Engine-driven working machine

Patent metadata

Field	Value
Publication number	US-10224783-B2
Application number	US-201715454489-A
Country	US
Kind code	B2
Filing date	Mar 9, 2017
Priority date	Mar 16, 2016
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

An engine-driven working machine capable of favorably reducing exhaust sound (that is, noise) is provided. An engine-driven working machine 10 is a generator in which an engine 15 and a muffler 67 are housed in an inside 13 of an outer case 12. The generator 10 includes a tail pipe 68 that is provided at a lower portion 67a of the muffler 67, a discharge port 37 that is disposed above the tail pipe 68, and a baffle plate 84 that is disposed to face the discharge port 37. The discharge port 37 is formed in the outer case 12. Further, cooling air that is sent from a cooling fan 17 is guided to below the muffler 67 with the baffle plate 84.

First claim

What is claimed is:

1. An engine-driven working machine in which an engine and a muffler are housed in an inside of an outer case, comprising:
a tail pipe that is provided at a lower portion of the muffler and communicates with the muffler;
a discharge port that is disposed above an exhaust port of the tail pipe, and is formed in the outer case;
a protector that covers the muffler and the tail pipe and has an opening disposed to face the discharge port; and
a baffle plate that is disposed to face the discharge port, extends downward, and a lower end of the baffle plate is located in a vicinity of an upper end of the muffler so as to guide cooling air, which is sent from a cooling fan to below the muffler, and
the exhaust port of the tail pipe is arranged to be opened upward at a lower part of a space partitioned by the protector and the baffle plate.

2. The engine-driven working machine according to claim 1 , further comprising:
a sound absorbing member that is provided on an inner surface of the protector.

3. The engine-driven working machine according to claim 1 ,
wherein in the tail pipe,
an exhaust port of the tail pipe is opened to intersect an opening direction of the discharge port.

4. The engine-driven working machine according to claim 2 ,
wherein in the tail pipe,
an exhaust port of the tail pipe is opened to intersect an opening direction of the discharge port.

Assignees

• Honda Motor Co Ltd

Inventors

• Koyama Hiroshi
• Kai Masashi

Classifications

• H02K5/24 Primary

  specially adapted for suppression or reduction of noise or vibrations · CPC title

• F01P1/06

  Arrangements for cooling other engine or machine parts · CPC title

• F01N13/002

  Apparatus adapted for particular uses, e.g. for portable devices driven by machines or engines · CPC title

• F01P5/06

  Guiding or ducting air to, or from, ducted fans · CPC title

• F01N2590/06

  for hand-held tools or portables devices · CPC title