Accurate positioning iron shell bending type sealing element

Abstract

The utility model relates to the technical field of sealing, in particular to a precise positioning iron shell bending type sealing element which comprises an inner sealing ring, a bending iron shell is arranged in the inner sealing ring, main lips are arranged on the two sides of the inner side wall of the inner sealing ring, an outer sealing ring is arranged outside the inner sealing ring in a sleeving mode, an outer framework is arranged on the outer sealing ring, and the bending iron shell is arranged on the outer framework. A positioning protrusion is arranged on the inner side of the outer sealing ring, an open groove matched with the positioning protrusion in a positioning mode is formed in the inner sealing ring, the inner sealing ring is sleeved with the outer sealing ring, the inner sealing ring can be directly and stably sleeved with the outer sealing ring, and the outer sealing ring is not prone to deviation. And accurate positioning combination between the outer sealing ring and the inner sealing ring is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, and in particular to a precision-positioning iron shell bending seal. Background Technology

[0002] In recent years, with the rapid development of industries such as automobiles and construction machinery, market competition has become increasingly fierce, and the requirements for supporting parts and components have become increasingly stringent.

[0003] For example, a patent with publication number CN107327573A, entitled "A Combined Dustproof Oil Seal Device," was published on November 7, 2017. The device includes a sleeve assembly and an oil seal body. The sleeve assembly includes a rubber ring and an L-shaped metal skeleton embedded in one side of the rubber ring. The oil seal body includes a rubber sealing ring, and a static sealing ring is provided on the outer circumference of the rubber sealing ring along the axial direction of the rubber sealing ring. The rubber sealing ring and the static sealing ring are embedded with a metal skeleton with an axial cross section of L. However, the applicant found that the sleeve assembly and the oil seal body are prone to relative misalignment, posing a risk that the oil seal body may easily become misaligned. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to propose a precise positioning iron shell bending seal to solve the problem of the risk of oil seal body being easily misaligned.

[0005] Based on the above objectives, this utility model provides a precision positioning iron shell bending seal, including an inner sealing ring, in which a bent iron shell is disposed, and main lips are provided on both sides of the inner sidewall of the inner sealing ring. An outer sealing ring is disposed on the outer side of the inner sealing ring, and an outer skeleton is provided on the outer sealing ring. A positioning protrusion is provided on the inner side of the outer sealing ring, and a slot is provided on the inner sealing ring to position and cooperate with the positioning protrusion.

[0006] Optionally, the outer skeleton includes an outer diameter first skeleton and an outer diameter second skeleton, which are located on both sides of the inner sealing ring respectively. The outer diameter first skeleton and the outer diameter second skeleton are connected by an outer shaft skeleton, which abuts against the outer wall of the inner sealing ring.

[0007] Optionally, the inner side of the outer diameter frame one is provided with a positioning protrusion that connects to the outer sealing ring, the inner side of the outer diameter frame two is provided with a mating protrusion that connects to the outer sealing ring, and the inner sealing ring is provided with a mating groove that positions and mates with the mating protrusion.

[0008] Optionally, the outer diameter of the skeleton is provided with multiple positioning holes near the outer peripheral wall, and positioning pins are installed at the positioning holes.

[0009] Optionally, the cross-section of the outer sealing ring is h-shaped or H-shaped.

[0010] Optionally, the outer skeleton is located on the inner circumference of the outer sealing ring, and the outer sealing ring is kept in abutment with the inner sealing ring through the outer skeleton.

[0011] Optionally, two auxiliary lips that are mutually symmetrical and connected with the inner side wall of the inner sealing ring are arranged between the two main lips, and the cross section of the two auxiliary lips is in inverted V shape.

[0012] Optionally, an auxiliary spring in inverted U shape is arranged between the two auxiliary lips, and the lower ends of the auxiliary spring are respectively in contact with the side walls of the two auxiliary lips.

[0013] Optionally, an annular main spring is arranged outside each main lip, and the main spring expands inward to keep the main lip in abutment with the outer side of the shaft that is sleeved by the inner sealing ring.

[0014] The utility model discloses a kind of iron shell bending type sealing pieces of accurate positioning, outer sealing ring is sleeved in outer of inner sealing ring, outer sealing ring can be directly stably set in outer of inner sealing ring, not easily deviate, in addition, the positioning cooperation between positioning protrusion and slot facilitates accurate positioning combination between outer sealing ring and inner sealing ring, the design of two main lips also reduces the risk of deviation. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0016] Fig. 1 It is the structural schematic diagram of the utility model;

[0017] Fig. 2 It is the structural schematic diagram of the inner sealing ring of the utility model;

[0018] Fig. 3 It is the structural schematic diagram of the outer sealing ring of the utility model.

[0019] In the drawing: 1, inner sealing ring; 2, bending iron shell; 3, main lip; 4, auxiliary lip; 5, main spring; 6, auxiliary spring; 7, outer sealing ring; 8, outer skeleton; 9, outer diameter one skeleton; 10, outer diameter two skeleton; 11, outer shaft skeleton; 12, positioning hole; 13, positioning protrusion; 14, slot. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model is further described in detail below in combination with specific embodiments and with reference to the drawings.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the utility model should be understood as the common meanings understood by those skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationships, which can change accordingly when the absolute positions of the described objects change.

[0022] As shown in Figs. 1 to 3 A precise positioning iron shell bending type sealing element, including inner sealing ring 1, the inner sealing ring 1 is provided with bending iron shell 2, the inner sealing ring 1 inner wall both sides are provided with main lip 3, the inner sealing ring 1 is provided with outer sealing ring 7, the outer sealing ring 7 is provided with outer skeleton 8, the inner side of the outer sealing ring 7 is provided with positioning protrusion 13, the inner sealing ring 1 is provided with slot 14 matched with the positioning protrusion 13.

[0023] The outer sealing ring 7 is directly and stably sleeved on the outer side of the inner sealing ring 1, and will not easily deviate, and in addition, the positioning protrusion 13 and the slot 14 are matched to facilitate precise positioning and facilitate the combination of the outer sealing ring 7 and the inner sealing ring 1, and the two main lips 3 effectively improve the sealing performance and service life of the sealing element, and the design of the two main lips 3 also reduces the risk of deviation.

[0024] The outer skeleton 8 includes outer diameter one skeleton 9 and outer diameter two skeleton 10, the outer diameter one skeleton 9 and the outer diameter two skeleton 10 are located on both sides of the inner sealing ring 1 respectively, the outer diameter one skeleton 9 and the outer diameter two skeleton 10 are connected through outer shaft skeleton 11, and the outer shaft skeleton 11 is in abutment with the outer side wall of the inner sealing ring 1.

[0025] The outer diameter one skeleton 9 is provided with positioning protrusions 13 on the inner side connected with the outer sealing ring 7, the outer diameter two skeleton 10 is provided with matching protrusions connected with the outer sealing ring 7, and the inner sealing ring 1 is provided with matching grooves matched with the matching protrusions, so as to facilitate the positioning and matching between the inner sealing ring 1 and the outer sealing ring 7.

[0026] The outer diameter one skeleton 9 is provided with a plurality of positioning holes 12 near the outer peripheral wall, and positioning pins are installed at the positioning holes 12, so that the positioning pins can be accurately positioned on the cylinder, the assembly eccentricity is prevented, the leakage of lubricating oil from the shaft end is prevented, and the sealing element can continue to be used after being disassembled multiple times.

[0027] The outer sealing ring 7 has an h-shaped or H-shaped cross section.

[0028] The outer skeleton 8 is located on the inner circumference of the outer sealing ring 7, and the outer sealing ring 7 is kept in abutting state with the inner sealing ring 1 through the outer skeleton 8, so as to facilitate the closer matching between the inner sealing ring 1 and the outer sealing ring 7.

[0029] Two auxiliary lips 4 are arranged between the two main lips 3 and are connected with the inner side wall of the inner sealing ring 1, the cross section of the two auxiliary lips 4 is inverted V-shaped, and the main lip 3 and the auxiliary lip 4 have two structures acting at the same time to better achieve the effect of the sealing element.

[0030] An auxiliary spring 6 is arranged between the two auxiliary lips 4, the cross section of the auxiliary spring 6 is inverted U-shaped, the two lower ends of the auxiliary spring 6 are respectively arranged in contact with the side walls of the two auxiliary lips 4, and the lower end of the auxiliary spring 6 is connected with the side wall of the auxiliary lip 4 in contact with the lower end. The auxiliary spring 6 provides support for the auxiliary lip 4 to prevent the auxiliary lip 4 from sealing failure.

[0031] An annular main spring 5 is arranged on the outer side of each main lip 3, the main spring 5 expands inward to keep the main lip 3 in abutting state with the outer side of the shaft sleeved in the inner sealing ring 1, the main spring 5 is made of stainless steel, and the two main springs 5 provide a certain binding force for the two main lips 3 and prolong the service life of the sealing element.

[0032] The material of the bent iron shell 2 is carbon steel, which is the basic skeleton of the inner sealing ring 1, increases the rigidity, and makes the sealing element not easily deformed. The material of the outer skeleton 8 is also carbon steel, which increases the rigidity and makes the sealing element not easily deformed.

[0033] It should be understood by those skilled in the art that the above discussion of any embodiment is only exemplary and is not intended to limit the scope of the utility model to these examples; the technical features in the above embodiments or 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 utility model as described above. In order to be brief, they are not provided in details.

[0034] Embodiments of the present application are intended to encompass all such substitutions, modifications and alterations falling within the broad scope of the appended claims. Accordingly, any and all such substitutions, modifications, permutations, improvements, and the like are intended to fall within the scope of the present application.

Claims

1. A precision-positioning iron shell bending seal, comprising an inner sealing ring, wherein a bent iron shell is disposed within the inner sealing ring, and main lips are provided on both sides of the inner sidewall of the inner sealing ring, characterized in that, The inner sealing ring is fitted with an outer sealing ring, the outer sealing ring is provided with an outer skeleton, the inner side of the outer sealing ring is provided with a positioning protrusion, and the inner sealing ring is provided with a slot that positions and cooperates with the positioning protrusion.

2. The precision positioning iron shell bending seal according to claim 1, characterized in that, The outer frame includes an outer diameter first frame and an outer diameter second frame, which are located on both sides of the inner sealing ring. The outer diameter first frame and the outer diameter second frame are connected by an outer shaft frame, which abuts against the outer wall of the inner sealing ring.

3. The precision positioning iron shell bending seal according to claim 2, characterized in that, The inner side of the outer diameter frame one is provided with a positioning protrusion that connects to the outer sealing ring, the inner side of the outer diameter frame two is provided with a mating protrusion that connects to the outer sealing ring, and the inner sealing ring is provided with a mating groove that positions and mates with the mating protrusion.

4. A precision positioning iron shell bending seal according to claim 2, characterized in that, The outer diameter of the skeleton is provided with multiple positioning holes near the outer peripheral wall, and positioning pins are installed at the positioning holes.

5. A precision positioning iron shell bending seal according to claim 2, characterized in that, The cross-section of the outer sealing ring is h-shaped or H-shaped.

6. A precision positioning iron shell bending seal according to claim 1, characterized in that, The outer skeleton is located on the inner circumference of the outer sealing ring, and the outer sealing ring is kept in contact with the inner sealing ring through the outer skeleton.

7. A precision positioning iron shell bending seal according to claim 1, characterized in that, Two symmetrical auxiliary lips are provided between the two main lips and connected to the inner sidewall of the inner sealing ring. The cross-section of the two auxiliary lips is inverted V-shape.

8. A precision positioning iron shell bending seal according to claim 7, characterized in that, An auxiliary spring is provided between the two auxiliary lips. The cross-section of the auxiliary spring is inverted U-shaped. The two lower ends of the auxiliary spring are respectively in contact with the sidewalls of the two auxiliary lips. The lower end of the auxiliary spring is connected to the sidewall of the auxiliary lip it contacts.

9. A precision positioning iron shell bending seal according to claim 1, characterized in that, Each of the main lips is provided with an annular main spring on its outer side. The main spring expands inward so that the main lip is in contact with the outer side of the shaft fitted inside the inner sealing ring.

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