Cylindrical roller bearing

Abstract

The utility model discloses a cylindrical roller bearing which comprises an outer ring, an inner ring, a roller and a retainer, the retainer is arranged between the outer ring and the inner ring; the plurality of rollers are mounted in pockets of the retainer; the retainer consists of a retainer seat and a retainer cover; the retainer cover is connected to the end face of the retainer seat to limit the rollers; and the circumferential surface of each roller is in contact with the raceways of the inner ring and the outer ring respectively. The cylindrical roller bearing provided by the utility model has the advantages of high lubricity, low operating temperature and strong load fatigue resistance.

Description

Technical Field

[0001] The utility model is applied to the crankshaft of a railway tamping device and belongs to the mechanical field. Specifically, it relates to a cylindrical roller bearing. Background Art

[0002] Railway transportation, as a form of transportation, plays a backbone role among many transportation modes. Railway transportation has high requirements for the line, and the line needs to be maintained regularly to ensure the safety of railway transportation. The tamping device is the main part of a railway tamping car. When used for railway line maintenance, it tampers the ballast on both sides of the rail to improve the compactness of the ballast and enhance the stability of the track. The bearing is an important component in the tamping device, and the operating stability of the bearing directly affects the efficiency and quality of the tamping operation.

[0003] The bearing of the tamping device is installed on the crankshaft of the tamping device. The working conditions of the bearing are harsh, the continuous working time is long, and the bearing operates at a continuous high rotational speed during the working process, resulting in a high temperature during the working process. During the tamping process of the tamping device, the bearing is subjected to periodic impact loads. Considering the above working condition characteristics, the bearing of the tamping device is prone to fatigue due to the high internal working temperature of the bearing, insufficient lubrication, and the periodic impact loads on the bearing during operation, which affects the safe operation of the tamping device. Summary of the Utility Model

[0004] In view of the above-mentioned defects in the prior art, the utility model provides a cylindrical roller bearing with high lubricity, low operating temperature, and strong anti-load fatigue.

[0005] To achieve the above object, the following technical solutions are adopted: A cylindrical roller bearing includes an outer ring, an inner ring, rollers, and a cage; the cage is disposed between the outer ring and the inner ring; a plurality of the rollers are installed in the pockets of the cage; the cage consists of a cage seat and a cage cover; the cage cover is connected to the end face of the cage seat to limit the rollers; the circumferential surfaces of each of the rollers are respectively in contact with the raceways of the inner and outer rings.

[0006] Further, the rib of the outer ring of the bearing is set as an inclined rib; the angle between the inclined rib and the radial direction of the outer ring is β.

[0007] Further, β is 30~36'.

[0008] Further, the outer diameter and the rib of the outer ring are set as a slope; the angle between the slope and the axial direction of the outer ring is α.

[0009] Further, α is 15°.

[0010] Further, the distance between the slope and the rib of the outer ring is C1.

[0011] Further, C1 is 1.2 to 1.5 mm.

[0012] Further, an external oil groove is formed at the position where the body of the outer ring is connected to the rib of the outer ring.

[0013] Further, the chamfer size of the roller is smaller than the radial value of the external oil groove.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. A slope is designed between the outer inner diameter and the rib of the outer ring, and there is a certain width c1 between the slope and the rib of the outer ring, and the slope and the rib are smoothly transitioned, which helps the grease to enter the outer raceway of the outer ring during the operation of the bearing, so that the oil supply to the contact area between the outer ring and the roller of the bearing is sufficient, and prevents the bearing from suffering fatigue damage due to insufficient lubrication during high-speed operation.

[0016] 2. The rib of the bearing outer ring is designed as an inclined rib, and the inclination angle of the rib is relatively large. During the operation of the bearing, the lubrication state of the end face of the rolling element and the rib is improved, the wear of the raceway on the rib of the bearing at high rotational speed is reduced, and the operating temperature of the bearing is effectively reduced.

[0017] 3. The end face of the cylindrical roller is designed as a flat surface, and the chamfer size of the roller is smaller than the radial value of the oil groove of the outer ring, so that the contact position between the end face of the bearing roller and the rib of the outer ring is at the end face of the roller and the chamfer of the oil groove and the rib, which can effectively improve the bearing capacity of the bearing, enable the bearing to have a certain impact resistance, and effectively reduce the vibration of the bearing during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of the present utility model;

[0019] Figure 2 is a partial enlarged view of I of the present utility model;

[0020] In the figure: 01, outer ring; 02, inner ring; 04, roller; 16, cage cover; 86, cage seat; C1, distance between the slope and the rib of the outer ring; R, roller chamfer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following is a detailed description of the specific embodiments of the present utility model with reference to the drawings.

[0022] According to the attached Figure 1 and the attached Figure 2As shown in the figure, a cylindrical roller bearing according to this embodiment includes an outer ring 01, an inner ring 02, rollers 04 and a cage; the cage is disposed between the outer ring 01 and the inner ring 02; a plurality of the rollers 04 are installed in the pockets of the cage; the cage is composed of a cage seat 86 and a cage cover 16; the cage cover 16 is connected to the end face of the cage seat 86 to limit the rollers 04; the circumferential surfaces of each of the rollers 04 are respectively in contact with the raceways of the inner and outer rings.

[0023] Further, the rib of the bearing outer ring 01 is provided as an inclined rib; the angle between the inclined rib and the radial direction of the outer ring 01 is β.

[0024] Further, the β is 30~36'.

[0025] Further, the outer inner diameter and the rib of the outer ring 01 are provided as slopes; the angle between the slope and the axial direction of the outer ring 01 is α.

[0026] Further, the α is 15°.

[0027] Further, the distance between the slope and the rib of the outer ring 01 is C1.

[0028] Further, the C1 is 1.2~1.5 mm.

[0029] Further, an outer oil groove is formed at the position where the body of the outer ring 01 is connected to the rib of the outer ring 01.

[0030] Further, the chamfer size of the roller 04 is smaller than the radial value of the outer oil groove.

[0031] It should be noted that the total width of the cylindrical roller 04 bearing is 48 mm, the outer diameter of the bearing outer ring is 140 mm, and the wall thickness of the rib of the bearing outer ring is 8 mm.

[0032] The above embodiments are only the preferred embodiments of this patent, and do not limit the protection scope of the patent. Any equivalent changes and modifications made according to the scope of this patent and the content of the specification are within the scope covered by this patent.

Claims

1. A cylindrical roller bearing, characterized in that: It includes an outer ring, an inner ring, rollers and a cage; the cage is placed between the outer ring and the inner ring; a number of the rollers are installed in the pockets of the cage; the cage is composed of a cage seat and a cage cover; the cage cover is connected to the end face of the cage seat to limit the rollers; the circumferential surfaces of each of the rollers are respectively in contact with the raceways of the inner and outer rings.

2. The cylindrical roller bearing according to claim 1, characterized in that: The rib of the outer ring is set as an inclined rib; the angle between the inclined rib and the radial direction of the outer ring is β.

3. The cylindrical roller bearing according to claim 2, characterized in that: The β is 30~36'.

4. A cylindrical roller bearing according to claim 1 or 2, characterized in that: The outer diameter and the rib of the outer ring are set as slopes; the angle between the slope and the axial direction of the outer ring is α.

5. The cylindrical roller bearing according to claim 4, wherein: The α is 15°.

6. The cylindrical roller bearing according to claim 5, characterized in that: The distance between the slope and the rib of the outer ring is C1.

7. The cylindrical roller bearing according to claim 6, wherein: The C1 is 1.2~1.5mm.

8. A cylindrical roller bearing according to claim 1 or 7, characterized in that: An outer oil groove is formed at the position where the body of the outer ring is connected to the rib of the outer ring.

9. The cylindrical roller bearing according to claim 8, wherein: The chamfer size of the roller is smaller than the radial value of the outer oil groove.

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