Multi-layer labyrinth type low-torque oil seal

Abstract

The utility model discloses a multi-layer labyrinth type low-torque oil seal which comprises a first framework and a second framework, the first framework is connected with a first rubber body, and the second framework is connected with a second rubber body. The first rubber body is sequentially provided with a static sealing wavy line, a mud blocking point, a labyrinth protruding point, a labyrinth lip, a muddy water lip and a grease lip from one end to the other end.

Description

Technical Field

[0001] The utility model relates to the technical field of oil seals, in particular to a multi-layer labyrinth type low torque oil seal. Background Art

[0002] During use, as the sealing lip wears, the radial pressure of the oil seal will decrease, thereby reducing the performance of the oil seal. With the development of fuel-efficient vehicles and new energy vehicles, people have begun to pay attention to energy conservation and emission reduction and the cruising range of new energy. On the basis of the normal sealing effect guaranteed by traditional oil seals, they have begun to pursue low friction torque; the friction torque of the oil seal is small, the energy loss of the vehicle is small, and the fuel economy and the cruising range of new energy are further optimized and improved. Therefore, the design of a reasonable oil seal structure and the reduction of the friction torque of the oil seal play a key role in the quality and life of the hub unit. Summary of the invention

[0003] The purpose of the present application is to provide a multi-layer labyrinth low-torque oil seal.

[0004] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a multi-layer labyrinth low-torque oil seal, comprising a first skeleton and a second skeleton, the first skeleton being connected to a first rubber body, the second skeleton being connected to a second rubber body, the first rubber body having a static sealing wave line, a mud retaining point, a labyrinth convex point, a labyrinth lip, a mud and water lip and a grease lip from one end to the other.

[0005] The second rubber body is provided with a static sealing convex point.

[0006] The second rubber body is a magnetic rubber body.

[0007] The shape of the labyrinth lip is L-shaped.

[0008] The mud lip and the grease lip are both arranged obliquely, and an obtuse angle is formed between the two.

[0009] In summary, the technical effects and advantages of the utility model are:

[0010] The utility model adopts a labyrinth convex point, a second rubber body and a labyrinth lip to form a multi-layer labyrinth structure, which effectively reduces the intrusion of mud and water, and at the same time uses the rotating centrifugal force to discharge the trace amount of mud and water that enters. The combination of mud and water lips, static sealing convex points and static sealing wavy lines more effectively prevents the intrusion of mud and water. Compared with traditional oil seals, the number of lip openings is reduced and the torque is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below.

[0012] Figure 1Schematic plan view of the present utility model;

[0013] In the figure: 1. First skeleton; 2. First rubber body; 2a. Static seal wave; 2b. Mudguard point; 2c. Labyrinth bump; 2d. Labyrinth lip; 2e. Mud and water lip; 2f. Grease lip; 3. Skeleton; 4. Second rubber body; 4a. Static seal bump. Specific embodiments

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0015] As Figure 1 shown, this multi-layer labyrinth low-torque oil seal includes a first skeleton 1 and a second skeleton 3. A first rubber body 2 is connected to the first skeleton 1, and a second rubber body 4 is connected to the second skeleton 3. The first rubber body 2 sequentially has a static seal wave 2a, a mudguard point 2b, a labyrinth bump 2c, a labyrinth lip 2d, a mud and water lip 2e, and a grease lip 2f from one end to the other end; adopting this structure, the labyrinth bump 2c is a part of the overall labyrinth; the labyrinth lip 2d is a non-contact lip, and forms a tortuous labyrinth form with the structure of the second rubber body 4 to prevent mud and water from invading; the mud and water lip 2e is in interference contact to prevent mud and water from invading; the grease lip 2f is to prevent the grease inside the bearing from leaking; the static seal wave 2a is to strengthen the seal and prevent mud and water from invading; the static seal bump 4a is in interference contact to prevent mud and water from invading.

[0016] The second rubber body 4 has a static seal bump 4a.

[0017] The second rubber body 4 is a magnetic rubber body.

[0018] The shape of the labyrinth lip 2d is L-shaped.

[0019] Both the mud and water lip 2e and the grease lip 2f are inclined, and an obtuse angle is formed between the two.

[0020] In summary, through a multi-layer labyrinth structure, while meeting the light torque, the sealing performance of the product is also met.

[0021] The present utility model combines a labyrinth structure to meet both the light torque and the sealing performance of the product, effectively reducing the friction torque, with small vehicle energy loss, and further optimizing and improving the fuel economy and new energy endurance mileage.

[0022] The above components are all common standard parts or parts known to those skilled in the art, and their structures and principles can all be known by those skilled in the art through technical manuals or through conventional experimental methods.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Multi-layer labyrinth low-torque oil seal, comprising a first skeleton (1) and a second skeleton (3), a first rubber body (2) is connected to the first skeleton (1), and a second rubber body (4) is connected to the second skeleton (3), characterized in that, The first rubber body (2) sequentially has a static seal wavy line (2a), a mudguard point (2b), a labyrinth bump (2c), a labyrinth lip (2d), a muddy water lip (2e), and a grease lip (2f) from one end to the other end.

2. The multi-layer labyrinth low-torque oil seal according to claim 1, wherein The second rubber body (4) has a static seal bump (4a).

3. The multi-layer labyrinth low-torque oil seal according to claim 1, wherein The second rubber body (4) is a magnetic rubber body.

4. The multi-layer labyrinth low-torque oil seal according to claim 1, characterized in that, The shape of the labyrinth lip (2d) is L-shaped.

5. The multi-layer labyrinth low-torque oil seal according to claim 1, characterized in that, Both the muddy water lip (2e) and the grease lip (2f) are inclinedly arranged, and an obtuse angle is formed between the two.

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