Torsion non-constant type pivot device suitable for being manufactured by metal injection molding method

• Main Authors: HONG SHUNYU, CAI ZONGYANG, LIN MINGQIN, HUANG GUANWEI
• Format: Patent
• Language: Chinese; English
• Published: 12.05.2023
• Subjects: BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

The utility model relates to a torsion non-constant type pivot device which comprises a seat body, a shaft rod and an interference piece. A shaft hole is formed in the seat body in a concave mode, the shaft hole is a round hole, and an embedding groove is formed in the hole wall of the shaft hole in a concave mode. The shaft rod rotatably penetrates through the shaft hole of the seat body, the shaft rod is a circular shaft, and an interference releasing part is formed on the outer ring face of the shaft rod. The interference piece is embedded in the embedding groove of the base body and abuts against the shaft rod, and when the shaft rod rotates relative to the shaft hole, the interference piece abuts against the outer ring face of the shaft rod or interferes with the release part to generate rotation resistance. Therefore, the shaft hole of the seat body can be post-processed and trimmed by the reamer, so that the seat body and the torsion generating part can be integrally molded and combined by adopting a m