CN201420805Y

CN201420805Y - Full type roller bearing for lifting crane

Info

Publication number: CN201420805Y
Application number: CN2009200715140U
Authority: CN
Inventors: 卢天民
Original assignee: UBC Precision Bearing Manufacturing Co Ltd
Current assignee: UBC Precision Bearing Manufacturing Co Ltd
Priority date: 2009-04-30
Filing date: 2009-04-30
Publication date: 2010-03-10
Anticipated expiration: 2019-04-30

Abstract

The utility model relates to a full type roller bearing for a lifting crane, which comprises two inner races, outer races, sealing covers and a plurality of rollers. The two inner races are mutually butt-jointed, the outer races are arranged outside the inner races, dual-line raceways which are adapted with the rollers are formed between the inner races and the outer races, the sealing covers arerespectively arranged at the two end faces of the dual-line raceways in a covering manner, the plurality of rollers are uniformly arranged in the raceways according to clearances, and the clearance between every two rollers is within 0.01 to 0.03mm so as to form a self-locking structure of the rollers in the dual-line raceways. The full type roller bearing leads the clearances among the rollers tobe respectively within 0.01 to 0.03mm, ensures the rotating clearance of the latter roller pushing and driving the former roller, eliminates large clearances among all the rollers, and thoroughly eliminates impact clash among the rollers. Therefore, the full type roller bearing eliminates a first noise source of high noise; by adopting the structure combining a metal dustproof cover with rubber sealing, the full type roller bearing has extremely good sealing property and overcomes metal clash due to the metal dustproof cover touches the inner and outer races when in rushing.

Description

A kind of hoist crane full type roller bearing

Technical field

The utility model relates to bearing, particularly relates to a kind of hoist crane full type roller bearing.

Background technique

As Fig. 1, no retainer full type roller bearing has the ability of bearing great radial load, is specially adapted to be used on driving, crane, the port machine lifting heavy machinery or mechanical parts.When the characteristics of motion of this bearing is the rotation of lasso drive roller, the roller in back is closelyed follow and is being pushed away previous roller and rotates, therefore there is the impact sound that inevitably produces roller and roller, why full type roller bearing is called full type roller bearing, as the term suggests this bearing should be to arrange one by one to have expired roller in raceway, but in general design, still leave the gap of 1.5～2 rollers in the whole raceway.Therefore, on-stream except existing adjacent rollers to promote the small sound of roller, also may there be one to two impulsive sound between the roller, so the impact sound of the bearing roller in original use is a big defective of this class bearing.

The a little little sound of external imported bearing a bit, and is domestic because the distortion of material material is bigger, and roller rotates to that to impact the distance of going down behind the summit more very loud than loud noise, causes heavy industry machinery industry dare not use homemade bearing.Simultaneously, the rugged environment of expose to wind and rain owing to such bearing is exposed to for a long time, aerial dust flying upward, crane series bearing is without the oil groove oilhole simultaneously, do not adopt oil lubrication system yet, but adopt lifelong lubrication system, therefore require to have the grease proofing effect of good dust-proof, so this bearing adopts double-seal device, but state's inner bearing is because the material non-deformability is relatively poor, the lasso distortion causes the sealing cover distortion when bearing bears big load F, it is that the dustproof anti-oil sealing effect of bearing is relatively poor that grease overflows easily, and this also is the reason that heavy industry machinery dare not use homemade bearing.

Summary of the invention

Technical problem to be solved in the utility model is exactly to provide a kind of hoist crane full type roller bearing for the defective that overcomes above-mentioned prior art existence.

The purpose of this utility model can be achieved through the following technical solutions: a kind of hoist crane full type roller bearing, it is characterized in that, comprise two inner rings connecting, be located at inner ring outer outer ring, sealing cover and several rollers, constitute and the suitable biserial raceway of roller between described inner ring and the outer ring, these biserial raceway both ends of the surface all are covered with a sealing cover, described several rollers evenly are located in the raceway by the gap, the gap of per two rollers is 0.01～0.03mm, forms the self-locking structure of roller in the biserial raceway.

Described sealing cover is the metal dust cover, and it is that transition fit to micro-interference fit contacts with inner ring.

The contacting part of described sealing cover and Internal and external cycle is provided with the caulking gum layer.

Compared with prior art, the utlity model has following advantage:

1, the utility model makes and only leaves 0.01～0.03mm gap between each roller and the roller, to guarantee that a back roller promotes and drive the gap that previous roller rotates, and the big gap of having eliminated 1.5～2 roller diameter sizes between first roller and last roller, this airframe bearing has thoroughly been eliminated the impact Strike note of roller and roller, so the utility model has been eliminated first noise source of the big noise of bearing;

2, the radial internal clearance compression 40%～50% with routine had both guaranteed enough heavily loaded required play like this, overcome again because the distortion of heavily loaded lasso causes play to amplify and caused the roller play to send the roller Strike note, so the utility model has been eliminated second noise source of the big noise of bearing;

3, strengthen about the wall thickness 2mm of outer ring, thereby having significantly reduced the bearing outer ring distortion causes roller play space to increase the chance that causes roller play bump, one has strengthened the heavily loaded ability of bearing of bearing, has also eliminated the 3rd noise source of the big noise of bearing simultaneously;

4, adapt to the inferior position that domestic material material is worse than external famous brand steel (being mainly oxygen content) easy deformation, adopted the steel of home made low-priced to reach the little equal performance of external bearing deformation equally, therefore also eliminated the 4th noise source of the big noise of bearing;

5, adopt the structure of metal dust cover and rubber seal combination, its rigidity of steel plate stamped metal dust cover is strong, the utmost point is not yielding based on adopting for this structure, compares thickness than the skeleton of external similar rubber closure and thickens 2～2.5 times.Therefore non-deformability strengthens greatly, prevented that distortion from having prevented that also grease from leaking outside, simultaneously all scribble rubber layer at crown cap inside and outside circle place, internal diameter cooperates employing transition fit to micro-interference fit to contact tighter outward with bearing inner race between the rib, its sealing is fabulous like this, substantially do not exist and leak the fat phenomenon, added the play that sealing cover has prevented crown cap later on simultaneously, therefore overcome the metal Strike note that metal dust cover play touching Internal and external cycle produces, therefore the utility model has not only improved the sealability of bearing, has also eliminated the 5th noise source simultaneously;

6, trace dwindled roller diameter and by a relatively large margin lengthening roller length, strengthened the roller volume generally greatly, strengthen roller and whole bearing load carrying capacity greatly, make me take charge of this class bearing and can play tonnage and use.

Description of drawings

Fig. 1 is the structural representation of existing full type roller bearing;

Fig. 2 is the forward sight structural representation of existing full type roller bearing;

Fig. 3 is a structural representation of the present utility model;

Fig. 4 is the A-A sectional view of Fig. 3.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

Shown in Fig. 3,4, a kind of hoist crane full type roller bearing, comprise two inner rings 1 connecting, be located at inner ring 1 outer outer ring 2, sealing cover 3 and several rollers 4, constitute and the suitable biserial raceway of roller between described inner ring 1 and the outer ring 2, these biserial raceway both ends of the surface all are covered with a sealing cover 3, described several rollers 4 evenly are located in the raceway by the gap, and the gap L of per two rollers is 0.01～0.03mm, form the self-locking structure of roller in the biserial raceway.

Described sealing cover 3 is the metal dust cover, and it contacts for transition fit to micro-interference fit with inner ring 1; Described sealing cover 3 is provided with the caulking gum layer with the contacting part of Internal and external cycle.

The utility model will be expired roller designs and be changed full roller self-locking structure into and be about to roller diameter and dwindle a little, increase by 2～3 rollers then, promptly fill last roller and be pressed into the back roller and can not drop out in raceway and be roller and be self-locking in raceway in the raceway, this is self-locking structure and prevents that roller from colliding mutually.Bearing end-play is compressed to minimum state, prevents the roller play.Thickening outer ring wall thickness is out of shape bearing and reduces when bearing significant load, prevent roller impact sound.The lengthening roller length is strengthened bearing capacity, is suitable for large tonnage crane.Reinforce sealing cover, adopt the sticking sealing cover structure that scribbles rubber of external diameter in the metal dust cover, the indeformable fat that do not leak of sealing cover when making the distortion of loading ability of bearing lasso.

Claims

1. hoist crane full type roller bearing, it is characterized in that, comprise two inner rings connecting, be located at inner ring outer outer ring, sealing cover and several rollers, constitute and the suitable biserial raceway of roller between described inner ring and the outer ring, these biserial raceway both ends of the surface all are covered with a sealing cover, described several rollers evenly are located in the raceway by the gap, and the gap of per two rollers is 0.01～0.03mm, form the self-locking structure of roller in the biserial raceway.

2. a kind of hoist crane full type roller bearing according to claim 1 is characterized in that described sealing cover is the metal dust cover, and it is that transition fit to micro-interference fit contacts with inner ring.

3. a kind of hoist crane full type roller bearing according to claim 2 is characterized in that the contacting part of described sealing cover and Internal and external cycle is provided with the caulking gum layer.