JPS6010206Y2 - Agricultural tractor under-muffler mounting device - Google Patents

Description

[Detailed description of the invention] This invention relates to an under-muffler mounting device for agricultural tractors, and is suitable for when working on tall plants such as those used in orchards. The purpose was to open the muffler to the rear, and to use the muffler body and the extension pipe above it, which conventionally stood up from the bonnet at the front of the tractor, as they were, and to be able to firmly support the extension pipe. There is.

Another purpose of the present invention is to prevent the undermuffler from getting in the way when the operator gets on and off the vehicle.

When a conventional tractor in which a muffler body and an extension pipe stand upward from the hood at the front of the tractor is used in an orchard, relatively high temperature exhaust gas may be applied to fruit trees, potentially damaging them.

As a countermeasure to this problem, if the under muffler is one-sided, the exhaust pipe that connects the engine and the muffler main body will be relatively long, and the muffler main body and extension pipe will be arranged in a substantially horizontal position in the front and rear direction. The joints are more likely to be affected by vibrations and impacts from the road surface, and it becomes necessary to increase the holding rigidity not only for the muffler main body but also for the extension pipe.

It is also extremely difficult to select a position where the under muffler does not interfere with the operator getting on and off the vehicle.

This invention utilizes the conventional vertical muffler that stands up from the bonnet as it is, firmly supports not only the muffler itself but also the extension pipe, and is devised so that it does not get in the way of the operator getting on and off the vehicle. Next, it will be explained with reference to the drawings.

In Fig. 1 showing the plane, the muffler main body 1 and the muffler extension pipe 2 are located front and rear below the right step 3 (arrow F is the front).
The front end (left end in the figure) of the muffler main body 1 is connected to the exhaust outlet of the engine 5 via an exhaust pipe 4.

6 is a bonnet, 7 is a front tire, and 8 is a rear tire.

An inlet flange 10 integrally provided on the muffler main body 1 is rigidly connected to an outlet flange 11 at the rear end of the exhaust pipe 4 with a gasket in between by a plurality of bolts.

The inlet flange 12 of the exhaust pipe 4 is also connected to the expansion chamber of the engine 5 or the exhaust manifold (
(not shown), and therefore the exhaust pipe 4 supports the muffler body 1 in a sufficiently stable state relative to the engine 5.

The slitted front end of the muffler extension pipe 2 is fitted onto the outlet tube 14 of the muffler main body 1, and is firmly tightened by a clamp 15.

Therefore, the muffler main body 1 and the muffler extension pipe 2 are also integrally joined.

At the bottom of step 3, there is a muffler body 1 and a muffler extension pipe 2.
A plurality of bolts 16 are attached to the brackets 17 and 18 at the front and rear of the lower surface of the step 3 to support the joint of the step 3.
are fixed, and the front bracket 17 has a band 19,
Attach the muffler body 1 to the rear bracket 1 with bolts 20.
8 holds the muffler extension pipes 2 by U bolts 21, respectively.

The inner edge 3a on the side of the center of the vehicle body of the step 3 is fastened with a plurality of bolts to the right side of the transmission case (not shown) that constitutes the frame, and the opposite outer edge 3b covers the rear tire 8. is supported by a fender fixed to the frame.

Therefore, when the operator gets into the cockpit of the tractor, the operator approaches step 3 in the direction of arrow A. However, when the operator stands near step 3, the operator and the muffler main body 1, the muffler extension Brackets 17,18 will be located between the tubes 2.

As is clear from FIG. 2 when FIG. 1 is viewed in the direction of arrows ■--■, the rear end of the illustrated muffler extension tube 2 curves smoothly downward, and the opening 23 opens downward.

24 is a crank bolt. 3 and 4 are enlarged cross-sectional views of ■-■ and ■-IV in FIG. 2, respectively. In FIG. 3, the band 19 has a cylindrical portion 25 at the upper and lower ends for passing the pole 20 and 20'. .26, each bolt 20,
20' passes through a hole formed in the main body of the bracket 17, and a nut 27 is screwed onto the tip thereof.

28 is a cushioning belt.

Further, in FIG. 4, the U-bolt 21 passes through a hole in the bracket 18, and a nut 29 is screwed onto the tip to secure the muffler extension pipe 2 to the bracket 18.

Exhaust gas discharged from the engine 5 passes through the exhaust pipe 4, the muffler main body 1, and the muffler extension pipe 2, and is discharged diagonally backward and downward from the opening 23 at the rear end.

As explained above, in the present invention, the muffler body 1
and the muffler extension pipe 2 are directly connected in the front and back under the step 3, and the front end of the muffler main body 1 is connected to the engine 5 at the front of the tractor via the exhaust pipe 4. In addition, by hanging and fixing the muffler extension pipe 2 to the inside of the brackets 17 and 18 that protrude downward from the outer edge of the step, respectively, at the rear of the step 3, the outside of the muffler main body 1 and the muffler extension pipe 2 are connected to the bracket 17. .18, (1) relatively hot exhaust gas from the engine can be discharged downward from the opening 23 of the muffler extension pipe 2, which prevents thermal damage to tall plants in orchards, etc. There is no fear of giving.

(2) A conventional vertical muffler can be used for the muffler body 1 and muffler extension pipe 2.

(3) Since the muffler extension pipe 2 is supported by the bracket 18 in the same way as the step 3 supporting the muffler main body 1, the muffler main body 1 and the muffler extension pipe 2 are connected to the clamp 1.
Coupled with the strong connection at part 5, the muffler extension pipe 2 is supported at two points, mostly at the clamp 15 and the U bolt 21, increasing the holding rigidity of the muffler extension pipe 2. Can be firmly attached.

(4) Attach the muffler body 1 and muffler extension pipe 2 to step 3
Since the muffler main body 1 and the like are disposed inside the outer edge 3b of the operator, the muffler main body 1, etc. does not get in the way when the operator gets on and off, and there is no risk of burns, improving safety.

In addition, when embodying the present invention, a bracket of the l unit may be fixed to the lower side of the step 3, and the muffler main body 1 and the muffler extension pipe 2 may be fixed to the bracket.

To change the opening direction of the rear end opening 23 of the muffler extension pipe 2, loosen the U bolt 21 and clamp 15, rotate the muffler extension pipe 2 by the required amount with respect to the muffler main body outlet tube 14, and then turn the U bolt 21 and the clamp 15 should be tightened.

[Brief Description of the Drawings] Figure 1 is a plan view showing the main parts of the device according to the present invention in solid lines;
FIG. 2 is a left side view taken along arrows ``--'' in FIG. 1, and FIGS. 3 and 4 are enlarged cross-sectional views along mm and rv-- in FIG. 2, respectively. 1...Muffler body, 2...Muffler extension pipe, 3...Step, 4...Exhaust pipe,...Engine 17° 18...Bracket.

Claims (1)

[Scope of utility model registration request] The muffler main body 1 and the muffler extension pipe 2 are directly connected in the front and rear under the step 3, and the front end of the muffler main body 1 is connected to the engine 5 at the front of the tractor via the exhaust pipe 4.
By hanging and fixing the muffler body 1 at the front of the step 3 and the muffler extension pipe 2 at the rear of the step 3 by hanging them inside the brackets 17 and 18 that project downward from the outer edge of the step, the muffler body 1 is fixed. and muffler extension pipe 2
An undermuffler mounting device for an agricultural tractor, characterized in that the outside of the muffler is covered with a bracket 17, 18.