Dual labyrinth single lip contact hub oil seal

Abstract

The utility model discloses a kind of double labyrinths single-lip contact wheel hub oil seal, it is related to bearing sealing technical field, comprising: inner sealing assembly, the inner sealing assembly is used to cooperate outer sealing assembly and form seal;And outer sealing assembly, the outer sealing assembly includes the support framework fixed in the inner side of bearing outer ring, rubber seal ring is fixed with the sleeve connection outside the support framework, the rubber seal ring is sequentially provided with first labyrinth lip, second labyrinth lip and contact sealing lip from outside to inside, the contact sealing lip is closely adhered with the outer wall of sealing cover. The utility model has double labyrinths structure, after determining after the product physical use, product slurry guiding effect is better, further improve sealing performance, simultaneously, only rely on the close adhesion of contact sealing lip and sealing cover between inner sealing assembly and outer sealing assembly can realize sealing, relatively smaller friction, effectively reduce torque.

Description

Technical Field

[0001] This utility model relates to the field of bearing sealing technology, and in particular to a double labyrinth single-lip contact wheel hub oil seal. Background Technology

[0002] Wheel hub oil seals are key sealing components in automotive wheel hub systems. They are mainly used to protect wheel hub bearings, prevent grease leakage from inside the wheel hub, ensure that the bearings are always in a lubricated state, and reduce wear. In existing technologies, to facilitate the rapid discharge of mud and water that enters the inside of the oil seal, most oil seals are equipped with a labyrinth structure.

[0003] However, most existing wheel hub oil seals only have a single labyrinth structure, and the mud and water guiding effect needs to be improved. At the same time, the rubber sealing ring and the sealing cover often adopt a multi-lip sealing structure, which leads to greater friction between the rubber sealing ring and the sealing cover.

[0004] Therefore, it is necessary to invent a double labyrinth single-lip contact hub oil seal to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a double labyrinth single-lip contact wheel hub oil seal, which has a double labyrinth structure, better mud and water guidance effect, and further improves sealing performance. At the same time, the inner sealing component and the outer sealing component can achieve sealing by only relying on the tight fit between the contact sealing lip and the sealing cover, resulting in relatively low friction and effectively reducing torque. This solves the problem mentioned in the background art that most existing wheel hub oil seals only have a single labyrinth structure, and the mud and water guidance effect needs to be improved. In addition, the rubber sealing ring and the sealing cover often adopt a multi-lip sealing structure, which leads to high friction between the rubber sealing ring and the sealing cover.

[0006] According to one aspect of this disclosure, the following technical solution is provided: a double labyrinth single-lip contact wheel hub oil seal, comprising:

[0007] An inner sealing assembly, which is used to cooperate with an outer sealing assembly to form a seal; and

[0008] An external sealing assembly includes a support frame fixed to the inner side of the outer ring of the bearing. A rubber sealing ring is sleeved and fixed to the outer side of the support frame. The rubber sealing ring is provided with a first labyrinth lip, a second labyrinth lip and a contact sealing lip from the outside to the inside. The contact sealing lip is tightly fitted to the outer wall of the sealing cover.

[0009] According to at least one embodiment of the present disclosure, a double labyrinth single-lip contact hub oil seal includes an inner sealing assembly comprising a sealing cap fixedly sleeved on the outer side of the inner ring of the bearing, wherein a rubber guide ring is sleeved and fixed on the outer side of the sealing cap.

[0010] According to at least one embodiment of the present disclosure, in the double labyrinth single-lip contact hub oil seal, the bottom of the rubber guide ring is provided with a first guide portion and a second guide portion from the outside to the inside, the first guide portion is located outside the first labyrinth lip, and the second guide portion is located between the first labyrinth lip and the second labyrinth lip.

[0011] According to at least one embodiment of the present disclosure, a double labyrinth single-lip contact hub oil seal has a blocking lip provided on the inner side of the rubber sealing ring. The blocking lip is inclined downward and a clearance gap is provided between the blocking lip and the sealing cover.

[0012] According to at least one embodiment of the present disclosure, a double labyrinth single-lip contact hub oil seal is provided in which the rubber guide ring, the first guide portion, and the second guide portion are integrally formed.

[0013] According to at least one embodiment of the present disclosure, a double labyrinth single-lip contact hub oil seal is provided in which the rubber sealing ring, the first labyrinth lip, the second labyrinth lip, the contact sealing lip, and the blocking lip are integrally formed.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] This invention features a first labyrinth lip, a second labyrinth lip, a contact sealing lip, and a blocking lip. The contact sealing lip is tightly fitted to the sealing cap, while a clearance gap exists between the blocking lip and the sealing cap. This allows external mud and water to enter through the annular channel between the rubber guide ring and the rubber sealing ring. The first labyrinth formed by the first labyrinth lip guides the mud and water initially, causing some to flow outwards and reducing subsequent entry. The remaining mud and water, guided by the first and second guide parts, enters between the first and second labyrinth lips. At this point, the second labyrinth formed by the second labyrinth lip further guides the mud and water. The second guidance process further facilitates the output of some mud and water, ultimately resulting in only a very small amount of mud and water entering the space between the second labyrinth lip and the contact sealing lip, where it is blocked. Simultaneously, the lubricating oil located between the inner and outer rings of the bearing is blocked for the first time by the blocking lip and then blocked a second time by the contact sealing lip. Compared to existing technologies, this invention features a double labyrinth structure. After testing the product, it was determined that this product has a better mud and water guidance effect, further improving sealing performance. Furthermore, the inner and outer sealing components can achieve sealing solely through the tight fit between the contact sealing lip and the sealing cover, resulting in relatively low friction and effectively reducing torque. Attached Figure Description

[0016] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0017] Figure 1 This is a schematic diagram of the overall structure of a double labyrinth single-lip contact hub oil seal according to one embodiment of the present disclosure.

[0018] Figure 2 This is a schematic diagram of the inner and outer sealing components of a double labyrinth single-lip contact hub oil seal according to one embodiment of the present disclosure.

[0019] Figure 3 This is a schematic diagram of the rubber sealing ring structure of a double labyrinth single-lip contact hub oil seal according to one embodiment of the present disclosure.

[0020] The specific labels in the attached figures are as follows:

[0021] 1. Inner sealing assembly; 11. Sealing cap; 12. Rubber guide ring; 13. First guide part; 14. Second guide part;

[0022] 2. External sealing assembly; 21. Support frame; 22. Rubber sealing ring; 23. First labyrinth lip; 24. Second labyrinth lip; 25. Contact sealing lip; 26. Blocking lip. Detailed Implementation

[0023] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” other components or features would subsequently be positioned “above” said other components or features. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0024] Figure 1 This is a schematic diagram of the overall structure of a double labyrinth single-lip contact hub oil seal according to one embodiment of the present disclosure.

[0025] Figure 2 This is a schematic diagram of the inner sealing assembly 1 and the outer sealing assembly 2 of a double labyrinth single-lip contact hub oil seal according to one embodiment of the present disclosure.

[0026] Figure 3 This is a schematic diagram of the structure of the rubber sealing ring 22 of a double labyrinth single-lip contact hub oil seal according to one embodiment of the present disclosure.

[0027] like Figures 1-3 As shown, the double labyrinth single-lip contact hub oil seal disclosed herein may include components such as an inner sealing assembly 1 and an outer sealing assembly 2.

[0028] like Figure 2 As shown in this disclosure, the inner sealing assembly 1 includes a sealing cover 11 fixedly sleeved on the outer side of the inner ring of the bearing. A rubber guide ring 12 is fixedly sleeved on the outer side of the sealing cover 11. The bottom of the rubber guide ring 12 is provided with a first guide portion 13 and a second guide portion 14 from the outside to the inside. The first guide portion 13 is located outside the first labyrinth lip 23, and the second guide portion 14 is located between the first labyrinth lip 23 and the second labyrinth lip 24, so that when the mud and water return, the first guide portion 13 can guide the mud and water that return for the first time, and the second guide portion 14 can guide the mud and water that return for the second time. The rubber guide ring 12, the first guide portion 13 and the second guide portion 14 are integrally formed, and the production of the rubber guide ring 12 can be completed by molding, which reduces the production difficulty.

[0029] like Figure 3 As shown, in a preferred embodiment, the outer sealing assembly 2 includes a support frame 21 fixed to the inner side of the outer ring of the bearing. A rubber sealing ring 22 is sleeved and fixed on the outer side of the support frame 21. The rubber sealing ring 22 is provided with a first labyrinth lip 23, a second labyrinth lip 24 and a contact sealing lip 25 from the outside to the inside. The contact sealing lip 25 is tightly fitted to the outer wall of the sealing cover 11. A blocking lip 26 is provided on the inner side of the rubber sealing ring 22. The blocking lip 26 is inclined downward to effectively block the lubricating oil. An avoidance gap is provided between the blocking lip 26 and the sealing cover 11 to avoid direct contact with the sealing cover 11 and excessive friction. The rubber sealing ring 22, the first labyrinth lip 23, the second labyrinth lip 24, the contact sealing lip 25 and the blocking lip 26 are integrally formed so that the rubber sealing ring 22 can be produced by molding, reducing the production difficulty.

[0030] Therefore, when external mud and water enter through the annular channel between the rubber guide ring 12 and the rubber sealing ring 22, the first labyrinth formed by the first labyrinth lip 23 can guide the mud and water for the first time, causing some of the mud and water to flow outward, thereby reducing the entry of subsequent mud and water. The remaining mud and water, guided by the first guide part 13 and the second guide part 14, enters between the first labyrinth lip 23 and the second labyrinth lip 24. At this time, the second labyrinth formed by the second labyrinth lip 24 guides the mud and water for the second time, thereby causing some of the mud and water to be output again, ultimately leaving only a very small amount. A small amount of mud and water enters between the second labyrinth lip 24 and the contact sealing lip 25 and is blocked by the contact sealing lip 25. At the same time, the lubricating oil located between the inner and outer rings of the bearing is blocked for the first time by the blocking lip 26 and blocked for the second time by the contact sealing lip 25. Compared with the prior art, this utility model has a double labyrinth structure, which has a better mud and water guiding effect and further improves the sealing performance. Meanwhile, the inner sealing component 1 and the outer sealing component 2 can be sealed by the tight fit between the contact sealing lip 25 and the sealing cover 11, resulting in relatively small friction and effectively reducing torque.

[0031] It should also be noted that any content not described in detail in this specification is prior art known to those skilled in the art.

[0032] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A dual-labyrinth single-lip contact hub oil seal characterized by, include: An inner sealing assembly, which is used to cooperate with an outer sealing assembly to form a seal; and An external sealing assembly includes a support frame fixed to the inner side of the outer ring of the bearing. A rubber sealing ring is sleeved and fixed to the outer side of the support frame. The rubber sealing ring is provided with a first labyrinth lip, a second labyrinth lip and a contact sealing lip from the outside to the inside. The contact sealing lip is tightly fitted to the outer wall of the sealing cover.

2. The dual-labyrinth single-lip contact hub oil seal of claim 1, wherein: The inner sealing assembly includes a sealing cover that is fixedly sleeved on the outside of the inner ring of the bearing, and a rubber guide ring is fixedly sleeved on the outside of the sealing cover.

3. The dual-labyrinth single-lip contact hub oil seal of claim 2, wherein: The bottom of the rubber guide ring is provided with a first guide portion and a second guide portion from the outside to the inside. The first guide portion is located outside the first labyrinth lip, and the second guide portion is located between the first labyrinth lip and the second labyrinth lip.

4. The dual-labyrinth single-lip contact hub oil seal of claim 3, wherein: The rubber sealing ring has a blocking lip on its inner side, the blocking lip is inclined downward, and there is a clearance between the blocking lip and the sealing cover.

5. The dual-labyrinth single-lip contact hub oil seal of claim 4, wherein: The rubber guide ring, the first guide part, and the second guide part are integrally formed.

6. The dual-labyrinth single-lip contact hub oil seal of claim 5, wherein: The rubber sealing ring, the first labyrinth lip, the second labyrinth lip, the contact sealing lip, and the blocking lip are integrally formed.

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