Embedded solid full-complement pointed needle bearing

Abstract

The utility model relates to an embedded solid full-complement pointed needle bearing which comprises an outer ring, flanges are arranged on the two sides of a cavity of the outer ring respectively, needle rollers located between the flanges are sequentially arranged in the circumferential direction of the cavity of the outer ring, each needle roller is provided with a cylindrical part, and the two ends of each cylindrical part are provided with pointed head parts respectively. A retainer ring is embedded in the flange inner ring, the retainer ring comprises a supporting part, a connecting part and a limiting part, the supporting part extends into the cavity of the outer ring along the axial direction of the retainer ring, the roller pin is positioned between the inner wall of the cavity of the outer ring and the supporting part, the connecting part is clamped with the peripheral wall of the flange inner ring, and the limiting part is attached to the outer wall surface of the flange. The needle rollers are arranged between the flanges on the two sides of the cavity of the outer ring, the retainer ring is embedded in the inner rings of the flanges, and the needle rollers are arranged between the inner wall of the cavity of the outer ring and the supporting part of the retainer ring, so that the supporting part can effectively prevent the needle rollers from falling off in the processes of storing, transporting and installing the needle roller bearing, and normal use of the needle roller bearing is ensured.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and in particular to an embedded solid full complement needle roller bearing. Background Technology

[0002] Needle roller bearings are roller bearings with cylindrical rollers, and are particularly suitable for support structures where radial installation dimensions are limited. Fully loaded needle roller bearings, on the other hand, are needle roller bearings where needle rollers directly fill the entire outer ring raceway, and are mainly suitable for applications with lower speeds but higher load capacities.

[0003] The cylindrical rollers used in needle roller bearings are commonly cylindrical in structure and are mounted in the raceway by a cage. Full needle bearings, on the other hand, are needle roller bearings without a cage structure. The needles are arranged sequentially and fill the entire raceway. During use, the outer circumferential surface of the journal that mates with the bearing serves as the rolling surface of the needles. Therefore, before use, it is necessary to prevent the needles from falling out of the raceway to ensure that the needle roller bearing remains intact during storage and transportation. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides an embedded solid full complement needle roller bearing that can prevent needle rollers from falling off.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an embedded solid full complement pointed needle roller bearing, including an outer ring, the outer ring having flanges on both sides of its cavity, and needle rollers arranged sequentially between the flanges along the circumference of the outer ring cavity, each needle roller having a cylindrical portion with pointed heads at both ends; a retaining ring is embedded in the inner ring of the flanges, the retaining ring including an integral support portion, a connecting portion, and a limiting portion, the connecting portion being located between the support portion and the limiting portion, the support portion extending axially into the outer ring cavity along the retaining ring, the needle rollers being located between the inner wall of the outer ring cavity and the support portion, the connecting portion engaging with the circumferential wall of the inner ring of the flanges, and the limiting portion conforming to the outer wall surface of the flanges.

[0006] Specifically, the connecting part has an annular protrusion formed by rolling, and an annular groove is provided on the inner ring of the retaining edge. The annular protrusion is inserted into the annular groove to realize the snap-fit ​​between the retaining ring and the outer ring retaining edge.

[0007] Furthermore, the limiting part has a folded edge, and the inner side of the folded edge is attached to the outer wall of the retaining edge. Thus, when installing the retaining ring, the retaining ring can be limited by the folded edge being attached to the retaining edge.

[0008] The outer wall of the retaining ring has a first protrusion formed by an inner blind hole on the inner wall of the retaining ring; the outer wall of the retaining ring also has a second protrusion formed by an outer blind hole on the inner wall of the retaining ring. This increases the friction between the retaining ring and the outer ring, making the fit more secure and preventing the retaining ring from easily falling off.

[0009] Specifically, the inner blind hole is located inside the annular protrusion, and the outer blind hole is located outside the annular protrusion. The inner blind hole is an oblong hole, and the outer blind hole is a round hole.

[0010] Furthermore, the inner cavities of the outer ring each have annular grooves at both ends, and the annular grooves serve as a process structure to facilitate the complete machining of the inner surface of the outer ring.

[0011] To ensure bearing lubrication during use, the outer ring has an annular groove in the middle of its outer circumferential surface, and oil injection holes are evenly distributed around the bottom of the annular groove.

[0012] The beneficial effects of this utility model are as follows: This utility model sets the needle rollers between the retaining edges on both sides of the outer ring cavity. By embedding a retaining ring inside the inner ring of the retaining edge, the needle rollers are arranged between the inner wall of the outer ring cavity and the support part of the retaining ring. In this way, during the storage, transportation and installation of the needle roller bearing, the support part can effectively prevent the needle rollers from falling off, ensuring the normal use of the needle roller bearing. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0016] Figure 3 yes Figure 2 A magnified structural diagram of point A in the middle.

[0017] Figure 4 This is a partial structural diagram of the outer ring described in this utility model.

[0018] Figure 5 This is a partial structural schematic diagram of the retaining ring described in this utility model.

[0019] In the diagram: 1. Outer ring, 1-1. Flange, 1-2. Annular groove, 1-3. Annular groove, 1-4. Annular arc groove, 1-5. Oil injection hole, 2. Needle roller, 2-1. Cylindrical part, 2-2. Pointed head, 3. Retaining ring, 3-1. Support part, 3-2. Connecting part, 3-3. Limiting part, 3-4. Annular protrusion, 3-5. Folded edge, 3-6. Inner blind hole, 3-7. Outer blind hole. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0021] like Figures 1-5 The illustrated embedded solid full complement needle roller bearing includes an outer ring 1. The outer ring 1 has a cavity for mounting needle rollers 2. On both sides of the cavity are flanges 1-1 extending towards the center of the outer ring 1. An annular groove 1-2 is formed on the inner ring of the flange 1-1. Annular grooves 1-3 are formed at both ends of the inner cavity of the outer ring 1 to meet the machining requirements of the inner cavity surface of the outer ring 1. An annular arc groove 1-4 is formed in the middle of the outer circumferential surface of the outer ring 1. Four circumferentially distributed oil injection holes 1-5 are formed at the bottom of the annular arc groove 1-4. During bearing installation, lubricating oil can be added to the needle rollers 2 through the oil injection holes 1-5 to ensure lubrication during bearing use.

[0022] The needle rollers 2 are arranged sequentially along the circumference of the outer ring 1 cavity. The needle rollers 2 have a cylindrical part 2-1 and a pointed head 2-2 with an integral structure at both ends of the cylindrical part 2-1. The needle rollers 2 are located between the left and right side flanges 1-1. The outer periphery of the cylindrical part 2-1 of the needle rollers 2 is close to the inner wall of the outer ring 1 cavity and slightly protrudes from the inner edge of the side flange 1-1. The end face of the pointed head 2-2 is close to the inner side of the side flange 1-1.

[0023] The inner ring of the retaining edge 1-1 is embedded with a retaining ring 3. The retaining ring 3 includes an integral support part 3-1, a connecting part 3-2, and a limiting part 3-3. The connecting part 3-2 is located between the support part 3-1 and the limiting part 3-3. The support part 3-1 extends axially along the retaining ring 3 into the cavity of the outer ring 1. This allows the needle rollers 2 to be arranged between the inner wall of the cavity of the outer ring 1 and the support part 3-1, preventing the needle rollers 2 from falling out of the raceway of the outer ring 1. The connecting part 3-2 has an annular protrusion 3-4 formed by rolling. The annular protrusion 3-4 is engaged in the annular groove 1-2 to realize the engagement between the retaining ring 3 and the retaining edge 1-1.

[0024] The limiting part 3-3 has a folded edge 3-5 that bends towards the outer peripheral surface of the outer ring 1. When the retaining ring 3 is installed, the inner side of the folded edge 3-5 is attached to the outer wall of the retaining edge 1-1 to limit the installation position of the retaining ring 3 and prevent the supporting part 3-1 from contacting the needle roller 2 and affecting the normal movement of the needle roller 2.

[0025] The inner wall of the retaining ring 3 is formed with circumferentially distributed inner blind holes 3-6 and outer blind holes 3-7 by rolling. The inner blind hole 3-6 is a waist-shaped hole located inside the annular protrusion 3-4, and the outer blind hole 3-7 is a round hole located outside the annular protrusion 3-4. Thus, rolling the inner blind hole 3-6 forms a first protrusion on the outer wall surface of the retaining ring 3; rolling the outer blind hole 3-7 forms a second protrusion on the outer wall surface of the retaining ring 3. This increases the friction between the retaining ring 3 and the outer ring 1, making the two more firmly bonded and preventing the retaining ring 3 from falling off. At the same time, rolling can cause plastic deformation of the metal surface of the retaining ring 3, strengthening the surface layer, increasing hardness, and enhancing wear resistance.

[0026] When installing the retaining ring 3, an annular protrusion 3-4 can be rolled out on the retaining ring 3 first, and then the annular protrusion 3-4 can be inserted into the annular groove 1-2 to achieve the snap-fit ​​between the retaining ring 3 and the outer ring; or the unrolled retaining ring 3 can be placed directly in the inner hole of the retaining edge 1-1 of the outer ring 1, and then the annular protrusion 3-4 can be rolled out by rolling and inserted into the annular groove 1-2 to achieve the snap-fit ​​between the retaining ring 3 and the outer ring.

[0027] This invention places the needle rollers 2 between the retaining edges 1-1 on both sides of the outer ring 1 cavity. By embedding a retaining ring 3 inside the inner ring of the retaining edge 1-1, the needle rollers 2 are arranged between the inner wall of the outer ring 1 cavity and the support part 3-1 of the retaining ring 3. In this way, during the storage, transportation and installation of the needle roller bearing, the support part 3-1 can effectively prevent the needle rollers 2 from falling off, ensuring the normal use of the needle roller bearing.

[0028] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An insert type full complement pointed roller bearing comprising an outer ring (1) characterized in that: The cavity of the outer ring (1) has a stop edge (1-1) on each side, and needle rollers (2) are arranged in sequence between the stop edges (1-1) along the circumferential direction of the cavity of the outer ring (1), the needle rollers (2) have cylindrical portions (2-1), and the two ends of the cylindrical portions (2-1) have sharp head portions (2-2) respectively; the inner ring of the stop edge (1-1) is embedded with a stop ring (3), the stop ring (3) comprises a support portion (3-1), a connecting portion (3-2) and a limiting portion (3-3) in an integral structure, the connecting portion (3-2) is located between the support portion (3-1) and the limiting portion (3-3), the support portion (3-1) extends into the cavity of the outer ring (1) in the axial direction of the stop ring (3), the needle rollers (2) are located between the inner wall of the cavity of the outer ring (1) and the support portion (3-1), the connecting portion (3-2) is connected with the inner ring circumferential wall of the stop edge (1-1), and the limiting portion (3-3) is attached to the outer wall surface of the stop edge (1-1).

2. The fully embedded solid tangential roller bearing of claim 1, wherein: The connecting portion (3-2) has an annular protrusion (3-4) formed by rolling, and the inner ring of the stop edge (1-1) is provided with an annular clamping groove (1-2), the annular protrusion (3-4) is clamped into the annular clamping groove (1-2) to realize the clamping connection between the stop ring (3) and the stop edge (1-1).

3. The fully embedded solid tangential point contact needle bearing of claim 2, wherein: The limiting portion (3-3) has a folded edge (3-5), and the inner side surface of the folded edge (3-5) is attached to the outer wall surface of the stop edge (1-1) to limit the installation of the stop ring (3).

4. The fully embedded solid tangential point contact needle bearing of claim 2, wherein: The outer wall surface of the stop ring (3) has a first protruding portion formed by setting an inner blind hole (3-6) on the inner wall surface of the stop ring (3); and the outer wall surface of the stop ring (3) has a second protruding portion formed by setting an outer blind hole (3-7) on the inner wall surface of the stop ring (3).

5. The fully embedded solid tangential point contact needle bearing of claim 4, wherein: The inner blind hole (3-6) is located on the inner side of the annular protrusion (3-4), the outer blind hole (3-7) is located on the outer side of the annular protrusion (3-4), the inner blind hole (3-6) is a waist-shaped hole, and the outer blind hole (3-7) is a circular hole.

6. The fully embedded solid tangential point contact needle bearing of claim 1, wherein: The inner cavity of the outer ring (1) has annular grooves (1-3) at both ends.

7. The fully embedded solid tangential point contact needle bearing of claim 1, wherein: The outer circumferential surface of the outer ring (1) has an annular arc groove (1-4) in the middle, and the bottom of the annular arc groove (1-4) is provided with oil injection holes (1-5) which are uniformly distributed in the circumferential direction.

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