JPH0414525Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention provides a bonnet that covers the upper and lateral sides of an engine mounted on a swivel base, and an opening for air circulation is formed below the engine. Concerning the driving part of a car.

[Conventional technology]

Conventionally, only the frame of the swivel base was present below the engine, and an extremely large opening for air circulation was formed to suppress the rise in temperature inside the bonnet.

[Problem that the invention attempts to solve]

However, noise generated from engines, hydraulic equipment, etc. is strongly propagated to the outside through air circulation openings, and environmental deterioration due to noise tends to become a problem in urban areas, etc., and effective soundproofing measures for motive parts are desired.

The purpose of this invention is to sufficiently suppress the noise propagation from the air circulation opening below the engine to the outside while maintaining the temperature rise control function inside the bonnet, and to make the structure durable. The point is to make it excellent.

[Means for solving problems]

The characteristic configuration of the present invention is that a large number of belt-shaped iron plates are arranged in parallel below an engine mounted on a swivel base, with their widths facing up and down, and tilted approximately parallel to each other. A sound absorbing material is provided on the upper surface of each iron plate, and an air circulation opening formed below the engine is arranged between the lower surface of the strip iron plate and the upper surface of the sound absorbing material. , its effects are as follows.

[Effect]

In other words, since a large number of air circulation openings are formed between the iron strip and the sound absorbing material, the temperature rise inside the bonnet covering the engine can be sufficiently suppressed by the circulation of outside air. Since the opposite side is equipped with sound absorbing material, when the noise inside the bonnet propagates to the outside through the air circulation opening,
The sound absorbing material effectively muffles the sound, and can sufficiently suppress noise propagation to the outside.

Furthermore, the band-shaped iron plate located below the sound absorbing material can sufficiently protect the sound absorbing material from the earth and sand that is stepped up from below as the vehicle travels.

[Effect of idea]

As a result, it is possible to sufficiently prevent environmental deterioration due to noise from the moving parts, while maintaining sufficient cooling function to prevent engine output reduction and electrical system failure due to temperature rise under the bonnet, and the durability of the soundproof structure. It has become possible to provide sufficient soundproofing and provide excellent soundproofing functions as a whole.

〔Example〕

Next, examples will be shown.

As shown in FIG.
It is attached to a crawler type traveling device 6 having a dozer device 5, and constitutes a backhoe work vehicle that can also perform earth removal work.

Engine 3 by bonnet 7 and arch 8
The bonnet 7 is configured to cover the entire upper and lateral sides of the bonnet 7 to suppress the noise inside the bonnet 7 from propagating to the outside.

As shown in FIG. 4, in the part of the swivel base 4 facing the internal space of the bonnet 7, an undercover 9 is inserted into the gap between the frames 4a of the swivel base 4.
are detachably provided, and each of the undercovers 9 is constructed as shown in FIGS. 1 and 2.

That is, a large number of steel strips 9a are connected to a frame 9b for attachment to the swivel frame 4a, with their widths facing in the vertical direction and tilted substantially parallel to each other, and each of the strips 9a is In order to cool the internal space of the bonnet 7 with outside air, a plate-shaped sound absorbing material 9c is provided on the upper surface by pasting or the like, and between the lower surface of the strip iron plate 9a and the upper surface of the sound absorbing material 9c. forming an air circulation opening 10, and
Sound absorbing material 9c prevents the noise inside the bonnet 7 from propagating to the outside.
In addition, the structure is such that the sound absorbing material 9c is prevented from being damaged by the band-shaped iron plate 9a.

[Another example]

Next, another embodiment will be described.

When a large number of strip iron plates 9a are arranged below the engine 3, the mounting structure, installation range, etc. can be changed as appropriate, and the material, mounting structure, etc. of the sound absorbing material 9c can be changed as appropriate.

The model of the backhoe work vehicle, the frame structure of the swivel base 4, the mounting structure of the engine 3, the structure of the bonnet 7, and other specific configurations of the backhoe work vehicle are not limited.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view of the main part, Fig. 2 is a sectional view of the main part, Fig. 3 is an overall side view of the working vehicle, and Fig. 4 is a partially omitted plan view of the driving part. It is a diagram. 3...Engine, 4...Swivel base, 7...Bonnet, 9a...Strip iron plate, 9c...Sound absorbing material, 10
...Opening for air circulation.

Claims (1)

[Scope of utility model registration request] In a backhoe work vehicle, a bonnet 7 is provided to cover the upper and lateral sides of an engine 3 mounted on a swivel base 4, and an air circulation opening 10 is formed below the engine 3. sound-absorbing materials 9c are arranged below the engine 3 in a vertically oriented posture and inclined substantially parallel to each other, and on the upper surface of each of the strip-shaped iron plates 9a.
A driving part of a backhoe work vehicle, wherein the air circulation opening 10 is disposed between the downward surface of the strip iron plate 9a and the upward surface of the sound absorbing material 9a.