CN208431375U - A kind of combination oil seal structure - Google Patents

Abstract

The utility model provides a kind of combination oil seal structure, including the second seal (10) and the second skeleton (12), form a fixed connection structure between second seal (10) and the second skeleton (12), secondary lip (6) and outer secondary lip (9) in being formed on second seal (10), the second spring (7) of secondary lip (6) in ring is set on the outside of the interior secondary lip (6), the third spring (11) of the outer secondary lip (9) of setting ring on the outside of the outer secondary lip (9), the second spring (7), third spring (11) is located at the opposite sides of the second skeleton (12).When the utility model and main shaft are used cooperatively, Multi-point sealing structure can be formed between the two, second spring therein, third spring can also be respectively that the lip where it provides permanent back-off radial force, greatly improve the sealing reliability of oil seal product.

Description

A kind of combination oil seal structure

Technical field

The utility model relates to oil enveloping structure design fields, more particularly, to a kind of combination oil seal structure.

Background technique

Outer secondary unlubricated dose of lip in traditional oil enveloping structure, as the spindle turns, main shaft surface can rub with lip It wipes and lip is caused to wear, until oil seal failure.After outer secondary lip mill is rotten to be ground off, the impurity such as extraneous dust, muddy water will Into near interior secondary lip, to accelerate the abrasion of interior secondary lip, until failure.After interior secondary lip failure, dust, muddy water And its sundries that abrasion generates can enter near main lip again, and then cause main lip that abrasive wear occurs and fails, and cause Oil leak.

Utility model content

Technical problem to be solved by the utility model is: in view of the problems of the existing technology, providing a kind of combination oil seal Structure improves the sealing reliability of oil seal product.

The technical problems to be solved in the utility model is realized using following technical scheme: a kind of combination oil seal structure, packet The second seal and the second skeleton are included, form a fixed connection structure between second seal and the second skeleton, and described Interior secondary lip and outer secondary lip are formed on two seals, and the second spring of secondary lip in ring, institute are set on the outside of the interior secondary lip The third spring of the outer secondary lip of setting ring on the outside of outer secondary lip is stated, the second spring, third spring are located at the second bone The opposite sides of frame.

Preferably, further include the first seal and the first skeleton, form main lip on first seal, described It is fixedly connected between one skeleton and the second skeleton by the first seal into a single integrated structure.

Preferably, the first spring of the outside setting main lip of ring of the main lip.

Preferably, further include baffle, form Hermetical connecting structure between the baffle and the second skeleton.

Preferably, the T-shaped structure of the second skeleton, shape between the relatively long side and baffle in second skeleton At sealing structure is rabbeted, the relatively short side in second skeleton is between second spring and third spring.

Preferably, groove is formed on second seal, fills lubricating grease in the groove.

Preferably, wave structure is formed on the outer circle outside of second seal.

Compared with prior art, the utility model has the beneficial effects that passing through secondary lip in setting ring on the outside of secondary lip inside The third spring of the second spring of mouth, the outside outer pair lip of secondary lip outside setting ring, and second spring, third spring are distinguished Multi-point sealing knot can be formed between the two when oil seal product is used cooperatively with main shaft positioned at the opposite sides of the second skeleton Structure, so that the sealing reliability of oil seal product be enable to greatly enhance.

Detailed description of the invention

Fig. 1 is a kind of organigram of combination oil seal structure of the utility model.

Fig. 2 is a kind of operation principle schematic diagram of combination oil seal structure of the utility model.

Component token name claims in figure: 1- baffle, the first spring of 2-, the first seal of 3-, the main lip of 4-, 5- oil drive back thread, 6- Interior pair lip, 7- second spring, 8- lubricating grease, the outer secondary lip of 9-, the second seal of 10-, 11- third spring, the second bone of 12- Frame, 13- outer circle, the first skeleton of 14-, 15- main shaft, 16- lubricant medium, 17- cylinder body.

Specific embodiment

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to the accompanying drawing and specifically The utility model is described in detail in embodiment.It should be appreciated that specific embodiment described herein is only used to explain this Utility model is not used to limit the utility model.

Combination oil seal structure as shown in Figure 1 specifically includes baffle 1, the first spring 2, the first seal 3, second spring 7, the second seal 10, third spring 11 and the first skeleton 14 and the second skeleton 12 form master on first seal 3 Lip 4, between first skeleton 14 and the second skeleton 12 by the first seal 3 be fixedly connected it is into a single integrated structure, in master First spring 2 of the outside setting main lip 4 of ring of lip 4, forms between the baffle 1 and the second skeleton 12 and is tightly connected knot Structure.Interior secondary lip 6 and outer secondary lip 9 are formed on second seal 10, and pair lip in ring is set on the outside of the interior secondary lip 6 Mouthfuls 6 second spring 7, the third spring 11 of the outer secondary lip 9 of setting ring on the outside of the outer secondary lip 9, the second spring 7, Third spring 11 is located at the opposite sides of the second skeleton 12, is formed between second seal 10 and the second skeleton 12 Fixed connection structure.

Combinations of the above oil seal product is used cooperatively with main shaft when in use, specifically, as shown in Fig. 2, described second is close It seals between the mounting hole in the outer circle 13 and cylinder body 17 of body 10 and static sealing structure is formed with interference fit type, it is preferable that can To form wave structure on the outside of outer circle 13, as shown in Figure 1, to reduce the assembly force of oil sealing and not influence static seal Effect.Oil seal product is run through in described 15 one end of main shaft, is formed by cavity and fills with oil seal product in main shaft 15, cylinder body 17 Lubricant medium 16, the main lip 4, interior secondary lip 6, outer secondary lip 9 form sealing structure between main shaft 15 respectively, thus So that Multi-point sealing structure can be formed between oil seal product and main shaft 15, the sealed reliable of oil seal product is effectively enhanced Property.

As shown in Fig. 2, the main lip 4 can prevent it with sealing lubrication medium 16 when main shaft 15 makes rotating motion Flow to outside air side；The outer secondary lip 9 can prevent the impurity such as external dust, muddy water from entering near interior secondary lip 6；Institute The interior secondary lip 6 stated can prevent again or slow down the trash flows such as dust, the muddy water entered from the external world to inner cavity oil side；Described Oil drive back thread 5 on one seal 3 can make the oil overflowed from oily side be pumped back to oily side again.The speed of lubricant medium 16 therein Change with liquid level with working condition, not plus before baffle 1, lubricant medium 16 directly impact main lip 4 and its near, easily Main 4 local vibration of lip is caused to be distorted and cause oil leak.Second skeleton 12 preferably uses T-shaped structure, therein opposite Between longer sides and baffle 1 formed interlocking sealing structure, relatively short side is between second spring 7 and third spring 11, such as Shown in Fig. 1, it is arranged after baffle 1 by increasing, so that it may the impact dynamics for weakening lubricant medium 16 significantly, to improve oil sealing The sealing reliability of product.

In addition, groove can be formed on the second seal 10, and lubricating grease 8 is filled in the groove, such as Fig. 1 institute Show.When main shaft 15 makes rotating motion, outer secondary lip 9 and interior secondary lip 6 can be made preferably to be lubricated, so as to Slow down the abrasion of 15 surface of main shaft externally secondary lip 9, interior secondary lip 6 significantly, also, even if outer pair lip 9, interior secondary lip 6 have It is worn, but due to thering is second spring 7, third spring 11 to provide enclasping force, so that outer pair lip 9, interior secondary lip 6 and main shaft 15 It can fit together again.With certain buffer action when the lubricating grease 8 is molten condition, even if dust, muddy water etc. are miscellaneous Object enters from outer secondary lip 9, to enter back into interior secondary lip 6 also very slowly.

In the combination oil seal structure of the utility model, the baffle 1 preferably uses cold-rolled steel, for stopping oil liquid straight Connect impact sealed lip.First seal 3 and the second seal 10 preferably uses high elastic rubber material, close to enhance Sealing property.First spring 2, second spring 7, third spring 11 preferably use spring winding steel wire, to be respectively its institute Lip permanent back-off radial force is provided.First skeleton 14, the second skeleton 12 preferably use cold-rolled steel, so that oily Envelope keeps sufficiently rigid, avoids installing and deforming in.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, and should refer to Out, any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc. should all include It is within the protection scope of the utility model.

Claims (7)

1. a kind of combination oil seal structure, including the second seal (10) and the second skeleton (12), second seal (10) with Form a fixed connection structure between second skeleton (12), it is characterised in that: secondary lip in being formed on second seal (10) The second spring (7) of pair lip (6) in ring, the outer pair is arranged in mouth (6) and outer secondary lip (9), interior secondary lip (6) outside The third spring (11) of the outer secondary lip (9) of setting ring on the outside of lip (9), the second spring (7), third spring (11) are respectively Opposite sides positioned at the second skeleton (12).

2. a kind of combination oil seal structure according to claim 1, it is characterised in that: further include the first seal (3) and One skeleton (14) is formed main lip (4) on first seal (3), first skeleton (14) and the second skeleton (12) Between by the first seal (3) be fixedly connected it is into a single integrated structure.

3. a kind of combination oil seal structure according to claim 2, it is characterised in that: the outside of the main lip (4) is arranged The first spring (2) of the main lip of ring (4).

4. a kind of combination oil seal structure according to claim 1-3, it is characterised in that: further include baffle (1), institute It states and forms Hermetical connecting structure between baffle (1) and the second skeleton (12).

5. a kind of combination oil seal structure according to claim 4, it is characterised in that: second skeleton (12) is T-shaped Structure forms interlocking sealing structure, second skeleton between the relatively long side and baffle (1) in second skeleton (12) (12) the relatively short side in is located between second spring (7) and third spring (11).

6. a kind of combination oil seal structure according to claim 1-3, it is characterised in that: second seal (10) groove is formed on, fills lubricating grease (8) in the groove.

7. a kind of combination oil seal structure according to claim 1-3, it is characterised in that: second seal (10) wave structure is formed on the outside of outer circle (13).