Double-row tapered roller bearing for railway axle box

Abstract

The double-row tapered roller bearing for the railway axle box comprises an outer ring, an inner ring, a retainer and a plurality of rollers, the retainer comprises a weight reduction groove and a plurality of oil grooves, the weight reduction groove is formed in the end portion of the end, corresponding to the small ends of the rollers, of the retainer and is annularly arranged, and the oil grooves are formed in the end portion of the retainer. The multiple oil grooves are circumferentially distributed in the retainer at intervals, one end of each oil groove communicates with one end of the retainer, and the other end of each oil groove extends to the position close to the other end of the retainer. Aiming at the defects in the prior art, the utility model provides the double-row tapered roller bearing for the railway axle box, which can improve the lubricating efficiency and reduce the weight of the retainer.

Description

TECHNICAL FIELD

[0001] The utility model relates to a double row tapered roller bearing, especially a double row tapered roller bearing for railway axle box. BACKGROUND

[0002] The bearing is an important component for the rotation support of the mechanical body, and the bearing is widely applied in various aspects of our life and work, and the double row tapered roller bearing for railway axle box is one of the bearings, when the railway vehicle runs, the axle box bears the vertical load from the vehicle body, the lateral load of the vehicle running and the axial load generated due to starting, braking, curve driving and the like, and the axle box also needs to be axially positioned to limit the displacement of the axle box in the axial direction and ensure that the relative position between the wheelset and the bogie remains stable, and with the requirement of the localization of the train bearing, the quality of the domestic bearing is also higher and higher, but the bearing of the prior art has the problems of low lubrication efficiency in the process of accelerating rotation, leading to large temperature rise, and large weight of the retainer, which is not conducive to high-speed motion. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides a double row tapered roller bearing for railway axle box which can improve lubrication efficiency and reduce the weight of the retainer.

[0004] To achieve the above-mentioned purpose, the utility model provides a double row tapered roller bearing for railway axle box, which comprises an outer ring, an inner ring, a retainer and a plurality of rollers, the retainer comprises a weight reduction groove and a plurality of oil grooves, the weight reduction groove is arranged at one end of the small end of the corresponding roller of the retainer and is arranged in a ring shape, the plurality of oil grooves are distributed circumferentially on the retainer, one end of the oil groove is communicated with the end of the retainer, and the other end of the oil groove extends to the position close to the other end.

[0005] The advantages of the above technical scheme are that the ring-shaped weight reduction groove is arranged at one end of the small end of the corresponding roller of the retainer, and the plurality of oil grooves are distributed circumferentially on the retainer, the overall material is reduced, the weight of the retainer is effectively reduced, the high-speed operation of the bearing is better adapted, the setting of the oil groove can store lubricating grease, in the process of the operation of the bearing, the lubricating grease can flow to the adjacent roller under the action of the centrifugal force, the roller can be lubricated more quickly, the path of the lubricating grease is shortened, the lubrication efficiency is improved, and the problem of excessive temperature rise of the roller due to insufficient lubrication in the acceleration process is avoided.

[0006] The utility model can be further provided with a recess at the middle part of the corresponding roller.

[0007] Through the further setting, the position of the lubricating grease flowing out can be adjusted through the setting of the recess on the oil groove.

[0008] The present invention can be further configured such that the cross-section of the oil tank is V-shaped.

[0009] With further design, the V-shaped oil groove can guide the flow of grease and also enhance the oil groove's ability to absorb grease to a certain extent.

[0010] The present invention can be further configured such that: the weight reduction groove is provided with a number of reinforcing ribs, and the number of reinforcing ribs are distributed at intervals corresponding to the positions of the oil groove.

[0011] By further designing these reinforcing ribs to be spaced apart at the corresponding oil groove positions, the weight of the cage is reduced while the structural strength of the cage is effectively enhanced, preventing a decrease in strength due to weight reduction and ensuring the stability and reliability of the cage under high-speed operation and complex working conditions.

[0012] The present invention can be further configured as follows: including a sealing cover, the sealing cover including an upper part, a lower part and a protrusion, the upper part and the lower part are both arranged to extend axially corresponding to the bearing, the upper part is sleeved on the outer ring and snapped in place, the lower part is clearance-fitted with the inner ring, and the protrusion is located between the upper and lower parts and extends in a direction away from the roller.

[0013] With further design, the upper part is fitted onto the outer ring and snapped in place, ensuring a secure connection between the sealing cover and the outer ring. The lower part is fitted with the inner ring with a clearance fit, which avoids direct friction with the inner ring and effectively prevents external impurities from entering. The protrusion is located between the upper and lower parts and extends away from the rollers, which increases the internal space and improves the space for grease injection and heat dissipation of the bearing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of one end of the cage in an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0016] Figure 3 This is an embodiment of the present utility model. Figure 2 An enlarged view of part a;

[0017] Figure 4 This is an embodiment of the present utility model. Figure 2 Enlarged view of section b;

[0018] Wherein: outer ring 1; inner ring 2; cage 3; weight reduction groove 31; oil groove 32; recess 321; reinforcing rib 33; roller 4; sealing cover 5; upper part 51; lower part 52; protrusion 53; sealing ring 6. Detailed Implementation

[0019] The embodiment of the double-row tapered roller bearing for a railway axle box comprises an outer ring 1, an inner ring 2, a retainer 3 and a plurality of rollers 4. Figures 1-4 The retainer 3 comprises a weight-reducing groove 31 and a plurality of oil grooves 32.

[0020] The oil groove 32 is provided with a recess 321 at the middle part of the corresponding roller 4.

[0021] The cross section of the oil groove 32 is in a V shape.

[0022] The weight-reducing groove 31 is provided with a plurality of reinforcing ribs 33, and the reinforcing ribs 33 are distributed at intervals corresponding to the positions of the oil grooves 32.

[0023] The sealing cover 5 is composed of a rigid material, and comprises an upper part 51, a lower part 52 and a protruding part 53.

[0024] The above examples are only one of the preferred specific examples of the utility model, and the usual changes and replacements made by the person skilled in the art within the technical scheme of the utility model are all included in the protection scope of the utility model.

Claims

1. A double-row tapered roller bearing for railway axle boxes, comprising an outer ring, an inner ring, a cage, and a plurality of rollers, characterized in that: The cage includes a weight-reducing groove and several oil grooves. The weight-reducing groove is located at one end of the cage corresponding to the small end of the roller and is arranged in a ring. The several oil grooves are circumferentially spaced on the cage. One end of the oil groove is connected to one end of the cage and the other end of the oil groove extends to near the other end.

2. The double-row tapered roller bearing for railway axle boxes according to claim 1, characterized in that: The oil groove has a recess at the middle of the corresponding roller.

3. The double-row tapered roller bearing for railway axle boxes according to claim 1 or 2, characterized in that: The oil tank has a V-shaped cross-section.

4. The double-row tapered roller bearing for railway axle boxes according to claim 1 or 2, characterized in that: The weight-reducing groove is provided with a number of reinforcing ribs, which are distributed at intervals corresponding to the positions of the oil groove.

5. The double-row tapered roller bearing for railway axle boxes according to claim 1, characterized in that: It includes a sealing cover, which includes an upper part, a lower part, and a protrusion. The upper part and the lower part are both arranged to extend axially corresponding to the bearing. The upper part is sleeved on the outer ring and snapped in place. The lower part is clearance-fitted with the inner ring. The protrusion is located between the upper and lower parts and extends in a direction away from the roller.

Images