CN212055498U

CN212055498U - Double-row needle roller bearing with uniformly distributed oil hole type retainer

Info

Publication number: CN212055498U
Application number: CN202020631110.9U
Authority: CN
Inventors: 葛丽婧; 王星星; 陈浩
Original assignee: Changzhou Guangyang Bearing Co Ltd
Current assignee: Changzhou Guangyang Bearing Co Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2020-12-01
Anticipated expiration: 2030-04-23

Abstract

The utility model relates to a biserial bearing of equipartition oilhole formula holder, be in including bearing inner race, holder and setting biserial kingpin in the holder, the holder is annular support body, has spacer ring, intermediate ring and spacer ring down along axial equidistance in proper order, go up the spacer ring with have the upper portion space between the intermediate ring along circumference equidistance, go up the spacer ring, intermediate ring and adjacent upper portion space between the spacer ring form the kingpin space of going up, down the spacer ring with have the lower part space between the intermediate ring along circumference equidistance, form down the kingpin space between spacer ring, intermediate ring and the adjacent lower part space between the spacer ring, the upper portion space with the lower part space has the plane sunken to the center pin, the oilhole has been seted up on the intermediate ring, this biserial bearing of equipartition oilhole formula holder, lubricated effectual, the heat-sinking capability is strong, Long service life and simple structure.

Description

Double-row needle roller bearing with uniformly distributed oil hole type retainer

Technical Field

The utility model belongs to the technical field of the bearing technique and specifically relates to double-row bearing of equal cloth oil cellular formula holder.

Background

The double-row needle bearing generally comprises a bearing outer ring, a retainer and needle rollers, has the same inner diameter size and load capacity as other types of bearings, has the smallest outer diameter, is particularly suitable for a supporting structure with limited radial installation size, is an important part applied to an automobile gearbox, and mainly bears radial load and transmits rotating speed during working.

The existing double-row needle roller bearing is difficult to radiate heat in work due to long length of the existing double-row needle roller bearing, the inner parts of the two rows of needle rollers cannot be fully lubricated, an oil hole of an outer ring is aligned with a middle flange of a retainer, lubricating oil circulation is not facilitated, the phenomenon of temperature rise caused by insufficient lubrication can occur in long-time work, the fatigue strength of the bearing is reduced, for example, a lubricating type double row needle roller bearing is disclosed in patent No. CN203421029U, although the retainer is provided with the lubricating oil hole, the oil hole is positioned on the retainer lintel between the adjacent needle rollers, and the oil hole of the bearing outer ring is generally arranged at the middle part, the structure can not form the circulation of a lubricating oil path, the middle part is extremely difficult to be fully lubricated, and if the oil hole is too small, the structure is easy to be blocked by impurities, scratches the surface of the roller pin and cannot play a lubricating role, and if the oil hole is too large, the strength of the retainer can be greatly reduced, so that the service life of the bearing is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at prior art's defect, provide a lubricated effectual, heat-sinking capability is strong, long service life, simple structure's the biserial bearing of equipartition oilhole formula holder.

The utility model discloses a realize through following technical scheme: a double-row needle roller bearing with an oil hole uniformly distributed type retainer comprises a bearing outer ring, the retainer and double-row needle rollers arranged in the retainer, wherein the retainer is an annular frame body and is sequentially provided with an upper spacer ring, a middle ring and a lower spacer ring at equal intervals along the axial direction, upper spacer bars are arranged between the upper spacer ring and the middle ring at equal intervals along the circumferential direction, an upper needle roller space is formed among the upper spacer ring, the middle ring and adjacent upper spacer bars, lower spacer bars are arranged between the lower spacer ring and the middle ring at equal intervals along the circumferential direction, a lower needle roller space is formed among the lower spacer ring, the middle ring and adjacent lower spacer bars, the needle rollers are arranged in the upper needle roller space and the lower needle roller space, and the upper spacer bars and the lower spacer bars are provided with planes which are recessed towards a central shaft.

In order to provide a lubricating oil path in the middle of the bearing and improve the lubricating and heat dissipating effects, the intermediate ring is provided with an oil passing hole.

In order to ensure the stability of the bearing in the rotating process, the oil passing holes are uniformly distributed along the circumferential direction.

Preferably, the number of the oil passing holes is 3, and more or fewer oil passing holes can be designed according to actual conditions.

In order to be matched with the retainer to form a circulating lubrication oil path for providing the middle part of the bearing, an oil groove is formed in the middle of the outer surface of the outer ring of the bearing, and a lubrication oil hole is formed in the oil groove.

Preferably, a lubricating oil hole on the bearing outer ring is axially aligned with the intermediate ring of the retainer, and the lubricating oil hole corresponds to the oil passing hole.

In order to make the structure more reasonable, preferably, the thicknesses of the upper spacing ring, the middle ring and the lower spacing ring are larger than the thicknesses of the upper spacing bar and the lower spacing bar, so that the strength of the retainer can be ensured not to be influenced as much as possible when the oil through hole is formed in the middle ring.

The utility model has the advantages that: this double-row needle bearing of equipartition oilhole formula holder through having seted up the oilhole in the middle part of double-row needle bearing holder, is favorable to the circulation of lubricated oil circuit, has improved heat dispersion simultaneously, has effectively avoided lubricated not enough and the high temperature that smooth circulation of lubricated oil circuit leads to, and then has improved the life of bearing, and this double-row needle bearing of equipartition oilhole formula holder simple structure, processing convenience.

Drawings

FIG. 1 is a schematic structural view of a double-row needle roller bearing of the uniform distribution oilhole type retainer of the present invention;

FIG. 2 is a cross-sectional view of the double-row needle roller bearing of the retainer with uniformly distributed oil holes of the present invention;

FIG. 3 is a schematic structural view of the retainer of the double-row needle roller bearing of the uniformly distributed oil hole type retainer of the present invention;

in the figure: 1. a bearing outer race; 11. an oil sump; 12. a lubricating oil hole; 2. a holder; 21. an upper spacer ring; 22. an intermediate ring; 221. an oil passing hole; 23. a lower spacer ring; 24. an upper spacer bar; 25. a lower spacer bar; 3. and (4) rolling needles.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc. refer to directions of the attached drawings only. Accordingly, the directional terms used are used for describing and understanding the present invention, and are not used for limiting the present invention.

The double-row needle roller bearing with the uniformly distributed oil hole type retainer as shown in figure 1 comprises a bearing outer ring 1, a retainer 2 and double-row needle rollers 3 arranged in the retainer.

As shown in fig. 3, the cage 2 is an annular frame body, and has an upper spacer ring 21, an intermediate ring 22 and a lower spacer ring 23 arranged at equal intervals in the axial direction, upper spacer bars 24 arranged at equal intervals in the circumferential direction between the upper spacer ring 21 and the intermediate ring 22, an upper row of needle roller spaces formed between the upper spacer ring 21, the intermediate ring 22 and adjacent upper spacer bars 24, an upper row of needle rollers 3 arranged in the upper row of needle roller spaces, a lower spacer bar 25 arranged at equal intervals in the circumferential direction between the lower spacer ring 23 and the intermediate ring 22, a lower row of needle roller spaces formed between the lower spacer ring 23, the intermediate ring 22 and adjacent lower spacer bars 25, and a lower row of needle rollers 3 arranged in the lower row of needle roller spaces. The upper and

lower spacer bars

24 and 25 have planes depressed toward the central axis, and the thicknesses of the upper, intermediate and

lower spacer rings

21, 22 and 23 are greater than the thicknesses of the upper and

lower spacer bars

24 and 25.

As shown in fig. 2 and 3, the intermediate ring 22 is provided with 3 oil passing holes 221 uniformly distributed along the circumferential direction.

As shown in fig. 1, an oil groove 11 is formed in the middle of the outer surface of the bearing outer ring 1, a lubricating oil hole 12 corresponding to the oil passing hole 221 in the intermediate ring 22 is formed in the oil groove 11, and the lubricating oil hole 12 and the oil passing hole 221 form a circulating oil path to better lubricate and dissipate heat from the middle of the bearing.

When the double-row needle roller bearing with the oil hole uniformly distributed type retainer works in a gearbox, lubricating oil can enter from the lubricating oil hole 12 and form a good lubricating oil path through the oil passing hole 221, the parts, close to the intermediate ring 22, of the two rows of needle rollers of the bearing are fully lubricated, the heat of the needle rollers is better radiated, and the service life of the bearing is prolonged.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A double-row needle roller bearing with an oil hole uniformly distributed type retainer comprises a bearing outer ring (1), the retainer (2) and double-row needle rollers (3) arranged in the retainer (2), wherein the retainer (2) is an annular frame body and is provided with an upper spacer ring (21), a middle ring (22) and a lower spacer ring (23) at equal intervals in sequence along the axial direction, upper spacer bars (24) are arranged between the upper spacer ring (21) and the middle ring (22) at equal intervals along the circumferential direction, upper row needle roller spaces are formed among the upper spacer ring (21), the middle ring (22) and the adjacent upper spacer bars (24), lower row needle roller spaces (25) are arranged between the lower spacer ring (23) and the middle ring (22) at equal intervals along the circumferential direction, lower row needle roller spaces are formed among the lower spacer ring (23), the middle ring (22) and the adjacent lower row needle roller spaces (25), and the needle rollers (3) are arranged in the upper row needle roller spaces and the lower row needle roller spaces, -said upper spacer bar (24) and said lower spacer bar (25) having planes which are concave towards the central axis, characterized in that: the middle ring (22) is provided with an oil passing hole (221).

2. The double-row needle roller bearing with the oil-hole-uniformly distributed cages as claimed in claim 1, wherein: the oil passing holes (221) are uniformly distributed along the circumferential direction.

3. The double-row needle roller bearing with the oil-hole-uniformly distributed cages as claimed in claim 1, wherein: the number of the oil passing holes (221) is 3.

4. The double-row needle roller bearing with the oil-hole-uniformly distributed cages as claimed in claim 1, wherein: an oil groove (11) is formed in the middle of the outer surface of the bearing outer ring (1), and a lubricating oil hole (12) is formed in the oil groove (11).

5. The double-row needle roller bearing with the oil-hole-uniformly distributed cages as claimed in claim 4, wherein: the lubrication oil hole (12) is axially aligned with the intermediate ring (22).

6. The double-row needle roller bearing with the oil-hole uniformly distributed cages as claimed in claim 5, wherein: the lubricating oil hole (12) corresponds to the oil passing hole (221).

7. The double-row needle roller bearing with the oil-hole-uniformly distributed cages as claimed in claim 1, wherein: the thicknesses of the upper spacer ring (21), the middle ring (22) and the lower spacer ring (23) are greater than the thicknesses of the upper spacer bar (24) and the lower spacer bar (25).