CN210530978U

CN210530978U - Portable contravariant gasoline generating set

Info

Publication number: CN210530978U
Application number: CN201921307278.8U
Authority: CN
Inventors: 陈维加
Original assignee: Suzhou Tiger Power Machine Co ltd
Current assignee: Suzhou Tiger Power Machine Co ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-05-15
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses a portable contravariant gasoline generator set, which comprises a shell and an engine assembly arranged in the shell, wherein the engine assembly comprises an engine, a generator, a carburetor arranged on an engine cylinder head and an air filter connected with the carburetor; the engine assembly is characterized in that the shell comprises a rectangular enclosure frame which is enclosed by a front enclosure shell, a rear enclosure shell, a left side plate and a right side plate and is fixed by adopting a connecting piece, and an oil tank which is fixed at the top of the rectangular enclosure frame, wherein a plurality of upper supporting tubes and a plurality of lower supporting tubes are fixed between the left side plate and the right side plate; an air filter is fixedly or integrally arranged on one of the left side plate and the right side plate close to the carburetor, and an air outlet of the air filter is connected with an air inlet of the carburetor through an elastic hose. The utility model discloses cancelled current interior support frame, accumulated tolerance diminishes between the part, and whole change is in the assembly, and has better anti-seismic performance and job stabilization nature.

Description

Portable contravariant gasoline generating set

Technical Field

The utility model relates to a portable contravariant gasoline generating set.

Background

The portable internal frame type inversion gasoline generating set is designed by enterprises for the purposes of simplifying assembly and facilitating maintenance, and is characterized in that an internal support frame which can be spliced quickly and used as a support framework is designed independently, an engine assembly, a front cover shell, a rear cover shell, a left side plate, a right side plate, a top oil tank and an air filter are fixed by the internal support frame, and a control panel for accommodating an inverter assembly is arranged on the front cover shell. The design enables the assembly of the whole generator set to be more convenient and faster, shortens the production time, saves the production cost and improves the production efficiency. And each part of the generator set is ensured to be independently configured, the internal structure is simplified, and the disassembly and maintenance are convenient.

However, in the continuous use process, the portable internal frame type inversion gasoline generator set is found to be exposed to the following problems:

1) due to the introduction of the inner support frame, the number of parts is large, so that the tolerance accumulation between the parts is increased, the assembly difficulty is correspondingly improved, and the prominent expression is as follows: the tolerance increase of the engine assembly and the side plate causes the deviation between the air filter and the side plate opening on the engine assembly and the side plate opening to be too large to ensure the assembly fit.

It is known that in the prior art, a carburetor is rigidly connected to a cylinder head of an engine assembly, and an air outlet of an air filter is rigidly connected to an air inlet of the carburetor by a flange, i.e., the air filter is a part of the engine assembly. However, due to the introduction of the inner support frame, the accumulated tolerance between the engine assembly and the side plate is increased, which causes a large deviation between the air filter and the opening on the side plate matched with the air filter, and it is not guaranteed that the air filter and the opening on the side plate can be installed in a matching manner.

) The introduction of the inner support frame brings about the problem that when the generator set works, the whole vibration is large, although the vibration can be weakened by introducing a vibration absorption structure between the inner support frame and the engine assembly. However, as mentioned in 1) above, the introduction of the suspension structure causes further accumulation of tolerances between the components, which is less favorable for assembly.

) The generating set shakes too greatly, leads to the oil bleeding in the oil tank venthole at top, still can cause destruction to the electrical components in the front shroud shell simultaneously, like the dc-to-ac converter etc. hinders its normal effectual work to and to the connection stability between carburetor and the empty filter cause more adverse effect.

Obviously, a portable inverter gasoline generator set which is easier to assemble, better in anti-seismic performance when used and more stable and reliable in work is urgently needed in the industry at present.

Disclosure of Invention

The utility model discloses the purpose is: the portable inversion gasoline generator set has the advantages that accumulated tolerance among components is smaller, the assembly is easier to realize integrally, the anti-seismic performance is better when the portable inversion gasoline generator set is used, and the work is more stable and reliable.

The technical scheme of the utility model is that: a portable inversion gasoline generator set comprises a shell and an engine assembly arranged in the shell, wherein the engine assembly comprises an engine, a generator, a carburetor arranged on an engine cylinder head and an air filter connected with the carburetor; the engine assembly is characterized in that the shell comprises a rectangular enclosure frame which is enclosed by a front enclosure shell, a rear enclosure shell, a left side plate and a right side plate and is fixed by adopting a connecting piece, and an oil tank which is fixed at the top of the rectangular enclosure frame, wherein a plurality of upper supporting tubes and a plurality of lower supporting tubes are fixed between the left side plate and the right side plate; an air filter is fixedly or integrally arranged on one of the left side plate and the right side plate close to the carburetor, and an air outlet of the air filter is connected with an air inlet of the carburetor through an elastic hose.

Further, in the utility model discloses in the oil tank bottom is equipped with extends the circle, extends the circle and is equipped with a plurality of longitudinal distribution's connection lug all around, and the rectangle encloses and corresponds on frame and the connection lug and be equipped with the connecting hole for wear to establish the connecting piece and enclose the frame fixedly with connecting lug and rectangle.

Further, in the utility model discloses in it all is equipped with a plurality ofly to extend to circle corresponding left side board and right side board connect the lug, all be equipped with the connecting hole that corresponds between left side board and right side board and the corresponding connection lug for wear to establish the connecting piece and fix with left side board and right side board with corresponding connection lug.

Furthermore, in the utility model discloses in the rectangle encloses the frame bottom and is fixed with a plurality of shock attenuation feet.

Furthermore, in the utility model discloses in the elastic hose is rubber tube, plastic tubing or silicone tube, has resistant inflection concurrently and antidetonation characteristic.

Further, in the utility model discloses in the place that is used for being connected with the pipe connector on the engine assembly on last stay tube and the lower stay tube all overlaps in advance and is equipped with the yielding rubber bush, and the pipe connector mainly adopts clamp or pipe strap etc. of present conventional metal or plastics system. Or in another embodiment, the pipe connector itself may be a shock absorbing rubber pipe connector made of shock absorbing rubber, which may eliminate the use of a shock absorbing rubber bushing.

Further, the utility model discloses the left side board or the right side board surface at cavity filter place are opened has the opening of the empty filter of being convenient for maintenance relative with empty filter, still including fixing the empty filter apron on the opening.

Furthermore, in the utility model discloses in the last integrated into one piece shaping of left and right curb plate has the last location jack seat that is used for pegging graft the last stay tube and is used for pegging graft the lower location jack seat of stay tube down.

Furthermore, in the rectangular enclosure frame of the utility model, the left side plate and the right side plate are positioned between the front housing and the rear housing, and the parts of the front housing near the two sides are respectively provided with a left side plate front connecting part and a right side plate front connecting part, a sawtooth-shaped key groove splicing structure is arranged between the front edge of the left side plate and the left side plate front connecting part in a matching way, and a connecting hole is correspondingly arranged between the left side plate front connecting part and the front edge of the left side plate for cross-connecting a screw to fix the left side plate and the front housing; a sawtooth-shaped key groove inserting structure is arranged between the front edge of the right side plate and the front connecting part of the right side plate in a matching manner, and a connecting hole for penetrating and connecting a screw is correspondingly arranged between the front connecting part of the right side plate and the front edge of the right side plate so as to fix the right side plate and the front housing;

meanwhile, the parts of the rear housing close to the two sides are respectively provided with a left side plate rear connecting part and a right side plate rear connecting part, a sawtooth-shaped key groove inserting structure is arranged between the rear edge of the left side plate and the left side plate rear connecting part in a matching manner, and a connecting hole is correspondingly arranged between the left side plate rear connecting part and the rear edge of the left side plate for penetrating a screw to fix the left side plate and the rear housing; and a sawtooth-shaped key groove inserting structure is arranged between the rear edge of the right side plate and the rear connecting part of the right side plate in a matching manner, and a connecting hole for penetrating a screw is correspondingly arranged between the rear connecting part of the right side plate and the rear edge of the right side plate so as to fix the right side plate and the rear housing.

The utility model discloses in with preceding housing as the conventional control panel that is used for settling electrical components, but we have made further improvement to it as follows: the inverter assembly and the power switch assembly in the electrical appliance assembly are respectively and independently arranged in the output electrical appliance box and the power switch electrical appliance box, and the front housing is respectively provided with a slot corresponding to the two electrical appliance boxes. The output electrical box and the power switch electrical box are both fixed to the surface of the front housing by screws and are embedded into corresponding openings. Meanwhile, an inverter assembly in the output electrical box is electrically connected with a generator in the engine assembly through an electric connector; and the power switch assembly (containing the igniter controller) in the power switch electrical box is also electrically connected with the igniter of the engine in the engine assembly through the electrical connector.

The utility model has the advantages that:

1. the utility model provides a portable contravariant petrol generating set, through canceling original interior support frame, directly adopt the rectangle frame that encloses to close fixedly by front housing, back housing, left side board, right side board to enclose and install upper and lower stay tube as the main frame, and then assemble the engine assembly, make the tolerance of accumulation between the part diminish, the alignment assembly is more easily changed between the part, has improved generating set's packaging efficiency greatly; meanwhile, the elimination of the inner supporting frame is also beneficial to reducing the vibration of the generator set during working, and the working stability is improved.

The utility model provides a this kind of portable contravariant gasoline generating set, it peels off out the empty filter from the engine assembly, on direct fixation or an organic whole design is close to one of carburetor in left and right curb plate to adopt the elastic hose to be connected between the venthole of empty filter and the inlet port of carburetor. This eliminates the assembly contradiction between the original air filter and the side plate, and transfers the contradiction to the assembly between the air filter and the carburetor, and the assembly coincidence problem caused by the accumulated tolerance which is also possible when the air filter and the carburetor are assembled is solved by introducing the elastic hose. The elastic hose is introduced, so that the air filter and the carburetor can be reliably connected regardless of accumulated tolerance between components, and the elastic hose has strong shock resistance, so that the connection stability between the air filter and the carburetor can be effectively improved.

The utility model provides a portable contravariant petrol generating set is favorable to enclosing the frame and introducing the yielding rubber bush between upper and lower stay tube to the rectangle after supporting the frame in the cancellation, improvement generating set's that can be better whole anti-seismic performance under the prerequisite that is unlikely to too enlarge part accumulative tolerance.

The utility model provides a portable contravariant petrol generating set, owing to support the frame back in the cancellation, it is more convenient to dismantle and assemble, and because of spare part reduces, also greatly reduced generating set's manufacturing cost.

The utility model discloses an among the preferred scheme, settle inverter assembly and the power switch subassembly in the electrical components in two convenient to detach's electrical apparatus box respectively (export electrical apparatus box and power switch electrical apparatus box promptly), in case inverter assembly or power switch subassembly damage need maintain or change, so we need not to unpack apart whole shell, only need pull down corresponding electrical apparatus box and break off corresponding electrical connector and just can implement the maintenance or change, operate very conveniently. And the design of output electrical apparatus box and power switch electrical apparatus box does benefit to the modularization production, possesses the commonality for non-professional also can easily maintain and change gasoline generating set.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic view of an assembly structure of the top oil tank and the bottom shock absorbing foot pad of FIG. 1;

FIG. 3 is a schematic illustration of an assembled configuration of the rectangular enclosure and internal engine assembly of FIG. 1;

FIG. 4 is a rear view of the embodiment of FIG. 1 (carburetor and air cleaner partially cut away);

FIG. 5 is a schematic view of an assembly structure of an output electrical box and a power switch electrical box on the front cover case in FIG. 1;

FIG. 6 is an electrical connection diagram of the middle output electrical box and the engine assembly according to the present invention;

fig. 7 is an electrical connection relationship diagram of the power switch electrical box and the engine assembly of the present invention.

Wherein: 1. an engine assembly; 2. an engine cylinder head; 3. a carburetor; 4. an air filter; 5. a front cover shell; 5a, a left side plate front connecting part; 5b, a right side plate front connecting part; 6. a rear housing; 6a, a left side plate rear connecting part; 6b, a right side plate rear connecting part; 7. a left side plate; 8. a right side plate; 9. an oil tank; 10. an upper support tube; 11. a lower support tube; 12. a pipe connector; 13. an elastic hose; 14. an extension ring; 14a, a connecting lug; 15. a shock absorption foot; 16. fixing screws of the rectangular surrounding frame; 17. an opening; 18. an air filter cover plate; 19. an upper positioning jack seat; 20. a lower positioning jack seat; 21. a sawtooth-shaped key groove inserting structure; 22. an output electrical box; 23. a fuel tank fixing screw; 24. fixing screws for the cover plate of the air filter; 25. a power switch electrical box; 26. mounting screws of the output electrical box; 27. mounting screws for the power switch electrical box; 28. an upper groove is formed; 29. lower grooving; 30. an input power electrical connector; 31. the carburetor stepper motor electrical connector; 32. an engine igniter electrical connector.

Detailed Description

Example (b): referring to fig. 1 to 3, a specific embodiment of the portable inverter gasoline generator set of the present invention is shown. Like the known device, it has a housing and an engine assembly 1 arranged in the housing, the engine assembly 1 being composed of an engine, a generator, a carburetor 3 and an air filter 4. The generator is arranged in the shell of the engine, is positioned at the tail end of the engine and is connected with the output shaft of the engine. The engine has an engine head 2 on which a carburettor 3 is arranged, which carburettor 3 needs to be connected to an air filter 4.

The utility model discloses do the core to the shell and improve, it has cancelled existing interior support frame, will constitute to retrench to: the engine assembly is characterized in that the engine assembly is directly surrounded by a front housing 5, a rear housing 6, a left side plate 7 and a right side plate 8 and fixed by a rectangular surrounding frame formed by rectangular surrounding frame fixing screws 25, an oil tank 9 fixed at the top of the rectangular surrounding frame, and an upper supporting tube 10 and two lower supporting tubes 11 fixed between the left side plate 7 and the right side plate 8 and used for fixing the engine assembly 1, and the engine assembly is shown by combining fig. 1 and fig. 3.

As shown in fig. 2, in this embodiment, an extension ring 14 is integrally disposed around the bottom of the oil tank 9, two connection lugs 14a are respectively disposed on the extension ring 14 corresponding to the left side plate 7 and the right side plate 8, and corresponding connection holes are respectively disposed between the left side plate 7 and the right side plate 8 and the corresponding connection lugs 14a for inserting an oil tank fixing screw 23 to fix the left side plate 7 and the right side plate 8 with the corresponding connection lugs 14a, so as to fix the oil tank 9 to the upper portion of the rectangular enclosure frame.

Still as shown in fig. 2, in this embodiment, four shock absorbing feet 15 are fixed at the bottom of the rectangular enclosure frame to improve the shock resistance of the generator set.

Referring to fig. 3 again, when the rectangular enclosure frame is enclosed, the left side plate 7 and the right side plate 8 are located between the front housing 5 and the rear housing 6, and the portions of the front housing 5 near both sides are respectively provided with a left side plate front connecting portion 5a and a right side plate front connecting portion 5b, a serrated key groove inserting structure 21 is provided between the front edge of the left side plate 7 and the left side plate front connecting portion 5a in a matching manner, specifically, a serrated inserting key is formed on the front edge of the left side plate 7, and a serrated inserting groove matched with the serrated inserting key is formed on the left side plate front connecting portion 5a (inner side). Meanwhile, a connecting hole is correspondingly formed between the front connecting part 5a of the left side plate and the front edge of the left side plate 7 and is used for connecting a rectangular surrounding frame fixing screw 16 in a penetrating manner so as to fix the left side plate 7 and the front housing 5; the front edge of the right side plate 8 and the front connecting part 5b of the right side plate are also provided with the sawtooth-shaped key slot inserting structure 21 in a matching way, and a connecting hole for connecting a rectangular surrounding frame fixing screw 16 in a penetrating way is correspondingly arranged between the front connecting part 5b of the right side plate and the front edge of the right side plate 8 so as to fix the right side plate 8 and the front housing 5;

meanwhile, the parts of the rear housing 6 close to the two sides are respectively provided with a left side plate rear connecting part 6a and a right side plate rear connecting part 6b, a sawtooth-shaped key groove inserting structure 21 is arranged between the rear edge of the left side plate 7 and the left side plate rear connecting part 6a in a matching manner, specifically, a sawtooth-shaped inserting key is formed on the rear edge of the left side plate 7, and a sawtooth-shaped inserting groove matched with the sawtooth-shaped inserting key is formed on the left side plate rear connecting part 6 a. Meanwhile, a connecting hole is correspondingly formed between the rear connecting part 6a of the left side plate and the rear edge of the left side plate 7 and is used for being connected with a rectangular surrounding frame fixing screw 16 in a penetrating mode so as to fix the left side plate 7 and the rear housing 6; the rear edge of the right side plate 8 and the rear connecting portion 6b of the right side plate are also provided with the sawtooth-shaped key groove inserting structure 21 in a matching manner, and a connecting hole for penetrating and connecting a rectangular surrounding frame fixing screw 16 is correspondingly formed between the rear connecting portion 6b of the right side plate and the rear edge of the right side plate 8 so as to fix the right side plate 8 and the rear housing 6.

Meanwhile, an upper positioning jack seat 19 for inserting the upper support pipe 10 and a lower positioning jack seat 20 for inserting the lower support pipe 11 are integrally formed on the left side plate 7 and the right side plate 8, as shown in fig. 3.

As further shown in fig. 3, pipe joint members 12 are fixed to both the upper and lower portions of the engine assembly 1, wherein one pipe joint member 12 is engaged with the upper support pipe 10, and two pipe joint members 12 are engaged with each lower support pipe 11.

The pipe connector 12 in this embodiment is a damping rubber pipe clamp, which is composed of a collar portion and a T-shaped block portion integrally connected. The lantern ring part is directly sleeved on the corresponding upper supporting pipe 10 and the lower supporting pipe 11, and the T-shaped clamping block part is matched and fixed with a T-shaped clamping groove arranged on the outer shell wall of the engine assembly 1.

Referring to fig. 3 and 4, in the housing of the present embodiment, the left side plate 7 is close to the carburetor 3 of the engine assembly 1, the air cleaner 4 is integrally provided on the inner side surface of the left side plate 7, and the outlet port of the air cleaner 4 is connected to the inlet port of the carburetor 3 by the elastic hose 13. The elastic hose 13 is a rubber tube. Referring to fig. 3, the surface of the left side plate 7 where the air filter 4 is located is provided with an opening 17 opposite to the air filter 4 for facilitating maintenance of the air filter 4, and in a normal use condition of the generator set, the opening 17 is fixed with an air filter cover plate 18 through an air filter cover plate fixing screw 24 to close the opening 17.

In addition, as shown in fig. 1, fig. 2, fig. 5, fig. 6 and fig. 7, the front housing 5 in the present embodiment is a control panel for mounting electrical components, and we make improvements to this part as follows:

the inverter assembly and the power switch assembly in the electrical assembly are respectively and independently arranged in the output electrical box 22 and the power switch electrical box 25, and the front cover 5 is provided with an upper open slot 28 and a lower open slot 29 which are distributed up and down and are respectively used for embedding and arranging the output electrical box 22 and the power switch electrical box 25. As shown in particular in connection with fig. 5, the output electrical box 22 is fixed to the front casing 5 by four output electrical box mounting screws 26 and is embedded in an upper slot 28; the power switch box 25 is secured to the front housing 5 by two power switch box mounting screws 27 and fits into a lower slot 29.

Referring to fig. 6, an inverter assembly is disposed in the output electrical box 22, and is connected to two flat cables, one of which is electrically connected to the power output end of the generator in the engine assembly 1 through the input power electrical connector 30 (the inverter assembly side is a female plug, and the power side of the generator is a male plug), and is used for outputting the electrical energy of the generator to the inverter assembly, and then outputting the electrical energy to the external electrical equipment; the other path is electrically connected with a carburetor stepper motor (located on the generator side) of the engine in the engine assembly 1 through a carburetor stepper motor electrical connector 31 (the inverter assembly side is a female plug, and the carburetor stepper motor side is a male plug) for supplying power to the carburetor stepper motor.

As shown in fig. 7, a flat cable is connected to an igniter controller of a power switch assembly in the power switch electrical box 25, and is electrically connected to an igniter of an engine in the engine assembly 1 through an engine igniter electrical connector 32 (a female plug is arranged on the side of the power switch assembly, and a male plug is arranged on the side of the igniter), and the flat cable specifically includes a high voltage pack, a contactor, and an oil sensor connection wire, but all of them are in the prior art.

The above-mentioned embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A portable inversion gasoline generating set comprises a shell and an engine assembly (1) arranged in the shell, wherein the engine assembly (1) comprises an engine, a generator, a carburetor (3) arranged on an engine cylinder head (2) and an air filter (4) connected with the carburetor (3); the engine assembly is characterized in that the shell comprises a rectangular surrounding frame which is surrounded and closed by a front cover shell (5), a rear cover shell (6), a left side plate (7) and a right side plate (8) and fixed by adopting a connecting piece, and an oil tank (9) fixed at the top of the rectangular surrounding frame, wherein a plurality of upper supporting tubes (10) and a plurality of lower supporting tubes (11) are fixed between the left side plate (7) and the right side plate (8), and tube connectors (12) are fixed on the upper part and the lower part of the engine assembly (1) and are respectively fixed with the upper supporting tubes (10) and the lower supporting tubes (11) through the tube connectors (12); an air filter (4) is fixed on one of the left side plate (7) and the right side plate (8) close to the carburetor (3) or is integrally arranged, and an air outlet of the air filter (4) is connected with an air inlet of the carburetor (3) by an elastic hose (13).

2. The portable inversion gasoline generating set of claim 1, wherein the bottom of the oil tank (9) is provided with an extension ring (14), the extension ring (14) is provided with a plurality of longitudinally distributed connecting lugs (14 a) around, and the rectangular surrounding frame and the connecting lugs (14 a) are correspondingly provided with connecting holes for being penetrated with connecting pieces to fix the connecting lugs (14 a) and the rectangular surrounding frame.

3. The portable inverter gasoline generating set according to claim 2, wherein the extension ring (14) is provided with a plurality of connecting lugs (14 a) corresponding to the left side plate (7) and the right side plate (8), and corresponding connecting holes are formed between the left side plate (7) and the right side plate (8) and the corresponding connecting lugs (14 a) for inserting connecting pieces to fix the left side plate (7) and the right side plate (8) with the corresponding connecting lugs (14 a).

4. The portable inverter gasoline generating set of claim 1, wherein the rectangular enclosure frame is fixed with a plurality of shock absorbing feet (15) at the bottom.

5. The portable inverter gasoline generating set of claim 1, wherein the flexible hose (13) is a rubber tube, a plastic tube or a silicone tube.

6. The portable inverter gasoline generating set according to claim 1, wherein the upper supporting tube (10) and the lower supporting tube (11) are pre-sleeved with damping rubber bushings at the positions for connecting with the tube connecting pieces (12) on the engine assembly (1), or the tube connecting pieces (12) are damping rubber tube connecting pieces made of damping rubber.

7. The portable inverter gasoline generating set according to claim 1, wherein the surface of the left side plate (7) or the right side plate (8) where the air filter (4) is located is provided with an opening (17) opposite to the air filter (4) for facilitating maintenance of the air filter (4), and further comprising an air filter cover plate (18) fixed on the opening (17).

8. The portable inverter gasoline generating set according to claim 1, wherein the left side plate (7) and the right side plate (8) are integrally formed with an upper positioning socket (19) for inserting the upper support tube (10) and a lower positioning socket (20) for inserting the lower support tube (11).

9. The portable inversion gasoline generating set of claim 1, wherein a left side plate (7) and a right side plate (8) in the rectangular enclosure frame are positioned between the front housing (5) and the rear housing (6), a left side plate front connecting part (5 a) and a right side plate front connecting part (5 b) are respectively arranged on the front housing (5) near two sides, a sawtooth-shaped key slot inserting structure (21) is arranged between the front edge of the left side plate (7) and the left side plate front connecting part (5 a) in a matching manner, and a connecting hole for inserting a screw is correspondingly arranged between the left side plate front connecting part (5 a) and the front edge of the left side plate (7) to fix the left side plate (7) and the front housing (5); a sawtooth-shaped key groove inserting structure (21) is also arranged between the front edge of the right side plate (8) and the front connecting part (5 b) of the right side plate in a matching manner, and a connecting hole for passing a screw to fix the right side plate (8) and the front housing (5) is correspondingly arranged between the front connecting part (5 b) of the right side plate and the front edge of the right side plate (8);

meanwhile, a left side plate rear connecting part (6 a) and a right side plate rear connecting part (6 b) are respectively arranged on the rear housing (6) close to the two sides, a sawtooth-shaped key groove inserting structure (21) is arranged between the rear edge of the left side plate (7) and the left side plate rear connecting part (6 a) in a matching manner, and a connecting hole for penetrating a screw is correspondingly arranged between the left side plate rear connecting part (6 a) and the rear edge of the left side plate (7) to fix the left side plate (7) and the rear housing (6); and a sawtooth-shaped key groove inserting structure (21) is arranged between the rear edge of the right side plate (8) and the right side plate rear connecting part (6 b) in a matching manner, and a connecting hole for penetrating a screw to fix the right side plate (8) and the rear housing (6) is correspondingly arranged between the right side plate rear connecting part (6 b) and the rear edge of the right side plate (8).

10. The portable inverter gasoline generating set according to claim 1, wherein the output electrical box (22) and the power switch electrical box (25) are respectively fixed on the surface of the front cover (5) through screws, and the surface of the front cover (5) is provided with a slot for the output electrical box (22) and the power switch electrical box (25) to be embedded in; an inverter assembly is arranged in the output electrical box (22), and the inverter assembly is electrically connected with a generator in the engine assembly (1) through an electric connector; and a power switch assembly is arranged in the power switch electrical box (25), and the power switch assembly is electrically connected with an igniter of an engine in the engine assembly (1) through an electric connector.