公开(公告)号：US09463844B2

公开(公告)日：2016-10-11

申请号：US14615349

申请日：2015-02-05

Applicant: SHIMANO INC.

Inventor： Yasufumi Fukunaga

IPC: F16H55/12 ,  F16H55/30 ,  B62M9/10

CPC classification number: B62M9/10

Abstract: A bicycle sprocket having a rotational center axis comprises a sprocket body and a chain engagement structure. The sprocket body is rotatable about the rotational center axis. The chain engagement structure includes an upshifting facilitation area configured to facilitate upshifting. The chain engagement structure includes a plurality of chain-engaging teeth configured to engage with a bicycle chain. The plurality of chain-engaging teeth includes at least three upshifting facilitation teeth configured to facilitate upshifting. The at least three upshifting facilitation teeth are adjacent to each other without another tooth between the at least three upshifting facilitation teeth. The at least three upshifting facilitation teeth are provided in the upshifting facilitation area.

Abstract translation: 具有旋转中心轴的自行车链轮包括链轮主体和链接结构。 链轮主体可围绕旋转中心轴线旋转。 链条接合结构包括构造成便于升档的升档促进区域。 链条接合结构包括构造成与自行车链条接合的多个链条啮合齿。 多个链条啮合齿包括至少三个升档辅助齿，其构造成便于升档。 所述至少三个升档促进齿彼此相邻，而在所述至少三个升档辅助齿之间没有另一齿。 至少三个升档辅助牙齿设置在升档辅助区域。

公开(公告)号：US11028916B2

公开(公告)日：2021-06-08

申请号：US16131965

申请日：2018-09-14

Applicant: Shimano Inc.

Inventor： Yasufumi Fukunaga ,  Tsuyoshi Fukumori

IPC: F16H55/30 ,  B62M9/00 ,  B62M9/12

Abstract: A bicycle sprocket includes a base body, a first sprocket tooth and a shifting initiation tooth. The first sprocket tooth includes a drive surface including a drive surface side tooth tip end portion, a non-drive surface including a non-drive surface side tooth tip end portion and a tooth tip portion connecting the drive surface side tooth tip end portion and the non-drive surface side tooth tip end portion. The non-drive surface extends circumferentially with respect to the rotational center axis from the non-drive surface side tooth tip end portion toward a first surface. The tooth tip portion extends circumferentially in a first direction between the drive surface side tooth tip end portion and the non-drive surface side tooth tip end portion. The non-drive surface extends circumferentially from the non-drive surface side tooth tip end portion in a second direction that is inclined with respect to the first direction.

公开(公告)号：US10926836B2

公开(公告)日：2021-02-23

申请号：US15686113

申请日：2017-08-24

Applicant: SHIMANO INC.

Inventor： Hiroshi Fujita ,  Atsuhiro Emura ,  Yasufumi Fukunaga ,  Tsuyoshi Fukumori

IPC: B62M9/10 ,  B60B27/04 ,  F16H55/30 ,  B60B27/02

Abstract: A bicycle rear sprocket assembly comprises a sprocket support and a first sprocket. The sprocket support includes a hub engagement part configured to engage with a bicycle hub assembly. The sprocket support includes a plurality of sprocket attachment members extending radially outwardly from the hub engagement part with respect to a rotational center axis of the bicycle rear sprocket assembly. The first sprocket is attached to the plurality of sprocket attachment members. The first sprocket includes a first sprocket body and a plurality of first sprocket teeth which extends radially outwardly from the first sprocket body with respect to the rotational center axis and a total number of which is equal to or larger than thirty-four. The first sprocket has a plurality of shifting facilitation areas. A total number of the plurality of shifting facilitation areas is a divisor of a total number of the plurality of sprocket attachment members.

公开(公告)号：US10577051B2

公开(公告)日：2020-03-03

申请号：US15705484

申请日：2017-09-15

Applicant: SHIMANO INC.

Inventor： Yasufumi Fukunaga ,  Atsuhiro Emura

IPC: B62M9/12 ,  F16H55/30

Abstract: A bicycle sprocket comprises a plurality of sprocket teeth including at least one first tooth and at least one second tooth. The at least one first tooth has a first non-driving surface including a first non-driving surface portion and a second non-driving surface portion so that a first ridge is formed between the first non-driving surface portion and the second non-driving surface portion. The at least one second tooth is configured to initially engage with the bicycle chain in a shifting operation. The at least one second tooth is disposed adjacent to the at least one first tooth. The at least one second tooth has a second non-driving surface including a third non-driving surface portion and a fourth non-driving surface portion so that a second ridge is formed between the third non-driving surface portion and the fourth non-driving surface portion.

公开(公告)号：US09885409B1

公开(公告)日：2018-02-06

申请号：US15263263

申请日：2016-09-12

Applicant: SHIMANO INC.

Inventor： Yasufumi Fukunaga

IPC: F16H55/12 ,  F16H55/30 ,  B62M9/10 ,  F16H57/00

CPC classification number: F16H55/30 ,  B62M9/10 ,  F16H57/0006

Abstract: A bicycle sprocket comprises a sprocket body and a plurality of chain-driving teeth. The sprocket body includes a radially outer periphery and an axial center plane. The plurality of chain-driving teeth include at least one noise-reduction tooth. The at least one noise-reduction tooth comprises a downstream circumferential surface, an upstream circumferential surface, and a first axial surface. The first axial surface is provided between the downstream circumferential surface and the upstream circumferential surface to face in an axial direction parallel to a rotational center axis. The first axial surface includes an inclined surface inclined relative to an axial center plane so that an axial width of the at least one noise-reduction tooth decreases from one of the upstream circumferential surface and the downstream circumferential surface to the other of the upstream circumferential surface and the downstream circumferential surface.

公开(公告)号：US09334014B2

公开(公告)日：2016-05-10

申请号：US14474275

申请日：2014-09-01

Applicant: SHIMANO INC.

Inventor： Yasufumi Fukunaga

IPC: F16H55/12 ,  F16H55/30 ,  B62M9/10 ,  F16H55/08

CPC classification number: B62M9/10 ,  B62M9/12 ,  F16H55/08 ,  F16H55/30

Abstract: A bicycle sprocket has a rotational center axis. The bicycle sprocket comprises a sprocket body and a chain engagement structure. The sprocket body has an axial width defined in an axial direction parallel to the rotational center axis. The chain engagement structure is arranged on a radially outer periphery of the sprocket body. The chain engagement structure includes at least one shifting facilitation area and a plurality of chain-engaging teeth. The at least one shifting facilitation area is configured to facilitate changing gears. The plurality of chain-engaging teeth include at least two neighboring chain-engaging teeth each including a chain-engaging portion configured to engage with a bicycle chain. The chain-engaging portion has an axial chain-engaging width defined in the axial direction. The axial chain-engaging width is larger than the axial width of the sprocket body.

Abstract translation: 自行车链轮具有旋转中心轴线。 自行车链轮包括链轮主体和链条接合结构。 链轮主体具有在与旋转中心轴平行的轴向上限定的轴向宽度。 链条接合结构布置在链轮主体的径向外周上。 链条接合结构包括至少一个移动促进区域和多个链接齿。 所述至少一个换档促进区域构造成便于换档。 多个链条啮合齿包括至少两个相邻的链条啮合齿，每个链接啮合齿均包括被配置成与自行车链条啮合的链条啮合部分。 链接合部分具有沿轴向限定的轴向链接宽度。 轴向啮合宽度大于链轮主体的轴向宽度。