Industrial vehicle

Patent metadata

Field	Value
Publication number	US-9855838-B2
Application number	US-201415500946-A
Country	US
Kind code	B2
Filing date	Aug 21, 2014
Priority date	Aug 21, 2014
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

An engine exhaust system is accommodated in a counterweight portion while minimizing a change in an existing arrangement of an engine, a radiator, a radiator fan, and the counterweight portion. A body has a work device provided at the front and the counterweight portion at the rear. A ventilation path provided in the counterweight portion includes an elevated part formed between a bottom of a front portion and a bottom of a rear portion. An exhaust gas purification device and a muffler, both having a tube-like outer shape, are disposed in the rear portion of the ventilation path so as to be positioned one above the other with the purification device lying above the muffler. Pipes, which extend straight respectively from an end circumferential surface of the purification device and an end circumferential surface of the muffler toward each other, are connected via flanges.

First claim

The invention claimed is:

1. An industrial vehicle comprising:
a work device attached at a front of a body;
a counterweight portion for balancing a load on the work device, the counterweight portion being disposed at a rear of the body and having a ventilation path provided therein so as to extend in a front rear direction of the body;
an engine attached to the body as a power source and disposed forward from the counterweight portion;
a radiator disposed rearward from the engine so as to be positioned immediately before a front end opening of the ventilation path or at a front portion of the ventilation path;
a radiator fan for cooling the radiator, the radiator fan being disposed between the engine and the radiator and allowing an airflow generated by rotation of the radiator fan to be exhausted to the outside of the body through the ventilation path;
an exhaust pipe supported by the body, connected to the engine at one end, and protruding from the rear of the body to the outside at the other end; and
an exhaust gas purification device and a muffler provided at some positions along the exhaust pipe, wherein,
both the exhaust gas purification device and the muffler have a tube-like outer shape and are disposed rearward from the radiator in the ventilation path, either one above the other or side by side in a right-left direction of the body, and
pipes extend straight respectively from end circumferential surfaces of the exhaust gas purification device and the muffler toward each other and are connected via flanges.

2. The industrial vehicle according to claim 1 , wherein, between the radiator and the exhaust gas purification device, a windbreak plate for preventing the airflow from blowing onto the exhaust gas purification device is disposed so as to face the exhaust gas purification device, and has heat insulation properties.

3. The industrial vehicle according to claim 2 , wherein,
an elevated part is formed between bottoms of the front and rear portions of the ventilation path, whereby the bottom of the rear portion is lower than the bottom of the front portion,
the exhaust gas purification device and the muffler are disposed in the rear portion of the ventilation path so as to be positioned one above the other with the exhaust gas purification device lying above the muffler and at least partially protruding above the bottom of the front portion of the ventilation path, and
the windbreak plate is erected on the bottom of the front portion such that the windbreak plate has an upper end surface positioned higher than an upper end surface of the exhaust gas purification device.

4. The industrial vehicle according to claim 2 , wherein,
the exhaust gas purification device and the muffler are disposed one above the other with the exhaust gas purification device lying below the muffler, and
the windbreak plate is erected on the bottom of the ventilation path such that the windbreak plate has an upper end surface positioned higher than an upper end surface of the exhaust gas purification device.

5. The industrial vehicle according to claim 3 , wherein at least an upper portion of the windbreak plate is bent or curved toward the exhaust gas purification device.

6. The industrial vehicle according to claim 3 , wherein both the exhaust gas purification device and the muffler extend in the right-left direction of the body.

7. The industrial vehicle according to claim 2 , wherein,
an elevated part is formed between bottoms of the front and rear portions of the ventilation path, whereby the bottom of the rear portion is lower than the bottom of the front portion,
the exhaust gas purification device and the muffler are disposed in the rear portion of the ventilation path so as to be positioned side by side in the right-left direction of the body, with the exhaust gas purification device at least partially protruding above the bottom of the front portion of the ventilation path, and
the windbreak plate is erected on the bottom of the front portion such that the windbreak plate has an upper end surface positioned higher than an upper end surface of the exhaust gas purification device.

8. The industrial vehicle according to claim 7 , wherein both the exhaust gas purification device and the muffler extend vertically.

9. The industrial vehicle according to claim 1 being a forklift.

Assignees

• Mitsubishi Nichiyu Forklift Co
• Mitsubishi Logisnext Co Ltd

Inventors

• Kawazoe Jun
• Takahashi Syunta

Classifications

• B60K13/04 Primary

  concerning exhaust · CPC title

• E02F9/0866

  Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment · CPC title

• B66F9/07513

  Details concerning the chassis · CPC title

• F01N13/14

  having thermal insulation {(exhaust manifolds F01N13/102)} · CPC title

• F01N2260/20

  for heat or sound protection, e.g. using a shield or specially shaped outer surface of exhaust device · CPC title