Movement guiding device

Abstract

A movement guiding device in which there is no possibility that a pickup part is broken even if a movement member is moved at a high speed. When viewed from the axial direction of a track axis (1), a direction changing passage (10) is tilted relative to a contact angle line (L1)(line connecting the bottom (P1) of a ball rolling groove (1a) to the center (C) of a ball (3)). The cross section of the direction changing passage (10) including the pickup part (17) is formed in a Gothic arch groove shape formed of two circular arcs (R1) so as to come into contact with the ball (3) at two points. Then, the direction changing passage (10) is twisted so that the locus (18) of the top of the Gothic arch groove shape nears the contact angle line (L1) at the pickup part (17).

Description

technical field [0001] The present invention relates to a motion guide device such as a linear guide or a ball spline capable of moving a moving member relative to a rail member. Background technique [0002] Motion guidance devices are embedded in robots, machine tools, and semiconductor and liquid crystal manufacturing equipment to guide the linear or curved motion of moving objects. [0003] A linear guide, a ball spline, etc. are known as one type of motion guide device. linear guides such as Figure 24 As shown, a track rail 31 formed with a ball rolling groove 31 a and a moving block 33 assembled so as to be slidable along the track rail 31 via a plurality of balls 32 are provided. A plurality of loaded ball rolling grooves 32 a facing the ball returning path of the track guide rail 31 , and a ball returning path 38 extending parallel to the loaded ball rolling grooves 32 a are formed in the moving block 33 . A pair of end plates 34 are attached to both ends of the m...

AI Technical Summary

Problems solved by technology

As a result, the effect of forming the pointed arch groove shape is also reduced

Therefore, if the ball is rotated at a high speed, the scooping part may be damaged

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