| 摘要 |
PURPOSE:To aim at enhancing the strength of a composite wheel rim composed of a rim, a bead seat band, a lock ring and a side ring, by setting an angle at which the bead seat band makes into contact with the rock ring, to a specific value with respect to the axis of the rim. CONSTITUTION:A composite wheel rim assembly composes of a wheel rim 11 having a rim base 11a at its one end edge, a bead seat band 14, a side ring 15 and a lock ring 16, has an endless lock ring groove 12 and an O-ring groove 17 extends continuously in the circumferential direction in the outer peripheral surface of the rim base 11. The bead seat band 14 is fitted on the outer peripheral surface of the bead seat band 11 with its flange 14a being faced to the rim end surface side. In this arrangement the lock ring 16 is made to abut against and is fitted and held on the bead seat band 14 just below the flange 14a, being inclined at an angle of 30 deg.-40 deg. with respect to the rim shaft. With this arrangement, the bead seat band 14 and the rock ring 16 are made to be difficult in slipping relative to each other along the abutting surface (a) therebetween.
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