Soft-belt-free four-point-contact ball slewing support bearing

Abstract

The invention discloses a soft-belt-free four-point-contact ball slewing support bearing. The soft-belt-free four-point-contact ball slewing support bearing comprises a soft-belt-free outer ring, a soft-belt-free inner gear ring and a rolling body, wherein the rolling body is arranged between the soft-belt-free outer ring and the soft-belt-free inner gear ring. A first soft-belt-free annular groove is formed in the circumferential inner diameter position of the soft-belt-free outer ring. A second soft-belt-free annular groove is formed in the circumferential outer diameter position of the soft-belt-free inner gear ring. The first soft-belt-free annular groove and the second soft-belt-free annular groove are combined to form a cavity, wherein the cross section of the cavity is in a round shape. The rolling body is put in the cavity. By means of the soft-belt-free three-row cylindrical roller slewing support bearing, heating and cooling are conducted on the surface of a roll way at the same time, no soft-belt-free area can be generated, and therefore, the problem that the surface of the roll way cracks due to secondary heating is avoided; a low-hardness area formed due to quenching is not generated; meanwhile, the slewing support heat treatment step is simplified; work efficiency is improved; and the service life of the three-row cylindrical roller slewing support bearing can beprolonged conveniently.

Description

technical field [0001] The invention belongs to the technical field of slewing bearings, and in particular relates to a four-point contact ball slewing bearing without soft belts. Background technique [0002] The four-point contact ball bearing is a separable bearing, and it can also be said to be a set of angular contact ball bearings that can withstand bidirectional axial loads. The raceways of the inner and outer rings are peach-shaped cross-sections. When there is no load or pure radial load, the steel ball and the ring appear as four-point contact, which is also the origin of the name, and can bear larger shafts at the same time. direction, radial load and overturning moment. It is used in various construction machinery and rotary workbenches. It is an important part of the rotary mechanism of construction machinery. It has high requirements for the quenching quality of its raceways. Generally, its surface is required to have high hardness and wear resistance. The ma...

AI Technical Summary

Problems solved by technology

Since the existing technology cannot avoid the generation of hardened soft belts, the direction of the load must be considered during the installation of the slewing ring. Therefore, it is necessary to place the soft belts in non-main load-bearing areas as much as possible to prevent the contact area between the soft belts and the rollers from being subjected to motion loads. The transitional wear in the process leads to the overall scrapping of the slewing bearing, but such an operation method limits the scope of use of the slewing bearing, reduces the service life of the slewing bearing, and increases the maintenance cost of the equipment later, which has become an important factor restricting the development of slewing bearing enterprises in my country. factor

[0004] In the prior art, in order to avoid hardening soft bands, after the workpiece is clamped and fixed, an intermediate frequency induction hardening device is used to heat and quench the outer surface of the slewing bearing along a specific guide rail. This working method requires a lot of preparation time. The work efficiency is low, and it cannot solve the problem of soft belt existing in the heat treatment process of the four-point contact ball slewing ring bearing, resulting in a short service life of the slewing ring bearing and increasing the maintenance cost of the enterprise

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