CN202280734U - Double-row roller-type slewing bearing - Google Patents

Abstract

The utility model discloses a double-row roller type slewing bearing, which belongs to the technical field of slewing bearings. The technical proposal of the utility model is to design a double-row roller type slewing bearing, which The rollers and the lower row of rollers are provided with two raceways above and below the inner ring surface of the outer race, and two raceways corresponding to the outer race are arranged on the outer ring surface of the inner race. The upper row of rollers is installed on the upper raceway, and the lower row of rollers is installed on the lower raceway. Compared with the existing single-row cross-roller slewing ring, the utility model has the same diameter of the center of rotation of the rollers. The axial bearing capacity and overturning moment bearing capacity are increased several times; the utility model is mainly used in the working occasions that require high rotation precision, radial force, axial force and overturning moment.

Description

A double-row roller slewing bearing

technical field

The utility model belongs to the technical field of slewing bearings, relates to a slewing bearing, in particular to a double-row roller type slewing bearing.

Background technique

The single-row cross-roller slewing bearing can bear large radial force, but its axial bearing capacity and overturning moment bearing capacity are relatively weak; in the case of small axial bearing capacity and overturning moment, it has high rigidity, It has the advantages of small deformation and high running precision, but when subjected to large axial force and overturning moment, the deformation is large, which cannot meet the requirements of running precision.

Contents of the invention

The purpose of the utility model is to overcome the defects existing in the prior art, and to design a compact structure, small deformation, high rigidity, high precision, which can not only bear a large radial force, but also bear a large axial load. Force and overturning moment double row roller slewing ring.

In order to achieve the above purpose, the technical solution of the utility model is to design a double-row roller slewing ring, which includes an inner race, an outer race, an upper row of rollers and a lower row of rollers, and the upper and lower rollers on the inner ring surface of the outer race There are two raceways, and two raceways corresponding to the outer raceway are arranged on the outer ring surface of the inner raceway. The upper row of rollers is installed on the upper raceway, and the rollers are installed on the lower raceway. Lower row of rollers.

The outer race is composed of upper and lower parts, and the upper and lower parts are connected by bolts.

The upper raceway is a horizontal straight raceway.

The lower raceway is a cross raceway.

The upper raceway is sealed by a sealing ring a, and the lower raceway is sealed by a sealing ring b.

The advantages and beneficial effects of the utility model are: the double-row roller slewing bearing of the utility model adds a row of horizontal linear rollers on the basis of the existing single-row cross-roller slewing bearing. The radial force is borne by the lower row of rollers, and the axial force and overturning moment are jointly borne by the upper and lower row of rollers. Compared with the existing single-row cross-roller slewing bearing, the utility model improves the axial bearing capacity and overturning moment bearing capacity by several times under the condition that the diameter of the roller slewing center is the same.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model.

Among them, 1-outer race, 2-upper roller, 3-sealing ring a, 4-inner race, 5-lower roller, 6-sealing ring b, 7-bolt.

Detailed ways

The specific implementation of the utility model will be further described below in conjunction with the accompanying drawings and examples. The following examples are only used to illustrate the technical solution of the utility model more clearly, but not to limit the protection scope of the utility model.

The technical scheme of the utility model is:

As shown in Figure 1, the utility model is a double-row roller slewing ring, including an inner race 4, an outer race 1, an upper row of rollers 2 and a lower row of rollers 5. There are two raceways on the top and bottom of the inner raceway 4, two raceways corresponding to the outer raceway are arranged on the outer ring surface of the inner raceway 4, and the upper row of rollers 2 is installed on the upper raceway, and the Lower roller 5 is installed on the lower raceway.

The outer race is composed of upper and lower parts, and the upper and lower parts are connected by bolts 7 .

The upper raceway is a horizontal straight raceway.

The lower raceway is a cross raceway.

The upper raceway is sealed by the sealing ring a3, and the lower raceway is sealed by the sealing ring b6.

The double-row roller slewing bearing of the utility model adds a row of horizontal straight rollers on the basis of the existing single-row cross roller slewing bearing. The radial force is borne by the lower row of rollers, and the axial force and overturning moment are jointly borne by the upper and lower row of rollers. Compared with the existing single-row cross-roller slewing bearing, the utility model improves the axial bearing capacity and overturning moment bearing capacity by several times under the condition that the diameter of the roller slewing center is the same. At the same time, it has compact structure, small deformation, high rigidity and good precision effect. The slewing support of the utility model is suitable for working occasions that require high slewing precision, large radial force, axial force and overturning moment.

Claims (5)

1. A double-row roller slewing ring, characterized in that it includes an inner race, an outer race, an upper row of rollers and a lower row of rollers, and two raceways are arranged above and below the inner ring surface of the outer race, Two raceways corresponding to the outer raceway are arranged on the outer ring surface of the inner raceway, an upper row of rollers is installed on the upper raceway, and a lower row of rollers is installed on the lower raceway. 2. The double-row roller slewing bearing according to claim 1, characterized in that: the outer race is composed of upper and lower parts, and the upper and lower parts are connected by bolts. 3. The double-row roller slewing bearing according to claim 1, wherein the upper raceway is a horizontal straight raceway. 4. The double-row roller slewing bearing according to claim 1, wherein the lower raceway is a cross raceway. 5. The double-row roller slewing bearing according to any one of claims 1 to 4, characterized in that: the upper raceway is sealed by a sealing ring a, and the lower raceway is sealed by a sealing ring b.

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