TOOTHED PULLY

• Main Authors: OKA NOBUMASA, YAMAMORI AYUMI, NAKAMURA SHIGEYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 28.07.2022
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a toothed pully whose teeth are formed of a thermoplastic resin having high productivity, for suppressing an increase in weight while securing the degree of precision of teeth.SOLUTION: A toothed pully A includes a cylindrical core metal B and a resin part C including teeth T, the core metal B consisting of a first core metal 1, and a second core metal 2 located outward in a radial direction L beyond the first core metal 1 so as to form a space G in the radial direction L from the first core metal 1, and concentric with the first core metal 1, the resin part C being a single component of a thermoplastic resin, including a resin in the space G between the first core metal 1 and the second core metal 2 and a resin of the teeth T. Since the core metal B consists of the first core metal 1 and the second core metal 2, the core metal B can be formed thinner to make the toothed pulley A lighter. The resin part C is formed of a thermoplastic resin to make the productivity of the toothed pully A higher. The second core metal 2 allows appropriate setting of the thickness of the resin part C located outward in the radial direction L beyond it to easily secure the required degree of precision of the teeth T.SELECTED DRAWING: Figure 3B 【課題】歯付きプーリの歯を生産性の高い熱可塑性樹脂としながら、歯の精度を確保して重量の増加を抑制する。【解決手段】円筒状の芯金Ｂと、歯Ｔを含む樹脂部Ｃとからなる歯付きプーリＡである。芯金Ｂは、第１芯金１と、第１芯金１に対して径方向Ｌの隙間Ｇをあけるように第1芯金１よりも径方向Ｌの外方に位置し、第１芯金１と同心である第２芯金２とからなる。樹脂部Ｃは、熱可塑性樹脂であるとともに、第１芯金１と第２芯金２との間の隙間Ｇの樹脂、及び歯Ｔの樹脂を含む同一の部品である。芯金Ｂが第１芯金１及び第２芯金２であることから芯金Ｂを薄肉化できるので、歯付きプーリＡを軽量化できる。樹脂部Ｃが熱可塑性樹脂であるので、歯付きプーリＡの生産性が高くなる。第２芯金２により、それより径方向Ｌの外方に位置する樹脂部Ｃの肉厚を適正に設定できるので、歯Ｔの要求精度を確保しやすい。【選択図】図３Ｂ