Full complement type needle bearing

Abstract

The utility model relates to a full complement type needle roller bearing which comprises a shell and a needle roller, gaskets close to cone end portions of two ends of the needle roller are respectively arranged in an inner hole of the shell, a check ring is installed in the inner hole of the shell on the outer sides of the gaskets, the check ring comprises a supporting section, a limiting section and a fixing section which are of an integrated structure, and the supporting section is connected with the lower end of the limiting section. The fixing section is connected with the upper end of the limiting section, the supporting section extends inwards in the axial direction of the inner cavity of the shell, the cone of the roller pin is located between the inner wall of the inner cavity of the shell and the supporting section, the limiting section presses the outer side face of the gasket, and the fixing section is connected with the inner circumferential face of the inner cavity of the shell in a riveting dotting mode. The needle roller is limited through the gasket, the needle roller is supported by the supporting section of the check ring to prevent the needle roller from falling off from the inner cavity of the shell, and the check ring and the shell are connected in a riveting dotting mode, so that in the process of storing, transporting and installing the needle roller bearing, the supporting section can effectively prevent the needle roller from falling off, and normal use of the needle roller bearing is guaranteed.

Description

Technical Field

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

[0002] Among bearing types, needle roller bearings are widely used in support structures where radial installation dimensions are limited due to their compact structure and high load-bearing capacity.

[0003] Depending on the application, needle roller bearings can be selected as bearings without inner rings or needle roller and cage assemblies. For full complement needle roller bearings, the needles are arranged circumferentially in the inner bore of the bearing housing, with the journal surface serving as the inner raceway and the inner bore surface of the housing serving as the outer raceway. To ensure that the load capacity and operating performance are the same as those of bearings with rings, the hardness, machining accuracy, and surface quality of the raceway surface of the shaft or housing bore should be similar to those of the bearing ring raceway.

[0004] However, since there is no inner ring support, for full complement needle roller bearings, it is necessary to solve the problem of the needle rollers disengaging from the raceway of the housing bore before use. Utility Model Content

[0005] 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 a full complement needle roller bearing with a simple structure that can effectively prevent needle roller slippage.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a full complement needle roller bearing, having a housing, wherein needle rollers are arranged sequentially along its circumference in the inner cavity of the housing, each needle roller comprising a cylinder, and each end of the cylinder having an integrally formed cone, and a washer located in the inner hole of the housing at both ends of the needle rollers, close to the small end of the cone, and a retaining ring installed in the inner hole of the housing outside the washer, the retaining ring comprising an integrally formed support section, a limiting section and a fixing section, the lower end of the support section being connected to the limiting section, the upper end of the fixing section being connected to the limiting section, the support section extending axially along the inner cavity of the housing, the cone of the needle roller being located between the inner wall of the inner cavity of the housing and the support section, the limiting section pressing against the outer surface of the washer, and the fixing section being connected to the inner circumferential surface of the inner cavity of the housing by riveting.

[0007] Specifically, the inner cavity of the outer shell has a stepped hole with a smaller inner diameter and a larger outer diameter. The needle roller is located in the smaller hole of the stepped hole. The larger hole of the stepped hole has an inner concave groove. The outer end of the fixed section is evenly distributed with riveted protrusions. The ends of the protrusions are riveted and pressed against the inner inclined surface of the inner concave groove.

[0008] Furthermore, the outer end of the fixed section is circumferentially distributed with six riveted protrusions.

[0009] To facilitate the installation and positioning of the retaining ring, the inner side of the gasket is pressed against the stepped surface of the stepped hole, and the limiting section presses against the outer side of the gasket.

[0010] Preferably, the hardness of the gasket material is greater than that of the retaining ring material to improve the wear resistance of the gasket.

[0011] To facilitate lubrication inside the bearing, the outer circumferential surface of the housing has an annular groove in the middle, and the bottom of the annular groove has circumferentially distributed oil filling holes.

[0012] The beneficial effects of this utility model are as follows: This utility model limits the needle rollers by using a gasket and installs a retaining ring on the outside of the gasket. The retaining ring supports the needle rollers and prevents them from falling out of the inner cavity of the housing. The retaining ring and the housing are connected by riveting and dotting. In this way, the support section can effectively prevent the needle rollers from falling off during storage, transportation and installation of the needle roller bearing, 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 three-dimensional structural schematic diagram of the retaining ring described in this utility model.

[0018] In the figure: 1. Outer shell, 1-1. Inner concave groove, 1-2. Annular groove, 1-3. Oil filling hole, 2. Needle roller, 2-1. Cylinder, 2-2. Cone, 3. Gasket, 4. Retaining ring, 4-1. Support section, 4-2. Limiting section, 4-3. Fixing section, 4-4. Outer protrusion. Detailed Implementation

[0019] 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.

[0020] like Figure 1 , Figure 2The illustrated full complement needle roller bearing has a housing 1. The inner cavity of the housing 1 is a stepped hole shape with a smaller inner diameter and a larger outer diameter. The larger portion of the stepped hole has an inwardly recessed groove 1-1. The outer circumferential surface of the housing 1 has an annular groove 1-2 in the middle. The bottom of the annular groove 1-2 has circumferentially distributed oiling holes 1-3 for adding lubricating oil to the needle rollers 2.

[0021] The roller needles 2 are arranged in sequence along the circumference of the small hole in the stepped hole. The roller needle 2 includes a cylinder 2-1 and two integral cones 2-2 at both ends of the cylinder 2-1. A shim 3 is provided at both ends of the roller needle 2 to limit the axial movement of the roller needle. The inner side of the shim 3 is close to the stepped surface of the stepped hole and close to the small end of the cone 2-2.

[0022] See Figure 3 , Figure 4 As shown, a retaining ring 4 is installed in the large hole of the stepped hole of the outer shell 1 on the outer side of the gasket 3. The retaining ring 4 includes a support section 4-1, a limiting section 4-2 and a fixing section 4-3, which are integrally structured. The lower end of the support section 4-1 is connected to the lower end of the limiting section 4-2, and the fixing section 4-3 is connected to the upper end of the limiting section 4-2. The support section 4-1 extends axially inward along the inner cavity of the outer shell 1. The cone 2-2 of the needle roller 2 is located between the inner wall of the inner cavity of the outer shell 1 and the support section 4-1. In this way, the support section 4-1 can support the needle roller 2 and prevent the needle roller 2 from falling out of the inner cavity of the outer shell 1.

[0023] When the limiting section 4-2 presses against the outer surface of the pad 3, the supporting section 4-1 extends below the cone 2-2 of the needle roller 2, and the inner end of the supporting section 4-1 does not contact the cone 2-2. This can limit the installation of the retaining ring 4.

[0024] The retaining ring 4 is connected to the inner circumferential surface of the inner cavity of the outer shell 1 by riveting. Specifically, six riveted protrusions 4-4 are evenly distributed on the outer end of the fixed section 4-3. After the ends of the protrusions 4-4 are riveted, they press against the inner inclined surface of the concave groove 1-1 to realize the connection between the retaining ring 4 and the outer shell 1.

[0025] Preferably, since the gasket 3 is inevitably subjected to axial impact from the needle roller 2 during the use of the bearing, the material hardness of the gasket 3 is selected to be greater than that of the retaining ring 4.

[0026] After arranging the needle rollers 2 along the inner cavity of the outer shell 1, place the gaskets 3 at both ends of the needle rollers 2, and then install the retaining rings 4. Use the limiting section 4-2 to press the outer side of the gaskets 3 to control the installation position of the retaining rings 4. Finally, use a riveting method to circumferentially rivet six external protrusions 4-4 at the outer end of the fixing section 4-3, so that the ends of the external protrusions 4-4 press against the inner inclined surface of the concave groove 1-1 in the inner cavity of the outer shell, thereby realizing the connection between the retaining rings 4 and the outer shell 1.

[0027] 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. A full complement needle roller bearing having a housing (1), characterized in that: The inner cavity of the outer shell (1) is provided with rollers (2) arranged sequentially along its circumference. Each roller (2) includes a cylinder (2-1) and two ends of the cylinder (2-1) are respectively provided with integrally formed cones (2-2). Gaskets (3) are respectively provided in the inner holes of the outer shell (1) at both ends of the rollers (2) and are close to the small ends of the cones (2-2). A retaining ring (4) is installed in the inner hole of the outer shell (1) outside the gasket (3). The retaining ring (4) includes an integrally formed support section (4-1) and a limiting section (4-2). 4-2) and fixed section (4-3), the support section (4-1) is connected to the lower end of the limiting section (4-2), the fixed section (4-3) is connected to the upper end of the limiting section (4-2), the support section (4-1) extends axially along the inner cavity of the outer shell (1), the cone (2-2) of the needle roller (2) is located between the inner wall of the inner cavity of the outer shell (1) and the support section (4-1), the limiting section (4-2) presses the outer side of the pad (3), and the fixed section (4-3) is connected to the inner circumferential surface of the inner cavity of the outer shell (1) by riveting and dotting.

2. The full complement needle roller bearing as described in claim 1, characterized in that: The inner cavity of the outer shell (1) has a stepped hole with a smaller inner diameter and a larger outer diameter. The needle roller (2) is located in the smaller hole of the stepped hole. The larger hole of the stepped hole is provided with an inwardly concave groove (1-1). The outer end of the fixed section (4-3) is evenly distributed with riveted protrusions (4-4). After the end of the protrusions (4-4) is riveted, it presses against the inner inclined surface of the inwardly concave groove (1-1).

3. The full complement needle roller bearing as described in claim 2, characterized in that: The fixed section (4-3) has six riveted protrusions (4-4) evenly distributed around its outer end.

4. The full complement needle roller bearing as described in claim 2, characterized in that: The inner side of the gasket (3) is pressed against the step surface of the step hole, and the limiting section (4-2) is pressed against the outer side of the gasket (3).

5. The full complement needle roller bearing as described in claim 1, characterized in that: The hardness of the gasket (3) is greater than that of the retaining ring (4).

6. The full complement needle roller bearing as described in claim 1, characterized in that: The outer casing (1) has an annular groove (1-2) in the middle of its outer peripheral surface, and the bottom of the annular groove (1-2) is provided with circumferentially distributed oil filling holes (1-3).

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