CN203548564U

CN203548564U - Highly-deviated small-flange tapered roller bearing

Info

Publication number: CN203548564U
Application number: CN201320724121.1U
Authority: CN
Inventors: 吴玉东; 张玉清
Original assignee: SHANDONG XINGTAI BEARING Co Ltd
Current assignee: SHANDONG XINGTAI BEARING Co Ltd
Priority date: 2013-11-18
Filing date: 2013-11-18
Publication date: 2014-04-16
Anticipated expiration: 2023-11-18

Abstract

The utility model provides a highly-deviated small-flange tapered roller bearing, comprising a bearing inner race, a rolling body and a small flange, wherein the end portion of the bearing inner race extends outwards to form the small flange; an oil groove is formed between the root part of the small flange and the outer surface of the bearing inner race; the rolling body is arranged on the outer surface of the bearing inner race; the end portion of the rolling body is just located above the oil groove; the end face of the rolling body is not in contact with the inner side surface of the small flange and an acute included angle is formed between the rolling body and the small flange; the distance between the end face of the rolling body and the top of the small flange is greater than the distance between the end face of the rolling body and the root part of the small flange so that the top of the small flange is protected against the impact force of the rolling body. The highly-deviated small-flange tapered roller bearing has the advantages that the thickness and the strength of the root part of the small flange are improved and the inclination of the inner side surface of the small flange is increased so that the top of the small flange is protected against the impact force of the rolling body, and therefore, the acting force of the rolling body on the small flange is reduced and the breakage of the flange caused by design factors during assembly is avoided.

Description

The large little rib tapered roller bearing of gradient

Technical field

The utility model relates to bearing, is specifically related to a kind of large little rib tapered roller bearing of gradient.

Background technique

At present, the shape of the little rib of tapered roller bearing is mostly designed to, and the relative inner ring plane of little rib inner side surface is gradient, but is parallel to rolling element end face, and it is very large that this structure shape makes the vibration of rolling element impact little rib, as shown in Figure 1.But because bearing is a standard piece, its structure and size no one go to revise, at bearing after the assay was approved, once find that the little rib of assembling bearing is cracked, just think that client assembles problem improperly, in fact with structure and the shape of little rib, be relative.

Through large component analysis, find that the little rib of bearing exists following defect: 1, oil duct shape does not have standard, just indicates and there is no wedge angle, and the uncertain of oil duct shape causes the stressed decomposition of rib widely different like this; 2, due to rolling element end face and little rib parallel sided, each position of little rib inner side surface all may be subject to impact force, if when assembling rolling element axial float can produce very large impact force, when the top of impact force action at little rib inner side surface, little rib can cracked inefficacy.

Model utility content

The utility model, for the deficiencies in the prior art part, provides a kind of large gradient little rib tapered roller bearing.

The little rib tapered roller bearing of large gradient disclosed in the utility model, the technological scheme that solve the technical problem employing is as follows: comprise bearing inner race, rolling element and little rib, wherein bearing inner race end stretch out form little rib, between the root of little rib and the outer surface of bearing inner race, form oil duct, rolling element is arranged on the outer surface of bearing inner race, and the end of rolling element is just in time positioned at oil duct top and does not contact with the inner side surface of little rib; Between described rolling element end face and the inner side surface of little rib, there is acute angle shape angle, distance between rolling element end face and little rib top is greater than the distance between itself and little rib root, so that the top of little rib is not subject to the impact force of rolling element, can avoid so little rib top stressed and cracked.

Further, in order to increase oil duct described in the thickness of little rib root and intensity, there is canonical shapes, the diameter of this oil duct bottom circular arc be greater than oil duct Extreme breadth 1/2 and be less than 2/3 of oil duct Extreme breadth, oil duct bottom cambered surface and oil duct inner side surface and oil duct inner side surface and all abundant rounding ofves of little rib inner side surface.

Further, the acute angle shape angle between described rolling element end face and little rib inner side surface is elected the angle of 5-10 ° as.

The beneficial effect that the little rib tapered roller bearing of large gradient disclosed in the utility model has is: the utility model has been strengthened thickness and the intensity of little rib root, the inclination that has increased little rib inner side surface makes little rib top no longer be subject to the impact force of rolling element, effectively reduce the active force of rolling element to little rib, avoided the rib that caused in when assembling by design factor cracked.

Accompanying drawing explanation

The partial sectional view that accompanying drawing 1 is existing tapered roller bearing;

Accompanying drawing 2 is the partial sectional view of the little rib tapered roller bearing of the large gradient of the utility model;

Accompanying drawing 3 is the free-body diagram of the little rib of large gradient described in the utility model;

Accompanying drawing mark explanation: 1, bearing inner race; 2, rolling element; 3, little rib; 4, oil duct; W, oil duct Extreme breadth; L, little rib root thickness-adding.

Embodiment

Below in conjunction with accompanying drawing, the little rib tapered roller bearing of the disclosed large gradient of the utility model is described in further details.

The little rib tapered roller bearing of large gradient described in the utility model, its structure as shown in Figure 2, comprise bearing inner race 1, rolling element 2 and little rib 3, wherein bearing inner race 1 end stretch out form little rib 3, between little rib 3 roots and the outer surface of bearing inner race 1, form oil duct 4, rolling element 2 is arranged on the outer surface of bearing inner race 1, and the end of rolling element 2 is not just in time contacting above oil duct 4 and between the inner side surface of little rib; The utility model has increased the inclination of little rib inner side surface, between described rolling element end face and little rib inner side surface, there is acute angle shape angle, distance between rolling element end face and little rib top is greater than the distance between itself and little rib root, so that the top of little rib is not subject to the impact force of rolling element, avoid so little rib top stressed and cracked.Further, in order to increase thickness and the intensity of little rib root, the utility model standard the shape of described oil duct, the diameter of oil duct bottom circular arc be greater than oil duct Extreme breadth 1/2 and be less than 2/3 of oil duct Extreme breadth, oil duct bottom cambered surface and oil duct inner side surface and oil duct inner side surface and little rib inner side surface be abundant rounding off all, has improved like this stress distribution of little rib root.

The utility model has strengthened the angle between little rib inner side surface and rolling element end face, optimal case is, angle between rolling element end face and little rib inner side surface is the angle of 5-10 °, and this suitable angle can allow rolling element greatly reduce the impact force of little rib.

For the oil duct in bearing described in the utility model, can design specialized oil duct cutter, process the oil duct with canonical shapes, and the abundant rounding off of the root that guarantees little rib inner side surface, having improved the stress of little rib after stressed decomposes, and make little rib root thickness increase by 10%, also corresponding raising more than 10% of bearing capacity.Originally top, middle part or the root of the medium and small rib of design all may be subject to the impact force of rolling element, and the impact failure maximum of impact force to little rib top, easily cause little rib cracked; The utility model changes rolling element end face after the angle that has 5-10 ° into by parallel with little rib inner side surface, rolling element no longer exists the impact at little rib top, force bearing point mainly concentrates on little rib root, the arm of force of little rib root has obvious shortening compared with the arm of force at top, effectively reduces the action effect of impact force; As shown in Figure 3, suppose that rolling element is F to the impact force of little rib root, because little rib inner side exists, F is decomposed into Fx and Fy, and only Fx exists and impacts rib, and strength has reduced 5%, in addition owing to there being the rounding off of Fy and little rib root, under good degree of finish and lubricating condition, Fy can produce a moment of torsion to Fx, has greatly alleviated again the impact of Fx to rib.Therefore the utility model does design rolling element is reduced more than 70% the impact force of rib, has avoided the rib that caused by design factor cracked completely.

In addition, in the utility model, when determining the angle of rolling element end face and little rib inner side surface, guarantee rolling element sequence of sanqu songs within a particular musical mode not after assembling, therefore different series bearing, its angle will have suitable variation.

Except technical characteristics described in the utility model, be the known technology of those skilled in the art.

Claims

1. the large little rib tapered roller bearing of gradient, comprise bearing inner race, rolling element and little rib, wherein bearing inner race end stretch out form little rib, between the root of little rib and the outer surface of bearing inner race, form oil duct, rolling element is arranged on the outer surface of bearing inner race, and the end of rolling element is just in time positioned at oil duct top and does not contact with the inner side surface of little rib, it is characterized in that, between described rolling element end face and the inner side surface of little rib, there is acute angle shape angle, distance between rolling element end face and little rib top is greater than the distance between itself and little rib root, so that the top of little rib is not subject to the impact force of rolling element, can avoid so little rib top stressed and cracked.

2. the little rib tapered roller bearing of large gradient according to claim 1, it is characterized in that, the diameter of described oil duct bottom circular arc be greater than oil duct Extreme breadth 1/2 and be less than 2/3 of oil duct Extreme breadth, oil duct bottom cambered surface and oil duct inner side surface and oil duct inner side surface and all abundant rounding ofves of little rib inner side surface.

3. the little rib tapered roller bearing of large gradient according to claim 1, is characterized in that, the acute angle shape angle between described rolling element end face and little rib inner side surface is elected the angle of 5-10 ° as.