Roller slewing bearing are one of the main types of crossed roller bearings. They are composed of two races, optional rollers at the cross-rotating position, retaining (isolation block), sealing device and other components. Such as the waist rotation of robots, automated robots require precise rotation of rotating disks, welding station turntables, large-diameter rotating disks, large-diameter towers, and automobiles and other mechanical equipment. Next, let’s follow the editor to understand the characteristics of inertial roller slewing bearings.
1. Loads in all directions can be downloaded
The cross-rolling roller slewing bearing has only one row of rolling elements, but the rolling elements are short rolling elements, and the surrounding rollers roll at 90° cross. There are several raceways in the inner and outer rings, including the problem of which rollers and rollers are axial forces. , Adsorption simple axial force, sponge adsorption force, adsorption force and overturning ability. The length of the roller should be 0.5~1mm longer than its diameter. Integral structure, good embedded. .
2. Isolation block
Cross-rolling roller slewing bearings can be equipped with spacers or without spacers. Many foreign countries used in construction machinery can not be equipped with isolation blocks.
3. Adjustable clearance
Most of the cross-rolling roller bearings are made of parts to facilitate the installation of rolling elements and adjustment of the clearance. But there are also integral ones. Like four-point contact balls, the rubber filling holes are equipped to fill the rollers, and the options are used to adjust the axial movement. The rollers also need to be free after installation. There is always space between the rollers. When the full load direction is usually about 0.5.
4. Increase of effective compressed air
The internal structure of the cross-roller slewing bearing adopts the rollers to form a 90° cross-arrangement, and the rollers are separated from each other. The retainer isolation or isolation block can prevent the rollers from observing each other and effectively prevent the rotation lock. The increase. In addition, there will be no contact between the two rollers.
Single row cross roller slewing bearing
5. Centrifugal rotation
For non-standard roller bearings that cross at the same time, the outer circumference is a divided structure, and the gap can be adjusted. Even if preloading is applied, it can obtain a rotational movement.
6. Simple operation
After the divided inner ring or outer ring is installed with rollers and spacers, it is fixed with the cross roller ring to prevent complete separation, so the operation when installing the roller ring is very simple.
7. Prevent the roller from falling sideways
The cage eliminates the interconnection between the rollers and prevents the rollers from falling sideways, so that a stable rotating column can be obtained.
8. One place raises the air
Different from the use of double row thin angular contact ball bearings, the columns are arranged in a vertical cross, so the load in all directions can be controlled with a single cross roller ring, and the expansion is 3 to 4 or more.
The above is an introduction to the characteristics of wave roller slewing bearings. In fact, the characteristics and applications of structural roller slewing bearings are basically the same as those of four-point contact ball slewing bearings, except that the rolling elements are made of steel ball rollers, the rolling elements and the outer ring. The contact changes from point contact to line contact.