Linear-reciprocating device

摘要

A linear-reciprocating device 10 has a moving block 13 which is attached to a guide rail 12 provided to a support base 11 so as to freely reciprocate, ball rolling grooves 23a and 23b which form ball rolling paths 24a and 24b together with ball rolling grooves 21a and 21b are provided to a base end of the moving block 13, and ball circulation holes 25a and 25b which are communicated to the ball rolling paths 24a and 24b are provided to a base end. In a longitudinal-directional middle area of the moving block 13, return blocks 32a and 32b which communicate between the ball rolling paths 24a and 24b and the ball circulation holes 25a and 25b are provided. The moving block 13 moves to a position at which the moving block 13 is moved to a position at which the moving block is protruded from a distal end of the guide rail 12.

主权项

1. A linear-reciprocating device for linearly reciprocating a moving block attached so as to freely reciprocate to a guide rail provided to a support base, comprising:
a first ball rolling groove formed on a side surface of the guide rail so as to face a side surface of a guide groove which is formed on an inner surface of the moving block and into which the guide rail is inserted; a second ball rolling groove formed on a base end side of the guide groove and forming a ball rolling path together with the first ball rolling groove; a plurality of balls housed in the ball rolling path and in a ball circulation hole formed along the ball rolling path; a return lid member provided to a base end of the moving block to form a base-end-side ball return path for communication between the ball rolling path and the ball circulation hole; and a return block provided to a longitudinal-directional middle area of the moving block to form a middle-side ball return path for communication between the ball rolling path and the ball circulation hole, wherein the moving block is guided by the balls to a position at which a distal end of the moving block is protruded from a distal end of the guide rail, wherein an abutment surface on which the return block is abutted is formed in a longitudinal-directional middle area of an inner surface of the moving block.