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    • 4. 发明授权
    • Gear arrangement
    • 齿轮排列
    • US6076419A
    • 2000-06-20
    • US236840
    • 1999-01-25
    • Daniel George MlejnekHarald PortigRichard Andrew Seman, Jr.
    • Daniel George MlejnekHarald PortigRichard Andrew Seman, Jr.
    • F16H1/06F16C17/02F16C33/20F16H1/20F16H55/06F16H55/17F16H57/00F16H57/021F16C33/02F16H57/02
    • F16H57/0031F16C17/02F16C33/20F16H57/021Y10S74/10Y10T74/19679Y10T74/2186
    • A plastic gear is rotatably supported on at least one plastic fixed support stud, which is preferably formed of plastic and molded on a metal support plate. The fixed support stud has three equiangularly spaced lobes extending from its outer surface without any nominal clearance with an inner surface of a hub of a plastic gear defining a bore in the gear hub to receive the fixed support stud. The lobes cause deformation of portions of the gear hub between the adjacent lobes. By increasing the clearance between the outer surface of the fixed support stud and the inner surface of the gear hub, spaces are provided between the adjacent lobes to allow portions of the inner surface of the gear hub to extend thereinto due to the deformation of the plastic. This reduces the vibration or jitter of the plastic gear, which is the output gear of a gear train for driving a photoconductive drum of a laser printer to improve its print quality.
    • 塑料齿轮可旋转地支撑在至少一个塑料固定支撑柱上,塑料固定支撑柱优选由塑料形成并模制在金属支撑板上。 固定的支撑柱具有从其外表面延伸的三个等角间隔开的凸角,与齿轮毂中限定一个孔的塑料齿轮的毂的内表面没有任何公称的间隙,以容纳固定的支撑柱。 叶片引起齿轮毂在相邻凸角之间的部分变形。 通过增加固定支撑柱的外表面和齿轮毂的内表面之间的间隙,在相邻的凸角之间设置空间,以允许齿轮毂的内表面的一部分由于塑料的变形而延伸到其中 。 这减少了作为用于驱动激光打印机的感光鼓的齿轮系的输出齿轮的塑料齿轮的振动或抖动,以提高其打印质量。