CN101782112A

CN101782112A - Pure rolling bearing

Info

Publication number: CN101782112A
Application number: CN200910045428A
Authority: CN
Inventors: 俞大邦
Original assignee: SHANGHAI TIANCHUANGCHUN ROLLING BEARING CO Ltd
Current assignee: SHANGHAI TIANCHUANGCHUN ROLLING BEARING CO Ltd
Priority date: 2009-01-16
Filing date: 2009-01-16
Publication date: 2010-07-21

Abstract

The invention provides a pure rolling bearing with a brand new structure, in particular provides a pure rolling bearing without a retainer or sliding friction for replacing the traditional rolling bearing with the retainer and the sliding friction. The pure rolling bearing comprises an inner ring, an outer ring, a rolling body, a positioning rolling body and a positioning ring. The invention eliminates the sliding friction generated by the traditional rolling bearing using the retainer to carry out space positioning, thereby outstandingly reducing the resistance, the energy consumption and the noises, improving the limit rotation speed, prolonging the service life and obviously enhancing the precision and the reliability of a machine and power equipment using the pure rolling bearing with a brand new structure.

Description

Pure-rolling bearing

The present invention relates to a kind of pure-rolling bearing, particularly relate to a kind of rolling bearing of fricton-tight friction.

Existing rolling bearing is mainly formed with inner and outer ring, rolling element and retainer.For rolling element each other and the relative positioning of rolling element in bearing, existing rolling bearing all has the retainer device, let it be which type of form is structure take for this retainer, all is the rolling element that restricts high-speed motion by sliding friction no matter it uses which type of material and degree of finish.And this sliding-frictional resistance is vital for the influence in bearing performance and life-span.

Slide relative friction between this rolling element and the retainer makes bearing on-stream, particularly when high speed and ultra high speed running, produces a series of problem, as lubricated very difficult; The temperature rise of bearing improves, and noise is big.Rolling element and retainer are under the high temperature and high speed condition, and stress can sharply increase, and the result causes damage of bearings.And rolling frictional resistance relative sliding-frictional resistance wherein in bearing is inappreciable.The existence of this slideway friction also makes the bearing capacity of rolling bearing reduce greatly, energy consumption significantly increases, under the condition of running up, further sharply increase owing to action of centrifugal force makes force of sliding friction between rolling element and the retainer, friction stress is concentrated the rapid destruction that also can cause bearing.Therefore, the raising of the velocity limit of rolling bearing also is subjected to the very big restriction of this force of sliding friction.

The purpose of this invention is to provide a kind of new pure-rolling bearing, it has cancelled common retainer, has replaced the constraint of sliding with the constraint of rolling, thereby has improved the usability of bearing greatly and prolong its working life.

For achieving the above object, the invention provides a kind of pure-rolling bearing, comprise an inner ring, an outer ring and be arranged on inner ring and the outer ring between several rolling elements, it is characterized in that, it also comprises the positioning and rolling body that is arranged between per two adjacent rolling elements and rolls and contact with their, and is arranged on the slideway at positioning and rolling body two ends and the positioning ring that rolls and contact with it.

The present invention finishes like this, between every adjacent rolling element and rolling element, locate rolling element along circumferentially installing one, this positioning and rolling body guarantees circumferential span and the axial position of restriction rolling element in bearing between the adjacent rolling element simultaneously, and the axially locating of this positioning and rolling body and radial location are to finish by the positioning ring on the positioning and rolling body two free end slideways.Positioning ring is a contact with contacting of slideway, and positioning and rolling body centre also is a contact with contacting of rolling element.The positioning and rolling body can be made all-in-one-piece or split type, and positioning and rolling body inside can be made real or hollow.The profile of its arbitrary cross section all is circular, and longitudinal section 5 shapes of this rolling element two ends slideway can be done concavity or convex.This spill or convex can be respectively again V font, single circular arc, Gothic or channel shaped, and V font, single circular arc, Gothic or channel shaped also can be made in the middle of this rolling element and the longitudinal section 7 of the middle slide of rolling element contact segment.Correspondingly, the positioning ring cross section is done concavity or convex.This spill or convex also can be made V font, single circular arc, Gothic or channel shaped, so that roll and to contact location (this contact is a contact) with the cooperation that matches of the two ends slideway of positioning and rolling body.

The raceway cross section of the inside and outside circle of bearing of the present invention is made single circular arc, Gothic, V font or channel shaped.And this inside and outside circle is considered the problem of processing and assembling aspect, also can make integrated type or split type, and promptly integral body is processed or is divided into some splits, is assembled into inside and outside circle after the processing.The positioning and rolling body in use moves, and carries out rotation on the one hand, on the one hand around the bearing axis revolution.Rolling element and the inside and outside circle of bearing are to contact, and the relative speed difference that it had point of contact is zero.The relative speed difference of rolling element and positioning and rolling body point of contact is zero, and the point of contact relative speed difference of positioning and rolling body and positioning ring also is zero, and therefore this motion all belongs to pure rolling, and does not have the slide relative friction, is " pure-rolling bearing " worthy of the name.Installation and processing of the present invention is convenient, and cost is lower, promotion and implementation easily.

Below in conjunction with three preferred embodiments and accompanying drawing the present invention is described in further detail: Fig. 1 is the sectional drawing of positioning and rolling body 2 near the embodiment of outer ring 4, Fig. 2 is that Fig. 3 is the thrust-bearing sectional drawing that the present invention makes the sectional drawing of positioning and rolling body 2 near the embodiment of inner ring 3.

As shown in Figure 1, along circumferential position a positioning and rolling body 2 is installed between per two adjacent rolling elements 1, this positioning and rolling body guarantees circumferential span and the axial position of restriction rolling element in bearing between the adjacent rolling element simultaneously.And the axially locating of this positioning and rolling body and radial location are to finish by being arranged on the slideway 5 of positioning and rolling body two ends positioning ring 6.Positioning ring 6 all is a some contact with rolling element 1 and rolling element 1 with contacting of bearing inner race 3 and outer ring 4 with slideway 5, positioning and rolling body 2, and all is zero at the two articles relative speed difference of all these point of contact.Therefore, this bearing belongs to pure-rolling bearing.

In this embodiment, the longitudinal section of slideway 5 is a V font spill, and the cross section of positioning ring 6 is the circular arc convex, thereby forms the contact of rolling.On the contrary, make that the longitudinal section of slideway 5 is that the cross section of convex and positioning ring is that spill also is feasible.In addition, the roll vertical sectional shape of the middle slide 7 that contacts of slideway 5 and positioning and rolling body 2 and rolling element 1 can be multiple shapes such as V font, single circular arc, Gothic or channel shaped.Inner ring 3 is split type, and the cross section of its raceway is a Gothic, and Fig. 4 is all-in-one-piece, and its raceway cross section is single circular arc.And the raceway cross section of inner ring 3 and outer ring 4 also can be respectively that multiple shapes such as V font, single circular arc, Gothic or channel shaped are so that match with rolling element 1.Obviously, Gothic is compared with single circular arc with the V font, can bear much bigger load, particularly radially with bi-directional axial load.The sectional shape of inner ring 3 and outer ring 4, slideway 5 and slideway 7 can be identical, also can be inequality.Fig. 4-a, Fig. 4-f are single circular arc, and Fig. 4-b, Fig. 4-e are the V fonts, and Fig. 4-c, Fig. 4-g are Gothics.And inner ring 3, outer ring 4 and positioning and rolling body 2 can be made integrated type and split type respectively.

Fig. 2 is that promptly the position radius K of all positioning and rolling bodies 2 is less than the position radius F of rolling element 1 the embodiment of positioning and rolling body 2 near inner ring 3.

For the facility of installing and processing, positioning and rolling body 2 can be made split, for example: the part that will constitute two parts of its end slideway 5 and constitute middle slide 7 is separately made, and combines when the assembling by modes such as interference fit or spiral cooperations.Certainly, also positioning and rolling body 2 can be made integrated type, and install integratedly.

For the facility of installing and processing, can make inner ring 3 or outer ring 4 all-in-one-piece or split type.This positioning ring can be made integrated type or split type also for same consideration.The installation of positioning ring 6 can utilize the resiliently deformable of positioning ring 6 and positioning and rolling body 2, assembles with forced.

Fig. 3 is the thrust-bearing embodiment who makes with this invention.Single circular arc is adopted in inner ring 3 and outer ring 4, bears radially and unidirectional thrust load.

Less than 90 degree, preferable scope is greater than 10 degree greater than 0 degree for α among the figure, β and γ angle, and less than 50 degree.

Though invention has been described in conjunction with three preferred embodiments above, should be appreciated that, those skilled in the art that can make the modification of all equivalences on this basis.Therefore, protection scope of the present invention should be defined by the following claims.

Claims

1. pure-rolling bearing, comprise an inner ring (3), an outer ring (4) and be arranged on inner ring (3) and outer ring (4) between several rolling elements (1), it is characterized in that, it also comprises the positioning and rolling body (2) that is arranged between per two adjacent rolling elements (1) and rolls and contact with their, and is arranged on the positioning ring (6) that the slideway (5) at positioning and rolling body (2) two ends is gone up and rolled and contact with it.

2. bearing according to claim 1 is characterized in that, described positioning and rolling body (2) is all-in-one-piece.

3. bearing according to claim 1 is characterized in that, described positioning and rolling body (2) is split type.

4. bearing according to claim 1 is characterized in that concavity or convex can be done in slideway (5) longitudinal section at the two ends of described rolling element (2).

5. bearing according to claim 1 is characterized in that, the cross section of described positioning ring (6) can be done concavity or convex, so that roll and to contact the location with the cooperation that matches of the slideway (5) of positioning and rolling body (2).And this positioning ring (6) is all-in-one-piece or split type.

6. according to claim 1 or 4 described bearings, it is characterized in that the slideway (5) at described positioning and rolling body (2) two ends and positioning and rolling body (2) can be V font, single circular arc, Gothic or channel shaped with the cross section of the middle slide (7) that rolling element (1) rolling contacts.This positioning and rolling body (2) can be made solid or hollow, and the profile of its arbitrary cross section all is circular.

7. bearing according to claim 1, it is characterized in that, described inner ring (3) and outer ring (4) can be made integrated type or split type simultaneously, or make integrated type and split type respectively, and the raceway cross section of inner ring (3) and outer ring (4) can be made single circular arc, Gothic, V font or channel shaped simultaneously.Also can one of them make wholely, another makes split, and their raceway shape of cross section can be different.

8. bearing according to claim 1 or 5, it is characterized in that, the internal diameter of described positioning ring (6) is the position diameter greater than the diameter of a circle that the centre of sphere passed through or that describe of all rolling elements (1) in this bearing, and then this positioning ring (6) can be fixedly connected into an integral body with inner ring (3).The internal diameter of described positioning ring (6) is less than the diameter of a circle that the centre of sphere passed through or that describe of all rolling elements (1) in this bearing, and then this positioning ring (6) can be fixedly connected into an integral body with outer ring (4).