Tapered roller bearing with novel oil grooves

Abstract

A novel tapered roller bearing with an oil groove comprises an outer ring, an inner ring, a tapered roller and a retainer, the tapered roller and the retainer are arranged between the outer ring and the inner ring in a matched mode, a roller path matched with the conical surface of the tapered roller is arranged on the outer wall of the inner ring, and flanges are arranged at the two ends of the roller path. Wherein the flange contacted with the large end of the tapered roller is a large flange, an oil groove is arranged at the joint of the large flange and the roller path, the section of the oil groove is arc-shaped, one side of the oil groove is connected with the bottom edge of the large flange, and the other side of the oil groove is connected with the surface of the roller path. The large flange has the advantages that the oil groove of the large flange does not go deep into the direction of the large flange, the thickness of the large flange is not reduced, and compared with the prior art, the strength of the flange is enhanced, so that cracks and even fractures at the oil groove are avoided, and the service life is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of tapered roller bearings, and in particular relates to a tapered roller bearing with a novel oil groove. Background Art

[0002] Tapered roller bearings are mainly used in mechanical parts with large axial forces. The bearings have a large rib structure to share part of the axial load. However, in manufacturing, due to the limitations of processing methods, there is usually an oil groove at the intersection of the large rib and the raceway. The oil groove is a back-off groove produced by fine grinding and is commonly called an oil groove in the industry. The current oil groove reduces the design thickness of the large rib and is also a stress concentration point in bearing applications. Cracks and even fractures are very likely to occur at the oil groove, which is the weak point of the rib. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to design a new tapered roller bearing with oil groove to solve the problem mentioned in the background technology that the existing oil groove reduces the design thickness of the large rib, resulting in cracks or even breakage in the oil groove.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a new type of tapered roller bearing with oil groove, comprising an outer ring, an inner ring, a tapered roller and a retaining frame, wherein the tapered roller and the retaining frame are matched and arranged between the outer ring and the inner ring, the outer wall of the inner ring is provided with a raceway matched with the conical surface of the tapered roller, and ribs are provided at both ends of the raceway, wherein the rib in contact with the large end of the tapered roller is a large rib, and an oil groove is provided at the connection between the large rib and the raceway, and the cross-section of the oil groove is an arc shape, one side of the oil groove is connected to the bottom edge of the large rib, and the other side is connected to the surface of the raceway.

[0005] The arc of the oil groove is tangent to the contact surface between the large rib and the tapered roller, and the depth direction of the oil groove is perpendicular to the surface of the raceway.

[0006] The intersection of the large rib and the extension line of the raceway surface is the tangent point of the arc of the oil groove and the large rib.

[0007] The arc radius of the oil groove is smaller than the chamfer radius of the large end of the tapered roller.

[0008] An oblique angle for transition is provided at the connection between the circular arc of the oil groove and the raceway.

[0009] The beneficial effects of the utility model are as follows: the oil groove of the large rib does not penetrate into the direction of the large rib, and the thickness of the large rib is not reduced. Compared with the existing technology, the strength of the rib is enhanced, thereby avoiding cracks or even breakages at the oil groove and ensuring the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a partial schematic diagram of the utility model.

[0011] Figure 2 for Figure 1 A partial enlarged schematic diagram of .

[0012] Figure 3 It is a schematic diagram of the large rib oil groove in the prior art.

[0013] In the figure: 1, inner ring, 101, large rib, 102, raceway, 103, oil groove, 104, bevel, 2, tapered roller, R, oil groove radius, R2, chamfer radius of the large end of the tapered roller. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings of this specification to clearly and completely describe the technical solution of the utility model. It should be noted that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-Figure 2 A novel tapered roller bearing with oil grooves comprises an outer ring, an inner ring 1, a tapered roller 2 and a cage, wherein the tapered roller 2 and the cage are arranged between the outer ring and the inner ring 1 in cooperation, the outer wall of the inner ring 1 is provided with a raceway 102 which is matched with the conical surface of the tapered roller 2, ribs are provided at both ends of the raceway 102, wherein the rib in contact with the large end of the tapered roller 2 is a large rib 101, an oil groove 103 is provided at the connection between the large rib 101 and the raceway 102, the cross section of the oil groove 103 is an arc shape, one side of the oil groove 103 is connected to the bottom edge of the large rib 101, and the other side is connected to the surface of the raceway 102. The arc of the oil groove 103 is tangent to the contact surface between the large rib 101 and the tapered roller 102, and the depth direction of the oil groove 103 is perpendicular to the surface of the raceway 102. The intersection of the large rib 101 and the extended line of the raceway 102 surface is the tangent point of the arc of the oil groove 103 and the large rib 101. The arc radius of the oil groove 103 is smaller than the large end chamfer radius of the tapered roller 2. The connection between the arc of the oil groove 103 and the raceway 102 is provided with an angle 104 for transition. Example

[0016] like Figure 2As shown, the inner side surface of the large rib 101 intersects with the extension line of the raceway 102 at point A, and an arc-shaped oil groove 103 is processed from point A. The arc-shaped oil groove 103 makes the large end of the tapered roller 2 contact the grease surface larger, which is beneficial to the maintenance of the bearing. The arc radius of the oil groove 103 is R, and forms an arc shape AB. The arc R of the oil groove 103 is tangent to the inner side surface of the large rib 101, and the tangent point is the intersection A of the inner side surface of the large rib 101 and the extension line of the raceway 102. Therefore, the depth direction of the oil groove 102 is toward the raceway 102, and will not go deep into the direction of the large rib 101; the arc radius R of the oil groove 103 is smaller than the chamfer radius R2 of the large end of the roller 2, and a bevel 104 for transition is set between the oil groove 103 and the raceway 102, which is easier to process than the rounded corner; Figure 3 According to the prior art, the oil groove 103 of the large rib 101 does not extend deep into the direction of the large rib 101, does not reduce the thickness of the large rib 101, and the strength of the large rib 101 is enhanced; the oil groove 103 is processed by hard turning the raceway 102 after heat treating the inner ring 1, replacing the existing grinding process.

[0017] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0018] The parts not described in detail in this utility model are prior art.

Claims

1. A novel tapered roller bearing with an oil groove, comprising an outer ring, an inner ring (1), a tapered roller (2) and a cage, wherein: The tapered roller (2) and the retaining frame are arranged in cooperation between the outer ring and the inner ring (1); the outer wall of the inner ring (1) is provided with a raceway (102) that cooperates with the conical surface of the tapered roller (2); both ends of the raceway (102) are provided with ribs, wherein the rib that contacts the large end of the tapered roller (2) is the large rib (101); an oil groove (103) is provided at the connection between the large rib (101) and the raceway (102); the oil groove (103) ) has a cross-section in the shape of an arc, one side of the oil groove (103) is connected to the bottom edge of the large rib (101), and the other side is connected to the surface of the raceway (102); the arc of the oil groove (103) is tangent to the contact surface between the large rib (101) and the tapered roller (2), and the depth direction of the oil groove (103) is perpendicular to the surface of the raceway (102); and a bevel (104) for transition is provided at the connection between the arc of the oil groove (103) and the raceway (102).

2. According to claim 1, a new tapered roller bearing with oil groove is characterized in that: The intersection of the large rib (101) and the extended line of the raceway (102) surface is the tangent point of the circular arc of the oil groove (103) and the large rib (101).

3. According to the novel tapered roller bearing with oil groove as claimed in claim 1, it is characterized by: The arc radius of the oil groove (103) is smaller than the large end chamfer radius of the tapered roller (2).

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