Box type oil seal of oil lubrication hub

Abstract

The utility model relates to an oil lubrication hub box type oil seal, which comprises an outer oil seal, a first inner oil seal and a second inner oil seal, the outer oil seal, the first inner oil seal and the second inner oil seal are mutually combined to form a labyrinth combination, the outer oil seal comprises an outer framework, the first inner oil seal comprises a first inner framework, and the second inner oil seal comprises a second inner framework. The first inner oil seal comprises a first inner framework, a first inner framework supporting part and a first inner rubber body are arranged on the first inner framework, the first inner rubber body comprises a first main lip, a first axial auxiliary lip and a first radial auxiliary lip, the second inner oil seal comprises a second inner framework, and a second inner rubber body is installed on the second inner framework. The second inner rubber body comprises a second auxiliary lip, a second axial auxiliary lip, a second rubber body supporting part I, a second rubber body supporting part II and a second rubber body sealing face. By the adoption of the technical scheme, the combined labyrinth design is adopted, multiple reliable protection functions are achieved, the hub oil seal can adapt to the severe muddy water environment, the muddy water prevention reliability is effectively improved, and meanwhile the lubricating oil sealing performance of the hub oil seal can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of oil seals, in particular to an oil-lubricated hub box type oil seal. Background Art

[0002] With the development of modern machinery and the complexity of the use environment, ordinary oil seals on the market cannot meet the requirements of high protection. Therefore, it is urgent to develop and design an oil seal that can adapt to the harsh muddy and water environment and also has the function of sealing lubricating oil to meet market needs and meet higher protection requirements. Summary of the invention

[0003] The utility model aims to provide an oil-lubricated wheel hub cassette oil seal, aiming to solve the problem that the existing cassette oil seal has insufficient sealing performance and does not have good functions of both sealing the lubricating oil in the wheel hub and preventing the invasion of external mud and water.

[0004] The technical solution adopted by the utility model is: an oil-lubricated hub box oil seal, comprising an outer oil seal, a first inner oil seal and a second inner oil seal, the outer oil seal, the first inner oil seal and the second inner oil seal are combined with each other to form a labyrinth combination, the outer oil seal comprises an outer skeleton, an outer skeleton sealing portion and an outer rubber sealing surface are arranged on the outer skeleton, the outer skeleton sealing portion is in interference contact with the mounting shell, and the outer rubber sealing surface is in interference fit with the mounting shell, the first inner oil seal comprises a first inner skeleton, a first inner skeleton supporting portion and a first inner rubber body are arranged on the first inner skeleton, the first inner skeleton supporting portion is against the inner side wall of the outer skeleton, the first inner rubber body comprises a first main lip, a first axial auxiliary lip and a first radial auxiliary lip, the second inner oil seal comprises a second inner skeleton, a second inner rubber body is installed on the second inner skeleton, the second inner rubber body comprises a second auxiliary lip, a second axial auxiliary lip, a second rubber body supporting portion I, a second rubber body supporting portion II and a second rubber body sealing surface, and the second rubber body supporting portion I is in interference contact with the first inner skeleton.

[0005] A further technical solution of the utility model is that the outer oil seal is also provided with a dustproof part to prevent the invasion of large particles of external impurities.

[0006] A further technical solution of the utility model is that a preload spring is arranged on the main lip to provide a preload force and a continuous and stable radial force to the first main lip.

[0007] The beneficial effect of the utility model is that due to the adoption of the above technical scheme, an oil-lubricated hub box oil seal of the utility model adopts a combined maze design, has multiple reliable protection functions, can adapt to harsh muddy and water environments, effectively improves the reliability of anti-muddy and water, and at the same time can meet the sealing lubricating oil performance of the hub oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of an oil-lubricated hub box oil seal described in the utility model;

[0009] Figure 2 It is a schematic diagram of the structure of the external oil seal of the utility model;

[0010] Figure 3 This is a schematic diagram of the structure of the first inner oil seal of the utility model;

[0011] Figure 4 It is a schematic structural diagram of the second inner oil seal of the utility model. DETAILED DESCRIPTION

[0012] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0013] Example:

[0014] like Figures 1 to 4 An oil-lubricated hub box oil seal is shown, an oil-lubricated hub box oil seal comprises an outer oil seal 1, a first inner oil seal 2 and a second inner oil seal 3, the outer oil seal, the first inner oil seal and the second inner oil seal are combined to form a labyrinth combination, the outer oil seal comprises an outer skeleton 13, the outer skeleton plays a role of supporting the outer oil seal, the outer skeleton is provided with an outer skeleton sealing part 11 and an outer rubber sealing surface 12, the outer skeleton sealing part is in interference contact with the mounting shell, so as to ensure accurate positioning during assembly, the outer rubber sealing surface is in interference fit with the mounting shell, so as to play a role of static sealing, the first inner oil seal 2 comprises a first inner skeleton, the first inner skeleton is provided with a first inner skeleton supporting part 21 and a first inner rubber body, the first inner skeleton supporting part 22 is provided with a first inner skeleton supporting part 23, and the first inner skeleton supporting part 24 is provided with a first inner rubber body. The portion 21 abuts against the inner wall of the outer skeleton 13, and plays a role in positioning the first inner oil seal. The first inner rubber body includes a first main lip 24, a first axial auxiliary lip 22 and a first radial auxiliary lip 23. The first main lip plays a role in preventing the lubricating oil in the internal cavity of the machine from leaking. The second inner oil seal 3 includes a second inner skeleton 33, on which a second inner rubber body is mounted. The second inner rubber body includes a second auxiliary lip 31, a second axial auxiliary lip 35, a second rubber body support portion I32, a second rubber body support portion II34 and a second rubber body sealing surface 36. The second rubber body support portion I32 is in interference contact with the first inner skeleton, and the second rubber body sealing surface 36 is in interference fit with the shaft to ensure static sealing with the shaft.

[0015] Furthermore, the outer oil seal is also provided with a dustproof portion 14 to prevent the invasion of large particles of external impurities.

[0016] Furthermore, a preload spring 25 is provided on the main lip to provide a preload force and a continuous and stable radial force to the first main lip.

[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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil-lubricated hub box oil seal, characterized in that: It includes an outer oil seal, a first inner oil seal and a second inner oil seal, which are combined with each other to form a labyrinth combination. The outer oil seal includes an outer skeleton, an outer skeleton sealing part and an outer rubber sealing surface are arranged on the outer skeleton, the outer skeleton sealing part is in interference contact with the mounting shell, and the outer rubber sealing surface is in interference fit with the mounting shell. The first inner oil seal includes a first inner skeleton, a first inner skeleton supporting part and a first inner rubber body are arranged on the first inner skeleton, the first inner skeleton supporting part is against the inner side wall of the outer skeleton, the first inner rubber body includes a first main lip, a first axial auxiliary lip and a first radial auxiliary lip. The second inner oil seal includes a second inner skeleton, a second inner rubber body is installed on the second inner skeleton, the second inner rubber body includes a second auxiliary lip, a second axial auxiliary lip, a second rubber body supporting part I, a second rubber body supporting part II and a second rubber body sealing surface, and the second rubber body supporting part I is in interference contact with the first inner skeleton.

2. The oil-lubricated hub box oil seal according to claim 1, characterized in that: The outer oil seal is also provided with a dustproof portion.

3. The oil-lubricated hub box oil seal according to claim 1, characterized in that: A preload spring is arranged on the main lip.

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