CN201843908U

CN201843908U - Inner ring of double-row tapered roller bearing

Info

Publication number: CN201843908U
Application number: CN2010205914779U
Authority: CN
Inventors: 王迪; 梅建洛
Original assignee: LUOYANG SBI SPECIAL BEARING CO Ltd
Current assignee: LUOYANG SBI SPECIAL BEARING CO Ltd
Priority date: 2010-11-04
Filing date: 2010-11-04
Publication date: 2011-05-25
Anticipated expiration: 2020-11-04

Abstract

The utility model relates to an inner ring of a double-row tapered roller bearing, which comprises an inner spacing ring and rolling rings symmetrically arranged on the two sides of the inner spacing ring. The rolling rings are annular, the peripheral surfaces of the rolling rings are provided with a boss I and a boss II, raceway surfaces are arranged between the bosses I and the bosses II, hardened layer formed by knocking of a high-frequency hammerhead are arranged on the raceway surfaces, the thickness of the hardened layers is 0.5-1.5mm, a sunken groove is respectively arranged at a contact position between the boss I and the raceway surface and at a contact position between the boss II and the raceway surface, and the raceway surfaces are arranged inclined on the rolling rings. Since the hardened layers formed by knocking of the high-frequency hammerhead are arranged on the raceway surfaces, metal structures on the raceway surfaces of the bearing can have micro plastic deformation, the waviness of the surfaces of work pieces gradually decreases, the surfaces of the work pieces can reach the surface quality of a mirror, the bearing capacity is increased by more than 10 percent, and the service life of the bearing is prolonged by more than 30 percent.

Description

A kind of double-row conical bearing inner ring

Technical field

The utility model relates to a kind of double-row conical bearing, specifically a kind of double-row conical bearing inner ring.

Background technique

At present, in the existing double-row conical bearing processing, because the precision of bearing is mainly reflected on the raceway, particularly the roughness on the surface of raceway and accuracy to shape are the major criterions of weighing bearing accuracy and quality.Quenching processing technology behind the finish turning that China adopts at present, because the quenching phenomenon easily forms cold crack, and, quenching is used proper to thickness, the less part of diameter, for the bigger part of diameter, the depth of quenching is not enough, and therefore the bearing race after the processing is fragile.And the double-row conical bearing inner ring is owing to unreasonable structure in the prior art, and the set-up mode of its roller surface and roughness all do not reach requirement, therefore causes the lower and quick abrasion of this kind bearing accuracy, increases the economic burden of enterprise virtually.

The model utility content

The purpose of this utility model provides a kind of double-row conical bearing inner ring, and it is simple in structure, and when improving the bearing running accuracy, improved more than 30% its working life.

The utility model is for realizing the model utility purpose, the technological scheme that adopts is: a kind of double-row conical bearing inner ring, form by cone spacer and the rolling ring that is symmetricly set on the cone spacer both sides, described rolling ring is an annular, external peripheral surface at rolling ring is provided with boss I and boss II, between boss I and boss II, be provided with a roller surface, on roller surface, be provided with the hardened layer that the hammering of high frequency tup forms, the thickness of this hardened layer is 0.5～1.5mm, the contacting point of boss I and boss II and roller surface is provided with hollow slot, and described roller surface is inclined to set on rolling ring.

The surface roughness Ra value of described hardened layer≤0.1 μ m.

The height of described boss II is greater than the height of boss I.

Described roller surface, its inclination are the 9-17 degree.

Because conventional roller surface adopts finish turning processing rear surface Quenching Treatment, relatively poor and the easily formation cold crack of back that quenches of surface quality after this kind processes, raceway face is crisp firmly, be in the roller contact process, be easy to damage, therefore, this kind bearing reduces working life greatly, and the utility model is provided with by the hammering of high frequency tup on the roller surface top layer and forms one deck hardened layer, make the top layer metal structure of race way produce the plastic deformation of trace, it is smooth that the waviness of workpiece surface tends to further, thereby reach the surface quality of minute surface, so, this roller surface not only makes bearing running accuracy height, and has promoted the working life of bearing.

The beneficial effects of the utility model are:

1, the utility model is made up of cone spacer and the rolling ring that is symmetricly set on the cone spacer both sides, external peripheral surface at rolling ring is provided with boss I and boss II, between boss I and boss II, be provided with a roller surface, and the contacting point at boss and roller surface is provided with hollow slot, this kind structure has better guaranteed the running accuracy of this kind bearing, improves bearing working life.

2, this roller surface top layer is provided with by the hammering of high frequency tup and forms one deck hardened layer, make the top layer metal structure of race way produce the plastic deformation of trace, it is smooth that the waviness of workpiece surface tends to further, thereby reach the surface quality of minute surface, adopt this technology can make the metal structure on raceway top layer fine and close more, the raceway roughness is promoted 3 more than the grade, roughness Ra value can reach 0.1 μ m, even reach below the 0.1 μ m, the micro-penetration hardness of raceway face is improved more than 20%, improved the contact fatigue property of raceway.Thereby improved its bearing capacity more than 10%, bearing life improves more than 30%.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of usage mode of the present utility model;

Mark among the figure: 1, cone spacer, 2, rolling ring, 3, boss I, 4, boss II, 5, roller surface, 6, hardened layer, 7, hollow slot, 8, inner ring, 9, the outer ring, 10, rolling element, 11, retainer.

Embodiment

As shown in Figure 1, a kind of double-row conical bearing inner ring, form by cone spacer 1 and the rolling ring 2 that is symmetricly set on cone spacer 1 both sides, described rolling ring 2 is annular circle body, on the outer peripheral surface of each rolling ring 2, be equipped with boss I 3 and boss II 4, boss I 3 and boss II4 are respectively around 2 one weeks of rolling ring, therefore on rolling ring 2 external diameters, form two fins, between boss I 3 and boss II 4, be provided with a roller surface 5, on roller surface 5, be provided with the hardened layer 6 that the hammering of high frequency tup forms, the thickness of this hardened layer 6 is 0.5～1.5mm, boss I 3 and boss II 4 are provided with hollow slot 7 with the jointing place, edge of roller surface 5, and roller surface 5 is inclined to set on the outer diametric plane of rolling ring 2.

The surface roughness Ra value of described hardened layer 6≤0.1 μ m.

The height of described boss II 3 is greater than the height of boss I 4.

Described roller surface 5, its inclination is the 9-17 degree, the angle that is this roller surface 5 and rolling ring axis is the 9-17 degree.

Fig. 2 is the structural representation of usage mode of the present utility model, constituted double-row conical bearing by inner ring 8, outer ring 9, rolling element 10 and retainer 11, wherein inner ring 8 is made of cone spacer 1 and the rolling ring 2 that is symmetricly set on the cone spacer both sides, cone spacer mainly is an assembling height of adjusting play and bearing, and rolling ring 2 mainly is the parts of carrier roller running.

Hardened layer on the roller surface described in the utility model is to be formed by the hammering of high frequency tup, the high frequency tup is the vibratory tool head, this vibratory tool head carries out the hammering of ultra-high frequency to race way greater than 30,000 times vibration frequency with per second, when the surface of vibratory tool head with the vibration hammering bearing race of high frequency, make the top layer metal structure of race way produce the plastic deformation of trace, it is smooth that the waviness of workpiece surface tends to further, make the roller surface top layer form one deck hardened layer, this technology is to be media becomes radial spread in the metal surface a kind of quantum with the finish, its effect is to make the electronic shell of metallic material atom absorb this quantum, the electronic shell activity is more active, atomic nucleus is relative with the electronic shell combination force to diminish thereby cause, the combination force of atom and atom diminishes, metallic material plasticity under the effect of this quantum changes, and ductility improves.Adding frequency in addition again is the high frequency vibration of 30KHz, when vibration transducer detects the dither of amplitude 3-5 micron, promptly this state is an optimum Working, the micro-penetration hardness of raceway face improves more than 20% before the processing simultaneously, the roughness that the roughness ratio of raceway generally grinds out improves 3 more than the grade, roughness Ra value can reach 0.1 μ m, even reaches below the 0.1 μ m, and the more traditional abrasive process of work efficiency improves more than 50%.

The utility model, it is simple in structure, and roller surface is provided with rationally, especially is provided with on roller surface by high frequency tup hammering formation hardened layer and has better solved difficult problems such as the bearing running accuracy is not high and easy to wear.

Claims

1. double-row conical bearing inner ring, it is characterized in that: form by cone spacer (1) and the rolling ring (2) that is symmetricly set on cone spacer (1) both sides, described rolling ring (2) is an annular, external peripheral surface at rolling ring (2) is provided with boss I (3) and boss II (4), between boss I (3) and boss II (4), be provided with a roller surface (5), on roller surface (5), be provided with the hardened layer (6) that the hammering of high frequency tup forms, the thickness of this hardened layer (6) is 0.5～1.5mm, boss I (3) and boss II (4) are provided with hollow slot (7) with the contacting point of roller surface (5), and described roller surface (5) is inclined to set on rolling ring (2).

2. a kind of double-row conical bearing inner ring according to claim 1 is characterized in that: the surface roughness Ra value of described hardened layer (6)≤0.1 μ m.

3. a kind of double-row conical bearing inner ring according to claim 1 is characterized in that: the height of described boss II (3) is greater than the height of boss I (4).

4. a kind of double-row conical bearing inner ring according to claim 1 is characterized in that: described roller surface (5), its inclination are the 9-17 degree.