Sealing structure and gearbox

Abstract

The utility model relates to the technical field of gear boxes, and particularly discloses a sealing structure and a gear box. The sealing structure comprises a fixed component, a rotating component and a sealing assembly. The fixing component is provided with a first connecting part, and the first connecting part is provided with a first oil way; the rotating component is provided with a second connecting part, and the second connecting part is provided with a second oil way; the sealing assembly comprises a first sealing ring, a second sealing ring and a pressing ring located between the first sealing ring and the second sealing ring. Along the axial direction, the pressing ring provides axial support for the first sealing ring and the second sealing ring. In the radial direction, the first sealing ring and the second sealing ring abut against the second connecting part and are arranged at intervals with the first connecting part. Or the first sealing ring and the second sealing ring abut against the first connecting part, and the first sealing ring and the second sealing ring are arranged at intervals with the second connecting part. According to the sealing structure, the rotating component can be allowed to have large eccentricity relative to the fixed component, meanwhile, the leakage amount of lubricating oil can be reduced, and effective transmission of the lubricating oil is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear box technical field especially relates to a sealing structure and gear box. BACKGROUND

[0002] Gear box is a kind of basic transmission device, is widely used in various mechanical equipment, mainly for transmission and conversion power.In planetary gear structure, planetary gear bearing and sun gear meshing all need lubricating oil lubrication, lubricating oil is generally injected from the box, enters planetary carrier through internal passage.

[0003] In prior art, the sliding ring is arranged between the box and the planetary carrier, the sliding ring is sleeved on the inner wall of the box or the planetary carrier, the outer circumferential surface of the sliding ring has a small gap with the planetary carrier or the box, when the axis eccentricity between the box and the planetary carrier is small, the sliding ring can pass through the small gap design, on the basis of allowing lubricating oil to leak appropriately, the transmission of pressure lubricating oil from static parts to rotating parts is realized, but when the planetary carrier has a large eccentricity relative to the box, for example, when the eccentricity is more than 1mm, a large gap needs to be designed between the sliding ring and the planetary carrier to avoid interference between the two, thereby causing a large amount of lubricating oil leakage and failing to ensure the effective transmission of lubricating oil. SUMMARY

[0004] The utility model discloses a kind of sealing structure and gear box, can allow planetary carrier relative to box have larger eccentricity, simultaneously still can reduce the leakage of lubricating oil, ensure the effective transmission of lubricating oil.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] On the one hand, the utility model provides a kind of sealing structure, comprising:

[0007] Fixed component, the fixed component has first connecting portion, the first connecting portion is provided with first oil path;

[0008] Rotating component, the rotating component has second connecting portion, the second connecting portion is inserted with the first connecting portion, the second connecting portion is provided with second oil path;

[0009] Sealing assembly, sleeve between the first connecting portion and the second connecting portion, the sealing assembly includes first sealing ring, second sealing ring and the compression ring between the first sealing ring and the second sealing ring, the compression ring is provided with third oil path, both ends of the third oil path are communicated with the first oil path and the second oil path respectively;

[0010] Along the axial direction, the compression ring provides axial support to the first sealing ring and the second sealing ring;

[0011] The first sealing ring and the second sealing ring are in abutment with the second connecting part and spaced apart from the first connecting part in the radial direction, or the first sealing ring and the second sealing ring are in abutment with the first connecting part and spaced apart from the second connecting part in the radial direction.

[0012] As an optional solution of the sealing structure, the sealing assembly further comprises an elastic member, which is in elastic abutment between the first sealing ring and the compression ring, and / or in elastic abutment between the second sealing ring and the compression ring.

[0013] As an optional solution of the sealing structure, the first sealing ring and / or the second sealing ring and / or the compression ring is provided with a limiting groove, and part of the elastic member is embedded in the limiting groove.

[0014] As an optional solution of the sealing structure, the first sealing ring is provided with a first protruding part on the side facing the second sealing ring, the second sealing ring is provided with a second protruding part on the side facing the first sealing ring, and the compression ring is in abutment with the first protruding part and the second protruding part on one side in the radial direction.

[0015] As an optional solution of the sealing structure, the first protruding part and the second protruding part are both located between the compression ring and the first connecting part.

[0016] As an optional solution of the sealing structure, one of the first connecting part and the second connecting part is provided with a mounting groove, and the first sealing ring, the second sealing ring and the compression ring are all arranged in the mounting groove.

[0017] As an optional solution of the sealing structure, when the first connecting part is provided with the mounting groove, the first connecting part is detachably connected with a compression plate, and the first connecting part and the compression plate jointly form the mounting groove; when the second connecting part is provided with the mounting groove, the second connecting part is detachably connected with a compression plate, and the second connecting part and the compression plate jointly form the mounting groove.

[0018] As an optional solution of the sealing structure, the sealing structure further comprises a connecting member, the compression plate is provided with a pre-embedded groove, and the connecting member is connected to the first connecting part or the second connecting part through the pre-embedded groove.

[0019] As an optional solution of the sealing structure, a plurality of the second oil paths and a plurality of the third oil paths are provided, the plurality of the second oil paths are arranged in the circumferential direction of the rotating member, and the plurality of the third oil paths are arranged in the circumferential direction of the compression ring.

[0020] In another aspect, the utility model provides a kind of gear box, including the sealing structure as above, the fixed component is box, and the rotating component is planet carrier.

[0021] The utility model has the advantages of:

[0022] The sealing structure includes a fixed component, a rotating component, and a sealing assembly. The fixed component has a first connecting portion provided with a first oil passage. The rotating component has a second connecting portion inserted with the first connecting portion and provided with a second oil passage. The sealing assembly is disposed between the first connecting portion and the second connecting portion and includes a first sealing ring, a second sealing ring, and a press ring located between the first sealing ring and the second sealing ring. The press ring is provided with a third oil passage, and the two ends of the third oil passage are communicated with the first oil passage and the second oil passage, respectively. Thus, the lubricating oil in the first oil passage can enter the second oil passage through the third oil passage.

[0023] In the axial direction, the press ring provides axial support to the first sealing ring and the second sealing ring, so that the first sealing ring and the second sealing ring can abut against the first connecting portion or the second connecting portion, thereby forming a seal to prevent the lubricating oil from leaking. In the radial direction, the first sealing ring and the second sealing ring are both abutted against the second connecting portion and spaced apart from the first connecting portion. Thus, when the rotating component is eccentric relative to the fixed component, the first sealing ring and the second sealing ring can move accordingly. At this time, the gaps between the first sealing ring and the second connecting portion and between the second sealing ring and the second connecting portion are small, and the first sealing ring and the second sealing ring do not interfere with the fixed component. Alternatively, the first sealing ring and the second sealing ring are both abutted against the first connecting portion and spaced apart from the second connecting portion. Thus, when the rotating component is eccentric relative to the fixed component, the positions of the first sealing ring and the second sealing ring relative to the fixed component remain unchanged. At this time, the gaps between the first sealing ring and the first connecting portion and between the second sealing ring and the first connecting portion are small, and the first sealing ring and the second sealing ring do not interfere with the rotating component. The sealing structure can allow the rotating component to have a large eccentricity relative to the fixed component, while reducing the leakage of lubricating oil and ensuring the effective transmission of lubricating oil. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A sectional view of the sealing structure provided by the utility model embodiment;

[0025] Figure 2 A first partial sectional view of the sealing structure provided by the utility model embodiment;

[0026] Figure 3 A second partial sectional view of the sealing structure provided by the utility model embodiment;

[0027] Figure 4A first partial sectional view of another sealing structure provided by the utility model embodiment;

[0028] Figure 5 A second partial sectional view of another sealing structure provided by the utility model embodiment.

[0029] In the drawings:

[0030] 1, fixed component;11, first connecting part;111, first oil circuit;2, rotating component;21, second connecting part;211, second oil circuit;3, sealing assembly;31, first sealing ring;311, first protruding part;32, second sealing ring;321, second protruding part;33, pressing ring;331, third oil circuit;34, elastic piece;35, limiting groove;4, installation groove;5, pressing plate;51, pre-buried groove;6, connecting piece. Specific implementation

[0031] The technical scheme of the utility model will be described below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0032] In the description of the utility model, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the first feature is "above", "above" and "above" of the second feature, which includes the first feature above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" of the second feature, which includes the first feature below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication.For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0034] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout the description.The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0035] As Figures 1-5 The sealing structure comprises a fixed member 1, a rotating member 2 and a sealing assembly 3.

[0036] The fixed member 1 has a first connecting part 11, the first connecting part 11 is provided with a first oil channel 111, the rotating member 2 has a second connecting part 21, the second connecting part 21 is inserted with the first connecting part 11, and the second connecting part 21 is provided with a second oil channel 211, the sealing assembly 3 is sleeved between the first connecting part 11 and the second connecting part 21, and the sealing assembly 3 comprises a first sealing ring 31, a second sealing ring 32 and a pressing ring 33 located between the first sealing ring 31 and the second sealing ring 32, the pressing ring 33 is provided with a third oil channel 331, and the two ends of the third oil channel 331 are communicated with the first oil channel 111 and the second oil channel 211 respectively, so that the lubricating oil in the first oil channel 111 can enter the second oil channel 211 through the third oil channel 331.

[0037] The compression ring 33 provides axial support to the first sealing ring 31 and the second sealing ring 32 in the axial direction, so that the first sealing ring 31 and the second sealing ring 32 can abut against the first connecting portion 11 or the second connecting portion 21 to form a seal and prevent leakage of lubricating oil. In the radial direction, the first sealing ring 31 and the second sealing ring 32 are both arranged to abut against the second connecting portion 21 and be spaced apart from the first connecting portion 11, so that when the rotating member 2 is eccentric relative to the fixed member 1, the first sealing ring 31 and the second sealing ring 32 can move, at which time the gaps between the first sealing ring 31 and the second connecting portion 21 and between the second sealing ring 32 and the second connecting portion 21 are small, and the first sealing ring 31 and the second sealing ring 32 do not interfere with the fixed member 1; or the first sealing ring 31 and the second sealing ring 32 are both arranged to abut against the first connecting portion 11 and be spaced apart from the second connecting portion 21, so that when the rotating member 2 is eccentric relative to the fixed member 1, the first sealing ring 31 and the second sealing ring 32 do not move relative to the fixed member 1, at which time the gaps between the first sealing ring 31 and the first connecting portion 11 and between the second sealing ring 32 and the first connecting portion 11 are small, and the first sealing ring 31 and the second sealing ring 32 do not interfere with the rotating member 2.

[0038] The sealing structure can allow the rotating member 2 to have a large eccentricity relative to the fixed member 1, while also reducing the amount of leakage of lubricating oil and ensuring effective transmission of lubricating oil. Optionally, the first sealing ring 31 and the second sealing ring 32 are both nylon rings or polytetrafluoroethylene rings or metal rings, so that the first sealing ring 31 and the second sealing ring 32 can have certain anti-wear capabilities when they have a sealing effect, to prevent large amounts of leakage of lubricating oil due to wear.

[0039] As Figure 3 and Figure 5As shown, the sealing assembly 3 further comprises elastic members 34, which are in elastic abutment between the first sealing ring 31 and the compression ring 33, and / or in elastic abutment between the second sealing ring 32 and the compression ring 33. Through the arrangement of the elastic members 34, the first sealing ring 31 and the second sealing ring 32 can always be in sealing abutment with the first connecting portion 11 or the second connecting portion 21, so as to prevent a large gap from being generated between the first sealing ring 31 and the second sealing ring 32 and the first connecting portion 11 or the second connecting portion 21 due to installation errors or machining errors or eccentricity of the rotating member 2 relative to the fixed member 1, and thus avoid a large amount of lubricating oil from leaking. Optionally, the first sealing ring 31 and / or the second sealing ring 32 and / or the compression ring 33 is provided with a limiting groove 35, and part of the elastic members 34 is embedded in the limiting groove 35, so that the limiting groove 35 can limit the elastic members 34 to prevent the elastic members 34 from dislocating and causing the first sealing ring 31 and the second sealing ring 32 to fail. Further optionally, a plurality of elastic members 34 are provided to improve the elastic abutment capability.

[0040] As shown, Figures 2-5 The first sealing ring 31 is provided with a first protruding portion 311 on the side facing the second sealing ring 32, the second sealing ring 32 is provided with a second protruding portion 321 on the side facing the first sealing ring 31, and the compression ring 33 is in abutment with the first protruding portion 311 and the second protruding portion 321 along the radial direction, so that the compression ring 33 limits the first sealing ring 31 and the second sealing ring 32 along the radial direction, preventing unnecessary wear caused by the size expansion of the first sealing ring 31 and the second sealing ring 32 after the temperature rises.

[0041] The first protruding portion 311 and the second protruding portion 321 are both located between the compression ring 33 and the first connecting portion 11, and when the first sealing ring 31 and the second sealing ring 32 are both in abutment with the second connecting portion 21 and spaced apart from the first connecting portion 11, the compression ring 33 can limit the first protruding portion 311 and the second protruding portion 321, avoiding excessive size expansion of the first sealing ring 31 and the second sealing ring 32 when the temperature rises, thereby reducing the wear of the first sealing ring 31 and the second sealing ring 32, preventing a large amount of lubricating oil from leaking due to wear, and prolonging the service life of the sealing structure. When the first sealing ring 31 and the second sealing ring 32 are both in abutment with the first connecting portion 11 and spaced apart from the second connecting portion 21, the compression ring 33 can limit the first protruding portion 311 and the second protruding portion 321, avoiding excessive size expansion of the first sealing ring 31 and the second sealing ring 32 when the temperature rises, thereby preventing a large gap from being generated between the first sealing ring 31 and the second sealing ring 32 and the first connecting portion 11, and preventing a large amount of lubricating oil from leaking due to the large gap.

[0042] Specifically, one of the first connecting part 11 and the second connecting part 21 is provided with the mounting groove 4, the first sealing ring 31, the second sealing ring 32 and the pressing ring 33 are arranged in the mounting groove 4, and the pressing ring 33 can press the first sealing ring 31 and the second sealing ring 32 to the groove wall of the mounting groove 4 in the axial direction, so that the first sealing ring 31 and the second sealing ring 32 can form a seal with the groove wall of the mounting groove 4. When the first connecting part 11 is provided with the mounting groove 4, one end of the first sealing ring 31 and the second sealing ring 32 in the radial direction abuts against the second connecting part 21, and the other end of the first sealing ring 31 and the second sealing ring 32 in the radial direction is arranged in the groove bottom of the mounting groove 4; when the second connecting part 21 is provided with the mounting groove 4, one end of the first sealing ring 31 and the second sealing ring 32 in the radial direction abuts against the first connecting part 11, and the other end of the first sealing ring 31 and the second sealing ring 32 in the radial direction is arranged in the groove bottom of the mounting groove 4.

[0043] Further, when the first connecting part 11 is provided with the mounting groove 4, the first connecting part 11 is detachably connected with the pressing plate 5, and the first connecting part 11 and the pressing plate 5 jointly form the mounting groove 4; when the second connecting part 21 is provided with the mounting groove 4, the second connecting part 21 is detachably connected with the pressing plate 5, and the second connecting part 21 and the pressing plate 5 jointly form the mounting groove 4, so that through the arrangement of the pressing plate 5, the installation or replacement of the sealing assembly 3 in the mounting groove 4 can be facilitated. Specifically, the sealing structure further comprises a connecting piece 6, the pressing plate 5 is provided with a pre-buried groove 51, and the connecting piece 6 is connected to the first connecting part 11 or the second connecting part 21 through the pre-buried groove 51, so that the connecting piece 6 can be pre-buried through the pre-buried groove 51, and the connecting piece 6 is prevented from protruding from the pressing plate 5 to affect the internal structure of the gear box.

[0044] The embodiment also provides a gear box comprising the sealing structure as described above, wherein the fixed member 1 is a box body, and the rotating member 2 is a planet carrier, so that the gear box can allow the planet carrier to have a larger eccentricity relative to the box body by using the sealing structure as described above, and can also reduce the leakage of lubricating oil and ensure the effective transmission of the lubricating oil.

[0045] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A seal structure, characterized by, include: A fixing member (1) has a first connecting part (11) and the first connecting part (11) is provided with a first oil passage (111); A rotating component (2) has a second connecting part (21) that is inserted into the first connecting part (11), and the second connecting part (21) is provided with a second oil passage (211). A sealing assembly (3) is sleeved between the first connecting part (11) and the second connecting part (21). The sealing assembly (3) includes a first sealing ring (31), a second sealing ring (32), and a pressure ring (33) located between the first sealing ring (31) and the second sealing ring (32). The pressure ring (33) is provided with a third oil passage (331). The two ends of the third oil passage (331) are respectively connected to the first oil passage (111) and the second oil passage (211). Along the axial direction, the pressure ring (33) provides axial support to the first sealing ring (31) and the second sealing ring (32); In the radial direction, both the first sealing ring (31) and the second sealing ring (32) abut against the second connecting portion (21) and are spaced apart from the first connecting portion (11), or both the first sealing ring (31) and the second sealing ring (32) abut against the first connecting portion (11) and are spaced apart from the second connecting portion (21).

2. The seal structure of claim 1, wherein The sealing assembly (3) further includes an elastic element (34) that elastically abuts between the first sealing ring (31) and the pressure ring (33), and / or the elastic element (34) elastically abuts between the second sealing ring (32) and the pressure ring (33).

3. The seal structure of claim 2, wherein The first sealing ring (31) and / or the second sealing ring (32) and / or the pressure ring (33) have a limiting groove (35), and part of the elastic element (34) is embedded in the limiting groove (35).

4. The seal structure of claim 1, wherein The first sealing ring (31) has a first protrusion (311) protruding from the side facing the second sealing ring (32), and the second sealing ring (32) has a second protrusion (321) protruding from the side facing the first sealing ring (31). The pressure ring (33) abuts against the first protrusion (311) and the second protrusion (321) on one side in the radial direction.

5. The seal structure of claim 4, wherein The first protrusion (311) and the second protrusion (321) are both located between the pressure ring (33) and the first connecting part (11).

6. The sealed structure of claim 1, wherein One of the first connecting part (11) and the second connecting part (21) is provided with a mounting groove (4), and the first sealing ring (31), the second sealing ring (32) and the pressure ring (33) are all provided in the mounting groove (4).

7. The seal structure of claim 6, wherein When the first connecting part (11) opens the mounting groove (4), the first connecting part (11) is detachably connected with a pressing plate (5), and the first connecting part (11) and the pressing plate (5) jointly enclose the mounting groove (4); when the second connecting part (21) opens the mounting groove (4), the second connecting part (21) is detachably connected with a pressing plate (5), and the second connecting part (21) and the pressing plate (5) jointly enclose the mounting groove (4).

8. The seal structure of claim 7, wherein The sealing structure further comprises a connecting piece (6), the pressing plate (5) is provided with a pre-embedded groove (51), and the connecting piece (6) is connected to the first connecting part (11) or the second connecting part (21) through the pre-embedded groove (51).

9. The seal structure according to any one of claims 1 to 8, characterized in that The second oil path (211) and the third oil path (331) are both provided with a plurality of, a plurality of second oil paths (211) are arranged along the circumference of the rotating member (2) at intervals, and a plurality of third oil paths (331) are arranged along the circumference of the pressure ring (33) at intervals.

10. A gear box characterized in that, The sealing structure comprises the sealing structure according to any one of claims 1-9, the fixed member (1) is a box body, and the rotating member (2) is a planet carrier.

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