Double-layer oil seal device

Abstract

The utility model provides a double-layer oil seal device which can prevent dust and sprayed cooling liquid from gradually extending into a bearing along with the rotation of a rotating shaft so as not to influence the service life of the bearing, and comprises a ring body, the two sealing lip parts are symmetrically arranged on the ring body, the annular containing grooves are formed in the two sealing lip parts respectively, the annular springs are arranged on the sealing lip parts in a sleeving mode and located in the annular containing grooves, the two dustproof lip parts are symmetrically arranged on the ring body, and the gap area is formed between the two sealing lip parts. The cavity area is formed between the sealing lip part and the ring body, the outflow hole is formed in the lower end of the ring body and communicated with the cavity area, and the gap area is communicated with the cavity area.

Description

Technical Field

[0001] The utility model relates to the technical field of oil seal devices, in particular to a double-layer oil seal device. Background Art

[0002] Oil seals are seals installed in mechanical equipment, mainly used to prevent sand, dust, water vapor, etc. from invading the bearings from the outside. They are widely used in various mechanical equipment, such as industrial machinery, construction machinery, automobiles, motorcycles, ships, airplanes, etc. They are used in bearings, reducers, transmission systems, hydraulic systems and other parts to maintain the normal operation of the equipment and extend the life of the equipment.

[0003] like Figure 1 As shown, the oil seal in the prior art includes a ring body 1', a sealing lip 2' arranged on the ring body 1', an annular placement groove 3' opened on the sealing lip 2', an annular spring 4' sleeved on the sealing lip 2' and located in the annular placement groove 3', and a dustproof lip 5' arranged on the ring body 1' and located on the other side of the sealing lip 2'.

[0004] Although the traditional oil seal installed on the rotating shaft can prevent moisture and dust from directly penetrating into the bearing, when the cutting blade installed on the rotating shaft is used in stone cutting, the dust generated during the cutting process and the sprayed coolant will adhere to the rotating shaft. As the rotating shaft rotates, the dust and coolant will gradually penetrate into the bearing, thereby affecting the service life of the bearing. Utility Model Content

[0005] The utility model aims to provide a double-layer oil seal device which will not allow dust and sprayed coolant to gradually penetrate into the bearing as the shaft rotates, thereby not affecting the service life of the bearing, in view of the defects and shortcomings of the prior art.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a double-layer oil seal device, including a ring body, and also including two sealing lips symmetrically arranged on the ring body, annular placement grooves respectively opened on the two sealing lips, an annular spring sleeved on the sealing lips and located in the annular placement groove, two dustproof lips symmetrically arranged on the ring body, a gap area formed between the two sealing lips, a cavity area formed between the sealing lips and the ring body, an outlet hole opened at the lower end of the ring body and connected to the cavity area, and the gap area is connected to the cavity area.

[0007] A further improvement is that an oil filling hole is provided at the upper end of the ring body, and the oil filling hole is communicated with the cavity area.

[0008] A further improvement is that a sealing plug is arranged at the lower end of the ring body in the outflow hole.

[0009] A further improvement is that the upper end of the sealing plug is threadedly connected to the lower end of the ring body and is located in the outflow hole.

[0010] A further improvement is that an oil filling plug is arranged at the upper end of the ring body located in the oil filling hole.

[0011] A further improvement is that the upper end of the oil filling plug which is threadedly connected to the ring body is located in the oil filling hole.

[0012] A further improvement is that the end surfaces of the two sealing lips close to the gap area are provided with inclined surfaces.

[0013] After adopting the above technical scheme, the beneficial effect of the utility model is as follows: the oil seal is installed on the carrier and pressed on the outer end face of the rotating shaft through the sealing lip and the dustproof lip. When dust and sprayed coolant adhere to the rotating shaft and enter the ring body as the rotating shaft rotates, the dust and sprayed coolant fall from the gap area to the cavity area, and the dust and sprayed coolant are then discharged outward from the position of the outlet hole, so that the dust and sprayed coolant will not gradually extend into the bearing as the rotating shaft rotates, thereby not affecting the service life of the bearing.

[0014] Further effect: the oil filling hole can inject lubricating oil into the ring body, and the sealing lip and the rotating shaft can be lubricated by the lubricating oil, thereby reducing the friction between the sealing lip and the rotating shaft, and when impurities are attached to the gap area or the cavity area, the injected lubricating oil can flush the attached impurities down and flow out of the outlet hole along with the lubricating oil, thereby achieving the cleaning of the gap area and the cavity area and improving the effect of discharging impurities to the outside.

[0015] Further effect: the sealing plug can be installed in the outlet hole, and the sealing plug can be regularly disassembled so that impurities in the cavity area can be discharged to the outside, thereby reducing the phenomenon of impurities entering the cavity area from the outlet hole.

[0016] Further effect: when lubricating oil needs to be added, the oil filling plug is taken out from the oil filling hole, and lubricating oil is immediately added to the oil filling hole. When filling is not needed, the oil filling plug is installed in the oil filling hole, thereby reducing the phenomenon of impurities entering the cavity area from the oil filling hole.

[0017] Further effect: when the shaft rotates and drives the attached dust and moisture through the gap area, and does not naturally fall into the gap area, the end points of the inclined surface and the sealing lip can hang the dust and moisture on the shaft, so that it falls completely into the gap area and then flows out from the outlet hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a structural schematic diagram of an oil seal ring in the prior art;

[0020] Figure 2 It is the installation diagram of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the utility model.

[0022] Explanation of the reference numerals: ring body 1, sealing lip 2, annular placement groove 3, annular spring 4, dustproof lip 5, gap area 6, cavity area 7, outflow hole 8, oil filling hole 9, sealing plug 10, oil filling plug 11, inclined surface 12. DETAILED DESCRIPTION

[0023] The utility model is now further described in conjunction with the accompanying drawings and specific embodiments.

[0024] See also Figures 2 to 3 As shown, the technical solution adopted in this specific embodiment is: a double-layer oil seal device, including a ring body 1, and also includes two sealing lips 2 symmetrically arranged on the ring body 1, annular placement grooves 3 respectively opened on the two sealing lips 2, annular springs 4 sleeved on the sealing lips 2 and located in the annular placement grooves 3, two dustproof lips 5 symmetrically arranged on the ring body 1, a gap area 6 formed between the two sealing lips 2, a cavity area 7 formed between the sealing lips 2 and the ring body 1, and an outlet hole 8 opened at the lower end of the ring body 1 and connected to the cavity area 7, and the gap area 6 is connected to the cavity area 7. Figure 2 As shown, the sealing lip 2 is the end point where the end of the inner diameter is connected to the rotating shaft, and the dustproof lip 5 is the end point where the end of the inner diameter is connected to the rotating shaft. The characteristics of this end point are the same as those of the oil seal ring in the prior art. The ring body 1 is fixedly mounted on a fixed flange or other carrier, and a discharge port is provided on the carrier at the lower end of the outflow hole 8, and the discharge port is connected to the position of the outflow hole 8. An oil filling port is provided on the carrier above the oil filling hole 9, and the oil filling port is connected to the oil filling hole 9. The use direction of the ring body 1 is not limited, and any left or right end surface of the ring body 1 can be used as a sealing surface or an exposed surface.

[0025] An oil filling hole 9 is formed at the upper end of the ring body 1 , and the oil filling hole 9 is communicated with the cavity area 7 .

[0026] The lower end of the ring body 1 is located in the outflow hole 8 and is provided with a sealing plug 10 .

[0027] The upper end of the sealing plug 10 is threadedly connected to the lower end of the ring body 1 and is located in the outflow hole 8. The sealing plug 10 can also be an elastic plug. The head of the sealing plug 10 is provided with a slot for a screwdriver to twist.

[0028] The upper end of the ring body 1 is located in the oil filling hole 9 and is provided with an oil filling plug 11 .

[0029] The oil filling plug 11 is threadedly connected to the upper end of the ring body 1 and is located in the oil filling hole 9. The oil filling plug 11 can also be an elastic plug. The head of the oil filling plug 11 is provided with a slot for a screwdriver to twist.

[0030] The end surfaces of the two sealing lips 2 close to the gap area 6 are provided with inclined surfaces 12 .

[0031] The working principle of the utility model is as follows: the oil seal is installed on the carrier and pressed on the outer end surface of the shaft through the sealing lip 2 and the dustproof lip 5. When the dust and the sprayed coolant adhere to the shaft and enter the ring body 1 as the shaft rotates, the dust and the sprayed coolant fall from the gap area 6 to the cavity area 7, and then the dust and the sprayed coolant are discharged outward from the position of the outflow hole 8, so that the dust and the sprayed coolant will not gradually extend into the bearing as the shaft rotates, thereby not affecting the service life of the bearing.

[0032] The oil injection hole 9 can inject lubricating oil into the ring body 1, and the sealing lip 2 and the rotating shaft can be lubricated by the lubricating oil, thereby reducing the friction between the sealing lip 2 and the rotating shaft. When impurities are attached to the gap area 6 or the cavity area 7, the injected lubricating oil can wash the attached impurities down and flow out of the outflow hole 8 along with the lubricating oil, thereby cleaning the gap area 6 and the cavity area 7 and improving the effect of discharging impurities outward.

[0033] When the shaft rotates and drives the attached dust and moisture to pass through the gap area 6, and does not naturally fall into the gap area 6, the inclined surface 12 and the end point of the sealing lip 2 can hang the dust and moisture on the shaft, so that it falls completely into the gap area 6 and then flows out from the outlet hole 8.

[0034] The utility model is intended to protect the structure of the product. The model of each component is not the content of the utility model, and it is also a known technology. As long as the components on the market can achieve the above functions of the utility model, they can be selected and applied as a double-layer oil seal device. Therefore, the model and other parameters of the components are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of various components.

[0035] The above shows and describes the basic principle and main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents. Anything not described in detail in the utility model is a well-known technology of those skilled in the art.

Claims

1. A double-layer oil seal device, comprising a ring body, characterized in that: It also includes two sealing lips symmetrically arranged on the ring body, annular placement grooves respectively opened on the two sealing lips, annular springs sleeved on the sealing lips and located in the annular placement grooves, two dustproof lips symmetrically arranged on the ring body, a gap area formed between the two sealing lips, a cavity area formed between the sealing lips and the ring body, an outlet hole opened at the lower end of the ring body and connected to the cavity area, and the gap area is connected to the cavity area.

2. A double-layer oil seal device according to claim 1, characterized in that: An oil filling hole is provided at the upper end of the ring body, and the oil filling hole is communicated with the cavity area.

3. A double-layer oil seal device according to claim 1, characterized in that: The lower end of the ring body is located in the outflow hole and is provided with a sealing plug.

4. A double-layer oil seal device according to claim 3, characterized in that: The upper end of the sealing plug is threadedly connected to the lower end of the ring body and is located in the outflow hole.

5. A double-layer oil seal device according to claim 2, characterized in that: The upper end of the ring body is located in the oil filling hole and is provided with an oil filling plug.

6. A double-layer oil seal device according to claim 5, characterized in that: The oil filling plug is threadedly connected to the upper end of the ring body and is located in the oil filling hole.

7. A double-layer oil seal device according to claim 1, characterized in that: The end surfaces of the two sealing lips close to the gap area are provided with inclined surfaces.

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