Self-sealing double-row tapered roller bearing

Abstract

The self-sealing double-row tapered roller bearing comprises an outer ring, an inner ring, a retainer, a retainer ring and a plurality of rollers, the retainer ring comprises an upper part, a lower part and a convex part, the upper part and the lower part are arranged corresponding to the axial extension of the bearing, the upper part is sleeved on the outer ring and is clamped and positioned, and the lower part is sleeved on the outer ring and is clamped and positioned by the convex part. The lower part is in clearance fit with the inner ring, a plurality of sealing rings are arranged between the lower part and the inner ring, the plurality of sealing rings are arranged at intervals along the inner ring, the sealing rings are respectively in interference butt joint with the lower part and the inner ring, and the convex part is positioned between the upper part and the lower part and extends towards the direction far away from the roller. Aiming at the defects in the prior art, the utility model provides the self-sealing double-row tapered roller bearing which is larger in grease injection space and heat dissipation space and better in sealing effect.

Description

Technical Field

[0001] This utility model relates to a double-row tapered roller bearing, and more particularly to a self-sealing double-row tapered roller bearing. Background Technology

[0002] Bearings are essential components used for rotating support in machinery. They are widely used in all aspects of our lives and work. For example, self-sealing double-row tapered roller bearings are crucial in railway vehicle operation. The axle box is subjected to vertical loads from the car body, lateral loads from vehicle movement, and axial loads generated by starting, braking, and cornering. Furthermore, axial positioning of the axle box is necessary to limit its axial displacement and ensure a stable relative position between the wheelset and the bogie. With the increasing demand for domestically produced train bearings and higher quality requirements, existing bearing technologies suffer from several drawbacks. Firstly, limited space results in insufficient grease capacity and heat dissipation. Secondly, they often have poor sealing performance. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a self-sealing double-row tapered roller bearing with a larger grease injection space and heat dissipation space, and a better sealing effect.

[0004] To achieve the above objectives, this utility model provides a self-sealing double-row tapered roller bearing, comprising an outer ring, an inner ring, a cage, a retaining ring, and a plurality of rollers. The retaining ring includes an upper part, a lower part, and a protrusion. The upper part and the lower part are both axially extended corresponding to the bearing. The upper part is fitted onto the outer ring and snapped in place. The lower part has a clearance fit with the inner ring, and a plurality of sealing rings are provided between the lower part and the inner ring. The sealing rings are arranged at intervals along the inner ring, and the sealing rings respectively form an interference fit with the lower part and the inner ring. The protrusion is located between the upper and lower parts and extends away from the rollers.

[0005] The advantages of the above technical solution are as follows: By setting an upper part, a lower part, and a protrusion on the retaining ring, the upper part forms the positioning between the retaining ring and the bearing. The protrusion, located between the upper and lower parts, extends away from the rollers, creating a larger space between the outer and inner rings. This provides more ample space for grease injection, accommodating more grease, extending the lubrication cycle, reducing maintenance frequency, and also facilitating air circulation, enhancing heat dissipation, effectively reducing heat accumulation caused by friction, and ensuring stable bearing operation. The lower part, with a clearance fit to the inner ring, and several sealing rings spaced along the inner ring, with interference fits between the lower part and the inner ring, form multiple sealing lines, greatly improving the sealing effect. This effectively prevents grease leakage and the intrusion of external dust and impurities, ensuring reliable bearing operation even under harsh conditions, and significantly improving bearing life and performance.

[0006] The present invention can be further configured such that: the lower part is provided with a plurality of arc portions, the inner ring is provided with a plurality of groove portions, the arc portions and the groove portions are provided in a one-to-one correspondence, and the sealing ring is provided between the arc portions and the groove portions.

[0007] By further designing the grooves and arcs to match the sealing rings, the sealing rings can be positioned to ensure the stability of the sealing structure. On the other hand, the positioning of the arcs and grooves can also facilitate the installation of the sealing structure.

[0008] The present invention can be further configured such that: the retainer includes a plurality of oil grooves, the plurality of oil grooves are circumferentially spaced on the retainer, one end of the oil groove is connected to one end of the retainer, and the other end of the oil groove extends to near the other end.

[0009] By further configuring the cage with several oil grooves spaced apart, lubrication can flow to adjacent rollers under centrifugal force during bearing operation, enabling faster lubrication of the rollers. This shortens the grease delivery path, improves lubrication efficiency, and avoids excessive temperature rise of the rollers due to insufficient lubrication during acceleration. Furthermore, the oil grooves reduce the weight of the cage, allowing it to better adapt to high-speed operating environments.

[0010] The present invention can be further configured such that the cross-section of the oil tank is V-shaped.

[0011] 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.

[0012] The present invention can be further configured such that: the retainer includes a weight-reducing groove, the weight-reducing groove is located at one end of the retainer corresponding to the small end of the roller and is arranged in a ring.

[0013] By further designing the cage with an annular weight-reducing groove at one end of the cage corresponding to the small end of the roller, the weight of the cage is effectively reduced, making it better suited to the high-speed operating environment of the bearing.

[0014] 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.

[0015] 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. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is an embodiment of the present utility model. Figure 1 An enlarged view of part a;

[0018] Figure 3 This is an embodiment of the present utility model. Figure 1 Enlarged view of section b;

[0019] Figure 4 This is a schematic diagram of the structure of one end of the cage in an embodiment of the present invention;

[0020] Among them: outer ring 1; inner ring 2; groove 21; cage 3; oil groove 31; weight reduction groove 32; reinforcing rib 33; retaining ring 4; upper part 41; lower part 42; arc part 421; protrusion part 43; roller 5; sealing ring 6. Detailed Implementation

[0021] An embodiment of this utility model of a self-sealing double-row tapered roller bearing is shown below. Figure 1-4As shown: It includes an outer ring 1, an inner ring 2, a cage 3, a retainer ring 4, and several rollers 5. The retainer ring 4 includes an upper part 41, a lower part 42, and a protrusion 43. The upper part 41 and the lower part 42 are both arranged to extend axially corresponding to the bearing. The upper part 41 is sleeved on the outer ring 1 and snapped in place. The lower part 42 has a clearance fit with the inner ring 2, and several sealing rings 6 are provided between the lower part 42 and the inner ring 2. The sealing rings 6 are arranged at intervals along the inner ring 2, and the sealing rings 6 form an interference fit with the lower part 42 and the inner ring 2 respectively. The protrusion 43 is located between the upper part 41 and the lower part 42 and extends away from the rollers 5.

[0022] The lower part 42 is provided with a plurality of arc portions 421, and the inner ring 2 is provided with a plurality of groove portions 21. The arc portions 421 and the groove portions 21 are provided in a one-to-one correspondence, and the sealing ring 6 is provided between the arc portions 421 and the groove portions 21.

[0023] The retainer 3 includes a plurality of oil grooves 31, which are circumferentially spaced on the retainer 3. One end of the oil groove 31 is connected to one end of the retainer 3, and the other end of the oil groove 31 extends to a position close to the other end.

[0024] The oil tank 31 has a V-shaped cross-section.

[0025] The cage 3 includes a weight-reducing groove 32, which is located at one end of the cage corresponding to the small end of the roller and is arranged in a ring shape.

[0026] The weight-reducing groove 32 is provided with a number of reinforcing ribs 33, which are distributed at intervals corresponding to the positions of the oil groove 31.

[0027] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.

Claims

1. A self-sealing double-row tapered roller bearing comprising an outer race, an inner race, a cage, a retainer, and a plurality of rollers, characterized in that: The retaining ring comprises an upper portion, a lower portion and a protruding portion, the upper portion and the lower portion are arranged corresponding to the axial extension of the bearing, the upper portion is sleeved on the outer ring and is clamped and positioned, the lower portion is gap-fitted with the inner ring, a plurality of sealing rings are arranged between the lower portion and the inner ring, the sealing rings are arranged in intervals along the inner ring, and the sealing rings respectively form interference abutment between the lower portion and the inner ring, and the protruding portion is arranged between the upper portion and the lower portion and is arranged extending away from the roller.

2. The self-sealing double row tapered roller bearing of claim 1, wherein: The lower portion is provided with a plurality of arc portions, the inner ring is provided with a plurality of groove portions, the arc portions and the groove portions are arranged one by one, and the sealing rings are arranged between the arc portions and the groove portions.

3. The self-sealing double row tapered roller bearing of claim 1 or 2, wherein: The cage comprises a plurality of oil grooves, the oil grooves are distributed in intervals in the circumferential direction of the cage, one end of the oil groove is communicated with one end of the cage, and the other end of the oil groove extends to the position close to the other end of the cage.

4. The self-sealing double row tapered roller bearing of claim 3, wherein: The cross section of the oil groove is V-shaped.

5. The self-sealing double row tapered roller bearing of claim 3, wherein: The cage comprises a weight-reducing groove, the weight-reducing groove is arranged at one end of the cage corresponding to the small end of the roller and is annularly arranged.

6. The self-sealing double row tapered roller bearing of claim 5, wherein: A plurality of reinforcing convex ribs are arranged in the weight-reducing groove, and the reinforcing convex ribs are arranged in intervals corresponding to the positions of the oil grooves.

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