Maintenance-free sealing structure

Abstract

The utility model discloses a maintenance-free sealing structure which comprises a box body, a speed reducer shaft, a labyrinth transparent cover, an oil slinger and a labyrinth ring, and a gap channel is formed between the labyrinth transparent cover and the speed reducer shaft. The speed reducer shaft is sleeved with the oil slinger, an oil return channel is formed between the oil slinger and one side of the labyrinth transparent cover, and the two ends of the oil return channel are communicated with one end of the gap channel and the interior of the box body; the speed reducer shaft is sleeved with the labyrinth ring, a lubricating channel is formed between the labyrinth ring and the other side of the labyrinth transparent cover, the lubricating channel is communicated with the other end of the gap channel, and the lubricating channel is filled with lubricating grease used for blocking the other end of the gap channel. Non-contact design is adopted, the sealing service life of the speed reducer is prolonged, the maintenance-free effect is achieved, lubricating oil in the gap channel can be thrown back into the box body through the oil slinger, meanwhile, the lubricating channel is filled with lubricating grease, the other end of the gap channel is blocked, the lubricating oil is prevented from leaking, and pollutants such as dust are prevented from being immersed.

Description

Technical Field

[0001] The utility model relates to the technical field of reducer sealing, in particular to a maintenance-free sealing structure. Background Art

[0002] At present, during the operation of the reducer, the temperature of the dynamic seal mating surface is too high, the dynamic seal lip is prone to carbonization, the lip and the working surface of the matching parts are prone to wear, and oil leakage is prone to occur during the operation. In addition, for some reducers used in harsh environments, dust and other pollutants often enter the reducer. Dust and other pollutants are mixed with lubricating oil under the stirring of the gears, contaminating the lubricating oil, affecting the lubricating effect and fluidity of the lubricating oil, and causing excessive wear of the gears and bearings. At the same time, the lubricating oil mixed with dust and other pollutants is easy to accumulate in the oil return channel, blocking the return of the lubricating oil, causing excessive wear of the gears and heating of the bearings. Utility Model Content

[0003] In view of this, an object of the present invention is to provide a maintenance-free sealing structure.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A maintenance-free sealing structure, comprising:

[0006] Box;

[0007] A reducer shaft, wherein the reducer shaft is arranged in the housing;

[0008] A labyrinth cover, the labyrinth cover is mounted on the box body, the labyrinth cover is sleeved on the reducer shaft, a gap channel is formed between the labyrinth cover and the reducer shaft, a plurality of grooves are provided inside the labyrinth cover, and each groove is recessed outwardly along the radial direction of the reducer shaft;

[0009] An oil slinger ring, which is sleeved on the reducer shaft and located on one side of the labyrinth cover, an oil return channel is formed between the oil slinger ring and one side of the labyrinth cover, and both ends of the oil return channel are connected with one end of the gap channel and the interior of the box body;

[0010] A labyrinth ring is sleeved on the reducer shaft and is located on the other side of the labyrinth cover. A lubrication channel is formed between the labyrinth ring and the other side of the labyrinth cover. The lubrication channel is connected to the other end of the gap channel. The lubrication channel is filled with grease, and the grease is used to seal the other end of the gap channel.

[0011] In the above maintenance-free sealing structure, the oil slinger ring is provided with a plurality of notched grooves, the plurality of notched grooves are arranged in the oil return channel, and each of the notched grooves is arranged along the radial direction of the reducer shaft.

[0012] In the above-mentioned maintenance-free sealing structure, a plurality of the grooves are arranged in sequence along the axial direction of the reducer shaft.

[0013] The above-mentioned maintenance-free sealing structure, wherein an inclined channel is provided on the labyrinth cover, one end of the inclined channel is connected to at least one of the grooves, the other end of the inclined channel is connected to the oil return channel, and the other end of the inclined channel is arranged at least opposite to one of the notch grooves.

[0014] The above-mentioned maintenance-free sealing structure, wherein an annular groove is provided on the labyrinth cover, the annular groove is recessed radially inwardly along the reducer shaft, the annular groove is connected to the oil return channel, and the other end of the inclined channel is connected to the annular groove.

[0015] The above-mentioned maintenance-free sealing structure, wherein a first recessed portion is formed axially on one side of the labyrinth cover, and the oil slinger ring has a first protruding portion, the first protruding portion extends into the first recessed portion, and a plurality of the notched grooves are all opened on the first protruding portion.

[0016] In the above maintenance-free sealing structure, a plurality of second recessed portions are formed axially on the other side of the labyrinth cover, and a plurality of second protruding portions are provided on the labyrinth ring, and each of the second protruding portions extends into the second recessed portion.

[0017] In the above maintenance-free sealing structure, a plurality of the second protrusions are arranged in sequence along the radial direction, and a plurality of the second recesses are also arranged in sequence along the radial direction.

[0018] Due to the adoption of the above technology, the utility model has the following positive effects compared with the prior art:

[0019] The utility model provides a maintenance-free sealing structure, in which the labyrinth cover and the reducer shaft, the oil slinger ring and the labyrinth ring are not in contact, which greatly prolongs the seal life of the reducer and achieves a maintenance-free effect. By arranging the oil slinger ring, a small amount of lubricating oil entering the gap channel can be slung back into the box body, and at the same time, the lubricating channel is filled with grease, which can not only seal the other end of the gap channel to prevent the lubricating oil from leaking, but also prevent dust, water and other pollutants from infiltrating. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the maintenance-free sealing structure of the utility model.

[0021] Figure 2 yes Figure 1 A partial enlarged schematic diagram of .

[0022] In the accompanying drawings: 1. housing; 2. reducer shaft; 3. labyrinth cover; 4. clearance channel; 5. groove; 6. oil slinger; 7. oil return channel; 8. labyrinth ring; 9. lubrication channel; 10. notch groove; 11. inclined channel; 12. annular groove; 13. first recessed portion; 14. first protruding portion; 15. second protruding portion; 16. second recessed portion; 17. accommodating channel. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention. Figure 1 It is a schematic diagram of the maintenance-free sealing structure of the utility model; Figure 2 yes Figure 1 For a partial enlarged schematic diagram of Figure 1 to Figure 2 As shown, a maintenance-free sealing structure of a preferred embodiment is shown, comprising: a housing 1, a reducer shaft 2, a labyrinth cover 3, an oil slinger 6 and a labyrinth ring 8, wherein the reducer shaft 2 is arranged in the housing 1; the labyrinth cover 3 is installed on the housing 1, the labyrinth cover 3 is sleeved on the reducer shaft 2, a gap channel 4 is formed between the labyrinth cover 3 and the reducer shaft 2, a plurality of grooves 5 are opened inside the labyrinth cover 3, and each groove 5 is recessed outwardly along the radial direction of the reducer shaft 2; the oil slinger 6 is sleeved on the reducer shaft 2 and is located at one end of the labyrinth cover 3 On the other side, an oil return channel 7 is formed between the oil slinger ring 6 and one side of the labyrinth cover 3, and both ends of the oil return channel 7 are connected with one end of the gap channel 4 and the interior of the box body 1; the labyrinth ring 8 is sleeved on the reducer shaft 2 and is located on the other side of the labyrinth cover 3, and a lubrication channel 9 is formed between the labyrinth ring 8 and the other side of the labyrinth cover 3, and the lubrication channel 9 is connected with the other end of the gap channel 4. The lubrication channel 9 is filled with grease, which is used to block the other end of the gap channel 4, which can prevent the leakage of lubricating oil and prevent the infiltration of dust, water and other pollutants.

[0024] In a preferred embodiment, there is no contact between the labyrinth cover 3 and the reducer shaft 2, the oil slinger 6 and the labyrinth ring 8, thereby reducing friction and wear on the sealing surface, lowering the temperature of the utility model and thus lowering the temperature of the lubricating oil, improving the working efficiency of the reducer, greatly extending the reducer seal life, and achieving a maintenance-free effect.

[0025] In a preferred embodiment, the labyrinth cover 3, the reducer shaft 2, the oil slinger 6 and the labyrinth ring 8 are all made of metal material, which is not affected by temperature and climate and is suitable for use in harsh environments.

[0026] In a preferred embodiment, a plurality of grooves 5 are sequentially arranged along the axial direction of the reducer shaft 2 , and a throttling effect is generated when the lubricating oil passes through the plurality of grooves 5 , thereby achieving a sealing effect.

[0027] In a preferred embodiment, a plurality of notched grooves 10 are provided on the oil slinger 6, and the plurality of notched grooves 10 are arranged in the oil return channel 7. Each notched groove 10 is arranged along the radial direction of the reducer shaft 2, so that the centrifugal force generated when the reducer shaft 2 drives the oil slinger 6 to rotate can throw the lubricating oil back into the housing 1, thereby achieving the purpose of sealing.

[0028] In a preferred embodiment, an inclined channel 11 is provided on the labyrinth cover 3, one end of the inclined channel 11 is connected to at least one groove 5, the other end of the inclined channel 11 is connected to the oil return channel 7, and the other end of the inclined channel 11 is arranged at least opposite to a notch groove 10.

[0029] In a preferred embodiment, an annular groove 12 is provided on the labyrinth cover 3 , the annular groove 12 is recessed radially inwardly along the reducer shaft 2 , the annular groove 12 is connected to the oil return channel 7 , and the other end of the inclined channel 11 is connected to the annular groove 12 .

[0030] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention.

[0031] The utility model also has the following implementation methods based on the above:

[0032] In a further embodiment of the utility model, a first recessed portion 13 is formed axially on one side of the labyrinth cover 3, and a first protruding portion 14 is provided on the oil slinger 6. The first protruding portion 14 extends into the first recessed portion 13, and a plurality of notched grooves 10 are provided on the first protruding portion 14.

[0033] In a further embodiment of the present invention, a plurality of second recessed portions 16 are formed axially on the other side of the labyrinth cover 3 , and a plurality of second protruding portions 15 are formed on the labyrinth ring 8 . Each second protruding portion 15 extends into the second recessed portion 16 .

[0034] In a further embodiment of the present invention, a plurality of second protruding portions 15 are sequentially arranged along the radial direction, and a plurality of second recessed portions 16 are also sequentially arranged along the radial direction.

[0035] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A maintenance-free sealing structure, characterized in that: include: Box; A reducer shaft, wherein the reducer shaft is arranged in the housing; A labyrinth cover, the labyrinth cover is mounted on the box body, the labyrinth cover is sleeved on the reducer shaft, a gap channel is formed between the labyrinth cover and the reducer shaft, a plurality of grooves are provided inside the labyrinth cover, and each groove is recessed outwardly along the radial direction of the reducer shaft; An oil slinger ring, which is sleeved on the reducer shaft and located on one side of the labyrinth cover, an oil return channel is formed between the oil slinger ring and one side of the labyrinth cover, and both ends of the oil return channel are connected with one end of the gap channel and the interior of the box body; A labyrinth ring is sleeved on the reducer shaft and is located on the other side of the labyrinth cover. A lubrication channel is formed between the labyrinth ring and the other side of the labyrinth cover. The lubrication channel is connected to the other end of the gap channel. The lubrication channel is filled with grease, and the grease is used to seal the other end of the gap channel.

2. The maintenance-free sealing structure according to claim 1, characterized in that: The oil slinger ring is provided with a plurality of notched grooves, and the plurality of notched grooves are all arranged in the oil return passage, and each of the notched grooves is arranged along the radial direction of the reducer shaft.

3. The maintenance-free sealing structure according to claim 1, characterized in that: A plurality of the grooves are arranged in sequence along the axial direction of the reducer shaft.

4. The maintenance-free sealing structure according to claim 2, characterized in that: The labyrinth cover is provided with an inclined channel, one end of which is communicated with at least one of the grooves, the other end of which is communicated with the oil return channel, and the other end of which is arranged at least opposite to one of the notched grooves.

5. The maintenance-free sealing structure according to claim 4, characterized in that: The labyrinth cover is provided with an annular groove, which is recessed inwardly along the radial direction of the reducer shaft. The annular groove is communicated with the oil return channel, and the other end of the inclined channel is communicated with the annular groove.

6. The maintenance-free sealing structure according to claim 2, characterized in that: A first recessed portion is formed axially on one side of the labyrinth cover, and a first protruding portion is provided on the oil slinger ring. The first protruding portion extends into the first recessed portion, and a plurality of notched grooves are provided on the first protruding portion.

7. The maintenance-free sealing structure according to claim 1, characterized in that: A plurality of second recessed portions are formed along the axial direction on the other side of the labyrinth cover, and a plurality of second protruding portions are provided on the labyrinth ring, and each of the second protruding portions extends into the second recessed portion.

8. The maintenance-free sealing structure according to claim 7, characterized in that: A plurality of the second protrusions are arranged in sequence along the radial direction, and a plurality of the second recesses are also arranged in sequence along the radial direction.

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