1results about How to "Increase critical size" patented technology

This invention discloses a high-reliability ball-locking bearing structure for a top hob and its assembly method. The hob includes a hob shaft, a hob wheel body, and a small-end sealing cap. A large-end sealing cap is integrally mounted on the hob shaft, and the small-end sealing cap is fitted into the hob shaft. A bearing cavity is formed between the inner bore of the hob wheel body and the journal of the hob shaft. The inner bore of the hob wheel body has a large raceway, an R-groove, and a small raceway sequentially formed. Large and small rollers are respectively fitted into the large and small raceways to form a roller bearing. The R-grooves of the hob shaft and the hob wheel body are correspondingly arranged, and balls are fitted inside to form a ball bearing. The two ends of the bearing cavity are sealed by a large-end floating metal sealing ring and a small-end floating metal sealing ring. Both the large-end and small-end floating metal sealing rings have two functional rings. This invention eliminates the bearing rings and multiple fixed sealing structures, thereby improving load-bearing capacity while solving the problem of cap loosening, achieving a synergistic improvement in high load-bearing capacity and high reliability.