CN202451599U

CN202451599U - Planetary rolling bearing

Info

Publication number: CN202451599U
Application number: CN2012200113947U
Authority: CN
Inventors: 曹毅文
Original assignee: CHANGZHOU DONGFENG BEARING Co Ltd
Current assignee: CHANGZHOU DONGFENG BEARING Co Ltd
Priority date: 2012-01-09
Filing date: 2012-01-09
Publication date: 2012-09-26
Anticipated expiration: 2022-01-09

Abstract

Provided is a planetary rolling bearing. A bearing main body of the planetary rolling bearing comprises an inner ring, an outer ring, a rollway, main rolling columns and auxiliary rolling columns, wherein the inner ring and the outer ring are sleeved together in the mode that the central axes are overlapped. The rollway is formed by the outer side of the inner ring and the inner side of the outer ring, a rolling body in the rollway is formed by the main rolling columns and the auxiliary rolling columns which are in planetary full complement mode, namely the rolling columns are fully distributed in the rollway in the mode that axes of every three rolling columns form a isosceles triangle, and simultaneously column bodies of all the rolling columns are tangent to each other in the axis direction and respectively tangent to the rollway wall. When the bearing works, only rolling friction exists between the main rolling columns and the auxiliary rolling columns and between the main rolling columns and the auxiliary rolling columns and the outer ring and the inner ring, and the existing sliding friction and colliding friction between the rolling body and a retainer are eliminated. Compared with the prior art, the planetary rolling bearing has the advantages that the retainer is eliminated, colliding friction between the rolling body and the retainer is reduced, bearing high temperature time and oil loss time are effectively reduced, and accordingly service life of the planetary rolling bearing is prolonged.

Description

The planet rolling bearing

Technical field

The utility model is a kind of bearing, particularly a kind of planet rolling bearing that comes automatic spacing through the auxilliary roller mode of planetary layout.

Background technique

Rolling bearing have band with not with two kinds of structures of retainer.The large size bearing fitness for purpose is born bigger load, often is not with retainer, and between inside and outside raceway, fills rolling element, and this lets and very easily produces contact friction each other between the rolling element, and the operating life that causes that has increased pivot friction high temperature greatly shortens.Most of middle-size and small-size rolling bearings all have retainer; The main effect one of retainer is that retainer is equally spaced with rolling element; Be distributed on the circumference of raceway when preventing work and directly run foul of each other and rub between rolling element, so that will rub and heating remains on floor level; The 2nd, guiding and drive rolling element normally roll on raceway, and uniform Load distribution and operation quiet, constant speed are provided; The 3rd, at zero load district's guiding rolling element, improve the rolling condition in the bearing, prevent to have destructive slip; The 4th, in the divergence type bearing, rolling element and a lasso are combined, come off to prevent rolling element.Therefore retainer is very important in rolling bearing; But retainer can receive mechanical stress because of friction, strain and inertial force, and they also possibly receive the chemical action of some oiling agent, lubricant additive or its aging product, organic solvent or freezing mixture and the impaired bearing that causes finishes its working life.

Rolling bearing is in real work because high quick-action changes, between all roll pieces and rolling element all produced sliding friction with retainer, outer ring, thereby it is oily to cause that high temperature loses, and causes the bearing bundle extremely to damage.

The model utility content

Deficiency to above-mentioned existing technology; The purpose of the utility model is to save retainer; Utilize the planet arrangement self-align in raceway by roll piece; The motion friction that reduces, thus let bearing main body remain under minimum friction and the heating level, realize prolonging the operating life target of bearing.

The utility model middle (center) bearing main body includes inner ring, outer ring, raceway, main roller, auxilliary roller.The technological scheme of the utility model is that inner ring and outer ring are nested together with the medial axis coincidence system; Raceway is formed with the inboard of outer ring in the inner ring outside; Rolling element in the raceway is that main and auxiliary two groups roller is formed and become planetary and is abound with; The mode that is an isosceles triangle of axle center formation of per three rollers is abound with in raceway, and the shaft of each roller is all also tangent with the raceway wall respectively along the mutual tangent while of axial direction simultaneously.

When bearing working, all have only rolling friction between the major-minor roller and with outer ring, inner ring, there are not the sliding friction and collision friction that exist between original rolling element and the retainer.

Major-minor roller in the raceway is with planetary tangent layout, and making has more space between the rolling element, more helps absorption and stores more lubricating oil, helps the lubricated of bearing.

The beneficial effect that the utility model compared with prior art has is the cancellation retainer, reduces rolling element and its collision friction, effectively reduces bearing high temperature and mistake oil time, thereby prolongs the working life of bearing.

Description of drawings

Fig. 1 is the plan view (B-B cut-away view) of the utility model, comprising outer ring 1, inner ring 2, raceway 3, main roller 4, auxilliary roller 5.

Fig. 2 is the cut-away view (A-A cut-away view) of the utility model, comprising outer ring 1, inner ring 2, raceway 3, main roller 4, auxilliary roller 5.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

As shown in Figure 1, bearing main body comprises outer ring 1, inner ring 2, raceway 3, main roller 4, auxilliary roller 5; Outer ring 1 is formed the bearing main body support with inner ring 2 with medial axis coincidence system fit; The longitudinal section of outer ring 1 is the U type, constitutes the top up and down and the outer wall of raceway 3 by it, and the outside of inner ring 2 constitutes the inwall of raceway 3; The mode that forms an isosceles triangle with the axle center of each bar master roller 4 and two auxilliary rollers 5 is abound with raceway 3; Shaft one side of main roller 4 and the outside of inner ring 2 are that the inwall of raceway 3 is tangent; The shaft of opposite side and two auxilliary rollers 5 is tangent; The shaft of two auxilliary rollers 5 is tangent with the outer wall of raceway 3 again, and main roller 4 is not tangent and possess certain distance with the outer wall of raceway 3.Main roller 4 equates highly that with auxilliary roller 5 the post two ends are spherical shape or coniform simultaneously with shared raceway 3, is to contact to guarantee roller two ends and the true mode of apical grafting up and down of raceway 3, reduces the friction of two ends generation.

The shaft of main roller 4 and auxilliary roller 5 and the inside and outside wall of raceway 3 are not simultaneously all tangent, only are tangential on respectively on inwall or the outer wall, so the shaft of main roller 4 and auxilliary roller 5 all is to have only three axial tangent lines mutually in total simultaneously.

The shaft diameter of main roller 4 and auxilliary roller 5 can transform each other, and promptly main roller 4 shaft diameters can be greater than the shaft diameter of auxilliary roller 5, also can be less than the shaft diameter of auxilliary roller 5.

When bearing working; When inner ring 2 rotates along with the mechanical rotating shaft of tight cover; Doing rotation around the medial axis of self on one side synchronously with inner ring 2 tangent main rollers 4 revolves round the sun around the medial axis of inner ring 2 on one side; Do around self medial axis on one side with the tangent auxilliary roller 5 of main roller 4 and inner ring 2 equidirectional rotations on one side around the medial axis revolution of inner ring 2, like this, all have only rolling friction between all rolling element in the whole planet rolling bearing; Do not have between the original rolling element or sliding friction that exists between rolling element and the retainer and collision friction, thereby realize reducing the target that the inner friction of bearing does not allow the bearing temperature superelevation to increase the service life.

Claims

1. planet rolling bearing; Its bearing main body includes inner ring, outer ring, raceway, main roller, auxilliary roller; Inner ring and outer ring are nested together with the medial axis coincidence system; Raceway is formed with the inboard of outer ring in the inner ring outside; It is characterized in that rolling element in the raceway is that main and auxiliary two groups roller is formed and become planetary and is abound with, the mode that the axle center of promptly per three rollers forms an isosceles triangle is abound with in raceway, and the shaft of each roller is all also tangent with the raceway wall respectively along the mutual tangent while of axial direction simultaneously.

2. planet rolling bearing as claimed in claim 1 is characterized in that the shared raceway of main roller and auxilliary roller.

3. planet rolling bearing as claimed in claim 1 is characterized in that the shaft diameter of main roller and auxilliary roller can transform each other.

4. planet rolling bearing as claimed in claim 1 is characterized in that the shaft of main roller and auxilliary roller all is to have only three axial tangent lines mutually simultaneously in total.