Nsk Corporation

Wei Xu

Jun Matsumoto

Toshiaki Suzuki

Soichiro Kato

Yoshinori Mizumura

Masaru Akiyama

Takayuki Yabe

A method of manufacturing a ball screw device includes a nut unit preparation step, a screw shaft preparation step, and an assembly step. In the nut unit preparation step, a nut unit is prepared in which a circulation component, a ball, and a temporary shaft that prevents the ball from falling off are assembled to a nut provided with an inner peripheral track surface. In the screw shaft preparation step, a screw shaft provided with an outer peripheral track surface is prepared. In the assembly step, after the nut unit preparation step and the screw shaft preparation step, the temporary shaft of an arbitrary nut unit is replaced with an arbitrary screw shaft to manufacture the ball screw device.

Method of manufacturing ball screw device

In a linear guide apparatus, a rolling-element accommodation beltis incorporated into each of endless circulation passages. This rolling-element accommodation beltis formed into a shape having ends and has a plurality of rolling-element accommodation sections for individually accommodating balls. Of the rolling-element accommodation sections, first rolling-element accommodation sectionsA located at the respective end sections are formed so as to constrain movement of a spacer sectionlocated at the end section toward the outer periphery side of an endless circulation passage by means of the ballaccommodated in the spacer section. Second rolling-element accommodation sectionsB other than the first rolling-element accommodation sections are formed so as to enable removable accommodation of the ballsto be accommodated toward the inner periphery side of the endless circulation passage.

Accommodation belt for rolling element, and linear guide apparatus

A linear guide device has a guide rail, a slider body, an end cap, a large number of rolling bodies, and separators. The slider bodyhas a slider side rolling body raceway surface opposed to a rail side rolling body raceway surfaceformed on the guide rail. The end caphas a rolling body direction switching pathcommunicating with a rolling body load rolling pathformed between both rolling body raceway surfaces of the guide railand the slider bodyand also communicating with a rolling body return pathformed in a penetrating manner in the slider body, along the longitudinal direction of the guide rail. In conjunction with relative linear movement of a sliderconstituted of the slider bodyand the end cap, the rolling bodiesroll in the rolling body load rolling path, the rolling body return path, and a rolling body direction switching path. The separatorsare arranged between every two adjacent rolling bodies. The end caphas a throughholefor assembling the rolling bodiesand the separatorsfrom the outside of the sliderinto the rolling body return pathand also has a cap memberremovably fitted in the through-hole. The cap memberforms part of the rolling body direction switching path

Linear guide device

A linear guide apparatus has: a guide rail; a slider including a slider body; and a pair of end caps; a guide groove guiding the arm portions of the separators in a circulation direction of the cylindrical rollers when the cylindrical rollers circulate through the pair of the rolling element rolling grooves, the direction change paths, and the rolling element path; and separators each having: a separator body; and an arm portion integrally formed on the separator body, wherein a width of the guide groove is larger than that of the arm portions, the width of the guide groove in a region of each of the direction change paths is larger than that in a region where the cylindrical rollers linearly move, and end portions of each of the arm portions are Chamfered and directed in the circulation direction.

Growing community of inventors

Kanagawa, Japan

Wei Xu