Nsk Corporation

Nippon Seiko Kabushiki Kaisha

Nippon Sieko Kabushiki Kaisha

Toru Tsukada

Soichiro Kato

Toshikazu Yabe

Fumio Ueki

Yutaka Igarashi

Nobuyuki Osawa

Shiroji Yabe

Kenjiro Shiki

Ken Namimatsu

Yasushi Abe

Hiroki Yamaguchi

Yoshinori Mizumura

Toshimi Takajo

Masaru Hattori

Rinzo Isobe

Hitoshi Yamada

Akira Shiobara

A ring-like lubricant supply deviceis fitted into a recessof a nut member. The lubricant supply devicecontains a lubricant and is formed in an outer peripheral surface with notches. Tubular memberseach having an outer diameter larger than the diameter of the notchare inserted into the notches, pushing and widening the notchesin a circumferential direction. One end of the tubular memberis fitted into a recessof a retaining ringand the retaining ringis fixed to a nut member

Feed screw device

In a linear guide apparatus including an axially extending guide rail, a slider engaged with the guide rail, and a plurality of rolling elements loaded into the slider, the linear guide apparatus further includes a sealing device fixed to the slider in slidable contact with the guide rail for sealing a clearance existing between the guide rail and the slider, in which the sealing device includes: a lubricant-containing polymer member formed of a synthetic resin containing a lubricant, and having a contact portion contacting with the guide rail to surround the guide rail, both wing portions, a connecting portion connecting the wing portions to be C-shaped substantially, and a pair of first recesses formed in the respective wing portions for fixing the lubricant-containing polymer member to the slider; a first plate member fitted to the lubricant-containing polymer member opposed to the slider; and a pair of first cylindrical members inserted to the respective first recesses.

Sealing device for linear guide apparatus

In a linear guide apparatus including an axially extending guide rail, a slider engaged with the guide-rail, and a plurality of rolling elements loaded into the slider, the linear guide apparatus further includes a sealing device fixed to the slider in slidable contact with the guide rail for sealing a clearance existing between the guide rail and the slider, in which the sealing device includes a lubricant-containing polymer member formed of a synthetic resin containing a lubricant, and having a contact portion contacting with the guide rail to surround the guide rail, both wing portions, a connecting portion connecting the wing portions to be C-shaped substantially, and a pair of first recesses formed in the respective wing portions for fixing the lubricant-containing polymer member to the slider; a first plate member fitted to the lubricant-containing polymer member opposed to the slider; and a pair of first cylindrical members inserted to the respective first recesses.

A ring-like lubricant supply deviceis fitted into a recessof a nut memberThe lubricant supply devicecontains a lubricant and is formed in an outer peripheral surface with notchesTubular memberseach having an outer diameter larger than the diameter of the notchare inserted into the notches, pushing and widening the notchesin a circumferential direction. One end of the tubular memberis fitted into a recessof a retaining ringand the retaining ringis fixed to a nut member

Three rows of ball rolling grooves A to C are formed in each side of a guide rail , while being vertically arrayed. Three rows of ball rolling grooves A to C are also formed on the inner surface of each of the legs of a slider . The ball rolling grooves A to C are respectively disposed in opposition to the ball rolling grooves A to C to thereby form ball sliding passages A to C. In either of the upper or lower ball rolling passage A or C, each ball contacts, at four points, with the surfaces of the ball rolling groove A or C of the guide rail and the ball rolling groove A or C of the slider . In the remaining ball rolling passages, each ball contacts at two points with the surfaces of the ball rolling grooves. One of lines L and L , each of which connects two opposite contact points of those four ones in the upper or lower ball rolling passage is oriented in the same direction as of lines L and L connecting the contact points in the remaining ball rolling passages. With such a construction, the upper, medium and lower rows of ball trains receive all loads acting on the slider in share, whereby the linear guide assembly exhibits its maximum load capacity against the loads.

Linear guide assembly

A ring-like lubricant supply device is fitted into a recess of a nut member The lubricant supply device contains a lubricant and is formed in an outer peripheral surface with notches Tubular members each having an outer diameter larger than the diameter of the notch are inserted into the notches, pushing and widening the notches in a circumferential direction. One end of the tubular member is fitted into a recess of a retaining ring and the retaining ring is fixed to a nut member

In a linear guide apparatus including an axially extending guide rail, a slider engaged with the guide rail, and a plurality of rolling elements loaded into the slider, the linear guide apparatus further includes a sealing device fixed to the slider in slidable contact with the guide rail for sealing a clearance existing between the guide rail and the slider, in which the sealing device includes a lubricant-containing polymer member formed of a synthetic resin containing a lubricant, and having a contact portion contacting with the guide rail to surround the guide rail, both wing portions, a connecting portion connecting the wing portions to be C-shaped substantially, and a pair of first recesses formed in the respective wing portions for fixing the lubricant-containing polymer member to the slider; a first plate member fitted to the lubricant-containing polymer member opposed to the slider; and a pair of first cylindrical members inserted to the respective first recesses.

Three rows of ball rolling grooves A to C are formed in each side of a guide rail while being vertically arrayed. Three rows of ball rolling grooves A to C are also formed on the inner surface of each of the legs of a slider The ball rolling grooves A to C are respectively disposed in opposition to the ball rolling grooves A to C to thereby form ball sliding passages A to C. In either of the upper or lower ball rolling passage A or C, each ball contacts, at four points, with the surfaces of the ball rolling groove A or C of the guide rail and the ball rolling groove A or C of the slider In the remaining ball rolling passages, each ball contacts at two points with the surfaces of the ball rolling grooves. One of lines L and L each of which connects two opposite contact points of those four ones in the upper or lower ball rolling passage is oriented in the same direction as of lines L and L connecting the contact points in the remaining ball rolling passages. With such a construction, the upper, medium and lower rows of ball trains receive all loads acting on the slider in share, whereby the linear guide assembly exhibits its maximum load capacity against the loads.

A ring-like lubricant supply device is fitted into a recess of a nut member . The lubricant supply device contains a lubricant and is formed in an outer peripheral surface with notches . Tubular members each having an outer diameter larger than the diameter of the notch are inserted into the notches, pushing and widening the notches in a circumferential direction. One end of the tubular member is fitted into a recess of a retaining ring and the retaining ring is fixed to a nut member

Three rows of ball rolling grooves,A to,C are formed in each side of a guide rail,, while being vertically arrayed. Three rows of ball rolling grooves,A to,C are also formed on the inner surface of each of the legs of a slider,. The ball rolling grooves,A to,C are respectively disposed in opposition to the ball rolling grooves,A to,C to thereby form ball sliding passages,A to,C. In either of the upper or lower ball rolling passage,A or,C, each ball contacts, at four points, with the surfaces of the ball rolling groove,A or,C of the guide rail,and the ball rolling groove,A or,C of the slider,. In the remaining ball rolling passages, each ball contacts at two points with the surfaces of the ball rolling grooves. One of lines L,and L,, each of which connects two opposite contact points of those four ones in the upper or lower ball rolling passage is oriented in the same direction as of lines L,and L,connecting the contact points in the remaining ball rolling passages. With such a construction, the upper, medium and lower rows of ball trains receive all loads acting on the slider in share, whereby the linear guide assembly exhibits its maximum load capacity against the loads.

In a linear guide apparatus including an axially extending guide rail, a slider engaged with the guide-rail, and a plurality of rolling elements loaded into the slider, the linear guide apparatus further includes a sealing device fixed to the slider in slidable contact with the guide rail for sealing a clearance existing between the guide rail and the slider, in which the sealing device includes: a lubricant-containing polymer member formed of a synthetic resin containing a lubricant, and having a contact portion contacting with the guide rail to surround the guide rail, both wing portions, a connecting portion connecting the wing portions to be C-shaped substantially, and a pair of first recesses formed in the respective wing portions for fixing the lubricant-containing polymer member to the slider; a first plate member fitted to the lubricant-containing polymer member opposed to the slider, and a pair of first cylindrical members inserted to the respective first recesses.

In a guide rail or slider body manufacturing method for a linear guide device providing a guide rail and a slider mounted on the guide rail, mounting reference surfaces formed on the guide rail or slider body and/or the surfaces of ball rolling grooves formed therein are finished by grinding, and are subjected to rust-proofing surface treatment with protecting members fitted to the surfaces thus finished. Similarly in a method of manufacturing a ball screw device providing a screw shaft and a ball screw nut engaged with the screw shaft, the surfaces of ball rolling grooves formed in the screw shaft and the ball screw nut are finished by grinding, and are subjected to rust-proofing surface treatment with protecting members fitted to the surfaces thus finished. In the methods, the rust-proofing surface treatment is carried out for the surfaces except those which should not be covered with such a rust-proofing film layer for their precision.

Growing community of inventors

Gunma, Japan

Toru Tsukada