A self-protective herringbone lip seal for a slewing bearing

Abstract

The utility model discloses a self-protective herringbone lip seal ring for a turntable bearing. The turntable bearing includes a bearing inner ring and a bearing outer ring. The bearing inner ring has an axial surface, and an oil sealing groove is provided inside the axial surface. The bearing outer ring has a circumferential sealing groove. The self-protective herringbone lip seal ring for the turntable bearing includes an annular rubber seal body. One side of the annular rubber seal body has a mounting portion that can extend into the circumferential sealing groove, and the other side has a water-sealing limb and an oil-sealing limb. The water-sealing limb is used to seal the axial surface of the bearing inner ring, and the oil-sealing limb is used to seal the oil sealing groove inside the axial surface. The turntable bearing also includes an annular rubber protective cover that can cover the outside of the annular rubber seal body. The two ends of the annular rubber protective cover are respectively connected to the outer side of the end of the water-sealing limb and the outer side of the end of the annular rubber seal body through a tearable annular root. After the turntable bearing uses the utility model, it is not necessary to replace the rubber seal ring after sandblasting and anti-corrosion treatment.

Description

Technical Field

[0001] The utility model relates to a self-protective fishbone lip sealing ring for a turntable bearing. Background Art

[0002] The herringbone lip seal ring for turntable bearings in the prior art comprises a bearing inner ring and a bearing outer ring, and a herringbone lip seal ring is installed on the turntable bearing. The water-sealing limb of the herringbone lip seal ring is used to seal the axial surface of the bearing inner ring, and the oil-sealing limb is used to seal the oil-sealing groove inside the axial surface. The cross-sectional lip shape of the oil-sealing limb is similar to a herringbone shape. After the turntable bearing is assembled, the bearing inner ring and the bearing outer ring need to be sandblasted and anti-corrosion treated. In order to prevent the medium from entering the bearing, the prior art mostly installs the above-mentioned rubber seal ring on the bearing first, and then removes and scraps the seal ring after the sandblasting and anti-corrosion treatment is completed, and replaces it with a new rubber seal ring.

[0003] Since the original rubber sealing ring needs to be scrapped as a whole after sandblasting and anti-corrosion treatment, this undoubtedly increases the production and manufacturing cost of the slewing bearing and affects the work efficiency of on-site operators. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a self-protective fishbone lip seal ring for a slewing bearing with a simple structure. After the slewing bearing is applied with the utility model, it is unnecessary to replace the rubber seal ring after sandblasting and anti-corrosion treatment.

[0005] In order to solve the above technical problems, the utility model provides a self-protective herringbone lip seal ring for a slewing bearing, the slewing bearing comprising a bearing inner ring and a bearing outer ring, the bearing inner ring having an axial surface, an oil sealing groove being provided on the inner side of the axial surface, and the bearing outer ring having a circumferential sealing groove, the self-protective herringbone lip seal ring for the slewing bearing comprising an annular rubber sealing body, one side of the annular rubber sealing body having a mounting portion which can be extended into the circumferential sealing groove, and the other side having a water-sealing limb and an oil-sealing limb, the water-sealing limb being used to seal the axial surface of the bearing inner ring, and the oil-sealing limb being used to seal the oil sealing groove on the inner side of the axial surface, characterized in that it also comprises an annular rubber protective cover which can cover the outer side of the annular rubber sealing body, and the two ends of the annular rubber protective cover are respectively connected to the outer side of the end of the water-sealing limb and the outer side of the end of the annular rubber sealing body through a tearable annular root.

[0006] As an improvement of the utility model, annular protrusions are arranged at intervals on the inner wall of the annular rubber protective cover.

[0007] The utility model has the following beneficial technical effects: 1. Due to the provision of an annular rubber protective cover, when the slewing bearing is subjected to sandblasting and anti-corrosion treatment, the annular rubber protective cover can cover the annular rubber sealing body as a whole. After the sandblasting and anti-corrosion treatment are completed, the annular rubber protective cover can be directly torn off by hand without having to replace the rubber sealing ring, thereby reducing the production cost. In the utility model, the two ends of the protective cover are respectively connected to the outer side of the end of the water-sealing limb and the rubber sealing body through the tearable annular root, and the structure is simpler; 2. After annular protrusions are also arranged at intervals on the inner wall of the annular rubber protective cover, when the utility model is subjected to the vulcanization process, the large-area adhesion phenomenon between the inner wall of the annular rubber protective cover and the outer wall of the annular rubber sealing body can be avoided, and the tearing operation of the protective cover after the sandblasting and anti-corrosion treatment is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0009] Figure 1 The utility model is a partial cross-sectional structural schematic diagram of a self-protective herringbone lip sealing ring for a slewing bearing.

[0010] Figure 2 yes Figure 1 The enlarged view of the structure at position I shows an enlarged structure in which one end of the annular rubber protective cover is connected to the outer side of the end of the water-sealing limb through a tearable annular root.

[0011] Figure 3 yes Figure 1 The enlarged view of the structure at II in the middle shows the enlarged structure in which the other end of the annular rubber protective cover is connected to the outer side of the end of the annular rubber sealing body through a tearable annular root.

[0012] Figure 4 yes Figure 1 The enlarged view of the structure at point III shows the enlarged structure of the annular protrusion on the inner wall of the annular rubber protective cover.

[0013] Figure 5 It is a partial cross-sectional structural schematic diagram of the utility model when it is installed on a turntable bearing.

[0014] Figure 6 It is a partial cross-sectional structural schematic diagram of the utility model when it is installed on a turntable bearing, and shows the state after the rubber protective cover is torn off. DETAILED DESCRIPTION

[0015] See also Figure 1 - Figure 6The utility model discloses a self-protective herringbone lip seal ring for a turntable bearing. The turntable bearing comprises a bearing inner ring 10 and a bearing outer ring 20. The bearing inner ring has an axial surface 11, and an oil sealing groove 12 is provided inside the axial surface. The bearing outer ring has a circumferential sealing groove 21. The self-protective herringbone lip seal ring 30 for the turntable bearing comprises an annular rubber seal body 31. One side of the annular rubber seal body has a mounting portion 32 that can be inserted into the circumferential sealing groove, and the other side has a water sealing limb 33 and an oil sealing limb 34. The water sealing limb is used to seal the axial surface of the bearing inner ring, and the oil sealing limb is used to seal the oil sealing groove inside the axial surface. The utility model is characterized in that: it also comprises an annular rubber protective cover 35 that can cover the outer side of the annular rubber seal body. The two ends of the annular rubber protective cover are respectively connected to the outer side of the end of the water sealing limb 33 and the outer side of the end of the annular rubber seal body 31 through a tearable annular root 351. Annular protrusions are also arranged at intervals on the inner wall of the annular rubber protective cover.

[0016] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Any modification or equivalent replacement of the utility model to achieve the same technical effect is within the protection scope of the utility model.

Claims

1. A self-protective herringbone lip seal ring for a slewing bearing, the slewing bearing comprising a bearing inner ring (10) and a bearing outer ring (20), the bearing inner ring having an axial surface (11), an oil sealing groove (12) being provided on the inner side of the axial surface, the bearing outer ring having a circumferential sealing groove (21), the self-protective herringbone lip seal ring (30) for a slewing bearing comprising an annular rubber seal body (31), one side of the annular rubber seal body having a mounting portion (32) which can extend into the circumferential sealing groove, and the other side having a water sealing limb (33) and an oil sealing limb (34), the water sealing limb being used to seal the axial surface of the bearing inner ring, and the oil sealing limb being used to seal the oil sealing groove on the inner side of the axial surface, characterized in that: It also includes an annular rubber protective cover (35) that can cover the outside of the annular rubber sealing body, and the two ends of the annular rubber protective cover are respectively connected to the outside of the end of the water sealing limb (33) and the outside of the end of the annular rubber sealing body (31) through tearable annular roots (351).

2. The self-protecting herringbone lip seal ring for a slewing bearing according to claim 1, characterized in that: Annular protrusions (352) are also arranged at intervals on the inner wall of the annular rubber protective cover (35).

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