CN214534038U

CN214534038U - Needle roller bearing

Info

Publication number: CN214534038U
Application number: CN202120676023.XU
Authority: CN
Inventors: 赵建元
Original assignee: Suzhou Tianxinyuan Precision Machinery Co ltd
Current assignee: Suzhou Tianxinyuan Precision Machinery Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-10-29
Anticipated expiration: 2031-04-02

Abstract

The utility model relates to a needle bearing, it includes: the outer ring assembly comprises an outer ring body, a concave ring groove formed in the outer surface of the outer ring body and a containing groove formed in the inner surface of the outer ring body; the rolling needles are in contact with each other pairwise and are arranged in the accommodating groove, and the axial lead of the rolling needles is parallel to the axial lead of the outer ring body; the two outer retainer rings are embedded into two ends of the outer ring body and are in contact with the end faces of the roller pins; the shaft axis of the outer retainer ring is overlapped with the shaft axis of the outer ring body, and the outer surface of the outer retainer ring and the end surface of the outer ring body are positioned in the same plane; the sum of the wall thickness of the outer retainer ring and the depth of the accommodating groove is smaller than the diameter of the roller pin. Thereby improving the service life of the needle bearing.

Description

Needle roller bearing

Technical Field

The utility model belongs to the technical field of the bearing, concretely relates to needle bearing.

Background

The needle roller bearing is a roller bearing with cylindrical rollers. The rollers are both thin and long relative to the diameter of the bearing, and such rollers are called needles. The bearing has high load bearing capacity despite its small cross section, and the needle roller bearing is provided with long and thin rollers, so that it has compact radial structure, and its inner diameter size and load capacity are the same as other bearing types, and its outer diameter is minimum, so that it is specially applicable to bearing structure whose radial installation size is limited. According to different use occasions, a bearing without an inner ring or a roller pin and a retainer assembly can be selected. The existing needle bearing has simple structure and single function and can not meet the increasingly complex production requirement.

Disclosure of Invention

The utility model aims at providing a bearing for solving the shortcoming that exists among the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a needle bearing, comprising:

the outer ring assembly comprises an outer ring body, a concave ring groove formed in the outer surface of the outer ring body and a containing groove formed in the inner surface of the outer ring body;

the rolling needles are in contact with each other pairwise and are arranged in the accommodating groove, and the axial lead of the rolling needles is parallel to the axial lead of the outer ring body;

the two outer retainer rings are embedded into two ends of the outer ring body and are in contact with the end faces of the roller pins; the shaft axis of the outer retainer ring is overlapped with the shaft axis of the outer ring body, and the outer surface of the outer retainer ring and the end surface of the outer ring body are positioned in the same plane; the sum of the wall thickness of the outer retainer ring and the depth of the accommodating groove is smaller than the diameter of the roller pin.

Preferably, the concave ring groove is arranged in the middle of the outer surface of the outer ring body, and the axis of the concave ring groove is overlapped with the axis of the outer ring body.

Furthermore, the width of the concave ring groove is 1/20-1/10 of the width of the outer ring body, and the depth of the concave ring groove is 1/30-1/15 of the thickness of the end face of the outer ring body.

Furthermore, the outer ring body is made of GCr15 steel, and the HRC hardness of the outer ring body is 61-65.

Preferably, the accommodating groove is arranged in the middle of the inner surface of the outer ring body, and the axis of the accommodating groove is overlapped with the axis of the outer ring body.

Optimally, the contact part of the two sides of the accommodating groove and the outer ring body is provided with an inner concave part.

Optimally, the needle roller is made of GCr15 steel, and the HRC hardness of the needle roller is 60-65.

Further, the number of the rolling needles is 20-44.

Preferably, the outer race assembly further includes a plurality of holes disposed at equal intervals in the groove.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses needle bearing cooperates through outer lane subassembly and kingpin, outer retaining ring etc. that adopt specific structure, can play spacing effect to the kingpin on the one hand, and on the other hand can prevent the entering of piece etc to improve needle bearing's life.

Drawings

Fig. 1 is a schematic structural view of the needle roller bearing of the present invention.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings.

The needle roller bearing shown in fig. 1 mainly includes an outer ring assembly 1, a needle roller 2, an outer retainer 3, and the like.

The outer ring assembly 1 includes an outer ring body 11, a concave ring groove 12 formed on an outer surface of the outer ring body 11, and a receiving groove 14 formed on an inner surface of the outer ring body 11. In the present embodiment, the concave ring groove 12 is provided in the middle of the outer surface of the outer ring body 11 with its axis overlapping with the axis of the outer ring body 11; similarly, the receiving groove 14 is disposed in the middle of the inner surface of the outer ring body 11, and the axial line thereof overlaps with the axial line of the outer ring body 11; the difference is that the width of the concave ring groove 12 is preferably 1/20-1/10 of the width of the outer ring body 11, and the depth of the concave ring groove 12 is preferably 1/30-1/15 of the thickness of the end face of the outer ring body 11, so that the outer ring body 11 has enough strength. The outer ring body 11 is made of GCr15 steel and has HRC hardness of 61-65. The contact part of the two sides of the accommodating groove 14 and the outer ring body 11 is provided with an inner concave part, so that the contact area of the needle roller 2 and the accommodating groove 14 is reduced, and the service life is prolonged. The outer ring member 1 further includes a plurality of holes 13 provided at equal intervals in the groove 12, through which additives such as lubricating oil, etc. can be added when these holes 13 are through holes.

The plurality of needle rollers 2 are arranged in the accommodating groove 14 in a contact manner and are arranged in pairs so as to fill the accommodating groove 14, and thus the axial line of each needle roller 2 is parallel to the axial line of the outer race body 11. The needle roller 2 is also made of GCr15 steel, and the HRC hardness of the needle roller is 60-65; the number of the active carbon particles is usually 20-44, and the active carbon particles can be determined according to actual needs and sizes.

The number of the outer retainer rings 3 is two, the outer retainer rings are embedded into two ends of the outer ring body 11 and are in contact with the end faces of the plurality of needle rollers 2, and therefore the outer diameter of each outer retainer ring 3 is slightly larger than the inner diameter of the end face of the outer ring body 11, and the embedding stability is guaranteed. The axial lead of the outer retainer ring 3 is overlapped with the axial lead of the outer ring body 11 and the outer surface thereof is in the same plane with the end surface of the outer ring body 11. It should be noted that the sum of the wall thickness of the outer retainer 3 and the depth of the accommodating groove 14 is smaller than the diameter of the needle roller 2, so that the normal function of the needle roller bearing is ensured.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A needle bearing, comprising:

the outer ring assembly (1), the outer ring assembly (1) comprises an outer ring body (11), a concave ring groove (12) formed in the outer surface of the outer ring body (11), and a containing groove (14) formed in the inner surface of the outer ring body (11);

the roller pins (2) are in contact with each other in pairs and are arranged in the accommodating groove (14), and the axial lead of the roller pins (2) is parallel to the axial lead of the outer ring body (11);

the two outer retainer rings (3) are embedded into two ends of the outer ring body (11) and are in contact with the end faces of the roller pins (2); the axial lead of the outer retainer ring (3) is overlapped with the axial lead of the outer ring body (11), and the outer surface of the outer retainer ring is positioned in the same plane with the end surface of the outer ring body (11); the sum of the wall thickness of the outer retainer ring (3) and the depth of the accommodating groove (14) is smaller than the diameter of the needle roller (2).

2. The needle bearing of claim 1, wherein: the concave ring groove (12) is arranged in the middle of the outer surface of the outer ring body (11), and the axis of the concave ring groove is overlapped with the axis of the outer ring body (11).

3. The needle bearing of claim 2, wherein: the width of the concave ring groove (12) is 1/20-1/10 of the width of the outer ring body (11), and the depth of the concave ring groove (12) is 1/30-1/15 of the end face thickness of the outer ring body (11).

4. The needle roller bearing according to claim 1, 2 or 3, characterized in that: the outer ring body (11) is made of GCr15 steel, and the HRC hardness of the outer ring body is 61-65.

5. The needle bearing of claim 1, wherein: the accommodating groove (14) is arranged in the middle of the inner surface of the outer ring body (11), and the axial line of the accommodating groove is overlapped with the axial line of the outer ring body (11).

6. The needle bearing of claim 1, wherein: the contact part of the two sides of the accommodating groove (14) and the outer ring body (11) is provided with an inner concave part.

7. The needle bearing of claim 1, wherein: the needle roller (2) is made of GCr15 steel, and the HRC hardness of the needle roller is 60-65.

8. The needle roller bearing according to claim 1 or 7, characterized in that: the number of the rolling needles (2) is 20-44.

9. The needle bearing of claim 1, wherein: the outer ring component (1) further comprises a plurality of holes (13) which are arranged in the concave ring groove (12) at equal intervals.