Labyrinth combined type low-torque sealing structure

Abstract

The utility model relates to the field of bearing sealing structures, and discloses a labyrinth combined type low-torque sealing structure, a sealing ring on one side is mounted on an outer ring, a sealing ring on the other side is mounted on an inner ring, 2-3 lips form a labyrinth type non-contact structure, and meanwhile, grooves are formed in the lips and used for weakening the impact force of muddy water and protecting the sealing performance of the contact lips. 2-3 lips on the lower portion are of a contact type structure, the widths of the lips are optimized and reduced, and the rotating torque is reduced while the sealing performance is guaranteed; and the rotating torque of the sealing ring can be reduced by about 50%, so that the low-torque hub bearing unit has higher market competitiveness.

Description

Technical Field

[0001] The utility model relates to the field of bearing sealing structures, in particular to a labyrinth combined low-torque sealing structure. Background Art

[0002] As users' demands for the mileage of new energy vehicles are getting higher and higher, the requirement to reduce the energy consumption of the whole vehicle needs to be addressed urgently. As a key component of the automobile, the friction loss of the wheel hub bearing accounts for 3% to 5% of that of new energy vehicles. According to the structural characteristics of the wheel hub bearing itself, the three main factors affecting its own friction loss are the sealing ring structure, the internal structure of the bearing groove, and the grease. Among them, the sealing structure is the main reason affecting the friction loss of the bearing. The loss characteristics of the wheel hub bearing are usually evaluated by the rotational torque. At the outer end close to the bearing, the conventional design is to use a single three-lip seal structure, which can ensure the sealing performance of the bearing, but the rotational torque is generally large. Utility Model Content

[0003] The utility model aims to provide a labyrinth combined low-torque sealing structure to solve the problem in the prior art that the wheel hub bearing sealing ring structure of new energy vehicles adopts a single three-lip sealing structure and the rotation torque is generally too large.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a labyrinth combined low-torque sealing structure, including a sealing ring 1 and a sealing ring 2 used side by side, each of the sealing ring 1 and the sealing ring 2 is provided with at least one non-contact lip located between the two, and multiple non-contact sealing lips are staggered to form a labyrinth structure, and multiple side-by-side contact lips are provided on the sealing ring 1 on the inner side of the labyrinth structure, and the contact lips are in contact with the sealing ring 2.

[0005] Preferably, as an improvement, a buffer groove is provided on the non-contact lip.

[0006] Preferably, as an improvement, two or three contact lips are arranged side by side.

[0007] Preferably, as an improvement, the contact lip is arranged to be inclined toward the non-contact lip.

[0008] Preferably, as an improvement, the outer edge of the sealing ring 1 is buckled and covered on the outer side of the outer edge of the sealing ring 2.

[0009] The principles and advantages of this solution are: in actual application, sealing ring 1 is installed on the outer ring of the wheel hub bearing, and sealing ring 2 is installed on the inner ring of the wheel hub bearing. A sealing gap is formed between sealing ring 1 and sealing ring 2. The non-contact lips are staggered in the sealing gap to form a maze structure. The buffer grooves on the non-contact lips weaken the impact of mud and water entering the sealing gap, thereby protecting the sealing performance of the lip. The inner contact lip further improves the sealing performance and optimizes and reduces the width of the lip, thereby ensuring the sealing performance while reducing the rotational torque. The rotational torque of the sealing structure can be reduced by about 50%, thereby improving the sealing performance of the low-torque wheel hub bearing unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the single-side cross-sectional structure of Example 1 of the utility model.

[0011] Figure 2 This is a schematic diagram of a single-side cross-sectional structure of Example 1 of the utility model applied to a wheel hub bearing.

[0012] Figure 3 This is a schematic diagram of the single-side cross-sectional structure of Example 2 of the utility model. DETAILED DESCRIPTION

[0013] The following is further described in detail through specific implementation methods:

[0014] The reference numerals in the drawings of the specification include: sealing ring 1 1, sealing ring 2 2, non-contact lip 3, buffer groove 4, contact lip 5, groove 6, outer ring 7, inner ring 8.

[0015] Embodiment 1, basically as attached Figure 1 As shown: a labyrinth combined low torque sealing structure, including a sealing ring 1 and a sealing ring 2 used side by side, the outer edge of the sealing ring 1 is buckled and covered on the outer side of the outer edge of the sealing ring 2. A non-contact lip 3 located between the sealing ring 1 and the sealing ring 2 is integrally formed, and the two non-contact sealing lips are staggered to form a labyrinth structure, each non-contact lip 3 is provided with a buffer groove 4 with an opening toward the outside of the sealing ring, and two side-by-side grooves 6 are provided on the bottom of the buffer groove 4 and the outer side wall of the sealing ring 2. Three side-by-side contact lips 5 are integrally formed on the sealing ring 1 inside the labyrinth structure, and the contact lips 5 are inclined toward the non-contact lips 3, and the contact lips 5 abut against the sealing ring 2.

[0016] Embodiment 2, basically as attached Figure 3As shown: a labyrinth combined low torque sealing structure, including a sealing ring 1 and a sealing ring 2 used side by side, the outer edge of the sealing ring 1 is buckled and covered on the outer side of the outer edge of the sealing ring 2. A non-contact lip 3 located between the sealing ring 1 and the sealing ring 2 is integrally formed, and the two non-contact sealing lips are staggered to form a labyrinth structure, and each non-contact lip 3 is provided with a buffer groove 4 with an opening facing the outside of the sealing ring. Two side-by-side contact lips 5 are integrally formed on the sealing ring 1 inside the labyrinth structure, and the contact lip 5 is inclined toward the non-contact lip 3, and the contact lip 5 abuts against the sealing ring 2.

[0017] The specific implementation process is as follows: Figure 2 As shown, sealing ring 1 is installed on the outer ring 7 of the wheel hub bearing, and sealing ring 2 is installed on the inner ring 8 of the wheel hub bearing. A sealing gap is formed between sealing ring 1 and sealing ring 2. The non-contact lips 3 are staggered in the sealing gap to form a maze structure. The buffer grooves 4 on the non-contact lips 3 weaken the impact of mud and water entering the sealing gap, thereby protecting the sealing performance of the lip. The inner contact lip 5 further improves the sealing performance and optimizes and reduces the width of the lip, thereby ensuring the sealing performance while reducing the rotational torque. The rotational torque of the sealing structure can be reduced by about 50%, thereby improving the sealing performance of the low-torque wheel hub bearing unit.

[0018] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Labyrinth combined low torque sealing structure, characterized by: It comprises a sealing ring 1 and a sealing ring 2 used side by side, each of which is provided with at least one non-contact lip located between the two, and a plurality of non-contact sealing lips are staggered to form a labyrinth structure, and a plurality of side-by-side contact lips are provided on the sealing ring 1 on the inner side of the labyrinth structure, and the contact lips are in contact with the sealing ring 2; a buffer groove is provided on the non-contact lip.

2. The labyrinth combined low torque sealing structure according to claim 1, characterized in that: The contact lips are arranged two or three side by side.

3. The labyrinth combined low torque sealing structure according to claim 1, characterized in that: The contact lip is arranged to be inclined toward the non-contact lip.

4. The labyrinth combined low torque sealing structure according to claim 1, characterized in that: The outer edge of the sealing ring 1 is buckled and covered on the outer side of the outer edge of the sealing ring 2.

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