CN218152031U

CN218152031U - Bearing

Info

Publication number: CN218152031U
Application number: CN202222757732.8U
Authority: CN
Inventors: 车德礼; 冯德伟; 孙凯; 杜以月; 盖慧琳; 高清海
Original assignee: Wafangdian Zhengda Metallurgical Mill Bearing Co ltd
Current assignee: Wafangdian Zhengda Metallurgical Mill Bearing Co ltd
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2022-12-27
Anticipated expiration: 2032-10-20

Abstract

The utility model discloses a bearing, concretely relates to bearing processing technology field, including the outer lane, inner circle and a plurality of rolling element, the inner circle outside is located to the coaxial cover of outer lane, is provided with the raceway on the medial surface of outer lane and the lateral surface of inner circle respectively, is provided with a plurality of rolling elements in the raceway, and the lateral surface of outer lane includes face of cylinder and two curved surfaces, and two curved surfaces are located the axial both ends of the lateral surface of outer lane respectively, face of cylinder both ends respectively with two curved surface smooth transition connection, and two curved surfaces are about the equal symmetry of the middle cross section and arbitrary axle section on face of cylinder, the end surface area of outer lane is less than the cross sectional area on face of cylinder. The utility model discloses can slow down the stress concentration at bearing inner race edge, reduce the abnormal spoilage of bearing, increase of service life.

Description

Bearing

Technical Field

The utility model relates to a bearing processing technology field especially relates to a bearing.

Background

The bearing is one of the most widely applied and most strictly required fittings in the modern mechanical industry, and is an indispensable basic part in modern metallurgy and mining machinery, so that the bearing needs to have good wear resistance, impact toughness and the like. At present, most bearings are manufactured by adopting a carburizing process, the materials of the bearings can obtain higher surface hardness and wear resistance after being subjected to the carburizing process and quenching treatment, and the cores still keep higher impact toughness so as to bear larger impact load.

When the bearing bears load, the bearing outer ring and the bearing seat generate stress in the radial direction due to interference, and the stress concentration of the edge of the bearing outer ring of the cylindrical surface can be caused under the action of external force, so that the bearing is abnormally damaged, and the service life is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bearing to solve the problem that above-mentioned prior art exists, slow down bearing inner race edge stress concentration, reduce the abnormal spoilage of bearing, increase of service life.

In order to achieve the above purpose, the utility model provides a following scheme:

the utility model provides a bearing, including outer lane, inner circle and a plurality of rolling element, the outer lane is located with the axle sleeve the inner circle outside, the medial surface of outer lane with be provided with the raceway on the lateral surface of inner circle respectively, be provided with a plurality ofly in the raceway the rolling element, the lateral surface of outer lane includes face of cylinder and two curved surfaces, two the curved surface is located respectively the axial both ends of the lateral surface of outer lane, face of cylinder both ends respectively with two the smooth transition of curved surface is connected, and two the curved surface about the middle cross section of face of cylinder and the equal symmetry of arbitrary axle cross-section, the end surface area of outer lane is less than the cross sectional area of face of cylinder.

Preferably, the length of the curved surface in the axial direction of the outer ring is 20-21 mm, the curved surface is a partial surface of a spherical surface, the center of the spherical surface is on the axis of the outer ring and is located on the interface between the cylindrical surface and the curved surface, and the radius of the curved surface is 74-76 mm.

Preferably, the carburized layer depth of the outer ring is 8.1 to 9.2mm, the surface hardness is HRC58 to 61, and the core hardness is HRC32 to 48.

Preferably, the sealing device further comprises sealing check rings, two end faces of the outer ring are provided with annular grooves, and the sealing check rings are fixedly arranged in an annular space between the inner ring and the grooves and seal the two end faces of the outer ring and the inner ring.

Preferably, the rolling elements are cylindrical rollers.

Preferably, the carburizing time of the outer ring is more than or equal to 480h.

Preferably, the thickness of the outer ring is greater than three times the thickness of the inner ring.

Preferably, the inner ring is provided with an oil inlet, and the oil inlet extends to the raceway on the outer side surface of the inner ring and is communicated with the raceway.

The utility model discloses for prior art gain following technological effect:

the utility model provides a bearing, the lateral surface of outer lane have two curved surfaces that are located axial both ends, when the bearing bears the load, the curved surface can furthest avoid outer lane edge stress concentration, reduce the abnormal damage of bearing, increase of service life.

Furthermore, by adopting the outer ring with the carburized layer depth of 8.1-9.2 mm, the surface hardness of HRC 58-61 and the core hardness of HRC 32-48, the bearing load capacity, the wear resistance and the impact toughness of the bearing can be improved by the larger carburized layer depth.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a bearing according to the present invention;

FIG. 2 is an enlarged view of a portion of the outer ring of FIG. 1;

fig. 3 is an enlarged view of a portion a in fig. 2.

In the figure: 1-an outer ring; 2-inner ring; 3-rolling elements; 4, sealing a check ring; 5-oil inlet hole; 6-a retainer ring; 7-curved surface; 8-a cylindrical surface; 9-middle cross section.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model aims at providing a bearing to solve the problem that above-mentioned prior art exists, slow down bearing inner race edge stress and concentrate, reduce the abnormal spoilage of bearing, increase of service life.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

The utility model provides a bearing, including outer lane 1, inner circle 2 and a plurality of rolling element 3, 2 outsides of inner circle are located to 1 coaxial sleeve in outer lane, be provided with the raceway on the medial surface of outer lane 1 and the lateral surface of inner circle 2 respectively, be provided with a plurality of rolling elements 3 in the raceway, the inner circle 2 and the axle cooperation of bearing, outer lane 1 and shell cooperation, rolling element 3 is located and rolls between the track that inner circle and outer lane formed, compare through multiple design, as far as possible many rational arrangement rolling element 3, make the bearing capacity of bearing reach the state of ideality. The outer side surface of the outer ring 1 comprises a cylindrical surface 8 and two curved surfaces 7, the two curved surfaces 7 are respectively located at two axial ends of the outer side surface of the outer ring 1, two ends of the cylindrical surface 8 are respectively in smooth transition connection with the two curved surfaces 7, the two curved surfaces 7 are symmetrical about a middle cross section 9 and any axial section of the cylindrical surface 8, the end surface area of the outer ring 1 is smaller than the cross section area of the cylindrical surface 8, the middle cross section 9 is the cross section of the cylindrical surface 8 in the axial center, the width of the outer side surface of the outer ring 1 is 220mm, the axial length of any curved surface 7 in the outer ring 1 is 20-21 mm, the curved surface 7 can be a partial surface of a conical surface or a partial surface of a spherical surface, when the curved surface 7 is the partial surface of the spherical surface, the spherical center is the intersection point of the axis of the outer ring 1 at the interface of the cylindrical surface 8 and the curved surface 7, and the radius of the sphere is 74-76 mm. The outer side surface of the outer ring is composed of a cylindrical surface 8 and two curved surfaces 7, when the bearing is loaded, the curved surfaces 7 can avoid the edge stress concentration of the bearing to the maximum extent, the abnormal damage rate of the bearing is reduced, and the service life is prolonged.

The utility model discloses in further preferred, through the turner, heat treatment and the organic cooperation of mill technology, reduce the defective work, the production of repair article, furthest reduce cost, make same lasso bearing get different positions and reach different carburization index requirements, guarantee the deep carburization inherent quality of bearing, wherein be no less than 480H to the carburization time of outer lane, the carburization layer degree of depth of outer lane 1 that obtains at last is 8.1 ~ 9.2mm, the surface hardness is HRC58 ~ 61, the core hardness is HRC32 ~ 48, the surface roughness of outer lane and inner circle is 0.125um at most, the H value of every group bearing (the section height of internal diameter to external diameter after eliminating radial play) is the biggest mutual difference and is less than or equal to 0.005 mm, great carburization layer degree of depth, can improve the bearing carrying capacity and good wearability and the impact toughness of bearing.

The utility model discloses in further preferred, the bearing still includes sealing ring 4, annular recess has been seted up to two terminal surfaces of outer lane 1, sealing ring is fixed to be placed in the annular space between inner circle 2 and recess and makes two terminal surfaces of outer lane 1 and inner circle 2 seal, sealing ring 4 outside fixed mounting is in the recess, inboard and 2 lateral surface joints of inner circle, sealing ring 4 can stop the lubricating grease outflow of bearing the inside and stop the dust impurity of outside and enter into the bearing the inside, guarantee the working effect of bearing.

The utility model discloses in further preferred, rolling element 3 is cylindrical roller, when setting up multiseriate track on the medial surface of outer lane 1 and the lateral surface of inner circle 2, separates and fixes through retaining ring 6 between the cylindrical roller, 6 lateral surfaces joints of the outside of retaining ring and 1 medial surface joint in outer lane, inboard and inner circle 2.

The utility model discloses in further preferred, the thickness of outer lane 1 is greater than the thickness of triple inner circle 2, can bear great load.

The utility model discloses in further preferred, the inlet port has been seted up to inner circle 2, the inlet port extend to the raceway on the lateral surface of inner circle 2 and with the raceway intercommunication, can conveniently lubricate the rolling element.

The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for those skilled in the art, the idea of the present invention may be changed in the specific embodiments and the application range. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. The utility model provides a bearing, includes outer lane, inner circle and a plurality of rolling element, the outer lane is coaxial to be located the inner circle outside, the medial surface of outer lane with be provided with the raceway on the lateral surface of inner circle respectively, be provided with a plurality of in the raceway rolling element, its characterized in that: the outer side surface of the outer ring comprises a cylindrical surface and two curved surfaces, the two curved surfaces are respectively positioned at two axial ends of the outer side surface of the outer ring, two ends of the cylindrical surface are respectively in smooth transition connection with the two curved surfaces, the two curved surfaces are symmetrical about the middle cross section and any axial section of the cylindrical surface, and the area of the end surface of the outer ring is smaller than the area of the cross section of the cylindrical surface.

2. The bearing of claim 1, wherein: the length of the curved surface in the axial direction of the outer ring is 20-21 mm, the curved surface is a part of the surface of a spherical surface, the center of the spherical surface is on the axis of the outer ring and is positioned on the interface of the cylindrical surface and the curved surface, and the radius of the curved surface is 74-76 mm.

3. The bearing of claim 1, wherein: the carburized layer depth of the outer ring is 8.1-9.2 mm, the surface hardness is HRC 58-61, and the core hardness is HRC 32-48.

4. The bearing of claim 1, wherein: the sealing device is characterized by further comprising sealing check rings, wherein annular grooves are formed in two end faces of the outer ring, and the sealing check rings are fixedly placed in an annular space between the inner ring and the grooves and enable the two end faces of the outer ring and the inner ring to be closed.

5. The bearing of claim 1, wherein: the rolling bodies are cylindrical rollers.

6. The bearing of claim 3, wherein: and the carburizing time of the outer ring is more than or equal to 480h.

7. The bearing of claim 1, wherein: the thickness of the outer ring is more than three times that of the inner ring.

8. The bearing of claim 1, wherein: an oil inlet hole is formed in the inner ring, extends to the roller path on the outer side face of the inner ring and is communicated with the roller path.