JP2003074711A - Oil seal with retainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent metal powder from being produced by mutual rubbing of retainers in the stacked state of oil seals with the retainers. SOLUTION: This oil seal with the retainer has the retainer made of metal and mounted to an engine block, and an oil seal part having a seal lip coming in contact with a crankshaft. The outer side face of the retainer is formed with such a projecting part that the retainers do not come in mutual contact in the stacked state of the retainers.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil seal with a retainer used for sealing an engine block and a crankshaft of a vehicle engine. 2. Description of the Related Art An oil seal with a retainer for sealing an engine block of an engine mounted on an automobile or the like and a crankshaft has been conventionally used, for example, in Japanese Unexamined Utility Model Publication No.
No. 199925 is already known. The oil seal with a retainer described in Japanese Utility Model Application Laid-Open No. 2-19925 is one in which an oil seal is integrally formed on the inner peripheral surface of a metal retainer. In order to integrally form the oil seal with the inner peripheral surface of the retainer, the retainer is immersed in an adhesive to apply the adhesive to the entire retainer, or to apply an adhesive to a part of the retainer. [0004] Such an oil seal 10 with a retainer.
At the time of attaching the unit 1 to the engine block or during transportation, the oil seal with the retainer may be placed in a stacked state as shown in FIG. [0005] However, since the retainer 102 of the oil seal 101 with a retainer is made of metal, when the retainers are directly stacked as shown in FIG. At this time, the retainers may rub against each other to generate metal powder, or the adhered adhesive may peel off and adhere to the lip 104. If such metal powder or the like is attached to the engine block while adhering to the lip 104, the lip 104 may bite between the crankshaft and oil leakage. SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional drawbacks and to prevent the occurrence of metal powder or the like due to the rubbing of the retainers when the oil seals with the retainers are stacked, so that the metal lip or the like can be removed from the lip. An object of the present invention is to provide an oil seal with a retainer that prevents the oil seal from sticking. [0007] In order to achieve the above object, an oil seal with a retainer according to the present invention comprises: a metal retainer attached to an engine block of an engine;
In an oil seal with a retainer having an oil seal portion having a seal lip that contacts a crankshaft, a projection is formed on an outer side surface of the retainer such that the retainers do not contact each other when the retainer is stacked. It is characterized by: Therefore, according to the present invention, when the oil seals with the retainers are stacked, a gap corresponding to the height of the projection is formed, so that the retainers do not rub against each other. Therefore, the generation of metal powder or the like is eliminated, and the metal powder or the like does not adhere to the lip portion of the oil seal and bites between the crankshaft and oil leakage does not occur. FIG. 1 shows an embodiment of the present invention.
Explanation will be made based on FIG. An oil seal 1 with a retainer according to a first embodiment shown in FIG. 1 is a retainer 2 formed in a pedestal portion 7 by forming a metal material such as aluminum into a substantially cylindrical shape and extending a part of its outer periphery. And an oil seal portion 3 made of a rubber material on the inner periphery of the retainer. A lip 4 that contacts the crankshaft is formed on the inner periphery of the oil seal portion 3, and the outer periphery of the oil seal portion 3 is formed integrally with the inner periphery of the retainer 2. Further, the retainer 2 is provided with a plurality of bolt holes 5 for attaching to the engine block. Four cylindrical projections 6 made of a rubber material are provided on an outer side surface of the retainer 2. Further, as shown in FIG. 3, these four protrusions 6 are integrally formed at positions where a plurality of oil seals with retainers are stacked and can be brought into contact with the inner side surface of the oil seal with retainers adjacent thereto. . The position, shape, size, number, etc. of the protrusions 6 can be variously changed according to the shape of the retainer 2. In addition, since the protrusion 6 is provided on the outer side surface, it is not necessary to consider the material of the protrusion 6 such as sealing performance. Therefore, the material of the protruding portion 6 may be any material that absorbs impact, such as a rubber material, and may be formed of urethane resin or the like. Further, in the first embodiment of the present invention, the protrusion 6 is attached to the outer side surface of the retainer by integral molding.
You may make it attach by adhesion, fitting, etc. According to the oil seal with the retainer of the embodiment of the present invention, the following operation and effect can be obtained. The oil seals with the retainers are stacked as shown in FIG. 2 in a process of attaching to the engine block and during transportation. In this case, since the cylindrical protrusion 6 is provided on the outer side surface of the oil seal 1 with the retainer, the adjacent retainers are in a state where they do not come in contact with each other except the tip of the protrusion. Thereby, a gap is formed from the outer side surface of the retainer 2 by the height of the protrusion. Due to the existence of the gap, the retainers made of metal rub against each other, so that no metal powder is generated.
Metal dust adheres to the crankshaft and bites between the crankshaft and oil leakage does not occur. An oil seal 11 with a retainer according to a second embodiment shown in FIG. 3 is formed by forming a metal material such as aluminum into a substantially cylindrical shape and extending a part of the outer periphery, similarly to the first embodiment. A retainer 12 formed on the pedestal portion 17 and an oil seal portion 13 made of a rubber material are integrally formed on the inner periphery of the retainer 12. A lip 14 that contacts the crankshaft is formed on the inner periphery of the oil seal portion 13. Further, the retainer 12
Are provided with a plurality of bolt holes 15 for attaching to the engine block. The projection 16 is located on the outer side surface of the retainer 12 in the same manner as described above, and is formed by continuously forming projections above the pedestal 17. Also in the second embodiment, a gap corresponding to the height of the projection is formed in a state where the oil seals with retainers 11 are stacked, such as during a mounting process to the engine block or during transportation. As in the case described above, the retainers do not rub against each other. Therefore, as in the first embodiment, since no metal powder is generated, the metal powder adheres to the lip portion 14 of the oil seal and bites between the lip portion 14 of the oil seal and the crankshaft, thereby causing oil leakage. Disappears. In the oil seal with retainer of the present invention, the oil seal is integrally formed on the inner periphery of the retainer. However, a separate oil seal may be fitted to the inner periphery of the retainer. Good. As described above, according to the present invention, an oil seal with a retainer for sealing an engine block and a crankshaft of an engine mounted on an automobile or the like is provided on the outer side surface of the oil seal with a retainer. By forming the protruding portion, a gap is formed between the stacked oil seals with the retainer, and the generation of metal powder due to the rubbing of the retainers is prevented. As a result, metal powder or the like does not adhere to the lip, and the metal powder does not bite between the lip and the crankshaft, thereby preventing oil leakage.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an oil seal with a retainer showing a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state where the oil seal with a retainer of the first embodiment of the present invention is stacked. FIG. 3 is a perspective view of an oil seal with a retainer showing a second embodiment of the present invention. FIG. 4 is a cross-sectional view showing a state in which a conventional oil seal with a retainer is stacked. Oil seals 2, 12, 102 Retainers 3, 13, 103 Oil seals 4, 14, 104 Lips 5, 15 Bolt holes 6, 16 Protrusions 7, 17 Base

Claims (1)

Claims: 1. An oil seal with a retainer having a metal retainer attached to an engine block and an oil seal portion having a seal lip in contact with a crankshaft, wherein an outer side surface of the retainer has An oil seal with a retainer, wherein a projection is formed such that the retainers do not come into contact with each other when the retainers are stacked.