JPS5936496Y2 - Support structure of exhaust system in tractor - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a structure in which an exhaust system taken out from an engine is supported by a support serving as a support part of a step.

As is well known, for example, in agricultural tractors, the engine is mounted on the front of the machine, and the exhaust system from the engine is installed vertically upward.In this case, it is a standard specification, but in special cases, For example, when used in an orchard or in a greenhouse, if installed upright, it poses a problem when driving or otherwise, so it is brought to the front of the bottom of the machine and then turned further backward.

In the case of this special specification, since the engine is located at the front, it is necessary to configure the exhaust system to extend considerably to the rear, but conventionally, to accommodate such a long device, a dedicated support structure was constructed. This was not only disadvantageous in terms of cost, but also time-consuming and inconvenient to assemble.

Therefore, it may be possible to place the muffler of the exhaust system below the step, but in order to increase the ground clearance of the tractor, the muffler needs to be placed on the side of the machine body.

Furthermore, since the clutch pedal is located close to the bottom of the step, it is required not to interfere with its operation.

If the muffler is placed in a position that satisfies all of these requirements,
This results in separation from the manifold outwardly, backwardly, and downwardly, making it difficult to attach the member that supports it and causing problems in that it is difficult to obtain sufficient attachment strength.

This idea was devised to solve the above problem, and its purpose was to improve the ground clearance of the tractor and the clutch pedal by locating the muffler of the exhaust system below the step and away from the machine body. The purpose is to ensure a stepping operation and to also use the step supports 1 to mount the muffler, thereby obtaining sufficient strength and facilitating the installation.

The features of this invention to achieve this purpose are that the engine and mission case form the fuselage, steps are placed on both sides of the fuselage above the bottom surface, and steps extend outward from the fuselage. A tractor that is supported by a step support, the lower part of the clutch pedal extending upward from the bottom of this step is pivoted to the fuselage, and the exhaust system connected to the engine is arranged so that it can be exhausted backwards along one side of the fuselage. In the above, the muffler of the exhaust system is arranged below the step and outwardly away from the fuselage so as to overlap the lower part of the clutch pedal in a side view, and the step support has a rising step support portion on the outer side. In addition, four upwardly facing parts are formed in the middle of the muffler, and a band is provided on which the muffler is fitted and fixed from above.

This invention will be explained below according to an illustrated example.

The figures shown in Figures 1 and 5 are examples of agricultural tractors.
The vehicle has a transmission case 2 at the rear and an engine 3 at the front.

A rear wheel 5 with fenders 4 is provided on both sides of the transmission case 2, and in this case, a floor seat I-6 is fixedly installed between the fenders 4 to cover a wide area including the bottom of a seat (not shown). Further, steps 7 are extended on both sides of the front portion of the transmission case 2 so as to be fixed to the front end of the seat 6.

This step 7 is fixed to the floor sheet 6, and
It is fixed to the transmission case 2 through its inner end wall, and the rear end of the slightly wider front half is fixed to the fender 4 facing it, and the front part of the step 7 is bent at the same time. It is also fixed to the rear end of a fixed mud-proof cover 8 provided in a stop-like manner.

Incidentally, reference numeral 9 denotes a transparent upper protective cover fixed further above the mud-proof cover 8, and is also connected to the mud-proof cover 8.

On the other hand, the front engine 3 has a radiator 10 at its front.
For this purpose, a gate-shaped front axle frame 11 is extended from both sides of the engine 3 by bolts, and the radiator 10 is elastically supported on the upper part of the front axle frame 11.

Note that 12 and 13 are cooling circulation pipes that connect with the engine 3.

The engine 3 equipped with these is covered with a bonnet 14. In this case, fixed bonnets 15 with inverted sides are placed facing each other on the left and right, and a side-opening upper bonnet 16 is provided between the two. In addition, the front end is equipped with a front grill 17 that also serves as an intake air, so that both sides of the engine 3 are completely open.

A safety cover 19 with a pin 18 protruding from the upper edge is attached to each of the open locations, and for this purpose, cover stays 20 are installed upright from the front and rear of the front axle frame 11.
In this way, the pin 18 is inserted into the bonnet 14 of the other side, the bottom edge of the safety cover 19 is applied to the cover stay 20, and the safety cover 19 is made removable with the desired fastener 21. The side bonnet 14 has a V-shaped side ridge where the upper end is longer than the lower end, so after inserting the pin 18, the bonnet 14, which has become valley-shaped, is in charge of the safety cover 19. This made assembly very convenient, and also extremely convenient to remove.

In this way, the safety cover 19 completely covers the side surface, and the exhaust device 22 is taken out while maintaining this state.

The exhaust system 22 includes an exhaust manifold 23 protruding from the left side of the engine 3, a bent exhaust communication pipe 24 connected to the exhaust manifold 23, and a muffler 2 connected to the pipe 24.
I warn you with 5.

Normally, the tip of the manifold 23 is directed outward to the left, but in the case of this tractor, the standard type is a vertically upward exhaust device, which is installed vertically through the bonnet 14 itself, so that The tip is facing upward.

Further, the exhaust communication pipe 24 is connected to the manifold 23 and is bent upward and forward, and has a first pipe section a formed downward through the left brain of the radiator 10, thereby extending along the side of the engine 3. A second pipe part b extends rearward, a third pipe part C extends perpendicularly outward from the end of the second pipe part B, and a third pipe part C extends rearwardly from the third pipe part C through the lower part of the mud-proof cover 8. Extending fourth pipe part d
Since the first and second pipe parts a and t), which are called the front parts of the exhaust system 22, are shaped parallel to the engine 3, these parts can be completely accommodated within the corresponding safety cover 19. The third pipe part C is shaped like this and is the middle part.
is protruded outward from the rear of the safety cover 19 along the front of the mud-proof cover 8, and the fourth pipe d, which is the rear part, is curved rearward and downward along the front of the mud-proof cover 8. It has been extended.

On the other hand, the muffler 25 connected to the rear end of these is directed further rearward along the bottom of the step 7, and in this case, the step support 26 attached to the left bottom of the fuselage 1 is placed below the step 7. The bifurcated portions 26a extend in parallel and are divided into two forked portions, and the forked portions 26a are attached to the front and rear walls of the step 7 in a slightly twisted state, and these supports 26 are used. Then, it is fixed with a fastening band 27.

Note that 26b is a reinforcing piece that is bent and formed at the base of the support 26, and is an integral piece.

That is, as shown in FIG. 5, the step support 26 is formed in a cross-shaped shape when viewed from the front, and has an upward concave portion formed in the middle of a portion parallel to the step 7, so that the muffler 25 can be fitted from below. A band 27 is fitted and fixed from above, and the upwardly raised bifurcated part 26a (step support part) supports the outer part of the step 7, and is connected to the support of the step 7. It also serves as the installation of muffler 25.

Therefore, the center of the muffler 25 is at approximately the same height as the lower surface of the aircraft body 1, and the lower part of the muffler 25 is located at the step support 26.
The reinforcing piece 26b is located above the reinforcing piece 26b of the fuselage 1, and is spaced outwardly from the fuselage 1, as shown in FIGS.
In side view, the clutch pedal 30 overlaps the lower part of the clutch pedal 30 which is pivotally supported by the step and extends from the lower part to the upper part of the step, thereby making it higher than the lower surface of the engine 3 and lowering the ground clearance of the tractor. That's not the case.

In this invention described in detail above, the muffler of the exhaust system is placed below the step and on the outer side away from the aircraft body so that it overlaps the lower part of the clutch pedal in side view, so the clutch pedal is depressed and operated. It can be placed close to the bottom of the step without interfering with the
Further, the step support has a rising step support part on the outside, and has four upwardly facing parts formed in the middle part on which the muffler is fitted and placed from below, and is provided with a band on which the muffler is fitted and fixed from above. Since the muffler does not require any special parts for mounting, it can also be used as a step support.The muffler can be mounted while being placed on the support, so installation is simple and easy, and it can be used as a step support. Because of this, it is ``strong''.

[Brief explanation of the drawing]

Fig. 1 is a side external view of the front of the tractor showing an example of this invention, Fig. 2 is a partially cutaway side view showing the inside taken out, Fig. 3 is a front view of the exhaust connecting pipe, Fig. 4 The figure is a plan view thereof, and FIG. 5 is a sectional view taken along the line VV in FIG. 1... Aircraft, 7... Step, 22.
...Exhaust device, 23...Exhaust manifold, 24...Exhaust connection pipe, 25...
・Muffler, 26...Step support)・.

Claims (1)

[Scope of utility model registration request] The engine and mission case form a fuselage, and steps are placed on both sides of the fuselage above the bottom surface of the fuselage, supported by step supports extending outward from the fuselage, and extending upward from the bottom of the steps. In a tractor in which the lower part of the clutch pedal is pivotally supported on the body, and the exhaust system connected to the engine is arranged so as to be able to exhaust the air backwards along one side of the body, the muffler of the exhaust system is connected to the lower part of the clutch pedal when viewed from the side. The step support is disposed below the step and on the outside away from the fuselage so as to overlap, and the step support has a rising step support portion on the outside and an upward recess in the middle where the muffler is fitted and placed from below. 1. A support structure for an exhaust system in a tractor, characterized in that a band is formed and a muffler is fitted and fixed from above.