CN218177879U

CN218177879U - Sealing structure of tractor front drive axle sun wheel shaft

Info

Publication number: CN218177879U
Application number: CN202222245992.7U
Authority: CN
Inventors: 颜世强; 李山; 王莹; 李轩; 肖法厅; 宋向阳; 吴丽丽; 苑婷婷; 薛艺
Original assignee: Shandong Gahead Drive Tech Co ltd
Current assignee: Shandong Gahead Drive Tech Co ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-12-30
Anticipated expiration: 2032-08-25

Abstract

The utility model discloses a seal structure of tractor front drive axle sun gear axle, the utility model relates to a sealed technical field, the casing has the inner chamber, the extending direction of inner chamber is the same with the length direction of casing, install the sun gear axle in the inner chamber, the inner wall of inner chamber is to the protruding ring channel that forms of outer wall of casing, install box-type oil blanket in the ring channel, box-type oil blanket includes inner circle and outer lane, the outer lane is located between inner circle and the ring channel bottom, the outer lane rotates with the inner circle to be connected, the sun gear axle passes the inner circle, the outer wall of sun gear axle is hugged closely to the inner wall of inner circle, the sun gear axle drives the inner circle and rotates. The inner ring is in contact with the outer wall of the sun gear shaft, the outer ring is fixed in the annular groove, the inner ring and the outer ring can rotate freely, the inner ring rotates along with the sun gear shaft, the inner ring and the outer ring rotate mutually in the operation process, the inner ring and the sun gear shaft do not move mutually, and the sun gear shaft cannot be abraded to cause leakage of an oil seal.

Description

Sealing structure of tractor front drive axle sun wheel shaft

Technical Field

The utility model relates to a sealed technical field, specifically speaking relates to a seal structure of tractor front drive axle sun gear axle.

Background

The high-horsepower four-wheel drive tractor is widely applied to agricultural machinery, the front drive axle is used as an important component of a tractor chassis and plays an important role in farming, and the front drive axle is mainly used for transmitting power from an engine to tires through a gearbox and a transfer case and playing a role in driving.

However, when the existing front drive axle works in regions with large wind and sand such as Xinjiang and inner Mongolia, the phenomenon of oil leakage of the oil seal on the sun gear shaft at the wheel edge part of the drive axle often occurs, and the abrasion to the sun gear shaft after the oil seal fails is serious, so that the sun gear shaft and the oil seal need to be replaced together during replacement, and the resource is greatly wasted.

Therefore, how to provide a reliable and convenient-to-maintain sealing structure constitutes the problem which needs to be solved urgently by the front drive axle of the tractor at present.

Disclosure of Invention

To above defect, the utility model aims at providing a seal structure of tractor front drive axle sun gear axle aims at solving the problem of oil blanket oil leak among the prior art.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a seal structure of tractor front drive axle sun gear axle, includes the casing, the casing has the inner chamber, the extending direction of inner chamber is the same with the length direction of casing, install the sun gear axle in the inner chamber, the inner wall of inner chamber is protruding to form the ring channel to the outer wall of casing, install box-type oil blanket in the ring channel, box-type oil blanket includes inner circle and outer lane, the outer lane is located between inner circle and the ring channel bottom, the outer lane is connected with the inner circle rotation, the sun gear axle passes the inner circle, the outer wall of sun gear axle is hugged closely to the inner wall of inner circle, the sun gear axle drives the inner circle and rotates.

The end, far away from the annular groove, of the shell is covered with a fluted disc, the fluted disc comprises a plurality of positioning holes, one end, facing the fluted disc, of the shell comprises a plurality of limiting holes, the positioning holes correspond to the limiting holes in a one-to-one mode, one end of each limiting hole is connected with one surface, facing the fluted disc, of the shell, the other end of each limiting hole extends towards the annular groove, and the limiting holes are arranged around the sun wheel shaft; the positioning hole is formed in the bottom of the limiting hole, the bolt is connected with the shaft sleeve in a threaded mode, and the positioning hole is formed in the bottom of the limiting hole.

The inner cavity is further internally provided with a bearing, the bearing is positioned between the box-type oil seal and the fluted disc, the sun gear shaft penetrates through an inner ring layer of the bearing, and an elastic check ring is arranged between an outer ring layer of the bearing and the inner cavity.

The outer gasket is located on one face, far away from the box-type oil seal, of the fluted disc, the inner gasket is located on one face, far away from the fluted disc, of the outer gasket, the second elastic check ring is located on one face, far away from the outer gasket, of the inner gasket, and the outer gasket, the inner gasket and the second elastic check ring are arranged around the sun gear shaft.

The outer washer comprises an outer tooth part, and the outer tooth part is located between the shaft sleeve and the fluted disc.

The inner wall of the inner gasket is provided with an inner tooth part, the outer wall of the sun wheel shaft is provided with a gear structure, and the inner tooth part is meshed with the gear structure.

After the technical scheme is adopted, the beneficial effects of the utility model are that:

the inner ring is in contact with the outer wall of the sun gear shaft, the outer ring is fixed in the annular groove, the inner ring and the outer ring can rotate freely, the inner ring rotates along with the sun gear shaft, in the operation process, the inner ring and the outer ring rotate mutually, the inner ring and the sun gear shaft do not move mutually, and the sun gear shaft cannot be abraded to cause leakage of an oil seal.

Drawings

FIG. 1 is a structural view of a seal structure;

fig. 2 is a structural view of the cartridge type oil seal;

FIG. 3 is a side view of the seal structure;

fig. 4 is a side view of the inner gasket.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The position that involves in this specification all uses the position of the utility model discloses a seal structure of tractor front drive axle sun gear axle when normal operating is the standard, does not restrict its position when saving and transporting, only represents relative position relation, does not represent absolute position relation.

Referring to fig. 1-4, a sealing structure for a sun gear shaft of a front drive axle of a tractor comprises a housing 1, wherein the housing 1 is provided with an inner cavity, the extension direction of the inner cavity is the same as the length direction of the housing 1, a sun gear shaft 11 is installed in the inner cavity, the inner wall of the inner cavity protrudes towards the outer wall of the housing to form an annular groove, a box-type oil seal 2 is installed in the annular groove, the box-type oil seal 2 comprises an inner ring 12 and an outer ring 13, the outer ring 13 is located between the inner ring 12 and the bottom of the annular groove, the outer ring 13 is rotatably connected with the inner ring 12, the sun gear shaft 11 penetrates through the inner ring 12, the inner wall of the inner ring 12 is tightly attached to the outer wall of the sun gear shaft 11, and the sun gear shaft 11 drives the inner ring 12 to rotate. The inner ring 12 is in contact with the outer wall of the sun gear shaft 11, the outer ring 13 is fixed in the annular groove, the inner ring 12 and the outer ring 13 can rotate freely, the inner ring 12 rotates along with the sun gear shaft 11, the inner ring 12 and the outer ring 13 rotate mutually in the operation process, no mutual movement exists between the inner ring 12 and the sun gear shaft 11, and the sun gear shaft 11 cannot be abraded to cause oil seal leakage.

In order to seal the shell 1, preferably, a fluted disc 7 covers one end of the shell 1, which is far away from the annular groove, the fluted disc 7 comprises a plurality of positioning holes, one end of the shell 1, which faces the fluted disc 7, comprises a plurality of limiting holes, the positioning holes correspond to the limiting holes one to one, one end of each limiting hole is connected with one surface of the shell 1, which faces the fluted disc 7, the other end of each limiting hole extends towards the annular groove, and the limiting holes are arranged around the sun gear shaft 11; the positioning structure is characterized by further comprising a bolt 5 and a shaft sleeve 6, one end of the shaft sleeve 6 covers the positioning hole, the other end of the shaft sleeve 6 extends along the length direction of the limiting hole, and the bolt 5 is in threaded connection with the shaft sleeve 6. Due to the design, the fluted disc 7 is tightly fixed at one end of the shell 1 by the bolt 5 and the shaft sleeve 6, and the problem that the sun wheel shaft 11 falls off is avoided.

In order to facilitate the axial positioning of the sun wheel shaft 11, preferably, a bearing 4 is further installed inside the inner cavity, the bearing 4 is located between the box-type oil seal 2 and the fluted disc 7, the sun wheel shaft 11 penetrates through an inner ring of the bearing 4, and an elastic retainer ring 3 is arranged between an outer ring of the bearing 4 and the inner cavity. The elastic retainer ring 3 realizes the axial positioning of the bearing 4, and the bearing 4 ensures the axial positioning of the sun gear shaft 11.

In order to further seal the housing 1, it is preferable that the housing further includes an outer gasket 8, an inner gasket 9, and a second circlip 10, where the outer gasket 8 is located on a side of the fluted disc 7 away from the cassette oil seal 2, the inner gasket 9 is located on a side of the outer gasket 8 away from the fluted disc 7, the second circlip 10 is located on a side of the inner gasket 9 away from the outer gasket 8, and the outer gasket 8, the inner gasket 9, and the second circlip 10 are all disposed around the sun gear shaft 11. The outer gasket 8, the inner gasket 9 and the second elastic retainer ring 10 seal the shell 1 and ensure the axial positioning of the sun gear shaft 11.

In order to avoid the outer disk 8 from following the sun gear shaft 11, the outer disk 8 preferably comprises an outer toothing, which is located between the sleeve 6 and the toothed disk 7.

The inner wall of the inner gasket 9 is provided with an inner tooth part, the outer wall of the sun gear shaft 11 is provided with a gear structure, and the inner tooth part is meshed with the gear structure. This design allows the inner washer 9 to follow the rotation of the sun gear shaft 11.

The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.

Claims

1. The utility model provides a seal structure of tractor front drive axle sun gear axle, includes the casing, the casing has the inner chamber, the extending direction of inner chamber is the same with the length direction of casing, its characterized in that: the inner cavity is internally provided with a sun wheel shaft, the inner wall of the inner cavity protrudes towards the outer wall of the shell to form an annular groove, a box-shaped oil seal is arranged in the annular groove and comprises an inner ring and an outer ring, the outer ring is positioned between the inner ring and the bottom of the annular groove, the outer ring is rotatably connected with the inner ring, the sun wheel shaft penetrates through the inner ring, the inner wall of the inner ring is tightly attached to the outer wall of the sun wheel shaft, and the sun wheel shaft drives the inner ring to rotate.

2. The sealing structure of the tractor front drive axle sun gear shaft according to claim 1, characterized in that: a fluted disc covers one end of the shell, which is far away from the annular groove, the fluted disc comprises a plurality of positioning holes, one end of the shell, which faces the fluted disc, comprises a plurality of limiting holes, the positioning holes correspond to the limiting holes one by one, one end of each limiting hole is connected with one surface of the shell, which faces the fluted disc, the other end of each limiting hole extends towards the annular groove, and the limiting holes are arranged around the sun wheel shaft; the positioning hole is formed in the bottom of the limiting hole, the bolt is connected with the shaft sleeve in a threaded mode, and the positioning hole is formed in the bottom of the limiting hole.

3. The sealing structure of the tractor front drive axle sun gear shaft according to claim 2, characterized in that: the inner cavity is also internally provided with a bearing, the bearing is positioned between the box-type oil seal and the fluted disc, the sun gear shaft penetrates through an inner ring layer of the bearing, and an elastic check ring is arranged between an outer ring layer of the bearing and the inner cavity.

4. The sealing structure of the tractor front drive axle sun gear shaft according to claim 2, characterized in that: still include outer packing ring, inner packing ring and second circlip, the outer packing ring is located the fluted disc and keeps away from the one side of box-type oil blanket, the inner packing ring is located the outer packing ring and keeps away from the one side of fluted disc, the second circlip is located the one side that the outer packing ring was kept away from to the inner packing ring, outer packing ring, inner packing ring and second circlip all set up around the sun gear axle.

5. The sealing structure of the tractor front drive axle sun gear shaft according to claim 4, characterized in that: the outer washer comprises an outer tooth part, and the outer tooth part is located between the shaft sleeve and the fluted disc.

6. The sealing structure of the tractor front drive axle sun gear shaft according to claim 4, characterized in that: the inner wall of the inner gasket is provided with an inner tooth part, the outer wall of the sun wheel shaft is provided with a gear structure, and the inner tooth part is meshed with the gear structure.