CN219452693U

CN219452693U - Maintenance-free roller bearing

Info

Publication number: CN219452693U
Application number: CN202320367383.0U
Authority: CN
Inventors: 杨坡; 李伟功; 吕广辉; 时智峰
Original assignee: LUOYANG BEST PRECISION MACHINERY MANUFACTURE CO Ltd
Current assignee: LUOYANG BEST PRECISION MACHINERY MANUFACTURE CO Ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-08-01
Anticipated expiration: 2033-03-02

Abstract

The utility model discloses a maintenance-free roller bearing, which comprises an outer ring, an inner ring, rollers arranged between the outer ring and the inner ring and a retainer for uniformly separating the rollers. The retainer is a graphite retainer, and two bearings are provided with double-layer sealing structures between the outer ring and the inner ring. The double-layer sealing structure comprises a dust cover and a blocking cover, wherein the dust cover is fixedly arranged at the inner diameter of the outer ring, a tiny gap is formed between the dust cover and the outer diameter of the inner ring, the blocking cover is fixedly arranged at the outer diameter of the inner ring, and a tiny gap is formed between the blocking cover and the inner diameter of the outer ring. The clamping grooves are formed in the two sides of the outer ring along the circumferential direction at the inner diameter, the dust cover is fixedly arranged in the clamping grooves, an extending part extending along the axial direction is arranged at the part, close to the outer diameter of the inner ring, of the dust cover, and a tiny gap is formed between the extending part and the outer diameter of the inner ring. The baffle cover is fixedly connected with the outer diameter of the inner ring through interference fit. The utility model can solve the technical problems that the existing roller bearing needs frequent lubrication, overhauling and maintenance and is easy to fail.

Description

Maintenance-free roller bearing

Technical Field

The utility model relates to the technical field of roller bearings, in particular to a maintenance-free roller bearing.

Background

The drying room conveying system of the automobile coating line is an important component part of an automobile production and manufacturing link, and in the coating production and manufacturing process, the mechanized conveying equipment is a produced artery and penetrates through the whole coating production process. In each process step of coating production, the drying room conveying equipment is required to perform program actions, workpiece lifting, process distance control and the like according to process requirements, and the stability of the drying room conveying equipment is very important.

The high-temperature roller bed and the high-temperature lifter are used as important components of a drying room conveying system, and the performance requirements on all parts are particularly strict. The roller bearing is used as a component in a drying room conveying system, the working environment temperature of the roller bearing is about 220 ℃, and the roller bearing is required to bear larger radial load and axial load, so that the working environment is bad.

The current domestic situation is that the roller bearing adopts a common deep groove ball bearing, and the outer ring of the deep groove ball bearing is inlaid in the ferrule to jointly form the roller. The non-contact seal is arranged on one side of the deep groove ball bearing, and the special working condition of the drying room is adapted by adopting an oil drip lubrication mode. The roller has the following problems in the use process:

1. the roller bearing is lubricated by manual oil brushing or oil dripping, so that the structure of the roller bearing cannot be effectively sealed to prevent dust, particles and other impurities in the environment from entering the bearing, and the roller bearing is extremely easy to lose efficacy due to abrasion;

2. the roller bearing is insufficiently lubricated by manual oil brushing lubrication or oil dripping lubrication, and runs in a high-temperature environment for a long time, the hardness, wear resistance, contact fatigue strength, oxidation resistance and dimensional stability of common bearing materials are obviously reduced, and the service life of the roller bearing is greatly lower than the theoretical service life due to the defect of insufficient lubrication;

3. the man-hour that manual brushing oil lubrication or oil drip lubrication needs is long to because drying room operational environment is abominable, lead to the human cost high.

For the above reasons, the automobile manufacturers need to lubricate, overhaul and maintain the roller bearings frequently, which takes up a significant amount of production time. Roller bearings are prone to failure due to wear, and the probability of sudden shutdown is increased. Meanwhile, the working strength of the overhauling personnel is high.

Disclosure of Invention

The utility model aims to provide a maintenance-free roller bearing, which can solve the technical problems that the existing roller bearing needs frequent lubrication, overhauling and maintenance and is easy to fail.

In order to achieve the above purpose, the present utility model adopts the following technical scheme.

A maintenance-free roller bearing comprises an outer ring, an inner ring, rollers arranged between the outer ring and the inner ring and a retainer for uniformly separating the rollers. The retainer is a graphite retainer, and a double-layer sealing structure for preventing dust, particles and other impurities from entering the bearing is arranged between the outer ring and the inner ring of the bearing.

Further, the double-layer sealing structure comprises a dust cover and a blocking cover arranged on one side, far away from the roller, of the dust cover, the dust cover is fixedly arranged at the inner diameter of the outer ring, a tiny gap is formed between the dust cover and the outer diameter of the inner ring, the blocking cover is fixedly arranged at the outer diameter of the inner ring, and a tiny gap is formed between the blocking cover and the inner diameter of the outer ring.

Further, clamping grooves are formed in the inner diameter of the two sides of the outer ring along the circumferential direction, the dust cover is fixedly arranged in the clamping grooves, an extending part extending along the axial direction is arranged at the part, close to the outer diameter of the inner ring, of the dust cover, and a tiny gap is formed between the extending part and the outer diameter of the inner ring.

Further, the baffle cover is fixedly connected with the outer diameter of the inner ring through interference fit.

Further, the dustproof cover and the baffle cover are made of corrosion-resistant stainless steel.

Further, the outer ring and the inner ring are both made of heat resistant bearing steel.

Further, the outer ring is of a thick-wall structure, and the outer diameter of the outer ring is in a spherical shape.

Further, the rollers are ceramic rollers.

After the technical scheme is adopted, the utility model has the following beneficial effects:

1. according to the utility model, the graphite retainer and the double-layer sealing structure are adopted, and the characteristics of excellent self-lubrication, high temperature resistance, corrosion resistance, light weight and high strength of the graphite material are utilized, and the dust cover and the baffle cover are arranged alternately in the double-layer sealing structure to generate good sealing performance, so that the self-lubrication of the roller bearing in the technical scheme can be realized, and the sealing performance is good, dust, particles and other impurities in the environment can be effectively prevented from entering the bearing, and the maintenance-free roller bearing is realized;

2. the outer ring and the inner ring of the utility model adopt high-quality heat-resistant bearing steel, have high hardness and fatigue life at high temperature through heat treatment process and anti-corrosion treatment, and can continuously run for a long time in high-temperature environment; the double-layer sealing structure is made of corrosion-resistant stainless steel, is more suitable for being used under the working conditions of acid-base solution and acid-base atmosphere, and prolongs the service life of the roller bearing by times;

3. the roller body is made of special ceramic materials, has the advantages of excellent chemical corrosion resistance, wear resistance, high temperature resistance, high mechanical strength, good self-lubricating performance, high-temperature creep resistance, small friction coefficient, high heat conductivity coefficient, low thermal expansion coefficient, lubrication-free property, long service life and the like, and further prolongs the service life of the roller bearing;

4. the outer ring is of a thick-wall structure, can be directly in contact with the track, has a spherical outer diameter, can be well in contact with the contour shape of the track, and ensures reasonable bearing stress.

Drawings

Fig. 1 is a schematic view of the overall structure of a prior art roller bearing and roller form.

Fig. 2 is a schematic view of the overall structure of the roller bearing of the present utility model.

Fig. 3 is a schematic cross-sectional view of the outer ring according to the present utility model.

Fig. 4 is an enlarged schematic view at a in fig. 2.

Fig. 5 is a schematic cross-sectional view of the inner ring of the present utility model.

Fig. 6 is a schematic view of direction B in fig. 5.

Fig. 7 is a schematic cross-sectional view of a cage according to the present utility model.

Fig. 8 is a schematic view of direction C in fig. 7.

Description of the drawings: 1. the outer ring, 11, clamping grooves, 12, an outer rolling way, 2, an inner ring, 21, an inner rolling way, 3, rollers, 4, a retainer, 41, a pocket hole, 5, a double-layer sealing structure, 51, a dust cover, 511, an extension part, 52, a blocking cover, 61, a deep groove ball bearing, 62 and a ferrule.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the features and performances of a maintenance-free roller bearing according to the present utility model will be described in further detail with reference to the accompanying drawings and examples.

Example 1

Referring to fig. 1 to 8, a maintenance-free roller bearing includes an outer ring 1, an inner ring 2, rollers 3 provided between the outer ring 1 and the inner ring 2, and a cage 4 for uniformly separating the rollers 3. The retainer 4 is a graphite retainer, and a double-layer sealing structure 5 for preventing dust, particles and other impurities from entering the bearing is arranged between the outer ring 1 and the inner ring 2 of the bearing.

Further, the double-layer sealing structure 5 comprises a dust cover 51 and a blocking cover 52 arranged on one side of the dust cover 51 away from the roller 3, wherein the dust cover 51 is fixedly arranged at the inner diameter of the outer ring 1, a tiny gap is formed between the dust cover 51 and the outer diameter of the inner ring 2, the blocking cover 52 is fixedly arranged at the outer diameter of the inner ring 2, and a tiny gap is formed between the blocking cover 52 and the inner diameter of the outer ring 1.

Further, both sides of the outer ring 1 are provided with a clamping groove 11 along the circumferential direction at the inner diameter, the dust cover 51 is fixedly arranged in the clamping groove 11, the part of the dust cover 51 close to the outer diameter of the inner ring 2 is provided with an extending part 511 extending along the axial direction, and a tiny gap is formed between the extending part 511 and the outer diameter of the inner ring 2.

Further, the blocking cover 52 is fixedly connected with the outer diameter of the inner ring 2 through interference fit.

Further, the dust cap 51 and the blocking cap 52 are made of corrosion-resistant stainless steel.

Further, the outer ring 1 and the inner ring 2 are both made of heat-resistant bearing steel.

Further, the outer ring 1 has a thick-wall structure, and the outer diameter of the outer ring 1 is spherical.

Further, the roller 3 is a ceramic roller.

When the roller bearing is assembled, the outer ring 1 and the inner ring 2 are coaxially assembled, an outer raceway 12 is arranged at the inner diameter of the outer ring 1, an inner raceway 21 is arranged at the outer diameter of the inner ring 2, a plurality of rollers 3 are assembled between the outer raceway 12 and the inner raceway 21, and the retainer 4 is installed, so that one roller 3 is arranged in each pocket 41 on the retainer 4.

Both sides of the outer ring 1 are also provided with clamping grooves 11 along the circumferential direction at the inner diameter, the dust cover 51 is arranged in the clamping grooves 11 and fixedly connected with the outer ring 1, and the extension 511 of the dust cover 51 forms a tiny gap with the outer diameter of the inner ring 2. The baffle cover 52 is fixedly connected to the outer diameter of the inner ring 2 through interference fit, the baffle cover 52 is arranged on one side of the dust cover 51 far away from the roller 3, and a tiny gap is formed between the baffle cover 52 and the inner diameter of the outer ring 1. The dust cover 51 and the blocking cover 52 together constitute a double-layer sealing structure 5.

In the concrete implementation, the roller bearing is fixedly arranged at a required position through the matching of the inner ring 2 shaft. Because the outer ring 1 is of a thick-wall structure, the outer ring can be directly used in contact with a track, and the outer ring of the deep groove ball bearing 61 is not required to be sleeved with a ferrule 62 for use as in the prior art, so that the number of parts is reduced, and the overall stability is enhanced. And the outer diameter of the outer ring 1 is in a spherical shape, so that the outer ring 1 can ensure reasonable stress of the roller bearing when being contacted with the track, and the extra abrasion of the roller bearing caused by uneven stress is reduced.

The retainer 4 of the roller bearing is made of graphite, and the roller bearing is ensured to be free of maintenance due to the fact that the graphite has good self-lubricating property, high-temperature resistance, chemical stability and corrosion resistance and is matched with the good sealing property of the double-layer sealing structure 5.

The outer ring 1 and the inner ring 2 of the roller bearing are made of heat-resistant bearing steel, and are subjected to heat treatment and corrosion prevention treatment. The roller 3 adopts a ceramic roller and has the characteristics of small thermal expansion coefficient, high hardness, corrosion resistance, abrasion resistance, strong high-temperature stability, strong thermal shock resistance and strong fracture toughness. The dust cover 51 and the shield cover 52 are made of corrosion-resistant stainless steel. The roller bearing has an ultra-long service life under the working conditions of high temperature, acid-containing alkali solution and acid-base atmosphere in the oven, and meets the special performance requirements of a coating line drying room conveying system on the roller bearing.

Example two

Unlike the first embodiment, the locking groove 11 is provided at the outer diameter of the inner ring 2, the dust cap 51 is fixedly connected to the inner ring 2 in the locking groove 11, and the extension 511 of the dust cap 51 forms a minute gap with the inner diameter of the outer ring 1. The retaining cover 52 is fixedly connected to the inner diameter of the outer ring 1 through interference fit, the retaining cover 52 is arranged on one side, far away from the roller 3, of the dust cover 51, and a tiny gap is formed between the retaining cover 52 and the outer diameter of the inner ring 2. The dust cover 51 and the blocking cover 52 together constitute a double-layer sealing structure 5.

It should be noted that, in the present embodiment, the parts not described in detail are all prior art, and the above embodiments are only for illustrating the present utility model, but the present utility model is not limited to the above embodiments, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model falls within the protection scope of the present utility model.

Claims

1. The utility model provides a maintenance-free roller bearing, includes outer lane (1), inner circle (2), establishes roller (3) between outer lane (1) and inner circle (2) and is used for evenly spaced apart holder (4) with roller (3), its characterized in that:

the retainer (4) is a graphite retainer;

and a double-layer sealing structure (5) for preventing dust, particles and other impurities from entering the bearing is arranged between the outer ring (1) and the inner ring (2) of the bearing.

2. A maintenance-free roller bearing according to claim 1, wherein: the double-layer sealing structure (5) comprises a dust cover (51) and a blocking cover (52) arranged on one side, far away from the roller (3), of the dust cover (51), the dust cover (51) is fixedly arranged at the inner diameter of the outer ring (1), a tiny gap is formed between the dust cover (51) and the outer diameter of the inner ring (2), the blocking cover (52) is fixedly arranged at the outer diameter of the inner ring (2), and a tiny gap is formed between the blocking cover (52) and the inner diameter of the outer ring (1).

3. A maintenance-free roller bearing according to claim 2, wherein: both sides of the outer ring (1) are provided with clamping grooves (11) along the circumferential direction at the inner diameter, the dust cover (51) is fixedly arranged in the clamping grooves (11), the part, close to the outer diameter of the inner ring (2), of the dust cover (51) is provided with an extension part (511) extending along the axial direction, and a tiny gap is formed between the extension part (511) and the outer diameter of the inner ring (2).

4. A maintenance-free roller bearing according to claim 3, wherein: the baffle cover (52) is fixedly connected with the outer diameter of the inner ring (2) through interference fit.

5. A maintenance-free roller bearing according to claim 4, wherein: the dustproof cover (51) and the baffle cover (52) are made of corrosion-resistant stainless steel.

6. A maintenance-free roller bearing according to claim 5, wherein: the outer ring (1) and the inner ring (2) are both made of heat-resistant bearing steel.

7. A maintenance-free roller bearing according to claim 6, wherein: the outer ring (1) is of a thick-wall structure, and the outer diameter of the outer ring (1) is in a spherical shape.

8. A maintenance-free roller bearing according to any one of claims 1 to 7, wherein: the roller (3) is a ceramic roller.