Lubricating-free high-rotating-speed dustproof hub sealing device

Abstract

The utility model discloses a lubrication-free high-rotating-speed dustproof hub sealing device, and relates to the technical field of hub sealing. The sealing structure comprises an inner oil seal and an outer oil seal, the inner oil seal comprises an inner sealing ring, and the sealing structure is characterized in that the inner sealing ring is radially provided with a main lip for sealing, and the main lip is provided with a lip opening for dust prevention; at least one auxiliary lip used for sealing is further arranged on the outer side of the inner sealing ring. Lubricating grease is coated in a cavity formed by the main lip, the auxiliary lip and the outer oil seal. The utility model has the beneficial effects that by adopting the structure, lubricating oil is prevented from polluting other parts, the dustproof effect is better, and the use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of hub sealing, and particularly relates to a non-lubricated high-speed dust-proof hub sealing device. Background Art

[0002] A hub is a cylindrical metal part that supports a tire inside the tire profile and is centered on a shaft. During the rotation of the hub, dust-proof sealing is required. The product is used at the position of the vehicle hub, with a rotational speed of 1500 rpm, a hole diameter of 400, and a linear velocity of about 31 m / s, which belongs to ultra-high speed. When the hub rotates, the lubricating oil in the traditional sealing device structure is thrown off due to rotational inertia, thus contaminating other parts. Moreover, there is a lot of dust, mud, etc. outside the hub, and ordinary oil seals are extremely prone to wear and failure, with a very high replacement frequency and expensive replacement costs. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a non-lubricated high-speed dust-proof hub sealing device in view of the above-mentioned existing technical deficiencies. This structure avoids the contamination of other parts by lubricating oil, has a better dust-proof effect, and is more convenient to use.

[0004] The technical solution adopted by the utility model is: to provide a non-lubricated high-speed dust-proof hub sealing device, including an inner oil seal and an outer oil seal. The inner oil seal includes an inner sealing ring, and is characterized in that: the inner sealing ring is radially provided with a main lip for sealing, and a lip for dust-proof is opened on the main lip; at least one auxiliary lip for sealing is also provided on the outer side of the inner sealing ring; lubricating grease is coated in the chambers formed by the main lip and the auxiliary lip and the outer oil seal.

[0005] Further optimizing the technical solution, the lubricating grease of a non-lubricated high-speed dust-proof hub sealing device is high-temperature resistant lubricating grease.

[0006] Further optimizing the technical solution, the lubricating grease of a non-lubricated high-speed dust-proof hub sealing device is high-temperature resistant lithium-based lubricating grease.

[0007] Further optimizing the technical solution, the auxiliary lip arranged axially of a non-lubricated high-speed dust-proof hub sealing device is thicker than the auxiliary lip arranged radially.

[0008] Further optimizing the technical solution, the inner oil seal of a non-lubricated high-speed dust-proof hub sealing device further includes an inner skeleton for supporting the inner sealing ring; the outer oil seal includes an outer skeleton and an outer sealing ring corresponding to and cooperating with the outer skeleton.

[0009] Further optimizing the technical solution, the contact positions of the outer skeleton of a non-lubricated high-speed dust-proof hub sealing device with the main lip and the auxiliary lip are subjected to polishing and phosphating treatment.

[0010] To further optimize this technical solution, the lip of a lubrication-free high-speed dust-proof hub sealing device is a stepped lip.

[0011] To further optimize this technical solution, the number of secondary lips of a lubrication-free high-speed dust-proof hub sealing device is three.

[0012] To further optimize this technical solution, the number of axially arranged secondary lips of a lubrication-free high-speed dust-proof hub sealing device is two; the number of radially arranged secondary lips is one.

[0013] Compared with traditional hub sealing devices, the beneficial effects of this utility model are as follows:

[0014] 1. The arrangement of secondary lips, main lips, and lips successively blocks and isolates external dust or muddy water, achieving a better dust-proof and sealing effect.

[0015] 2. The arrangement of main lips, secondary lips, and grease is used to prevent failure caused by dry friction of the lips and also prevent the lubricating oil from being flung away by inertia during rotation and polluting other parts.

[0016] 3. Since the rotational speed of the hub is relatively high, the grease is high-temperature-resistant lithium-based grease, which is not only convenient for lubrication but also high-temperature-resistant, with a longer service life.

[0017] 4. The outer skeleton is treated by polishing and phosphating to ensure its durability at high rotational speeds; the secondary lips are designed with different thicknesses according to different positions to prevent excessive friction at the secondary lips and thus cause excessive wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of this utility model;

[0019] Figure 2 is a schematic structural diagram of the lip part of this utility model;

[0020] In the figure, 1. Inner oil seal; 2. Outer oil seal; 3. Inner sealing ring; 4. Main lip; 5. Lip; 6. Secondary lip; 7. Inner skeleton; 8. Outer skeleton; 9. Outer sealing ring; 10. Chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes this utility model in detail in conjunction with the drawings and specific embodiments.

[0022] As Figure 1-2As shown in the figure, a non-lubricated high-speed dust-proof hub sealing device includes an inner oil seal 1 and an outer oil seal 2. The inner oil seal 1 includes an inner sealing ring 3, and is characterized in that: the inner sealing ring 3 is radially provided with a main lip 4 for sealing, and a lip opening 5 for dust prevention is formed on the main lip 4; at least one auxiliary lip 6 for sealing is further provided on the outer side of the inner sealing ring 3; lubricating grease is coated in the chamber 10 formed by the main lip 4 and the auxiliary lip 6 and the outer oil seal 2; the lubricating grease is high-temperature resistant lubricating grease; the lubricating grease is high-temperature resistant lithium-based lubricating grease; the axially arranged auxiliary lip 6 is thicker than the radially arranged auxiliary lip 6; the inner oil seal 1 further includes an inner skeleton 7, and the inner skeleton 7 is used to support the inner sealing ring 3; the outer oil seal 2 includes an outer skeleton 8 and an outer sealing ring 9 corresponding to and cooperating with the outer skeleton 8; the contact positions of the outer skeleton 8 with the main lip 4 and the auxiliary lip 6 are subjected to polishing and phosphating treatment; the lip opening 5 is a stepped lip opening 5; the number of the auxiliary lips 6 is three; the number of axially arranged auxiliary lips 6 is two; the number of radially arranged auxiliary lips 6 is one.

[0023] The specific structure of the inner sealing ring 3 is as Figure 1 shown; the main lip 4 is in interference fit with the outer skeleton 8; the radially arranged auxiliary lip 6 is in interference fit with the outer skeleton 8; a chamber 10 is formed between the main lip 4 and the auxiliary lip 6 and the outer oil seal 2, and the specific position of the chamber 10 is as Figure 1 shown;

[0024] During use, multiple auxiliary lips 6 arranged externally sequentially block and isolate external dust or muddy water. Coupled with the lip opening 5 formed on the main lip 4, both ends of the lip opening 5 further block and isolate dust or muddy water, and the dust-proof and sealing effect is better;

[0025] The lubricating grease at the main lip 4 and the auxiliary lip 6 is used to prevent the failure caused by dry grinding of the lip opening 5. Since the hub rotates on the outer circle, the main lip 4 and the auxiliary lip 6 are both designed on the inner oil seal 1 to prevent the lubricating oil from being thrown off by inertia during rotation and polluting other parts;

[0026] The auxiliary lips 6 are designed with different thicknesses according to different positions to prevent excessive friction with the outer skeleton 8 due to the excessive thickness of the auxiliary lips 6 and prevent excessive friction at the auxiliary lips 6 from causing large wear;

[0027] The rotation speed of the hub is relatively high, belonging to ultra-high speed, resulting in a relatively high temperature at the contact positions of the outer skeleton 8 with the main lip 4 and the auxiliary lip 6. The lubricating grease is high-temperature resistant lithium-based lubricating grease, which is not only convenient for lubrication but also high-temperature resistant and has a longer service life; the contact positions of the outer skeleton 8 with the main lip 4 and the auxiliary lip 6 are subjected to polishing and phosphating treatment to ensure its durability under high-speed conditions.

[0028] It should be understood that the above specific embodiments of the present utility model are only used for exemplary illustration or explanation of the principle of the present utility model, and do not constitute a limitation to the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present utility model shall be included within the protection scope of the present utility model. In addition, the appended claims of the present utility model are intended to cover all variations and modifications that fall within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A lubrication-free high-speed dust-proof hub sealing device, comprising an inner oil seal (1) and an outer oil seal (2), the inner oil seal (1) including an inner sealing ring (3), characterized in that: The inner sealing ring (3) is radially provided with a main lip (4) for sealing, and a lip opening (5) for dust prevention is formed on the main lip (4); at least one auxiliary lip (6) for sealing is further arranged on the outer side of the inner sealing ring (3); grease is coated in the chambers (10) formed by the main lip (4) and the auxiliary lip (6) and the outer oil seal (2).

2. The non-lubricated high-speed dust-proof hub sealing device according to claim 1, characterized in that: The grease is high-temperature resistant grease.

3. The non-lubricated high-speed dust-proof hub sealing device according to claim 1, characterized in that: The grease is high-temperature resistant lithium-based grease.

4. A lubrication-free high-speed dust-proof hub sealing device according to claim 1, characterized in that: The auxiliary lip (6) arranged axially is thicker than the auxiliary lip (6) arranged radially.

5. The non-lubricated high-speed dust-proof hub sealing device according to claim 1, characterized in that: The inner oil seal (1) further comprises an inner skeleton (7) for supporting the inner sealing ring (3); the outer oil seal (2) comprises an outer skeleton (8) and an outer sealing ring (9) correspondingly matched with the outer skeleton (8).

6. The non-lubricating high-speed dust-proof hub sealing device according to claim 5, characterized in that: The contact positions of the outer skeleton (8) with the main lip (4) and the auxiliary lip (6) are subjected to polishing and phosphating treatment.

7. The non-lubricated high-speed dust-proof hub sealing device according to claim 1, characterized in that: The lip opening (5) is a stepped lip opening (5).

8. A lubrication-free high-speed dust-proof hub sealing device according to claim 1, characterized in that: The number of the auxiliary lips (6) is three.

9. The non-lubricating high-speed dust-proof hub sealing device according to claim 8, characterized in that: The number of the axially arranged auxiliary lips (6) is two; the number of the radially arranged auxiliary lips (6) is one.

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