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公开(公告)号：US12122460B2
公开(公告)日：2024-10-22
申请号：US17430136
申请日：2019-03-29
申请人： HITACHI ASTEMO, LTD.
发明人： Satoshi Enomoto , Hiroshi Fujita
CPC分类号： B62D3/08 , B62D5/04 , F16H25/2214 , F16H2025/2062 , F16H2025/2081
摘要： A ball screw device includes a screw shaft, a plurality of balls, a nut, a pair of guide members, and a transmission member. The nut has a pair of large-diameter portions and a small-diameter part between the two large-diameter portions. The two guide members are attachable to and detachable from an outer circumferential surface of the small-diameter portion in a radial direction and are located with a certain gap in the outer circumferential direction of the small-diameter portion. A fitting portion of the transmission member fits over the two large-diameter portions such that the fitting portion covers the two guide members while restricting radially outward displacements thereof. The fitting portion works with the small-diameter portion and the two guide members to define a circulation passage through which the balls are circulated. The transmission member is coupled to the nut.
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公开(公告)号：US20220097752A1
公开(公告)日：2022-03-31
申请号：US17430136
申请日：2019-03-29
申请人： HITACHI ASTEMO, LTD.
发明人： Satoshi Enomoto , Hiroshi Fujita
摘要： A ball screw device includes a screw shaft, a plurality of balls, a nut, a pair of guide members, and a transmission member. The nut has a pair of large-diameter portions and a small-diameter part between the two large-diameter portions. The two guide members are attachable to and detachable from an outer circumferential surface of the small-diameter portion in a radial direction and are located with a certain gap in the outer circumferential direction of the small-diameter portion. A fitting portion of the transmission member fits over the two large-diameter portions such that the fitting portion covers the two guide members while restricting radially outward displacements thereof. The fitting portion works with the small-diameter portion and the two guide members to define a circulation passage through which the balls are circulated. The transmission member is coupled to the nut.
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公开(公告)号：US11904949B2
公开(公告)日：2024-02-20
申请号：US17925906
申请日：2020-06-16
申请人： Hitachi Astemo, Ltd.
发明人： Satoshi Enomoto
CPC分类号： B62D3/126 , F16H19/04 , F16H2019/046
摘要： A vehicular steering device includes a turning shaft, a housing storing therein the turning shaft, a stopper provided at a shaft end of the turning shaft, and an annular elastic body. An opening of the housing is formed in a U-shaped cross-sectional shape and in an annular shape opened toward the stopper by an external cylinder portion and an internal cylinder portion. The elastic body includes a first elastic portion and a second elastic portion. The first elastic portion is supported by an inner circumferential surface of the external cylinder portion and the bottom surface, and is provided with a first clearance from an outer circumferential surface of the internal cylinder portion. The second elastic portion extends toward the stopper from the first elastic portion, and is provided with a second clearance larger than the first clearance from the inner circumferential surface of the external cylinder portion.
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公开(公告)号：US20230119362A1
公开(公告)日：2023-04-20
申请号：US17911800
申请日：2020-10-09
申请人： Hitachi Astemo, Ltd.
发明人： Satoshi Enomoto , Hiroaki Mori , Hiroshi Fujita
摘要： A steering apparatus includes a turning shaft movable in a vehicle widthwise direction, a pinion shaft meshed with the turning shaft and a first housing that retains therein the turning shaft and the pinion shaft. An inner circumferential surface of the first housing facing with the turning shaft is provided with an inclined portion that continuously changes an internal diameter. When a portion where a tooth of the turning shaft and a tooth of the pinion shaft are meshed with each other is defined as a meshed portion, the inclined portion is formed below at least the meshed portion.
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公开(公告)号：US20230182804A1
公开(公告)日：2023-06-15
申请号：US17925906
申请日：2020-06-16
申请人： Hitachi Astemo, Ltd.
发明人： Satoshi Enomoto
CPC分类号： B62D3/126 , F16H19/04 , F16H2019/046
摘要： A vehicular steering device includes a turning shaft, a housing storing therein the turning shaft, a stopper provided at a shaft end of the turning shaft, and an annular elastic body. An opening of the housing is formed in a U-shaped cross-sectional shape and in an annular shape opened toward the stopper by an external cylinder portion and an internal cylinder portion. The elastic body includes a first elastic portion and a second elastic portion. The first elastic portion is supported by an inner circumferential surface of the external cylinder portion and the bottom surface, and is provided with a first clearance from an outer circumferential surface of the internal cylinder portion. The second elastic portion extends toward the stopper from the first elastic portion, and is provided with a second clearance larger than the first clearance from the inner circumferential surface of the external cylinder portion.
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公开(公告)号：US20230133693A1
公开(公告)日：2023-05-04
申请号：US17912208
申请日：2020-04-10
申请人： Hitachi Astemo, Ltd.
发明人： Satoshi Enomoto , Hiroaki Mori , Hiroshi Fujita
摘要： A steering apparatus includes a turning shaft movable in the vehicle widthwise direction, a pinion shaft meshed with the turning shaft, a first housing that retains therein the turning shaft and the pinion shaft, a ball screw that transmits drive force generated by a drive source to the turning shaft, and a second housing that retains therein the ball screw. A retaining portion capable of storing water is provided at an inner circumferential surface of the second housing. A lower end surface of the retaining portion is located below at least a lower end surface of the ball screw. A first end portion of the retaining portion in the axial direction of the turning shaft is located between a belt member that links the ball screw with the drive source and a rack end stopper at the drive-source side.
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