Muddy water prevention oil seal

Abstract

The utility model relates to a muddy water prevention oil seal, and relates to the technical field of sealing elements, the muddy water prevention oil seal comprises an annular rubber main body, one side of the rubber main body is provided with a receding notch, a framework is embedded in the inner wall of the receding notch of the rubber main body, and the part, facing the axis of the rubber main body, of the rubber main body is a main lip; an auxiliary lip made of PTFE is fixedly arranged on the inner edge of the side face, away from the receding notch, of the rubber body, and the auxiliary lip can be bent and abut against the peripheral face of the corresponding shaft. According to the oil seal, when the corresponding shaft is sleeved with the oil seal, at the moment, the side face, facing the axis, of the main lip is attached to the outer side face of the shaft, meanwhile, the auxiliary lip can be bent and abut against the peripheral face of the corresponding shaft, and the auxiliary lip is tightly attached to the peripheral face of the corresponding shaft, so that the possibility of oil leakage and muddy water permeation is reduced, and the normal lubricating effect of equipment is guaranteed; due to the fact that the auxiliary lip is made of the PTFE material and has good non-adhesion, the material has the minimum surface tension in solid materials and does not adhere to any substance, and the possibility that muddy water adheres to the surface of the auxiliary lip is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of seals, and in particular to a mud and water proof oil seal. Background Art

[0002] In mechanical engineering, oil seals are the core sealing components of rotating shafts and reciprocating parts, and their importance is self-evident. They not only effectively isolate lubricating oil or grease to prevent leakage, ensuring the smooth operation and efficient lubrication of the mechanical system, but also avoid potential pollution to the environment by reducing leakage. Therefore, the performance stability and durability of oil seals directly determine the overall performance and long-term service capacity of mechanical equipment.

[0003] There are various oil seal designs on the market. Among them, the utility model patent with publication number CN212839393U proposes a durable crankshaft oil seal, which innovatively integrates the reinforced rubber body structure embedded in the skeleton and adopts a double sealing design of the main lip and the dust lip. In particular, the main lip part is carefully designed with a groove between the first lip and the second lip, aiming to further improve the tightness of the seal and the durability of the oil seal.

[0004] However, when we apply this oil seal to the shaft system of new energy vehicles and face the severe challenge of muddy roads, problems emerge. When new energy vehicles are driving on muddy roads, the oil seal will inevitably be frequently splashed by mud and water. Although the dust lip is made of rubber material and has a certain dustproof function, its protective effect is inadequate when facing a mixture of mud and water. The penetration ability of mud and water is far greater than that of simple dust, and it can easily penetrate the defense line of the dust lip and then invade the tiny gap between the oil seal and the shaft. This penetration not only destroys the sealing integrity of the oil seal, causing the leakage of lubricating oil or grease, but also directly reduces the amount of oil available for lubrication, affecting the normal lubrication effect of the equipment, and may even cause environmental pollution problems. Utility Model Content

[0005] The purpose of the present application is to provide a mud and water proof oil seal to solve the problem that the dust lip on the above oil seal has poor mud and water proof performance.

[0006] The present application provides a mud and water proof oil seal adopting the following technical solution:

[0007] A mud and water proof oil seal comprises an annular rubber body, one side of the rubber body is provided with a clearance notch, the inner wall of the rubber body is embedded with a frame, the part of the rubber body facing its own axis is a main lip; the inner edge of the side of the rubber body away from the clearance notch is fixed with a secondary lip made of PTFE, the secondary lip can be bent and abut against the outer peripheral surface of the corresponding shaft.

[0008] By adopting the above technical solution, when the oil seal is sleeved on the corresponding shaft, the side of the main lip facing the axis is in contact with the outer side of the shaft. At the same time, the secondary lip can be bent and abuts against and closely adheres to the outer peripheral surface of the corresponding shaft, thereby reducing the possibility of oil leakage and mud and water penetration and ensuring the normal lubrication effect of the equipment.

[0009] Optionally, an installation ring groove for inserting and fixing the outer edge of the secondary lip is provided on the inner edge of the side of the rubber main body away from the relief notch.

[0010] By adopting the above technical solution, due to the setting of the installation ring groove, the secondary lip can be fixed in the installation ring groove on the rubber main body, thereby effectively preventing the secondary lip from loosening or displacing during use through physical limitation and reducing the possibility of the fixed secondary lip becoming loose.

[0011] Optionally, oil return lines are evenly distributed on the inner wall of the main lip.

[0012] By adopting the above technical solution, the design of the oil return lines enables the lubricating oil flowing into the lip part during the operation of the oil seal to be pumped back to one side of the oil seal in time, thereby reducing the loss of lubricating oil.

[0013] Optionally, a tightening spring in a stretched state is provided on the side of the rubber main body, and a limit ring groove for inserting the tightening spring is provided on the inner wall of the relief notch near the axis of the rubber main body itself.

[0014] By adopting the above technical solution, the tightening elastic body tightens and then squeezes the main lip, making the main lip closely adhere to the outer side of the corresponding shaft, thereby reducing the possibility of oil leakage and also reducing the possibility of external mud and water seeping in.

[0015] Optionally, an abutting ring is fixedly provided on the edge of the side of the rubber main body near its own axis and away from the relief notch, and the abutting ring is bent towards the direction close to the relief notch.

[0016] By adopting the above technical solution, after the oil seal is sleeved on the corresponding shaft, one side of the abutting ring abuts tightly against the outer peripheral surface of the corresponding shaft, improving its anti-mud and dust performance.

[0017] Optionally, a guiding arc surface is provided on the side of the abutting ring close to the relief notch.

[0018] By adopting the above technical solution, during the sleeving and installation process of the oil seal, the abutting ring can be sleeved on the outer periphery of the shaft along the guiding arc surface, thereby facilitating the installation and application of the oil seal.

[0019] Optionally, a limiting spring is provided on the side of the rubber main body, and a positioning card slot for sleeving and inserting the limiting spring is provided on the side of the abutting ring away from its own axis.

[0020] By adopting the above technical solution, after the oil seal sleeve is installed on the corresponding shaft, the limit spring in the tightened state presses the abutment ring tightly, so that one side of the abutment ring presses against the outer peripheral surface of the corresponding shaft, further improving its mud and water proof and dust proof performance.

[0021] Optionally, a plurality of anti-slip grooves are fixedly provided on the outer surface of the rubber body.

[0022] By adopting the above technical solution, when the user sets the oil seal sleeve on the corresponding shaft, the fingers contact the anti-slip grooves on the rubber body, so that it is convenient for the user to hold the oil seal.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the oil seal sleeve is installed on the corresponding shaft, the side of the main lip facing the axis fits with the outer side of the shaft, and the auxiliary lip can be bent and abut against and fit tightly with the outer peripheral surface of the corresponding shaft, thereby reducing the possibility of oil leakage and muddy water penetration and ensuring the normal lubrication effect of the equipment; since the auxiliary lip is made of PTFE material, it has good non-stick properties. This material has the smallest surface tension among solid materials and does not adhere to any substance, thereby reducing the possibility of muddy water adhering to the surface of the auxiliary lip. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a schematic diagram of the overall cross-sectional structure of Example 1 of the present application;

[0027] Figure 2 It is a partial cross-sectional structural schematic diagram of the installation and matching of the auxiliary lip and the rubber body in Example 1 of the present application;

[0028] Figure 3 It is a partial cross-sectional structural schematic diagram of the installation and cooperation of the abutment ring in Example 2 of the present application;

[0029] Figure 4 yes Figure 3 Enlarged schematic diagram of part A.

[0030] In the figure, 1. rubber body; 11. clearance notch; 111. limiting ring groove; 12. main lip; 13. mounting ring groove; 14. oil return line; 15. anti-slip pattern; 16. abutment ring; 161. guide arc surface; 162. positioning slot; 2. frame; 3. auxiliary lip; 4. tightening spring; 5. limiting spring. Detailed implementation mode

[0031] The present application will be further described in detail below in conjunction with all the accompanying drawings.

[0032] Example 1:

[0033] Referring to Figure 1 and Figure 2 , a muddy water-proof oil seal includes an annular rubber main body 1. A relief notch 11 is provided on one side of the rubber main body 1. A skeleton 2 is fixedly embedded on the inner wall of the relief notch 11 of the rubber main body 1. The part of the rubber main body 1 facing its own axis is the main lip 12;

[0034] A secondary lip 3 is provided on the side surface of the rubber main body 1, and the secondary lip 3 is made of PTFE material; an installation ring groove 13 for placing and fixing the outer edge of the secondary lip 3 is provided on the inner edge of the side surface of the rubber main body 1 away from the relief notch 11. The secondary lip 3 is fixedly installed on the inner wall of the installation ring groove 13 by glue;

[0035] When the oil seal is sleeved on the corresponding shaft, at this time the secondary lip 3 can be bent (along the bending arrow direction in the figure) and abuts against the outer peripheral surface of the corresponding shaft; since the secondary lip 3 is made of PTFE material and has good non-adhesiveness, this material has the smallest surface tension among solid materials and does not adhere to any substances, thereby reducing the possibility of muddy water adhering to the surface of the secondary lip 3.

[0036] Referring to Figure 2 , a number of "eight-character" oil return lines 14 are evenly distributed on the inner side wall of the main lip 12 facing its own axis, further reducing the possibility of oil leakage and improving the sealing performance of the oil seal. A tightening spring 4 in a stretched state is provided on the side surface of the rubber main body 1. At the same time, a limiting ring groove 111 for placing the tightening spring 4 is provided on the inner wall of the relief notch 11 of the rubber main body 1 close to its own axis, so that the main lip 12 is closely attached to the outer side surface of the corresponding shaft, reducing the possibility of oil leakage.

[0037] Referring to Figure 2 , a number of anti-slip lines 15 are fixedly provided on the outer side surface of the rubber main body 1; when the user sleeved the oil seal on the corresponding shaft, the fingers contact the anti-slip lines 15 on the rubber main body 1, so as to facilitate the user to hold the oil seal.

[0038] The implementation principle of the embodiment of the present application is:

[0039] When the oil seal sleeve is arranged on the corresponding shaft, the user's fingers come into contact with the anti-slip grooves 15 on the rubber body 1, and the auxiliary lip 3 can be bent and abut against the outer peripheral surface of the corresponding shaft, and at the same time, the elasticity is tightened and then the main lip 12 is squeezed, so that the main lip 12 is tightly fitted with the outer side surface of the corresponding shaft; and because the auxiliary lip 3 is made of PTFE material, it has good non-stick properties. This material has the smallest surface tension among solid materials and does not adhere to any substance, thereby reducing the possibility of mud and water adhering to the surface of the auxiliary lip 3.

[0040] Embodiment 2:

[0041] Reference Figure 3 and Figure 4 The difference between the embodiment of the present application and the embodiment 1 is that an abutment ring 16 is integrally formed on the side of the rubber body 1 close to its own axis and at the edge away from the clearance notch 11, wherein the abutment ring 16 is bent in a direction close to the clearance notch 11, and a guide arc surface 161 is provided on the side of the abutment ring 16 close to the clearance notch 11;

[0042] A limit spring 5 is provided on the side of the rubber body 1, and a positioning groove 162 for the limit spring 5 to be inserted into is opened on the side of the abutment ring 16 away from its own axis; when the oil seal is mounted on the corresponding shaft, the limit spring 5 in the tightened state presses against the abutment ring 16, so that one side of the abutment ring 16 is pressed against the outer peripheral surface of the corresponding shaft, further improving its mud and water proof and dust proof performance.

[0043] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A mud and water proof oil seal, comprising an annular rubber body (1), a clearance notch (11) being provided on one side of the rubber body (1), a frame (2) being embedded on the inner wall of the clearance notch (11) of the rubber body (1), and a portion of the rubber body (1) facing its own axis being a main lip (12); It is characterized in that An auxiliary lip (3) made of PTFE material is fixedly provided on the inner edge of the side of the rubber body (1) away from the clearance notch (11); the auxiliary lip (3) can be bent and abut against the outer peripheral surface of the corresponding shaft.

2. The anti-mud and water oil seal according to claim 1, characterized in that: The inner edge of the side surface of the rubber body (1) away from the clearance notch (11) is provided with a mounting ring groove (13) for the outer edge of the auxiliary lip (3) to be placed and fixed.

3. The anti-mud and water oil seal according to claim 1, characterized in that: Oil return lines (14) are evenly distributed on the inner wall of the main lip (12).

4. The anti-mud and water oil seal according to claim 1, characterized in that: A tightening spring (4) in a stretched state is provided on the side of the rubber body (1), and a limiting ring groove (111) for the tightening spring (4) to be placed is provided on the inner wall of a clearance notch (11) close to the axis of the rubber body (1).

5. The anti-mud and water oil seal according to claim 1, characterized in that: A contact ring (16) is fixedly provided on the side surface of the rubber body (1) close to its own axis at an edge away from the clearance notch (11), and the contact ring (16) is bent in a direction close to the clearance notch (11).

6. The anti-mud and water oil seal according to claim 5, characterized in that: A guiding arc surface (161) is provided on the side surface of the abutment ring (16) close to the clearance notch (11).

7. The anti-mud and water oil seal according to claim 5, characterized in that: A limit spring (5) is provided on the side of the rubber body (1), and a positioning slot (162) for the limit spring (5) to be sleeved is provided on the side of the abutment ring (16) away from its own axis.

8. The anti-mud and water oil seal according to claim 1, characterized in that: A plurality of anti-slip grooves (15) are fixedly arranged on the outer side surface of the rubber body (1).

Images