CN206449118U - A kind of big amount of floating precision cylindrical roller bearing - Google Patents

Abstract

The utility model discloses a kind of big amount of floating precision cylindrical roller bearing, including outer ring, inner ring, retainer and multiple cylindrical rollers, multiple cylindrical roller uniform intervals, which are inlaid on retainer and contacted with outer ring, to be connected, and the inner ring both sides are chamfering structure, and inner ring raceway width increases to 15mm.Above-mentioned big amount of floating precision cylindrical roller bearing has the following advantages that：The amount of floating of bearing is set to reach 4mm by the improvement of bearing arrangement, bearing remains to normal work when the axial amount of floating for requiring axle is more than when 1mm is less than 4mm or the axial installation accuracy error of bearing is larger, the contact length holding of roller and inner ring is constant；By the chamfering structure for changing inner ring both sides, inner ring raceway width increases to 15mm, controls the end-play of bearing in 0.026~0.038mm so as to lift bearing machining accuracy, clearance scope is maintained at 0.012mm, ensure that often set product bearing capacity is approached, so that the performance of main frame is more stable.

Description

A kind of big amount of floating precision cylindrical roller bearing

Technical field

The utility model is related to bearing mnanufacture technical field, specially a kind of big amount of floating precision cylindrical roller bearing.

Background technology

Cylinder roller bearing because the different of rib structure, species are a lot, wherein NU types cylinder roller bearing be inner ring without The type of rib, because inner ring is without rib, during bearing working, bearing inner race can carry out bearing floating in smaller range, because This such bearing is generally used for floating end, is only used as radial positioning and does not make axially position.As shown in Fig. 2 existing circle The inner ring raceway width of post roller bearing 2.2 is 12mm, and respectively there are 3mm slope 2.5 plus the structure of chamfering 2.6, inner ring raceway in its both sides Diameter by31.5 (- 0.033~-0.020) mm, margin of tolerance component outside original 0.013mm (is rolled by 2.1 outer rings, 2.3 Son and 2.4 retainers combine) interior fourth contact diameter Fw sizes (by matching outer ring raceway size and roller diameter size) For31.5 (0~+0.012) mm, so that bearing end-play scope is within 0.020~0.045mm, its end-play scope It is bigger than normal, minimum and maximum difference 0.025mm, during for accurate occasion, clearance scope conference causes every set bearing to bear radial load Roller number differ, make the service life length of bearing mutually more poor.

Utility model content

The technical problems to be solved in the utility model is problems of the prior art, and provides a kind of big amount of floating essence Dense circular cylinder roller bearing, makes the amount of floating of bearing reach 4mm by the improvement of bearing arrangement, big in the axial amount of floating for requiring axle Bearing remains to normal work when 1mm is less than 4mm or when the axial installation accuracy error of bearing is larger, and contact of the roller with inner ring is long Degree keeps constant；By changing the chamfering structure of inner ring both sides, inner ring raceway width increases to 15mm, so as to lift bearing machining Precision controls the end-play of bearing in 0.026~0.038mm, and clearance scope is maintained at 0.012mm, it is ensured that often covers product and holds Loading capability is approached, so that the performance of main frame is more stable.

In order to achieve the above object, the utility model uses such a big amount of floating precision cylindrical roller bearing, including Outer ring, inner ring, retainer and multiple cylindrical rollers, multiple cylindrical roller uniform intervals are inlaid on retainer and contacted with outer ring It is connected, the inner ring both sides are chamfering structure, inner ring raceway width increases to 15mm.

Above-mentioned big amount of floating precision cylindrical roller bearing, including outer ring, inner ring, retainer and multiple cylindrical rollers, it is multiple Cylindrical roller uniform intervals, which are inlaid on retainer and contacted with outer ring, to be connected, and wherein the raceway width of outer ring 01 and cylindrical roller are long Degree is 11mm；To make bearing reach 4mm axial amount of floating, the structure to bearing inner race is improved, by inner ring raceway Both sides 3mm slope adds chamfering structure to be revised as deleting ramp structure, only remains chamfering structure, and inner ring raceway width from 12mm Increase to 15mm；By inner ring raceway diameter by31.5 (- 0.033~-0.020) mm are changed to31.5 (- 0.032~-0.026) Mm, the margin of tolerance is changed to 0.006mm by original 0.013mm, outer component (being combined by outer ring, roller and retainer) it is interior Fourth contact diameter Fw sizes (by matching outer ring raceway size and roller diameter size) by31.5 (0~+0.012) mm are changed to31.5 (0~+0.006) mm, thus by bearing clearance by original 0.020~0.045mm controls new scope 0.026~ Within 0.038mm.

Above-mentioned big amount of floating precision cylindrical roller bearing has the following advantages that：The floating of bearing is made by the improvement of bearing arrangement Momentum reaches 4mm, when the axial amount of floating for requiring axle is more than when 1mm is less than 4mm or the axial installation accuracy error of bearing is larger Bearing remains to normal work, and the contact length holding of roller and inner ring is constant；By changing the chamfering structure of inner ring both sides, inner ring Raceway width increases to 15mm, controls the end-play of bearing in 0.026~0.038mm so as to lift bearing machining accuracy, Clearance scope is maintained at 0.012mm, it is ensured that often covers product bearing capacity and approaches, so that the performance of main frame is more stable.

Brief description of the drawings

Fig. 1 is the structural representation of the big amount of floating precision cylindrical roller bearing of the utility model；

Fig. 2 is the structural representation of the big amount of floating precision cylindrical roller bearing in conventional art.

Embodiment

The utility model is further described below in conjunction with the accompanying drawings：

Embodiment 1

As shown in figure 1, the present embodiment describes a kind of big amount of floating precision cylindrical roller bearing, including outer ring 1.1, inner ring 1.2nd, retainer 1.3 and multiple cylindrical rollers 1.4, multiple cylindrical roller uniform intervals are inlaid on retainer and connect with outer ring Touch and be connected, the inner ring both sides are chamfering structure 1.5, inner ring raceway width increases to 15mm.

Above-mentioned big amount of floating precision cylindrical roller bearing, including outer ring, inner ring, retainer and multiple cylindrical rollers, it is multiple Cylindrical roller uniform intervals, which are inlaid on retainer and contacted with outer ring, to be connected, and wherein the raceway width of outer ring 01 and cylindrical roller are long Degree is 11mm；To make bearing reach 4mm axial amount of floating, the structure to bearing inner race is improved, by inner ring raceway Both sides 3mm slope adds chamfering structure to be revised as deleting ramp structure, only remains chamfering structure, and inner ring raceway width from 12mm Increase to 15mm；By inner ring raceway diameter by31.5 (- 0.033~-0.020) mm are changed to31.5 (- 0.032~-0.026) Mm, the margin of tolerance is changed to 0.006mm by original 0.013mm, outer component (being combined by outer ring, roller and retainer) it is interior Fourth contact diameter Fw sizes (by matching outer ring raceway size and roller diameter size) by31.5 (0~+0.012) mm are changed to31.5 (0~+0.006) mm, thus by bearing clearance by original 0.020~0.045mm controls new scope 0.026~ Within 0.038mm.

Above-mentioned big amount of floating precision cylindrical roller bearing has the following advantages that：The floating of bearing is made by the improvement of bearing arrangement Momentum reaches 4mm, when the axial amount of floating for requiring axle is more than when 1mm is less than 4mm or the axial installation accuracy error of bearing is larger Bearing remains to normal work, and the contact length holding of roller and inner ring is constant；By changing the chamfering structure of inner ring both sides, inner ring Raceway width increases to 15mm, controls the end-play of bearing in 0.026~0.038mm so as to lift bearing machining accuracy, Clearance scope is maintained at 0.012mm, it is ensured that often covers product bearing capacity and approaches, so that the performance of main frame is more stable.

Embodiment described above is a kind of preferably scheme of the present utility model, not makees any to the utility model Formal limitation, also has other variants and remodeling on the premise of without departing from the technical scheme described in claim.

Claims (1)

1. a kind of big amount of floating precision cylindrical roller bearing, including outer ring, inner ring, retainer and multiple cylindrical rollers, Duo Geyuan Post roller uniform intervals, which are inlaid on retainer and contacted with outer ring, to be connected, it is characterised in that the inner ring both sides are chamfering knot Structure, inner ring raceway width increases to 15mm.