JPH0728267U - Oil seal - Google Patents

Abstract

(57) [Summary] [Purpose] To securely prevent the seal parts from sticking when the oil seals are stacked in the axial direction. [Structure] Both end surfaces 1 along the radial direction of the oil seal 11
By providing the radial projections 15 on one end surface 14 of the Nos. 4 and 16 and providing the annular projections 17 on the other end surface 16, even when the oil seals 11 are stacked, even if the positions are slightly displaced. The projections 15 and 17 are in point contact with each other to prevent the seal portion 13 from adhering to each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil seal used in automobiles, industrial machines and the like.

[0002]

[Prior art]

 An oil seal is a rubber or resin seal that is integrally molded on a metal reinforcement ring.It is mounted on a shaft to prevent oil inside the machine from leaking to the outside. It also has the function of preventing dust and muddy water from entering the inside of the machine. These oil seals are stacked and transported in the axial direction at the time of shipment, but at that time, in order to prevent the seal parts from sticking to each other and becoming difficult to peel off, a protrusion is attached to the contact part when stacked. It is provided.

FIG. 3 shows an example of such an oil seal. The oil seal 1 includes a reinforcing ring 2 having an L-shaped cross section, and a seal portion 3 formed so as to surround the reinforcing ring 2. A plurality of protrusions 5 are integrally formed along the circumferential direction on the outer end surface 4 of the seal portion 3 along the radial direction. As shown in FIG. 4, when the oil seals 1 are stacked in the axial direction, the projections 5 make point contact with the end face 6 of the adjacent oil seal 1 on the opposite side of the seal portion 3 to ensure close contact with each other. It is designed to prevent it.

[0004]

[Problems to be solved by the device]

 However, in the oil seal 1 having such a protrusion 5, when the chamfered portion 7 is provided at the corner of the end face 4 after molding, the protrusion 5 needs to be provided separately from the chamfered portion 7 so as not to be cut at the same time. Therefore, when the oil seals are stacked, the protrusions 5 may not be able to contact the adjacent end faces 6 depending on the structure of the oil seals, and the effect of preventing the adhesion may not be obtained.

Further, when the oil seals 1 are stacked, even if the center positions are shifted and stacked, the protrusions 5 may not be able to contact the adjacent end faces 6 and the adhesion prevention effect may not be obtained.

The present invention solves such a conventional problem, and an object of the present invention is to provide an oil seal having a reliable effect of preventing adhesion when stacked.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a plurality of radial projections on one of the end faces along the radial direction of the oil seal. The present invention also provides at least one annular projection on the other end surface of the oil seal.

[0008]

[Action]

 Therefore, according to the present invention, when the oil seals are stacked, the radial projections provided on the one end face come into contact with the end faces of the adjacent oil seals, so that a reliable contact prevention effect can be obtained. In addition, even if the centers of the oil seals are misaligned and overlapped, the adhesion preventing effect is not lost.

Further, when the oil seals are stacked, the radial protrusions provided on one end face of the oil seals come into contact with the annular protrusions provided on the other face of the adjacent oil seal, so The point contact can further enhance the adhesion prevention effect.

[0010]

【Example】

 FIG. 1 shows the configuration of an embodiment of the present invention. The oil seal 11 includes a reinforcing ring 12 having an L-shaped cross section, and a rubber or resin seal portion 13 integrally formed with the reinforcing ring 12. One end face 14 along the radial direction of the seal portion 13 is integrally formed with a plurality of elongated radial protrusions 15 arranged at equal intervals in the circumferential direction, and the other end face 16 is circumferentially formed. One continuous annular protrusion 17 is integrally formed.

Therefore, in such an oil seal 11, as shown in FIG. 2, when the oil seals 11 are stacked, the projections 15 are formed in a radially elongated shape, so that the end face 16 of the adjacent oil seal 11 is formed. When the chamfered portion 18 is provided at the corner after molding, even if a part of the protrusion 15 is cut, the adhesion preventing effect is not impaired. Even if the centers are overlapped with each other, the adhesion preventing effect is not impaired.

When the oil seals 11 are stacked, the protrusion 15 formed on one end face 14 of the oil seal 11 becomes an annular protrusion 17 formed on the other end face 16 of the adjacent oil seal 11. Since point contact always occurs at any position, good adhesion prevention effect can be obtained.

As described above, according to this embodiment, since the radial projections 15 are provided on one end surface 14 of the oil seal and the annular projections 17 are provided on the other end surface 16, when the oil seals 11 are stacked. In addition, it is possible to prevent the seal portion 13 from sticking.

In the present invention, as another configuration, one end surface 14 of the oil seal 11 can be provided with an annular projection 17 and the other end surface 16 can be provided with a radial projection 15 to obtain the same effect. be able to.

[0015]

[Effect of device]

 As described above, according to the present invention, when the oil seals are stacked, the protrusions provided on one surface are formed in a radial shape, so that a reliable contact preventing effect can be obtained and the center of the oil seals can be obtained. Even if they are overlapped with misalignment, the adhesion preventing effect is not lost. Further, since the projections are formed in a radial shape, the processing tool can be used from the outer diameter direction, which facilitates processing of the molding die.

Further, when the oil seals are stacked, the radial projections provided on one end surface of the oil seals come into contact with the annular projections provided on the other surface of the adjacent oil seals, so that the projections will not interfere with each other. The point contact can further enhance the adhesion prevention effect.

[Brief description of drawings]

FIG. 1 (a) is a schematic partial cross-sectional perspective view of an oil seal showing an embodiment of the present invention. (b) A reduced side view of the oil seal.

FIG. 2 is a schematic partial cross-sectional view showing a state where the oil seals are stacked.

FIG. 3 (a) is a schematic partial cross-sectional perspective view of an oil seal showing a conventional example. (b) A reduced side view of the oil seal.

FIG. 4 is a schematic partial cross-sectional view showing a state in which the oil seals are stacked.

[Explanation of symbols]

 11 Oil Seal 12 Reinforcement Ring 13 Seal Part 14 End Face 15 Protrusion 16 End Face 17 Protrusion 18 Chamfer

Claims (2)

[Scope of utility model registration request] 1. An oil seal having a plurality of radial projections on one end surface of both end surfaces along the radial direction of the oil seal. 2. The oil seal according to claim 1, wherein at least one annular projection is provided on the other end surface.