公开(公告)号：US20040244519A1

公开(公告)日：2004-12-09

申请号：US10493397

申请日：2004-04-22

Inventor： Daisaku Kawata ,  Minao Umeda

IPC: F16H025/22

CPC classification number: F16H25/2214 ,  F16H2025/2043 ,  Y10T74/18576 ,  Y10T74/19744 ,  Y10T74/19749

Abstract: The invention provides a ball screw device having high strength against a repetitive load and improved durability, which is assembled in an electric actuator, by absorbing a bending force by a simple method and making loads in the axial direction uniformly act on balls constructing the ball screw device. In the ball screw device, a ball nut is slid in the axial direction by rotation of a ball screw shaft to convert rotational motion of a motor to linear motion. An outer peripheral surface of the ball screw shaft and an inner peripheral surface of the ball nut are made in contact with each other, balls are disposed between the ball screw shaft and the ball nut, and openings at both ends of a circulating tube for circulating the balls in the device are disposed so as to be off from heavy load regions in which a load heavier than loads in other portions among loads acting on the balls is applied, thereby absorbing a bending force applied to the ball screw device.

Abstract translation: 本发明提供了一种滚珠丝杠装置，其通过简单的方法吸收弯曲力并且使轴向均匀地作用于构成滚珠丝杠的滚珠上，对组装在电致动器中的重复载荷和改善的耐久性具有高强度 设备。 在滚珠丝杠装置中，滚珠螺母通过滚珠丝杠轴的旋转沿轴向滑动，以将马达的旋转运动转换成线性运动。 滚珠丝杠轴的外周面和滚珠螺母的内周面彼此接触，滚珠设置在滚珠丝杠轴和滚珠螺母之间，并且循环管的两端的开口用于循环 装置中的球配置成从施加在作用于球的负荷中的负载比其他部分重的负荷的重负荷区域脱离，从而吸收施加到滚珠丝杠装置的弯曲力。

公开(公告)号：US20040083840A1

公开(公告)日：2004-05-06

申请号：US10287404

申请日：2002-11-04

Inventor： David E. King ,  Eric D. Pattok ,  Thomas J. Bucholz ,  Raghunath P. Khetan

IPC: F16H025/22

CPC classification number: F16H25/2214 ,  F16H25/2228 ,  Y10T74/19763 ,  Y10T74/19767

Abstract: A ball screw assembly includes a ball nut or a ball screw having internal or external, respectively, helical curves, wherein two adjacent turns of the helical curves are joined by a crossover/crossunder path, wherein ends of the crossover/crossunder path and ends of the helical curves are integrally joined without interruption. A ball screw assembly may further include crossover/crossunder paths which are staggered about the screw or the nut.

Abstract translation: 滚珠丝杠组件包括具有分别具有内部或外部的螺旋曲线的滚珠螺母或滚珠丝杠，其中两个相邻的螺旋曲线的匝通过交叉/横向路径连接，其中交叉/横向路径的端部和 螺旋曲线整体连接而不中断。 滚珠丝杠组件可以进一步包括交叉/横向路径，其围绕螺钉或螺母交错。

公开(公告)号：US20040069081A1

公开(公告)日：2004-04-15

申请号：US10269109

申请日：2002-10-10

Inventor： Patrick Clint ,  Bryce J. Bulthaus ,  Stephen Caronna

IPC: F16H025/22

CPC classification number: F16H25/2204 ,  F16H25/2472 ,  F16H2025/2242 ,  Y10T74/18576 ,  Y10T74/18712 ,  Y10T74/19721 ,  Y10T74/19744 ,  Y10T74/19749

Abstract: A ball screw mechanism has an opposing thread provided by an integral male thread formed at one end of a nut received on the screw. The male thread is of a smaller form than the female thread on the screw so as to not normally be in contact therewith, but should ay loss of the balls occur with the resultant slight relative axial shift of the screw and nut, the male threads engage to limit such relative axial movement to protect connected equipment. Both the nut male and female threads may be machined from a cylindrical nut blank.

Abstract translation: 滚珠丝杠机构具有由形成在螺钉的螺母的一端形成的整体外螺纹所提供的相对螺纹。 外螺纹与螺钉上的内螺纹形状相比较小，从而不能正常接触，但是由于螺钉和螺母的轻微的相对轴向移动，球的损失将发生，所以阳螺纹接合 以限制这种相对的轴向移动以保护连接的设备。 螺母公螺纹和内螺纹都可以从圆柱形螺母坯料加工。

公开(公告)号：US20030024336A1

公开(公告)日：2003-02-06

申请号：US10211353

申请日：2002-08-05

Applicant: NSK LTD.

Inventor： Tsutomu Ohkubo

IPC: F16H025/22

CPC classification number: F16H25/2214 ,  F16H2025/2242 ,  Y10T74/19721 ,  Y10T74/19749

Abstract: The ball screw comprises a shaft including a spiral-shaped shaft groove having a semicircular-shaped (Gothic-arch-shaped) section, a nut including a spiral-shaped nut ball groove which corresponds to the shaft groove and has a semicircular-shaped (Gothic-arch-shaped) section, a large number of balls rotatably fitted into between the nut ball groove and shaft groove in such a manner that they are held by and between these two grooves, and a circulation member capable of defining a ball circulation passage for allowing the balls to circulate endlessly therethrough, wherein a portion of the nut ball groove is formed larger in the effective diameter than the remaining portions of the nut.

Abstract translation: 滚珠丝杠包括轴，其包括具有半圆形（哥特式拱形）截面的螺旋形轴槽，螺母包括对应于轴槽的螺旋形螺母球槽，并具有半圆形（ 哥特式拱形）部分，大量的球以这样的方式可旋转地装配在螺母球槽和轴槽之间，使得它们被这两个槽之间保持，并且能够限定球循环通道 用于允许球循环地循环通过，其中，所述螺母球槽的一部分形成为比所述螺母的其余部分更大的有效直径。

公开(公告)号：US20040211280A1

公开(公告)日：2004-10-28

申请号：US10485881

申请日：2004-02-05

Inventor： Kentarou Nishimura ,  Akimasa Yoshida ,  Hiroshi Niwa

IPC: F16H025/22

CPC classification number: F16C33/3706 ,  F16H25/2219 ,  Y10T74/19749 ,  Y10T74/19767 ,  Y10T74/19772

Abstract: The invention relates to a ball screw device in which a screw shaft and a nut member are threadedly engaged with each other through a number of balls. In such a ball screw device, an inner surface of a cover plate contacting an end surface of a nut main body is provided with a projecting return piece adapted to be fit-engaged with a recess cut in an inner peripheral surface of the nut main body, the return piece being provided with a scoop portion for dislodging the balls from the ball rolling groove of the screw shaft and a direction switching passage for guiding the dislodged balls to the entrance of a ball return hole. The projecting return piece is divided into a first piece formed integral with the cover plate and a second piece fixed to the first piece by a curved plane including the center line of the direction switching passage.

Abstract translation: 本发明涉及一种滚珠丝杠装置，其中螺杆轴和螺母构件通过多个滚珠彼此螺纹接合。 在这种滚珠丝杠装置中，与螺母主体的端面接触的盖板的内表面设置有突出的复位件，该突出的返回件适于与在螺母主体的内周面上切割的凹部配合 所述返回片设置有用于从所述螺杆轴的滚珠滚动槽中移除滚珠的铲斗部分和用于将移动的球引导到球返回孔的入口的方向切换通道。 突出的返回片被分成与盖板一体形成的第一片和通过包括方向切换通道的中心线的弯曲平面固定到第一片的第二片。

公开(公告)号：US20040200303A1

公开(公告)日：2004-10-14

申请号：US10487509

申请日：2004-02-20

Inventor： Masahiro Inoue ,  Isao Usuki ,  Tatsuyuki Miki

IPC: F16H025/22

CPC classification number: F16H25/24 ,  F16H25/2204 ,  F16H25/2214 ,  F16H2025/2242 ,  Y10T74/19721 ,  Y10T74/19749 ,  Y10T74/19753 ,  Y10T74/19763

Abstract: A ball screw device comprises a nut having a thread groove in the inner peripheral surface thereof, a screw shaft having a thread groove in the outer peripheral surface thereof and a plurality of balls interposed between the respective thread grooves. In the screw shaft, the thread groove is of at least substantially one turn. In the screw shaft is provided a ball circulation groove for coupling the downstream and upstream sides of the thread groove so that the balls are returned to the upstream side from the downstream side so as to be thereby circulated.

Abstract translation: 滚珠丝杠装置包括在其内周面具有螺纹槽的螺母，在其外周面具有螺纹槽的螺杆轴和插入在各螺纹槽之间的多个滚珠。 在螺杆轴中，螺纹槽至少基本上为一圈。 在螺杆轴上设置有用于联接螺纹槽的下游侧和上游侧的滚珠循环槽，使得滚珠从下游侧返回到上游侧，从而使其循环。

公开(公告)号：US20040045388A1

公开(公告)日：2004-03-11

申请号：US10603858

申请日：2003-06-26

Applicant: TOYODA KOKI KABUSHIKI KAISHA

Inventor： Sentaro Sugita

IPC: F16H025/22

CPC classification number: F16H25/2223 ,  Y10T74/19772 ,  Y10T409/300056

Abstract: A ball screw mechanism comprises a nut, a screw shaft, plural balls and a deflector. The balls are arranged between a first thread groove which is formed on an inner surface of the nut and a second thread groove which is formed on an outer surface of the screw shaft. The deflector comprises a deflector piece which defines a top plate of a ball-return path and a guide member which defines sidewalls of the ball-return path. The ball-return path returns the balls so as to circulate endlessly. As a manufacturing method of the ball screw device, the deflector piece is attached to the nut first. Next, the first thread groove is ground together with an inner surface of the deflector piece. After that, the guide member is attached to the nut. At last, the balls and the screw shaft are assembled to the nut.

Abstract translation: 滚珠丝杠机构包括螺母，螺杆轴，多个球和偏转器。 滚珠布置在形成在螺母的内表面上的第一螺纹槽和形成在螺杆轴的外表面上的第二螺纹槽之间。 偏转器包括限定球返回路径的顶板的偏转器件和限定回球路径的侧壁的引导件。 回球路返回球，以循环循环。 作为滚珠丝杠装置的制造方法，首先将偏转片固定在螺母上。 接下来，将第一螺纹槽与偏转器片的内表面一起研磨。 之后，引导构件附接到螺母。 最后，将球和螺杆轴组装到螺母上。

公开(公告)号：US20040000208A1

公开(公告)日：2004-01-01

申请号：US10600453

申请日：2003-06-23

Applicant: THK CO., LTD.

Inventor： Hidekazu Michioka ,  Yasuyuki Abe

IPC: F16H025/22

CPC classification number: F16C29/0642 ,  F16C29/0609 ,  F16C29/0695 ,  F16C33/3706 ,  F16H25/2219 ,  F16H25/2223 ,  F16H25/2238 ,  Y10T74/19767 ,  Y10T74/19777

Abstract: A ball screw comprises a screw shaft, a nut assembled with the screw shaft, a number of balls disposed in the ball rolling passage formed by a ball rolling groove formed to the screw shaft and a loaded ball rolling groove formed to the nut, a number of spacers disposed between the balls in the ball rolling passage, and a circulation member for circulating the balls and spacers in accordance with a relative motion of the nut with respect to the screw shaft. The circulation member is provided with a scoop-up groove for scooping the balls, when contacting the ball rolling in the ball rolling passage, at both side edge portions of the scoop-up groove and is also provided with a spacer scoop-up portion which contacts and scoops the spacer moving in the ball rolling passage without contacting the balls. Such circulation member will be preferably utilized for a motion guide device such as linear motion guide or spline shaft.

Abstract translation: 滚珠丝杠包括螺杆轴，与螺杆轴组装的螺母，设置在由滚珠形成的滚珠滚道形成的滚珠滚动通道中的多个滚珠和形成在螺母上的加载滚珠滚动槽， 设置在球滚动通道中的球之间的间隔件，以及循环构件，用于根据螺母相对于螺杆轴的相对运动使球和间隔件循环。 循环构件设置有用于舀取滚珠的铲斗，当与滚珠滚动通道中滚动的滚珠接触在舀起槽的两个侧边缘部分时，还设置有间隔件舀起部分， 接触和舀出间隔件在滚动通道中移动而不接触球。 这种循环构件将优选地用于诸如直线运动引导件或花键轴的运动引导装置。

公开(公告)号：US20030196504A1

公开(公告)日：2003-10-23

申请号：US10396436

申请日：2003-03-26

Applicant: NSK LTD.

Inventor： Yasumi Watanabe ,  Shigeru Okita ,  Masato Kato

IPC: F16H025/22

CPC classification number: F16H25/2214 ,  Y10T74/19749 ,  Y10T74/19767

Abstract: A ball screw has a screw shaft including a spiral-shaped ball rolling groove formed in an outer peripheral surface thereof; a nut including a spiral-shaped ball rolling groove formed in an inner peripheral surface thereof; a plurality of balls disposed in a raceway formed by the two rolling grooves; and, a return path for moving the balls from the terminal point of the raceway to the start point of the raceway, the two end portions of the return path respectively including a rising surface rising from the ball rolling groove of the nut and a stopper portion disposed opposed to the rising surface to form the end portion of the raceway, wherein a boundary portion between the rising surface and the ball rolling groove of the nut is formed a round portion having the radius of curvature 0.05 times the diameter of the ball or more.

Abstract translation: 滚珠丝杠具有在其外周面形成有螺旋状的滚珠滚动槽的螺杆轴; 螺母，包括形成在其内周表面中的螺旋形滚珠滚动槽; 设置在由两个滚动槽形成的滚道中的多个滚珠; 以及用于将滚珠从滚道的终点移动到滚道的起始点的返回路径，返回路径的两个端部分别包括从螺母的滚珠滚动槽上升的上升表面和止动部分 与所述上升面相对配置以形成所述滚道的端部，其特征在于，所述螺母的上升面和滚珠滚动槽之间的边界部分形成为具有比球直径的0.05倍以上的曲率半径的圆形部分 。

公开(公告)号：US20030145670A1

公开(公告)日：2003-08-07

申请号：US10358313

申请日：2003-02-05

Applicant: THK CO., LTD.

Inventor： Satoshi Fujita ,  Yoshiaki Saito

IPC: F16H025/22 ,  F16H057/04

CPC classification number: F16C33/3706 ,  F16H25/2223 ,  F16H25/2238 ,  F16H57/0497 ,  Y10T74/18568 ,  Y10T74/18576 ,  Y10T74/18744 ,  Y10T74/19702 ,  Y10T74/19767 ,  Y10T74/19777

Abstract: A screw device having a lubricant applying structure comprises a screw shaft provided with a spiral ball rolling groove, a nut provided with a loaded ball rolling groove having a spiral shape corresponding to the spiral ball rolling groove formed to the screw shaft, a number of balls disposed in a loaded rolling passage formed by the ball rolling groove and the loaded ball groove, a return member provided for the nut and arranged so as to connect one and another end portions of the loaded rolling passage so that the balls rolling the loaded rolling passage circulate, and a lubricant applying portion mounted to the return member so as to apply a lubricant. The lubricant applying portion is arranged inside the return member provided for the nut.

Abstract translation: 具有润滑剂施加结构的螺杆装置包括设置有螺旋滚珠滚动槽的螺杆轴，设置有与形成在螺杆轴上的螺旋形滚珠槽相对应的具有螺旋形的负载滚珠滚道的螺母，多个滚珠 设置在由滚珠滚动槽和负载滚珠槽形成的加载滚动通道中，设置有用于螺母的返回构件，其布置成连接加载的滚动通道的另一个端部，使得滚珠滚动加载的滚动通道 循环，以及安装到返回构件上以润滑剂的润滑剂施加部。 润滑剂施加部分设置在为螺母设置的返回构件的内部。