Sleeve type protective sealing element

Abstract

The utility model relates to the technical field of oil seal sealing, in particular to a sleeve type protective sealing element which comprises a sleeve, an inner framework is arranged on the sleeve, an outer ring frame is sleeved outside the sleeve, an outer framework and an auxiliary framework are arranged in the outer ring frame, the outer framework is sleeved outside the auxiliary framework, and the outer side wall of the auxiliary framework is in contact with the inner side wall of the outer framework. The auxiliary framework comprises two connected branch frameworks, a side lip in interference fit with the sleeve is arranged on the inner side wall of the outer ring frame, a main lip and an auxiliary lip which are connected with the outer ring frame are arranged on the two sides of the side lip respectively, the cross section of the auxiliary lip and the cross section of the side lip are in a splayed shape, and the middles of the opposite sides of the auxiliary lip and the side lip make contact with the two branch frameworks in a one-to-one mode respectively. The three structures of the main lip, the auxiliary lip and the side lip act at the same time and are matched with one another to achieve the sealing effect, the protection performance is improved, a sealing piece is prevented from being damaged due to high-pressure failure, and the possibility of oil leakage is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil seal sealing technical field especially relates to a sleeve type protective sealing element. BACKGROUND

[0002] Oil seal is the mechanical element that is used to seal oil (oil is the most common liquid material in transmission system, also refers to general liquid material), it separates the part that needs lubrication in transmission part and output part, so as to prevent lubricating oil from leaking.

[0003] For example, a patent with publication number CN107606167A and the name of a rotary oil seal was published on January 19, 2018, which includes a main oil seal framework, a main oil seal elastomer, a vice oil seal framework and a vice oil seal elastomer, a main lip and a vice lip are arranged on the main oil seal elastomer, a semi-annular lip is arranged on the vice oil seal elastomer, and the main oil seal is used in cooperation with the vice oil seal; a spring is arranged in the back groove of the main lip, and the surface of the main lip is a sine curve; the patent keeps the oil seal lip in good lubrication and prolongs the service life; however, the applicant finds that the oil seal has the possibility of oil leakage when it encounters high pressure. SUMMARY

[0004] Therefore, the utility model aims at providing a sleeve type protective sealing element to solve the problem of the possibility of oil leakage under high pressure.

[0005] In order to achieve the above purpose, the utility model provides a sleeve type protective sealing element, which comprises a sleeve, an inner framework is arranged on the sleeve, an outer ring frame is arranged outside the sleeve, an outer framework and a vice framework are arranged in the outer ring frame, the outer framework is arranged outside the vice framework, the outer wall of the vice framework is in contact with the inner wall of the outer framework, the vice framework comprises two connected branch frameworks, a side lip in interference fit with the sleeve is arranged on the inner wall of the outer ring frame, a main lip and a vice lip connected with the outer ring frame are arranged on both sides of the side lip, the cross section of the vice lip and the side lip is in the shape of an eight character, and the middle part of the side opposite to the vice lip is in contact with the two branch frameworks respectively.

[0006] Optionally, rubber sleeves are arranged outside the two branch frameworks.

[0007] Optionally, the cross section of the outer framework is in the shape of an inverted L, and the outer framework comprises an outer shaft ring arranged in the axial direction and an outer diameter ring arranged in the radial direction and connected with the outer shaft ring.

[0008] Optionally, the vice framework comprises a connecting framework connecting the two branch frameworks, and the two branch frameworks are in contact with the outer framework through the connecting framework, and the cross section of the vice framework is in the shape of an inverted U.

[0009] Optionally, the outer frame is fixedly connected with the auxiliary frame, and the outer frame and the auxiliary frame are integrally formed.

[0010] Optionally, an annular spring is arranged outside the main lip, and the spring expands inward to keep the main lip on the outer frame in abutment with the sleeve.

[0011] Optionally, the inner frame is arranged on the outer circumference of the sleeve, and the inner frame is a cylindrical type, and the main lip is kept in abutment with the inner frame arranged outside the sleeve.

[0012] The sleeve type protective sealing element has the advantages that the main lip, the auxiliary lip and the side lip simultaneously act and cooperate with each other to achieve the sealing effect, so that the lubricating oil is prevented from leaking, when the sealing element encounters high pressure, the outer frame in the sealing element slightly deforms according to the pressure, the outer frame slightly inclines to press the auxiliary frame slightly, the auxiliary frame on the auxiliary lip is pressed, the sealing between the sleeve and the outer frame is improved, the protective performance is improved, the sealing element is prevented from being damaged due to high pressure, the auxiliary lip prevents the impurities from entering the inside and outside, the lip is effectively prevented from being polluted, and the possibility of oil leakage of the sealing element is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only illustrate the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0014] Figure 1 The figure is a structural schematic view of the present application.

[0015] In the figure, 1 is a sleeve, 2 is an inner frame, 3 is an outer frame, 4 is an outer frame, 5 is an auxiliary frame, 6 is a main lip, 7 is an auxiliary lip, 8 is a side lip, and 9 is a spring. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will further illustrate the present application in combination with specific embodiments and with reference to the drawings.

[0017] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" 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.

[0018] like Figure 1 As shown, a sleeve-type protective seal includes a sleeve 1, an inner skeleton 2 on the sleeve 1, an outer ring frame 3 on the sleeve 1, an outer skeleton 4 and a secondary skeleton 5 inside the outer ring frame 3, the outer skeleton 4 being fitted over the outer side of the secondary skeleton 5, the outer side wall of the secondary skeleton 5 contacting the inner side wall of the outer skeleton 4, the secondary skeleton 5 including two connected support skeletons, a side lip 8 with an interference fit to the sleeve 1 on the inner side wall of the outer ring frame 3, a main lip 6 and a secondary lip 7 connected to the outer ring frame 3 on both sides of the side lip 8, the cross-section of the secondary lip 7 and the side lip 8 being V-shaped, the ends of the two support skeletons facing the sleeve 1 respectively contacting the middle of the secondary lip 7 and the middle of the side lip 8, the middle parts of the opposite sides of the secondary lip 7 and the side lip 8 respectively contacting the two support skeletons one by one.

[0019] When the seal is in operation, the main lip 6, the secondary lip 7, and the side lip 8 work together to achieve a sealing effect and prevent lubricating oil leakage. When the seal encounters high pressure, the outer ring frame 3 inside the seal will deform slightly according to the pressure. The outer frame 4 tilts slightly and squeezes the secondary frame 5, causing the upper support frame of the secondary frame 5 to squeeze the secondary lip 7, improving the seal between the sleeve 1 and the outer ring frame 3, improving the protective performance, and preventing the seal from being damaged due to high pressure failure. The secondary lip 7 can prevent internal and external impurities from entering, effectively protecting the lip from contamination and reducing the possibility of oil leakage from the seal.

[0020] Both of the support frames are fitted with rubber sleeves on their outer sides to reduce wear on the secondary lip 7 and the side lip 8 when they come into contact with the support frame.

[0021] The main lip 6, secondary lip 7, and side lip 8 are dynamic sealing surfaces with elastic properties and good sealing effect.

[0022] The outer skeleton 4 is in inverted L-shaped cross section, the outer ring frame 3 is also in inverted L-shaped cross section, the outer skeleton 4 comprises an outer axial ring arranged in the axial direction and an outer radial ring arranged in the radial direction and connected with the outer axial ring, the main lip 6 is located inside the outer axial ring, the inverted L-shaped outer skeleton 4 forms a groove on the outer skeleton 4 to facilitate accommodating lubricating oil, when the sealing element encounters high pressure, the outer ring frame 3 in inverted L-shaped cross section inside the sealing element slightly advances to increase the supporting force on the sleeve 1, and the sealing element is prevented from being invalid due to high pressure.

[0023] The auxiliary skeleton 5 comprises a connecting skeleton connecting two branch skeletons, the two branch skeletons are arranged in contact with the outer skeleton 4 through the connecting skeleton, and the auxiliary skeleton 5 is in inverted U-shaped cross section.

[0024] The outer skeleton 4 is fixedly connected with the auxiliary skeleton 5, and the outer skeleton 4 and the auxiliary skeleton 5 are arranged in an integrated mode.

[0025] The materials of the inner skeleton 2, the outer skeleton 4 and the auxiliary skeleton 5 are carbon steel, so that the rigidity is increased and the sealing element is not easily deformed.

[0026] The outer ring frame 3 is a static sealing surface, and the periphery of the outer ring frame 3 is rubber, so that the sealing property of the outer diameter is ensured.

[0027] The outer side of the main lip 6 is provided with an annular spring 9, the spring 9 expands inward to keep the main lip 6 on the outer ring frame 3 in abutting contact with the outer side of the sleeve 1, and the material of the spring 9 is carbon steel, so that certain restraint force is provided for the main lip 6 of the sealing element and the service life of the sealing element is prolonged.

[0028] The inner skeleton 2 is located on the outer periphery of the sleeve 1, the inner skeleton 2 is in a cylindrical shape, and the main lip 6 keeps in abutting contact with the inner skeleton 2 arranged on the outer side of the sleeve 1.

[0029] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely exemplary and is not intended to suggest that the scope of the present application is limited to these examples; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for the sake of brevity.

[0030] The embodiments of the present application are intended to cover all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sleeve-type protective seal, comprising a sleeve, wherein an inner skeleton is provided on the sleeve, and an outer ring frame is provided on the outer sleeve, characterized in that, The outer ring frame is provided with an outer skeleton and a secondary skeleton. The outer skeleton is sleeved on the outside of the secondary skeleton. The outer wall of the secondary skeleton is in contact with the inner wall of the outer skeleton. The secondary skeleton includes two connected support skeletons. The inner wall of the outer ring frame is provided with a side lip that is interference-fitted with the sleeve. A main lip and a secondary lip connected to the outer ring frame are respectively provided on both sides of the side lip. The cross-section of the secondary lip and the side lip is V-shaped. The middle part of the side of the secondary lip and the side lip that are opposite to each other is in contact with the two support skeletons.

2. The sleeve-type protective seal according to claim 1, characterized in that, Both of the aforementioned support frames are fitted with rubber sleeves on their outer sides.

3. A sleeve-type protective seal according to claim 1, characterized in that, The cross-section of the outer frame is inverted L-shaped, and the outer frame includes an outer shaft ring arranged along the axial direction and an outer diameter ring arranged along the radial direction and connected to the outer shaft ring.

4. A sleeve-type protective seal according to claim 1, characterized in that, The sub-frame includes a connecting frame that connects two support frames. The two support frames are in contact with the outer frame through the connecting frame. The cross-section of the sub-frame is inverted U-shaped.

5. A sleeve-type protective seal according to claim 1 or 4, characterized in that, The outer frame is fixedly connected to the sub-frame, and the outer frame and the sub-frame are integrally formed.

6. A sleeve-type protective seal according to claim 1, characterized in that, A ring-shaped spring is provided on the outer side of the main lip. The spring expands inward so that the main lip on the outer ring frame keeps in contact with the outer side of the sleeve.

7. A sleeve-type protective seal according to claim 1, characterized in that, The inner skeleton is located on the outer circumference of the sleeve. The inner skeleton is cylindrical, and the main lip is in contact with the inner skeleton located on the outside of the sleeve.

Images