公开(公告)号：US12055191B2

公开(公告)日：2024-08-06

申请号：US17441069

申请日：2020-02-04

Applicant: SUNSTAR ENGINEERING INC.

Inventor： Satoshi Kubota ,  Yuki Murayama

IPC: F16D65/12 ,  F16D13/60 ,  F16D13/64 ,  F16H55/30 ,  F16D65/02

CPC classification number: F16D65/12 ,  F16D13/60 ,  F16H55/30 ,  F16D2065/1384

Abstract: A rotation transmission disc includes: an outer circumferential portion on which a load acts when rotation is transmitted; a center opening portion formed inside the outer circumferential portion; and a plurality of attachment holes for attachment of the rotation transmission disc 1 to a rotating element. A first crosspiece portions are formed in each of ranges of divided angles formed by two adjacent attachment holes with respect to a center of the rotation transmission disc. The first crosspiece portion extends from a load point, which is an intersection between a straight line extending in a radial direction to internally divide the divided angles at a predetermined angular ratio and a load radius position of the outer circumferential portion, to one of the attachment holes forming the divided angles. The second crosspiece portion extends from the load point to the other attachment hole of the attachment holes forming the divided angles.

公开(公告)号：US11859682B2

公开(公告)日：2024-01-02

申请号：US17441024

申请日：2020-03-02

Applicant: SUNSTAR ENGINEERING INC.

Inventor： Satoshi Kubota

IPC: F16D65/12 ,  B62L1/00 ,  F16D65/02

CPC classification number: F16D65/12 ,  B62L1/00 ,  F16D2065/1332

Abstract: A brake disc includes an outer circumferential portion including a waveform portion having recessed portions and projecting portions repeatedly formed over an outer circumference, and for the outer circumferential portion to have substantially uniform heat capacity distribution in a circumferential direction and in a radial direction, the outer circumferential portion is formed such that a ratio of a difference in heat capacities among a plurality of circumferential sections in the outer circumferential portion, which are sectioned at an equal angle in the circumferential direction, relative to a heat capacity of each circumferential section is equal to or less than a first predetermined ratio. A ratio of a difference in heat capacities among radial sections in the outer circumferential portion, which are sectioned to have an equal length in the radial direction, relative to a heat capacity of each radial section is equal to or less than a second predetermined ratio.

公开(公告)号：US11554407B2

公开(公告)日：2023-01-17

申请号：US17432764

申请日：2020-02-04

Applicant: SUNSTAR ENGINEERING INC.

Inventor： Tadashi Takenaka ,  Satoshi Kubota

IPC: F16D65/12 ,  B21D53/34 ,  B21D19/00 ,  B21D28/14 ,  F16D65/02

Abstract: In a brake-disc intermediate product, a corrugated portion is molded using an upper mold and a lower mold. The brake-disc intermediate product is set in a mold, the mold has a slope corresponding to the corrugated portion, and an angular portion formed along the outer circumferential edge of the corrugated portion is in contact with the slope in a state where the brake-disc intermediate product is set in the mold. The angular portion in contact with the slope is deformed by pressing the brake-disc intermediate product in a direction of the mold, to mold a chamfer portion. The slope is formed so that a chamfering angle formed with respect to an inner bottom surface of the mold is larger at a portion in contact with the concave portion than a chamfering angle at a portion in contact with the convex portion.

公开(公告)号：US12000472B2

公开(公告)日：2024-06-04

申请号：US17997366

申请日：2021-03-22

Applicant: Sunstar Engineering Inc. ,  YAMAHA HATSUDOKI KABUSHIKI KAISHA

Inventor： Satoshi Kubota ,  Yuya Okuda

IPC: F16H55/30

CPC classification number: F16H55/30

Abstract: Provided is a strong and lightweight sprocket. A sprocket according to one aspect of the present invention comprises: attachment holes 20 formed at equal intervals in the circumferential direction; a plurality of sprocket teeth 30 provided to the outer periphery; first openings 40 formed into substantially triangular shapes of which two corners each face an attachment hole 20 and the remaining corner is positioned toward the outer periphery; and second openings 50 that are formed into substantially triangular shapes of which one corner faces an attachment hole 20 and the remaining two corners are positioned toward the outer periphery, and that, with the first openings 40, demarcate first crossbars 70 with which driving force and load reaction force align and second crossbars 80 with which driving force and load reaction force conflict.