cylindrical rollers slewing ring factory

1.What are the characteristics of cylindrical rollers slewing ring?

Cylindrical roller slewing ring is a kind of crossed roller bearing, which is mainly composed of two races, single row of crossed cylindrical rollers, cage (isolation block), sealing device and other parts.

It is widely used in the waist rotation of robots such as handling and palletizing, rotary disks with high precision and rigidity on automation lines, welding station turntables, large-diameter rotary disks, tower cranes with medium and above diameters, and truck cranes.

1. Can carry loads in all directions
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The cylindrical rollers slewing ring has only one row of rolling elements, but the rolling elements are short cylindrical rollers. The axes of the adjacent rollers are arranged in a 90° cross arrangement. There are two raceways in the inner and outer rings.

Axial force, half bear the upward axial force, this bearing can bear radial force, axial force and overturning moment. Usually the length of the cylindrical roller should be 0.5~1mm shorter than its diameter. The integral structure is simple and rigid.
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2. Isolation block
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The cylindrical rollers slewing ring can be with or without spacer. Most of the foreign ones used in construction machinery do not have isolation blocks.
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3. Adjustable clearance
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Most of the cylindrical rollers slewing ring are made of split type, which is convenient for installing rolling elements and adjusting the clearance. But there are also integral ones, like four-point contact balls, which use filling holes to fill the rollers, and use options to adjust the axial clearance. After the rollers are full, some clearance is also required, and the total clearance between the rollers is usually about 0.5d in the circumferential direction.

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4. Effectively prevent the increase of rotational torque
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The internal structure of the cylindrical rollers slewing ring adopts the rollers arranged perpendicular to each other at 90°, and the spacers or spacers are installed between the rollers, which can prevent the inclination of the rollers and the mutual abrasion between the rollers, effectively preventing the An increase in rotational torque. In addition, there is no contact phenomenon or locking phenomenon of one side of the rollers.

5. High-precision rotation
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Non-standard cylindrical rollers slewing ring, at the same time, because the inner and outer rings are divided structures, the clearance can be adjusted, and even if preload is applied, high-precision rotational motion can be obtained.
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6. Easy to operate
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The divided inner ring or outer ring, after the rollers and spacers are installed, are fixed with the cross-roller ring to prevent them from separating from each other, so the operation when installing the cross-roller ring is very simple.
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7. Prevent the roller from falling sideways
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The mutual friction between the rollers is eliminated by the spacer, and the rollers are prevented from falling sideways, so that a stable rotational torque can be obtained.
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8. Greatly improved rigidity
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Different from the use of double-row thin angular contact ball bearings, since the rollers are arranged vertically and crossed, only one crossed roller collar can bear loads in all directions, and the rigidity is

increased by more than 3 to 4 times.