Double-lip exoskeleton rubber oil seal

Abstract

The utility model relates to mechanical seal technical field, concretely relates to a double -lipped outer skeleton rubber oil seal, including the lip rubber spare of installation in the outside of axle, the outside fixed mounting of lip rubber spare is iron spare, the outside of lip rubber spare is coupled with spring ring, and the inside fixed mounting of lip rubber spare has dustproof lip and sealing lip, and the bottom of lip rubber spare is provided with main lip on one side of sealing lip, and the outside of lip rubber spare is connected with support structure between one side of iron spare. When the workpiece axle outside is sleeved into the lip rubber spare, the corner of the lip rubber spare is supported by using the support structure, and the dynamic sealing is carried out to the elastic characteristic of dustproof lip, sealing lip and main lip, has quite good sealing effect to the axle, and the spring ring outside the lip rubber spare provides certain restraint force and prolongs the oil seal life of oil seal lip part, after the workpiece axle is sleeved, the support structure and spring ring abut, limit spring ring movement, and further keep the support stability of oil seal spare.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a double-lipped external skeleton rubber oil seal. Background Technology

[0002] Oil seal is a common term for general sealing components. It is a mechanical component used to seal oil. Oil enters the friction parts of a machine during operation, and oil seals are used to prevent this oil from leaking out of the machine's gaps.

[0003] In the prior art, patent CN106321846A discloses a double-frame oil seal, including a first frame, which has a side lip, a first reinforcing rib, an elastic component, a second frame, a main lip, and a first annular groove. The side lip is disposed on the sealing surface of the first frame through the first annular groove. The bottom of the side lip is also provided with a main lip. The first frame is connected to the second frame. An elastic component is provided in the gap opposite to the sealing surface of the first frame and on the outside of the main lip. The first frame and the second frame are provided with a first reinforcing rib inside.

[0004] The above structure increases the strength of the skeleton and limits the depth of oil seal installation. However, after the workpiece shaft is inserted, the elastic component needs to provide a certain binding force on the oil seal lip. The elastic component is easy to move, resulting in insufficient support stability of the oil seal. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a double-lipped outer skeleton rubber oil seal to solve the problem that after the workpiece shaft is fitted, the elastic component needs to provide a certain binding force to the oil seal lip, and the elastic component is easy to move, resulting in insufficient support stability of the oil seal.

[0006] Based on the above objectives, this utility model provides a double-lipped external skeleton rubber oil seal, including a lip rubber component installed outside the shaft, an iron component fixedly installed on the outside of the lip rubber component, a spring ring sleeved on the outside of the lip rubber component, and a dustproof lip and a sealing lip fixedly installed inside the lip rubber component. Both the dustproof lip and the sealing lip are inclined, and a main lip is provided on one side of the sealing lip at the bottom of the lip rubber component.

[0007] A support structure is connected between one side of the iron part and the outside of the lip rubber part. The support structure is used to provide a stable binding force to the oil seal lip.

[0008] Preferably, at least four sets of the support structure are provided, and the support structures are equidistantly distributed on the inner side of the iron piece.

[0009] Preferably, the support structure includes a skeleton branch fixedly installed on the inner side of the iron part, a sliding groove is provided on the outside of the skeleton branch, a stop bead is slidably installed inside the sliding groove, and the stop bead abuts against the outside of the lip rubber part;

[0010] A locking block is slidably installed on the outside of the skeleton branch near the corner of the iron part. A protrusion is provided on one side of the locking block, and a limiting hole corresponding to the protrusion is opened on one side of the skeleton branch.

[0011] Preferably, the card block has a triangular structure, and the ends of the card block are all chamfered.

[0012] Preferably, the groove is inclined, the radius of the stop bead is smaller than the cross-sectional radius of the spring coil, and the stop bead abuts against the spring coil.

[0013] Preferably, the skeleton branches and locking blocks are made of plastic, and the iron parts are made of carbon steel.

[0014] The beneficial effects of this utility model are:

[0015] When the workpiece shaft is fitted with the lip rubber component, the support structure supports the corners of the lip rubber component. At the same time, the elastic properties of the dustproof lip, sealing lip, and main lip provide dynamic sealing, resulting in a very good sealing effect on the shaft. Meanwhile, the spring ring on the outside of the lip rubber component provides a certain binding force to the oil seal lip and extends the oil seal life. After being fitted with the workpiece shaft, the support structure abuts against the spring ring, further restricting the movement of the spring ring, thereby further maintaining the support stability of the oil seal component. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the lip rubber part of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the retaining ball and spring ring of this utility model.

[0020] The markings in the diagram are: 1. Iron part; 2. Rubber lip part; 3. Spring ring; 4. Dustproof lip; 5. Sealing lip; 6. Main lip; 7. Support structure; 8. Locking block; 9. Skeleton branch; 10. Slide groove; 11. Limiting hole; 12. Protrusion; 13. Stop bead. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, a double-lipped external skeleton rubber oil seal includes a lip rubber component 2 installed on the outside of a shaft. An iron component 1 is fixedly installed on the outside of the lip rubber component 2. A spring ring 3 is sleeved on the outside of the lip rubber component 2. A dustproof lip 4 and a sealing lip 5 are fixedly installed inside the lip rubber component 2. Both the dustproof lip 4 and the sealing lip 5 are inclined. A main lip 6 is provided on one side of the sealing lip 5 at the bottom of the lip rubber component 2.

[0023] A support structure 7 is connected between one side of the iron part 1 and the outside of the lip rubber part 2. The support structure 7 is used to provide a stable binding force to the oil seal lip.

[0024] In this embodiment, when the workpiece shaft is fitted with the lip rubber part 2, the support structure 7 supports the corner of the lip rubber part 2. At the same time, the elastic properties of the dustproof lip 4, sealing lip 5 and main lip 6 provide dynamic sealing, which has a very good sealing effect on the shaft. Meanwhile, the spring ring 3 outside the lip rubber part 2 provides a certain binding force to the oil seal lip and extends the oil seal life. After the workpiece shaft is fitted, the support structure 7 abuts against the spring ring 3, thereby further maintaining the support stability of the oil seal.

[0025] As one implementation method, such as Figure 1 As shown, at least four sets of support structures 7 are provided, and the support structures 7 are equidistantly distributed on the inner side of the iron part 1.

[0026] In this embodiment, after being fitted onto the workpiece shaft, the oil seal is further strengthened by multiple sets of support structures 7 abutting against the outside of the spring ring 3.

[0027] As one implementation method, such as Figure 2 and Figure 3 As shown, the support structure 7 includes a skeleton branch 9 fixedly installed inside the iron part 1. A groove 10 is provided on the outside of the skeleton branch 9. A stop bead 13 is slidably installed inside the groove 10. The stop bead 13 abuts against the outside of the lip rubber part 2.

[0028] A locking block 8 is slidably installed on the outside of the skeleton branch 9 near the corner of the iron part 1. A protrusion 12 is provided on one side of the locking block 8, and a limiting hole 11 corresponding to the protrusion 12 is opened on one side of the skeleton branch 9.

[0029] In this embodiment, the retaining bead 13 is located in the slide groove 10 within the skeleton branch 9, supporting the corner of the lip rubber part 2. Then, the outer part of the workpiece shaft is fitted into the lip rubber part 2. After the workpiece shaft is fitted, multiple sets of retaining beads 13 slide along the slide groove 10 until the retaining bead 13 abuts against the outer part of the spring ring 3. Then, the locking block 8 is moved downward so that one side of the locking block 8 engages with the retaining bead 13. The protrusion 12 on one side of the locking block 8 engages in the limiting hole 11, thereby further maintaining the support stability of the oil seal.

[0030] As one implementation method, such as Figure 2 and Figure 3 As shown, the card block 8 has a triangular structure, and the ends of the card block 8 are all chamfered.

[0031] In this embodiment, the locking block 8 and the retaining bead 13 are in contact. The combination of the locking block 8 and the retaining bead 13 supports the spring ring 3. At the same time, when the workpiece shaft is inserted into the lip rubber part 2, the retaining bead 13 can support the corner of the lip rubber part 2.

[0032] As one implementation method, such as Figure 2 As shown, the slide groove 10 is inclined, the radius of the stop bead 13 is smaller than the cross-sectional radius of the spring coil 3, and the stop bead 13 abuts against the spring coil 3.

[0033] In this embodiment, since the slide groove 10 is inclined, after the workpiece shaft is fitted, multiple sets of stop beads 13 slide along the slide groove 10 until the stop beads 13 abut against the outside of the spring ring 3. Then the locking block 8 is moved downward so that one side of the locking block 8 engages with the stop beads 13. The protrusion 12 on one side of the locking block 8 engages in the limiting hole 11, thereby further maintaining the support stability of the oil seal.

[0034] As one implementation method, such as Figure 2 and Figure 3 As shown, the skeleton branch 9 and the card block 8 are both made of plastic, while the iron part 1 is made of carbon steel.

[0035] In this embodiment, the basic skeleton is made more rigid so that the oil seal will not easily deform, and the front chamfer design has better stability and precise assembly characteristics.

[0036] Working principle: When in use, the retaining ball 13 is located in the groove 10 inside the skeleton branch 9, supporting the corner of the lip rubber part 2. Then, the workpiece shaft is fitted into the lip rubber part 2. The elastic properties of the dustproof lip 4, sealing lip 5 and main lip 6 are used to achieve dynamic sealing, which has a very good sealing effect on the shaft. At the same time, the spring ring 3 outside the lip rubber part 2 provides a certain binding force to the oil seal lip and extends the oil seal life.

[0037] After the workpiece shaft is inserted, multiple sets of retaining beads 13 are slid along the slide groove 10 until the retaining beads 13 abut against the outside of the spring ring 3. Then the locking block 8 is moved downward so that one side of the locking block 8 engages with the retaining beads 13. The protrusion 12 on one side of the locking block 8 is inserted into the limiting hole 11, thereby further maintaining the support stability of the oil seal.

[0038] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0039] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-lip outer-skeleton rubber oil seal, comprising a lip rubber member (2) mounted outside a shaft, an iron member (1) fixedly mounted outside the lip rubber member (2), characterized in that, The outer side of the lip rubber part (2) is fitted with a spring ring (3), and the inner side of the lip rubber part (2) is fixedly installed with a dustproof lip (4) and a sealing lip (5). The dustproof lip (4) and the sealing lip (5) are both inclined. The sealing lip (5) has a main lip (6) at the bottom of the lip rubber part (2) on one side. A support structure (7) is connected between one side of the iron part (1) and the outside of the lip rubber part (2), and the support structure (7) is used to provide a stable binding force to the oil seal lip.

2. The double-lip exoskeleton rubber oil seal according to claim 1, characterized in that, The support structure (7) is provided in at least four sets, and the support structure (7) is distributed equidistantly on the inner side of the iron piece (1).

3. The double-lip exoskeleton rubber oil seal according to claim 2, characterized in that, The support structure (7) includes a skeleton branch (9) fixedly installed inside the iron part (1). A groove (10) is provided on the outside of the skeleton branch (9). A stop bead (13) is slidably installed inside the groove (10). The stop bead (13) abuts against the outside of the lip rubber part (2). A locking block (8) is slidably installed on the outside of the skeleton branch (9) near the corner of the iron piece (1). A protrusion (12) is provided on one side of the locking block (8), and a limiting hole (11) corresponding to the protrusion (12) is opened on one side of the skeleton branch (9).

4. The double-lip exoskeleton rubber oil seal according to claim 3, characterized in that, The card block (8) has a triangular structure, and the ends of the card block (8) are all chamfered.

5. A double-lip exoskeleton rubber oil seal according to claim 3, characterized in that, The groove (10) is inclined, the radius of the stop bead (13) is smaller than the cross-sectional radius of the spring ring (3), and the stop bead (13) abuts against the spring ring (3).

6. A double-lip exoskeleton rubber oil seal according to claim 3, characterized in that, The skeleton branch (9) and the card block (8) are both made of plastic, while the iron part (1) is made of carbon steel.

Images