CN202531654U - Rolling bearing with combined type retaining rack - Google Patents

Abstract

The utility model provides a rolling bearing with a combined type retaining rack, which overcomes the defect of short service life of a bearing in the prior art. The rolling bearing comprises an outer ring, an inner ring, and rolling bodies assembled between the inner ring and the outer ring through the combined type retaining rack; the rolling bearing has the technical points that the combined type retaining rack is at least two duplex retaining racks; the duplex retaining racks are positioned through the external diameters of the rolling bodies and confine at least three rows of rolling bodies to the same axial line; the axial lines of the rolling bodies on the same row are on the same axial line; and alternatively, at least two duplex retaining racks and one single retaining rack are positioned through the external diameters of the rolling bodies and are connected together through pin holes, pin shafts, spring plates or screws so as to confine the rolling bodies on at least four rows of bearings to the same axial line, and to enable the axial lines of the rolling bodies on the same bearing to be on the same axial line. The rolling bearing with the combined type retaining rack has the advantages of reasonable structural design, simple manufacture process, high positioning precision and convenience for assembly and disassembly, and can remarkably prolong the service life of the rolling bear and increase production efficiency of equipment like a rolling mill.

Description

The rolling bearing of band combined type retainer

Technical field

The utility model relates to a kind of rolling bearing, particularly a kind of on same bearing through at least two duplex retainers with rolling element external diameter location, at least three row rolling elements are constrained in the rolling bearing of the band combined type retainer on the same axis.It is mainly used in equipment such as milling train.

Background technique

Rolling bearing is used on the equipment such as milling train widely, comprising single-row, and biserial, three row, four row bearing etc.Bearing is in high speed and high loaded process; Because each parts of bearing are constantly bearing under the stress alternation effect; Inside and outside circle of bearing and rolling element premature fatigue problem often take place, cause bearing to reduce working life, equipment failures such as milling train take place frequently; Increase maintenance workload, thereby influence the usability and the manufacturing efficiency of equipment such as milling train.A large amount of laboratory datas show that this mainly is because unreasonable the causing of structural design of bearing.The retainer pocket hole, inside of existing multiple row (more than or equal to two row) bearing is for being interspersed; This makes rolling element also be the structure that is interspersed; During the shaft strength rotation, the staggered maximum weighted position that reaches of rolling element, such structure increases every row rolling element maximum weighted value; Inside and outside circle of bearing and rolling element stress value are increased, finally make inside and outside circle of bearing and rolling element premature fatigue.For solving inside and outside circle of bearing and rolling element premature fatigue problem; Report according to pertinent literature; Some researchers once proposed to be intended to improve the bearing structural design in working life; For disclosing a kind of improved back lining bearing in CN201228726Y " back lining bearing ", increase dust cover and seal ring like patent announcement number, formed labyrinth seal structure at the two ends of back lining bearing.The public use already of the sealing configuration of this routine is in various mechanical transmission structures; Because of it not only need adopt oil lubrication or oil mist lubrication; And same dimensioned bearings load is reduced; In addition this kind method is through lubricating life-saving, improving the bearing problem in working life so can not fundamentally solve after all.The applicant once was directed against the problem of above-mentioned existence; Designing the patent No. is ZL200910013158.1 " back lining bearing "; Disclose a kind of on the basis of existing back lining bearing 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 pin-and-hole links together duplex and simply connected retainer, makes the duplex that fits together and the pocket hole of simply connected retainer be positioned at same listing all the time, and the axis of the same rolling element that lists 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 find that in practical application it still exists manufacture difficulty big, the problem that Location accuracy is low, and this bearing is only to three-row bearing.In " the multiple row roller bearing of band retainer " of Japan Patent TOHKEMY 2007-303607A; Only for solving rolling element and retainer frictional heating problem, though the retainer pillar is an one, purpose is not to make rolling element be positioned at same listing to its purpose; This product that only under the particular manufacturing process condition, forms; Whenever list a plurality of pillars can only be set, also just can only form a plurality of pockets hole, just make also that every row rolling element can only be a plurality of on the double row bearing.This patent only is a kind of method that solves frictional heating, also can only be directed against double row bearing.

The model utility content

The purpose of the utility model provides a kind of rolling bearing with the combined type retainer; It has overcome the bearing low defective in working life that existing technology exists; Its reasonable in design, manufacturing process is simple, Location accuracy is high, easy accessibility; Significantly improve the efficiency of equipment such as working life and milling train of rolling bearing

The technological scheme that the utility model adopted is: the rolling bearing of this band combined type retainer 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 at least two duplex retainers; Position through the rolling element external diameter, at least three row rolling elements are constrained on the same axis; The axis of the same rolling element that lists is all on same axis.

At least two said duplex retainers and a simply connected retainer position through the rolling element external diameter; And link together with pin-and-hole, bearing pin, shell fragment or screw; At least the rolling element on the four row bearing is constrained on the same axis, and the axis that makes the rolling element on the same bearing is all on same axis.

Row cage pin length in the said duplex retainer is greater than 1/2 of rolling element length, and less than the rolling element total length, another row cage pin length is equal to or less than 1/2 of rolling element length.

Each row cage pin length in the said duplex retainer all is equal to or less than 1/2 of rolling element length.

Row cage pin length in the said duplex retainer is equal to or less than 1/2 of rolling element length, and another row cage pin length is equal to or less than the rolling element total length.

A column length of the single-row retainer that is used with said duplex retainer is greater than 1/2 of rolling element length, less than the rolling element total length.

Advantage and the good effect that the utlity model has are: because at least two duplex retainers of bearing utilization of the utility model position through the rolling element external diameter; At least three row rolling elements are constrained on the same axis, during the shaft strength rotation, make each row rolling element stressed even in operation process; Reduce every row rolling element maximum weighted value; And every row rolling element position consistency on other positions, stressed even, so its reasonable in design; Make the roller of multirow bearing rotate to the stressed reduction in any position and same axis position rolling element is stressed evenly, significantly improve bearing life.Because of it makes inside and outside circle, rolling element evenly stressed, and stressed reduction, prolonged inside and outside circle, rolling element fatigue life, so can overcome the bearing low defective in working life that existing technology exists.The bearing manufacturing process of the utility model is simple, Location accuracy is high, easy accessibility, reduces maintenance workload, significantly improves efficiency of equipment such as milling train.

Description of drawings

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

Fig. 1 is the structural representation of the three-row bearing that positions through the rolling element external diameter of a kind of two I type duplex retainers of the utility model;

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

Fig. 3 is that two row pocket axially bored lines of two I type duplex retainers all are positioned at the same structural representation that lists;

Fig. 4 is two structural representations that I type duplex retainer positions through middle rolling element external diameter;

Fig. 5 is a kind of two I types and the four row bearing structural representation that II type duplex retainer positions through the rolling element external diameter;

Fig. 6 is that two row pocket axially bored lines of two I types and an II type duplex retainer all are positioned at the same structural representation that lists;

Fig. 7 is two I types and the structural representation that II type duplex retainer positions through the rolling element external diameter;

Fig. 8 is that an a kind of I type positions the structural representation that is connected simply connected retainer composition four row bearing again with pin-and-hole, bearing pin with an III type duplex retainer through the rolling element external diameter;

Fig. 9 is that two row pocket axially bored lines of an I type and an III type duplex retainer all are positioned at same listing again and are connected the simply connected retainer with pin-and-hole, bearing pin, makes four row pocket axially bored lines be positioned at the structural representation of same axis;

Figure 10 is that an I type positions the four row bearing concrete structure schematic representation that is connected simply connected retainer composition again with pin-and-hole, bearing pin, shell fragment and screw with an III type duplex retainer through the rolling element external diameter;

Figure 11 is that two row pocket axially bored lines of an I type and an III type duplex retainer are positioned at same listing again and are connected the simply connected retainer with pin-and-hole, bearing pin, shell fragment and screw, makes four row retainer pocket axially bored lines be positioned at the structural representation of same axis.

Sequence number explanation among the figure: 1 outer ring, 2 inner rings, 3 rolling elements, 4 I type duplex retainers, 5 cage pins, 6 spacer rings (back-up ring), 7 pin-and-holes, 8 bearing pins, 9 shell fragments, 10 screws, 11 II type duplex retainers, 12 III type duplex retainers, 13 simply connected retainers.

Embodiment

Specify the concrete structure of the utility model according to Fig. 1～11.The rolling bearing of this band combined type retainer is improved on the architecture basics of existing general rolling bearing, 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) 5, pin-and-hole 7, bearing pin 8, shell fragment 9 and screw 10 between 1 through retainer.The wherein specification of each part, size, quantity should be confirmed according to actual usage requirement.In same rolling bearing, adopt at least two duplex retainers, position through rolling element 3 external diameters, at least three row rolling elements 3 are constrained on the same axis; The axis of the same rolling element that lists 3 is all on same axis.Also can adopt at least two duplex retainers and a simply connected retainer 13 to position through rolling element 3 external diameters; And link together with pin-and-hole 7, bearing pin 8, shell fragment 9 or screw 10; At least the rolling element 3 on the four row bearing is constrained on the same axis, and the axis that makes the rolling element 3 on the same bearing is all on same axis.

Above-mentioned duplex retainer is arranged to I type duplex retainer 4, II type duplex retainer 11, III type duplex retainer 12 according to actual needs; Be that a row cage pin length in the I type duplex retainer 4 is greater than 1/2 of rolling element length; Less than the rolling element total length, another row cage pin length is equal to or less than 1/2 of rolling element length.Each row cage pin length in the II type duplex retainer 11 all is equal to or less than 1/2 of rolling element length.Row cage pin length in the III type duplex retainer 12 is equal to or less than 1/2 of rolling element length, and another row cage pin length is equal to or less than the rolling element total length.

A column length of the single-row retainer 13 that is used with above-mentioned various duplex retainer is greater than 1/2 of rolling element length, less than the rolling element total length.

Adopt two row I type duplex retainers 4 in (shown in Fig. 1～4) in the three-row bearing; Make two row pocket holes of duplex retainer be positioned at same listing (as shown in Figure 3) in the course of working; Rolling element 3 external diameters and location, I type duplex retainer 4 pocket holes make all pocket holes of two duplex retainers be positioned at same listing (as shown in Figure 4) in the middle of when assembling, utilizing.The axis that makes each rolling element that lists 3 of bearing behind the assembling rolling element is all on same axis.

Adopt two row I type duplex retainers 4 and a row II type duplex retainer 11 in (shown in Fig. 5～7) in the four row bearing; Make in the course of working two row pocket holes of three duplex retainers be positioned at same listing (as shown in Figure 6) when assembling, utilize two in the middle of rolling element 3 external diameters locate with three duplex retainer pocket holes, make all pocket holes of three duplex retainers be positioned at same listing (as shown in Figure 7).The axis that makes each rolling element that lists 3 of bearing behind the assembling rolling element is all on same axis..

As stated above, can N+1 row rolling element 3 be constrained in (structural representation slightly) on the same axis with N (natural numbers of N >=2) part duplex retainer through rolling element 3 external diameters location.

Also can adopt two duplex retainers 4,12 to add simply connected retainer 13 again and link together, the rolling element 3 on the four row bearing is constrained on the same axis with pin-and-hole 7, bearing pin 8 (shown in Fig. 8～9) or with pin-and-hole 7, bearing pin 8, shell fragment 9 and screw 10 modes such as (shown in Figure 10～11) through rolling element 3 external diameters location.

Can also be as stated above; With N (natural numbers of N >=2) part duplex retainer and simply connected retainer 13; With pin-and-hole 7, bearing pin 8 or pin-and-hole 7, bearing pin 8, shell fragment 9 and screw 10, make the axis all on same axis (structural representation slightly) of the rolling element 3 of N+1 row bearing.

As stated above, the axis that can make the rolling element 3 on the same bearing [N+1 row bearing (natural numbers of N ≧ 2)] all on same axis, makes the rolling element 3 stressed unanimity on any position that respectively lists.Therefore, avoided the rolling element unbalance stress that is interspersed on the existing conventional retainer, in causing; Outer ring 2,1 and rolling element 3 maximum weighted value are excessive, are easy to generate the tired phenomenon of short-term, in having prolonged; Outer ring 2,1 and 3 fatigue lives of rolling element, also prolonged working life of bearing.The quantity and the specification of retainer 4,11,12,13 pin-and-holes 7, bearing pin 8, shell fragment 9 and screw 10 should be selected according to designing requirement.

The rolling bearing of this band combined type retainer not only is confined to roller bearing shown in the accompanying drawing, and the multirow bearing of other types such as tapered roller bearing is stood good.Also be applicable to simultaneously no outer ring or no inner-ring bearing.No outer ring or no inner-ring bearing still had same effect.

Claims (6)

1. rolling bearing with the combined type retainer; 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 at least two duplex retainers; Position through the rolling element external diameter, at least three row rolling elements are constrained on the same axis; The axis of the same rolling element that lists is all on same axis.

2. the rolling bearing of band combined type retainer according to claim 1; It is characterized in that: at least two said duplex retainers and a simply connected retainer position through the rolling element external diameter; And link together with pin-and-hole, bearing pin, shell fragment or screw; At least the rolling element on the four row bearing is constrained on the same axis, and the axis that makes the rolling element on the same bearing is all on same axis.

3. the rolling bearing of band combined type retainer according to claim 1; It is characterized in that: the row cage pin length in the said duplex retainer is greater than 1/2 of rolling element length; Less than the rolling element total length, another row cage pin length is equal to or less than 1/2 of rolling element length.

4. the rolling bearing of band combined type retainer according to claim 1 is characterized in that: each the row cage pin length in the said duplex retainer all is equal to or less than 1/2 of rolling element length.

5. the rolling bearing of band combined type retainer according to claim 1; It is characterized in that: the row cage pin length in the said duplex retainer is equal to or less than 1/2 of rolling element length, and another row cage pin length is equal to or less than the rolling element total length.

6. the rolling bearing of band combined type retainer according to claim 1 is characterized in that: a column length of the single-row retainer that is used with said duplex retainer is greater than 1/2 of rolling element length, less than the rolling element total length.

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