Abstract:
A method manufactures a vehicle wheel that includes a wheel rim having a cylindrical shape and a wheel disc provided on an inner peripheral side of the wheel rim. The method includes forming a workpiece of the vehicle wheel by casting or forging, the workpiece being a metal alloy workpiece; cutting a part of the workpiece to form a cut surface; coating, with a colored paint, the cut surface, an edge where the cut surface intersects a surface of the workpiece, and at least a portion around the edge in the surface of the workpiece; and chamfering the edge to form a bright surface where the workpiece is exposed, after coating the cut surface, the edge, and at least the portion around the edge.
Abstract:
A wheel for a vehicle includes a plurality of Helmholtz resonators each including an auxiliary air chamber communicating with a tire air chamber through a communication hole. The Helmholtz resonators include one or more first Helmholtz resonators set to have a silencing characteristic for a first-order resonance frequency of air column resonance noise in the tire air chamber, and one or more second Helmholtz resonators set to have a silencing characteristic for a second-order or higher-order resonance frequency of the air column resonance noise.
Abstract:
A wheel for a vehicle includes: a wheel rim; a wheel disc; and a laser-welded portion made by joining the wheel rim and the wheel disc by laser welding. In a circumferential direction of the wheel, a total length of the laser-welded portion is equal to or more than 90% of a length of an entire circumference of the wheel disc. The wheel has, between the wheel rim and the wheel disc, at least one non-welded point at which the laser-welded portion is not provided in the circumferential direction of the wheel.
Abstract:
A vehicle wheel includes a hub portion, a rim portion, and a disc portion. The disc portion is arranged such that a window portion, a spoke portion, and a thin plate portion do not overlap when viewed from a wheel axis direction. The thin plate portion is connected to at least a part of the hub portion, the rim portion, and the spoke portion via a connection portion. A cross-sectional area of the connection portion that appears when the connection portion is cut in a wheel radial direction changes such that a cross-sectional area of an end of the connection portion becomes smaller than a cross-sectional area of another portion of the connection portion.
Abstract:
A vehicle wheel includes a hub portion attached to a vehicle, a substantially cylindrical rim portion, and a plurality of spoke portions connected to the rim portion and the hub portion. The plurality of the spoke portions have a window portion that penetrates in a wheel axial direction. An inclined surface is provided on a wheel back side of each of the spoke portions such that the inclined surface inclines toward a wheel front side from a center in a wheel circumferential direction toward the window portion. The inclined surface is provided at a portion including one end portion or both end portions in the wheel circumferential direction.
Abstract:
A manufacturing method for a vehicle wheel includes an overlap cutting step in which lathe machining is performed on a design portion of the vehicle wheel at feed speed that allows cutting marks to be connected with each other in a radial direction with a first cutting depth from a given reference position, and a non-overlap cutting step in which, after the overlap cutting step, lathe machining is performed on the design portion at feed speed that allows cutting marks to be separated from each other in the radial direction with a second cutting depth from the reference position, the second cutting depth being deeper than the first cutting depth.
Abstract:
A thermoacoustic electric generator system includes: a turbine including a turbine blade provided in an inside of a branched tube in a tube component and rotating by thermoacoustic oscillation of working gas in a thermoacoustic engine, and a turbine rotational shaft configured to be coupled to the turbine blade, penetrate a tube wall of the branched tube, and extend from the inside to an outside thereof; and a generator provided on the outside of the branched tube in the tube component, coupled to the turbine rotational shaft of the turbine, and converting rotational energy of the turbine blade to electric energy.
Abstract:
A vehicle wheel includes a wheel rim portion; a hub portion; a plurality of spoke portions extending radially from the hub portion to the wheel rim portion and connected to the wheel rim portion; and one or more extending portions each of which is configured to partially cover an opening portion provided between two adjacent spoke portions among the plurality of spoke portions, and to extend from the wheel rim portion toward the hub portion without contacting any of the hub portion and the plurality of spoke portions, the one or more extending portions having a thickness that is smaller than a thickness of each of the plurality of spoke portions in a cylindrical axis direction of the wheel rim portion.
Abstract:
A refitting apparatus for a tire assembly nullwnull having a disk wheel nullanull having engaging rims and a tire nulldnull fitted to the disk wheel and having tire bead rims and side walls. The apparatus is constituted to perform a refit process in which a pressing step of bringing one of the tire bead rims nullenull of the tire into pressing contact with one of the engaging rims nullbnull of the disk wheel nullanull by supplying air into the tire nulldnull and a releasing step of releasing the one of tire bead rims nullenull of the tire nulldnull from the one of engaging rims nullbnull of the disk wheel nullanull are repeated a predetermined number of times for each of the tire bead rims nullenull. Since the tire bead rims nullenull are repeatedly brought into pressing contact with the engaging rims nullbnull and released therefrom, the tire bead rims nullenull snugly fit with the engaging rims nullbnull, so that the RFV value is considerably lowered and stable maneuverability during driving can be obtained unless the fitting state is subsequently changed.
Abstract:
A method for manufacturing a vehicle wheel is a method for manufacturing a vehicle wheel including a wheel rim having a substantially cylindrical shape and a wheel disc provided on an inner peripheral side of the wheel rim. The method includes forming a workpiece of the vehicle wheel by casting or forging, the workpiece being a light metal workpiece; cutting a part of the workpiece to form a cut surface; coating, with a colored paint, the cut surface, an edge where the cut surface intersects a surface of the workpiece, and at least a portion around the edge in the surface of the workpiece; and chamfering the edge to form a bright surface where the workpiece is exposed, after coating the cut surface, the edge, and at least the portion around the edge.