Needle bearing with dustproof function

Abstract

The utility model relates to a needle roller bearing with a dustproof function, which comprises an outer ring and a needle roller, an inner ring is arranged in the outer ring, a retainer used for fixing the needle roller is arranged between the outer ring and the inner ring, the inner ring is connected with the needle roller in a rolling manner, dustproof devices are sleeved at openings on two sides of the outer ring, each dustproof device comprises an opening type dustproof sleeve, and the opening type dustproof sleeves are sleeved on the inner ring. And a locking piece rotationally connected with the dustproof sleeve through threads is arranged outside the dustproof sleeve. The rolling needle bearing is reasonable in structure, dust can be prevented from entering the rolling needle bearing, friction force increase caused by the fact that the friction position of the rolling needle and the inner ring is affected by the dust or other impurities in the air is avoided, loss caused in the using process is reduced, the service life of the rolling needle bearing is prolonged, and meanwhile damage to the friction position of the rolling needle bearing due to the impurities can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a needle roller bearing with a dust-proof function. Background Art

[0002] A needle roller bearing is a roller bearing with cylindrical rollers. The rollers are thin and long relative to their diameter. The cross-section of the needle roller bearing is small, but it has a high load-bearing capacity. Because of its compact radial structure, when its inner diameter size and load capacity are the same as those of other types of bearings, its outer diameter is the smallest. It is particularly suitable for support structures where the radial installation size is limited, and most internal combustion engine rocker arms use this type of bearing. Existing needle roller bearings are usually composed of an outer ring, an inner ring, a cage and needle rollers. Dust or other impurities in the air easily enter the friction areas between the needle rollers and the inner and outer rings, resulting in increased losses during use, unnecessary wear, reduced service life of the bearing, and even damage to the needle roller bearing in severe cases. Content of the Utility Model

[0003] In order to overcome the deficiencies of the above-mentioned existing problems, the utility model provides a needle roller bearing with a dust-proof function.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a needle roller bearing with a dust-proof function, including an outer ring and needle rollers. An inner ring is arranged inside the outer ring, and a cage for fixing the needle rollers is arranged between the outer ring and the inner ring. The inner ring is in rolling connection with the needle rollers. Dust-proof devices are sleeved at the openings on both sides of the outer ring. The dust-proof device includes an open-type dust-proof sleeve, and a locking member is arranged outside the dust-proof sleeve and is rotationally connected to the dust-proof sleeve through a thread. During use, the dust-proof sleeve is fixed at the openings on both sides of the outer ring through the cooperation of the dust-proof sleeve and the locking member.

[0005] Preferably, a hole with the same outer diameter as the inner ring is opened in the middle of the dust-proof sleeve. During use, the dust-proof device will not affect the rotation of the inner ring.

[0006] Preferably, a circle of sealing rings is evenly distributed on both sides of the inner wall of the outer ring far from the cage. The side of the sealing ring far from the cage fits with the dust-proof sleeve, which can effectively prevent dust or impurities in the air from entering the inside of the needle roller bearing through the gap between the outer ring and the dust-proof sleeve.

[0007] Preferably, heat dissipation fins are arranged on the side of the dust-proof sleeve far from the outer ring. During use, the heat generated by the friction inside the needle roller bearing is discharged outward through the dust-proof sleeve via the heat dissipation fins.

[0008] Preferably, grooves that fit the shape of the dust-proof sleeve are arranged on both sides of the outer surface of the outer ring, and the outer diameter of the outer surface of the outer ring where there are no grooves is greater than the outer diameter of the dust-proof sleeve, which can prevent the locking member from exceeding the dust-proof sleeve during use.

[0009] The beneficial effects of the present utility model are as follows: it can prevent dust from entering the inside of the needle roller bearing, so as to avoid the friction between the needle roller and the inner ring being affected by dust or other impurities in the air, resulting in an increase in friction force, reducing the loss caused during use, extending the service life of the needle roller bearing, and at the same time avoiding damage to the friction part of the needle roller bearing caused by impurities. In addition, through the combined use of the sealing ring and the heat sink, heat can be quickly discharged, further reducing the loss. Description of the Drawings

[0010] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0011] Figure 1 is the front view of the present utility model;

[0012] Figure 2 is the left view of the present utility model;

[0013] Figure 3 is Figure 1 the sectional view taken along the A-A direction in

[0014] Figure 4 is Figure 2 the sectional view taken along the B-B direction in

[0015] Figure 5 is the disassembled front view of the dust-proof device of the present utility model;

[0016] Figure 6 is the disassembled right view of the dust-proof device of the present utility model;

[0017] Figure 7 is the front view of the outer ring of the present utility model;

[0018] In the figure, 1. outer ring; 2. inner ring; 3. needle roller; 4. cage; 5. dust-proof device; 6. dust-proof sleeve; 7. locking part; 8. hole; 9. sealing ring; 10. groove; 11. heat sink. Detailed Embodiments

[0019] All the features disclosed in this specification, or all the steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any manner.

[0020] Any feature disclosed in this specification (including any additional claims, abstract, and drawings), unless specifically stated, can be replaced by other equivalent or features with similar purposes. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features.

[0021] Such as Figures 1-6A kind of needle roller bearing with dust-proof function as shown in the figure includes an outer ring 1 and needle rollers 3. An inner ring 2 is arranged inside the outer ring 1. A cage 4 for fixing the needle rollers 3 is arranged between the outer ring 1 and the inner ring 2. The inner ring 2 is in rolling connection with the needle rollers 3. Dust-proof devices 5 are sleeved at the openings on both sides of the outer ring 1. The dust-proof device 5 includes an open dust-proof sleeve 6. A locking member 7 is arranged outside the dust-proof sleeve 6 and is rotationally connected to the dust-proof sleeve 6 through threads. When in use, the dust-proof sleeve 6 is fixed at the openings on both sides of the outer ring 1 by the cooperation of the dust-proof sleeve 6 and the locking member 7, which can prevent dust from entering the inside of the needle roller bearing from both sides, and improve the service life.

[0022] A hole 8 equal to the outer diameter of the inner ring is opened in the middle of the dust-proof sleeve 6. When in use, the dust-proof device 5 will not affect the rotation of the inner ring 2.

[0023] A circle of sealing rings 9 is evenly distributed on both sides of the inner wall of the outer ring 1 far away from the cage 4. One side of the sealing ring 9 far away from the cage 4 is attached to the dust-proof sleeve 6, which can effectively prevent dust or impurities in the air from entering the inside of the needle roller bearing through the gap between the outer ring 1 and the dust-proof sleeve 6.

[0024] Heat dissipation fins 11 are arranged on the side of the dust-proof sleeve 6 far away from the outer ring 1. When in use, the heat generated by the friction inside the needle roller bearing is discharged outward through the dust-proof sleeve 6 via the heat dissipation fins 11.

[0025] Grooves 10 that fit the shape of the dust-proof sleeve 6 are arranged on both sides of the outer surface of the outer ring 1, and the outer diameter of the part of the outer surface of the outer ring 1 where there are no grooves 10 is larger than the outer diameter of the dust-proof sleeve 6. When in use, it prevents the locking member 7 from exceeding the dust-proof sleeve 6.

[0026] This design is ingenious. It can prevent dust from entering the inside of the needle roller bearing, so as to avoid the influence of dust or other impurities in the air on the friction parts between the needle rollers and the inner and outer rings, resulting in an increase in friction force, reducing the loss during use, extending the service life of the needle roller bearing, and at the same time avoiding damage to the friction parts of the needle roller bearing caused by impurities. In addition, through the combined use of the sealing ring and the heat dissipation fin, the heat can be quickly discharged, further reducing the loss.

[0027] The present utility model is not limited to the foregoing specific embodiments. The present utility model extends to any new feature or any new combination disclosed in this specification, as well as any new method or process step or any new combination disclosed.

Claims

1. A needle roller bearing with a dust-proof function, characterized in that: It includes an outer ring (1) and needle rollers (3). An inner ring (2) is arranged inside the outer ring (1). A cage (4) for fixing the needle rollers (3) is arranged between the outer ring (1) and the inner ring (2). The inner ring (2) is in rolling connection with the needle rollers (3). Dust-proof devices (5) are sleeved at the openings on both sides of the outer ring (1). The dust-proof device (5) includes an open dust-proof sleeve (6). A locking member (7) that is rotationally connected to the dust-proof sleeve (6) by threads is arranged outside the dust-proof sleeve (6).

2. The needle roller bearing with a dust-proof function according to claim 1, characterized in that: A hole (8) with the same outer diameter as the inner ring is formed in the middle of the dust-proof sleeve (6).

3. A needle roller bearing with a dust-proof function according to claim 1, characterized in that: A circle of sealing rings (9) is evenly distributed on both sides of the inner wall of the outer ring (1) far from the cage (4). One side of the sealing ring (9) far from the cage (4) is in contact with the dust-proof sleeve (6).

4. A needle roller bearing with a dust-proof function according to claim 1, characterized in that: A heat sink (11) is arranged on the side of the dust-proof sleeve (6) far from the outer ring (1).

5. A needle roller bearing with a dust-proof function according to claim 1, characterized in that: Grooves (10) that are shape-fitting with the dust-proof sleeve (6) are arranged on both sides of the outer surface of the outer ring (1), and the outer diameter of the part of the outer surface of the outer ring (1) where the grooves (10) are not arranged is larger than the outer diameter of the dust-proof sleeve (6).

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