JPS6027098Y2 - Power structure of swing work vehicle - Google Patents

Description

[Detailed Description of the Invention] The present invention provides an engine and an engine cooling fan that are arranged side by side on the rear end side of the swivel base in such a manner that cooling air flows in the direction of the lateral force of the swivel base, and The present invention relates to a structure of a driving part of a swing work vehicle, in which electrical components are arranged on the rear side of a swing base, and a bonnet that covers the engine, fan, and electrical components is provided.

Conventionally, in the above-mentioned swinging work vehicle, there is a drawback that the electrical components are easily damaged by the temperature rise inside the hood caused by the engine, and the present invention solves this drawback.
The purpose is to improve the structure of the driving part so that problems such as the bonnet becoming more easily damaged or the engine noise becoming more easily transmitted to the driver do not arise.

Next, embodiments of the present invention will be described with reference to illustrative drawings.

As shown in FIG. 1, a swivel table 3 is attached to a crawler-type traveling device 2 equipped with an earth removal device 1 so that it can be driven and rotated freely around the vertical axis, and a backhoe device 4 is attached to the swivel table 3. It is attached so as to be swingable laterally by means of a pressure cylinder 5, and is provided with a driving part 6, a boarding and driving part 7, etc., thereby forming a turning work vehicle for carrying out excavation work, evacuation work, etc.

As shown in FIGS. 2 to 4, the driving unit 6 includes an engine cooling radiator 8, a fan 9, an engine 10, and an engine muffler 11 arranged in series on the rear end side of the swivel base 3. The swivel base 3 is arranged side by side in the horizontal direction, and the electrical components 12 such as an engine starter are arranged on the rear side of the swivel base 3 with respect to the engine 10, and the radiator 8, fan 9, engine 10, engine muffler 11, and electrical components A bonnet 13 covering the parts 12 and the like is attached to the swivel base 3 so as to be able to swing up and down.

In addition, an intake port 14 is provided on the front wall portion 13a of the bonnet 13 so as to be located on the radiator 8 side, and a punching metal is provided in the intake hole 14. Exhaust ports 15a and 15b are provided in the diagonal wall portion 13d between them, respectively, so that cooling air flows in the lateral direction of the swivel base 3 within the bonnet 13.

Among the exhaust ports 15a and 15b, those 15b1 are vertically arranged in parallel on the right side of the rear wall portion 13c, and the right side wall portion 13
b and the diagonal wall portion 13d are vertically arranged side by side and are formed downward and relatively narrow by the outward bulging portion 13e of the bonnet 13, and as shown in FIG. A portion 15a is formed on the upper end side of the portion 13c and has a width extending over a gold mine, facing toward the rear and having a relatively large vertical width. A guide 16 with a directional opening is provided so that exhaust air and sound exit downward from the wide exhaust port 15a.
The structure is such that the sound emitted from the a and 15b is also difficult to reach the boarding and operating section 7.

Further, a sound absorbing member 17 made of urethane foam or the like is attached to the upwardly inclined wall portion 13f in a state facing the guide 16, so that soundproofing can be more effectively achieved.

A torsion bar 18 and a coil spring 1 that bias the bonnet 13 in the upward direction in its downward position.
9, a locking device 20 for fixing the bonnet 13 in the closed position, and a bendable stopper 21 for determining the fully open position of the bonnet 13 are provided to facilitate opening and closing of the bonnet 13 and to reduce vibration when the bonnet 13 is closed. We are trying to prevent this.

Note that if the wide exhaust port 15a is placed above the rear wall portion 13c, the high temperature air can be reliably discharged and the electrical components 12 can be effectively protected.However, the vertical position of the exhaust port 15a may be determined as necessary. The exhaust port 15a may be divided into left and right sections.

Further, the specific configuration of the guide 16, the specific arrangement of the members constituting the driving section 6, the shape of the bonnet 13, the arrangement of the intake and exhaust ports 14 and 15b, etc. can be changed in various ways.

Furthermore, the present invention can be applied to various types of machines equipped with a swivel base 3, such as a crane.

In summary, the present invention provides, in the motive force structure of an official swing work vehicle, an exhaust port 15a having a relatively large vertical width on the rear wall portion 13c of the bonnet 13, the width of which spans approximately Kanayama; The guide 16 is characterized by being provided with a directional opening located inside the exhaust port 15a so that exhaust air and sound exit downward from the exhaust port 15a.

That is, by locating the exhaust port 15a as described above on the electrical component 12 side, the fan 9
The proportion of the cooling air flowing toward the electrical components 12 increases, and damage to the electrical components 12 caused by heat from the engine 10 can be effectively suppressed.

Moreover, if the exhaust port 15a is simply formed as described above, the engine 10 noise from the exhaust port 15a will be strongly transmitted to the driver onto the swivel base 3, resulting in a poor driving environment.However, due to the action of the guide 16, It has become possible to avoid such noise problems.

On the other hand, in order to suppress the propagation of noise from the engine 10 to the driver, it is conceivable to provide the bonnet 13 with an outwardly bulging portion so that the exhaust port 15a faces downward. If an attempt is made to increase the width, the amount of protrusion of the bulge increases, and the bulge is likely to be damaged due to collision with other objects as the swivel table 3 rotates.

However, if the guide 16 is placed inside the bonnet 13 as described above, the bonnet 1 due to such protrusion
3. Damage can also be avoided.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the structure of the driving part of the swinging work vehicle according to the present invention, and FIG. 1 is a schematic side view of the working vehicle, FIG. 2 is a partially cutaway plan view showing the arrangement of the driving part, and FIG. 3 is a schematic side view of the working vehicle. 5 to 5 show the bonnet structure, FIG. 3 is a plan view, FIG. 4 is a partially cutaway rear view, and FIG. 5 is a sectional view of a main part. 3...Swivel base, 9...Fan, 10.
...Engine, 12...Electrical components, 13.
...Bonnet, 13C...Rear wall part,
15a...Exhaust port, 16...Guide,
17...Sound absorbing member.

Claims (1)

[Claims for Utility Model Registration] ■ An engine 10 and an engine cooling fan 9 are arranged side by side on the rear end side of the swivel base 3 in a state where cooling and cooling air flows in the lateral direction of the swivel base 3. against the said swivel base 3
Electrical components 12 are disposed on the rear side of the hood 12. This is a driving part structure of a swinging work vehicle, which is provided with a bonnet 13 that covers the engine 10, fan 9, and electrical components 12. In addition to providing an exhaust port 15a with a relatively large vertical peak across the width of the gold mine, the exhaust port 15a is located inside the exhaust port 15a and is directional so that exhaust air and sound exit downward from the exhaust port 15a. A structure of a driving part of a turning work vehicle, characterized in that a guide 16 is provided with an opening. ■ Connect the exhaust port 15a to the bonnet rear wall portion 13c.
The structure according to claim 2 of the utility model registration claim, characterized in that the structure is arranged on the upper end side of the utility model. (2) The structure according to claim 1 or 2, wherein a sound absorbing member 17 is provided inside the bonnet 13 so as to face the guide 16.