公开(公告)号：US06543569B1

公开(公告)日：2003-04-08

申请号：US09680699

申请日：2000-10-06

Applicant: Yasuo Shimizu ,  Yasuharu Ohyama ,  Katsuji Watanabe ,  Shigeru Yamawaki ,  Atsuhiko Yoneda ,  Yasuhiro Terada

Inventor： Yasuo Shimizu ,  Yasuharu Ohyama ,  Katsuji Watanabe ,  Shigeru Yamawaki ,  Atsuhiko Yoneda ,  Yasuhiro Terada

IPC: B62D504

CPC classification number: F16H55/26 ,  B21K1/767 ,  B62D3/123 ,  B62D3/126 ,  B62D5/04 ,  B62D5/0421 ,  F16H55/08 ,  F16H55/285 ,  Y10T74/1906 ,  Y10T74/19953

Abstract: An electric power steering apparatus comprising a rack shaft having two racks, a first rack-and-pinion mechanism for transferring a steering torque to the rack shaft, and a second rack-and-pinion mechanism for transferring an assist torque to the rack shaft. The second rack-and-pinion mechanism includes a pinion and a rack both being helical gears so that a large torque can be transmitted to the rack shaft. Teeth of the pinion and rack are arc profiled. The arc profiled teeth mesh with each other through a large contact area of concave and convex surfaces thereof and hence with a reduced contact pressure compared to involute profiled teeth. The arc profiled teeth thus have increased surface fatigue strength, bending strength and bending fatigue strength and can transmit an assist torque sufficiently to the rack shaft. Moreover, they have durability sufficient to withstand a torque load of a motor inertia.

Abstract translation: 一种电动助力转向装置，包括具有两个齿条的齿条轴，用于将转向转矩传递到齿条轴的第一齿条和小齿轮机构，以及用于将辅助转矩传递到齿条轴的第二齿条齿轮机构。 第二齿条齿轮机构包括小齿轮和齿条，两者都是斜齿轮，从而能够将大的扭矩传递到齿条轴。 小齿轮和齿条的牙齿呈弧形。 弧形牙齿通过其凹凸表面的大的接触面彼此啮合，因此与渐开线成型齿相比具有降低的接触压力。 因此，弧形牙齿具有增加的表面疲劳强度，弯曲强度和弯曲疲劳强度，并且可以将足够的辅助扭矩传递到齿条轴。 此外，它们具有足以承受电动机惯性的转矩负载的耐久性。

公开(公告)号：US4531603A

公开(公告)日：1985-07-30

申请号：US569184

申请日：1984-01-09

Applicant: Kenneth L. VanCise, Jr.

Inventor： Kenneth L. VanCise, Jr.

IPC: B62D3/12 ,  B62D5/22 ,  B62D5/06

CPC classification number: F16C29/0616 ,  B62D3/123 ,  B62D5/22 ,  F16C29/002 ,  F16H55/285 ,  Y10T74/1967

Abstract: Rack and pinion steering gear in which an adjustable preloaded rack bearing carries an endless train of balls which are fed into and out of a linear track in the rack. With this ball train interconnection, the sliding friction between the rack and rack bearing is reduced while rack rotation from torque loads is prevented.

Abstract translation: 齿条和小齿轮转向装置，其中可调节的预加载的齿条轴承承载馈送进入和退出机架中的线性轨道的圆珠球。 通过这种球列互连，减少了齿条和齿条轴承之间的滑动摩擦，防止了转矩负载的齿条转动。

公开(公告)号：US3421387A

公开(公告)日：1969-01-14

申请号：US3421387D

申请日：1966-05-04

Applicant: CAM GEARS LTD

Inventor： ADAMS FREDERICK JOHN

IPC: B62D3/12 ,  F16H55/28 ,  F16H57/12 ,  B62D1/20

CPC classification number: F16H55/283 ,  B62D3/123 ,  F16H55/285

公开(公告)号：US20140007716A1

公开(公告)日：2014-01-09

申请号：US13932466

申请日：2013-07-01

Applicant: JTEKT CORPORATION

Inventor： Hideo KOMETANI

IPC: F16H19/04

CPC classification number: F16H19/04 ,  B62D3/123 ,  F16H55/283 ,  F16H55/285 ,  Y10T74/18096 ,  Y10T74/19623 ,  Y10T74/1967

Abstract: A rack shaft supporting device includes a support yoke, a plug that closes the other opening of an accommodation chamber, a ball screw mechanism between the support yoke and the plug, and a torsion urging member between the ball screw mechanism and the plug. The ball screw mechanism includes: a first threaded portion in which a first thread groove is formed; a second threaded portion in which a second thread groove is formed; and balls arranged in a rolling path formed of the first thread groove and the second thread groove. The torsion urging member rotates the second threaded portion relative to the plug and moves the second threaded portion toward the support yoke.

Abstract translation: 齿条轴支撑装置包括支撑轭，闭合容纳室的另一个开口的塞子，支撑轭和插塞之间的滚珠丝杠机构，以及滚珠丝杠机构和插头之间的扭转推动构件。 滚珠丝杠机构包括：第一螺纹部，其中形成有第一螺纹槽; 第二螺纹部分，其中形成有第二螺纹槽; 以及布置在由所述第一螺纹槽和所述第二螺纹槽形成的滚动路径中的滚珠。 扭力推动构件使第二螺纹部分相对于插头旋转，并将第二螺纹部分朝支撑轭移动。

公开(公告)号：US20060157294A1

公开(公告)日：2006-07-20

申请号：US11318537

申请日：2005-12-28

Applicant: Seiji Ueno ,  Kazuo Chikaraishi

Inventor： Seiji Ueno ,  Kazuo Chikaraishi

IPC: B62D5/04

CPC classification number: F16H55/283 ,  B62D3/123 ,  F16H55/285

Abstract: Due to the meshing of the gears, the following force works on the rack. A separating force (Fα) determined by a pressure angle of gears, a lateral force (Fβ) determined by an angle of torsion of the rack, and drag (Fr) for offsetting angular moment occurring in the rack due to the lateral force (Fβ). A resultant (F) of the force works from the rack on the rack guide. When the line of this resultant (F) is held on the “inner side” of the end portions of the needle bearing 25 in this rolling type rack guide 21, the rotation of the roller 22 becomes stable.

Abstract translation: 由于齿轮的啮合，以下力在机架上工作。 由齿轮的压力角确定的分离力（Falpha），由齿条的扭转角度确定的横向力（Fbeta）以及由于侧向力而产生在齿条中的角力矩的阻力（Fr）（Fbeta ）。 力的结果（F）从机架导轨上的机架工作。 当该结果（F）的线被保持在该滚动型齿条引导件21中的滚针轴承25的端部的“内侧”上时，辊22的旋转变得稳定。

公开(公告)号：US20060108759A1

公开(公告)日：2006-05-25

申请号：US10525209

申请日：2003-05-30

Applicant: Noboru Nishiko

Inventor： Noboru Nishiko

IPC: B62D3/12

CPC classification number: F16H55/283 ,  B62D3/12 ,  B62D3/123 ,  F16H55/285 ,  Y10T74/1967 ,  Y10T74/19819

Abstract: A rack shaft (110) has a rolling contact surface (110b) on the opposite side of rack teeth (110a) across an axis line X, and a pair of slanted surfaces (110c, 110c) extending in parallel with the axis line across the rolling contact surface (110b). Furthermore, a roller (123) rolling on the rolling contact surface (110b) of the rack shaft (110) and an urging member (130) having contact with the pair of slanted surfaces (110c, 110c) for applying an urging force are provided. The urging member (130) is attached to the housing (101), forms an annular configuration surrounding the entire circumference of the rack shaft (110), and has contact portions (130b, 130b) having contact with the pair of slanted surfaces (110c, 110c) to apply the urging force. Therefore, the force exerted on the rack shaft (110) by a pinion (103a) can be supported by a cylindrical roller (123) contacting with the rolling contact surface (110b). Moreover, it is possible to restrain a rotational displacement of the rack shaft (110) about the axis line by applying the urging force against the pair of slanted surfaces (110c, 110c) of the rack shaft (110) by the contacting portions (130b, 130b) of the urging member (130). Also, since the urging member (130) has an annular configuration, it is advantageously possible to easily attach or detach the urging member (130) to or from the housing (101) without using a connecting member such as adhesive or a screw.

Abstract translation: 齿条轴（110）在齿条齿（110a）的相对侧穿过轴线X具有滚动接触表面（110b），以及一对倾斜表面（110c，110c），其与 轴线穿过滚动接触表面（110b）。 此外，在所述齿条轴（110）的滚动面（110b）上滚动的滚子（123）和与所述一对倾斜面（110c，110c）接触的施力构件（130c） 提供力量。 推动构件（130）附接到壳体（101），形成围绕齿条轴（110）的整个圆周的环形构造，并且具有与一对倾斜表面接触的接触部分（130b，130b） （110c，110c）以施加推动力。 因此，由小齿轮（103a）施加在齿条轴（110）上的力可以由与滚动接触面（110b）接触的圆柱滚子（123）支撑。 此外，可以通过对齿条轴（110）的一对倾斜面（110c，110c）施加施力而通过接触部分来限制齿条轴（110）绕轴线的旋转位移 （130b，130b）。 此外，由于推动构件（130）具有环形构造，所以有利地可以在不使用诸如粘合剂或螺钉的连接构件的情况下容易地将推动构件（130）附接或从壳体（101）拆卸。

公开(公告)号：US20050257634A1

公开(公告)日：2005-11-24

申请号：US10519787

申请日：2003-06-18

Applicant: Kenji Someya ,  Takeharu Saeki

Inventor： Kenji Someya ,  Takeharu Saeki

IPC: B62D3/12 ,  F16H19/04 ,  F16H55/28 ,  B62D5/04

CPC classification number: B62D3/12 ,  B62D3/123 ,  B62D3/126 ,  F16H55/283 ,  F16H55/285 ,  Y10T74/19623 ,  Y10T74/1967

Abstract: A rack shaft (110) is formed with a rolling face (110c) narrower than a face width of rack teeth (110a) on the opposite side with an axis line X of the rack shaft being interposed therebetween, and formed with a pair of oblique faces (110b) on both sides with the rolling face (110c) being interposed therebetween, there are further provided a cylindrical roller (123) rolling on the rolling face (110c) of the rack shaft (110) and a support device (120) pressing the cylindrical roller (123) toward the rack shaft (110), and hence the cylindrical roller (123) rolls on the rolling face (110c) when a steering force is transmitted to the rack shaft (110) from a pinion (103a), thereby making it possible to allow a movement of the rack shaft (110) in an axis-line direction with a smaller resisting force.

Abstract translation: 齿条轴（110）形成有比齿条轴的轴线X相对的齿条齿（110a）的面宽窄的滚动面（110c），并且形成为一对 在两侧的倾斜面（110b）之间插入有滚动面（110c），还设置有在齿条轴（110）的滚动面（110c）上滚动的圆柱滚子（123）和 支撑装置（120）朝向齿条轴（110）挤压圆柱滚子（123），因此当转向力传递到齿条轴（110）时，圆柱滚子（123）滚动在滚动面（110c）上， 从而能够以较小的阻力沿轴线方向移动齿条轴110。

公开(公告)号：US06539821B2

公开(公告)日：2003-04-01

申请号：US09803212

申请日：2001-03-09

Applicant: Mark J. Bugosh

Inventor： Mark J. Bugosh

IPC: F16H104

CPC classification number: B62D3/123 ,  F16H55/283 ,  F16H55/285 ,  Y10T74/1967

Abstract: A rack and pinion steering gear (10) comprises a housing (12). A yoke assembly (40) is in the housing (12) for at least partially supporting and guiding movement of a rack bar (34) relative to a pinion gear (26). The yoke assembly (40) comprises a yoke (42) and a plurality of rotatable members. The yoke (42) has a first end surface (48) and an axis (A) that extends transverse to the direction of movement of the rack bar (34). Each of the plurality of rotatable members is supported by the yoke (42). A portion of each rotatable member projects outward of the first end surface (48) of the yoke (42) for contacting the rack bar (34). Each rotatable member is rotatable about its axis and is fixed against movement along the yoke axis (A) relative to the yoke (42).

Abstract translation: 齿条齿条转向齿轮（10）包括壳体（12）。 轭架组件（40）在壳体（12）中，用于至少部分地支撑和引导齿条（34）相对于小齿轮（26）的运动。 轭组件（40）包括轭（42）和多个可旋转构件。 轭（42）具有第一端面（48）和横向于齿条（34）的运动方向延伸的轴线（A）。 多个可旋转构件中的每一个由轭（42）支撑。 每个可旋转构件的一部分突出于轭架（42）的第一端面（48）的外侧，用于接触齿条（34）。 每个可旋转构件可以围绕其轴线旋转并且被固定成抵抗相对于轭架（42）的偏转轴线（A）的移动。

公开(公告)号：US20020152825A1

公开(公告)日：2002-10-24

申请号：US09839913

申请日：2001-04-20

Applicant: TRW Inc.

Inventor： Bobby Joe Adams ,  Scott C. Little

IPC: F16H001/04

CPC classification number: B62D3/123 ,  F16H55/283 ,  F16H55/285 ,  Y10T74/19623 ,  Y10T74/1967

Abstract: A rack and pinion steering gear (10) comprises a housing (12) having an axially extending passage (14) and a yoke bore (18) that intersects the axially extending passage (14) within the housing (12). A pinion gear (26) is rotatably mounted in the housing (12). A rack bar (34) extends through the axially extending passage (14) and is movable relative to the pinion gear (26). The rack bar (34) has teeth in meshing engagement with teeth (32) of the pinion gear (26). A yoke assembly (54) is located in the yoke bore (18) of the housing (12) for at least partially supporting and guiding movement of the rack bar (34) relative to the pinion gear (26). The yoke assembly (54) comprises a yoke (56) having first and second roller assemblies (154 and 166) for contacting the rack bar (34) and rotating during movement of the rack bar (34). A first spindle (112) is fixed to the yoke (56) and supports the first roller assembly (154) and a second spindle (114) is fixed to the yoke (56) and supports the second roller assembly (166).

Abstract translation: 齿条和小齿轮转向齿轮（10）包括具有轴向延伸通道（14）的壳体（12）和与壳体（12）内的轴向延伸通道（14）相交的轭孔（18）。 小齿轮（26）可旋转地安装在壳体（12）中。 齿条（34）延伸穿过轴向延伸的通道（14）并且可相对于小齿轮（26）移动。 齿条（34）具有与小齿轮（26）的齿（32）啮合的齿。 轭组件（54）位于壳体（12）的轭孔（18）中，用于至少部分地支撑和引导齿条（34）相对于小齿轮（26）的运动。 磁轭组件（54）包括具有用于接触齿条（34）并在齿条（34）的运动期间旋转的第一和第二辊组件（154和166）的轭架（56）。 第一主轴（112）固定到轭架（56）并支撑第一辊组件（154），第二主轴（114）固定到轭架（56）并支撑第二辊组件（166）。

公开(公告)号：US5058448A

公开(公告)日：1991-10-22

申请号：US426353

申请日：1989-10-25

Applicant: Masanori Kiyooka ,  Etsuro Kitami ,  Shigehiko Sakaguchi ,  Katsuya Takeuchi

Inventor： Masanori Kiyooka ,  Etsuro Kitami ,  Shigehiko Sakaguchi ,  Katsuya Takeuchi

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

CPC classification number: B62D3/123 ,  F16H55/283 ,  F16H55/285 ,  Y10S384/909 ,  Y10T74/1967

Abstract: A support yoke pressed against a rack bar to preload the rack relative to a pinion has a roller for guiding the rack bar by contact therewith. A plate of synthetic resin is interposed between each end face of the roller and the roller mount portion of the support yoke opposed thereto.