Crossed roller bearing

Crossed roller bearings are a special type of bearing with inner ring separation and outer ring rotation. Since the separate inner or outer ring is fixed to the cross roller collar after the roller and the spacer are installed, in order to prevent separation from each other, the operation is simple when the cross roller collar is installed. Since the rollers are arranged in a crisscross arrangement, only one set of crossed roller ferrules can withstand loads in all directions and the stiffness is increased by a factor of 3 to 4 compared to conventional models. At the same time, since the inner ring or the outer ring of the crossed roller bearing has a bipartite structure, the bearing clearance can be adjusted, and even if a preload is applied, a high-precision rotational motion can be obtained. In addition, due to its special structure, it is commonly used as a joint bearing in industrial robots.

 

Use feature

Crossed roller bearings, because of the separate inner or outer ring, are mounted on the rollers and washers after mounting the rollers and shim to prevent separation from each other, so it is simple to install the cross roller collar. Since the rollers are arranged in a crisscross arrangement, only one set of crossed roller ferrules can withstand loads in all directions and the stiffness is increased by a factor of 3 to 4 compared to conventional models. At the same time, since the inner ring or the outer ring of the crossed roller bearing has a bipartite structure, the bearing clearance can be adjusted, and even if a preload is applied, a high-precision rotational motion can be obtained.

 

1, with excellent rotation accuracy

The internal structure of the crossed roller bearing is arranged 90° perpendicular to each other by rollers.

Place a spacer or spacer between the rollers to prevent the rollers from tilting between the rollers. In addition, the contact phenomenon or the locking phenomenon of the roller does not occur; at the same time, since the inner ring and the outer ring are separate structures, the gap can be adjusted, and even if a preload is applied, a high-precision rotary motion can be obtained.

 

2, the operation is simplified

After the roller and the retainer are loaded, the outer or inner ring is divided into two parts, so the operation is very simple.

 

3. Withstand large axial and radial loads

The rollers are vertically aligned with each other due to the 90° shims on the rolling surface of the V-groove.

 

4, greatly saving installation space

The dimensions of the inner and outer rings of the crossed roller bearing are miniaturized to a minimum. In particular, the ultra-thin structure is a small size close to the limit and has high rigidity, so it is most suitable for the rotation of the connecting portion or the rotating portion of the industrial robot and the machining center. Wide range of applications such as work benches, robotic rotating parts, precision rotary tables, medical instruments, measuring instruments and IC manufacturing equipment.