公开(公告)号：US11143274B2

公开(公告)日：2021-10-12

申请号：US16268735

申请日：2019-02-06

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Yoji Sato

IPC: F16H7/08

Abstract: To provide a chain tensioner that can suppress oil leakage from a gap between a plunger bore and a plunger to achieve stable damping characteristics and that can avoid an increase in production cost, with a simple structure. The chain tensioner includes a packing member that is provided on an inner circumferential side of the plunger bore and that suppresses oil leakage from a cylindrical outer surface of the plunger. The plunger is provided with an oil leak passage that extends from an oil pressure chamber inside the plunger to the outside.

公开(公告)号：US11143100B2

公开(公告)日：2021-10-12

申请号：US16225139

申请日：2018-12-19

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Yoshitaka Iwasaki ,  Masanori Watanabe ,  Osamu Yoshida ,  Yuji Kurematsu ,  Yuichiro Ishikawa

IPC: F02B67/06 ,  F16H7/08

Abstract: To provide a tensioner that has a simple structure and is easy to assemble, and is configured to smoothly relieve pressure during oil release with reduced flow resistance so that the oil pressure in an oil pressure chamber is kept stable in a favorable manner. A relief valve unit includes a cap member that fits with a seat member to retain a stopper member inside the seat member. An external relief hole, which causes a relief-side space in a plunger hole to communicate with the outside of a plunger, opens radially in an outer circumferential surface of the plunger.

公开(公告)号：US20210285517A1

公开(公告)日：2021-09-16

申请号：US16330543

申请日：2017-09-22

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Takayuki Tetsuka ,  Tamaki Shiki

IPC: F16G13/16 ,  H02G3/04 ,  H02G11/00

Abstract: An elongated object guiding device includes links arranged in series. Adjacent ones of the links are pivotally coupled to each other. An accommodation chamber is defined in the links. Each link includes an inner recess, an inner projection, an outer recess, and an outer projection that limit a pivoting range of the link and an adjacent link so that the links are pivoted between a straight state and a bent state. Each link includes a separating member that separates elongated objects accommodated in the accommodation chamber from each other. Each separating member is pivotally coupled to an adjacent separating member. Each separating member includes a through-hole and a sliding portion that limit a pivoting range of the separating member and an adjacent separating member so that a limit on a first side of the pivoting range is the straight state.

公开(公告)号：US20210156456A1

公开(公告)日：2021-05-27

申请号：US17036315

申请日：2020-09-29

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Masanori Watanabe ,  Shuji Hamaguchi

IPC: F16H7/08

Abstract: An object of the present invention is to provide a tensioner lever that can reduce vibration and noise when the chain runs, and realize smooth attachment into an engine with minimal deformation of the lever body with a simple configuration. A tensioner lever according to the present invention includes a lever body and a torsion coil spring pressed the lever body toward the chain. The lever body includes a stopper member mounting part where a stopper member by which the support arm of the torsion coil spring is locked and which retains the torsion coil spring in a compressed state is removably mounted. The stopper member mounting part is located closer to a distal end of the lever body than a center position in the longitudinal direction of the lever body, or a center of gravity position of the lever body.

公开(公告)号：US11002343B2

公开(公告)日：2021-05-11

申请号：US16353199

申请日：2019-03-14

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Yoji Sato

IPC: F16H7/08

Abstract: Provided is a tensioner capable of reducing a machining or mounting load and preventing leakage of oil from a surface for mounting a tensioner with a simple configuration. A tension body having a plunger-receiving hole into which a plunger is slidably inserted is configured to have a projection portion on a mounting surface that face a wall surface having an oil discharge hole of amounting target object. The projection portion is configured to be inserted into the oil discharge hole and to be continuously connected to the oil supply path formed in the tensioner body to form an oil passage.

公开(公告)号：US20200309242A1

公开(公告)日：2020-10-01

申请号：US16801472

申请日：2020-02-26

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Yuji Kurematsu

IPC: F16H55/16 ,  F16H55/30 ,  F16H55/06

Abstract: To provide a sprocket that reduces the influence of tension fluctuations concurrent with load torque changes to suppress noise and vibration and that allows for a weight reduction while retaining high strength as well as enables high productivity, and a drive mechanism that uses this sprocket. Sprocket teeth are configured by providing a cushioning layer on tooth faces of tooth portions of a sprocket base body made of a high-rigidity material. The sprocket teeth include the cushioning layer that varies in thickness.

公开(公告)号：US10533655B2

公开(公告)日：2020-01-14

申请号：US15726457

申请日：2017-10-06

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Takayuki Nishi

IPC: F16H59/02 ,  F16H3/10 ,  F16D41/04 ,  F16D41/067 ,  F16H29/06 ,  F16D41/08

Abstract: A one-way clutch includes one or more annular members and one or more annular elastic bodies. The annular member is attached to a side plate of an outer race in the axial outer side of a seal member and includes a facing surface that faces an outer circumferential surface of an inner race with a gap and a recess formed in the facing surface. The annular elastic body is fitted into the outer circumferential surface of the inner surface corresponding to the recess so as to be in close contact therewith.

公开(公告)号：US10400869B2

公开(公告)日：2019-09-03

申请号：US15677331

申请日：2017-08-15

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Toshifumi Sato ,  Takeo Sasaki ,  Kosuke Fujishima

IPC: F16H7/06 ,  F16G13/04 ,  F16H55/30

Abstract: A simple-structured, easy-to-produce chain drive mechanism is provided, which can reduce the overall noise level irrespective of chain length or rpm, while suppressing noise and vibration caused by tension fluctuations and maintaining durability and service life. The engagement/seating mode between a silent chain and a driving sprocket is one of inside-flank engagement/inside-flank seating, inside-flank engagement/outside-flank seating, outside-flank engagement/inside-flank seating, and outside-flank engagement/outside-flank seating. The engagement/seating mode between the silent chain and a driven sprocket is one of inside-flank engagement/inside-flank seating, inside-flank engagement/outside-flank seating, outside-flank engagement/inside-flank seating, and outside-flank engagement/outside-flank seating. The engagement/seating mode between the chain and the driving sprocket is different from that between the chain and the driven sprocket.

公开(公告)号：US10364869B2

公开(公告)日：2019-07-30

申请号：US14166986

申请日：2014-01-29

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Yuji Kurematsu ,  Katsuya Nakakubo ,  Takeshi Ogawa

IPC: F16H7/18

Abstract: There is provided a chain guide that reduces a space occupied by the chain guide in an engine room while maintaining required strength, rigidity, and durability with a simple configuration, reduces the number of manufacturing steps and the waste of a material, does not require a structure that permits an error, prevents increases in vibration and noise during use, and reduces the burden of a maintenance operation. The chain guide has a guide shoe and a base member that reinforces the guide shoe, and an attachment portion includes an attachment member that is provided separately from the guide shoe and the base member and can be fixed to at least one of the guide shoe and the base member or both of the guide shoe and the base member.

公开(公告)号：US10323730B2

公开(公告)日：2019-06-18

申请号：US15224790

申请日：2016-08-01

Applicant: TSUBAKIMOTO CHAIN CO.

Inventor： Kohei Kunimatsu ,  Masanori Watanabe

IPC: F16H7/08

Abstract: Provided is a simple-structured tensioner that can reduce the processing and assembling workload. A tensioner 10 includes a plunger 20, a housing 30, a main spring 60, and a relief valve 40. The relief valve 40 includes a seat member 41, a valve member 42, and a relief spring 43. The plunger 20 includes an outward relief passage 23, and a bottom protrusion 22a protruding rearward integrally with and continuously from a plunger bottom 22. The relief spring 43 is disposed such that one end thereof is in contact with the valve member 42 while the other end is attached to the bottom protrusion 22a.