JPH0589858U - Cylindrical seal with baffle plate - Google Patents

Abstract

(57) [Summary] The present invention is a sealing material for closing a plug hole of a head cover and a blow-by gas flow passage, and an object thereof is to improve the sealing property and the vibration damping property by integrating a plurality of sealing materials. [Structure] Cylindrical seal portion 4 for sealing the plug tube 1
It is characterized in that an elastic seal plate 6 for sealing the baffle chamber 5 is integrally formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sealing material that seals a plug hole of a head cover and a baffle chamber in an engine mounted on an automobile or the like, and specifically, a seal that blocks the plug hole and a flow passage for separating oil mist and blow-by gas. It is related to timber.

[0002]

[Prior Art]

 Conventionally, a structure as shown in FIG. 4 has been developed as a sealing structure for a baffle chamber which is attached to a head cover of an engine of an automobile or the like and serves as a spark plug hole and a blow-by gas passage. That is, the baffle chamber (5) formed in the head cover (2) is attached with a baffle plate (a) which is a separate member to serve as a blow-by gas passage, and the plug tube (1) is disposed in the plug hole. There is proposed a structure such as Japanese Utility Model Laid-Open No. 2-56841 in which an oil seal (9) for sealing the head cover (2) is attached and these are directly attached and integrated.

[0003]

[Problems to be solved by the device]

 However, in the structure in which the oil seal (9) for sealing the plug tube (1) is directly attached to the baffle plate (a), its rigidity is bad, and high attachment accuracy is required for each portion arranged. If it is installed roughly, the mounting position of the oil seal (9) will be wrong and the sealing performance will be extremely reduced. Further, in the attachment of the baffle plate (a), a gasket must be interposed in order to completely separate the air passage of the head cover (2), or the head cover (2) must be fixed with an adhesive that also has a sealing property. Its mounting workability is poor. An object of the present invention is to eliminate such a serious drawback and to provide a cylindrical seal with a baffle plate that not only facilitates and secures mounting and fixing but also has an effective action on vibration damping.

[0004]

[Means for Solving the Problems]

 The present invention will be described with reference to the drawings. As shown in FIG. 1, a baffle plate and a plug tube (1) for separating oil mist and blow-by gas, which are mounted in a head cover (2) of an automobile engine, are sealed. And a cylindrical seal portion (4) made of an elastic body for sealing the plug tube (1) and the plug hole (3) opening in the head cover (2), and the cylindrical seal portion (4) It is characterized by integrally forming an elastic seal plate (6) extending from the outer peripheral direction to the baffle chamber (5) for separating blow-by gas and oil mist.

[0005]

[Action]

 The present invention has the above-described structure and has the following excellent effects. The cylindrical seal with a baffle plate of the present invention is made of an elastic material such as synthetic rubber or synthetic resin, and the cylindrical seal portion (4) and the elastic seal plate (6) are integrally formed by this material. In its attachment, it is attached directly to the baffle chamber (5) formed inside the head cover (2) and attached by a fastening tool or various engaging structures. The cylindrical seal with the baffle plate attached and integrated with the head cover (2) closely adheres to the plug tube (1) and the head cover (2) due to the deformation characteristic of the elastic material, and has a clear baffle chamber (5). Form a passage.

[0006]

【Example】

 In implementing the present invention, the elastic material that constitutes the cylindrical seal with the baffle plate is not only required to have the required sealing performance, but also to maintain the shape for forming a partition wall between the baffle chambers (5). Strength is required. In addition, at the mounting portion, a fastener such as a bolt and a nut is used, or it is attached by a fixing means such as caulking, engaging, and adhering. In forming the baffle chamber (5), the inner member of the head cover (2) is extended to form a partition wall as shown in FIG. 1, or the partition wall (6a) is attached to the elastic seal plate (6) as shown in FIG. ) Can be formed, and in the latter structure in which the partition wall (6a) is directly formed on the elastic seal plate (6), in the head cover (2) made of an iron plate, conventionally, another member is spot-welded to form a wall. The parts that have been formed are omitted, which represents a great advantage in weight reduction, mounting workability, and vibration damping.

Further, as shown in FIG. 3, the elastic seal plate (6) is integrally provided with an oil splash prevention plate (8) adjacent to the oil filler hole (7) provided in the head cover (2). With this structure, it is possible not only to simply extend the members in the vicinity but also to prevent vibration and protect the mouth of the oil filling container.

Here, a measurement table comparing the noise characteristics of the cylindrical seal with a baffle plate of the present invention and the conventional baffle plate is shown. Here, the test material was sandwiched between two members, 10 DBV was oscillated from the end of one member, and the waveform was recorded by picking it up at the opposite end of the other member. Table 1 Table 2

[0009]

[Effect of the device]

 According to the present invention, since the cylindrical seal with the baffle plate is integrally formed of the elastic material having excellent sealing property and vibration damping property, it is possible to attach the head cover (2) to the head cover (2) very easily without the interposition of the sealing material. After mounting, it has good elasticity and has a high sealing performance familiar to each part. In addition, the baffle plate-equipped cylindrical seal exerts a strong vibration damping effect on the engine vibration. Further, since the cylindrical seal portion (4) that tightly presses the outer circumference of the plug tube (1) is integrated with the elastic seal plate (6), it covers all the plug holes (3) and realizes seamless sealing.

[0010]

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged partial sectional view showing another embodiment of the present invention.

FIG. 3 is an enlarged partial sectional view showing another embodiment of the present invention.

FIG. 4 is a partial cross-sectional view of a conventional structure not using the present invention.

[0011]

[Explanation of symbols]

 1 Plug tube 2 Head cover 3 Plug hole 4 Cylindrical seal part 5 Baffle chamber 6 Elastic seal plate 6a Partition wall 7 Oil filler hole 8 Oil splash prevention plate

Claims (2)

[Scope of utility model registration request] 1. A cylindrical seal part (4) for sealing a plug tube (1) standing upright from an ignition plug hole in an automobile engine and a plug hole (3) opening to a head cover (2), the cylindrical seal part being provided. A cylindrical seal with a baffle plate, which is integrally formed with an elastic seal plate (6) extending from (4) in the outer peripheral direction thereof and sealing a baffle chamber (5) for separating blow-by gas and oil mist. 2. The oil splash prevention plate (8) is integrally provided on the elastic seal plate (6) close to the oil filler hole (7) provided in the head cover (2). Cylindrical seal with baffle plate.