A fuel-tank-equipped working machine is provided, which is capable of securing a fuel tank to be large in a state where the fuel-tank-equipped working machine is secured to be compact. A generator 10 as a working machine includes a fuel tank 25 supported at an outer case 12. The working machine 10 includes a tank opening 35 that is formed at the outer case 12, a mounting concave portion 38 that is formed on the fuel tank 25, and a cushion portion 37 that is capable of being housed in the mounting concave portion 38. The tank opening 35 is formed so as to be able to expose an upper half part 25a of the fuel tank 25 to an outside 14 of the outer case 12. Further, the cushion portion 37 has a fitting groove 63 capable of being fitted to an opening rim 36 of the tank opening 35.

A work machine that can discharge water collected inside a casing to the outside, reduce leakage of noise, and reduce entry of foreign matter from outside. The work machine includes a bottom portion cover forming a portion of a casing, and the bottom portion cover includes: at least two ribs and a bead (strengthening structure portions) that are formed substantially perpendicular to a bottom surface of the bottom portion cover; and a drain hole located in a connecting portion connecting the bottom surface of the bottom portion cover and a water-discharging rib among the at least two ribs. An upper portion of the water-discharging rib is located over the drain hole.

A power generation device capable of ensuring assemblability and ensuring strength/rigidity necessary when being handled, and having reduced size and weight, without using a reinforcement frame. The power generation device includes, in a casing, an alternator that generates power through driving of an engine, an inverter case that houses an inverter of the alternator, and a fuel tank that stores fuel for the engine. The device includes an upper fixing part that fixes an upper part of the fuel tank to the casing, an intermediate fixing part that fixes a lower part of the fuel tank to an upper part of the inverter case, and a lower fixing part that fixes a lower part of the inverter case to the casing.

In the power generator, an alternator driven by an engine to generate power, an inverter for the alternator, a fan to cool the engine, and a shroud via which air blown by the fan is guided to a periphery of the engine are stored inside of a casing. A fan cover that covers the alternator and the fan is provided in an end portion of the shroud, a ventilating opening is formed in an end portion of the fan cover, and an inverter supporter in which the inverter is installed is provided in a circumferential edge portion of the ventilating opening.

A portable generator set (1) comprises an engine (6), a generator (7), a fuel tank (8), and a housing (5). The engine (6), the generator (7), and the fuel tank (8) are accommodated in the housing (5). The fuel tank (8) is constructed by a fuel tank housing (805), a fuel tank port (801), a fuel tank cap (802), and a fuel tank top surface (808). A protrusion structure protruding outward is provided on the fuel tank top surface (808). A hollow cavity (809) communicated with the inner cavity of the fuel tank (8) is formed on the inner side of the protrusion structure, such that fuel in the fuel tank (8) can enter the hollow cavity (809) when the generator set (1) is obliquely reclined. The generator set can be obliquely reclined, thereby improving security and facilitating transportation and storage of the generator set.

A portable generator set (1) comprises an engine (6), a generator (7), a fuel tank (8), and a housing (5). The engine (6), the generator (7), and the fuel tank (8) are accommodated in the housing (5). The fuel tank (8) is constructed by a fuel tank housing (805), a fuel tank port (801), a fuel tank cap (802), and a fuel tank top surface (808). A protrusion structure protruding outward is provided on the fuel tank top surface (808). A hollow cavity (809) communicated with the inner cavity of the fuel tank (8) is formed on the inner side of the protrusion structure, such that fuel in the fuel tank (8) can enter the hollow cavity (809) when the generator set (1) is obliquely reclined. The generator set can be obliquely reclined, thereby improving security and facilitating transportation and storage of the generator set.

In the power generator, an alternator driven by an engine to generate power, an inverter for the alternator, a fan to cool the engine, and a shroud via which air blown by the fan is guided to a periphery of the engine are stored inside of a casing. A fan cover that covers the alternator and the fan is provided in an end portion of the shroud, a ventilating opening is formed in an end portion of the fan cover, and an inverter supporter in which the inverter is installed is provided in a circumferential edge portion of the ventilating opening.

The power generator includes: an alternator for generating electricity by driving an engine; an inverter case containing an inverter circuit of the alternator; a fuel tank for storing a fuel to be supplied to the engine; and a casing for housing at least the engine, the alternator and the inverter case, wherein the inverter case and the fuel tank are formed of a material having higher thermal conductivity than the casing, and the inverter case is disposed in contact with the fuel tank.

A work machine that can discharge water collected inside a casing to the outside, reduce leakage of noise, and reduce entry of foreign matter from outside. The work machine includes a bottom portion cover forming a portion of a casing, and the bottom portion cover includes: at least two ribs and a bead (strengthening structure portions) that are formed substantially perpendicular to a bottom surface of the bottom portion cover; and a drain hole located in a connecting portion connecting the bottom surface of the bottom portion cover and a water-discharging rib among the at least two ribs. An upper portion of the water-discharging rib is located over the drain hole.

A fuel-tank-equipped working machine is provided, which is capable of securing a fuel tank to be large in a state where the fuel-tank-equipped working machine is secured to be compact. A generator 10 as a working machine includes a fuel tank 25 supported at an outer case 12. The working machine 10 includes a tank opening 35 that is formed at the outer case 12, a mounting concave portion 38 that is formed on the fuel tank 25, and a cushion portion 37 that is capable of being housed in the mounting concave portion 38. The tank opening 35 is formed so as to be able to expose an upper half part 25a of the fuel tank 25 to an outside 14 of the outer case 12. Further, the cushion portion 37 has a fitting groove 63 capable of being fitted to an opening rim 36 of the tank opening 35.