Abstract:
An automotive passenger vehicle full face wheel having a sheet metal disc-rim including a central bolt circle mounting portion, an intermediate portion extending generally radially outwardly therefrom and an outer peripheral portion surrounding the intermediate portion having an outboard tire bead retaining flange. The rim part includes a rim edge portion extending circumferentially continuously adjacent the rim outboard lead seat and permanently joined by a continuous weld to the disc-rim outer peripheral portion. In a first embodiment the disc-rim intermediate portion has an outboard-concave bowl shape with a radius of curvature ranging about 10.50 to about 11.00 inches. The bolt circle mounting portion has pad surfaces defining a wheel mounting plane and a frusto conical transition portion outboard divergent therefrom joined integrally to the bowl portion by an annular bend portion spaced axially from the mounting plane about 0.75 to 1.50 inches. In a second embodiment the disc-rim intermediate bowl portion is integrally joined to the outer peripheral portion at a bend junction radially spaced inwardly from the rim edge flange portion about 14.30 to 13.71 inches. The disc-rim bowl portion has a radius of curvature of about 10.50 to 11.00 inches and the wheel offset dimension is about 1.0 to 1.25 inches.
Abstract:
A take-apart tire and wheel assembly including a multi-piece wheel rim having axially spaced bead flanges, a rim base, and a pneumatic tubeless tire, preferably adapted to removably receive in its tire inflation chamber a safety runflat insert. The wheel assembly also includes a safety vent for preventing inflation of the tire cavity in the event of improper assembly or disassembly of the safety tire and wheel assembly, including an O-ring seal disposed between opposing portions of rim segments of the wheel assembly, and mounting studs and associated nuts that releasably clamp the rim segments together with the O-ring captured in compression therebetween. The outboard wheel rim segment includes a wheel mounting disc and also a safety inflation valve coupling fixed to the outboard rim segment. The rim segment and coupling each have a through passageway and together define an interior air passage which communicates with the tire cavity. At least one of the through passageways is permanently connected to the rim segment and has a safety control cross sectional configuration adapted to prevent passage therethrough of an air inflation valve provided on an inner tube of sufficient size to fit within said tire cavity and capable when inflated of rendering said wheel and tire assembly normally operable for supporting its normal vehicle load in a run-mode of the vehicle. The safety inflation valve coupling and rim segment are thus operable to prevent insertion of such an inner tube valve through the one passageway permanently rim-connected. The coupling itself may be permanently or removably connected to the rim segment.
Abstract:
Manufacture of brake drums having an annular brake ring and a drum back for mounting the ring for rotation about an axis defined at least in part by one or more openings in the back. Radial runout of the brake ring is measured, and the mounting openings in the drum back are located at a position to substantially cancel the first harmonic of measured radial runout. The radially inwardly directed braking surface of the drum ring is then finish-machined on a cylinder of revolution coaxial with the drum back mounting openings so as to provide a brake ring of substantially uniform thickness and weight distribution about the axis of rotation defined by the drum back mounting openings.
Abstract:
A fiber-reinforced composite vehicle wheel that comprises an annular rim for receiving a vehicle tire and a central disc internally spanning the rim for mounting the rim and tire on a vehicle. Mounting openings are formed in the wheel disc in an array that surrounds the wheel axis of rotation, and are received in assembly with a vehicle over mounting studs that project from a mounting plate. Mounting nuts are threaded onto the studs and seated against opposing axially-oriented conical surfaces of the wheel disc surrounding each mounting opening for clamping the wheel firmly against the mounting plate. A layer of antiseize lubricant is located on the disc seating surfaces surrounding the mounting openings prior to assembly of the fastener nuts.
Abstract:
A method of molding a cup-shaped article such as integral vehicle wheel rim and disc segment, wherein a plurality of sections of resin-impregnated cloth are placed over a substantially cylindrical mandrel. The cloth sections are substantially identical and have circular central portions which are stacked on the mandrel end face, and oppositely projecting wings which are draped over and are circumferentially staggered around the mandrel sidewall. The central axis of each sheet section is at an angle of 45.degree. to the warp and weft fibers of the section cloth. The sheet sections thus form a mold charge which is compression molded to form an integral vehicle wheel rim and disc segment.
Abstract:
Method for molding a composite metal-elastomer styled wheel in which a middle mold part consists of a metal wheel disc and rim subassembly. A base mold part seats against the outboard face of the metal wheel in the closed condition of the mold and has a mold cavity surface to provide an ornamental configuration for the outboard face of the plastic body of the composite wheel. There is a clamp which includes a funnel adapted for registry with a liquid reaction mixture injection nozzle coupled with injecting mixing apparatus. The funnel has a nozzle passage registering with a pour opening in the disc in the closed condition of the mold. A sprue pin is affixed to the base mold part in juxtaposed relation to the disc pour opening and cooperates with the margin of the pour opening to define a restricted access opening to the mold cavity during the injection pour of the urethane reaction mixture. The sprue pin is operable to restrict back-flow of the reaction material during gelation of the same in the cure cycle. The sprue pin and disc in the vicinity of the pour opening define a zone of weakness in the cured urethane reaction mixture operable to induce fracture in the zone upon separation of the base mold part from the middle part to thereby cause cleavage of the urethane reaction material adjacent the inboard surface of the middle mold part.
Abstract:
A composite styled wheel having a metal wheel mounting disc and rim secured together and adapted to receive a tire thereon, and a plastic ornamental overlay body permanently affixed and covering at least a part of the outboard face of the disc and/or rim. The body is made of an elastomeric material, and its outboard face has a decorative contour exposed to view from the outboard side of the wheel. Hub cap retainer grooves or pockets are provided in the outboard face of the body adapted to individually yieldably engage and retain attachment prongs of a hub cap for removable attachment of the same to the wheel. Each of the grooves or pockets has an opening at an outboard face of the body with juxtaposed entrance edges spaced apart a distance less than a maximum transverse dimension of the associated prong to provide an interference fit therewith. Each groove or pocket also has an interior wall surface defining an undercut relationship relative to the opening edges. The entrance edges and the contiguous interior wall surface are yieldable so as to spread apart to permit insertion of the associated prong and then to return to a spring keeper relationship once the associated prong reaches a seated position in the groove or pocket matching the fully seated position of the hub cap on the body.
Abstract:
Apparatus for molding a composite metal-elastomer styled wheel in which a middle mold part consists of a metal wheel disc and rim subassembly. A base mold part seats against the outboard face of the metal wheel in the closed condition of the mold and has a mold cavity surface to provide an ornamental configuration for the outboard face of the plastic body of the composite wheel. A clamp seats against the inboard face of the middle mold part to urge the middle part into sealing engagement with the base mold part. The mold parts are axially separable from one another to open the molding apparatus to clear the middle mold part from said clamp and base mold parts. The clamp includes a funnel adapted for registry with a liquid reaction mixture injection nozzle coupled with injecting mixing apparatus. The funnel has a nozzle passage registering with a pour opening in the disc in the closed condition of the mold. A sprue pin is affixed to the base mold part in juxtaposed relation to the disc pour opening and cooperates with the margin of the pour opening to define a restricted access opening to the mold cavity during the injection pour of the urethane reaction mixture.
Abstract:
Apparatus and method for manufacturing a vehicle wheel rim and disc assembly with controlled lateral runout characteristics, as well as the resulting wheel and a pneumatic tire and wheel assembly having overall improved ride characteristics. The method and apparatus of the invention contemplate fixturing of a preformed rim so that the average plane of the rim bead seats is at preselected orientation with respect to the axis of interference pressfit of a preformed disc therein, and thus at preselected orientation with respect to the wheel mounting plane defined by the inboard disc surface. In one implementation of the invention, the average bead seat plane is made nominally parallel to the wheel mounting plane by selective adjustment of the fixturing bead seat locators, so as to minimize lateral runout of the resulting wheel. In another implementation of the invention, the average bead seat plane is intentionally angulated with respect to the disc mounting plane so as to locate a peak of the first harmonic of lateral runout circumferentially adjacent to a selected location on the wheel rim, such as the rim valve hole. In the latter implementation, the wheel so formed may be assembled to a pneumatic tire which is pretested and marked to identify location of a complementary peak of the first harmonic of lateral force variation, so that the respective harmonics are out of phase and tend to cancel each other, and thereby obtain overall improved ride in the tire and wheel assembly.