Abstract: A damper device includes an input element; an intermediate element; art output element; a first elastic body that transmits a torque between the input element and the intermediate element; and a second elastic body that transmits a torque between the intermediate element and the output element. The damper device also includes a rotary inertia mass damper that includes a first mass body rotating in accordance with relative rotation between the input element and the output element and that is arranged between the input element and the output element to be parallel to a torque transmission path including the first elastic body, the intermediate element and the second elastic body. Finally, the damper devices includes a second mass body; and an elastic body arranged to couple the second mass body with the output element.

Abstract: A damper device including an input element and an output element; an elastic body transmitting torque between the input element and the output element; and a rotary inertia mass damper having a mass body. The rotary inertia mass damper includes a sun gear, a carrier rotatably supporting pinion gears, and a ring gear that meshes with the pinion gears and serving as the mass body. A pair of washers is located on both sides of each pinion gear axially. The ring gear includes an annulus gear having internal teeth meshing with the pinion gears and a weight body fixed to the annulus gear such that the weight body is in contact with a side surface of the annulus gear. An inner circumferential surface of the weight body is supported in a radial direction by a tip of the pinion gear or an outer circumferential surface of the washer.

Abstract: A damper device of the present disclosure includes an input element to which torque from an engine is transmitted, an output element, and an elastic body that transmits torque between the input element and the output element. The input element is formed to enclose the elastic body. The output element includes a clearance portion that allows passage of a tool for attaching and detaching the engine and the input element. A sealing member is disposed between the input element and another member other than components of the damper device so as to restrict an entry of foreign substances into the input element on the outside the clearance portion in a radial direction. As a result, assemblability and maintenability of the damper device can be further improved while restricting the entry of foreign substances into the input element formed to enclose an elastic body.

Abstract: A laser welding device includes a chamber which has an internal space in which a workpiece is disposed, a laser beam irradiation unit which irradiates the workpiece with a laser beam to weld the workpiece, a vacuum pump which suctions air in the chamber to decrease a pressure in the chamber, a laser transmission window through which the laser beam emitted from the laser beam irradiation unit is transmitted, and a shutter which is disposed on the chamber side with respect to the laser transmission window and closed when the pressure in the chamber is returned to the atmospheric pressure after laser welding.

Abstract: The laser welding device includes a laser transmission window and a gas injection nozzle. The gas injection nozzle includes an optical path hole and an injection unit that injects an inert gas for shielding metal vapor into the optical path hole toward an irradiation direction (E) side and an optical axis (A) side of a laser beam (L).

Abstract: A damper device including an input element to which a torque from an engine is transmitted; an output element; an elastic body to transmit torque between the input element and the output element; and rotary inertia mass damper having a mass body that rotates in accordance with a relative rotation of the input element and the output element. The output element is coupled to a rotor of an electric motor, which is coupled to an input shaft of a transmission. The rotary inertia mass damper includes a planetary gear mechanism having a carrier that supports pinion gears, the carrier is a part of the input element, one of the sun gear and the ring gear is a part of the output element, and the other of the sun gear and the ring gear functions as the mass body.

Abstract: This laser welding device includes a tubular portion. The tubular portion includes a first tubular portion and a second tubular portion. The second tubular portion has a constant cross-sectional shape orthogonal to an irradiation direction along the irradiation direction E. The tubular portion has a predetermined length that is longer than a length of a chamber in the irradiation direction.

Abstract: A damper device includes a plurality of rotational elements, a plurality of elastic bodies, a rotary inertia mass damper and a housing that houses the plurality of rotational elements, the plurality of elastic bodies and the rotary inertia mass damper, the housing including a front cover. The rotary inertia mass damper is configured to include a planetary gear that includes a sun gear, a plurality of pinion gears, and a carrier that rotatably supports the plurality of pinion gears. The carrier is centered by either the sun gear or a member that rotates integrally with the sun gear by being radially supported by either the sun gear or the member that rotates integrally with the sun gear. In addition, the carrier is spline-engaged to the front cover when a lockup clutch is engaged.

Abstract: In a mold, at least one of a lower mold and an upper mold includes a coolant supply passage through which a liquid coolant is supplied to an inner space of a recess, and the mold includes an air escape passage through which air in the inner space of the recess is discharged upward.

Abstract: A cooling method for a workpiece includes placing entirety of the workpiece in an inner space of a recess provided on a molding surface of a lower mold, pressing or restraining the workpiece by a mold including the lower mold and an upper mold in which a protrusion corresponding to the recess of the lower mold is provided on a molding surface, supplying a liquid coolant to the inner space of the recess through a coolant supply passage provided in at least one of the lower mold and the upper mold by a pump, and discharging air in the inner space of the recess upward through an air escape passage, and cooling the workpiece by immersing the entirety of the workpiece, which has been heated, in the liquid coolant that fills the recess.

Abstract: A vehicle drive apparatus includes: a sleeve including a first peripheral surface provided side by side with a spline; a connecting member including a groove provided side by side with a spline in spline engagement with the spline, recessed radially relative to the first peripheral surface, and including a bottom surface that serves as a second peripheral surface facing the first peripheral surface; and a tolerance ring disposed in the groove so as to exert a radial elastic force between the sleeve and the connecting member.

Abstract: A drive member of a damper device includes a first input plate member and a second input plate member that rotatably support a plurality of pinion gears of a planetary gear of a rotary inertia mass damper. A driven member includes an outer teeth gear portion that meshes with the pinion gear in an outer circumferential portion thereof and is disposed between the first and the second input plate members in an axial direction so as to work as a sun gear of the planetary gear. A stopper is configured to restrict the relative rotation between the drive member and the driven member and includes a contact portion arranged in the outer circumferential portion of the driven member so as to contact with the first input plate member.

Abstract: A torsional vibration damper whose vibration damping performance will not be reduced in a high speed range. In the torsional vibration damper, a planetary gear is oscillated within a first oscillating range when a torsional torque is smaller than a reference torque, and within a second oscillating range when the torsional torque is greater than the reference torque. Each backlash between the pinion gear and at least one of a sun gear and a ring gear within the second oscillating range is individually wider than each backlash between the pinion gear and the sun gear and each backlash between the pinion gear and the ring gear within the first oscillating range.

Abstract: A damper device includes a plurality of rotational elements including an input element and an output element; an elastic body that transmits a torque between the input and the output elements; and a rotary inertia mass damper with a mass body rotating in accordance with a relative rotation between a first rotational element which is one of the rotational elements and a second rotational element different from the first rotational element. The rotary inertia mass damper includes a sun gear that rotates integrally with the first rotational element, pinion gears rotatably supported by the second rotational element, and a ring gear that meshes with the pinion gears and works as the mass body. The second rotational element includes a plurality of ring gear supporting portions arranged at intervals in a circumferential direction so as to restrict a movement of the ring gear in an axial direction of the damper device.

Abstract: A torsional vibration damper that a torsional vibration damper having a planetary gear unit, and a manufacturing method of the torsional vibration damper for limiting damages on gears of the planetary gear unit due to dimension errors. In the planetary gear unit, at least one of a sun gear, a ring gear, and a set of planetary gears is/are formed by a press forming method. The gear formed by the press forming method is engaged with the remaining gears in such a manner that a thinner portion of each tooth is individually engaged with a thicker portion of the adjacent teeth of the remaining gears.

Abstract: A washer having such a thickness t that a value (L3?(L1+L2+t)) obtained by subtracting the sum of a first distance L1 in an axial direction between a leading end face of a friction member and a face of a lockup piston, a second distance L2 in the axial direction between a shell-side abutting face of a pump shell and a face of an outside extended portion of an output hub, and the thickness t in the axial direction of the washer, from a third distance L3 in the axial direction between an opposed face of a front cover and a cover-side abutting face of a tubular portion, is in a predetermined range larger than zero, is selected and placed between the lockup piston and the outside extended portion of the output hub.

Abstract: A torsional vibration damper whose vibration damping performance will not be reduced in a high speed range. In the torsional vibration damper, a planetary gear is oscillated within a first oscillating range when a torsional torque is smaller than a reference torque, and within a second oscillating range when the torsional torque is greater than the reference torque. Each backlash between the pinion gear and at least one of a sun gear and a ring gear within the second oscillating range is individually wider than each backlash between the pinion gear and the sun gear and each backlash between the pinion gear and the ring gear within the first oscillating range.

Abstract: A torsional vibration damper that damps torsional vibration effectively in a low-speed range. In the torsional vibration damper, a spring holder is formed by apertures of an input element and an output element, and an elastic member is held in the spring holder. A first moveable range of a planetary element extending from an initial position in a drive direction is wider than a second movable range of the planetary element extending from the initial position in a counter direction.

Abstract: A damper device including an input element and an output element; an elastic body transmitting torque between the input element and the output element; and a rotary inertia mass damper having a mass body. The rotary inertia mass damper includes a sun gear, a carrier rotatably supporting pinion gears, and a ring gear that meshes with the pinion gears and serving as the mass body. A pair of washers is located on both sides of each pinion gear axially. The ring gear includes an annulus gear having internal teeth meshing with the pinion gears and a weight body fixed to the annulus gear such that the weight body is in contact with a side surface of the annulus gear. An inner circumferential surface of the weight body is supported in a radial direction by a tip of the pinion gear or an outer circumferential surface of the washer.

Abstract: A damper device includes rotating elements including an input element and an output element, first elastic bodies that each transmit torque between the input element and the output element, a plurality of second elastic bodies that act in parallel with the plurality of first elastic bodies when torque transmitted between the input element and the output element is greater than or equal to a predetermined value, and a rotary inertia mass damper. The rotary inertia mass damper includes a sun gear, a carrier that rotatably supports a plurality of pinion gears, and a ring gear that meshes with the plurality of pinion gears and that serves as a mass body. The plurality of second elastic bodies are located at a different position than the plurality of first elastic bodies in a radial direction of the rotating elements and are circumferentially aligned with the plurality of pinion gears.