JP6667961B2 - Engine working machine - Google Patents

Description

  The present invention relates to an engine working machine, and more specifically, includes a working machine in a casing, an engine that drives the working machine, a radiator that cools cooling water of the engine, and a muffler connected to an exhaust pipe of the engine. Related to engine working machines.

  2. Description of the Related Art Conventionally, in an engine working machine in which a working machine such as a generator is driven by an engine, various devices such as an engine, a working machine, a radiator, and a muffler are housed in a casing for reducing noise. In such a muffler for an engine working machine, a muffler attached via a bracket attached to an inner wall of a casing or a pair of plate-shaped brackets protruding from both sides of a radiator is used. There has been one that is mounted via an intermediary (for example, see Patent Document 2).

JP 2000-97039 A JP 2015-34496A

  However, in the case of Patent Literature 1, heat of the muffler is transmitted to the casing via the bracket, and there is a risk of burns when an operator touches the casing. Further, in the case of Patent Document 2, the heat of the muffler was difficult to escape, and the soundproofing was not good.

  Accordingly, an object of the present invention is to provide an engine working machine which suppresses transmission of heat of a muffler to a casing and has excellent soundproofness.

  In order to achieve the above object, the engine working machine of the present invention is provided with a partition wall provided with a radiator inside a casing, and one side of the partition wall is used as an engine room for accommodating the engine and the working machine, and the other side. The exhaust air from the radiator is exhausted from an exhaust port provided at the lower part of the casing, and the engine working machine is an exhaust chamber that houses a muffler that forms an exhaust pipe. The bracket is attached to a provided bracket, the bracket includes a pair of mounting arms protruding from both sides of the radiator to the exhaust chamber side, and a connecting plate connecting lower ends of the mounting arms, and each of the mounting arms The upper end has a horizontally extending flange portion to which the muffler is attached, and the lower end is formed so as to be gradually inclined toward the upper end from the radiator side toward the tip. Connecting plate is characterized in that it is provided in an inclined along the inclination of the lower portion.

  ADVANTAGE OF THE INVENTION According to the engine working machine of this invention, since the bracket which attaches a muffler does not contact a casing, it can suppress that the heat of a muffler is transmitted to a casing. Further, the exhaust air from the radiator passes between the mounting arm of the bracket and the connecting plate, is guided to the lower side of the casing, and can be exhausted to the outside through the exhaust port. On the other hand, the noise is reflected by the inclined plate of the bracket toward the ceiling of the exhaust chamber, so that the noise can be suppressed from leaking outside through the exhaust port.

It is a sectional front view of an engine working machine showing an example of an embodiment of the present invention. It is a sectional plan view of an engine working machine similarly. It is a sectional side view of an engine working machine similarly. It is a principal part perspective view of an engine working machine similarly.

  FIGS. 1 to 3 show an embodiment of an engine working machine according to the present invention. In the engine working machine 1, an inside of a casing 2 having a soundproof structure is formed by a partition wall 2 a having a radiator 3 in an engine room. A working machine 6 such as a generator, a compressor, and a pump, and an engine 7 for driving the working machine 6 are housed in the engine room 4. Cooling air sucked from an intake port (not shown) provided is exhausted from an exhaust port provided below the exhaust chamber 5 via a radiator 3.

  The radiator 3 is provided on the engine room 4 side from the ventilation square opening formed at the center of the partition wall 2a, and a cooling water introduction pipe 9 is connected to an upper part and a cooling water discharge pipe 10 is connected to a lower part. . A bracket 11 protrudes from the radiator 3 on the side of the exhaust chamber, and a muffler 12 is attached to the bracket 11. An opening is formed in the partition wall 2a to supply cooling air, which is sucked from an intake port provided in the engine chamber 4 and blown by the fan 8 rotated by the engine 7, to the exhaust chamber side.

  The bracket 11 includes a pair of mounting arms 11a, 11a protruding from both sides of the radiator 3 toward the exhaust chamber, and a connecting plate 11b connecting lower ends of the mounting arms 11a, 11a. Each mounting arm 11a has a horizontally extending flange portion 11c for attaching the muffler 12 formed at an upper end portion, and a lower end portion 11d which is gradually inclined toward the upper end portion from the radiator side toward the tip end. Have been. The connecting plate 11b is provided in an inclined state along the inclination of the lower ends 11d, 11d of the mounting arms 11a, 11a.

  The muffler 12 is attached to the bracket 11 by attachment members 13, 13 formed in an L shape. An exhaust pipe 14 for discharging exhaust gas generated by the engine 7 extends from above the engine 7 through the position above the partition wall 2a to the exhaust chamber 5, is connected to one end of the muffler 12, and is connected to one end of the muffler 12. It rises upward from the end, and the tip protrudes outside from the ceiling surface of the casing 2.

  According to the engine working machine 1 formed as described above, since the bracket 11 for attaching the muffler 12 is not in contact with the casing 2, it is possible to suppress the heat of the muffler 12 from being transmitted to the casing 2. As shown in FIG. 1, the exhaust air A from the radiator 3 passes through a space formed between the mounting arms 11a, 11a of the bracket 11 and the connecting plate 11b, is guided downward, and is exhausted. Can be discharged to the outside. On the other hand, the noise B is reflected by the connecting plate 11b of the bracket 11 in the direction of the ceiling of the exhaust chamber 5, so that the noise can be suppressed from leaking outside from the exhaust port.

  DESCRIPTION OF SYMBOLS 1 ... Engine working machine, 2 ... Casing, 2a ... Partition wall, 3 ... Radiator, 4 ... Engine room, 5 ... Ventilation room, 6 ... Working machine, 7 ... Engine, 8 ... Fan, 9 ... Cooling water outlet pipe, DESCRIPTION OF SYMBOLS 10 ... Cooling water introduction pipe, 11 ... Bracket, 11a ... Mounting arm, 11b ... Connecting plate, 11c ... Flange part, 11d ... Lower end part, 12 ... Muffler, 13 ... Mounting member, 14 ... Exhaust pipe

Claims (1)

A partition wall with a radiator is provided inside the casing, one side of the partition wall is used as an engine room for accommodating an engine and a working machine, and the other side is provided with exhaust air from the radiator through an exhaust port provided at a lower portion of the casing. In the engine working machine which exhausted and made an exhaust chamber that contained a muffler that composes an exhaust pipe,
The muffler is attached to a bracket provided on the exhaust chamber side of the radiator,
The bracket includes a pair of mounting arms projecting from both sides of the radiator to the exhaust chamber side, and a connecting plate connecting the lower ends of the mounting arms,
Each of the mounting arms has a horizontally extending flange portion for attaching the muffler to an upper end portion, and a lower end portion is formed to be gradually inclined toward the upper end portion from the radiator side toward the tip end, The engine working machine according to claim 1, wherein the connecting plate is provided in a state of being inclined along an inclination of the lower end.

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