JPS5937380Y2 - connected car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement in a articulated vehicle, particularly a coupled vehicle consisting of a tractor and a semi-trailer.

Conventionally, in a coupled vehicle consisting of this type of tractor and semi-trailer, the tractor has been required to have driving performance as a coupled vehicle when traveling with the semi-trailer coupled, and therefore, the tractor has been required to perform as a coupled vehicle. The engine output is determined as the driving performance relative to the weight including the semi-trailer, that is, the total weight of the connected vehicle.

As such, a tractor equipped with a high-output engine also requires a muffler that has a muffling effect in accordance with the engine output, that is, a muffler with a large capacity.

Generally, the attenuation of noise energy in a muffler is determined by the volume of the muffler and its ventilation resistance.

Therefore, in the case of a tractor with a short wheel base, that is, a semi-tractor, the installation space is limited and the volume of the muffler is limited, so there is no choice but to increase the part that relies on resistance.

This increases the resistance of the exhaust system, which is not desirable.

In addition, regarding the effective reduction of exhaust noise,
Japanese Patent No. 9733 discloses a structure for preventing low-frequency exhaust noise for automobiles.

This means that a Helmholtz filter is applied to the exhaust pipe at one-fifth or three-fifths of the total length of the exhaust pipe from the upstream end of the exhaust pipe.
A resonator is connected to attenuate low frequencies over a wide range of frequencies.In particular, in the illustrated structure, the Helmholtz resonator is attached to the exhaust pipe that connects the main muffler and sub-muffler. However, this does not take into account the muffler structure related to installation spades and the maximum and partial outputs of the engine.

The purpose of this invention is to arrange a muffler with a large capacity on a semi-trailer and a muffler with a small capacity on a tractor, so that they can correspond to the engine output, that is, the maximum output and partial output. A tractor that effectively reduces exhaust noise, prevents noise pollution caused by exhaust, and facilitates installation of a muffler on the tractor for both single-vehicle driving and combined driving with a semi-trailer connected to the tractor. The purpose is to provide a connected vehicle consisting of a semi-trailer.

With these issues in mind, the coupled vehicle of this invention has a muffler for single-vehicle running placed below the body of the tractor, a muffler for coupled running that is placed below the body of the semi-trailer and is larger than the muffler for single-vehicle running, and When the tractor travels in conjunction with the semi-trailer, the tractor is equipped with a heat-resistant flexible tube that allows the muffler for traveling in conjunction to be connected to the exhaust pipe of the muffler for traveling in a single-vehicle vehicle.

Hereinafter, preferred specific examples of the coupled vehicle according to this invention will be described with reference to the drawings.

Figures 1 and 2 show the tractor and semi-truck of this invention.
A specific example of a coupled vehicle consisting of a trailer is shown.

In this specific example, the semi-trailer 10 connects a king pin (not shown) attached to the front lower surface of the body 11 with a jaw mechanism of a coupler 31 attached to the rear of the body of the tractor 30. transmits traction and braking force.

Furthermore, in this tractor 30 and semi-trailer 10, the muffler 32 for single-vehicle running is arranged below the body of the tractor 30, the muffler 12 for coupled running is arranged below the body of the semi-trailer 10, and the When the semi-trailer 10 is connected and travels, the heat-resistant flexible tube 13 connects the muffler 12 for connected travel to the exhaust pipe 37 of the muffler 32 for single-vehicle travel.

That is, the semi-trailer 10 has a king pin (not shown) attached to the lower front surface of the body 11 of the semi-trailer 10 in order to have a part of the weight borne by the tractor 30, and wheels are attached to the rear of the body 11. 20, and is further provided with a landing gear (not shown) as an auxiliary leg when the semi-trailer 10 is left alone.

Below the body 11 of the semi-trailer 10, that is, at a position slightly in front of the wheels 20, a connecting muffler 12 is welded or bolted to brackets 14 and 15.

A heat-resistant flexible tube 13 made of metal or the like is connected to the front of the connecting muffler 12, and a connecting flange 16 is integrally attached to the tip of the flexible tube 13. ing.

Further, an exhaust pipe 17 is integrally connected to the rear of the connected traveling muffler 12.

A monocycle running mat 32 is attached below the body of the tractor 30, that is, at a position approximately midway between the front wheels 33 and rear wheels 34, and the front of the monocycle running muffler 32 is connected to an engine (not shown) through a connecting pipe 35. ), and an exhaust pipe 37 having a connecting flange 36 integrally attached to its tip is connected to the rear of the motorcycle muffler 32.

The exhaust pipe 37 of the monocycle running muffler 32 arranged on the tractor 30 in this way and the heat-resistant flexible tube 13 attached to the coupled running muffler 12 arranged on the semi-trailer 10 have their respective tips. The flanges 36 and 16 are joined via a packing 38, and are tightened and connected by bolts 39, 40 and nuts 41, 42.

Of course, the sizes of the muffler 32 for single-vehicle running where the tractor 30 is arranged and the muffler 12 for coupled running that is arranged on the semi-trailer 10 are the same as those of the muffler 32 for single-vehicle running and the muffler 12 for coupled running that is arranged on the semi-trailer 10. When the muffler 12 is connected, it is set to correspond to the engine output relative to the total weight of the connected vehicle, and in that case, the tractor 30
The size of the muffler 32 for single-vehicle running disposed in the vehicle is set according to the engine output for running only the tractor 30, and the muffler 32 for single-vehicle running is miniaturized.

In this way, the muffler 32 for single-vehicle running is manufactured to be small, but the muffler 12 for coupled running has an engine output relative to the total weight of the connected vehicle, that is, the maximum Depending on the engine output,
The size is determined, and the muffler 32 is manufactured to be larger than the muffler 32 for single-vehicle running.

In particular, since the semi-trailer 10 has a wide mounting space, the muffler 12 for connected traveling can be made sufficiently large, and such a large muffler 12 for connected traveling has extremely high exhaust resistance. It becomes smaller, and the silencing effect increases dramatically.

Therefore, when the tractor 30 and the semi-trailer 10 are connected and travel, the muffler 32 for single-vehicle travel and the muffler 12 for joint travel, which are arranged respectively, are connected,
Both of them perform the noise reduction function, and when the tractor 30 runs alone, the noise reduction function is performed only by the muffler 32 for single-vehicle running, which is miniaturized and arranged on the tractor 30.

According to this invention, the muffler, which is determined by the maximum engine output, is divided into a muffler for single-vehicle running and a muffler for coupled running, and the muffler for single-vehicle running is determined according to the engine output when only the tractor is running. The semi-trailer is connected to the tractor, and the muffler for the connected vehicle is manufactured to be large according to the maximum engine output in relation to the capacity of the muffler for traveling on a single vehicle. When the tractor is driven, the heat-resistant flexible tube connects the traction muffler to the traction muffler, so that the traction muffler connects to the tractor's body even though the tractor has a short wheel base. It can be easily mounted downward, thus improving the ease of mounting the muffler on the tractor, and the mounting can also be made larger for articulated running mufflers placed in semi-trailers with ample space. As a result, the ventilation resistance, that is, the exhaust resistance, becomes very small, and the noise reduction effect becomes large. Therefore, when the tractor runs in conjunction with a semi-trailer, the exhaust noise is sufficiently reduced, and the exhaust Noise pollution caused by noise is prevented.

[Brief explanation of the drawing]

Figure 1 is a side view of a combined vehicle consisting of a tractor and semi-trailer according to this invention, and Figure 2 is a section showing the connected state of the heat-resistant flexible tubes used in the combined vehicle shown in Figure 1. FIG. 10...Semi-trailer, 11...
Body, 12... Muffler for connected running, 13...
...Heat-resistant flexible tube, 30...
...Tractor, 32...Muffler for single-vehicle driving.

Claims (1)

[Scope of Claim for Utility Model Registration] A muffler for single-vehicle running placed below the body of a tractor, a muffler for connected running that is placed below the body of a semi-trailer and larger than the muffler for running a single-vehicle trailer, and A coupled vehicle equipped with a heat-resistant flexible tube that enables the connecting muffler to be connected to the exhaust pipe of the muffler for single-vehicle traveling when a semi-trailer is coupled to the vehicle.