JP2833443B2 - Vertical exhaust system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical exhaust device disposed on the back of a cab that can be tilted forward.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 9, a catalyst, a muffler 51 and the like are arranged in an exhaust passage connected to an exhaust manifold of an engine, and one exhaust pipe 52 connected to the muffler 51 is connected to a cab 53. The bracket 55 fixed to the chassis frame 54 is bent upward from the side behind the
There is known a vertical exhaust pipe 52 supported via a heat-resistant rubber or the like for absorbing vibration of an engine.

[0003]

Since the conventional vertical exhaust device is formed by a single exhaust pipe, its weight is heavy, and it is supported by a large bracket via heat-resistant rubber or the like. There has been a problem that the weight of the bracket becomes heavy, and a large space is required on the back of the cab, so that the mountability is deteriorated and the number of parts increases. Also,
There is a problem that the exhaust pipe becomes hot and there is a risk of burns.

Accordingly, the present invention has been made in view of the above-mentioned problems, and can be supported by a lightweight and small-sized bracket, a space behind a cab can be reduced, the mountability is good, and the number of parts is small. It is still another object of the present invention to provide a vertical exhaust device free from danger such as burns.

[0005]

According to the first aspect of the present invention,
A vertical exhaust pipe is arranged integrally with the cab on the side behind the cab that can be tilted forward, and the lower end of the exhaust pipe is attached to the end of the exhaust port of the exhaust path connected to the engine. The vertical exhaust pipe is fitted with a gap around the end of the vertical exhaust pipe, and the vertical exhaust pipe is disposed in the cab via a partition.

According to a second aspect of the present invention, an end portion of an exhaust port of an exhaust passage connected to an engine is disposed integrally with the cab on a side behind the cab that can be tilted forward, and a lower end of the exhaust pipe is connected to the engine. A vertical exhaust pipe fitted around the end of the exhaust path with a gap, an opening / closing lid disposed at the upper end opening of the vertical exhaust pipe, and opening / closing the opening / closing lid when used. The vertical exhaust device includes an opening / closing lid operating means that closes when used.

[0007]

According to the first aspect of the present invention, a vertical exhaust pipe is disposed integrally with the cab on the side behind the cab that can be tilted forward, and the lower end of the exhaust pipe is connected to an exhaust passage connected to the engine. The vertical exhaust pipe is arranged in the cab through a partition wall, so that air is inserted into the exhaust pipe from the gap. And the exhaust pipe cools down, making it difficult for engine vibration to be transmitted to the vertical exhaust pipe, reducing vibration and eliminating the need for a bracket that stands upright from the chassis frame as in the past, and the space behind the cab Since the exhaust pipe is accommodated in the partition wall, the exhaust pipe is not directly exposed to the outside, so that there is no danger of contact with the hot exhaust pipe and causing a burn or the like.

According to the second aspect of the present invention, the lower end of the exhaust pipe is disposed integrally with the cab on the side behind the cab that can be tilted forward, and the lower end of the exhaust pipe is connected to the end of the exhaust port of the exhaust passage connected to the engine. A vertical exhaust pipe fitted around the end of the exhaust path with a gap, an opening / closing lid disposed at the upper end opening of the vertical exhaust pipe, and opening / closing the opening / closing lid when used. Since the opening and closing lid actuating means is provided to be closed during use, foreign matter is prevented from entering the exhaust pipe.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a cab. The cab 1 is configured so that it can be tilted forward around a shaft 3 provided at a front end of a chassis frame 2. Cab 1
A vertical exhaust pipe 4 is fixed integrally with the cab 1 by a bracket 5 to the side behind.

An opening / closing lid 6 for preventing foreign matters such as rain from entering the inside of the exhaust pipe 4 is arranged at an opening at an upper end of the exhaust pipe 4. The opening / closing lid 6 is, as shown in FIG.
Is supported by a shaft 7a provided on a protruding piece 7 which is fixed to the upper end 4a of the upper end 4a so as to protrude rearward of the vehicle. A bearing portion 8 is provided at a rear end 6b of the opening / closing lid 6, and a shaft 8a is rotatably supported by the bearing portion 8. An upper end 9a of a rod 9 is connected to the shaft 8a, and a plunger 1 of a solenoid 10 as opening / closing lid operating means is connected to a lower end 9b of the rod 9.
1 are connected.

The solenoid 10 is arranged inside a solenoid box 12 supported by the exhaust pipe 4. In order to prevent abnormal operation of the solenoid 10 due to heat of the exhaust pipe 4, a heat insulator (not shown) is attached to the inner wall surface of the solenoid box 12. The solenoid 10 is connected to control means 16 for controlling the operation of the solenoid 10 based on an on / off signal of a main switch 17. When an ON signal of the main switch 17 is input to the control means 16, the control means 16 considers that the engine is operating, excites the solenoid 10, and moves the rod 9 connected to the plunger 11 in FIG. Pull downward, swing the opening / closing lid 6 to the position shown by the imaginary line around the shaft 7a,
Open the upper end opening of the exhaust pipe 4. When the off signal of the main switch 17 is input to the control means 16, the control means 16
Assuming that the engine is not operating, the solenoid 10 is demagnetized. Therefore, the opening / closing lid 6 swings around the shaft 7 a by its own weight, and closes the upper end opening of the exhaust pipe 4.

As shown in FIG. 3, at the lower end of the exhaust pipe 4, a large diameter portion 13 having a larger diameter than other parts of the exhaust pipe 4 is integrally formed. The large-diameter portion 13 is connected to a muffler 14 provided in an exhaust path E of the engine, and is an end of an exhaust port 15 a of a substantially L-shaped L-shaped exhaust pipe 15 bent upward from behind the cab 1. Is fitted around the exhaust port 15a with a gap F therebetween. L-shaped exhaust pipe 15
Are supported and fixed to the chassis frame 2 by fixing members 16. At the end of the exhaust port 15a, a narrowed portion 1 having a smaller diameter than other portions is provided in order to increase the flow speed of the exhaust gas.
5b are formed. The length W1 at which the L-shaped exhaust pipe 15 and the exhaust pipe 4 overlap with each other does not interfere with the exhaust pipes 4 and 15 when the cab 1 is brought forward as shown by the phantom line in FIG. Thus, it is set to 65 mm or less.

Hereinafter, the flow of the exhaust gas will be described.

First, when the main switch 17 is turned on to start the engine, an ON signal is input from the main switch 17 to the control means 16, and as described above, the control means 16 excites the solenoid 10 and Jar 11
Is pulled downward, the opening / closing lid 6 swings about the shaft 7a, and the upper end opening of the exhaust pipe 4 is opened. The exhaust gas passes through a catalyst (not shown) and a muffler 14 provided in an exhaust passage E of the engine, reaches a throttle 15b of the L-shaped exhaust pipe 15, and its flow velocity is increased by the throttle 15b. At this time, since the exhaust gas is blown out from the exhaust port 15a, the inside of the exhaust pipe 4 becomes a negative pressure, and the L-shaped exhaust pipe 15
3 flows into the exhaust pipe 4 through the gap F as indicated by an arrow X in FIG. Therefore, the exhaust gas is discharged into the atmosphere from the opening at the upper end of the exhaust pipe 4 while being cooled by the air having flown at that temperature. In the above-described embodiment, the opening / closing lid operating means is connected to the solenoid 10
However, it is needless to say that it may be constituted by an appropriate means such as a motor.

FIG. 4 shows another vertical exhaust pipe 40.

The exhaust pipe 40 has a small-diameter portion 41 for blowing exhaust gas from the engine inside a large-diameter portion 43 integrally formed at a lower end thereof. The small-diameter portion 41 has a narrowed portion 41b having a smaller diameter than other portions at an upper end thereof, and a bellows 42 made of stainless steel at a lower end thereof.
An exhaust port 41a for blowing exhaust gas into the exhaust pipe 40 is formed at an end of the throttle section 41b.

As shown in FIG. 5, the large-diameter portion 43 is fitted around the end of the exhaust port 41a of the small-diameter portion 41 with a gap therebetween, and is fixed to the inner peripheral surface of the large-diameter portion 43. The small diameter portion 41 is supported by the member 44. At the lower end of the bellows portion 42 of the small diameter portion 41, a skirt portion 42a extending downward is integrally formed, and an upper end portion 45a of an exhaust pipe 45 connected to a muffler (not shown) is slightly inserted into the skirt portion 42a. .

Even when the cab is moved from the state shown in FIG. 4 to the forward leaning state shown in FIG. 6, the large-diameter portion 43 and the small-diameter portion 41 'do not interfere with each other. The wrapping length W2 can be set to 100 mm or more. With such a configuration, the exhaust gas does not flow backward from the gap between the large diameter portion 43 and the small diameter portion 41. Further, a bellows portion 42 is provided at the lower end of the small diameter portion 42.
The shock generated between the exhaust pipe 45 and the exhaust pipe 40 is absorbed by the bellows portion 42 when the cab is returned from the forward tilted state to the state shown in FIG. .

FIG. 7 shows another embodiment. The vertical exhaust pipe 4 shown in this embodiment has the same configuration as that of the exhaust pipe 4 shown in the above-described embodiment, and therefore the same reference numerals are given and the description thereof will be omitted. Hereinafter, only the differences will be described.
In FIG. 7, reference numeral 100 denotes a cab. Cab 100
Behind the partition wall 10 so as to surround the exhaust pipe 4.
An exhaust pipe room 101 partitioned by 2 is formed integrally with the cab 100. As shown in FIG. 8, the exhaust pipe room 101 is formed by a partition 102 having a substantially triangular cross section, and heat of the exhaust gas is
The heat insulating material 103 is stuck so as not to be transmitted to the inside of the "0". FIG. 8 shows the opening / closing lid 6 and the bracket 5 for convenience.
The illustration of the opening / closing lid operating means is omitted. Partition wall 102
A maintenance door 104 such as the exhaust pipe 4 and the opening / closing lid 6 is provided on a part of the side facing the top 102a. The flow of the exhaust gas of this embodiment is the same as that of the above-described embodiment, and the description thereof will be omitted.

[0020]

As described above, according to the first aspect of the present invention, a vertical exhaust pipe is arranged integrally with the cab on the side behind the cab that can be tilted forward, and At the lower end, at the end of the exhaust port of the exhaust path connected to the engine,
Fitted with a gap around the end of the exhaust port, and the vertical exhaust pipe was arranged in the cab via a partition,
Air flows into the exhaust pipe from the gap, the exhaust pipe is cooled,
Not only is there no danger of burns, but also the vibration of the engine is reduced, the weight of the vertical exhaust system is reduced, the size of the brackets is reduced, the space behind the cab can be reduced, the mountability is improved, and parts are improved. Points are reduced.

According to the second aspect of the present invention, the cab is disposed integrally with the cab on the side behind the cab that can be tilted forward, and the lower end of the exhaust pipe is connected to the exhaust port of the exhaust passage connected to the engine. At the end, a vertical exhaust pipe fitted with a gap around the end of the exhaust path, an open / close lid arranged at the upper end opening of the vertical exhaust pipe, and open / close the open / close lid when used. In addition, since there is provided an opening / closing lid operating means that closes when not in use, foreign matter can be prevented from entering the exhaust pipe.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a vehicle equipped with a vertical exhaust device according to an embodiment of the present invention.

FIG. 2 is an enlarged front view of a main part showing an opening / closing lid of the vertical exhaust device shown in FIG.

FIG. 3 is an enlarged front view of a partial cross section showing a lower part of the vertical exhaust device shown in FIG.

FIG. 4 is an enlarged front view of a partial cross section showing another vertical exhaust device.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a front view showing the vertical exhaust device in a state where the cab shown in FIG. 1 is tilted forward.

FIG. 7 is a partial cross-sectional front view of a main part of a vehicle equipped with a vertical exhaust device according to another embodiment of the present invention.

FIG. 8 is a plan view of a partial cross section of FIG. 7;

FIG. 9 is a front view of a main part of a vehicle equipped with a conventional vertical exhaust device.

[Explanation of symbols]

 1,100 Cab 2 Chassis frame 3 Shaft 4 Vertical exhaust pipe 5 Bracket 6 Opening / closing lid 7 Protrusion 8 Bearing 9 Rod 10 Solenoid as opening / closing lid operating means 11 Plunger 12 Solenoid box 13 Large diameter section 14 Muffler 15 L-shaped Exhaust pipe 15a Exhaust port 15b Throttle section 16 Control means 17 Main switch 101 Exhaust pipe room 102 Partition wall 103 Heat insulating material 104 Door E Exhaust path F Gap

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Yamamura 5-33-8 Shiba, Minato-ku, Tokyo / Inside Mitsubishi Motors Corporation (72) Inventor Kunio Tomura 5-33 Shiba, Minato-ku, Tokyo No. 8 Inside Mitsubishi Motors Corporation (72) Shoichi Yoshikawa 5-33-8 Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation (72) Inventor Yukio Kobayashi Shibago, Minato-ku, Tokyo No. 33-8, Mitsubishi Motors Corporation (72) Inventor Noboru Hattori10, Okura-cho, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Mitsubishi Tokyo Engineering Co., Ltd.Tokyo Office (72) Inventor Tomoji Yoshizawa, Kanagawa (72) Inventor Osamu Okawara 10 Okuracho, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Ryo Motor Engineering Co., Ltd. Tokyo office (56) References JP-A-7-71249 (JP, A) Japanese Utility Model Showa 56-146622 (JP, U) Japanese Utility Model Showa 55-67313 (JP, U) Japanese Utility Model Showa 54-85212 (JP, U) JP-A-3-95023 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) F01N 7/20 F01N 3/02 F01N 7/08

Claims (2)

(57) [Claims] 1. A vertical exhaust pipe is integrally disposed on a side of a cab that can be tilted forward and backward, and a lower end of the exhaust pipe is connected to an end of an exhaust port of an exhaust passage connected to an engine. To
A vertical exhaust device which is fitted around an end of the exhaust port with a gap therebetween, and wherein the vertical exhaust pipe is disposed in the cab via a partition. 2. A cab that can be tilted forward and laterally behind the cab. The lower end of the exhaust pipe is connected to the end of an exhaust port of an exhaust passage connected to an engine. A vertical exhaust pipe fitted with a gap around the end; an open / close lid disposed at the upper end opening of the vertical exhaust pipe; an open / close lid that opens when the open / close lid is used and closes when not in use Vertical exhaust system comprising: