초록 ▼

A soundproof engine-driven operating machine has a small installation area, is easy to assemble and disassemble, and has superior cooling effects. The soundproof engine-driven operating machine includes an engine, an operating machine main body that is driven by the engine, a base frame that support

A soundproof engine-driven operating machine has a small installation area, is easy to assemble and disassemble, and has superior cooling effects. The soundproof engine-driven operating machine includes an engine, an operating machine main body that is driven by the engine, a base frame that supports the engine and the operating machine main body in a vibration-proof structure, and a case fitted to the base frame and accommodating the engine and the operating machine main body. One part of the case includes a first-story chamber accommodating the engine and the operating machine main body, first and second heat exchangers, each having a cooling fan and being arranged above the first-story chamber, the first and second heat exchangers performing heat conversion relating to the operation of the engine by using the cooling fans, arranged separately in a ventilation path, and a second-story chamber accommodating a muffler for discharging engine air. The part of the case is formed from a structural frame that is provided on the base frame. A cover is secured to the base frame, and covers the entire structural frame.

대표청구항 ▼

What is claimed is: 1. A soundproof engine-driven operating machine comprising: an engine; an operating machine main body driven by the engine; a base frame supporting the engine and the operating machine main body in a vibration-proof structure; a case fitted to the base frame and accommodating th

What is claimed is: 1. A soundproof engine-driven operating machine comprising: an engine; an operating machine main body driven by the engine; a base frame supporting the engine and the operating machine main body in a vibration-proof structure; a case fitted to the base frame and accommodating the engine and the operating machine main body; part of the case including a first-story chamber accommodating the engine and the operating machine main body, first and second heat exchangers, each having a cooling fan and being arranged above the first-story chamber, the first and second heat exchangers performing heat conversion relating to the operation of the engine by using the cooling fans, arranged separately in a ventilation path, and a second-story chamber accommodating a muffler for discharging engine air, the part of the case being comprised from a structural frame provided on the base frame; the first-story chamber and the second-story chamber being connected by a ventilation path supplying cooling wind for the second heat exchanger from the first-story chamber; the second-story chamber having a ventilation path discharging cooling winds, passing through the first and second heat exchangers and cooling the muffler, to the outside. 2. The engine-driven operating machine according to claim 1, wherein the engine has a centrifugal fan at the end of a rotating axis, driven by a pulley and a fan belt using a crank axis; the centrifugal fan is enclosed by a wind duct, having an inlet facing the engine and a outlet facing the second heat exchanger. 3. The engine-driven operating machine according to claim 1, further comprising a partition extending over the outer periphery of the operating machine main body, and forming a ventilation path between the bottom and both sides of the operating machine main body. 4. The engine-driven operating machine according to claim 1, further comprising a cover secured to the base frame, and covering the structural frame forming part of the case. 5. The engine-driven operating machine according to claim 4, wherein a side wall of the cover has an inlet hole for supplying cooling wind to the first heat exchanger and the second heat exchanger, a top face of the cover has an outlet hole discharging exhaust wind from the muffler to the outside, and the inside of the top face of the cover has a flexible member directly contacting the top of the structural frame. 6. The engine-driven operating machine according to claim 4, wherein the cover has a door containing a ventilation duct, the ventilation duct having at one end an inlet hole connecting to the outside, and, at another end, an outlet hole connecting to the inside of the structural frame. 7. The engine-driven operating machine according to claim 1, wherein the cooling fan is arranged to suck in air from the side of the second-story chamber.