JPH0140785Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a noise prevention device for reducing noise generated from wheeled construction machinery vehicles.

[Conventional technology]

Conventionally, in order to reduce engine noise in wheeled construction machinery vehicles, a rubber plate has been placed on the bottom plate of the engine, and its effectiveness has already been recognized.

Generally, a sound absorbing member is installed around the engine,
An effective way to reduce the opening ratio is to install a new enclosure or bottom plate around the engine.

[Problem that the invention attempts to solve]

Although it has become common practice to use iron plates for the bottom plate, etc., this iron plate is not easy to process and handle, increases processing costs, and is not easy to attach or detach.

An object of the present invention is to provide a noise prevention device that is effective in reducing engine noise generated from the inside of a wheeled construction machinery vehicle and is easy to process, install, and remove.

[Means for solving problems]

The present invention provides a noise prevention device in which a sound absorbing plate 1 is provided around the noise source of a wheeled construction machinery vehicle, and the sound absorbing plate 1 absorbs noise energy. , are provided across the bottom surface of each transmission 9, and are provided in the side opening of the articulation section 4. And this sound absorption board 1
is formed by a rubber plate 11 and a sound absorbing material 12 integrally provided on the inner surface of the rubber plate.

[Effect]

The present invention uses the flexible sound absorbing plate 1 to absorb and reduce noise emitted from the engine 2, axle housing 3, transmission 9, and articulation section 4 to the outside.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in a wheeled construction machinery vehicle, a variable sound absorbing plate 1 is
By using it as a bottom cover over the bottom of each of the engine 2, axle housing 3 and transmission 9, as well as a side cover of the articulation section 4, noise from the engine and the transmission can be reduced. The system is designed to reduce noise by absorbing noise.

The articulate section 4 connects a loader frame 5 on the front side and an engine end frame 6 on the rear side by a central upper and lower support shaft 7, and a hydraulic cylinder provided between the left and right sides of both frames 5 and 6. 8
This is a steering mechanism that rotates the loader frame 5 about the support shaft 7 with respect to the engine end frame 6.

As shown in FIGS. 3 and 4, the sound-absorbing plate 1 is formed by integrally providing a sound-absorbing material 12 such as urethane on the inner surface of a rubber plate 11 by pasting or the like. For example, as shown in FIG. 3, dedicated stays 13 are attached to the main frame 17 on both sides.
, one side of the sound absorbing plate is fixed to the stay on one side with a bolt 14 as a locking means, and the other side of the sound absorbing plate is fixed to the stay on the other side with a thumbscrew 15 as a locking means. . 16 is the bolt 14 mentioned above.
and a screw hole into which the wing screw 15 is screwed.

Since the sound absorbing plate 1 is variable, the axle housing 3 can be easily inspected by simply removing the thumb screw 15 and releasing one side of the sound absorbing plate 1, as shown in FIG.

Further, due to the above-mentioned variability, the sound absorbing plate 1 has the following characteristics:
It can be freely applied to the protruding parts of the axle housing 3, etc., and the production and installation of this sound absorbing plate requires no effort and cost.

Further, since the sound absorbing plate 1 is variable, it can be provided on both sides of the articulation section 4 of a wheeled construction machine vehicle as described above, and as shown in FIGS. 1 and 2, Stays 21 are provided on the loader frame 5 and the engine end frame 6, respectively.
22, and screw 2 between the stays 21 and 22.
Attach the sound absorbing plate 1 using 3 and 24.

In that case, even if the sound absorbing plate 1 comes into contact with hydraulic hoses, etc. in the articulation section, there is no risk of damaging them, and the articulation section not only prevents noise but also prevents mud from entering. can also be effectively achieved.

In the above embodiment, the sound absorbing plate 1 was installed so as to continuously cover all of the bottom surface of the engine 2, the bottom surface of the axle housing 3, and the bottom surface of the transmission 9 with one plate. However, the present invention is not limited thereto, and the sound absorbing plate 1 may be separately attached to each of the bottom surface of the engine, the bottom surface of the axle housing, and the bottom surface of the transmission. This allows you to arbitrarily remove only the necessary portions of the sound absorbing plate.

Further, the sound absorbing plate 1 may be directly fixed to the main frame 17 or the like with screws or the like without providing the stay 13 or the like.

[Effect of idea]

According to the present invention, the sound-absorbing plate used in wheeled construction machinery vehicles is formed using a highly variable rubber plate as a base and a sound-absorbing material is integrally provided on the inner surface of this rubber plate. The cost is lower than that of the bottom plate, and it is easy to remove, making it easy to inspect and maintain internal machinery such as the transmission or axle housing by simply releasing the fixation on one side of the sound-absorbing plate during maintenance, etc. Furthermore, since the sound absorbing plate can be freely deformed relative to the protrusion of the axle housing or the like when installing the sound absorbing plate, the installation is easy and requires no effort and cost. Therefore, this sound absorbing plate can be easily attached to the lower part of the engine, axle housing, or transmission to prevent the adhesion of mud and the like. Further, the noise emitted to the outside from the engine, transmission, and axle housing can be sufficiently reduced. Furthermore, since this sound-absorbing plate is variable, it can also be provided on the side opening of the articulate part for wheeled construction machinery vehicles that have an articulate part. Since it expands and contracts depending on the degree of expansion and contraction, it is possible to reduce noise at the articulation part, which was impossible with conventional iron plates.

[Brief explanation of drawings]

Fig. 1 is a front view of a wheeled construction machinery vehicle equipped with the noise prevention device of the present invention, Fig. 2 is a bottom view thereof, Fig. 3 is a sectional view of its sound absorption plate, and Fig. 4 is its sound absorption FIG. 3 is a cross-sectional view of the plate with one side removed. 1...Sound absorbing plate, 11...Rubber plate, 12...Sound absorbing material.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a noise prevention device in which a sound-absorbing plate is provided around the noise source of a wheeled construction machine vehicle and the sound-absorbing plate absorbs noise energy, the sound-absorbing plate is The sound-absorbing plate is provided over the bottom of each of the axle housing and transmission, and at the side opening of the articulation part, and is combined with a rubber plate and a sound-absorbing material integrally provided on the inner surface of the rubber plate. A noise prevention device for a wheeled construction machinery vehicle, characterized in that it is formed by: (2) The noise prevention device for a wheeled construction machine vehicle as set forth in claim 1 of the utility model registration claim, wherein the sound absorbing plate is fixed on both sides by locking means.