CN105805167A

CN105805167A - Novel bearing with inner-ring conical ball track and outer-ring arc-shaped ball track

Info

Publication number: CN105805167A
Application number: CN201610245891.6A
Authority: CN
Inventors: 赵彦玲; 张士横; 鲍玉冬
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2016-04-20
Filing date: 2016-04-20
Publication date: 2016-07-27

Abstract

The invention relates to a novel bearing with an inner-ring conical ball track and an outer-ring arc-shaped ball track. The novel bearing comprises an inner ring, an outer ring, a holding frame and a rolling body, wherein the rolling body is arranged between the inner ring and the outer ring through the holding frame; the ball track on the inner ring of the novel bearing is of an asymmetric conical structure; the inclined angles of the two sides of the inner-ring ball track are different; a gap is left between the rolling body of the novel bearing and the inner-ring ball track; the cross section of the outer-ring ball track is of a symmetric structure; the bottom of the outer-ring ball track is a linear segment; and the two side surfaces of the outer-ring ball track are arc-shaped. The novel bearing provided by the invention has the advantages that the inclined angles of the two sides of the inner-ring ball track are different, so that the full-surface contact between steel balls and the inner-ring ball track in a steel ball rolling process can be achieved, and then the service life of the steel balls can be prolonged; the gap between the inner-ring ball track and the rolling body can be used for storing surplus lubricating oil or lubricating grease, so that the rolling body can be sufficiently lubricated, the temperature rise caused by friction can be reduced, and the reliability of the novel bearing can be improved; and accordingly, the good working performance of the novel bearing in a high-speed environment can be kept.

Description

A kind of novel inner ring taper outer ring arcuate groove bearing

Technical field

The present invention relates to Design of Mechanical Structure technical field, particularly relate to a kind of Novel ball bearing.

Background technology

Ball bearing, as the machinery basic element of character, is applied extremely wide.Bearing is to play parts that are fixing and that reduce load coefficient of friction in mechanical transmission course.The bearing that commonly uses at present adopts circular arc raceway, and this kind of structure makes the contact area of steel ball and raceway be single area, if raceway generation elastic deformation, contact area area will increase.Rolling element is rolled on raceway and pressure face and rotating direction are open into bending, then will produce the bigger sliding motion added on pressure face, causes that steel ball increases with raceway friction, temperature raises, and film viscosity declines, and oil film is thinning, even can there is oil film breakdown, lubrication failure；When using grease lubrication, the superfluous grease overflowed owing to not having enough cavity to hold, causes rolling element friction to increase equally, reduces bearing service life.

By the known a kind of Multi-contact ball bearing of CN104956105A, its multiple spot performance guarantees bottom the rolling surface of ball under acting on big radial load effect with inner race track and also can prevent the damage of rolling surface of ball when part contact near it, but cannot be avoided steel ball in rotation process contact wear track concentration and affect the durability of steel ball.

By the known angular contact ball bearing of a kind of grease lubrication of CN105209773A, though the lubrication considered in steel ball motor process that this invention is careful, it is not solved by steel ball and causes steel ball to lose efficacy with Internal and external cycle contact wear face Relatively centralized.

It is unsymmetric structure that the present invention devises inner ring raceway, and this structure can make steel ball realize the contact of full surface in the course of the work, increases the service life of bearing.Cavity between rolling element and inner ring raceway can the lubricating oil of excess of storage or grease, make bearing have more superior lubricant effect.

Summary of the invention

For overcoming the deficiencies in the prior art, it is an object of the invention to provide a kind of bearing that can remain stable for and can increase service life in high-speed machine tool.

For achieving the above object, the technical scheme is that a kind of novel bearing, such as Fig. 1, including inner ring (5), outer ring (2), retainer (4) and rolling element (3).Described bearing inner race raceway is asymmetric pyramidal structure, and the angle of inclination of inner ring raceway two sides is different, and by cross section can be seen that upper and lower two cross sections of inner ring for O Point is centrosymmetric, as shown in Figure 2.

By adopting technique scheme, make inner ring raceway and rolling element two-point contact, it is achieved the contact on the full surface of rolling element, overcome the drawback that rotary roll is moved, make full use of rotary roll motion, reduce rub cycle number of times, reducing temperature by the contact of full surface, the fatigue equivalent reducing rolling element endless belt type lost efficacy.

The present invention is further arranged to: between described rolling element (3) and inner ring (5), indwelling has oil groove (6).

By adopting technique scheme, make inner ring raceway have the space storing lubricating oil or grease, can receive and overflow superfluous lubricant, utilize rolling element effectively to supplement owing to temperature raises the rupture of oil film caused with oil lubrication, improve lubricant effect.

The present invention is further arranged to: for straightway (1) inside described outer ring raceway cross section, and two sides (9) and (10) are symmetrical arc.

By adopting technique scheme, reduce the contact area area of elastic deformation, be effectively improved contact area stress distribution, coordinate inner ring raceway to realize the full surface contact of rolling element simultaneously.

Accompanying drawing explanation

Fig. 1 is the overall profile of the present invention.

Fig. 2 is the partial structurtes schematic diagram of the present invention.

Fig. 3 is this overall appearance figure.

Wherein: 1, outer ring raceway；2, outer ring；3, rolling element；4, retainer；5, inner ring；6, oil groove；7, inner ring raceway side and horizontal plane angle；8, inner ring raceway another side and horizontal plane angle；9, outer ring raceway side.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is further described: is illustrated in figure 1 the overall sectional view of the present invention, is made up of outer ring 2, inner ring 5, rolling element 3, retainer 4, and the upper and lower two parts of inner ring raceway cross section are about diagram initial point centrosymmetry.

It is illustrated in figure 2 the enlarged partial sectional view of the present invention, is oil-way 6 between inner ring 5 and rolling element 3.Inner ring raceway cross section is asymmetric taper, and inner ring raceway two sides are unequal with bearing axis angle 7 and 8.Make steel ball while revolving round the sun along raceway by asymmetric tapered raceway, produce lateral rotary roll, in bearing working process, it is achieved the uniform contact on raceway and the full surface of rolling element, thus the even wearing of steel ball surface being dispersed to whole spherome surface, improve the service life of bearing.

Structure as in figure 2 it is shown, there is certain cavity between inner ring 5 raceway and rolling element 3, it is possible to better stores lubricating oil, improves the lubricant effect of bearing.In steel ball rotation process, it is possible not only to realize the uniform lubrication of whole spherome surface, and the steel ball rotation drive whole Bearing inner structure of oil lubrication can be passed through, improve bearing lubrication condition, reduce the noise produced in bearing operation process, improve the service behaviour of bearing.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.

Claims

1. a novel bearing, including inner ring (5), outer ring (2), retainer (4) and rolling element (3), it is characterized in that: described rolling element is placed between outer ring and inner ring by retainer, described inner ring raceway is asymmetric pyramidal structure, described rolling element contacts with inner ring raceway two sides, described outer ring raceway cross section axis is symmetrical, and described rolling element contacts with outer ring raceway medial surface (1).

2. the novel bearing according to claims 1, is characterized in that: the angle of inclination (7) of described inner ring raceway two sides opposite axle bearing axis and (8) are different, symmetrical centered by inner ring cross section relative centre point.

3. the novel bearing according to claims 1 or 2, is characterized in that: be provided with oil groove (6) inside inner ring raceway and between rolling element.

4. the novel bearing according to claims 1, is characterized in that: for straightway (1) inside described outer ring raceway cross section, and two sides (9) are symmetrical arc.