Nsk Corporation

Shizuo Kashiwagi

Kunio Kawashima

Hiroaki Fujishiro

Tomohiro Imanishi

Yutaka Tsuchida

Yasuyuki Yamazaki

Ryoichi Sato

When working a linear guide rail having one or more raceway grooveson the side surfaces thereof, using rotary dies each including on the circumferential portion thereof a projection-shaped working portion matched in shape to the raceway groove, the raceway groovesare rolled onto a rail blank work W. Since the raceway groovescan be rolled with high accuracy by a single working step, the working time of the raceway grooves as well as the working cost thereof can be reduced.

Linear guide rail and method for working same

To provide a dustproof device for a linear guide rail capable of protecting bolt holes in the linear guide rail from foreign matters such as cutting dust or the like without many tap holes formed in an end face of the linear guide rail. A tension applying means for applying a tension to a band-like cover body includes a tension applying block arranged at an end of a linear guide rail a plurality of pressing plates for pressing the band-like cover body on an upper face of the tension applying block and a pressing plate fixing bolt for fixing the pressing plates on the tension applying block A pair of right and left arm portions each having an engagement convex portion engaging with a rolling element rolling groove in the linear guide rail are provided on the tension applying block

Dustproof device for linear guide rail

When working a linear guide rail having one or more raceway grooves on the side surfaces thereof, using rotary dies each including on the circumferential portion thereof a projection-shaped working portion matched in shape to the raceway groove the raceway grooves are rolled onto a rail blank work W. Since the raceway grooves can be rolled with high accuracy by a single working step, the working time of the raceway grooves as well as the working cost thereof can be reduced.

A linear guide bearing device , which serves as the above-mentioned linear guide device, comprises a guide rail and a slider . The guide rail includes a plurality of rolling element rolling grooves . The slider includes a plurality of load rolling element rolling grooves and a plurality of curved passages . The rolling grooves and cooperate together in forming their associated load rolling passages respectively. In an area ranging over each set of the rolling element rolling passage and curved passage there is formed a crowning in a direction where the rolling groove moves away from its associated rolling groove . In the end portion of each curved passage on the rolling groove side, there is formed a tongue portion . The crowning is structured such that, between the load rolling element that belongs to the rolling elements respectively rolling with a load within their associated rolling element rolling passage and is situated in the end portion of the present rolling element rolling passage and the tongue portion of the curved passage , there can be present only one no-load rolling element which rolls with no load.

Growing community of inventors

Bloomingdale, IL, United States of America

Shizuo Kashiwagi