CN205047658U - Double ball formula slewing bearing of abnormal shape - Google Patents

Abstract

The utility model discloses a special-shaped double volleyball type slewing bearing, which comprises an outer ring, an inner ring, steel balls, steel ball isolation blocks, rollers, roller isolation blocks, sealing skins and oil filling cups. The utility model proposes a special-shaped double-row ball type slewing bearing. The axial load and radial load are independently carried by their respective raceways, which reduces the impact of gaps on the life of the raceways and improves the comprehensive performance of the slewing bearing.

Description

A special-shaped double row ball type slewing ring

technical field

The utility model relates to the field of slewing bearings, in particular to a special-shaped double volleyball slewing bearing.

Background technique

As an important basic component of construction machinery and construction machinery, slewing bearing is an important force transmission component necessary for all machines that need to rotate relative to each other and bear axial force, radial force and overturning moment. The slewing bearings are classified according to their structure: single row ball type, three row column type, cross roller type, double row eight point contact ball type. The slewing bearings used in wind power generation are mainly double-row eight-point contact ball slewing bearings. The design bearing angle of this slewing bearing is at 45°. Due to the existence of axial and radial clearances, steel balls and raceways will The actual contact angle becomes larger. The general load on the slewing bearing can be divided into axial force, overturning moment and radial force. The increase of the actual contact angle is beneficial to the axial force, but it is unfavorable to the radial force. Under the action of torque and the increased wear of the raceway during use, the contact point of the steel ball will eventually move to the edge of the raceway, forcing the raceway to collapse, resulting in premature damage to the raceway.

Contents of the invention

The technical problem to be solved by the utility model is to provide a special-shaped double-row ball type slewing bearing. The axial load and radial load are independently carried by the respective raceways, which reduces the impact of the gap on the life of the raceway and improves the comprehensive performance of the slewing bearing.

In order to achieve the above purpose, the utility model proposes a special-shaped double row ball type slewing ring, which includes an outer ring, an inner ring, steel balls, steel ball isolation blocks, rollers, roller isolation blocks, sealing skins and oil filling cups, There are three raceways between the outer ring and the inner ring, which are two steel ball raceways and one roller raceway. The steel balls and steel ball spacers are set in the steel ball raceways, and the rollers and roller spacers In the roller raceway, each raceway is equipped with a grease cup, the joint between the outer ring and the inner ring is sealed by the sealing skin, and the two steel ball raceways are the upper steel ball raceway and the lower steel ball raceway respectively. , the upper steel ball raceway and the lower steel ball raceway are on the same straight line and parallel to the center line of the inner ring, the roller raceway is set between the two steel ball raceways, and the contact angle of the steel ball raceway is 90 degrees, so that The raceway only bears axial force and overturning moment; the bearing direction of the roller raceway is 90 degrees to the steel ball raceway, and only bears radial force.

The utility model is further improved. The outer ring includes an outer upper ring and an outer lower ring. The outer upper ring, the outer lower ring and the inner ring are all rings, and the upper steel ball raceway and the roller raceway are arranged on the outer upper ring. Between the inner ring and the oil filling cup, the oil filling cup is arranged on the outer side of the outer ring.

The utility model is further improved. The inner ring includes an inner upper ring and an inner lower ring. The outer ring, the inner upper ring and the inner lower ring are all ring parts. Between the inner and upper rings, the oil filling cup is arranged on the inner side of the inner ring.

The utility model is further improved, the inner ring is provided with inner teeth.

The utility model is further improved, and the outer ring is provided with outer teeth.

The utility model proposes a special-shaped double-row ball type slewing bearing. The axial load and radial load are independently carried by their respective raceways, which reduces the impact of gaps on the life of the raceways and improves the comprehensive performance of the slewing bearing.

Description of drawings

Fig. 1 is the structural representation of embodiment 1.

Figure 2 is a schematic structural view of Embodiment 2.

Figure 3 is a schematic structural view of Embodiment 3.

Fig. 4 is a schematic diagram of the force on the special-shaped double-volleyball slewing bearing proposed by the utility model.

Fig. 5 is a schematic diagram of the force on the double-row eight-point contact ball slewing bearing in the background technology.

detailed description

Embodiment 1: See accompanying drawing 1, a special-shaped double row ball type slewing bearing, which includes outer ring 12, inner ring 6, steel ball 3, steel ball spacer 4, roller 7, roller spacer 8, sealing skin 5 and oiling oil cup 9, there are three raceways arranged between the outer ring and the inner ring, which are two steel ball raceways and one roller raceway respectively, the steel ball and the steel ball spacer are arranged in the steel ball raceway, The column and the roller spacer are set in the roller raceway, and each raceway is equipped with an oil filling cup, and the joint between the outer ring and the inner ring is sealed by the sealing skin, and the two steel ball raceways are the upper steel ball roller respectively. The upper steel ball raceway and the lower steel ball raceway are on the same straight line and parallel to the center line of the inner ring. The roller raceway is set between the two steel ball raceways. The steel ball raceway The contact angle is 90 degrees, so that the raceway only bears axial force and tipping moment; the bearing direction of the roller raceway is 90 degrees from the steel ball raceway, and only bears radial force. The outer ring includes the outer upper ring 1 and the outer lower ring 2, the outer upper ring, the outer lower ring and the inner ring are all rings, the upper steel ball raceway and the roller raceway are arranged between the outer upper ring and the inner ring, and the oil filling cup is arranged on the outer outside of the circle.

Embodiment 2: See accompanying drawing 2, a special-shaped double-row ball type slewing bearing, which includes an outer ring, an inner ring, steel balls, steel ball spacers, rollers, roller spacers, sealing skins and oiling cups, the outer There are three raceways between the ring and the inner ring, which are two steel ball raceways and one roller raceway respectively. In the roller raceway, each raceway is equipped with a grease cup, and the joint between the outer ring and the inner ring is sealed by the sealing skin. The two steel ball raceways are the upper steel ball raceway and the lower steel ball raceway respectively. The upper steel ball raceway and the lower steel ball raceway are on the same straight line and parallel to the center line of the inner ring. The roller raceway is set between the two steel ball raceways. The contact angle of the steel ball raceway is 90 degrees, so that the The raceway only bears axial force and tipping moment; the bearing direction of the roller raceway is 90 degrees to the steel ball raceway, and only bears radial force. The outer ring includes the outer upper ring and the outer lower ring, and the outer upper ring , The outer and lower rings and the inner ring are both rings, the upper steel ball raceway and the roller raceway are set between the outer upper ring and the inner ring, the oil filling cup is set on the outer side of the outer ring, and the inner ring is set Has internal teeth.

Embodiment 3: See accompanying drawing 3, a special-shaped double-row ball type slewing bearing, which includes an outer ring, an inner ring, steel balls, steel ball spacers, rollers, roller spacers, sealing skins, and oil cups. There are three raceways between the ring and the inner ring, which are two steel ball raceways and one roller raceway respectively. In the roller raceway, each raceway is equipped with a grease cup, and the joint between the outer ring and the inner ring is sealed by the sealing skin. The two steel ball raceways are the upper steel ball raceway and the lower steel ball raceway respectively. The upper steel ball raceway and the lower steel ball raceway are on the same straight line and parallel to the center line of the inner ring. The roller raceway is set between the two steel ball raceways. The contact angle of the steel ball raceway is 90 degrees, so that the The raceway only bears axial force and tipping moment; the bearing direction of the roller raceway is 90 degrees to the steel ball raceway, and only bears radial force. The inner ring includes an inner upper ring 10 and an inner lower ring 11, and the outer ring, inner upper ring and inner lower ring are all rings, the upper steel ball raceway and roller raceway are set between the outer ring and the inner upper ring, and the oil filling cup is set on the inner side of the inner ring; The outer ring is provided with outer teeth.

The utility model proposes a special-shaped double-row ball type slewing bearing. The axial load and radial load are independently carried by their respective raceways, which reduces the impact of gaps on the life of the raceways and improves the comprehensive performance of the slewing bearing.

Claims (5)

1. the double ball-type slewing bearing of abnormal shape, it is characterized in that it comprises outer ring, inner ring, steel ball, steel ball spacing block, roller, roller spacing block, sealing skin and oiling lubricating cup, three raceways are provided with between outer ring and inner ring, be respectively two steel ball rolling channels and a roller path, steel ball, steel ball spacing block is arranged in steel ball rolling channel, roller, roller spacing block is arranged in roller path, every bar raceway is provided with an oiling lubricating cup, outer ring and inner ring connecting part are sealed by sealing skin, article two, steel ball rolling channel is respectively steel ball rolling channel and lower steel ball rolling channel, upper steel ball rolling channel and lower steel ball rolling channel on the same line and with inner ring centerline parallel, roller path is arranged between two steel ball rolling channels, steel ball rolling channel wrapping angle is 90 degree, the loading side of roller path becomes 90 degree to steel ball rolling channel.

2. the special-shaped double ball-type slewing bearing of one according to claim 1, it is characterized in that described outer ring comprises outside upper ring and outer lower ring, outside upper ring, outside lower ring and inner ring are ring, upper steel ball rolling channel and roller path are arranged between outside upper ring and inner ring, and described oiling lubricating cup is arranged on the outside of outer ring.

3. the special-shaped double ball-type slewing bearing of one according to claim 1, it is characterized in that described inner ring comprises interior Shang Quan and Nei Xiaquan, outer ring, interior Shang Quan and Nei Xiaquan are ring, upper steel ball rolling channel and roller path are arranged between outer ring and interior upper circle, and described oiling lubricating cup is arranged on the inner side of inner ring.

4. the special-shaped double ball-type slewing bearing of one according to claim 1 and 2, is characterized in that described inner ring is provided with internal tooth.

5. the special-shaped double ball-type slewing bearing of the one according to claim 1 or 3, is characterized in that described outer ring is provided with external tooth.