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公开(公告)号：US10557506B2
公开(公告)日：2020-02-11
申请号：US15782344
申请日：2017-10-12
摘要： A dog clutch includes a rotating member including first dog teeth, an annular dog ring including second dog teeth, and an annular dog sleeve. The rotating member includes first protrusions protruding radially outwardly from the outer circumferences of crests or troughs of the first dog teeth, the dog sleeve includes second protrusions that are configured to come into contact with the first protrusions in a circumferential direction when the dog sleeve moves toward the rotating member in an axial direction, and the first dog teeth and the second dog teeth are disposed at positions at which the first dog teeth and the second dog teeth are able to be engaged with each other in the circumferential direction in a state in which the first protrusions and the second protrusions are in contact with each other.
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公开(公告)号：US20190301605A1
公开(公告)日：2019-10-03
申请号：US16358103
申请日：2019-03-19
发明人： Tomoyasu Kurimoto , Akihiko Ichikawa , Shinichi Takeuchi , Jun Yabuta , Yuki Masui , Takeshi Yano
摘要： A control apparatus for a vehicle transmission that includes: transmission gears disposed on a shaft; a switching mechanism which is to be switched between a connecting state in which one of the transmission gears is rotatable integrally with the shaft and a disconnecting state in which the one of the transmission gears is rotatable relative to the shaft; a shift fork for axially moving the switching mechanism; and a shift barrel to be rotated to position the shift fork. The switching mechanism includes first and second rings and an elastic member which is disposed between the first and second rings in the axial direction and connects the first and second rings. The control apparatus determines that a failure occurs in the vehicle transmission, when a value related to a reaction force that acts on the shift barrel during rotation of the shift barrel is deviated from a predetermined range.
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公开(公告)号：US10883547B2
公开(公告)日：2021-01-05
申请号：US16334488
申请日：2018-01-30
发明人： Isamu Shiotsu , Shinichi Takeuchi , Akihiko Ichikawa , Junichi Muraoka , Tomohiro Yoshimura , Jun Yabuta , Yuuki Masui
摘要： A dog clutch includes a gear (40) mounted on a power transmission shaft (30), first and second dog rings (10, 20), a fork (60), springs (65), and cam grooves (31). The cam grooves (31) each include a first slope surface (36) inclined from the axial direction toward the positive rotation direction as the first slope surface (36) approaches the gear (40) and a second parallel surface (37) parallel to the axial direction. The first dog ring (10) includes first cam protrusions (16) to be engaged with the respective first slope surfaces (36), and the second dog ring (20) includes second cam protrusions (26) to be engaged with the respective second parallel surfaces (37). This structure prevents the dog rings and the fork from coming into contact with each other, thereby avoiding generation of abrasion and increasing the transmission efficiency.
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公开(公告)号：US10859139B2
公开(公告)日：2020-12-08
申请号：US15705380
申请日：2017-09-15
发明人： Tomohiro Yoshimura , Shinichi Takeuchi , Akihiko Ichikawa , Jun Yabuta , Klemens Pollmeier , Lars Van Leeuwen , Andree Miller , Patrizio Agostinelli
IPC分类号： F16H3/097 , F16H3/00 , F16H61/688 , F16D11/14 , F16D21/04 , F16D23/02 , F16H63/30 , F16H3/093 , F16H3/08
摘要： A vehicle transmission has a plurality of gear positions that are to be selectively established, and includes: an input shaft; a first shaft; a second shaft; an output shaft; at least one first drive gear disposed on the first shaft; at least one second drive gear disposed on the second shaft; at least one driven gear disposed on the output shaft; a dog clutch connecting and disconnecting between the input shaft and each of the first and second shafts; and a synchronous meshing apparatus. The synchronous meshing apparatus connects and disconnects between each of the first and second shafts and the output shaft, and, when connecting between each of the first and second shafts and the output shaft, establishes a power transmission path from each of the first and second shafts to the output shaft via a selected one of the at least one first or second drive gear.
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公开(公告)号：US10738886B2
公开(公告)日：2020-08-11
申请号：US15704843
申请日：2017-09-14
发明人： Shinichi Takeuchi , Akihiko Ichikawa , Junichi Muraoka , Kotaro Hoshihara , Tomohiro Yoshimura , Jun Yabuta , Klemens Pollmeier , Lars Van Leeuwen , Andree Miller
摘要： A first dog ring and a second dog ring are biased toward each other by means of springs. When the first dog ring and the second dog ring are moved away from each other, bias force produced by the springs is applied to the second dog ring in a direction to draw the second dog ring toward the first dog ring. Accordingly, when the first dog ring is moved away from the second dog ring during shifting, the second dog ring is drawn toward the first dog ring under the bias force, and third engaging teeth of the second dog ring and meshing teeth of a first-speed gear are promptly disengaged from each other.
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公开(公告)号：US10711895B2
公开(公告)日：2020-07-14
申请号：US16358103
申请日：2019-03-19
发明人： Tomoyasu Kurimoto , Akihiko Ichikawa , Shinichi Takeuchi , Jun Yabuta , Yuki Masui , Takeshi Yano
IPC分类号： F16H61/12 , F16H63/50 , F16H61/02 , F16H63/18 , B60W10/11 , F16D11/10 , F16D11/14 , F16H3/091 , F16H63/30 , F16H55/17
摘要： A control apparatus for a vehicle transmission that includes: transmission gears disposed on a shaft; a switching mechanism which is to be switched between a connecting state in which one of the transmission gears is rotatable integrally with the shaft and a disconnecting state in which the one of the transmission gears is rotatable relative to the shaft; a shift fork for axially moving the switching mechanism; and a shift barrel to be rotated to position the shift fork. The switching mechanism includes first and second rings and an elastic member which is disposed between the first and second rings in the axial direction and connects the first and second rings. The control apparatus determines that a failure occurs in the vehicle transmission, when a value related to a reaction force that acts on the shift barrel during rotation of the shift barrel is deviated from a predetermined range.
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公开(公告)号：US10920877B2
公开(公告)日：2021-02-16
申请号：US15795598
申请日：2017-10-27
发明人： Shinichi Takeuchi , Akihiko Ichikawa , Tomohiro Yoshimura , Tomomitsu Terakawa , Jun Yabuta , Klemens Pollmeier , Lars van Leeuwen , Andree Miller , Patrizio Agostinelli
摘要： A control apparatus for a vehicular transmission including at least one dog clutch each having a first dog member mounted on a first shaft such that the first dog member is rotated together with the first shaft, and at least one second dog member each mounted to be axially adjacent to the first dog member and rotatable relative to the first shaft, first gears each mounted to be rotatable relative to the first shaft and provided with the second dog member, second gear which are mounted such that the second gears are rotated together with a second shaft parallel to the first shaft, and which mesh with the respective first gears, and a shifting mechanism for selectively placing each dog clutch in an engaged or released state. The control apparatus includes: a first calculating portion for detecting to a rotary angular position of the first shaft, and calculating a rotary angular position of the first dog member on the basis of the detected rotary angular position of the first shaft; a second calculating portion for detecting a rotary angular position of the second shaft, and calculating a rotary angular position of each second dog member on the basis of the detected rotary angular position of the second shaft; and an engagement control portion for controlling the shifting mechanism on the basis of the rotary angular positions of the first and second dog members, for engagement of the first and second dog members with each other.
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公开(公告)号：US10788125B2
公开(公告)日：2020-09-29
申请号：US15704843
申请日：2017-09-14
发明人： Shinichi Takeuchi , Akihiko Ichikawa , Junichi Muraoka , Kotaro Hoshihara , Tomohiro Yoshimura , Jun Yabuta , Klemens Pollmeier , Lars Van Leeuwen , Andree Miller
摘要： A first dog ring and a second dog ring are biased toward each other by means of springs. When the first dog ring and the second dog ring are moved away from each other, bias force produced by the springs is applied to the second dog ring in a direction to draw the second dog ring toward the first dog ring. Accordingly, when the first dog ring is moved away from the second dog ring during shifting, the second dog ring is drawn toward the first dog ring under the bias force, and third engaging teeth of the second dog ring and meshing teeth of a first-speed gear are promptly disengaged from each other.
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公开(公告)号：US10066747B2
公开(公告)日：2018-09-04
申请号：US15240604
申请日：2016-08-18
摘要： A transmission includes a gear shift set including a shift gear and a switching mechanism, and another gear shift set including a shift gear and a switching mechanism. At a side face of the lower shift gear, dogs are provided to protrude. The switching mechanism includes a first ring configured to rotate integrally with a shaft, a second ring configured to rotate integrally with the first ring, and an elastic member connecting the first ring and the second ring. The first ring includes first projection portions, and a first abutment portion allowing a shift member to abut thereon. The second ring includes second projection portions, and a second abutment portion allowing the shift member to abut thereon.
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