CN210265854U - Inside and outside dustproof oil blanket structure - Google Patents
Inside and outside dustproof oil blanket structure Download PDFInfo
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- CN210265854U CN210265854U CN201920812910.8U CN201920812910U CN210265854U CN 210265854 U CN210265854 U CN 210265854U CN 201920812910 U CN201920812910 U CN 201920812910U CN 210265854 U CN210265854 U CN 210265854U
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Abstract
The utility model discloses an inside and outside dustproof oil blanket structure, inside and outside dustproof oil blanket structure is the ring form integral structure of circle, include: the outer framework, the inner framework, the main lip, the spring, the outer auxiliary lip and the inner auxiliary lip; the inner auxiliary lip comprises a body and a first protruding part, wherein the first protruding part protrudes obliquely from the body and faces towards the oil side. The main lip plays an oil sealing role, the external auxiliary lip plays an external foreign matter isolating role, and the internal auxiliary lip plays an internal foreign matter isolating role. From this, solved among the prior art main lip and the inside impurity contact of box and lead to the problem of damage, realized two dustproof on oil blanket structure self. Meanwhile, the existing structure of the box body is kept unchanged to the maximum extent, the installation process is not changed, and the cost is saved. Furthermore, the inner and outer dustproof oil seal structure adopts a universal design and is wide in application range.
Description
Technical Field
The utility model relates to the technical field of machinery, concretely relates to inside and outside dustproof oil blanket structure.
Background
An oil seal (oil seal) is a mechanical element used to seal grease (oil is the most common liquid substance in a transmission system, also generally referred to as a liquid substance), which isolates parts requiring lubrication from a power output part in a transmission component so as not to allow the lubricating oil to leak. Static seals and dynamic seals (generally reciprocating) are called oil seals. The framework oil seal is a typical representative of oil seals, and is a double-lip (main lip and external auxiliary lip) oil seal with a self-tightening spring, wherein the rubber is completely coated. The crankshaft is used for gasoline engines, diesel engines, gearboxes, differentials, shock absorbers, engines, axles and other parts.
In the automotive filed, the oil seal has a wide application range, and in the use process of speed reducers and gear box oil seals, foreign matters and impurities in the box can be present, so that the main lip of the oil seal is easily damaged to the foreign matters and impurities which cannot be removed, and oil leakage is further caused. Two methods are commonly adopted in the existing internal dustproof technology, one method is that a magnet is placed in a box body, iron filings in the box body are adsorbed, the flow of the iron filings in lubricating oil is reduced, but the magnet can only adsorb partial iron filings, a small amount of iron filings still flow in the box body along with the lubricating oil, and other impurities cannot be interfered; the other type is additionally provided with a filter screen which can filter most foreign matters, but has high requirements on the space of the box body and higher cost.
Therefore, it is necessary to develop an inner and outer dust-proof oil seal structure capable of suppressing contact between the main lip and impurities inside the case.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an inside and outside dustproof oil blanket structure to main lip and the inside impurity contact of box among the solution prior art and lead to the problem of damage.
In order to solve the technical problem, the utility model provides an inside and outside dustproof oil blanket structure, inside and outside dustproof oil blanket structure is the ring form integral structure, include: the outer auxiliary lip, the inner auxiliary lip and the main lip form the inner circumferential surface of the inner and outer dustproof oil seal structure;
the inner framework comprises a first connecting frame and a first supporting frame, the outer framework comprises a second connecting frame and a second supporting frame, the outer side wall of the first connecting frame is connected with the inner side wall of the second connecting frame in an axially fitting manner, and the first supporting frame and the second supporting frame are radially arranged on the outer sides of the first connecting frame and the second connecting frame respectively along the same side;
the inner auxiliary lip comprises a body and a first bulge, the body is arranged at the end part of the first support frame, and the first bulge is obliquely bulged on the body and faces towards the oil side;
the outer auxiliary lip comprises a body and a third bulge, the body is arranged at the end part of the second support frame, and the third bulge obliquely bulges on the body and faces to the air side; the outer auxiliary lip is connected with the main lip through a bending part, the main lip comprises a second protruding part and a groove, and the spring is arranged in the groove in an inner hoop mode.
Further, in the inner and outer dustproof oil seal structure, the first protruding portion is in interference fit with the rotating shaft, and the first interference magnitude is i 1; the second boss is in interference fit with the rotating shaft, and the second interference magnitude is i; wherein the first interference i1 < the second interference i.
Further, in the inside and outside dustproof oil seal structure, the interval between main lip and the inside vice lip is greater than 0.5 mm.
Further, in the inner and outer dustproof oil seal structure, the first protruding portion is trapezoidal, an included angle α 1 between a side waist of the first protruding portion close to the oil surface and the axial direction is 40-50 degrees, and an included angle β 1 between the side waist of the first protruding portion far away from the oil surface and the axial direction is 20-30 degrees.
Further, in the inner and outer dust-proof oil seal structure, a second convex part with a sharp top is formed on the inner circumference of the main lip, the included angle β between the inclined surface of the second convex part at the air side and the axial direction is 40-50 degrees, and the included angle α between the inclined surface of the second convex part at the oil side and the axial direction is 20-30 degrees.
Further, in the inner and outer dustproof oil seal structure, rubber layers are laid on two side walls of the outer framework, wherein the rubber layer positioned on the outer side wall of the outer framework forms the outer circumferential surface of the inner and outer dustproof oil seal structure.
Further, in the inside and outside dustproof oil seal structure, the material of outside vice lip, inside vice lip and main lip is rubber, inside vice lip, outside vice lip are located respectively through the vulcanization the tip of first support frame, second support frame.
The utility model provides an in the inside and outside dustproof oil blanket structure, the main lip plays the oil blanket effect, outside vice lip plays isolated outside foreign matter effect, inside vice lip plays isolated inside foreign matter effect. The dimension of the inner auxiliary lip is referenced to the dimension of the outer auxiliary lip, and meanwhile, only impurities are isolated and an oil film can pass through the inner auxiliary lip. From this, solved among the prior art main lip and the inside impurity contact of box and lead to the problem of damage, realized two dustproof on oil blanket structure self. Meanwhile, the existing structure of the box body is kept unchanged to the maximum extent, the installation process is not changed, and the cost is saved. Furthermore, the inner and outer dustproof oil seal structure adopts a universal design and is wide in application range.
Drawings
Fig. 1 is a schematic structural view of an internal and external dustproof oil seal structure according to an embodiment of the present invention;
wherein the content of the first and second substances,
11-a second connecting frame; 12-a second support; 21-a first connecting frame; 22-a first support frame; 3-main lip; 4-a spring; 5-outer minor lip; 6-internal minor lip; 7-a flexure; 8-rubber layer.
Detailed Description
To make the objects, advantages and features of the present invention clearer, the following description will be made in detail with reference to the accompanying drawings and specific embodiments for an internal and external dustproof oil seal structure. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that: the drawings are in a very simplified form and are not to precise scale, and are provided solely for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention; second, the structures shown in the drawings are often part of actual structures.
Referring to fig. 1, the present embodiment provides an inner and outer dustproof oil seal structure, where the inner and outer dustproof oil seal structure is a circular integrated structure, including: the inner and outer dustproof oil seal structure comprises an outer framework, an inner framework, a main lip 3, a spring 4, an outer auxiliary lip 5 and an inner auxiliary lip 6, wherein the outer auxiliary lip 5, the inner auxiliary lip 6 and the main lip 3 form the inner circumferential surface of the inner and outer dustproof oil seal structure;
the inner framework 2 comprises a first connecting frame 21 and a first supporting frame 22, the outer framework 1 comprises a second connecting frame 11 and a second supporting frame 12, the outer side wall of the first connecting frame 11 is axially attached to the inner side wall of the second connecting frame 12, the first supporting frame 22 and the second supporting frame 12 are radially arranged on the outer sides of the first connecting frame 21 and the second connecting frame 11 respectively along the same side, and the outer framework and the inner framework support the structures of the external auxiliary lip 5, the internal auxiliary lip 6 and the main lip 3, so that the sealing effect is exerted, and the oil seal can keep the shape and the tension; in the drawings of the present embodiment, the axial direction is divided into an air side direction and an oil side direction, wherein the air side direction is vertically upward, and the oil side direction is vertically downward, it can be understood that the axial direction is not the vertical direction in actual use.
The inner auxiliary lip 6 comprises a body and a first bulge, the body is arranged at the end part of the first support frame 22, and the first bulge is obliquely bulged on the body and faces to the oil side;
the outer auxiliary lip 5 comprises a body and a third bulge, the body is arranged at the end part of the second support frame 12, and the third bulge obliquely bulges on the body and faces to the air side; in this embodiment, the outer minor lip 5 and the inner minor lip 6 are symmetrical in structure, and the third convex portion thereof is obliquely protruded from the body and faces the air side; it will be understood that the outer minor lip 5 and the inner minor lip 6 are not necessarily of symmetrical design, and that the inner minor lip 6 may be designed with reference to the outer minor lip 5 or may be adapted according to the use situation;
the outer auxiliary lip 5 is connected with the main lip 3 through a bending part 7, the main lip 3 comprises a second protruding part and a groove, and the spring 4 is arranged in the groove in an inner hoop mode.
Thus, the second projecting portion of the main lip 3 functions as an oil seal, the outer sub-lip functions as an external foreign matter insulator, and the inner sub-lip functions as an internal foreign matter insulator. The problem of among the prior art main lip 3 and the inside impurity contact of box and lead to the damage is solved, realize two dustproof on oil blanket structure self. Meanwhile, the existing structure of the box body is kept unchanged to the maximum extent, the installation process is not changed, and the cost is saved. Furthermore, the inner and outer dustproof oil seal structure adopts a universal design and is wide in application range.
Preferably, the first protruding portion is in a trapezoid shape, an included angle between a side waist of the first protruding portion close to the oil surface and the axial direction is α 1, a value range of α 1 is 40-50 °, in this embodiment, α 01 is 45 °, an included angle between a side waist of the first protruding portion far away from the oil surface and the axial direction is β 1, a value range of β 1 is 20-30 °, in this embodiment, β 1 is 25 °, an inner circumference of the main lip 3 is formed with a second protruding portion with a sharp top, an included angle between an inclined surface of the second protruding portion on the air side and the axial direction is β is 20-30 °, in this embodiment, β is 25 °, an included angle between an inclined surface of the second protruding portion on the oil side and the axial direction is α 1, a value range of α is 40-50 °, in this embodiment, α is 45 °, specifically, the first protruding portion is in interference fit with the rotating shaft, the first interference is 1, the second protruding portion is in interference fit with the rotating shaft, and the interference is 1.
In this embodiment, when the diameter d1 is 5mm to 30mm, the second interference i ranges from 0.7mm to 1.0mm, and the first interference i1 ranges from 0.45mm to 0.75 mm; when the axial diameter dimension d1 is 30mm-60mm, the value range of the second interference i is 1.0mm-1.2mm, and the value range of the first interference i1 is 0.70mm-0.90 mm; when the shaft diameter d1 is 60mm-80mm, the value range of the second interference i is 1.2mm-1.4mm, and the value range of the first interference i1 is 0.85mm-1.05 mm; when the axial diameter dimension d1 is 80mm-130mm, the value range of the second interference i is 1.4mm-1.8mm, and the value range of the first interference i1 is 1.00mm-1.40 mm; when the shaft diameter d1 is 130mm-250mm, the range of the second interference i is 1.8mm-2.4mm, and the range of the first interference i1 is 1.30mm-1.90 mm; when the shaft diameter dimension d1 is 250mm-400mm, the second interference i ranges from 2.4mm-3.0mm, and the first interference i1 ranges from 2.30mm-2.90 mm.
The dimensions of the internal secondary lip 6 are referenced to those of the external secondary lip 5, so as to ensure that the oil film can still pass while only isolating impurities. Therefore, the second boss is abutted to the rotating shaft, the spring 4 is hooped in the groove, and the second boss and the rotating shaft can still keep elastic abutment when relatively rotating under the action of the spring 4, so that a good sealing effect is achieved. It can be understood that the third protruding portion is structurally symmetrical to the first protruding portion in the present embodiment.
Preferably, there is at least a 0.5mm gap between the major lip 3 and the inner minor lip 6. Therefore, the interference of the internal auxiliary lip 6 structure on the main lip 3 shaft holding can be prevented, and the service performance of the product is improved.
Preferably, the material of outside vice lip 5, inside vice lip 6 and main lip 3 is rubber, inside vice lip 6, outside vice lip 5 are located respectively through the vulcanization the tip of first support frame 22, second support frame 12 will again first connecting frame 21 pressure equipment in on the second connecting piece 11 to realize the integral structure, make the leakproofness of inside and outside dustproof oil blanket structure is better, and is special, because outside vice lip 5 with inside vice lip 6 is the rubber material, needs it to keep even wall thickness, otherwise can have the inconsistent problem of shrinkage factor, leads to the product yield to descend, takes place the condition of lubricating oil seepage.
Preferably, rubber layers 8 are laid on two side walls of the outer framework, wherein the rubber layers 8 positioned on the outer side wall of the outer framework form the outer circumferential surface of the inner and outer dustproof oil seal structure. The length of the whole inner and outer dustproof oil seal structure including the rubber layer 8 along the axial direction is b; the diameter along the radial direction is D, wherein the values of b and D are determined according to practical application.
To sum up, be in the utility model provides an among the inside and outside dustproof oil blanket structure, have following advantage:
the main lip plays an oil sealing role, the external auxiliary lip plays an external foreign matter isolating role, and the internal auxiliary lip plays an internal foreign matter isolating role. From this, solved among the prior art main lip and the inside impurity contact of box and lead to the problem of damage, realized two dustproof on oil blanket structure self.
Furthermore, the existing structure of the box body is kept unchanged to the maximum extent, the installation process is not changed, the cost is saved, and the risk is reduced while the product yield is ensured.
Furthermore, the inner and outer dustproof oil seal structure adopts a universal design, and the application range is wide.
Finally, it should be noted that the above description is only for the description of the preferred embodiments of the present invention, and not for any limitation on the scope of the present invention, and that any changes and modifications made by those skilled in the art according to the above disclosure are all within the scope of the appended claims.
Claims (7)
1. The utility model provides an inside and outside dustproof oil blanket structure, its characterized in that, inside and outside dustproof oil blanket structure is the ring form integral structure, includes: the dustproof oil seal structure comprises an outer framework, an inner framework, a main lip (3), a spring (4), an outer auxiliary lip (5) and an inner auxiliary lip (6), wherein the outer auxiliary lip (5), the inner auxiliary lip (6) and the main lip (3) form the inner circumferential surface of the dustproof oil seal structure;
the inner framework comprises a first connecting frame (21) and a first supporting frame (22), the outer framework comprises a second connecting frame (11) and a second supporting frame (12), the outer side wall of the first connecting frame (21) is connected with the inner side wall of the second connecting frame (11) in an axially fitting mode, and the first supporting frame (22) and the second supporting frame (12) are radially arranged on the outer sides of the first connecting frame (21) and the second connecting frame (11) respectively along the same side;
the inner auxiliary lip (6) comprises a body and a first bulge, the body is arranged at the end part of the first support frame (22), and the first bulge obliquely bulges on the body and faces to the oil side;
the outer auxiliary lip (5) comprises a body and a third bulge, the body is arranged at the end part of the second support frame (12), and the third bulge obliquely bulges on the body and faces to the air side; the outer auxiliary lip (5) is connected with the main lip (3) through a bending part (7), the main lip (3) comprises a second protruding part and a groove, and the spring (4) is arranged in the groove in an inner hoop mode.
2. The internal and external dust-proof oil seal structure according to claim 1, wherein the first boss is in interference fit with the rotating shaft, and the first interference is i 1; the second boss is in interference fit with the rotating shaft, and the second interference magnitude is i; wherein the first interference i1 < the second interference i.
3. The internal and external dust and oil seal structure as claimed in claim 1, wherein the spacing between said main lip (3) and said internal sub-lip (6) is greater than 0.5 mm.
4. The internal and external dust and oil seal structure as claimed in claim 1, wherein said first protrusion is trapezoidal, the included angle α 1 between the side waist of said first protrusion close to the oil surface and the axial direction is 40 ° -50 °, and the included angle β 1 between the side waist of said first protrusion far from the oil surface and the axial direction is 20 ° -30 °.
5. The internal and external dust and oil seal structure as claimed in claim 1, wherein said main lip (3) is formed on its inner circumference with a second protrusion having a pointed tip, the inclined surface of said second protrusion on the air side has an angle β of 40 ° to 50 ° with the axial direction, and the inclined surface of said second protrusion on the oil side has an angle α of 20 ° to 30 ° with the axial direction.
6. The internal and external dust-proof oil seal structure according to claim 1, wherein rubber layers (8) are applied to both side walls of said outer frame, and wherein the rubber layer (8) located on the outer side wall of said outer frame constitutes the outer circumferential surface of said internal and external dust-proof oil seal structure.
7. The internal and external dust and oil seal structure as claimed in claim 1, wherein the material of the external secondary lip (5), the internal secondary lip (6) and the main lip (3) is rubber, and the internal secondary lip (6) and the external secondary lip (5) are respectively arranged at the end parts of the first support frame (22) and the second support frame (12) through vulcanization.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920812910.8U CN210265854U (en) | 2019-05-31 | 2019-05-31 | Inside and outside dustproof oil blanket structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920812910.8U CN210265854U (en) | 2019-05-31 | 2019-05-31 | Inside and outside dustproof oil blanket structure |
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| CN210265854U true CN210265854U (en) | 2020-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230699A (en) * | 2019-05-31 | 2019-09-13 | 陕西法士特齿轮有限责任公司 | A kind of inside and outside anti-dust seal structure |
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- 2019-05-31 CN CN201920812910.8U patent/CN210265854U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230699A (en) * | 2019-05-31 | 2019-09-13 | 陕西法士特齿轮有限责任公司 | A kind of inside and outside anti-dust seal structure |
| CN110230699B (en) * | 2019-05-31 | 2024-05-10 | 陕西法士特齿轮有限责任公司 | Inside and outside dustproof oil blanket structure |
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