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公开(公告)号：US11066085B2
公开(公告)日：2021-07-20
申请号：US16482197
申请日：2018-01-16
发明人： Yoshihiro Tamura , Yukitaka Taga , Fumikazu Kounoike , Takaya Ono
IPC分类号： B61F5/30
摘要： An axle box suspension of a railcar includes: a coupler extending from the axle box in a car longitudinal direction and including a tubular portion at a tip end portion of the coupler, the tubular portion opens toward both sides in a car width direction, the coupler coupling the axle box and a bogie frame; a core rod inserted into an internal space of the tubular portion, a pair of protruding portions provided at both respective sides of the core rod in the car width direction; an elastic bushing interposed between the tubular portion and the core rod; a pair of receiving seats at the bogie frame, including a pair of recess portions and a pair of groove portions, a pair of lids supporting the pair of protruding portions fitted into the pair of groove portions, and fasteners fixing the lids to the receiving seats.
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公开(公告)号：US10906565B2
公开(公告)日：2021-02-02
申请号：US16065887
申请日：2016-11-29
发明人： Yukitaka Taga , Fumikazu Kounoike , Yukihiro Sano , Takaya Ono
摘要： A railcar bogie axle box suspension axle beam includes an end portion d at a tip end, a tubular portion at the end portion and being open at both car width direction sides. The tubular portion includes: a first semi-tubular portion integrally formed with a main body portion; a second semi-tubular portion brought into contact with the first semi-tubular portion from one side in the car longitudinal direction; and a bolt fastening the second semi-tubular portion to the first. The first semi-tubular portion includes: a flat opposing surface contacting the second semi-tubular portion; and a hole into which the bolt is inserted. The second semi-tubular portion includes: a flat opposing surface contacting with the first semi-tubular portion surface; a flat machining reference surface formed at an opposite side of the opposing surface; and a hole extending in a direction perpendicular to the opposing surface, the bolt inserted into the hole.
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公开(公告)号：US11104360B2
公开(公告)日：2021-08-31
申请号：US16302597
申请日：2017-03-21
发明人： Takaya Ono , Yukitaka Taga , Fumikazu Kounoike
摘要： A method of assembling a railcar bogie includes: a plate spring arranging step of making a pair of axle boxes support a plate spring extending in a car longitudinal direction, the axle boxes being arranged away from each other in the car longitudinal direction; a bogie frame arranging step of placing a bogie frame directly or indirectly on a longitudinal direction middle portion of the plate spring from above, the bogie frame including a side wall on which an opening is formed, the side wall covering the plate spring from an outside in a car width direction; and a measuring step of measuring a positional deviation between the plate spring and the bogie frame in the car longitudinal direction through the opening.
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公开(公告)号：US10766508B2
公开(公告)日：2020-09-08
申请号：US16065846
申请日：2016-11-29
发明人： Yukitaka Taga , Fumikazu Kounoike , Yukihiro Sano , Takaya Ono
摘要： A railcar bogie includes a cross beam, an axle box, a supporting member, a plate spring, and an axle beam. The axle box accommodates a bearing rotatably supporting a wheelset. The supporting member is provided at an upper portion of the axle box. The plate spring supports a car width direction end portion of the cross beam and extends in a car longitudinal direction, and the plate spring includes a car longitudinal direction end portion supported by the supporting member. The axle beam couples the axle box and the cross beam in the car longitudinal direction and is opposed to the plate spring in an upward/downward direction. An installation seat is provided at an upper surface of the axle beam and includes an installation surface on which a pushing-up device configured to push up a lower surface of the plate spring can be placed.
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公开(公告)号：US11136051B2
公开(公告)日：2021-10-05
申请号：US16065978
申请日：2016-11-29
发明人： Yukitaka Taga , Fumikazu Kounoike , Yukihiro Sano , Takaya Ono
IPC分类号： B61F15/06 , B61F5/30 , B61F5/00 , B61F19/00 , B61F15/00 , B23P15/20 , B22D7/00 , B22D25/00 , B61F3/02
摘要： A railcar axle box includes an axle box main body accommodating a bearing supporting an axle. The axle box main body includes: an inner surface defining an accommodating space accommodating the bearing; a first side surface provided at an outer side of the inner surface and at one car width direction side of a car width direction center of the accommodating space; and a second side surface provided at an outer side of the inner surface and at the other car width direction side of the center. A shortest distance between the first side surface and the car width direction center of the accommodating space and a shortest distance between the second side surface and the center are equal to each other in a car width direction.
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公开(公告)号：US10899372B2
公开(公告)日：2021-01-26
申请号：US16065823
申请日：2016-11-29
发明人： Yukitaka Taga , Fumikazu Kounoike , Yukihiro Sano , Takaya Ono
摘要： A railcar bogie includes: a cross beam supporting a carbody of a railcar; an axle box including a bearing accommodating portion accommodating a bearing rotatably supporting a wheelset; a plate spring extending in a car longitudinal direction while supporting a car width direction end portion of the cross beam; and a receiving member provided above the axle box and supporting a car longitudinal direction end portion of the plate spring, an attachment hole being formed at a car longitudinal direction outside portion of the receiving member, a lifting fitting used to lift the bogie being attached to the attachment hole.
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公开(公告)号：US10850749B2
公开(公告)日：2020-12-01
申请号：US16482186
申请日：2018-01-16
发明人： Yoshihiro Tamura , Yukitaka Taga , Fumikazu Kounoike , Takaya Ono
摘要： An axle box suspension includes: a coupler extending from an axle box in a car longitudinal direction and including a tubular portion at an end portion of the coupler, the tubular portion being open toward both sides in a car width direction; a core rod inserted into an internal space of the tubular portion, a pair of protruding portions being provided at both sides of the core rod in the car width direction; an elastic body interposed between the tubular portion and the core rod; a pair of receiving seats provided at the bogie frame and including a pair of groove portions which are open toward the car width direction and an upper side; a pair of lids pressing, from above, the pair of protruding portions fitted into the pair of groove portions from above; and fasteners fixing the lids to the receiving seats.
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公开(公告)号：US10710614B2
公开(公告)日：2020-07-14
申请号：US16065865
申请日：2016-11-29
发明人： Yukitaka Taga , Fumikazu Kounoike , Yukihiro Sano , Takaya Ono
摘要： A wheel load adjusting tool includes at least one liner interposed between an axle box and a spring directly or indirectly supported by the axle box, the liner including: a pressure receiving portion configured to receive a load applied from the spring; a first engaging portion formed by recessing a part of an outer edge of the pressure receiving portion inward, the first engaging portion engaging with a first engaged portion to restrict the liner from being displaced with respect to the axle box, the first engaged portion projecting from an upper surface of the axle box; and a second engaging portion projecting outward from the pressure receiving portion at an opposite side of the first engaging portion, the second engaging portion engaging with a second engaged portion of the axle box to restrict the liner from being displaced and rotated with respect to the axle box.
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