JP5060405B2 - Engine working machine - Google Patents

Description

  The present invention relates to an engine working machine, and more particularly to a structure of an exhaust chamber of an engine working machine that uses an engine to drive a working machine such as a generator.

2. Description of the Related Art Conventionally, in an engine working machine that drives a working machine such as a generator with an engine, various devices such as an engine, a working machine, a radiator, and a fan are housed in a casing for reducing noise. In such an engine work machine, a partition wall provided with a radiator is provided in the casing, one side of the partition wall serves as an engine room for housing the engine and work machine, and the other side is a high-temperature exhaust air from the radiator. Is used as an exhaust chamber for exhausting air from an exhaust port provided in the upper part of the casing, and a muffler constituting an exhaust pipe is disposed in the exhaust chamber (see, for example, Patent Documents 1 and 2). ).
JP 2000-88185 A (FIG. 1) Japanese Patent Laying-Open No. 2003-239758 (FIG. 10)

  However, conventionally, since the muffler is arranged on the front surface (exhaust side) of the radiator or above the radiator, the cooling air sucked from the intake port provided on the engine compartment side by the action of the fan is exhausted through the radiator. When exhausting from the exhaust port provided in the upper part of the room, there is a disadvantage that a muffler is present at a place where the exhaust air from the radiator passes, resulting in air resistance, or obstructing when cleaning the radiator. For this reason, there has been a problem that the volume of the exhaust chamber has to be increased in order to reduce the ventilation resistance or improve the cleaning performance.

  Accordingly, an object of the present invention is to provide an engine working machine capable of reducing the size of a casing without impairing the cooling effect of a radiator.

To achieve the above object, an engine working machine of the present invention, it is divided into an exhaust air chamber and the engine compartment by a wall outright specification in the casing in the vertical direction, to drive the working machine and the working machine in the engine compartment engine houses, said radiator is disposed in the exhaust air chamber side of the partition wall, and discharging the cooling air sucked from the intake port provided in the engine compartment side from the exhaust air port provided in the exhaust air chamber upper through the radiator, An engine working machine that extends an exhaust pipe from the engine through the partition wall into the exhaust chamber and exhausts the exhaust to the outside of the casing through a muffler provided in the exhaust chamber. as well as the arrangement of the downward heat member shielding between the muffler and the lower tank provided, shielding heat member includes a mounting piece mounted by bolts to the exhaust air chamber side wall face of the partition wall, A lower heat shield portion that horizontally bends from the upper end of the mounting piece to the side opposite to the engine chamber and covers the lower side of the lower tank, and bends upward in the vertical direction from the tip of the lower heat shield portion so that the exhaust chamber side of the lower tank is A heat insulating part including a side heat insulating part to cover, and a heat insulating material is closely arranged between the lower heat insulating part and the side heat insulating part of the heat insulating part and the lower tank, and the side heat insulating part the upper end parts, characterized in that by extending the heat radiating portion obliquely upward until exhaust air hits the position of the radiator at a position above the muffler, be provided with a plurality of vent before Symbol radiator portion It can, or, on the opposite surfaces of the radiator before Symbol exhaust air chamber may be provided an inclined plate which is inclined in a direction away from the radiator toward the bottom to top.

According to the engine working machine of the present invention, since the muffler is disposed below the lower tank of the radiator, there is no resistance when the exhaust air from the radiator is discharged from the exhaust port, and when the radiator is washed It won't get in the way. Further, by providing a heat shield member having a heat shield part and a heat radiating part between the muffler and the lower tank, it is possible to prevent the engine coolant in the lower tank from being heated by the heat of the muffler, and by the exhaust air of the radiator Since heat can be radiated from the heat radiating portion, the heat shield member does not become high temperature, and sufficient heat shield properties can be maintained for a long time. Thereby, since the muffler can be disposed close to the lower tank, the volume of the exhaust chamber can be reduced, and the casing can be reduced in size by the amount of the reduced volume of the exhaust chamber. In addition, since the exhaust air of the radiator can be guided in the direction of the upper air outlet by the heat radiating portion extending obliquely upward, hot air does not stay in the lower part of the air exhaust chamber.

  Furthermore, by disposing a heat insulating material between the heat shield member and the lower tank, it is possible to more reliably suppress an increase in the temperature of the cooling water in the lower tank. In addition, by providing a plurality of ventilation parts in the heat radiating part, the exhaust air of the radiator can be applied to the muffler arranged below the heat radiating part, and it is possible to prevent the muffler from excessively rising in temperature and Hot air does not stay in the lower part of the room.

  In particular, this is effective for a structure in which the radiator is arranged on the side of the air exhaust chamber of the partition wall, and by providing an inclined plate on the surface facing the radiator, the exhaust air of the radiator is reliably guided in the direction of the upper air outlet. can do.

  FIG. 1 to FIG. 5 are views showing an embodiment of the engine working machine according to the present invention. FIG. 1 is a sectional front view of a principal part of the engine working machine, FIG. 2 is a sectional plan view of the principal part, and FIG. FIG. 4 is an enlarged sectional view of a main part, and FIG. 5 is a perspective view of a protective member.

  This engine working machine 1 divides the inside of a casing 2 having a soundproof structure into an engine room 5 and a wind exhaust room 6 by a partition wall 4 provided with a radiator 3, and a generator, a compressor, A working machine such as a pump (not shown) and an engine 7 for driving the working machine are accommodated, and cooling air sucked from an intake port (not shown) provided on the engine chamber 5 side is passed through the radiator 3. It forms so that it may exhaust from the exhaust port 6a provided in the upper part of the exhaust chamber 6. FIG.

  The radiator 3 is disposed at the center of the partition wall 4 so as to protrude toward the exhaust chamber 6 and has a core 3a, an upper tank 3b, and a lower tank 3c as is well known. A cooling water outlet pipe 8 is connected to the upper tank 3 b, and a cooling water introduction pipe 9 is connected to the lower tank 3 c, and is connected to the engine 7 through the partition wall 4. Further, a fan 10 that is rotated by the engine 7 is provided on the engine chamber side of the core portion 3a, and a portion corresponding to the core portion 3a in the partition wall 4 is provided on a side wall portion of the engine chamber 5 of the casing 2. An opening for supplying cooling air sucked from the intake port (not shown) and blown by the fan 10 to the core portion 3a is formed.

  An exhaust pipe 11 for exhausting exhaust gas generated in the engine 7 passes through the upper part of the engine chamber 5, passes through the upper position of the radiator 3 on one side of the partition wall 4, and extends into the exhaust chamber 6. After exiting, it bends downward and connects to one end of a muffler 12 disposed at the lower portion of the exhaust chamber 6, rises upward from the other end of the muffler 12, and the end opens at the portion of the exhaust port 6a. .

  The muffler 12 is attached to the floor 13 of the exhaust chamber 6 below the lower tank 3c of the radiator 3, and a heat shield member 15 is interposed between the muffler 12 and the lower tank 3c via a heat insulating material 14. It is attached.

  The heat shielding member 15 is formed by bending a metal plate. The mounting piece 15a is attached to the partition wall 4 with bolts, and the upper end of the mounting piece 15a is bent forward (on the opposite side of the engine chamber) to the lower tank 3c. A heat shield 15d comprising a lower heat shield 15b that covers the lower side and a side heat shield 15c that bends upward from the tip of the lower heat shield 15b and covers the front side (exhaust chamber side) of the lower tank 3c. And a heat radiating portion 15e extending obliquely upward toward the front from the upper end of the heat shield portion 15d, that is, the upper end of the side heat shield portion 15c.

  The heat dissipating part 15e extends above the muffler 12 and in front of the core part 3a to a position where the exhaust air of the radiator 3 hits, and in the width direction of the heat dissipating part 15e, a ventilation part 15f made of a rectangular punched hole is provided. A plurality are formed at predetermined intervals.

  An inclined plate 16 that is inclined in a direction away from the radiator 3 from the lower part to the upper part is provided on the surface of the exhaust chamber 6 facing the radiator 3.

  According to the engine working machine 1 formed in this way, the muffler 12 is disposed below the lower tank 3c of the radiator 3, so that the muffler 12 is vented when the exhaust air from the radiator 3 is exhausted from the exhaust port 6a. There is no resistance, and the muffler 12 does not get in the way when the radiator 3 is cleaned. Further, the heat shielding portion 15d of the heat shielding member 15 can prevent the lower tank 3c of the radiator 3 from being heated by the heat from the muffler 12, and can prevent the cooling water temperature from rising. Furthermore, since the heat absorbed by the heat shield 15d can be dissipated from the heat radiating part 15e to which the exhaust air from the radiator 3 hits, sufficient heat shielding can be maintained for a long time.

  Therefore, even if the radiator 3 and the muffler 12 are arranged at positions close to each other, the cooling effect of the radiator 3 is not impaired, and the volume of the exhaust chamber 6 can be reduced and the casing 2 can be downsized. Further, since the heat radiating portion 15e is raised obliquely upward, the exhaust air from the radiator 3 can be guided toward the exhaust port 6a formed in the upper portion of the exhaust chamber 6.

  Furthermore, since the heat insulating material 14 is disposed between the heat shield 15d and the lower tank 3c, the lower tank 3c can be reliably insulated. Further, by forming a plurality of ventilation portions 15f in the heat dissipation portion 15e extending obliquely upward, the exhaust air of the radiator 3 can be applied to the muffler 12 disposed below the heat dissipation portion 15e. The temperature can be prevented from rising excessively, and hot air does not stay in the lower part of the exhaust chamber 6. Furthermore, by providing the inclined plate 16 on the surface facing the radiator 3, the exhaust air from the radiator 3 can be reliably guided in the direction of the upper exhaust port 6a.

  In this embodiment, the radiator is disposed on the side of the exhaust chamber of the partition wall. However, even when the radiator is disposed on the side of the engine chamber of the partition wall, a muffler is provided by providing the same heat shield member as described above. Even if it is arranged close to the lower side of the radiator, the cooling effect of the radiator is not impaired, and the size can be reduced.

It is a principal part section elevation view of the engine working machine which shows one example of the present invention. It is a principal part sectional top view similarly. It is a principal part sectional side view similarly. It is a principal part expanded sectional view similarly. It is a perspective view of a heat shield part similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Engine working machine, 2 ... Casing, 3 ... Radiator, 3a ... Core part, 3b () ... Upper tank, 3c ... Lower tank, 4 ... Partition wall, 5 ... Engine chamber, 6 ... Exhaust chamber, 6a ... Exhaust port , 7: engine, 8 ... cooling water outlet pipe, 9 ... cooling water inlet pipe, 10 ... fan, 11 ... exhaust pipe, 12 ... muffler, 13 ... floor bases, 14 ... heat insulating material, 15 ... heat insulating member, 15a ... Mounting piece, 15b ... lower heat shield, 15c ... side heat shield, 15d ... heat shield, 15e ... heat sink, 15f ... vent, 16 ... inclined plate

Claims (3)

Is divided into an exhaust air chamber and the engine compartment by a wall outright specification in the casing in the vertical direction, and houses the engine for driving the working machine and the working machine in the engine compartment, the radiator exhaust air chamber side of the partition wall arrangement, and then discharging the cooling air sucked from the intake port provided in the engine compartment side from the exhaust air port provided in the exhaust air chamber upper through the radiator, the exhaust pipe from the engine is passed through the partition wall In the engine working machine that extends into the exhaust chamber and exhausts outside the casing through a muffler provided in the exhaust chamber.
While arranging the muffler below the lower tank of the radiator,
Heat member shielding between the muffler and the lower tank provided,
The heat shield member includes a mounting piece attached to the side wall surface of the wind exhaust chamber of the partition wall with a bolt, and a lower shield covering the lower side of the lower tank by bending in the horizontal direction from the upper end of the mounting piece to the side opposite to the engine room. A heat shield part comprising a heat part and a side heat shield part that is bent upward in the vertical direction from the tip of the lower heat shield part and covers the exhaust chamber side of the lower tank,
A heat insulating material is closely arranged between the lower heat shield and the side heat shield of the heat shield and the lower tank,
An engine work machine , wherein a heat radiating portion is extended obliquely upward to a position where the exhaust air of the radiator hits the upper end of the side heat shield portion at a position above the muffler . The engine work machine according to claim 1, wherein a plurality of ventilation portions are provided in the heat radiation portion . The engine working machine according to claim 1 or 2, wherein an inclined plate that is inclined in a direction away from the radiator from the lower part toward the upper part is provided on a surface of the exhaust air chamber facing the radiator .

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