公开(公告)号：US20030061893A1

公开(公告)日：2003-04-03

申请号：US10283307

申请日：2002-10-30

申请人： NSK Ltd.

发明人： Kazuo Miyaguchi ,  Tsutomu Ohkubo ,  Takeshi Nakazawa ,  Shirouji Yabe ,  Soichiro Kato ,  Nobumitsu Takahashi ,  Ryouichi Sato ,  Hiroki Yamaguchi ,  Yoshinori Mizumura

IPC分类号： F16H001/14 ,  F16H001/20

CPC分类号： F16C33/3706 ,  F16C19/20 ,  F16C29/064 ,  F16C33/3713 ,  F16H25/2238 ,  F16H2025/2242 ,  Y10T74/18568 ,  Y10T74/18648 ,  Y10T74/18656 ,  Y10T74/19693 ,  Y10T74/19702 ,  Y10T74/19744 ,  Y10T74/19777 ,  Y10T74/19953

摘要： In a ball screw device comprising a screw shaft and a nut which make relative movement to each other through a multiplicity of balls, as well as in a linear motion device comprising an outer member and an inner member which make the relative movements to each other through the multiplicity of balls, a spacer having two concave surfaces facing respectively to balls, is disposed between the balls adjacent to each other. A section of each of the concave surfaces of the spacer is formed of two circular arcs of which central positions deviate from each other to form a Gothic arch. The spacer has such a configuration that the balls adjacent to each other come into contact with outer edges thereof or portions vicinal to the outer edges. The spacer also has such a configuration that the balls adjacent to each other come into contact with at least three or more outer edge portions thereof or portions vicinal to the outer edges. The spacer may have a through-hole formed in a thinnest portion thereof.

公开(公告)号：US20040123692A1

公开(公告)日：2004-07-01

申请号：US10737811

申请日：2003-12-18

申请人： NSK LTD.

发明人： Tsutomu Ohkubo ,  Takeshi Nakazawa

IPC分类号： F16C029/04

CPC分类号： F16C33/3706 ,  F16C33/3713 ,  F16H25/2214 ,  F16H25/2238 ,  Y10T74/19749 ,  Y10T74/19767 ,  Y10T74/19777

摘要： Between two mutually adjoining load balls 5, there is interposed a retaining piece 10 having two concave surfaces 11 which are respectively opposed to the two adjoining load balls 5. The retaining piece 10 has an outside diameter dimension equal to or more than 0.5 times the outside diameter dimension of the load ball 5. Further, the retaining piece 10 has an outside diameter dimension which, when the retaining piece 10 passes through a screw groove circulation passage and a tube circulation passage, prevents the retaining piece 10 from touching the inner walls of these screw groove circulation passage and tube circulation passage, or has an outside diameter dimension which is equal to or less than 0.9 times the outside diameter dimension of the load ball. Accordingly, it is possible to provide a ball screw mechanism which can prevent a retaining piece from interfering with the inner walls of circulation passages to circulate load balls stably to thereby prevent variations in torque as well as prevent the wear of the retaining piece to thereby enhance the durability thereof.

公开(公告)号：US20030024337A1

公开(公告)日：2003-02-06

申请号：US10254672

申请日：2002-09-26

申请人： NSK LTD.

发明人： Tsutomu Ohkubo ,  Takeshi Nakazawa

IPC分类号： F16H025/22

CPC分类号： F16C33/3706 ,  F16C33/3713 ,  F16H25/2214 ,  F16H25/2238 ,  Y10T74/19749 ,  Y10T74/19767 ,  Y10T74/19777

摘要： Between two mutually adjoining load balls 5, there is interposed a retaining piece 10 having two concave surfaces 11 which are respectively opposed to the two adjoining load balls 5. The retaining piece 10 has an outside diameter dimension equal to or more than 0.5 times the outside diameter dimension of the load ball 5. Further, the retaining piece 10 has an outside diameter dimension which, when the retaining piece 10 passes through a screw groove circulation passage and a tube circulation passage, prevents the retaining piece 10 from touching the inner walls of these screw groove circulation passage and tube circulation passage, or has an outside diameter dimension which is equal to or less than 0.9 times the outside diameter dimension of the load ball. Accordingly, it is possible to provide a ball screw mechanism which can prevent a retaining piece from interfering with the inner walls of circulation passages to circulate load balls stably to thereby prevent variations in torque as well as prevent the wear of the retaining piece to thereby enhance the durability thereof.

公开(公告)号：US20020088294A1

公开(公告)日：2002-07-11

申请号：US10038660

申请日：2002-01-08

申请人： NSK Ltd.

发明人： Kazuo Miyaguchi ,  Takeshi Nakazawa ,  Yoshinori Mizumura

IPC分类号： F16H001/14

CPC分类号： F16C33/3706 ,  F16C19/20 ,  F16C29/064 ,  F16C33/3713 ,  F16H25/2238 ,  F16H2025/2242 ,  Y10T74/18568 ,  Y10T74/18648 ,  Y10T74/18656 ,  Y10T74/19693 ,  Y10T74/19702 ,  Y10T74/19744 ,  Y10T74/19777 ,  Y10T74/19953

摘要： In a ball screw device comprising a screw shaft and a nut which make relative movement to each other through a multiplicity of balls, as well as in a linear motion device comprising an outer member and an inner member which make the relative movements to each other through the multiplicity of balls, a spacer having two concave surfaces facing respectively to balls, is disposed between the balls adjacent to each other. A section of each of the concave surfaces of the spacer is formed of two circular arcs of which central positions deviate from each other to form a Gothic arch. The spacer has such a configuration that the balls adjacent to each other come into contact with outer edges thereof or portions vicinal to the outer edges. The spacer also has such a configuration that the balls adjacent to each other come into contact with at least three or more outer edge portions thereof or portions vicinal to the outer edges. The spacer may have a through-hole formed in a thinnest portion thereof.

摘要翻译： 在一种滚珠丝杠装置中，该滚珠丝杠装置包括通过多个滚珠使彼此相对运动的螺杆轴和螺母，以及包括外部构件和内部构件的直线运动装置，所述外部构件和内部构件使彼此相对运动 多个球，具有分别面对球的两个凹面的间隔件设置在彼此相邻的球之间。 间隔件的每个凹面的一部分由两个圆弧形成，其中心位置彼此偏离以形成哥特式拱形。 间隔件具有使彼此相邻的滚珠与其外边缘或与外边缘相邻的部分接触的构造。 间隔件还具有这样的构造：使彼此相邻的滚珠与至少三个或更多的外边缘部分或与外边缘相邻的部分接触。 间隔件可以具有形成在其最薄部分中的通孔。