公开(公告)号：US12031620B2

公开(公告)日：2024-07-09

申请号：US18233425

申请日：2023-08-14

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Shoichiro Shimizu ,  Yuta Watanabe ,  Akira Hirai

IPC: F16H55/30 ,  F16H7/06 ,  F16H55/06 ,  F16H55/08 ,  F16H57/04

CPC classification number: F16H55/30 ,  F16H55/088 ,  F16H57/0495 ,  F16H7/06 ,  F16H55/06 ,  F16H2055/086 ,  F16H2055/306

Abstract: An object of the present invention is to provide a sprocket that mitigates the impact of tension fluctuations resulting from load torque changes, suppresses noise and vibration, ensures stable chain behavior, prevents sprocket durability loss and the generation of harmonics during rotation, along with a chain drive system. Tooth roots between adjacent teeth of the sprocket include those with a radial deviation from a root circle of a standard tooth profile, set within a predetermined numerical range corresponding to a tooth pitch. A phase variation pattern is created by changing a root radius in accordance with an angular position. The phase variation pattern has a waveform with an amplitude varied within a range of (1/7)Amax, where Amax represents a maximum amplitude. The chain drive system includes a plurality of sprockets and a chain passed over the sprockets, at least one of them being the above-described sprocket.

公开(公告)号：US20240084885A1

公开(公告)日：2024-03-14

申请号：US18233425

申请日：2023-08-14

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Shoichiro Shimizu ,  Yuta Watanabe ,  Akira Hirai

IPC: F16H55/30 ,  F16H55/08 ,  F16H57/04

CPC classification number: F16H55/30 ,  F16H55/088 ,  F16H57/0495 ,  F16H7/06 ,  F16H2055/086 ,  F16H2055/306

Abstract: An object of the present invention is to provide a sprocket that mitigates the impact of tension fluctuations resulting from load torque changes, suppresses noise and vibration, ensures stable chain behavior, prevents sprocket durability loss and the generation of harmonics during rotation, along with a chain drive system. Tooth roots between adjacent teeth of the sprocket include those with a radial deviation from a root circle of a standard tooth profile, set within a predetermined numerical range corresponding to a tooth pitch. A phase variation pattern is created by changing a root radius in accordance with an angular position. The phase variation pattern has a waveform with an amplitude varied within a range of ( 1/7)Amax, where Amax represents a maximum amplitude. The chain drive system includes a plurality of sprockets and a chain passed over the sprockets, at least one of them being the above-described sprocket.