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PIANO ACTION ASSEMBLY

机译:钢琴行动大会

摘要

For use in the pivotal connections of wooden members in a piano action, a bushing formed of a suitable plastic or elastomeric material, such as Teflon, is inserted in bushing holes in each arm of a forked action member for supporting a bearing pin secured to the tongue portion of a mating action member. The bushing has an internal bore of substantially uniform diameter throughout its length, and an outer diameter at the end portions of that portion received in the bushing hole smaller than the outer diameter over the portion thereof mediate the end portions, whereby the bushing can rotate along its axis relative to the bushing hole so as to be self-aligning with the bearing pin received in the internal bore. Because of the "barrel shape" of the bushing, variations in the tolerance on the size of the bushing holes are taken up by compression, causing a slight reduction in the diameter of the internal bore and thereby providing a low-friction essentially line contact between the bushing and the bearing pin. Thus, the bushing is tightly held in the bushing hole, yet the center works freely, despite distortion of the wood parts when subjected to extreme climatic conditions.
机译:为了在钢琴演奏中的木质构件的枢轴连接中使用,将由合适的塑料或弹性材料制成的衬套,例如特氟隆,插入到叉状作用构件的每个臂的衬套孔中,以支撑固定到琴键上的轴承销。配合动作部件的舌状部分。衬套在其整个长度上具有直径基本均匀的内孔,并且在容纳在衬套孔中的该部分的端部处的外径小于在其一部分上的外径介导的端部,由此衬套可以沿其旋转其轴线相对于衬套孔的轴线与容纳在内部孔中的轴承销自对准。由于衬套的“桶形”,衬套孔尺寸公差的变化可通过压缩来吸收,从而使内孔的直径略有减小,从而在相互之间提供低摩擦的基本线接触衬套和轴承销。因此,尽管在极端的气候条件下木质部分会变形,但衬套仍牢牢地固定在衬套孔中,而中心却可以自由工作。

著录项

  • 公开/公告号JPS5515038B2

    专利类型

  • 公开/公告日1980-04-21

    原文格式PDF

  • 申请/专利权人

    申请/专利号JP19760016880

  • 发明设计人

    申请日1976-02-18

  • 分类号F16C27/02;G10C3/16;

  • 国家 JP

  • 入库时间 2022-08-22 19:07:51

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