Combined oil seal with exhaust hole

Abstract

The utility model discloses a combined oil seal with a vent hole, which comprises a framework, a rubber body is arranged on the framework, the combined oil seal further comprises a check ring matched with the rubber body, the cross section of the framework and the cross section of the check ring are both in an L shape, and a static sealing point, a first muddy water lip, a second muddy water lip and a grease lip are sequentially arranged on the rubber body. The first muddy water lip and the second muddy water lip are parallel to each other and are obliquely arranged outwards, and the outer end of the first muddy water lip and the outer end of the second muddy water lip make contact with one end of the check ring. The grease lip is obliquely arranged inwards, the outer end of the grease lip is further in contact with the other end of the check ring, and an exhaust hole is formed in the grease lip.

Description

Technical Field

[0001] This utility model belongs to the field of oil seal technology and relates to a combined oil seal with a vent hole. Background Technology

[0002] A combination oil seal is a sealing device used in mechanical equipment to prevent lubricating oil leakage or the intrusion of external contaminants. It typically consists of multiple sealing rings, which can be made of rubber, plastic, or other synthetic materials to suit different working environments and requirements. Combination oil seals are designed to provide double or multiple layers of protection, ensuring that mechanical components remain well lubricated during operation, while avoiding resource waste and environmental pollution caused by oil leakage.

[0003] However, under current technological conditions, some problems have been identified, particularly in certain specific operating environments. When the combined oil seal encounters high internal pressure at the bearing, a worrying issue may arise: grease leakage. Therefore, designing a combined oil seal with a vent hole to address this problem is particularly necessary. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a combined oil seal with a vent hole.

[0005] To achieve the above objectives, the technical solution of this utility model is: a combined oil seal with a vent hole, comprising a skeleton, a rubber body on the skeleton, and a retaining ring that mates with the rubber body. The skeleton and the retaining ring have L-shaped cross-sections. The rubber body sequentially comprises a static sealing point, a first mud / water lip, a second mud / water lip, and a grease lip. The first and second mud / water lips are parallel to each other and both are inclined outwards. The outer ends of the first and second mud / water lips are in contact with one end of the retaining ring. The grease lip is inclined inwards, and its outer end is also in contact with the other end of the retaining ring. The grease lip is provided with a vent hole.

[0006] The number of exhaust ports is two.

[0007] The length of the first mud lip is greater than the length of the second mud lip.

[0008] The other end of the frame also has a bent portion.

[0009] The mud-water lip one, mud-water lip two, and grease lip are all arranged at the bend, and the static sealing point is arranged at one end of the skeleton.

[0010] By adopting the above technical solution, the beneficial effects of this utility model are:

[0011] This invention effectively prevents grease leakage caused by excessive internal pressure in the bearing by adding an exhaust hole to the grease lip. At the same time, the use of two sets of mud and water lips, one long and one short, can effectively prevent the intrusion of mud and water. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] In the diagram, 1a is the skeleton; 1a1 is the bend; 1b is the rubber body; 1c is the mud-water lip one; 1d is the mud-water lip two; 1e is the grease lip; 1f is the vent hole; 1g is the static sealing point; and 2a is the retaining ring. Detailed Implementation

[0014] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0015] like Figure 1 As shown, this combined oil seal with a vent hole includes a skeleton 1a, a rubber body 1b on the skeleton 1a, and a retaining ring 2a that mates with the rubber body 1b. The retaining ring 2a mates with the lip of the rubber body 1b and provides a sealing function. The cross-sections of the skeleton 1a and the retaining ring 2a are both L-shaped. The rubber body 1b has a static sealing point 1g, a mud lip 1c, a mud lip 2d, and a grease lip 1e in sequence. The grease lip 1e can prevent grease leakage inside the bearing. The mud lip 1c and the mud lip 2d are parallel to each other and are both inclined outwards. The outer ends of the mud lip 1c and the mud lip 2d are in contact with one end of the retaining ring 2a. The grease lip 1e is inclined inwards, and the outer end of the grease lip 1e is also in contact with the other end of the retaining ring 2a. The grease lip 1e is provided with a vent hole 1f.

[0016] There are two exhaust holes 1f, specifically: two exhaust holes 1f are equally divided on its circumference.

[0017] The length of mud-water lip 1c is greater than the length of mud-water lip 2d. Both mud-water lip 1c and mud-water lip 2d are in interference contact to prevent mud and water from entering.

[0018] The other end of the skeleton 1a also has a bent portion 1a1.

[0019] Mud and water lip 1c, mud and water lip 2d and grease lip 1e are all arranged at the bend 1a1, and static sealing point 1g is arranged at one end of the skeleton 1a.

[0020] In summary, by opening an exhaust port 1f on the inner diameter lip, grease leakage caused by excessive internal pressure in the bearing can be prevented.

[0021] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0022] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A combined oil seal with a vent hole, comprising a skeleton (1a) having a rubber body (1b) thereon, and a retaining ring (2a) that mates with the rubber body (1b), characterized in that, The cross-sections of the skeleton (1a) and the retaining ring (2a) are both L-shaped. The rubber body (1b) has a static sealing point (1g), a mud lip one (1c), a mud lip two (1d), and a grease lip (1e) in sequence. The mud lip one (1c) and the mud lip two (1d) are parallel to each other and are both inclined outwards. The outer ends of the mud lip one (1c) and the mud lip two (1d) are in contact with one end of the retaining ring (2a). The grease lip (1e) is inclined inwards. The outer end of the grease lip (1e) is also in contact with the other end of the retaining ring (2a). The grease lip (1e) is provided with an exhaust hole (1f).

2. The combined oil seal with a vent hole according to claim 1, characterized in that, The number of exhaust ports (1f) is two.

3. A combined oil seal with a vent hole according to claim 1, characterized in that, The length of the first mud lip (1c) is greater than the length of the second mud lip (1d).

4. A combined oil seal with a vent hole according to claim 1, characterized in that, The other end of the skeleton (1a) also has a bent portion (1a1).

5. A combined oil seal with a vent hole according to claim 4, characterized in that, The mud-water lip one (1c), mud-water lip two (1d) and grease lip (1e) are all arranged at the bend (1a1), and the static sealing point (1g) is arranged at the end of one end of the skeleton (1a).

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