CN202493582U - Cross pin roller type slewing bearing - Google Patents

Abstract

The utility model discloses a cross pin roller type slewing bearing. The cross pin roller type slewing bearing comprises an inner ring and an outer ring, wherein an annular raceway is arranged between matching surfaces of the inner ring and the outer ring, a cross section of the annular raceway is quadrilateral, a plurality of pin rollers are arranged in the annular raceway and distributed in a ring shape along the annular raceway, an annular groove is respectively arranged between the matching surfaces of the inner ring and the outer ring above the annular raceway and below the annular raceway, and an annular sealing strip is arranged in each annular groove. An oil hole leading to the annular raceway is arranged on the outer ring, a nozzle is arranged on the outer ring, and a gear ring is arranged on an outer wall of the outer ring. The cross pin roller type slewing bearing has a reasonable structure; the shape of the annular raceway between the inner ring and the outer ring of an existing slewing bearing is changed, original rollers are replaced by the pin rollers, and therefore bearing capacity of the slewing bearing is effectively enlarged; and the cross pin roller type slewing bearing is widely used in the occasions that the size of a host structure is limited and large bearing capacity is needed.

Description

Cross roller slewing ring

technical field

The utility model relates to the field of slewing bearings, in particular to a cross roller slewing bearing.

Background technique

Slewing bearings are also called slewing bearings, also known as: rotating bearings, slewing bearings. Slewing bearings are widely used in real industry, and are called "joints of machines". They are necessary for machines that need to perform relative rotary motion between two objects and simultaneously bear axial force, radial force, and tilting moment. Important transmission components. With the rapid development of the machinery industry, slewing bearings have been widely used in shipbuilding equipment, engineering machinery, light industrial machinery, metallurgical machinery, medical machinery, industrial robots, tunnel boring machines, and rotating stage lights.

There is an annular raceway between the mating surfaces of the inner and outer rings of the slewing ring, and the balls installed in the ring raceway between the inner and outer rings of the slewing ring mostly realize the slewing motion, but the bearing capacity of this slewing ring is limited and cannot be used in For devices with limited structural size and large load-bearing capacity.

Utility model content

The purpose of this utility model is to provide a cross-roller type slewing bearing, change the shape of the annular raceway between the inner and outer ring mating surfaces of the slewing bearing, and change the original balls into rollers to improve the bearing capacity of the slewing bearing ability.

The technical scheme of the utility model is as follows:

A cross-roller type slewing bearing, including inner and outer rings, characterized in that: an annular raceway with a regular quadrilateral cross-section is provided between the mating surfaces of the inner and outer rings, and there are multiple ring-shaped raceways in the annular raceway. Rollers with ring-shaped raceways, ring-shaped grooves are respectively provided between the mating surfaces of the inner and outer rings above and below the ring-shaped raceways, and ring-shaped sealing strips are arranged in the ring-shaped grooves; An oil injection hole leading to the annular raceway is provided and an oil nipple is installed, and a ring gear is arranged on the outer wall of the outer ring.

The above-mentioned cross-roller slewing bearing is characterized in that: the upper and lower ends of the ring gear on the outer wall of the outer ring are respectively provided with chamfers.

The beneficial effects of the utility model:

The utility model has a reasonable structure, changes the shape of the annular raceway between the inner and outer ring matching surfaces of the original slewing bearing, and changes the original ball into a roller, which effectively improves the bearing capacity of the slewing bearing and is widely used in The main engine is limited by the structural size and requires a large load-carrying capacity.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Referring to Figure 1, a cross-roller slewing bearing includes inner and outer rings 1 and 2, and an annular raceway with a regular quadrilateral cross-section is provided between the mating surfaces of the inner and outer rings 1 and 2. There are multiple ring raceways in the ring raceway. The rollers 3 distributed in a ring along the ring raceway are respectively provided with annular grooves between the mating surfaces of the inner and outer rings 1 and 2 located above and below the ring raceway, and ring-shaped sealing strips 4 are arranged in the ring grooves; the outer rings 2 is provided with an oil injection hole 5 leading to the annular raceway and an oil nozzle 6 is installed, and the outer wall of the outer ring 2 is provided with a ring gear 7 .

The upper and lower ends of the ring gear 7 on the outer wall of the outer ring 2 are respectively provided with chamfers 8 .

Claims (2)

1. A cross-roller type slewing bearing, including inner and outer rings, characterized in that: an annular raceway with a regular quadrilateral cross section is provided between the mating surfaces of the inner and outer rings, and there are multiple ring raceways in the ring raceway Rollers distributed in a ring along the ring raceway are provided with ring grooves between the mating surfaces of the inner and outer rings above and below the ring raceway, and ring seal strips are arranged in the ring grooves; The ring is provided with an oil injection hole leading to the annular raceway and an oil nozzle is installed, and the outer wall of the outer ring is provided with a ring gear. 2. The cross-roller type slewing bearing according to claim 1, characterized in that: the upper and lower ends of the ring gear on the outer wall of the outer ring are respectively provided with chamfers.

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