Installation structure of oil seal

Abstract

The utility model discloses an oil seal installation structure which comprises a shaft, an oil seal, a pressing plate, a fixing sleeve and a pressing nut, the shaft sequentially penetrates through the oil seal, the pressing plate and the fixing sleeve, the surface of the oil seal is attached to the surface of one side of the pressing plate, the surface of the pressing plate completely covers the surface of the oil seal, and the pressing plate is used for applying pressure to the oil seal. The surface of the fixing sleeve is attached to the surface of the other side of the pressing plate, the contact area of the fixing sleeve and the pressing plate is smaller than the area of the surface of the other side of the pressing plate, the fixing sleeve is of a cylindrical structure, threads are arranged on the outer side arc face of the fixing sleeve, the compression nut is movably connected to the outer side arc face of the fixing sleeve and used for applying pressure to the pressing plate, and the fixing sleeve is fixedly connected with the shaft.

Description

Technical Field

[0001] The utility model relates to a mounting structure for an oil seal. Background Art

[0002] Oil seal is a common name for general seals, which simply means the seal of lubricating oil. It is a mechanical component used to seal grease (oil is the most common liquid substance in the transmission system, and also refers to general liquid substances). It isolates the parts that need lubrication from the output parts in the transmission parts to prevent the leakage of lubricating oil. The seals used for static seals and dynamic seals (generally reciprocating motion) are called oil seals.

[0003] Generally, bearings require lubricating oil to work, so bearings are usually assembled on the shaft together with oil seals. In order to seal, the oil seal is assembled tightly to the shaft to eliminate gaps. Therefore, it is more troublesome to assemble the oil seal. The traditional method of installing oil seals is usually to complete the assembly by knocking the oil seal with a hammer and a copper rod. However, this method is not only easy to cause injuries to people's hands, but also poses a safety hazard. On the other hand, under this method, the force on the surface of the oil seal is uneven and often concentrated in a certain place, which can easily cause deformation of the oil seal and affect the sealing effect. Utility Model Content

[0004] The purpose of the utility model is to solve the above deficiencies in the prior art and provide an installation structure for an oil seal.

[0005] An oil seal installation structure comprises a shaft, an oil seal, a pressure plate, a fixing sleeve and a clamping nut. The shaft passes through the oil seal, the pressure plate and the fixing sleeve in sequence. The surface of the oil seal fits with the surface of one side of the pressure plate, and the surface of the pressure plate completely covers the surface of the oil seal. The pressure plate is used to apply pressure to the oil seal. The surface of the fixing sleeve fits with the surface of the other side of the pressure plate, and the contact area between the fixing sleeve and the pressure plate is smaller than the area of ​​the surface of the other side of the pressure plate. The fixing sleeve is a cylindrical structure, and its outer arc surface is provided with threads. The clamping nut is movably connected to the outer arc surface of the fixing sleeve. The clamping nut is used to apply pressure to the pressure plate. The fixing sleeve is fixedly connected to the shaft.

[0006] Preferably, the fixing sleeve is fixedly connected to the shaft by interference fit.

[0007] Preferably, the fixed sleeve is a split structure, comprising an outer sleeve and an inner sleeve, a conical hole is provided at the center of the outer sleeve surface, the inner sleeve is a conical sleeve, the inner sleeve is embedded in the conical hole of the outer sleeve, and the outer conical surface of the inner sleeve and the inner conical surface of the outer sleeve are pressed against each other.

[0008] Preferably, a side plate extending outward is provided at the edge of the bottom surface with a larger diameter on the inner sleeve, and a through hole is provided on the side of the port with a larger aperture on the outer sleeve, and a threaded hole corresponding to the through hole on the side plate is provided on the side of the port with a larger aperture on the outer sleeve, and the outer sleeve and the inner sleeve are fixedly connected by bolts.

[0009] Beneficial effects: Compared with the prior art, the utility model forms an installation structure of the oil seal through a pressing plate, a fixing sleeve and a nut. The pressing plate applies pressure to the oil seal, so that the surface of the oil seal is evenly stressed, and deformation of the oil seal is avoided. The rotating torque is converted into an axial thrust through the nut, which is more convenient for personnel to apply force. The tool for tightening the nut can also save effort and be safer.

[0010] At the same time, the split fixed sleeve structure can adapt to shafts of more sizes. According to different sizes, inner sleeves of different sizes can be selected, thus eliminating the need for specific processing steps. Similarly, according to the size of the oil seal, pressure plates of different sizes can also be selected. At the same time, the tapered inner sleeve and the outer sleeve with a tapered hole are more convenient for disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the installation structure of an oil seal;

[0012] Figure 2 is a cross-sectional view of an oil seal installation structure;

[0013] In the figure, 1, shaft, 2, bearing, 3, oil seal, 4, pressure plate, 5, nut, 6, fixing sleeve, 7, outer sleeve, 8, inner sleeve. DETAILED DESCRIPTION

[0014] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0015] like Figure 1-2 As shown, shaft 1, bearing 2, oil seal 3, pressure plate 4, nut 5, fixing sleeve 6, outer sleeve 7, inner sleeve 8;

[0016] An oil seal installation structure includes a shaft 1, an oil seal 3, a pressure plate 4, a fixing sleeve 6, and a clamping nut 5. The shaft 1 passes through the oil seal 3, the pressure plate 4, and the fixing sleeve 6 in sequence. The surface of the oil seal 3 is in contact with the surface of one side of the pressure plate 4, and the surface of the pressure plate 4 completely covers the surface of the oil seal 3. The pressure plate 4 is used to apply pressure to the oil seal 3. The surface of the fixing sleeve 6 is in contact with the surface of the other side of the pressure plate 4, and the contact area between the fixing sleeve 6 and the pressure plate 4 is smaller than the area of ​​the surface of the other side of the pressure plate 4. The fixing sleeve 6 is fixedly connected to the shaft 1 through an interference fit. The fixing sleeve 6 is a cylindrical structure as a whole, and its outer arc surface is provided with threads. The clamping nut 5 is movably connected to the outer arc surface of the fixing sleeve 6. The clamping nut 5 is used to apply pressure to the pressure plate 4. The fixing sleeve 6 is fixedly connected to the shaft 1.

[0017] The fixed sleeve 6 is a split structure, comprising an outer sleeve 7 and an inner sleeve 8. A conical hole is provided at the center of the surface of the outer sleeve 7. The inner sleeve 8 is a conical sleeve, which is embedded in the conical hole of the outer sleeve 7, and the outer conical surface of the inner sleeve 8 and the inner conical surface of the outer sleeve 7 are pressed against each other.

[0018] A side plate extending outward is provided at the bottom edge with a larger diameter on the inner sleeve 8, and a through hole is provided on the side of the port with a larger aperture on the outer sleeve 7. Threaded holes corresponding to the through holes on the side plate are provided on the side of the port with a larger aperture on the outer sleeve 7. The outer sleeve 7 and the inner sleeve 8 are fixedly connected by bolts.

[0019] Instructions for use: The installation structure of the oil seal 3 is composed of the pressure plate 4, the fixing sleeve 6 and the nut 5. The pressure plate 4 is tightly fitted with the oil seal 3, the outer sleeve 7 is put on the shaft 1, and then the inner sleeve 8 is embedded in the tapered hole of the outer sleeve 7, and pushed forward to make the surface of the fixing sleeve 6 fit with the surface of the pressure plate 4 until the inner sleeve 8 can no longer move forward. At this time, the outer conical surface of the inner sleeve 8 and the inner conical surface of the outer sleeve 7 are squeezed against each other, thereby forming an interference fit with the shaft 1. After fixing with bolts, the nut 5 is put on the outer thread of the outer sleeve 7, and the nut 5 is rotated to apply pressure in the direction of the shaft 1 to the pressure plate 4, and the pressure plate 4 then applies pressure to the oil seal 3, so that the oil seal 3 is assembled and fits with the fixed bearing 2.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil seal installation structure, characterized in that: It includes a shaft, an oil seal, a pressure plate, a fixing sleeve and a clamping nut. The shaft passes through the oil seal, the pressure plate and the fixing sleeve in sequence. The surface of the oil seal fits with the surface of one side of the pressure plate, and the surface of the pressure plate completely covers the surface of the oil seal. The pressure plate is used to apply pressure to the oil seal. The surface of the fixing sleeve fits with the surface of the other side of the pressure plate, and the contact area between the fixing sleeve and the pressure plate is smaller than the area of ​​the surface of the other side of the pressure plate. The fixing sleeve is a cylindrical structure, and its outer arc surface is provided with threads. The clamping nut is movably connected to the outer arc surface of the fixing sleeve. The clamping nut is used to apply pressure to the pressure plate. The fixing sleeve is fixedly connected to the shaft.

2. The oil seal installation structure according to claim 1, characterized in that: The fixing sleeve is fixedly connected to the shaft through interference fit.

3. The oil seal installation structure according to claim 2, characterized in that: The fixing sleeve is a split structure, comprising an outer sleeve and an inner sleeve. A conical hole is provided at the center of the outer sleeve surface. The inner sleeve is a conical sleeve, which is embedded in the conical hole of the outer sleeve, and the outer conical surface of the inner sleeve and the inner conical surface of the outer sleeve are pressed against each other.

4. The oil seal installation structure according to claim 3, characterized in that: The bottom edge of the inner sleeve with a larger diameter is provided with a side plate extending outward, and the side plate is provided with a through hole. The side of the port with a larger aperture on the outer sleeve is provided with a threaded hole corresponding to the through hole on the side plate. The outer sleeve and the inner sleeve are fixedly connected by bolts.

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