Ball linear guide rail and method for producing ball linear guide rail

Abstract

The present invention is a ball linear guide comprising a metallic component (1), the metallic component comprising a metallic flat plate base (10), the metallic flat plate base being formed by erecting thereon a pair of plate portions (11, 12) and connecting the pair of plate portions integrally with each other through a first flat plate portion (13), the pair of plate portions (11, 12) being respectively formed with dovetail grooves (4') which respectively constitute loaded ball grooves (4); a first synthetic resin component (2) disposed so as to cover the flat plate base (10) in an inserted state of the pair of plate portions (11, 12) into the first synthetic resin component (2), the first synthetic resin component (2) having one sides which connect to a third flat plate portion to form slits, also having a pair of unloaded ball holes (6), and further having grooves (7) for forming direction changing U-shaped passages which connect the loaded ball grooves (4) and the unloaded ball holes (6) with each other at both ends; and a pair of second synthetic resin components (31, 32) mounted on the first synthetic resin component (2) and closing the unloaded ball holes (6) and the direction changing U-shaped passages (7), the pair of second synthetic resin components (31, 32) having other sides for forming the slits.

Description

technical field [0001] The invention relates to a ball linear guide and a method for manufacturing the ball linear guide. Background technique [0002] Ball linear guides are mostly used in the X, Y, and Z axes of working machines such as NC machines, as well as other processing machines, automatic welding machines, injection molding machines, automatic conveyors, industrial robots, and other general industrial machinery. department. [0003] The ball linear guide is configured to continuously circulate balls on a circular ball circulation path. Fig. 5 shows the structure of an example of a conventional ball linear guide, (a) is a top view, (b) and (c) are side views in different directions, and (d) is a B-B sectional view of (b), (e) is A-A sectional view of (a) (LM block end face). [0004] In these figures, 51 is an LM block (sliding body), which constitutes the main body of the bearing mounted on the rail base, and 52 and 53 are installed at both ends of the LM block ...

AI Technical Summary

Problems solved by technology

That is, since it is necessary to process threads, process positioning holes, etc. during component assembly, it is impossible to reduce man-hours, and it is not easy to assemble. Collision with ball 51 (metal), loud noise

[0013] In particular, when the LM slider 51 is pulled out from the rail 66, in order to prevent the balls 61 from falling off, if the ball drop-off prevention member 65 is provided, the number of parts is large, and the assembly man-hour cannot be reduced.

[0014] That is, in the front of the ball row of the loaded balls, the method of providing the ball drop-off prevention member 65 is a structure that must fix a structure such as a round-angle linear body on the front of the ball row, and because in this case Next, on the sliding side, that is, on the side of the rail 66, it is also necessary to provide a concave portion 67 for the passage of the line body 65, so the processing man-hours are many, and the man-hours cannot be reduced as a whole.

Images