CN203009578U - Convex symmetrical roller globoidal bearing - Google Patents

Abstract

The utility model relates to a bearing, particularly relates to a convex symmetrical roller globoidal bearing with an improved symmetrical roller and inner ring structure, an improved holder structure, and an improved holder pocket contact structure, and belongs to the field of bearing manufacturing. The utility model is characterized in that the outer part is a bearing outer ring; the inner part is a bearing inner ring; the inner ring is provided with two rows of roller paths; three protruding flanges are disposed at the edges of the two rows of roller paths of the inner ring; one oil storage groove is disposed at each side of the middle protruding flange; one oil storage groove is disposed at the inner side of each of the two lateral protruding flanges; an arc spherical port is disposed at a position near the inner ring end face on the outer flange; a holder is disposed between the inner ring and the outer ring; a roller is disposed in a holder pocket. Compared with previous bearings with the same kind, the bearing of the utility model has greatly improved rotating speed; the precision combination of the convex symmetrical roller globoidal bearing ensures the reliability of the transmission of main shaft rotating speed; in case of special working load, the two rows of holders can lead the roller to adjust the barycenter automatically, which improves the bearing rotating speed, reduces friction, and reduces rotation noise.

Description

A kind of convex symmetrical roller cambered surface bearing

technical fieldthe utility model relates to bearing, and concrete a kind of symmetrical roller and inner ring structure, retainer structure, the improved convex symmetrical roller cambered surface of the retainer pocket hole contact structures bearing of relating to, belong to bearing and manufacture field.

background techniquethe spherical bearing generally used at present all comprises bearing inner race, roller and bearing outer ring, retainer, bearing is arranged between bearing inner race and bearing outer ring, be equipped with ring raceway between bearing inner race and bearing outer ring, the ring raceway sectional shape is a circular arc, and the radius of bearing outer ring circular arc is the bearing outer ring ball track diameter for all adopting De/2(De), the inner ring radius is De/2, radius of roller is 0.4925*De.The inner ring radius is greater than the radius of roller, and inner ring is not with centre rib, and retainer is integrated frame, and the ball journal of this structure can bear larger radial load and can bear certain thrust load, and under normal conditions, without impact shock, operating rate is even, the logical type of selecting.This airframe bearing is large in high rotating speed, impact force, under the large environment of vibration force, uses, and a lot of problems occur: 1) retainer is structure as a whole, bearing is easy to cause rotation stuck, and equipment can't work, and can cause the bearing burn when serious, quick-fried axle damages, and brings serious economic loss; 2) symmetrical cone shape is processed in pocket hole shape lower half portion of common retainer design, the combination of fore-end design cylindrical shape, two body intersections form sharp line, part cause roller and retainer pocket interporal lacuna excessive, strength decreased, be stressed stress riser, roller surface and retainer pocket hole surface shape misfit; 3) angle of inclination in retainer end plane angle and pocket hole can not be consistent, and when processing retainer pocket hole, the boring cutter location is inaccurate, and the bore hole precision is low, can not realize that retainer pocket hole and roller angle of revolution coincide.

summary of the inventionthe utility model is in order to overcome the defect of above-mentioned roller ball spherical bearing, and the convex symmetrical roller cambered surface bearing that a kind of rotating mass and rotating accuracy are high is provided.

To achieve these goals, the technical solution of the utility model is: mainly comprise outer ring, inner ring, retainer and roller, it is characterized in that outside is bearing outer ring, inside is bearing inner race, inner ring has two row's raceways, at inner ring two row raceway edges, three protruding ribs are arranged, respectively there is an oil storage tank on intermediate projections rib two sides, respectively there is an oil storage tank protruding rib inboard on both sides, rib,, near the inner ring end, be provided with circular arc ball mouth outside, be provided with retainer between inner ring and outer ring, roller is arranged in retainer pocket hole.

Evenly be provided with oil through on described outer ring, the outer ring arc radius is De/2.

Described inner ring raceway radius of arc is 0.5105De.

Described retainer is two body framves, symmetrical roller shape is processed in the design of pocket hole shape lower half portion, fore-end designs cylindrical combination, the two tangent places of body form slur, retainer root chamfering is circular arc type, bottom, pocket hole guarantees the millimeter at 0.2-0.4 with the gap of roller end face, and retainer is inclined plane shape by the bore hole end face, and the retainer end face is angle of inclination.

Described roller is symplex structure, and radius of arc is 0.485De.

The utility model has following advantage compared to existing technology:

Do not changing under former sphere roller bearing high-mechanic load condition, the optimum work under bad environment, impact force is large, vibrates large environment; Convex symmetrical roller, bearing load, to the heart, does not produce axial thrust load, and spin stabilization in rotary course, work as transient vibration, and roller departs from raceway, pushes away roller by centre rib moment, can make roller return raceway and normally rotate; As two row rollers, wherein during a row stuck phenomenon, in two body retainers, another row retainer can continue rotation with rotation one row roller, to guarantee the normal high speed rotating of bearing, and then has improved again rotating mass and the rotating accuracy of whole bearing.With former similar bearing, compare, the bearing limit speed can improve greatly, has eliminated at bearing load and has changed greatly, the operating conditions of work under bad environment, cause bearing stuck, many drawbacks and the potential safety hazards such as combustion axle, trepan damage, the working life of having improved whole bearing; The combination of the precision of convex symmetrical roller cambered surface bearing, guaranteed to transmit the reliability of spindle speed, and under particular job load, two row retainers can the guide rolls self-aligning, improves the rotating speed of bearing, and can reduce friction, reduces the revolution noise; The convex symmetrical roller cambered surface holder bearing, guaranteed the high speed of transmission main shaft rotating speed, steady, low noise, and mechanical resonant frequency is changed, and reduces the vibrations under the state that runs up, and rotating accuracy is high, and noise is little.

The accompanying drawing explanation

Fig. 1 is the utility model general assembly meaning sketch;

Fig. 2 is the utility model outer ring simplified schematic diagram;

Fig. 3 is the utility model inner ring simplified schematic diagram;

Fig. 4 is that simplified schematic diagram is amplified in the part (I) of the utility model Fig. 3;

Fig. 5 is that simplified schematic diagram is amplified in the part (II) of the utility model Fig. 3;

Fig. 6 is the utility model roller simplified schematic diagram;

Fig. 7 is the utility model retainer simplified schematic diagram;

Fig. 8 is the utility model retainer side simplified schematic diagram;

Fig. 9 is retainer pocket of the present invention hole partial enlarged drawing.

Accompanying drawing explanation: in figure, 1, outer ring, 2, inner ring, 3, retainer, 4, roller, 5, oil through, 6, protruding rib, 7, oil storage tank, 8, circular arc ball mouth.

embodimentfig. 1 to Fig. 5 shows convex symmetrical roller cambered surface bearing simplified schematic diagram, mainly comprise outer ring 1 in figure, inner ring 2, retainer 3 and roller 4, it is characterized in that outside is bearing outer ring 1, inside is bearing inner race 2, inner ring 2 has two row's raceways, at inner ring two row raceway edges, three protruding ribs 6 are arranged, respectively there is an oil storage tank 7 on intermediate projections rib 6 two sides, respectively there is an oil storage tank 7 protruding rib 6 inboards on both sides, rib outside, near the inner ring end, be provided with circular arc ball mouth 7, be provided with retainer 3 between inner ring 2 and outer ring 1, roller 4 is arranged in retainer 3 pocket holes.

Evenly be provided with oil through 5 on described outer ring, outer ring 1 radius of arc is De/2.

Described inner ring 2 raceway radius of arc are 0.5105De.

Described retainer 3 is two body framves, symmetrical roller shape is processed in the design of pocket hole shape lower half portion, fore-end designs cylindrical combination, the two tangent places of body form slur, retainer root chamfering is circular arc type, bottom, pocket hole guarantees the millimeter at 0.2-0.4 with the gap of roller end face, and retainer is inclined plane shape by the bore hole end face, and the retainer end face is angle of inclination.

Described roller 4 is symplex structure, and radius of arc is 0.485De.

Retainer is inclined plane shape by the bore hole end face, and the angle of inclination that the retainer end face is Yu Dou hole, angle of inclination is consistent, and can guarantee when processing retainer pocket hole, the boring cutter accurate positioning, boring cutter is processed perpendicular to end face, and the bore hole precision is higher, and retainer pocket hole and rolling return angle are coincide.Two row retainer retainers are placed on two raceway outsides of inner sleeve, and the inner face of outer ring is contained in the inside, two copper cage n/2 symmetrical pocket holes by n symmetrical roller, these two retainers, and n roller, two raceway inner sleeves form bearing inner assembly.Can make like this rolling element and retainer keep certain control gap, guarantee more accurately the rotating accuracy of rolling bearing; Be different from general bearing, thereby reached under heavy load and severe working environment, bearing can guarantee high strength, high wear resistance, the performances such as high self lubricity, high rotating speed use.Interior astragal centre rib, rotate by inner ring, the rotation of centre rib external diameter guiding retainer, and in retainer work, evenly, relative velocity is little, weares and teares little in rotation, and the life-span is long; Axial float when the high rotating speed of bearing, vibration, the centre rib moment guide rolls of interior astragal angle returns the raceway working area, avoids the stuck and unbalance loading of bearing.In addition, due to centre rib guiding retainer, corresponding the reducing of retainer radial cross section size, save brass material, and retainer weight saving is difficult for producing high temperature in bearing working, and favourable bearing runs well.

Claims (5)

1. a convex symmetrical roller cambered surface bearing, mainly comprise outer ring, inner ring, retainer and roller, it is characterized in that outside is bearing outer ring, inside is bearing inner race, inner ring has two row's raceways, at inner ring two row raceway edges, three protruding ribs are arranged, respectively there is an oil storage tank on intermediate projections rib two sides, respectively there is an oil storage tank protruding rib inboard on both sides, rib,, near the inner ring end, be provided with circular arc ball mouth outside, be provided with retainer between inner ring and outer ring, roller is arranged in retainer pocket hole.

2. a kind of convex symmetrical roller cambered surface bearing according to claim 1, is characterized in that

Evenly be provided with oil through on described outer ring, the outer ring arc radius is De/2.

3. a kind of convex symmetrical roller cambered surface bearing according to claim 1, is characterized in that described inner ring raceway radius of arc is 0.5105De.

4. a kind of convex symmetrical roller cambered surface bearing according to claim 1, is characterized in that

Described retainer is two body framves, symmetrical roller shape is processed in the design of pocket hole shape lower half portion, fore-end designs cylindrical combination, the two tangent places of body form slur, retainer root chamfering is circular arc type, bottom, pocket hole guarantees the millimeter at 0.2-0.4 with the gap of roller end face, and retainer is inclined plane shape by the bore hole end face, and the retainer end face is angle of inclination.

5. a kind of convex symmetrical roller cambered surface bearing according to claim 1, is characterized in that described roller is symplex structure, and radius of arc is 0.485De.

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