The linear guide formed by the combination of the shaft and the linear bearing (or oil-free bushing) is composed of the simplest guide rail and slider. Here, the changes and characteristics of linear guides other than this structure are explained.
(1) Linear guide of shaft and linear bushing Disadvantages
There are the following disadvantages.
(2) Progress in direct-action orientation
The following simple diagram illustrates the progress of linear guides.
Explain simply with diagrams.
a) Ball splines are provided with rolling grooves of ball bearings on the shaft, allowing only linear motion to be free. (Refer to [Figure 1])
b) Set a shaft guide rail on the hollow part of the shaft to improve the rigidity of the track. The structure formed by cutting this part with the matching linear bushing (refer to [Figure 2])
c) The free ball retainer is set as a bearing, so rotation and linear motion are not restricted.
d) The basic structure is similar to b), but in order to improve the load resistance, a bearing rolling groove is provided to expand the contact area between the bearing and the track (see [Figure 3]).
