CN202545566U

CN202545566U - Two-row backlining bearing

Info

Publication number: CN202545566U
Application number: CN2012201222053U
Authority: CN
Inventors: 袁伟民; 王海宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-28
Filing date: 2012-03-28
Publication date: 2012-11-21
Anticipated expiration: 2022-03-28

Abstract

The utility model discloses a two-row backlining bearing, by which the defect of short service life of the bearing because the traditional rolling body is nonuniform in stress in a running process is overcome. The two-row backlining bearing comprises an outer ring, an inner ring and rolling bodies assembled between the inner ring and the outer ring through a retainer. The two-row backlining bearing is technically characterized in that the retainer is of a structure of the combination of two single-linkage retainers or a structure of an overall bi-linkage retainer, the periphery of each single-linkage retainer is provided with pin holes in axial distribution, pin shafts assembled in the pin holes are used to connect the two single-linkage retainers together while pocket holes of the two single-linkage retainers are located in a same row all the time, and the axial lines of the rolling bodies in the same row are located on the same axial line; and pocket holes of the overall bi-linkage retainer are always in the same row, and the axial lines of the rolling bodies in the same row are all located on the same axial line. When the bearing is stressed to rotate, each of the two rows of rolling bodies arrive at a maximal stress position at the same time, so that the rolling bodies in each row are uniform in stress in a running process, and the two-row backlining bearing is simple in structure and reasonable in design and is obviously prolonged in service life.

Description

The biserial back lining bearing

Technical field

The utility model relates to a kind of bearing, particularly a kind ofly fits together or the integral duplex retainer through two simply connected retainers, makes the axis of two row rolling elements on the same bearing all be in the long-life biserial back lining bearing on the same axis.It is mainly used in equipment such as milling train.

Background technique

Back lining bearing is used on the equipment such as multi-roll mill widely.Because the structural design of bearing is unreasonable, in the time spent of doing of constantly bearing radial support power and axial force, the problem of bearing inner race, outer ring, rolling element premature fatigue often takes place.Once the someone proposed some and was intended to improve the back lining bearing structural design in working life; Like patent announcement number is in " back lining bearing " of CN201228726Y; Disclose a kind of on existing back lining bearing basis improved bearing; Two ends at bearing increase dust cover and seal ring, have formed labyrinth seal structure.This kind method is through lubricating life-saving, improving the bearing problem in working life so can not fundamentally solve.The bearing low defective in working life that the applicant once existed to existing technology; Designing the patent No. is ZL200910013158.1 " back lining bearing "; Disclose a kind of on existing back lining bearing basis improved bearing; The periphery of duplex and simply connected retainer is provided with the pin-and-hole of axial distribution respectively in the bearing; The bearing pin that utilization is assembled in the said pin-and-hole links together duplex and simply connected retainer, and said duplex that fits together and simply connected retainer pocket hole are positioned at same listing all the time, and the same axis that lists said rolling element is all on same axis.Every row rolling element reached the maximum weighted position simultaneously when this kind method made the stressed rotation of three-row bearing, and just every row rolling element is stressed evenly, and every row rolling element maximum weighted value is reduced, and effectively improved bearing working life, but only to three-row bearing.In " the multiple row spherical roller bearing of band retainer " in the Japan Patent of TOHKEMY 2007-303607A, announced, though the retainer pillar is an one, only for solving rolling element and retainer frictional heating problem.Its retainer is the combined integrate utilization structure, has solid strut and same base ring, and retainer whenever lists a plurality of pillars can only be set, and also just can only form a plurality of pockets hole, just makes also that every row rolling element can only be a plurality of on the double row bearing.This is a kind of self-aligning bearing that is fixed in the bearing support, because selfaligning bearing is prone to produce small skew in operation process, the frictional force between rolling element and the retainer is increased gradually, so bearing temperature constantly raises, this will influence bearing working life.It is disclosed just to adopt this composite cage, attempts retainer is processed the structural type with the base ring and the pocket hole pillar of unlike material, reaches the purpose that reduces the frictional force between rolling element and the retainer.Although the base ring of its retainer and pocket hole pillar link together through rivet, employing be composite structure, in fact still formed a kind of rigid bearing with the bearing of its composition.The retainer of this composite structure; Just in order to make its " base ring is different with the material of pocket hole pillar "; Just adopt the structure of " base ring and pocket hole pillar link together through rivet ", and reach the deficiency that overcomes " base ring in retainer band pocket hole and the friction between the rolling element axial end " that former rigid bearing exists and the purpose of its usability of raising with this.It can not be set to " fixed retainer "; " combined type retainer " can only be set; The pocket hole that is to say the double row bearing of its composition is positioned at same listing; Be to make a kind of structural type that this retainer forms naturally, and there is not the problem of " rolling element is discontinuity in operation process " in this rigid bearing.

The model utility content

The purpose of the utility model provides a kind of biserial back lining bearing; It has overcome rolling element discontinuity in operation process that existing technology exists; Cause bearing low defective in working life; And it is simple in structure, reasonable in design, and Location accuracy is high, easy accessibility, significantly improves the working life of bearing.

The technological scheme that the utility model adopted is: this biserial back lining bearing comprises outer ring, inner ring and is assembled in the rolling element between the inside and outside circle through retainer; Its technological points is: said retainer adopts two simply connected retainers to combine or the structure of integral duplex retainer; The periphery of simply connected retainer is provided with the pin-and-hole of axial distribution respectively; The bearing pin that utilization is assembled in the pin-and-hole links together two simply connected retainers; And making the pocket hole of two simply connected retainers be positioned at same listing all the time, the axis of the same rolling element that lists is all on same axis; The pocket hole of integral duplex retainer is positioned at same listing all the time, and the axis of the same rolling element that lists is all on same axis.

Advantage and the good effect that the utlity model has are: because the utility model can utilize the bearing pin in the two simply connected retainer periphery pin-and-holes; Two simply connected retainers are linked together, make the pocket hole of two simply connected retainers that fit together be positioned at same listing all the time, the axis of the same rolling element that lists is all on same axis; Also can adopt the integral duplex retainer; Make its pocket hole be positioned at same listing all the time, the axis of the same rolling element that lists is all on same axis, so it is simple in structure, reasonable in design; Location accuracy is high, easy accessibility, can make inside and outside circle, rolling element evenly stressed.During the shaft strength rotation; Every row rolling element reaches the maximum weighted position simultaneously on the biserial rolling element; Make each row rolling element stressed even in operation process; Thereby the roller that makes double row bearing rotates to the stressed reduction in any position, and same axis position rolling element is stressed evenly, improves inside and outside circle, rolling element fatigue life.Therefore, the utility model can overcome the bearing low defective in working life that existing technology exists, and reduces maintenance workload, significantly improves the working life of bearing.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a kind of structural representation of the double row bearing that constitutes of a kind of two simply connected retainers of the utility model;

Fig. 2 is the side view of Fig. 1;

Fig. 3 is the structural representation of a kind of simply connected retainer among Fig. 1;

Fig. 4 is the side view of Fig. 3;

Fig. 5 is the structural representation that two simply connected retainers link together through pin-and-hole, bearing pin;

Fig. 6 is a kind of structural representation of the double row bearing that constitutes of a kind of integral duplex retainer of the utility model;

Fig. 7 is the structural representation of a kind of integral duplex retainer among Fig. 6.

Sequence number explanation among the figure: 1 outer ring, 2 inner rings, 3 rolling elements, 4 simply connected retainers, 5 cage pins, 6 spacer rings (back-up ring), 7 pin-and-holes, 8 bearing pins, 9 integral duplex retainers.

Embodiment

Specify the concrete structure of the utility model according to Fig. 1～7.This biserial back lining bearing is improved on existing common shaft bearing structure basis, so be easy to apply.It comprises outer ring 1, inner ring 2 and is assembled in inside and outside circle 2, parts such as rolling element 3, spacer ring (back-up ring) 6 and pin-and-hole 7, bearing pin 8 between 1 through retainer.The specification of each part, size, quantity should be selected to confirm according to designing requirement.The retainer structure that can adopt two simply connected retainers 4 to fit together according to actual usage requirement wherein also can adopt the structure of integral duplex retainer 9.The periphery of the simply connected retainer 4 that employing fits together is provided with the pin-and-hole 7 of axial distribution respectively; The bearing pin 8 that utilization is assembled in the pin-and-hole 7 links together two simply connected retainers 4; And making the pocket hole of two simply connected retainers 4 be positioned at same listing all the time, the axis of the same rolling element that lists 3 is all on same axis.The pocket hole of the integral duplex retainer 9 that adopts is positioned at same listing all the time, and the same axis that lists rolling element 3 is all on same axis.Whenever list the pillar number is set arbitrarily, form any pocket hole number, just make also that every row rolling element number is an arbitrary number on the double row bearing.This biserial back lining bearing is the unconfined flexible bearing in outer ring, and the biserial back lining bearing that is made up of two simply connected retainers 4 has separately cage pin and base ring respectively.The biserial back lining bearing that is made up of integral duplex retainer 9 has separately cage pin and same base ring.

The retainer of the utility model, no matter be two structures that simply connected retainer 4 fits together, or the structure of integral duplex retainer 9; All can make the rolling element 3 stressed unanimity on any position that respectively lists; Therefore, inside and outside circle and the rolling element maximum weighted value having avoided causing because of the rolling element unbalance stress that is interspersed on the existing conventional retainer are excessive, the short-term fatigue phenomenon that very easily produces; Increase inside and outside circle and rolling element fatigue life, prolonged working life.

The utility model biserial back lining bearing is not confined to roller bearing shown in the accompanying drawing, and the double row bearing of other types such as tapered roller bearing is stood good.Simultaneously no outer ring or no inner-ring bearing still had same effect.Modes such as its also available pin-and-hole, bearing pin, screw, spring sheet link together two simply connected retainers.

Claims

1. biserial back lining bearing; Comprise outer ring, inner ring and be assembled in the rolling element between the inside and outside circle through retainer; It is characterized in that: said retainer adopts two simply connected retainers to fit together or the structure of integral duplex retainer; The periphery of the simply connected retainer that fits together is provided with the pin-and-hole of axial distribution respectively; The bearing pin that utilization is assembled in the pin-and-hole links together two simply connected retainers, and makes the pocket hole of two simply connected retainers be positioned at same listing all the time, and the axis of the same rolling element that lists is all on same axis; The pocket hole of integral duplex retainer is positioned at same listing all the time, and the same axis that lists rolling element is all on same axis.