CN205559556U - 4 angular contact ball bearing - Google Patents

Abstract

The utility model relates to a machine part, the especially 4 angular contact ball bearing that can bear two -way axial load. This 4 angular contact ball bearing includes bearing inner race, bearing inner race, rolling element, holder and shield, has seted up the outer lane step on this bearing inner race, and the bearing inner race and the bearing inner race homogeneous body constitute. The utility model has the characteristics of rational in infrastructure, it is more convenient that the installation is dismantled, and axial positioning is accurate, can the self -lubricating, maintain that the maintenance is convenient, and radial bearing capacity is great etc.

Description

Four point angular contact ball bearings

technical field

The utility model relates to a mechanical part, in particular to a four-point angular contact ball bearing capable of bearing bidirectional axial loads.

Background technique

Bearings are an important part of contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Four-point contact ball bearing is a kind of angular contact ball bearing that can bear bidirectional axial load. Double-row ball bearings can also bear bi-directional axial loads, and compared with double-row ball bearings, four-point contact ball bearings occupy significantly less axial space. In the case of axial load, four-point contact ball bearings are widely used. The patent document with the publication number CN104033489A discloses a four-point contact bearing full complement ball structure, which has a relatively large load-carrying capacity, but due to the large number of structural parts of the outer ring and the inner ring, the installation and disassembly are complicated, which brings more inconvenience to the use . Another patent document with a publication number of CN103790933A discloses another four-point contact ball bearing. The bearing has two halves of the outer rings on the left and right to limit the spherical rollers in the cage, and the spherical rollers and the inner ring of the bearing are in contact with each other. The contact point, the contact angle is 35°. The bearing can bear the load in any direction of the axial and radial directions, but the installation of the outer ring is complicated. Since the outer ring structure is composed of two halves, the lubricating oil in the internal oil pool is very easy to leak out, which reduces the service life of the bearing.

Contents of the invention

The utility model mainly aims at technical problems such as inconvenient installation and disassembly, lack of axial positioning and inconvenient maintenance in the prior art, and provides a four-point structure with reasonable structure, convenient installation and disassembly, accurate axial positioning and convenient maintenance. Angular contact ball bearings.

In order to achieve the above object, the utility model adopts the following technical solutions:

Four-point angular contact ball bearings include bearing outer ring, bearing inner ring, rolling elements, cage and dust cover. The rolling elements are installed and rolled in the raceways of the bearing outer ring and bearing inner ring, and the rolling elements are evenly separated by the cage. The raceways of the outer ring of the bearing and the inner ring of the bearing are respectively provided with a first curvature and a first radian, and the surface of the rolling element is provided with a second curvature and a second radian, the first curvature is larger than the second curvature, and the first radian is larger than the second radian , There is an outer ring step on the outer ring of the bearing. The raceway of the bearing outer ring and the bearing inner ring can be a peach-shaped cross-section, an elliptical cross-section, or other curved cross-sections. When no load or pure radial load acts, the rolling elements and the outer ring of the bearing and the inner ring of the bearing present a four-point contact; when only the pure axial load acts, the rolling elements and the outer ring of the bearing and the inner ring of the bearing become Two-point contact can bear bidirectional axial load. The outer ring step on the outer ring of the bearing can effectively eliminate the movement caused by the axial clearance deviation.

Preferably, the bearing outer ring and the bearing inner ring are each formed in one piece. The double-half structure of the bearing inner ring used in conventional four-point angular contact ball bearings is changed into an integral structure, which is more convenient for installation and disassembly.

Preferably, the rolling elements are in contact with the raceways of the bearing outer ring and the bearing inner ring respectively, and the contact points form four contact angles in the radial direction of the ball bearing, and the four contact angles are all 25°. Normally, the angle range of the contact angle is between 0°-90°, if the contact angle is selected to be 25°, it can bear greater radial force than other angles, and can also bear a certain axial force at the same time.

Preferably, grease is filled between the outer ring of the bearing and the inner ring of the bearing, and a dustproof cover is provided. When the bearing is lubricated with grease, the dust cover can ensure that the bearing is maintenance-free for life and can reduce the working environment requirements of the bearing.

Preferably, the height and width of the outer ring step are equal in size, and the angle between the two end surfaces of the outer ring step is a right angle. The included angle between the two end surfaces of the steps of the outer ring can be freely selected between 0° and 90°, and the right angle is the best when eliminating the movement caused by the axial clearance deviation. The sharp angle is easy to wear and affect the accuracy after long-term use. The size of the height and width of the steps of the outer ring can also be selected freely, and it is optimal to have the height and width equal.

Preferably, both the outer ring of the bearing and the inner ring of the bearing are provided with oil grooves. Grease can be stored in the oil groove, which can self-lubricate the bearing. Usually, bearings with double-half structure of the inner and outer rings are easy to fall apart, and installation and disassembly are inconvenient. Especially after oil grooves are provided inside the inner and outer rings, the double-half structure bearings are prone to leakage of lubrication grooves after a long time of use. After the outer ring of the bearing and the inner ring of the bearing are used to form an integral structure, the oil groove is sealed in the bearing to avoid leakage.

Therefore, the utility model has the characteristics of reasonable structure, convenient installation and disassembly, accurate axial positioning, convenient maintenance, self-lubrication, and large radial bearing capacity.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Explanation of reference numerals: 1-bearing outer ring, 2-bearing inner ring, 3-rolling element, 4-outer ring step, 5-cage, 6-oil groove, 7-dust cover.

detailed description

In order to further understand the utility model, the preferred embodiment of the utility model is described below in conjunction with the examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, rather than limiting the utility model claims.

The utility model provides a four-point angular contact ball bearing. As shown in the accompanying drawing 1, the bearing outer ring 1 and the bearing inner ring 2 are integrally manufactured from austenitic stainless steel, and the bearing outer ring 1 and the bearing inner ring 2 will be The rolling elements 3 are covered therein, and the rolling elements 3 are evenly separated by the cage 5 . The raceways of the bearing outer ring 1 and the bearing inner ring 2 are arc-shaped, and the rolling body 3 is composed of steel balls. The track has four contact points, and forms four contact angles, and the angles of the four contact angles are equal to 25°. When the four-point angular contact ball bearing has no load or is subjected to a pure radial load, the rolling elements and the outer ring of the bearing and the inner ring of the bearing present a four-point contact; when the pure axial load is applied, the rolling elements and the outer ring of the bearing The ring and the inner ring of the bearing become two-point contact, which can bear bidirectional axial load.

There is an outer ring step 4 on the outer surface of the bearing outer ring 1, the two end faces of the outer ring step 4 are perpendicular to each other, and the height and width of the end faces formed by the outer ring step 4 are equal in size. The step 4 of the outer ring plays the role of axial positioning, and the requirement for the axial clearance of the bearing is not high, which can effectively eliminate the movement caused by the deviation of the axial clearance. The middle part of the bearing outer ring 1 and the bearing inner ring 2 respectively has an oil groove 6 , the opening of the oil groove 6 faces up and down, and contacts with the surfaces of the rolling elements 3 . Lubricating oil is housed in the oil groove 6, and the bearing can be self-lubricated when the bearing is working. A pair of dust-proof covers 7 are installed between the bearing outer ring 1 and the bearing inner ring 2, and the two ends of the dust-proof covers 7 are sealed with the bearing outer ring 1 and the bearing inner ring 2 respectively. The dust cover 7 seals the bearing, reduces the impact of the bearing on the working environment, and increases the service life of the bearing.

The descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (6)

1. A four-point angular contact ball bearing, comprising bearing outer ring (1), bearing inner ring (2), rolling elements (3), cage (5) and dust cover (7), characterized in that: The above-mentioned rolling elements (3) are installed and rolled in the raceways of the bearing outer ring (1) and the bearing inner ring (2), and the cage (5) separates the rolling elements (3) evenly, and the bearing outer ring (1) and the bearing inner ring The raceways of the ring (2) are respectively provided with a first curvature and a first radian, and the surface of the rolling element (3) is provided with a second curvature and a second radian, the first curvature is larger than the second curvature, and the first radian is larger than the second radian , the outer ring of the bearing (1) is provided with an outer ring step (4). 2. The four-point angular contact ball bearing according to claim 1, characterized in that: the bearing outer ring (1) and the bearing inner ring (2) are respectively integrally formed. 3. The four-point angular contact ball bearing according to claim 1 or 2, characterized in that: the rolling elements (3) are in contact with the raceways of the bearing outer ring (1) and the bearing inner ring (2) respectively, The contact points form four contact angles in the radial direction of the ball bearing, and the four contact angles are all 25°. 4. The four-point angular contact ball bearing according to claim 1 or 2, characterized in that: grease is filled between the bearing outer ring (1) and bearing inner ring (2), and a dust cover is provided (7). 5. The four-point angular contact ball bearing according to claim 1 or 2, characterized in that: the height and width of the outer ring step (4) are equal in size, and the angle between the two end faces of the outer ring step (4) is is a right angle. 6. The four-point angular contact ball bearing according to claim 1 or 2, characterized in that oil grooves (6) are provided on both the bearing outer ring (1) and the bearing inner ring (2).