CN219755346U - Oil seal structure suitable for combine thrust wheel - Google Patents

Abstract

The utility model discloses an oil seal structure suitable for a supporting wheel of a combine harvester, which comprises a supporting wheel body, wherein both sides of the inside of a cavity are respectively provided with an air bag adjusting mechanism, both sides of the inner wall of the cavity are respectively sleeved with a bearing sleeve through the air bag adjusting mechanisms, the outer sides of the bearing sleeves are respectively sleeved with a corresponding oil seal mechanism, the inside of the cavity is respectively provided with a supporting wheel shaft through the bearing sleeves and the oil seal mechanisms, both sides of the supporting wheel shaft are respectively provided with a first bolt opening, both ends of the supporting wheel body are respectively provided with a corresponding cover plate, and the inner walls of the cover plates are respectively provided with a buffer protection mechanism corresponding to the oil seal mechanisms. The volume of the annular air bags can be controlled by inflating the annular air bags through the annular air bags arranged in the air bag collecting and adjusting mechanism on the two sides of the inner cavity of the thrust wheel body, the degree of extrusion of the annular air bags to the oil seal mechanism and the thrust wheel shaft is regulated, the sealing performance is ensured after friction consumption on the outer side of the oil seal, and the influence on the bonding degree of the thrust wheel shafts on the two sides of the thrust wheel is avoided.

Description

Oil seal structure suitable for combine thrust wheel

Technical Field

The utility model relates to the field of supporting wheels, in particular to an oil seal structure suitable for a supporting wheel of a combine harvester.

Background

The grain combine harvester is called as conbyin at the beginning of 50 s, and can complete the procedures of harvesting, threshing, separating stems, removing residues and the like of the grain crops at one time, and directly obtain grains from the field;

the supporting wheel is a part of the chassis part of the combine harvester, and is used for transmitting the net weight of the combine harvester, the weight of harvested grains, fuel oil and the like to the track, and the sleeve bears the pre-compression force of the bolts and the counter pressure of the bent wheel shaft, so that the compression section of the sleeve is reduced, the groove part of the sleeve is easy to deform under compression, the groove height is reduced, and the sealing effect and the whole service life of the sealing device are reduced.

The application publication number is CN 114212158A's chinese patent discloses a thrust wheel, it includes the thrust wheel body, the thrust wheel end cover, a first bearing, the thrust wheel spacer bush, the second bearing, the seal cover, the oil blanket, the shield, the thrust wheel axle, the axle sleeve, the oil seal cover, muddy water oil blanket, fixing bolt and gasket, set up thrust wheel end cover in the first end of thrust wheel body, can seal first bearing and the second bearing in the thrust wheel in, set up the seal cover in the second end of thrust wheel body, oil blanket and shield, can seal first bearing and second bearing in the second end of follow thrust wheel body, through with seal cover and shield with the oil blanket protection in, can also prolong the life of oil blanket.

For above-mentioned problem, current patent gives the solution, but the seal cover that its set up can not tighten up with the oil blanket and adjust, has damage and friction consumption in its oil blanket outside in thrust wheel course of working, leads to the sealing performance of oil blanket inner wall to become poor, and influences the laminating degree of thrust wheel both sides thrust wheel axle.

Therefore, an oil seal structure suitable for the supporting wheel of the combine harvester is provided.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model aims to provide an oil seal structure which can be suitable for a supporting wheel of a combine harvester and can be used for tightening and adjusting.

In order to solve the problems, the utility model adopts the following technical scheme.

The utility model provides an oil blanket structure suitable for combine thrust wheel, includes the thrust wheel body, the internally mounted of the thrust wheel body has the content cavity, the inside both sides of content cavity all install gasbag receipts and transfer the mechanism, the content cavity inner wall both sides are passed through the gasbag receives and transfers the mechanism and all overlap the bearing housing, the outside of bearing housing all overlaps and has corresponding oil blanket mechanism, the inside of content cavity passes through the bearing housing, oil blanket mechanism inserts and installs the thrust wheel axle, first bolt mouth is all installed to the both sides of thrust wheel axle, the apron that corresponds is all installed at the both ends of the thrust wheel body, the inner wall of apron all install with the buffer protection mechanism that oil blanket mechanism corresponds, the intermediate position side of apron all is provided with the second bolt mouth, the inside of second bolt mouth all inserts the bolt pole, the bolt pole with first bolt mouth corresponds the upside of bolt pole all is provided with first positioning socket, the side all be provided with first positioning socket, the side all be provided with inside and outside with the apron and second positioning socket corresponding the extension sleeve bolt of apron and the extension sleeve all corresponding the inside and the extension bolt cover of apron.

The bearing sleeve, the bearing wheel shaft and the cover plate are all inherent structures of the existing bearing wheel.

Further, the gasbag is received and is transferred mechanism including install in the circular arc notch at the four side angles of interior cavity inner wall, the inside side of circular arc notch all is connected with the pivot, the equal movable mounting in bottom of pivot has a cover frame board, the side of cover frame board all is connected with corresponding U type collet, the inner wall of U type collet all is connected with unsmooth rubber coating.

Further, the upper surface of U type collets all is connected with the pinch plate, inlay the notch is all installed to content cavity inner wall bottom, it all installs sealed elasticity leather pad to inlay the inside of notch.

The gasket is an existing gasket construction that is used to provide an outwardly squeezing force.

Further, the air bag adjusting mechanism further comprises a support ring which is clamped and sleeved in the inner portion of the content cavity through the U-shaped sleeve clamp, the bottom of the support ring is connected with a disc shell, the inner portion of the disc shell is provided with a circular air bag, and the outer side of the circular air bag is provided with a corresponding first sealing interface.

Further, the oil seal mechanism comprises an outer sleeve frame sleeved inside the circular ring air bag, separating circular ring covers are connected to the two side positions in the middle of the inner wall of the outer sleeve frame, opposite round table annular sleeve gaskets are mounted on the two sides of the inner part of the separating circular ring covers, outer conical sealing lantern rings are connected to the two sides of the inner wall of the outer sleeve frame, and the outer conical sealing lantern rings correspond to the round table annular sleeve gaskets in a fitting mode.

Furthermore, the outer sides of the inner walls of the round platform annular gasket are connected with inner conical sealing lantern rings, and the side surfaces of the inner conical sealing lantern rings are connected with second expansion sealing rings.

Further, the inner side of the inner wall of the round platform ring sleeve gasket is connected with clamping grooves, the outer sides of the clamping grooves are connected with first expansion sealing rings, corresponding embedded air bags are installed in the clamping grooves, and expansion bags are connected to the two sides of the embedded air bags.

Further, the upper side of the embedded air bag is connected with a second sealing interface, and the surface of the outer sleeve frame is connected with a third sealing interface which corresponds to the inside and the outside of the second sealing interface.

Further, the buffering protection machanism including connect in the ring frame of apron inner wall, the intermediate layer groove is all installed to the inside of ring frame, the inner wall four side angular position sides in intermediate layer groove all are connected with inserts the frame, insert the inside of frame and all be provided with the card notch that corresponds.

Further, the inside of inserting the frame is all inserted through the card notch and is installed the circular arc picture peg, the surface of circular arc picture peg all is connected with biax sleeve board, the surface of biax sleeve board all movable mounting has corresponding attenuator, the outside of attenuator all is connected with ring rubber baffle.

Compared with the prior art, the utility model has the beneficial effects that:

(1) The annular air bags arranged in the air bag collecting and adjusting mechanism on the two sides of the inner cavity of the thrust wheel body can be controlled by inflating in maintenance work, the degree of extrusion of the oil seal mechanism and the thrust wheel shaft is adjusted, sealing performance can be guaranteed after friction consumption on the outer side of the oil seal, and the lamination degree of the thrust wheel shafts on the two sides of the thrust wheel is effectively prevented from being influenced.

(2) The frame plate arranged through the arc notch in the air bag collecting and adjusting mechanism can be used for assembling and disassembling the support ring in a back-and-forth rotating manner, so that the workload of subsequently disassembling the inner air bag collecting and adjusting mechanism and the oil seal mechanism is greatly saved, the protection strength of the air bag module can be further improved by utilizing the disc shell arranged outside the circular air bag, and the stability of the inner wall sealing module of the combine harvester in the working process of severe environment is ensured.

(3) The separation tightening design of the round platform annular gaskets at the two sides and the outer conical sealing lantern ring in the outer sleeve frame of the oil seal mechanism is utilized, the degree that the two groups of round platform annular gaskets extrude the outer conical sealing lantern ring can be adjusted by controlling the inflation amount in the embedded air bag, the stretching length of the round platform annular gaskets is controlled, the sealing degree of the inner wall of the inner conical sealing lantern ring can be quickly adjusted, the fitting degree of the inner conical sealing lantern ring is increased, the practicability and the service life of the oil seal mechanism are prolonged, and the assembling and replacing frequency is reduced.

(4) Through the inserted frame of installation in the inside ring frame of buffering protection machanism, can conveniently dismantle with the installation ring rubber baffle, utilize the attenuator of the inside four sides installation of ring rubber baffle to carry out the shock attenuation when the impact is met to the external side of thrust wheel, very big improvement the anticollision performance of inner wall oil blanket mechanism, further improve its inside seal module's life, guarantee the laminating degree of apron and inner wall element in the course of the work simultaneously, improve inner structure's stability.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram showing the assembly effect of the thrust wheel of the present utility model;

FIG. 3 is a schematic diagram showing the splitting effect of the air bag adjusting mechanism of the present utility model;

FIG. 4 is an enlarged schematic view of the structure of FIG. 3 at A;

FIG. 5 is a schematic view of an oil seal mechanism according to the present utility model;

FIG. 6 is a schematic diagram illustrating the disassembly of the oil seal mechanism of the present utility model;

fig. 7 is a schematic structural diagram of a buffering protection mechanism of the present utility model.

The reference numerals in the figures illustrate:

1. a thrust wheel body; 2. a content cavity; 3. an air bag adjusting mechanism; 31. arc notch; 32. a support shaft; 33. a frame plate; 34. a U-shaped jacket clamp; 35. a buckle plate; 36. a notch; 37. sealing the elastic leather pad; 38. a stent ring; 39. a disc housing; 310. a circular ring air bag; 311. a first sealing interface; 4. a bearing sleeve; 5. a thrust wheel shaft; 6. a first latch opening; 7. an oil seal mechanism; 71. a jacket frame; 72. a separating annular cover; 73. round table ring sleeve pad; 74. a clamping groove; 75. a first expansion seal ring; 76. an inner conical sealing collar; 77. a second expansion seal ring; 78. an outer conical sealing collar; 79. an air bag is embedded in the air bag; 710. expanding the bag; 711. a second sealing interface; 712. a third sealing interface; 8. a buffer protection mechanism; 81. a circular ring frame; 82. an interlayer groove; 83. inserting a frame; 84. a clamping notch; 85. arc plugboards; 86. a double-shaft sleeve plate; 87. a damper; 88. a circular ring rubber separator; 9. a cover plate; 10. a second latch opening; 11. a latch rod; 12. a first positioning socket; 13. a second positioning socket; 14. a bolt sleeve; 15. reserving a sleeve opening; 16. expanding a bolt rod;

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.

Referring to fig. 1 to 7, an oil seal structure suitable for a supporting wheel of a combine harvester comprises a supporting wheel body 1, and is characterized in that: the inside mounting of thrust wheel body 1 has content cavity 2, gasbag receipts adjustment mechanism 3 are all installed to the inside both sides of content cavity 2, content cavity 2 inner wall both sides are passed through gasbag receipts adjustment mechanism 3 all overlaps to have bearing housing 4, the outside of bearing housing 4 all overlaps to have corresponding oil blanket mechanism 7, the inside of content cavity 2 passes through bearing housing 4 oil blanket mechanism 7 inserts and installs thrust wheel axle 5, first bolt mouth 6 is all installed to thrust wheel axle 5's both sides, the apron 9 that corresponds is all installed at thrust wheel body 1's both ends, apron 9's inner wall all install with the buffer protection mechanism 8 that oil blanket mechanism 7 corresponds, the intermediate position side of apron 9 all is provided with second bolt mouth 10, the inside of second bolt mouth 10 all inserts bolt 11, bolt 11 with first bolt mouth 6 corresponds, the upside of bolt 11 all is provided with first location socket 12, apron 9's side all installs corresponding apron 12 with second bolt mouth 13 is all reserved to the inside of cover 13 and is installed to first bolt mouth 6's inside of corresponding socket 12.

The bearing wheel body 1 is of an existing bearing wheel outer body structure, the whole bearing wheel body is of a hot rolled steel plate structure, and the bearing sleeve 4, the bearing wheel shaft 5 and the cover plate 9 which are inserted and installed on the inner wall of the cavity 2 are of an inherent structure of the existing bearing wheel.

As shown in fig. 1, the air bag adjusting mechanism 3 includes an arc notch 31 mounted at four corners of an inner wall of the inner cavity 2, a support shaft 32 is connected to an inner side surface of the arc notch 31, a frame plate 33 is movably mounted at a bottom of the support shaft 32, a corresponding U-shaped sleeve clamp 34 is connected to a side surface of the frame plate 33, and an uneven rubber coating is connected to an inner wall of the U-shaped sleeve clamp 34.

As shown in fig. 1, the upper surfaces of the U-shaped clips 34 are respectively connected with a buckle plate 35, the bottoms of the inner walls of the inner cavities 2 are respectively provided with a notch 36, and the interiors of the notch 36 are respectively provided with a sealing elastic leather pad 37.

The gasket 37 is an existing gasket construction that is used to provide an outwardly squeezing force.

As shown in fig. 1, the air bag adjusting mechanism 3 further includes a support ring 38 that is clamped and sleeved inside the content cavity 2 by the U-shaped sleeve clamp 34, the bottom of the support ring 38 is connected with a disc shell 39, a circular air bag 310 is installed inside the disc shell 39, and a corresponding first sealing interface 311 is installed outside the circular air bag 310.

Through adopting above-mentioned technical scheme, the problem that sealing sleeve and oil blanket of thrust wheel can not tighten up the regulation among the prior art has been solved, firstly, through inserting bearing bush 4 in the content cavity 2 of thrust wheel body 1 both sides, insert sealed elastic leather pad 37 in the internally mounted of embedded slot 36, then insert disc shell 39 inwards under sealed elastic leather pad 37's extrusion effect, the movable action of pivot 32 and cover plate 33 is utilized again, can follow the inside of circular arc notch 31 and rotate out U type cover clamp 34, can fast fixed ring air bag 310 by utilizing the cover relation of U type cover clamp 34 and support ring 38, then under the extrusion effect of oil blanket mechanism 7 and gasbag receipts adjustment mechanism 3, insert thrust wheel axle 5 in the inside of bearing bush 4, install apron 9 respectively corresponding both sides, insert bolt bar 11 in the second bolt mouth 10 on apron 9 surface, the bottom of bolt bar 11 inserts in the first bolt mouth 6 of bolt axle 5 both sides, can seal ring air bag 310 is installed through the corresponding side face-to the corresponding side face of apron 9 and seal groove hole 13, can be adjusted through the corresponding annular flange plate 13 with the corresponding installation hole 13, can be adjusted the sealing sleeve inner wall 310 through the sealing sleeve inner wall of a certain jack 13, can be adjusted, the degree of sealing sleeve inner wall of sealing sleeve can be changed, can be realized, and the sealing sleeve inner wall of sealing sleeve 310 is adjusted, can be adjusted through the sealing sleeve inner wall of sealing sleeve 13 is equipped with the corresponding annular sleeve 13, the sealing sleeve 13, the problem can be adjusted, can be adjusted.

As shown in fig. 1, the oil seal mechanism 7 includes an outer casing 71 sleeved inside the circular air bag 310, two side positions in the middle of the inner wall of the outer casing 71 are respectively connected with a separation circular ring cover 72, two opposite circular truncated cone ring gaskets 73 are installed on two sides of the inner part of the separation circular ring cover 72, two sides of the inner wall of the outer casing 71 are respectively connected with an outer cone sealing collar 78, and the outer cone sealing collars 78 are attached to and correspond to the circular truncated cone ring gaskets 73.

As shown in fig. 1, an inner conical sealing collar 76 is connected to the outer side of the inner wall of the circular truncated cone collar pad 73, and a second expansion sealing ring 77 is connected to the side surface of the inner conical sealing collar 76.

As shown in fig. 1, the inner sides of the inner walls of the circular truncated cone-shaped ring sleeve gaskets 73 are respectively connected with a clamping groove 74, the outer sides of the clamping grooves 74 are respectively connected with a first expansion sealing ring 75, corresponding embedded air bags 79 are respectively installed in the clamping grooves 74, and expansion bags 710 are respectively connected to the two sides of the embedded air bags 79.

As shown in fig. 1, a second sealing interface 711 is connected to the upper side of the embedded airbag 79, and a third sealing interface 712 corresponding to the inside and outside of the second sealing interface 711 is connected to the surface of the outer jacket frame 71.

By adopting the above technical scheme, the problem that the sealing sleeve and the oil seal of the thrust wheel in the prior art cannot be tightened and adjusted is solved, firstly, the oil seal mechanism 7 is tightened through the air bag tightening and adjusting mechanism 3, then the third sealing interface 712 at the outer side of the outer sleeve 71 inflates the inner embedded air bag 79, the inflated air can pass through the inside of the expansion bag 710, the volume of the expansion bag 710 is changed, the circular truncated cone annular gasket 73 at the outer sides of the clamping grooves 74 can be extruded, and the circular truncated cone annular gasket 73 and the outer conical sealing collar 78 are separated, the circular truncated cone annular gasket 73 can be tightened under the inner and outer double-layer extrusion action, the sealing degree of the inner wall of the oil seal mechanism 7 can be adjusted by changing the inner and outer intervals of the inner conical sealing collar 76 and the outer conical sealing collar 78, the bonding degree of the oil seal mechanism 7 to the bearing sleeve 4 and the thrust wheel shaft 5 is changed, the oil seal mechanism can be extruded continuously when the outer friction is consumed to a certain degree, the sealing performance is ensured, and the bonding degree of the thrust wheel shafts 5 at the two sides of the thrust wheel is effectively prevented from being influenced.

As shown in fig. 1, the buffer protection mechanism 8 includes a ring frame 81 connected to the inner wall of the cover plate 9, an interlayer slot 82 is installed in the ring frame 81, inserting frames 83 are connected to the four side angular position sides of the inner wall of the interlayer slot 82, and corresponding clamping slots 84 are provided in the inserting frames 83.

As shown in fig. 1, the inside of the insertion frame 83 is provided with an arc insertion plate 85 through the clamping slots 84, the outer surface of the arc insertion plate 85 is connected with a double-shaft sleeve plate 86, the outer surface of the double-shaft sleeve plate 86 is movably provided with a corresponding damper 87, and the outer side of the damper 87 is connected with a circular ring rubber partition 88.

Through adopting above-mentioned technical scheme, the problem that its thrust wheel does not have corresponding shock attenuation safeguard function when the work is suffered the striking under abominable environment among the prior art, insert the inserted frame 83 that ring frame 81 inner wall intermediate layer groove 82 four sides are connected through circular arc picture peg 85 at first, through the biax swing joint relation of biax sleeve board 86 in the inserting process, can adjust the inclination of circular arc picture peg 85, further conveniently insert the installation, utilize the attenuator 87 of the circular arc picture peg 85 outside of inserting the installation, the ring rubber baffle 88 of cooperation surface connection, can be under the prerequisite of not interfering thrust wheel axle 5 pivoted, the oil blanket mechanism 7 of laminating inner wall ring rubber baffle 88, the bearing housing 4 carries out shock attenuation safeguard, when the apron 9 of thrust wheel body 1 both sides is suffered the striking, through the buffering cushioning effect of attenuator 87, can offset a large amount of impact time forces, very big improvement the anticollision performance of inner wall oil blanket mechanism 7, further improve the life of its inside seal module, guarantee the laminating degree of apron 9 and inner wall element in the course of working simultaneously, improve inner structure's stability.

Working principle: firstly, through inserting the bearing sleeve 4 at two sides in the inner cavity 2 of the thrust wheel body 1, installing the sealing elastic leather pad 37 in the embedded notch 36, then inserting the disc shell 39 inwards under the extrusion action of the sealing elastic leather pad 37, then utilizing the movable action of the supporting shaft 32 and the frame plate 33, rotating the U-shaped sleeve clamp 34 out of the circular arc notch 31, utilizing the nesting relation of the U-shaped sleeve clamp 34 and the bracket ring 38, rapidly fixing the circular ring air bag 310, then sleeving the corresponding oil seal mechanism 7 on the inner part of the circular ring air bag 310, inserting the thrust wheel shaft 5 in the bearing sleeve 4, inflating the embedded air bag 79 in the outer part of the outer sleeve frame 71 through the third sealing interface 712, changing the volume of the expansion bag 710 through the inner part of the expansion bag 710, namely, extruding the circular table sleeve gasket 73 outside the clamping groove 74 to two sides, and tightening the circular cone sleeve gasket 73 under the inner and outer double-layer extrusion action, namely tightening the circular cone gasket 73 under the inner and outer double-layer extrusion action, then inserting the corresponding conical sleeve gasket 76 into the corresponding bolt shaft 7 on the two sides of the inner sleeve 11, changing the degree of the sealing sleeve gasket 7 on the side face of the second side face of the sealing cover plate 11, and the bolt 11, respectively, inserting the bolt 11 on the two side faces of the sealing sleeve 7 on the two side faces of the inner side face of the sealing cover plate 11, and the bolt 11, respectively, by changing the degree of the corresponding bolt 11, and finally, the expansion bolt rod 16 is arranged in the reserved sleeve opening 15 in a lifting way, and is correspondingly arranged with the bottom driving crawler belt of the combine harvester.

The above description is only of the preferred embodiments of the present utility model; the scope of the utility model is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present utility model, and the technical solution and the improvement thereof are all covered by the protection scope of the present utility model.

Claims (10)

1. The utility model provides an oil blanket structure suitable for combine thrust wheel, includes thrust wheel body (1), its characterized in that: the bearing wheel is characterized in that a content cavity (2) is arranged in the bearing wheel body (1), air bag collecting and adjusting mechanisms (3) are arranged on two sides of the interior of the content cavity (2), bearing sleeves (4) are sleeved on two sides of the inner wall of the content cavity (2) through the air bag collecting and adjusting mechanisms (3), corresponding oil seal mechanisms (7) are sleeved on the outer sides of the bearing sleeves (4), a bearing wheel shaft (5) is inserted and arranged in the interior of the content cavity (2) through the bearing sleeves (4) and the oil seal mechanisms (7), first plug pin openings (6) are arranged on two sides of the bearing wheel shaft (5), and corresponding cover plates (9) are arranged on two ends of the bearing wheel body (1);

the inner wall of apron (9) all install with buffer protection mechanism (8) that oil blanket mechanism (7) corresponds, the intermediate position side of apron (9) all is provided with second bolt mouth (10), bolt pole (11) have all been inserted to the inside of second bolt mouth (10), bolt pole (11) with first bolt mouth (6) correspond, the upside of bolt pole (11) all is provided with first location socket (12), the side of apron (9) all be provided with second location socket (13) that first location socket (12) inside and outside correspond, bolt cover (14) that second location socket (13) inside all install with first location socket (12) correspond, extension bolt pole (16) that correspond with combine bottom drive track are all installed to the inside of reservation sleeve mouth (15) in the both sides of apron (9).

2. An oil seal structure for a combine thrust wheel according to claim 1, wherein: the air bag adjusting mechanism (3) comprises arc notch (31) arranged at four side angles of the inner wall of the inner cavity (2), support shafts (32) are connected to the inner side faces of the arc notch (31), a frame plate (33) is movably arranged at the bottom of each support shaft (32), corresponding U-shaped sleeve clamps (34) are connected to the side faces of the frame plate (33), and concave-convex rubber coatings are connected to the inner walls of the U-shaped sleeve clamps (34).

3. An oil seal structure for a combine thrust wheel according to claim 2, wherein: the upper surface of U type collets (34) all is connected with and changes buckle (35), inlay notch (36) are all installed to content cavity (2) inner wall bottom, seal elastic leather pad (37) are all installed to the inside of inlay notch (36).

4. An oil seal structure for a combine thrust wheel according to claim 3, wherein: the air bag adjusting mechanism (3) further comprises a support ring (38) which is clamped and sleeved inside the content cavity (2) through the U-shaped sleeve clamp (34), the bottom of the support ring (38) is connected with a disc shell (39), a circular air bag (310) is arranged inside the disc shell (39), and a corresponding first sealing interface (311) is arranged on the outer side of the circular air bag (310).

5. The oil seal structure for a supporting wheel of a combine harvester according to claim 4, wherein: the oil seal mechanism (7) comprises an outer sleeve frame (71) sleeved inside the circular ring air bag (310), separation circular ring covers (72) are connected to two side positions in the middle of the inner wall of the outer sleeve frame (71), opposite circular table annular sleeve gaskets (73) are arranged on two sides of the inner part of the separation circular ring covers (72), outer conical sealing lantern rings (78) are connected to two sides of the inner wall of the outer sleeve frame (71), and the outer conical sealing lantern rings (78) correspond to the circular table annular sleeve gaskets (73) in a fitting mode.

6. The oil seal structure for a supporting wheel of a combine harvester according to claim 5, wherein: the inner sides of the inner walls of the round platform annular gasket (73) are respectively connected with an inner conical sealing collar (76), and the side surfaces of the inner conical sealing collars (76) are respectively connected with a second expansion sealing ring (77).

7. The oil seal structure for a supporting wheel of a combine harvester according to claim 5, wherein: the inner side of the inner wall of the round table annular sleeve gasket (73) is connected with clamping grooves (74), the outer sides of the clamping grooves (74) are connected with first expansion sealing rings (75), corresponding embedded air bags (79) are arranged in the clamping grooves (74), and expansion bags (710) are connected to two sides of each embedded air bag (79).

8. The oil seal structure for a supporting wheel of a combine harvester according to claim 7, wherein: the upper side of the embedded air bag (79) is connected with a second sealing interface (711), and the surface of the outer sleeve frame (71) is connected with a third sealing interface (712) corresponding to the inside and the outside of the second sealing interface (711).

9. An oil seal structure for a combine thrust wheel according to claim 1, wherein: buffer protection mechanism (8) including connect in ring frame (81) of apron (9) inner wall, intermediate layer groove (82) are all installed to the inside of ring frame (81), the inner wall four side angular position sides of intermediate layer groove (82) all are connected with insert frame (83), the inside of inserting frame (83) all is provided with corresponding card notch (84).

10. An oil seal structure for a combine thrust wheel according to claim 9, wherein: the inside of inserting frame (83) is passed through card notch (84) all inserts and installs circular arc picture peg (85), the surface of circular arc picture peg (85) all is connected with biax sleeve plate (86), the surface of biax sleeve plate (86) all movable mounting has corresponding attenuator (87), the outside of attenuator (87) all is connected with ring rubber baffle (88).