LINEAR MOTION GUIDE UNIT

To provide a linear motion guide unit which can be reduced in weight, and can improve the assembling performance of the other member to an outer cylinder while suppressing an increase in the number of part items.SOLUTION: A linear motion guide unit comprises a spline shaft having a first raceway surface extending in a longitudinal direction, and provided with a shaft penetration hole penetrating in the longitudinal direction, an outer cylinder relatively movably attached to the spline shaft, and having a second raceway surface opposing the first raceway surface, and a plurality of rolling bodies rolling in a raceway path which is constituted of the first raceway surface and the second raceway surface. The outer cylinder includes an end cap including a return path progressing in parallel with the raceway path, and a direction conversion path for connecting the return path with the raceway path, and an integrated raceway component placed at an outer diameter side of the return path. The raceway component includes a cylindrical part having an inner diameter face at which the second raceway surface is formed, and a flange part protruding to the outer diameter side from an outer diameter face of the cylindrical part.SELECTED DRAWING: Figure 1 【課題】軽量化を図ることができ、部品数の増加を抑えながら他の部材の外筒への取り付け性の向上を図ることができる直動案内ユニットを提供する。【解決手段】直動案内ユニットは、長手方向に延びる第１軌道面を有し、長手方向に貫通する軸貫通孔が設けられたスプライン軸と、スプライン軸に相対移動可能に取り付けられ、第１軌道面に対向する第２軌道面を有する外筒と、第１軌道面と第２軌道面とから構成される軌道路を転動する複数の転動体と、を備える。外筒は、軌道路と並行するリターン路およびリターン路と軌道路とを接続する方向転換路を含むエンドキャップと、リターン路の外径側に配置される一体型の軌道部品と、を含む。軌道部品は、第２軌道面が設けられた内径面を有する筒状部と、筒状部の外径面から外径側に突出するフランジ部と、を含む。【選択図】図１