CN210034162U

CN210034162U - Needle roller bearing

Info

Publication number: CN210034162U
Application number: CN201920619496.9U
Authority: CN
Inventors: 葛波达; 余祥忠
Original assignee: Ningbo Zhenhai Engel Bearing Co Ltd
Current assignee: Ningbo Zhenhai Engel Bearing Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-02-07
Anticipated expiration: 2029-04-30

Abstract

The utility model relates to the technical field of bearings, and discloses a needle bearing, which comprises an outer ring, wherein a retainer is fixedly connected to the inner side of the outer ring, and an inner ring is arranged on the inner side of the retainer in a sliding manner; the retainer is of an annular structure, a plurality of needle grooves are formed in the periphery of the retainer, needle rollers are sleeved in the needle grooves and matched with the needle grooves, through holes are formed in two ends of the needle grooves and are respectively communicated with the needle grooves, a plurality of grooves are formed in two sides of each needle groove, and the grooves in one side face of each needle groove and the grooves in the other side face of each needle groove are arranged in a staggered mode; a first spiral groove is formed in the outer wall of the inner ring, a second spiral groove is formed in the inner wall of the outer ring, and the first spiral groove and the second spiral groove are arranged around the inner ring and the outer ring respectively; the device has better heat dissipation and lubrication effects, can effectively reduce the frictional resistance and frictional heat of the retainer, and reduces the abrasion of the retainer and the roller pin.

Description

Needle roller bearing

Technical Field

The utility model relates to a bearing technical field, concretely relates to needle bearing.

Background

Needle bearings are a common part in the industry in mechanical transmissions, and are compact and have a high load bearing capacity. However, the existing needle roller bearing is susceptible to foreign impurities in the working process, such as water, dust, iron filings and the like, which can accelerate the abrasion and corrosion of the bearing, reduce the service life of the bearing, and can not meet the use requirements.

The existing needle bearing mainly comprises an outer ring, a retainer and a needle roller, wherein the retainer is a part for guiding the needle roller. The existing retainer has the disadvantages of large frictional resistance, poor lubricating effect and poor heat dissipation effect, is easy to cause abrasion of the roller pin and the retainer body, and cannot meet the use requirement.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a needle bearing, the device have better heat dissipation and lubricated effect, can effectively reduce the frictional resistance and the frictional heat of holder, reduce the wearing and tearing of holder and kingpin.

In order to achieve the above object, the present invention provides the following technical solutions:

a needle bearing comprises an outer ring, wherein a retainer is fixedly connected to the inner side of the outer ring, and an inner ring is arranged on the inner side of the retainer in a sliding manner;

the retainer is of an annular structure, a plurality of needle grooves are formed in the periphery of the retainer, needle rollers are sleeved in the needle grooves and matched with the needle grooves, through holes are formed in two ends of the needle grooves and communicated with the needle grooves respectively, a plurality of grooves are formed in two sides of the needle grooves, and the grooves in one side surface of the needle grooves and the grooves in the other side surface of the needle grooves are arranged in a staggered mode;

the outer wall of the inner ring is provided with a first spiral groove, the inner wall of the outer ring is provided with a second spiral groove, and the first spiral groove and the second spiral groove are arranged around the inner ring and the outer ring respectively.

The utility model discloses in, it is preferred, the both ends of outer lane are provided with first trapezoidal protruding, the both ends of inner circle are provided with the trapezoidal protruding of second, the centre gripping is provided with the holder between the trapezoidal protruding of first trapezoidal and second, the holder with first trapezoidal protruding fixed connection, the holder with the trapezoidal protruding slip setting of second.

The utility model discloses in, it is preferred, the holder both ends are provided with seal assembly, seal assembly is used for right the through-hole seals.

The utility model discloses in, it is preferred, evenly distributed has the cylinder to protruding on the seal assembly, the cylinder protruding with the through-hole phase-match.

In the present invention, it is preferable that the plurality of needle grooves are arranged uniformly in the circumferential direction of the holder.

The utility model discloses in, it is preferred, the recess with the contact department of kingpin is provided with the fillet.

The utility model discloses in, it is preferred, be provided with the wearing layer on the outer wall of kingpin.

In the present invention, preferably, the wear-resistant layer is a ceramic layer.

The utility model discloses in, preferred, all be provided with corrosion-resistant layer on the inner wall of outer lane and the outer wall of inner circle.

In the present invention, preferably, the groove depths of the first spiral groove and the second spiral groove are 0.3 to 0.6 times the thickness of the inner ring and the outer ring, respectively.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model can well prevent external impurities from entering the interior of the needle bearing, effectively reduce the friction in the interior of the bearing, reduce the abrasion and corrosion of the bearing, prolong the service life of the bearing and effectively prevent the axial movement of the retainer; the heat dissipation effect and the lubrication effect are good, the friction resistance and the friction heat of the retainer can be effectively reduced, and the abrasion of the retainer and the roller pin is reduced; the overall design is compact and the weight is light.

Drawings

Fig. 1 is a schematic structural view of a needle bearing.

Fig. 2 is an exploded view of a needle bearing.

Fig. 3 is a front view of a needle bearing.

Fig. 4 is a sectional view in the direction a of fig. 3.

Fig. 5 is a schematic structural view of a cage of a needle bearing.

Fig. 6 is a schematic structural view of an outer race, a first trapezoidal protrusion, and a second spiral groove of a needle bearing.

Fig. 7 is a front view of fig. 6.

Fig. 8 is a sectional view in the direction B of fig. 7.

Fig. 9 is a schematic structural view of an inner race, second trapezoidal protrusions, and first spiral grooves of a needle bearing.

Fig. 10 is a top view of fig. 9.

Fig. 11 is a sectional view in the direction a of fig. 10.

Fig. 12 is a schematic structural view of a needle roller bearing according to embodiment 2.

Fig. 13 is a side view of a needle roller bearing according to embodiment 2.

In the drawings: 1. an outer ring; 2. an inner ring; 3. a holder; 4. a seal assembly; 5. a cylindrical protrusion; 6. a first trapezoidal protrusion; 7. a second trapezoidal protrusion; 8. a needle rolling groove; 9. a through hole; 10. a partition plate; 11. a groove; 12. a first spiral groove; 13. a second spiral groove; 14. and (4) rolling needles.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1:

referring to fig. 1 to 11, the present invention discloses a needle roller bearing, which includes an outer ring 1, a retainer 3 fixedly connected to an inner side of the outer ring 1, and an inner ring 2 slidably disposed on an inner side of the retainer 3;

the retainer 3 is of an annular structure, a plurality of needle grooves 8 are circumferentially arranged on the retainer 3, needle rollers 14 are sleeved in the needle grooves 8, the needle rollers 14 are matched with the needle grooves 8, through holes 9 are arranged at two ends of each needle groove 8, the through holes 9 can reduce the contact area between the two ends of each needle groove 8 and the end parts of the needle rollers 14, reduce the abrasion of the end parts of the needle rollers 14, facilitate heat dissipation and reduce the overall weight of the retainer 3, the two through holes 9 are respectively communicated with the needle grooves 8, a plurality of grooves 11 are arranged at two sides of each needle groove 8, on one hand, the contact area between the needle rollers 14 and the partition plate 10 can be reduced, frictional heat can be reduced, the heat dissipation effect can be improved, the abrasion of the needle rollers 14 can be reduced, on the other hand, oil storage can be facilitated, the lubricating effect during rolling of the needle rollers 14 can be improved, and the overall weight of the retainer 3 can, the grooves 11 on one side surface of the needle groove 8 and the grooves 11 on the other side surface of the needle groove 8 are arranged in a staggered manner, so that the abrasion of the needle rollers 14 can be better reduced;

the outer wall of the inner ring 2 is provided with a first spiral groove 12, the inner wall of the outer ring 1 is provided with a second spiral groove 13, the first spiral groove 12 and the second spiral groove 13 are respectively arranged around the inner ring 2 and the outer ring 1, the first spiral groove 12 and the second spiral groove 13 are designed to facilitate storage of lubricating oil, the lubricating effect of the partition plate 10 and the roller pin 14 is improved, and the overall weight of the inner ring 2 and the outer ring 1 can be reduced.

In the present embodiment, the outer ring 1 is provided with first trapezoidal protrusions 6 at both ends, for convenience of installation, one of the first trapezoidal protrusions 6 is integrally formed, the other first trapezoidal protrusion 6 is welded, and the inner ring 2 is provided with second trapezoidal protrusions 7 at both ends, and for convenience of installation, one of the second trapezoidal protrusions 7 is integrally formed, the other second trapezoidal protrusion 7 is welded, the retainer 3 is clamped between the first trapezoidal protrusion 6 and the second trapezoidal protrusion 7, the retainer 3 is fixedly connected to the first trapezoidal protrusion 6, and the retainer 3 is slidably provided to the second trapezoidal protrusion 7.

In the embodiment, the plurality of needle grooves 8 are uniformly arranged along the circumferential direction of the retainer 3, so that the bearing is more stable in operation, and the stress uniformity of the bearing is improved.

In the present embodiment, the contact portion between the needle roller 14 and the groove 11 is provided with a rounded corner, so that frictional heat is reduced, and loss between components is reduced.

In the embodiment, the outer wall of the needle roller 14 is provided with a wear-resistant layer, so that the service life is prolonged.

In this embodiment, the wear resistant layer is a ceramic layer.

In the embodiment, the inner wall of the outer ring 1 and the outer wall of the inner ring 2 are both provided with corrosion-resistant layers, so that the service life of the bearing is prolonged, and the application range of the bearing is wider.

In this embodiment, the groove depth of the first spiral groove 12 and the second spiral groove 13 is 0.3 to 0.6 times the thickness of the inner ring 2 and the outer ring 1, respectively, so that the inner ring 2 and the outer ring 1 have certain strength, the contact area of the inner ring 2, the outer ring 1 and the needle roller 14 can be effectively reduced, and better lubrication and heat dissipation effects can be achieved.

Example 2: referring to fig. 1 to 13, the present embodiment provides another needle bearing, which is different from embodiment 1 in that:

and sealing components 4 are arranged at two ends of the retainer 3, the sealing components 4 are used for sealing the through holes 9, and the sealing components 4 are made of elastic rubber.

The sealing assembly 4 is uniformly distributed with cylindrical protrusions 5, the cylindrical protrusions 5 are matched with the through holes 9, when lubricating oil needs to be added to the bearing, the sealing assembly 4 is taken down, and after the lubricating oil is added, the sealing assembly 4 is installed to prevent impurities from entering the bearing.

The working principle is as follows: when the installation is carried out, firstly, the side of the second trapezoidal protrusion 7 which is integrally formed is placed on the same side as the side of the first trapezoidal protrusion 6 which is integrally formed and is coaxially arranged, and at the moment, the outer ring 1 and the inner ring 2 form a gap together;

then, the needle rollers 14 are sequentially clamped in the needle roller grooves 8, the retainer 3 with the needle rollers 14 clamped is placed in a gap formed by the outer ring 1 and the inner ring 2 together, the first trapezoidal protrusions 6 are welded with one end of the outer ring 1, the second trapezoidal protrusions 7 are welded with one end of the inner ring 2, and finally the retainer 3 is welded with the two first trapezoidal protrusions 6.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims

1. The needle roller bearing comprises an outer ring (1), and is characterized in that a retainer (3) is fixedly connected to the inner side of the outer ring (1), and an inner ring (2) is arranged on the inner side of the retainer (3) in a sliding manner;

the retainer (3) is of an annular structure, a plurality of needle grooves (8) are formed in the periphery of the retainer (3), needle rollers (14) are sleeved in the needle grooves (8), the needle rollers (14) are matched with the needle grooves (8), through holes (9) are formed in two ends of each needle groove (8), the two through holes (9) are respectively communicated with the needle grooves (8), a plurality of grooves (11) are formed in two sides of each needle groove (8), and the grooves (11) in one side surface of each needle groove (8) and the grooves (11) in the other side surface of each needle groove (8) are arranged in a staggered mode;

the outer wall of the inner ring (2) is provided with a first spiral groove (12), the inner wall of the outer ring (1) is provided with a second spiral groove (13), and the first spiral groove (12) and the second spiral groove (13) are arranged around the inner ring (2) and the outer ring (1) respectively.

2. Needle roller bearing according to claim 1, characterized in that the outer ring (1) is provided with first trapezoidal protrusions (6) at both ends thereof, the inner ring (2) is provided with second trapezoidal protrusions (7) at both ends thereof, the cage (3) is clamped between the first trapezoidal protrusions (6) and the second trapezoidal protrusions (7), the cage (3) is fixedly connected with the first trapezoidal protrusions (6), and the cage (3) is slidably arranged with the second trapezoidal protrusions (7).

3. Needle bearing in accordance with claim 2, characterized in that the cage (3) is provided with sealing assemblies (4) at both ends, the sealing assemblies (4) being used for sealing the through-hole (9).

4. Needle bearing in accordance with claim 3, characterized in that the sealing assembly (4) has cylindrical protrusions (5) distributed uniformly thereon, the cylindrical protrusions (5) matching the through holes (9).

5. Needle bearing in accordance with claim 1, characterized in that a plurality of the needle grooves (8) are arranged uniformly in the circumferential direction of the cage (3).

6. Needle bearing in accordance with claim 1, characterized in that the contact of the groove (11) with the needle (14) is provided with rounded corners.

7. Needle roller bearing in accordance with claim 1, characterized in that the outer wall of the needle roller (14) is provided with a wear layer.

8. The needle roller bearing of claim 7, wherein the wear resistant layer is a ceramic layer.

9. Needle bearing according to claim 1, characterized in that the inner wall of the outer ring (1) and the outer wall of the inner ring (2) are provided with a corrosion resistant layer.

10. Needle bearing in accordance with claim 1, characterized in that the groove depth of the first helical groove (12) and the second helical groove (13) is 0.3-0.6 times the thickness of the inner ring (2) and the outer ring (1), respectively.