CN213451607U

CN213451607U - Double sealing structure of gear box

Info

Publication number: CN213451607U
Application number: CN202022443181.9U
Authority: CN
Inventors: 尹宣武
Original assignee: Nanjing Huida Machinery Equipment Co ltd
Current assignee: Nanjing Huida Machinery Equipment Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-06-15
Anticipated expiration: 2030-10-29

Abstract

The utility model provides a double sealing structure of a gear box, which comprises a main shaft, a shaft sleeve and an end cover, wherein the shaft sleeve and the end cover are assembled on the main shaft, the end part of the shaft sleeve is provided with a sealing ring, the surface of the main shaft is provided with a spherical bulge, and the inner wall of the shaft sleeve is provided with a spherical groove matched with the spherical bulge; a sealing groove and a sealing tooth which are matched are arranged at the joint position of the end cover and the shaft sleeve, and a gap is formed between the sealing groove and the sealing tooth to form non-contact sealing; the sealing device further comprises a pressing plate pressed between the shaft sleeve and the end cover, and the pressing plate and the end cover are locked through bolts to form contact sealing. Double sealing, sealed effectual.

Description

Double sealing structure of gear box

Technical Field

The utility model relates to a technical field is made to the gear box, concretely relates to gear box double seal structure.

Background

The sealing device is an indispensable part of an engine, and oil, water and gas of the engine need to be sealed. With the continuous development of scientific technology, the arrangement of an engine is more and more compact, the integration is higher and higher, and the requirement on sealing is higher and higher, particularly the sealing of an engine crankshaft and a gearbox is important to the service efficiency and the service life of the engine.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gear box double seal structure, dustproof and waterproof, inside the effectual dust of avoiding enters into the box, realize double seal, sealed effectual.

The utility model provides a following technical scheme:

a double sealing structure of a gear box comprises a main shaft, a shaft sleeve and an end cover, wherein the shaft sleeve and the end cover are assembled on the main shaft, a sealing ring is arranged at the end part of the shaft sleeve, a spherical bulge is arranged on the surface of the main shaft, and a spherical groove matched with the spherical bulge is arranged on the inner wall of the shaft sleeve; a sealing groove and a sealing tooth which are matched are arranged at the joint position of the end cover and the shaft sleeve, and a gap is formed between the sealing groove and the sealing tooth;

the pressing plate is pressed between the shaft sleeve and the end cover, and the pressing plate and the end cover are locked through bolts.

Preferably, a positioning block and a positioning groove which are matched with each other are arranged between the side wall of the end cover and the pressing plate.

Preferably, one side of the end cover opposite to the pressing plate is provided with a trapezoidal step, one side of the pressing plate is provided with a trapezoidal block clamped with the step, and the trapezoidal block and the end cover are fixed through bolts.

Preferably, the shaft sleeve is further provided with a pressing block, the bottom of the pressing block is embedded in the shaft sleeve, and the top of the pressing block is protruded and is in contact with the outer side face of the pressing plate.

Preferably, the gap is 0.2mm to 0.3 mm.

Preferably, the device further comprises a framework oil seal arranged between the end cover and the pressure plate.

Preferably, the device further comprises a backflow hole, and the backflow hole is communicated with the gap.

The utility model has the advantages that: the shaft sleeve and the end cover are combined with the sealing teeth through the sealing groove to form an oil film gap so as to prevent lubricating oil from flowing to the sealing position of the pressing plate and flowing back to the box body along the backflow hole through the sealing groove, so that the sealing performance is good and the leakage is not easy to occur; secondly, compress tightly end cover and axle sleeve through the clamp plate, dustproof and waterproof, inside the effectual dust of avoiding enters into the box, realize double seal, sealed effectual.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of portion A of FIG. 1;

labeled as: 1. a main shaft; 2. a shaft sleeve; 3. a spherical bulge; 4. a return orifice; 5. a sealing groove; 6. a seal tooth; 7. an end cap; 8. a bolt; 9. pressing a plate; 10. positioning blocks; 11. framework oil seal; 12. a seal ring; 13. a trapezoidal block; 14. and (5) a compression block.

Detailed Description

As shown in fig. 1-2, a double sealing structure of a gear box comprises a main shaft 1, a shaft sleeve 2 assembled on the main shaft 1 and an end cover 7, wherein the end part of the shaft sleeve 2 is provided with a sealing ring 12, the surface of the main shaft 1 is provided with a spherical bulge 3, and the inner wall of the shaft sleeve 2 is provided with a spherical groove matched with the spherical bulge 3.

The combination position of the end cover 7 and the shaft sleeve 2 is provided with a sealing groove 5 and a sealing tooth 6 which are matched, and a gap is arranged between the sealing groove 5 and the sealing tooth 6 and is 0.2mm-0.3 mm.

The double-sealing structure of the gearbox further comprises a pressing plate 9 pressed between the shaft sleeve 2 and the end cover 7, and the pressing plate 9 and the end cover 7 are locked through bolts 8.

The end cover 7 is provided with a trapezoidal step on one side opposite to the pressing plate 9, a trapezoidal block 13 clamped with the step is arranged on one side of the pressing plate 9, and the trapezoidal block 13 is fixed with the end cover 7 through a bolt 8.

A positioning block 10 and a positioning groove which are matched are arranged between the side wall of the end cover 7 and the pressing plate 9.

The shaft sleeve 2 is further provided with a pressing block 14, the bottom of the pressing block 14 is embedded in the shaft sleeve 2, the top of the pressing block 14 is protruded and is in contact with the outer side face of the pressing plate 9, and the bottom of the pressing plate 9 is pressed on the end cover 7.

A double sealing structure of a gear box also comprises a framework oil seal 11 arranged between an end cover 7 and a pressure plate 9; the device also comprises a backflow hole 4, and the backflow hole 4 is communicated with the gap.

As shown in fig. 1-2, the shaft sleeve 2 and the main shaft 1 are matched and fixed with the spherical groove through the spherical bulge 3, the shaft sleeve 2 and the end cover 7 are pressed tightly by the pressing plate 9, the trapezoidal block 13 of the pressing plate 9 is clamped on the end cover 7 and is fixed by the bolt 8, the assembly is convenient, and the bolt 8 arranged on the top avoids the influence on the sealing of the framework oil seal 11; the locating block 10 and the locating slot that clamp plate 9 and end cover 7 set up relatively realize the location when clamp plate 9 and end cover 7 assemble, the installation of being convenient for.

As shown in fig. 1-2, a double sealing structure of a gearbox is characterized in that a shaft sleeve 2 and an end cover 7 are combined with sealing teeth 6 through a sealing groove 5 to form an oil film gap so as to prevent lubricating oil from flowing to a sealing position of a pressure plate 9, so that the lubricating oil flows back into a box body along a return hole 4 through the sealing groove 5, and the double sealing structure of the gearbox is good in sealing performance and not easy to leak; secondly, compress tightly end cover 7 and axle sleeve 2 through clamp plate 9, dustproof and waterproof, inside the effectual dust of avoiding enters into the box, realize double seal, sealed effectual.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double sealing structure of a gear box is characterized by comprising a main shaft, a shaft sleeve and an end cover, wherein the shaft sleeve and the end cover are assembled on the main shaft; a sealing groove and a sealing tooth which are matched are arranged at the joint position of the end cover and the shaft sleeve, and a gap is formed between the sealing groove and the sealing tooth;

2. The gearbox double seal structure of claim 1, wherein a matching locating block and locating slot are provided between the side wall of the end cover and the pressure plate.

3. The double sealing structure of the gearbox according to claim 1, wherein a trapezoidal step is provided on a side of the end cover opposite to the pressure plate, a trapezoidal block engaged with the step is provided on a side of the pressure plate, and the trapezoidal block and the end cover are fixed by bolts.

4. The double sealing structure of the gearbox according to claim 1, wherein a pressing block is further arranged on the shaft sleeve, the bottom of the pressing block is embedded in the shaft sleeve, and the top of the pressing block protrudes and contacts with the outer side face of the pressing plate.

5. A gearbox double seal structure according to claim 1, characterized in that said clearance is 0.2mm-0.3 mm.

6. A gearbox double seal structure according to claim 1, further comprising a skeleton oil seal provided between said end cover and said pressure plate.

7. A gearbox double seal structure according to claim 1, further comprising a return bore, said return bore communicating with said gap.