Double-toothed mouth step structure for self-sealing double-row tapered roller bearing

Abstract

The utility model provides a kind of double tooth mouth step structure for self-sealing double-row tapered roller bearing, double tooth mouth step structure is arranged in the inner circumferential surface end of outer ring, double tooth mouth step structure includes first tooth mouth groove and second tooth mouth groove sequentially arranged along bearing axial direction;First tooth mouth groove is located in the side close to bearing raceway, and second tooth mouth groove is located in the side away from bearing raceway;The groove bottom circumferential surface between first tooth mouth groove and the groove bottom circumferential surface of second tooth mouth groove is connected by an annular step surface extending along axial direction;It can be realized to avoid the local phosphating phenomenon of raceway due to liquid penetration, and double step tooth mouth also increases the grease storage space inside bearing, and the lubrication of running process is improved.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology, and in particular to a double-tooth stepped structure for a self-sealing double-row tapered roller bearing. Background Technology

[0002] Traditional toothed bearing raceways have only one groove. The raceway of this bearing is required to be free of phosphate layer, therefore it needs to be protected during the bearing phosphating process. However, during phosphating, phosphate seepage often occurs on individual bearing outer rings, causing localized phosphate formation on the raceway. This necessitates re-grinding and polishing of the raceway, increasing processing costs. Utility Model Content

[0003] In view of the above problems, the purpose of this application is to provide a double-stepped structure for a self-sealing double-row tapered roller bearing, which can avoid local phosphating of the raceway due to leakage, and at the same time, the double-stepped teeth also increase the grease storage space inside the bearing, thus improving lubrication during operation.

[0004] To achieve some or all of the above objectives or other objectives, this application provides the following technical solution: a double-tooth stepped structure for a self-sealing double-row tapered roller bearing, wherein the double-tooth stepped structure is disposed at the end of the inner circumferential surface of the outer ring, the double-tooth stepped structure includes a first tooth groove and a second tooth groove arranged sequentially along the bearing axial direction; the first tooth groove is located on the side close to the bearing raceway, and the second tooth groove is located on the side away from the bearing raceway; the bottom circumferential surface of the first tooth groove and the bottom circumferential surface of the second tooth groove are connected by an axially extending annular stepped surface.

[0005] Furthermore, the first tooth groove, the annular stepped surface, and the second tooth groove together constitute a stepped structure for increasing the grease storage space.

[0006] Furthermore, the cross-sectional shape of the first and second tooth grooves is one of arc, V-shape or rectangle.

[0007] Furthermore, the axial width of the first tooth groove is smaller than the axial width of the second tooth groove.

[0008] Furthermore, a sealing layer is provided in the first tooth groove, and a sealing ring is provided in the second tooth groove, so that at least two axially spaced protective barriers can be formed during the phosphating treatment of the bearing outer ring.

[0009] Furthermore, a self-sealing double-row tapered roller bearing includes the aforementioned double-tooth stepped structure.

[0010] Compared with the prior art, the beneficial effects of this utility model are: the tooth structure adopts a double tooth stepped design, and the phosphating process can be sealed with double teeth, which can effectively avoid local phosphating phenomenon in the raceway due to leakage. At the same time, the double-step tooth also increases the grease storage space inside the bearing, which improves the lubrication during operation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a self-sealing double-row tapered roller bearing. Figure 2 This is an enlarged schematic diagram of a double-toothed stepped structure; In the diagram: 1. First tooth groove, 2. Second tooth groove, 3. Annular stepped surface, 4. Sealing layer, 5. Sealing ring. Detailed Implementation

[0012] To make the structure and function of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0013] See appendix Figure 1-2 A double-tooth stepped structure for a self-sealing double-row tapered roller bearing is disclosed. The double-tooth stepped structure is disposed at the end of the inner circumferential surface of the outer ring. The double-tooth stepped structure includes a first tooth groove 1 and a second tooth groove 2 arranged sequentially along the bearing axial direction. The first tooth groove 1 is located on the side close to the bearing raceway, and the second tooth groove 2 is located on the side away from the bearing raceway. The bottom circumferential surface of the first tooth groove 1 and the bottom circumferential surface of the second tooth groove 2 are connected by an axially extending annular stepped surface 3.

[0014] The first tooth groove 1, the annular stepped surface 3, and the second tooth groove 2 together constitute a stepped structure for increasing the fat storage space.

[0015] The cross-sectional shape of the first tooth groove 1 and the second tooth groove 2 is one of arc, V-shape or rectangle.

[0016] The axial width of the first tooth groove 1 is smaller than the axial width of the second tooth groove 2.

[0017] The first tooth groove 1 is provided with a sealing layer 4, and the second tooth groove 2 is provided with a sealing ring 5, so that at least two axially spaced protective barriers can be formed during the phosphating treatment of the outer ring of the bearing.

[0018] A self-sealing double-row tapered roller bearing includes the aforementioned double-tooth stepped structure.

[0019] The double-tooth stepped structure of this application adds a step to the traditional toothed structure. During protective phosphating, multiple layers of protection can be achieved using the two grooves. Even if leakage occurs in the outermost layer, it will not affect the raceway, and no reprocessing of the raceway is required after phosphating. At the same time, the stepped structure increases the internal space of the bearing, increasing the grease storage space inside the bearing and improving the lubrication condition during long-term use.

[0020] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A double-tooth stepped structure for a self-sealing double-row tapered roller bearing, characterized in that: The double-tooth stepped structure is located at the end of the inner circumferential surface of the outer ring. The double-tooth stepped structure includes a first tooth groove (1) and a second tooth groove (2) arranged sequentially along the bearing axial direction. The first tooth groove (1) is located on the side close to the bearing raceway, and the second tooth groove (2) is located on the side away from the bearing raceway. The bottom circumferential surface of the first tooth groove (1) and the bottom circumferential surface of the second tooth groove (2) are connected by an axially extending annular stepped surface (3).

2. The double-tooth stepped structure according to claim 1, characterized in that: The first tooth groove (1), the annular step surface (3), and the second tooth groove (2) together constitute a stepped structure for increasing the fat storage space.

3. The double-tooth stepped structure according to claim 1, characterized in that: The cross-sectional shape of the first tooth groove (1) and the second tooth groove (2) is one of arc, V-shape or rectangle.

4. The double-tooth stepped structure according to claim 1, characterized in that: The axial width of the first tooth groove (1) is smaller than the axial width of the second tooth groove (2).

5. The double-tooth stepped structure according to claim 1, characterized in that: The first tooth groove (1) is provided with a sealing layer (4), and the second tooth groove (2) is provided with a sealing ring (5), so that at least two axially spaced protective barriers can be formed during the phosphating treatment of the outer ring of the bearing.

6. A self-sealing double-row tapered roller bearing, characterized in that: It includes a double-toothed stepped structure as described in any one of claims 1-5.

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