JPH0512370Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a sealing device for an engine intake pipe for construction machinery, and more specifically, it relates to a sealing device for an engine intake pipe for construction machinery. It relates to a device that seals gaps.

[Conventional technology]

In construction machinery, the intake pipe of the engine is passed through the cabin such that the air intake is located outside the cabin. The through hole in the cabin is designed to allow movement of the intake pipe due to engine vibration.
It has become quite large. The gap formed between the intake pipe and the through hole is sealed to prevent air that has passed through the radiator from being taken into the engine via this gap.

Sealing is achieved by covering the hole in the cabin through which the intake pipe passes with a sealing plate, and passing the intake pipe through the sealing plate. The seal plate is made of foamed synthetic resin and is fixed to the cabin, leaving the area around the through hole, so that even if the intake pipe moves due to engine vibration, it will cover the aforementioned gap.

[Problem that the invention attempts to solve]

Such an intake pipe sealing device has a problem in that engine vibrations are repeatedly transmitted to the foamed synthetic resin board via the intake pipe, so that the foamed synthetic resin board deteriorates quickly.

The present invention provides a more durable sealing device for an engine intake pipe for construction machinery.

[Means for solving problems]

The sealing device of the present invention solves the problem by allowing the sealing plate to slide together with the intake pipe while contacting the cabin.

Embodiments of the engine intake pipe sealing device for construction machinery according to the present invention will be described below with reference to the accompanying drawings.

〔Example〕

FIG. 1 shows a cabin of a hydraulic excavator, and reference numeral 11 indicates the cabin, and 12 and 13 indicate intake pipes of an engine housed in the cabin 11, respectively.

The cabin has an opening 14 in its upper wall. The intake pipes 12, 13 are passed through the opening 14 so that the air intake is located outside the cabin 11. The opening 14 of the cabin is the intake pipe 1
2 and 13 are the intake pipes 12 and 13 due to engine vibration.
In order to prevent the engine 13 from colliding with the cabin 11 when it moves, it is sized to have a sufficient clearance between it and the intake pipe.

The seal plate 15 has openings 16 and 17 in the center, which are larger in size than the cabin opening 14 and slightly smaller than the diameter of the intake pipe. This sealing plate is arranged to cover the opening 14 of the cabin and has the openings 16, 17 pressed into the intake pipes 12, 13 so that it can move together with the intake pipes.

A guide plate 18 is arranged above the seal plate 15. This guide plate has a shallow channel-shaped cross section and consists of a member with a groove open at both ends.
A substantially eyeglass-shaped opening 19 is provided in the center. This guide plate connects the intake pipes 12 and 13 to the opening 19.
are arranged in engagement with each other on the sealing plate, and have downwardly extending parallel walls supported by the upper wall of the cabin. The seal plate 15 is accommodated within the space formed by the guide plate 18, and can also perform the above-mentioned sliding movement within this space.

Further, a guide plate 21 is disposed between the seal plate 15 and the cabin 11. This guide plate also has an opening through which the intake pipe passes, but it is configured as one opening 22. There are 2 openings in the cabin.
2 aligned with the opening 14 of the cabin;
It is fixed to the cabin 11 with six bolts 23. Although located above the seal plate 15, the guide plate 18 has both side walls welded and fixed to the guide plate 21, and forms one unit together with the guide plate 18.

In this sealing device, when the intake pipes 12 and 13 move together with the engine due to engine vibrations, for example, when they move in the horizontal direction, the seal plate 15 slides while being guided by the guide plate 18 to The gap between the pipes 12, 13 and the cabin opening 14 can be sealed, and the intake pipe 12,
13 moves up and down, the seal plate 15 bends around the intake pipes 12 and 13.
Since the surrounding area is held down by the guide plate 18, the intake pipes 12, 13 and the cabin opening 20
The gap formed between the two can be reliably sealed. Since the seal plate 15 moves together with the intake pipes 12 and 13 in this way, it moves together with the intake pipes 12 and 13 while being prevented from floating by the guide plate 18. Therefore, the material of the seal plate is selected. can be made more widely than conventional equipment. For example, weather-resistant and mechanically strong materials such as cloth-filled rubber belts can be used, thereby making the device extremely durable. Furthermore, when it becomes necessary to replace the seal plate 15, loosen the bolt 23 and pull it out from the intake pipes 12, 13.
This can be done by simply pulling out the seal plate 15 from the open side of the case formed by the guide plates 18 and 21 and replacing it, and since the entire device is integrated into a unit, it can be easily attached and detached.

In the embodiment described above, the seal plate 15 is made to move within the space formed by the two guide plates 18 and 21, but it is possible to fix the guide plate 18 directly to the cabin 11.
The guide plate 21 can also be omitted.

[Effect of idea]

As described above, the sealing device for an engine intake pipe for construction machinery of the present invention is designed so that the sealing plate covering the cabin opening is prevented from lifting up by the guide plate, and slides and bends together with the intake pipe. As a result, compared to conventional devices, the seal plate suffers less fatigue, and a wider range of materials can be selected for the seal plate, resulting in extremely high durability.

[Brief explanation of the drawing]

The drawings show an embodiment of the sealing device for an engine intake pipe for construction machinery according to the present invention, in which FIG. 1 is a central sectional view, FIG. 2 is a plan view, and FIG.
FIG. 4 is an exploded perspective view. 11...cabin, 12,13...intake pipe, 1
4...Cabin opening, 15...Seal plate, 16,
17...Opening of seal plate, 18...Guide plate, 1
9...Opening of guide plate, 21...Second guide plate, 22...Opening of second guide plate.

Claims (1)

[Claims for Utility Model Registration] 1. A cabin that houses an engine, an intake pipe for the engine that penetrates the cabin and has an air intake port protruding outside the cabin, and covers an opening in the cabin through which the intake pipe passes. and a sealing plate passing through the intake pipe, the sealing plate is coupled to the intake pipe and is slidable on the cabin, and the guide plate forms a space for the sealing plate to allow said sliding. A seal for an engine intake pipe for construction machinery, characterized in that the seal is disposed above the seal plate, is supported by the cabin, and is provided with an opening through which an intake pipe associated with the opening in the cabin passes. Device. 2 disposed between the sealing plate and the cabin, fixed to the cabin, provided with an opening through which an intake pipe associated with the opening in the cabin passes, and forming the space for the sealing plate and connecting the guide to the housing; Utility model registration claim 1 that includes a coupled second guide plate
The sealing device described in Section.