CN2391050Y

CN2391050Y - Rolling bearing

Info

Publication number: CN2391050Y
Application number: CN 98241683
Authority: CN
Inventors: 方晓东; 官明喜
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-10-26
Filing date: 1998-10-26
Publication date: 2000-08-09
Anticipated expiration: 2008-10-26

Abstract

The utility model discloses a rolling bearing which is composed of a rolling body 1, an outer ring 4 and an inner ring 2, wherein the surfaces of the rolling body and the inner and the outer rings form a sulfide layer 3 which is in the thickness of 2 to 20 micron and has a plurality of microscopic holes and has low hardness, thereby, the hardness of the surfaces of the rolling body 1, the outer ring 2 and the inner ring 4 is softened. The utility model strengthens lubrication, reduces grind, and prolongs the service life of the rolling bearing.

Description

A kind of rolling bearing

The utility model relates to mechanical transmission part, refers more particularly to rolling bearing.

The rolling bearing driving parts that in mechanical transmission, is absolutely necessary, rolling bearing generally is the rolling element of being made by alloyed steel, inner ring and outer ring combine, rolling element is clipped in inner ring, in the middle of the outer ring, transmission shaft is fixed in the inner ring, by rolling element relatively rotating to the outer ring, realize mechanical transmission, in transmission process, rolling bearing is also born pressure loading except that bearing high speed rotating, rolling element, the working surface of inner ring and outer ring is in the process of running up, all the time be in Frotteurism, owing to be subjected to the pressure of load, it is very serious to wear and tear, it is the easily damaged parts of often changing, in order to strengthen wear resistance, rolling element and Internal and external cycle all will pass through various heat treatments or surface treatment in the hope of improving its surface hardness, but because after the surface hardness raising, its lip-deep micro-bulge hardness also improves thereupon, make the improper abrasion between rolling element and the Internal and external cycle working surface aggravate, the hard particulate that weares and teares then participates in wearing and tearing, make the wearing and tearing of rolling element and Internal and external cycle increase, further shorten its working life, simultaneously because rolling element and Internal and external cycle surface hardness are big, adhere to the oil film ability, make greasy property variation between the rolling bearing, this also is the reason in shortening bearing working life.

The purpose of this utility model provides a kind of only softening rolling element of bearing intensity, Internal and external cycle working surface micro-bulge hardness of not reducing, and improves bearing lubrication, improves the bearing rolling bearing in working life.

In order to achieve the above object, the utility model adopts following structure, rolling bearing is carried out vulcanizing treatment after, have many micropores forming one deck on the rolling element surface, on outer ring working surface and the inner ring working surface, the sulfurized layer of low hardness, the thickness of sulfurized layer is at 2 to 20 microns.

Rolling bearing described in the utility model comprises various ball bearings, roller bearing, needle bearing and tapered roller bearing, and described sulfurized layer can form on inner ring and the surface, outer ring at the rolling element of various ferrous metal formations.

Sulfurized layer has the crystal structure of graphite of being similar to, quality is loose, many micropores, low hardness, be equivalent to solid lubricant, rolling element when rolling bearing, Internal and external cycle is when the high speed transmission, sulfurized layer has been avoided intermetallic direct contact, and can under load pressure, produce translation gliding, on rolling element and Internal and external cycle surface, play the peak load shifting effect, softened hard micro-bulge, increased the real contact area of working surface, make distribution of contact even, stability of rotation, and the sulfurized layer of low hardness can not participate in wearing and tearing, has improved the wearing and tearing of rolling element and Internal and external cycle working surface greatly, because sulfurized layer has microporous structure, be easy to adsorpting lubrication oil, on rolling element and Internal and external cycle surface, form even oil film, thereby strengthened lubricating between rolling element and the Internal and external cycle working surface.

Because the utility model is adopted the structure of having done at rolling bearing rolling element surface table and Internal and external cycle working surface surface increase sulfurized layer, softened its surperficial micro-bulge hardness, strengthened lubricating between the rolling element Internal and external cycle, improve friction and reduced wearing and tearing, thereby improved the combination property of bearing transmission, prolonged the working life of rolling bearing.

Below in conjunction with accompanying drawing in detail the utility model is described in detail.

Fig. 1 is the utility model schematic representation.

As can be seen from Figure 1, the utility model comprises rolling element 1, outer ring 2, inner ring 4, sulfurized layer 3, after rolling bearing is carried out vulcanizing treatment, on the working surface surface of rolling element 1, outer ring 2, inner ring 4, form one deck and have many micropores, the sulfurized layer 3 of low hardness, the thickness of sulphur thing thing layer 3 is 10 microns.

Sulfurized layer can form on the rolling element of all kinds of rolling bearings that various treated ferrous metal are made and Internal and external cycle surface.

Claims

1. a rolling bearing comprises rolling element (1), outer ring (4), inner ring (2), it is characterized in that: on rolling element (1) surface, form one deck on outer ring (4) working surface and inner ring (2) working surface and have many micropores, the sulfurized layer of low hardness (3).

2. rolling bearing according to claim 1 is characterized in that: the thickness of described sulfurized layer (3) is 2 to 20 microns.

3. rolling bearing according to claim 1 is characterized in that: described rolling bearing comprises ball bearing, roller bearing, needle bearing and tapered roller bearing.