Thk Co., Ltd.

Shinji Izumi

Takeki Shirai

Yuki Hayashi

Shigeru Ebina

Yuji Tachikake

Katsuhito Imai

A rolling guiding device makes it possible to easily provide a movement block with an endless circulation path for the balls. In one surface of a movement block opposed to a rolling groove of a raceway rail, there is formed a track groove through which balls makes an endless circulation. The track groove is includes a load straight-line groove which allows, between the track groove and the rolling groove of the raceway rail, the balls to roll while bearing a load. It also includes a pair of ball deflection grooves respectively provided at both ends of the load straight-line groove and adapted to release the balls having rolled through the straight-line groove from the load and to change their rolling direction, and a non-load straight-line groove for transferring the ball in a non-load state from one deflection groove to the other ball deflection groove.

Rolling guiding device

Provided is a linear guidance device in which a track groove () serving as an endless circulation path for balls () can be formed through cutting or grinding with high precision and with ease at low cost. The linear guidance device includes: a raceway rail () provided with a ball rolling groove () which is formed on each side surface thereof; and a movement block () formed in a channel configuration in which a base portion () and a pair of flange portions () are provided so that a guide groove () is formed, and including the track groove which are provided with the guide groove faced with the raceway rail (), in which the track groove includes: a load straight-line groove () formed in an inner surface of the flange portions; a non-load straight-line groove () formed in a concave corner portion of the guide groove which is bordered with the flange portions and the base portion or formed in the base portion so as to be faced with the raceway rail; a ball deflection groove () which communicatively couples the load straight-line groove and the non-load straight-line groove to each other so as to allow the balls to move therebetween.

Growing community of inventors

Tokyo, Japan

Shinji Izumi