CN219796101U - Oil seal with dust cover - Google Patents

Abstract

The utility model belongs to the technical field of sealing devices, and particularly relates to an oil seal with a dust cover, which comprises an outer oil seal body and an inner oil seal body, wherein the outer oil seal body consists of a framework, a main oil seal elastomer and a storage cavity, an annular connecting seat is fixed at the bottom of the framework, a lower dust cover shell is connected with the bottom of the annular connecting seat in a threaded manner, an upper dust cover shell is connected with the top of the framework in a threaded manner, a first shaft hole and a second shaft hole are respectively formed in the middle positions of the lower dust cover shell and the upper dust cover shell, a rotating shaft is assembled in the central hole of the inner oil seal body in an interference manner, and two ends of the rotating shaft respectively penetrate through the first shaft hole and the second shaft hole and extend to the outer parts of the lower dust cover shell and the upper dust cover shell. According to the utility model, the lower dust cover shell, the annular connecting seat, the framework and the dust cover shell are arranged, so that the dust cover plays a role in preventing dust from entering the oil seal, and the service life of the oil seal is prolonged by preventing dust from entering the oil seal.

Description

Oil seal with dust cover

Technical Field

The utility model relates to the technical field of sealing devices, in particular to an oil seal with a dust cover.

Background

In the prior art, the automobile engine has the characteristics of high rotating speed, high temperature, high sealing performance requirement and the like, and in order to prevent engine oil leakage, an oil seal is required to be arranged on the part of the crankshaft of the automobile piston engine, which extends out of the engine body. The commonly used oil seals are mostly elastic bodies and are arranged in oil seal seat holes, oil leaks out from a bearing bush and a crank shaft gap in a bearing seat when an engine works, is thrown out by a rotating shaft end to splash at a position of the shaft surface facing an oil seal lip for lubrication, and flows back to an engine oil pan from an engine oil drain overflow port at the lower part; the sealing lip of the oil seal is usually provided with a unidirectional oil return line, and the oil seal lip is worn, aged and cracked.

According to patent number CN201710687407.X, a rotary oil seal is disclosed, comprising a main oil seal framework, a main oil seal elastomer, an auxiliary oil seal framework and an auxiliary oil seal elastomer, wherein the main oil seal elastomer is provided with a main lip and an auxiliary lip, the auxiliary oil seal elastomer is provided with a semi-annular lip, and the main oil seal and the auxiliary oil seal are matched for use; a spring is arranged in the back groove of the main lip, and the main lip is sinusoidal; the auxiliary oil seal framework is cylindrical, one port of the auxiliary oil seal framework is a flat port, the other port of the auxiliary oil seal framework is a flanging ring, the auxiliary oil seal elastomer is coated on the outer side of the auxiliary oil seal framework, and the semi-annular lip is arranged on the lower half part of the flat port end of the auxiliary oil seal framework.

The prior art has the following problems:

1. the existing oil seal has the following defects: the oil seal is not provided with a dust cover, so that external dust cannot be prevented from entering the oil seal.

2. The cavity gap of the oil seal is easy to be worn due to entering sundries, so that the wear of the oil seal affects the sealing performance of the oil seal, and the oil seal is required to be repaired or replaced.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides an oil seal with a dust cover, which solves the existing problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a take oil blanket of dust cover, including outer oil blanket body and interior oil blanket body, outer oil blanket body comprises skeleton, main oil blanket elastomer and storage chamber, the bottom of skeleton is fixed with annular connecting seat, the bottom threaded connection of annular connecting seat has lower dust cover casing, the top threaded connection of skeleton has last dust cover casing, first shaft hole and second shaft hole have been seted up respectively to the intermediate position of lower dust cover casing and last dust cover casing, the centre bore interference fit of interior oil blanket body has the axis of rotation, the both ends of axis of rotation run through first shaft hole and second shaft hole respectively and extend to the outside of lower dust cover casing and last dust cover casing, outer oil blanket body compresses tightly the setting between skeleton and main oil blanket elastomer.

As a preferable technical scheme of the utility model, an oil inlet is formed in the upper part of one side of the framework, an oil inlet pipe is fixedly connected to the inner wall of the oil inlet, an oil outlet is formed in the lower part of one side of the framework, an oil outlet pipe is fixedly arranged on the inner wall of the oil outlet, and one ends of the oil outlet pipe and the oil inlet pipe are both in threaded connection with a dust cover.

As a preferable technical scheme of the utility model, an oil collecting groove is formed in a sealed space formed by the framework and the outer oil seal body, and the oil inlet pipe and the oil outlet pipe are communicated with the inside of the oil collecting groove.

As a preferable technical scheme of the utility model, a storage cavity is formed in a sealed space formed by the inner oil seal body, the outer oil seal body and the main oil seal elastomer.

As a preferable technical scheme of the utility model, the main oil seal elastomer is rubber, the main oil seal elastomer is adhered to the outer oil seal body, and the annular connecting seat is fixedly arranged at the bottom of the framework.

As a preferable technical scheme of the utility model, the inner walls of the lower dust cover shell and the upper dust cover shell are respectively provided with internal threads, and the outer walls of the framework and the annular connecting seat are provided with external threads matched with the internal threads.

As a preferable technical scheme of the utility model, the framework is an exposed metal framework.

Compared with the prior art, the utility model provides the oil seal with the dust cover, which has the following beneficial effects:

1. this kind of oil blanket with dust cover, through being provided with lower dust cover casing, annular connecting seat, skeleton and dust cover casing, the dust cover plays dustproof effect to the oil blanket, can avoid the dust to enter into the inside of oil blanket, through dustproof to the oil blanket, has improved the life of oil blanket;

2. this take oil blanket of dust cover has offered inlet port and oil outlet through on the skeleton to the cooperation has inlet tube and oil outlet pipe, makes things convenient for outside lubricating oil to enter into the inside of oil collecting groove, makes things convenient for the inside lubricating oil outflow of oil blanket simultaneously, conveniently changes and uses lubricating oil, has further improved the performance of oil blanket.

Drawings

FIG. 1 is a schematic view of the overall cross-sectional structure of the present utility model;

FIG. 2 is a schematic bottom view of the upper dust cap housing of FIG. 1;

fig. 3 is a schematic bottom view of the lower dust cap housing of fig. 1.

In the figure: 1. a rotating shaft; 2. an inner oil seal body; 3. a skeleton; 4. an annular connecting seat; 5. a storage chamber; 6. an oil sump; 7. an outer oil seal body; 8. a main oil seal elastomer; 9. a lower dust cover shell; 901. a first shaft hole; 10. an upper dust cap housing; 101. a second shaft hole; 11. an oil outlet pipe; 12. an oil inlet pipe; 13. a dust cover.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 3, in the present embodiment: the utility model provides a take oil blanket of dust cover, including outer oil blanket body 7 and interior oil blanket body 2, outer oil blanket body 7 comprises skeleton 3, main oil blanket elastomer 8 and bin 5, the bottom of skeleton 3 is fixed with annular connecting seat 4, annular connecting seat 4's bottom threaded connection has lower dust cover casing 9, skeleton 3's top threaded connection has last dust cover casing 10, first shaft hole 901 and second shaft hole 101 have been seted up respectively to the intermediate position of lower dust cover casing 9 and last dust cover casing 10, the centre bore interference fit of interior oil blanket body 2 has axis of rotation 1, the both ends of axis of rotation 1 run through first shaft hole 901 and second shaft hole 101 respectively and extend to the outside of lower dust cover casing 9 and last dust cover casing 10, outer oil blanket body 7 compresses tightly the setting between skeleton 3 and main oil blanket elastomer 8.

In the embodiment, an oil inlet is formed in the upper part of one side of the framework 3, an oil inlet pipe 12 is fixedly connected to the inner wall of the oil inlet, an oil outlet is formed in the lower part of one side of the framework 3, an oil outlet pipe 11 is fixedly installed on the inner wall of the oil outlet, and one ends of the oil outlet pipe 11 and the oil inlet pipe 12 are both in threaded connection with a dust cover 13; the outside lubricating oil is convenient to enter the oil collecting groove 6 through the oil inlet pipe 12; an oil collecting groove 6 is formed in a sealed space formed by the framework 3 and the outer oil seal body 7, an oil inlet pipe 12 and an oil outlet pipe 11 are communicated with the inside of the oil collecting groove 6, the oil collecting groove 6 can be used for storing lubricating oil, the lubricating oil plays a role in lubricating and reducing friction and abrasion caused by contact of two objects, a storage cavity 5 is formed in the sealed space formed by the inner oil seal body 2, the outer oil seal body 7 and the main oil seal elastomer 8, the storage cavity 5 can be used for storing grease, solid lubricating grease can effectively reduce lubricating oil leakage, continuous supply of lubricating oil can be ensured, surrounding environment is prevented, the main oil seal elastomer 8 is rubber, the main oil seal elastomer 8 is adhered to the outer oil seal body 7, an annular connecting seat 4 is fixedly arranged at the bottom of the framework 3, inner threads are arranged on the inner walls of a lower dust cover shell 9 and an upper dust cover shell 10, outer threads matched with the inner threads are arranged on the outer walls of the framework 3 and the annular connecting seat 4, and the framework 3 is an exposed metal framework; the lower dust cover shell 9 and the upper dust cover shell 10 are in threaded connection with the annular connecting seat 4 and the framework 3, so that external dust is prevented from entering the oil seal to play a dustproof role, and meanwhile, the dust cover is convenient to detach and assemble, clean or replace, and convenient to use.

The working principle and the using flow of the utility model are as follows: firstly, the inner oil seal body 2 and the outer oil seal body 7 are combined together, the inner oil seal body 2 and the outer oil seal body 7 are pressed into a set position through special tools, the outer oil seal body 7 is fixed in the cavity through interference of the outer diameter and the cavity and plays a static sealing function, the inner oil seal body 2 is fixed on the rotating shaft 1 through interference of an inner hole and the rotating shaft 1, the lower dust cover shell 9 is in threaded connection with the annular connecting seat 4, the framework 3 is in threaded connection with the upper dust cover shell 10, the dust prevention function is achieved through the arrangement of the lower dust cover shell 9 and the upper dust cover shell 10, dust can be prevented from entering the oil seal, external lubricating oil enters the oil collecting groove 6 through the oil inlet pipe 12, meanwhile, the lubricating oil can flow out through the oil outlet pipe 11, a storage cavity 5 is formed in a sealing space formed among the inner oil seal body 2, the outer oil seal body 7 and the main oil seal elastomer 8, grease can be used for storing grease, solid lubricating grease can be effectively reduced, continuous supply of lubricating oil can be ensured, and surrounding environment can be prevented from being polluted.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (7)

1. The utility model provides a take oil blanket of dust cover, includes outer oil blanket body (7) and interior oil blanket body (2), its characterized in that: the outer oil seal body (7) comprises skeleton (3), main oil seal elastomer (8) and storage chamber (5), the bottom of skeleton (3) is fixed with annular connecting seat (4), the bottom threaded connection of annular connecting seat (4) has dust cover casing (9) down, the top threaded connection of skeleton (3) has dust cover casing (10) down, first shaft hole (901) and second shaft hole (101) have been seted up respectively to the intermediate position of dust cover casing (9) and last dust cover casing (10), the centre bore interference of interior oil seal body (2) is equipped with axis of rotation (1), the outside that first shaft hole (901) and second shaft hole (101) are run through respectively to dust cover casing (9) and last dust cover casing (10) down, outer oil seal body (7) compress tightly and set up between skeleton (3) and main oil seal elastomer (8).

2. An oil seal with a dust cover as set forth in claim 1, wherein: the oil inlet is formed in the upper portion of one side of the framework (3), the oil inlet pipe (12) is fixedly connected to the inner wall of the oil inlet, the oil outlet is formed in the lower portion of one side of the framework (3), the oil outlet pipe (11) is fixedly mounted on the inner wall of the oil outlet, and the dustproof cover (13) is connected to one ends of the oil outlet pipe (11) and the oil inlet pipe (12) in a threaded mode.

3. An oil seal with a dust cover as set forth in claim 2, wherein: an oil collecting groove (6) is formed in a sealing space formed by the framework (3) and the outer oil seal body (7), and the oil inlet pipe (12) and the oil outlet pipe (11) are communicated with the inside of the oil collecting groove (6).

4. A dust boot-carrying oil seal as claimed in claim 3, wherein: the inner oil seal body (2), the outer oil seal body (7) and the main oil seal elastomer (8) form a storage cavity (5) in a sealed space.

5. An oil seal with a dust cover as set forth in claim 1, wherein: the main oil seal elastic body (8) is rubber, the main oil seal elastic body (8) is adhered to the outer oil seal body (7), and the annular connecting seat (4) is fixedly arranged at the bottom of the framework (3).

6. An oil seal with a dust cover as set forth in claim 1, wherein: the inner walls of the lower dust cover shell (9) and the upper dust cover shell (10) are respectively provided with internal threads, and the outer walls of the framework (3) and the annular connecting seat (4) are respectively provided with external threads matched with the internal threads.

7. An oil seal with a dust cover as set forth in claim 1, wherein: the framework (3) is an exposed metal framework.