To enable an extendable shaft to undergo a smaller increase in the area of contact of a resin layer with an internal teeth, leading to less deterioration in its sliding characteristics.SOLUTION: An extendable shaft (intermediate shaft) 5 includes: an inner shaft 35 including a plurality of external teeth 41; an outer shaft 36 including a plurality of internal teeth 39 that slide relatively to the external teeth 41; and a resin layer 50 covering the external teeth 41. The pressure angle α of the external teeth 41 is different from the pressure angle β of the internal teeth 39.SELECTED DRAWING: Figure 3
【課題】伸縮軸において、外歯に対する樹脂層の接触面積の増加を抑制し、摺動性の低下を抑える。【解決手段】伸縮軸(中間軸5)は、複数の外歯41を有する内軸35と、複数の外歯41に対して摺動する複数の内歯39を有する外軸36と、外歯41に被覆された樹脂層50とを備えている。外歯41における圧力角αは、内歯39の圧力角βとは異なる。【選択図】図3
EXTENDABLE SHAFT
伸縮軸
2021-11-01
Patent
Elektronische Ressource
Japanisch
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