公开(公告)号：US5983742A

公开(公告)日：1999-11-16

申请号：US18863

申请日：1998-02-05

申请人： Christopher J. Morris ,  Kazuo Kato ,  Vernon H. Bryant

发明人： Christopher J. Morris ,  Kazuo Kato ,  Vernon H. Bryant

IPC分类号： B62D3/12 ,  F16H55/28 ,  F16H57/12

CPC分类号： F16H55/283 ,  B62D3/123 ,  F16H55/285 ,  Y10T74/1967

摘要： A steering gear for a motor vehicle includes a housing, a rack bar, a pinion, a support yoke, a spring, a split roller, and a plurality of bearings. The rack bar is slidably supported within the housing for transverse displacement therein along an axis. The rack bar has teeth on a first side. The pinion has teeth drivingly engaging the teeth of the rack bar. The pinion is rotatably supported within the housing. Rotation of the pinion transversely displaces the rack bar along the axis. The support yoke is slidably disposed in the housing for movement toward a side of the rack bar substantially opposite the teeth of the rack bar. The support yoke has an opening which is open toward the rack bar, with the opening defining two opposed bearing surfaces. The spring is disposed between the housing and the support yoke, and biases the support yoke toward the rack bar. The split roller includes a first split roller section and a second split roller section. The first split roller section is substantially conical in shape and has a large diameter side located proximate to one of the bearing surfaces. The first split roller section is rotatably disposed on and axially slidable toward the one of the bearing surfaces and tangentially engages the rack bar. The second split roller section is also substantially conical in shape with a large diameter side located proximate to an other of the bearing surfaces. The second split roller section is rotatably disposed on and axially slidable toward the other of the bearing surfaces and tangentially engages the rack bar. Low friction radial bearings are disposed between the dowel pins and the roller sections. Low friction thrust bearings are axially disposed between the roller sections and the bearing surfaces of the support yoke. The spring acts against the support yoke to press the roller sections against the rack bar, causing the rollers to separate from each other and thereby defining a gap therebetween and pressing the washers against the bearing surfaces of the support yoke.