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公开(公告)号：US20230033401A1
公开(公告)日：2023-02-02
申请号：US17882853
申请日：2022-08-08
申请人： Jilin University
发明人： Junnian WANG , Ruihao FAN , Haolun GU , Kefu ZHU , Dongxu FU , Shuo ZHUANG
摘要： An electric multi-mode steer-by-wire system and a mode switching method thereof. The electric multi-mode steer-by-wire system includes a steering hand wheel unit including a steering hand wheel, a road-feeling motor, a reducer and an electromagnetic clutch, a steering execution unit including two steering electric motor mechanisms, a steering gear and two steering road wheels, an electronic control unit configured to control the steering hand wheel unit and the steering execution unit to achieve switching among two-side steering-road-wheel independent steer-by-wire mode, steering-trapezoidal steer-by-wire mode and electric power steering mode, and a mode selection and display unit. The electromagnetic clutch connected to the steering execution unit. The steering electric motor mechanisms drive the steering road wheels to steer independently through lead screw-nut pairs; or respectively form a hydraulic cylinder with the steering gear to jointly or independently drive the steering road wheels to steer with steering-trapezoidal manner.
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公开(公告)号：US20230145223A1
公开(公告)日：2023-05-11
申请号：US18064681
申请日：2022-12-12
申请人： Jilin University
发明人： Junnian WANG , Dongxu FU , Shuo ZHUANG , Kefu ZHU , Chunlin ZHANG
CPC分类号： B62D5/043 , B62D5/0421 , B62D7/1581
摘要： A dual-mode active rear-wheel steering device, including: a steering angle control motor, a speed-reduction mechanism, a differential mechanism assembly, two steering motion conversion mechanisms, a first electromagnetic clutch and a second electromagnetic clutch. An output end of the steering angle control motor is connected to the speed-reduction mechanism. The differential mechanism assembly is a bevel gear differential, in which center holes at outer ends a two half shafts are respectively provided with a raceway to form an inner cyclical ball-lead screw-nut pair with a first lead screw and a second lead screw of the steering motion conversion mechanisms. The first lead screw and the second lead screw are the same in parameters but with opposite rotation direction. The first electromagnetic clutch controls connection between a differential housing and a frame. The second electromagnetic clutch controls connection between the differential housing and the second half shaft.
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