Chassis structure and generator set

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a chassis structure and a generator set, the chassis structure comprises a longitudinal beam, a cross beam assembly and a support cushion block; the two longitudinal beams are oppositely arranged; the two ends of the cross beam assembly are connected with the two longitudinal beams correspondingly. One end of the supporting cushion block is rotatably connected with the outer side face of the longitudinal beam, and the other end of the supporting cushion block is provided with a containing position contained in the outer side face of the longitudinal beam and a supporting position supported at the bottom of the longitudinal beam to heighten the chassis structure. The outer side face of each longitudinal beam is provided with at least one set of supporting cushion blocks. According to the chassis structure, only the position of the supporting cushion block needs to be adjusted when the chassis structure moves each time through the supporting cushion block which can be rotationally connected, operation is convenient, and no risk exists on personal safety even if operation is conducted in a narrow space.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a chassis structure and a generator set. Background Art

[0002] Generally, in order to prevent the chassis of the generator set from being soaked by water and to keep the bottom of the chassis of the generator set ventilated, so as to reduce the risk of rust on the chassis and chassis fuel tank of the generator set, when the generator set is stored outdoors or in a warehouse for a long time, usually after the generator set is moved to the designated location, special wooden strips or other strip materials are used as pads under the two longitudinal beams of the chassis of the generator set to leave enough gap between the bottom of the chassis of the generator set and the ground.

[0003] However, the pads need to be prepared in advance, and the pads need to be re-placed each time the generator set is moved, which is inconvenient to operate. Manually placing the pads in a small space also poses a risk to personal safety. Utility Model Content

[0004] In view of this, the utility model provides a chassis structure and a generator set to solve the problem that the pads of the generator set need to be prepared in advance, the operation is inconvenient each time it is moved, and there is a risk to personal safety.

[0005] In the first aspect, the utility model provides a chassis structure, including a longitudinal beam, a cross beam assembly and a support pad; the longitudinal beam has two oppositely arranged longitudinal beams; the two ends of the cross beam assembly are respectively connected to the two longitudinal beams; one end of the support pad is rotatably connected to the outer side surface of the longitudinal beam, and the other end has a storage position stored on the outer side surface of the longitudinal beam, and a supporting position supported at the bottom of the longitudinal beam to raise the chassis structure; at least one group of the support pads is provided on the outer side surface of each longitudinal beam.

[0006] Beneficial effects: The connection between the longitudinal beam and the cross beam forms the main body of the entire chassis structure, so that the chassis structure is convenient for supporting or carrying devices such as generator sets. When the support pad is in the supporting position, the entire chassis structure can be raised, so that the bottom surface of the chassis structure is spaced from the supporting surface such as the ground and platform that supports it, the ventilation of the bottom surface of the chassis structure is maintained, and the chassis structure is prevented from being soaked by water, thereby reducing the risk of rust on the chassis and the chassis tank. When the support pad is in the storage position, the compactness of the chassis structure can be maintained. The support pad has a storage position and a supporting position. The chassis structure and the chassis tank and the generator set and other devices carried by it only need to adjust the position of the support pad each time they move, which is convenient to operate. There is no risk to personal safety even if the operation is carried out in a small space. In addition, the support pad is connected to the outer side of the longitudinal beam, does not occupy the internal space of the chassis structure, and is also convenient for the operator to adjust the support pad between the support position and the storage position.

[0007] In an optional embodiment, the support pad includes:

[0008] Rib;

[0009] A rotating shaft, fixedly connected to one end of the rib plate, the rib plate being rotatably connected to the outer side surface of the longitudinal beam through the rotating shaft;

[0010] A support plate is fixedly connected to the other end of the rib plate, and the support plate has the storage position and the support position; a support plane is provided on the side of the support plate facing away from the rib plate, and when the support plate is in the support position, the support plane is located below the longitudinal beam and forms a support gap with the bottom surface of the longitudinal beam.

[0011] Beneficial effects: The arrangement of the rib plate, the rotating shaft and the support plate simplifies the support pad, and obtains a larger support plane through the support plate, thereby increasing the support area of ​​the support pad and ensuring the support stability of the support plate when it is in the support position. The rib plate is rotatably connected to the outer side surface of the longitudinal beam through the rotating shaft, and the support plate is connected to a position away from the outer side surface of the longitudinal beam through the rib plate. When the support plate is in the support position, the support plane can extend to below the bottom surface of the chassis structure under the action of the rib plate, and form a support gap with the bottom surface of the longitudinal beam to raise both the longitudinal beam and the cross beam assembly.

[0012] In an optional embodiment, it also includes a mounting bracket fixedly connected to the outer side surface of the longitudinal beam, and the mounting bracket is provided with a matching hole; each group of the support pads matches two relatively arranged mounting brackets; both ends of the rotating shaft are provided with protruding ends protruding from the rib plate, and the two protruding ends are respectively rotatably inserted into the two matching holes.

[0013] In an optional embodiment, it further includes a fixing portion connected to the outer side surface of the longitudinal beam and located above the mounting bracket, and when the support plate is in the storage position, the fixing portion is used to fix the rib plate.

[0014] In an optional embodiment, the fixing part is a magnetic column, which is provided with a countersunk hole and is detachably connected to the outer surface of the longitudinal beam through the countersunk hole and a fastener; when the support plate is in the storage position, the magnetic column is used to adsorb the rib plate.

[0015] In an optional embodiment, an avoidance groove is provided on the bottom plate of the longitudinal beam, and when the support plate is in the support position, the rib plate is located in the avoidance groove.

[0016] In an optional embodiment, the crossbeam assembly includes a first crossbeam and a second crossbeam, the first crossbeam is connected to the top of the longitudinal beam, and a fork hole is provided on the first crossbeam along the length direction of the first crossbeam; the second crossbeam is connected to the bottom of the longitudinal beam, and a accommodating space is formed between the first crossbeam and the second crossbeam.

[0017] Beneficial effect: Compared with the related art in which a dedicated fork beam is provided at the bottom of the chassis structure, combining the fork hole with the first beam not only saves the manufacturing cost of the chassis structure, but also increases the height dimension of the accommodating space formed between the first beam and the second beam, thereby increasing the volume of structures such as the chassis oil tank accommodated in the accommodating space.

[0018] In an optional embodiment, both ends of the fork hole are provided with flared portions, and the area of ​​the flow cross-section of the flared portion gradually decreases toward the direction where the other flared portion is located.

[0019] In an optional embodiment, two side walls of the flared portion in the horizontal direction are inclined outward in a trumpet shape, and the width of the flared portion gradually decreases toward the direction where the other flared portion is located.

[0020] In an optional embodiment, the top wall and / or the bottom wall of the flared portion in the height direction is slanted outward in a trumpet shape, and the height of the flared portion gradually decreases toward the direction where the other flared portion is located.

[0021] In a second aspect, the utility model further provides a generator set, comprising the above-mentioned chassis structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a partial schematic diagram of a generator set (supporting pads are in the storage position) according to an embodiment of the utility model;

[0024] Figure 2 It is a partial schematic diagram of a generator set (supporting pad is in a supporting position) in one perspective of an embodiment of the utility model;

[0025] Figure 3 It is a partial schematic diagram of another viewing angle of a generator set (the supporting pad is in the supporting position) of an embodiment of the utility model;

[0026] Figure 4 A schematic diagram of a chassis structure of an embodiment of the utility model from one viewing angle;

[0027] Figure 5 A schematic diagram of a chassis structure (partial cross-section) of an embodiment of the utility model from another viewing angle;

[0028] Figure 6 A schematic diagram of a chassis oil tank of a generator set according to an embodiment of the utility model;

[0029] Figure 7 It is a partial enlarged schematic diagram of a chassis structure of an embodiment of the utility model;

[0030] Figure 8 A schematic diagram of a support pad according to an embodiment of the utility model;

[0031] Fig. 9 It is a cross-sectional view of a fixing portion of an embodiment of the utility model.

[0032] Description of reference numerals:

[0033] 1. Longitudinal beam; 11. Avoidance groove; 2. Crossbeam assembly; 21. First crossbeam; 211. Fork hole; 212. Expanding portion; 22. Second crossbeam; 3. Support pad; 31. Rib plate; 32. Rotating shaft; 33. Support plate; 331. Support plane; 4. Mounting support; 41. Matching hole; 5. Fixing portion; 51. Countersunk hole; 6. Chassis oil tank. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0035] Combine the following Figures 1 to 9 , describing an embodiment of the utility model.

[0036] According to an embodiment of the utility model, on the one hand, a chassis structure is provided, including a longitudinal beam 1, a cross beam assembly 2 and a support pad 3; the longitudinal beam 1 has two oppositely arranged ones; the two ends of the cross beam assembly 2 are respectively connected to the two longitudinal beams 1; one end of the support pad 3 is rotatably connected to the outer side surface of the longitudinal beam 1, and the other end has a storage position for being stored on the outer side surface of the longitudinal beam 1, and a supporting position supported on the bottom of the longitudinal beam 1 to raise the chassis structure; at least one group of support pads 3 is provided on the outer side surface of each longitudinal beam 1.

[0037] The connection between the longitudinal beam 1 and the cross beam forms the main body of the entire chassis structure, so that the chassis structure is convenient for supporting or carrying devices such as generator sets. When the support pad 3 is in the supporting position, the entire chassis structure can be raised so that the bottom surface of the chassis structure is spaced from the supporting surface such as the ground, platform, etc. that supports it, the ventilation of the bottom surface of the chassis structure is maintained, and the chassis structure is prevented from being soaked by water, thereby reducing the risk of rusting of the chassis and the chassis oil tank 6. When the support pad 3 is in the storage position, the compactness of the chassis structure can be maintained. In addition, the support pad 3 has a storage position and a supporting position. The chassis structure and the chassis oil tank 6 and the generator set and other devices carried by it only need to adjust the position of the support pad 3 each time they move, which is convenient to operate. Even if the operation is carried out in a small space, there is no risk to personal safety. In addition, the support pad 3 is connected to the outer side of the longitudinal beam 1, does not occupy the internal space of the chassis structure, and is also convenient for the operator to adjust the support pad 3 between the supporting position and the storage position.

[0038] Specifically, the outer side of the longitudinal beam 1 referred to in this embodiment refers to the side of one longitudinal beam 1 facing away from another longitudinal beam 1. Two or more groups of support pads 3 are provided on the outer side of each longitudinal beam 1, and the number and position of the support pads 3 on the two longitudinal beams 1 correspond to each other, and the multiple groups of support pads 3 are spaced apart along the length direction of the longitudinal beam 1. In a preferred embodiment, two groups of support pads 3 are provided on the outer side of each longitudinal beam 1, and the two support pads 3 are spaced apart along the length direction of the longitudinal beam 1. The support and elevation height of each support pad 3 to the chassis structure are consistent.

[0039] In one embodiment, the support pad 3 includes a rib plate 31, a rotating shaft 32 and a support plate 33; the rotating shaft 32 is fixedly connected to one end of the rib plate 31, and the rib plate 31 is rotatably connected to the outer side surface of the longitudinal beam 1 through the rotating shaft 32; the support plate 33 is fixedly connected to the other end of the rib plate 31, and the support plate 33 has a storage position and a supporting position; a support plane 331 is provided on the side of the support plate 33 facing away from the rib plate 31, and when the support plate 33 is in the supporting position, the support plane 331 is located below the longitudinal beam 1 and forms a supporting gap with the bottom surface of the longitudinal beam 1.

[0040] The arrangement of the rib plate 31, the rotating shaft 32 and the support plate 33 simplifies the support pad 3, and obtains a larger support plane 331 through the support plate 33, thereby increasing the support area of ​​the support pad 3 and ensuring the support stability of the support plate 33 when it is in the support position. The rib plate 31 is rotatably connected to the outer side surface of the longitudinal beam 1 through the rotating shaft 32, and the support plate 33 is connected to a position away from the outer side surface of the longitudinal beam 1 through the rib plate 31. When the support plate 33 is in the support position, the support plane 331 can extend to the bottom surface of the chassis structure under the action of the rib plate 31, and form a support gap with the bottom surface of the longitudinal beam 1, so as to raise both the longitudinal beam 1 and the cross beam assembly 2.

[0041] Specifically, when the support plate 33 is in the supporting position, the height of the support interval between the support plane 331 of each support pad 3 and the bottom surface of the longitudinal beam 1 is consistent. The height D of the support interval can meet 50mm≤D≤200mm, preferably in the range of 100mm≤D≤150mm, and preferably the height D is 120mm.

[0042] In a further embodiment, the support plane 331 is arranged perpendicularly to the rib plate 31, so that when the support plate 33 is in the supporting position, the rib plate 31 is naturally arranged in the vertical direction to avoid unstable support caused by uneven force. The support plane 331 is arranged perpendicularly to the rib plate 31, and the support plate 33 can rotate to the supporting position by its own gravity.

[0043] In one embodiment, it also includes a mounting bracket 4, which is fixedly connected to the outer side surface of the longitudinal beam 1, and a matching hole 41 is provided on the mounting bracket 4; each group of support pads 3 matches two relatively arranged mounting brackets 4; both ends of the rotating shaft 32 are provided with protruding ends protruding from the rib plate 31, and the two protruding ends are respectively rotatably inserted into the two matching holes 41.

[0044] The mounting bracket 4 can rotatably connect the rotating shaft 32 to the outer side of the longitudinal beam 1, and form a gap between the rotating shaft 32 and the outer side of the longitudinal beam 1 to avoid friction between the support pad 3 and the outer side of the longitudinal beam 1 when the support pad 3 rotates. The two oppositely arranged mounting brackets 4 can not only limit the rotating shaft 32 from both ends of the axial direction of the rotating shaft 32, but also easily realize the rotational cooperation between the protruding end and the matching hole 41.

[0045] Specifically, the mounting bracket 4 can be welded to the outer side surface of the longitudinal beam 1, or can be detachably connected to the outer side surface of the longitudinal beam 1 by a fastening structure such as screws.

[0046] In one embodiment, a fixing portion 5 is further included, which is connected to the outer side of the longitudinal beam 1 and is located above the mounting bracket 4. When the support plate 33 is in the storage position, the fixing portion 5 is used to fix the rib plate 31.

[0047] The fixing portion 5 can fix the support pad 3 in the storage position, which not only maintains the compactness of the chassis structure, but also prevents the movable support pad 3 from causing friction, collision or damage during the movement of the chassis structure.

[0048] In one embodiment, the fixing portion 5 is a magnetic column, which is provided with a countersunk hole 51 and is detachably connected to the outer surface of the longitudinal beam 1 through the countersunk hole 51 and a fastener; when the support plate 33 is in the storage position, the magnetic column is used to adsorb the rib plate 31.

[0049] The end face of the magnetic column away from the outer side of the longitudinal beam 1 can absorb the rib plate 31 and fix the support plate 33 in the storage position. The arrangement of the countersunk hole 51 on the magnetic column can facilitate the detachable connection to the outer side of the longitudinal beam 1 through a fastener, and can prevent the fastener from protruding from the end face of the magnetic column away from the outer side.

[0050] Specifically, the side of the support plate 33 facing the outer side of the longitudinal beam 1 is the abutment side. When the support plate 33 is in the storage position, the distance that the abutment side protrudes from the rib plate 31 is less than or equal to the distance that the magnetic column protrudes from the outer side of the longitudinal beam 1. Preferably, the distance that the abutment side protrudes from the rib plate 31 is equal to the distance that the magnetic column protrudes from the outer side of the longitudinal beam 1. When the support plate 33 is in the storage position, the abutment side abuts against the outer side of the longitudinal beam 1, further increasing the storage stability of the support pad 3.

[0051] As a convertible embodiment, the fixing portion 5 may be a buckle provided on the outer side surface of the longitudinal beam 1 for clamping the rib plate 31 to fix the support plate 33 in the storage position.

[0052] Furthermore, the chassis structure also includes a positioning portion, which is connected to the outer side of the longitudinal beam 1 and is located below the mounting bracket 4. When the support plate 33 is in the supporting position, the positioning portion is used to position and fix the rib plate 31. Preferably, the positioning portion is a magnetic column for adsorbing the rib plate 31.

[0053] In one embodiment, an avoidance groove 11 is provided on the bottom plate of the longitudinal beam 1 , and when the support plate 33 is in the supporting position, the rib plate 31 is located at the avoidance groove 11 .

[0054] When the support plate 33 moves between the storage position and the support position, the avoidance groove 11 can avoid interference between the rib plate 31 and the bottom plate of the longitudinal beam 1, thereby ensuring smooth switching of the support plate 33 between the storage position and the support position.

[0055] In one embodiment, the crossbeam assembly 2 includes a first crossbeam 21 and a second crossbeam 22. The first crossbeam 21 is connected to the top of the longitudinal beam 1. A fork hole 211 is provided on the first crossbeam 21 along the length direction of the first crossbeam 21. The second crossbeam 22 is connected to the bottom of the longitudinal beam 1. An accommodating space is formed between the first crossbeam 21 and the second crossbeam 22.

[0056] Compared with the related art in which a dedicated fork beam is provided at the bottom of the chassis structure, combining the fork hole 211 with the first beam 21 not only saves the manufacturing cost of the chassis structure, but also increases the height dimension of the accommodating space formed between the first beam 21 and the second beam 22, thereby increasing the volume of structures such as the chassis oil tank 6 accommodated in the accommodating space.

[0057] In a specific embodiment, the cross-sectional area of ​​the fork hole 211 is larger than the cross-sectional area of ​​the fork tine of the forklift.

[0058] In one embodiment, both ends of the fork hole 211 are provided with flared portions 212 , and the area of ​​the flow cross section of the flared portion 212 gradually decreases toward the direction where the other flared portion 212 is located.

[0059] The expansion portion 212 can guide the fork tines during forklift transportation, making it easier for the fork tines of the forklift to be freely inserted.

[0060] In a specific embodiment, the two side walls of the flared portion 212 in the horizontal direction are flared outwardly inclined in a trumpet shape, and the width of the flared portion 212 gradually decreases toward the direction where the other flared portion 212 is located. The maximum width of the flared portion 212 is greater than the width of the fork hole 211, and the difference x between the two satisfies, 10mm≤x≤40mm; preferably, 20mm≤x≤30mm; the optimal difference x is 25mm. The angle α between the side wall of the flared portion 212 and the side hole wall of the fork hole 211 satisfies, 5°≤α≤30°; preferably, 10°≤α≤20°; the optimal angle of the angle α is 15°. The top wall and / or bottom wall of the flared portion 212 in the height direction may also be flared outwardly inclined in a trumpet shape, and the height of the flared portion 212 gradually decreases toward the direction where the other flared portion 212 is located. The size and angle of the top wall and / or bottom wall in the height direction can be reasonably set with reference to the side wall in the horizontal direction. Preferably, the flared portion 212 is provided with only a top wall in the height direction, and the top wall is arranged to be inclined outwards. The flared portion 212 is not provided with a bottom wall in the height direction, so that the fork teeth can enter the flared portion 212 from bottom to top.

[0061] In this embodiment, when the chassis structure needs to be moved from one storage location to another by a forklift, the support pad 3 is in the supporting position under the action of its own gravity, and the fork teeth can hold the bottom surface of the longitudinal beam 1 to transport the chassis structure, and the chassis structure can also be transported through the fork holes 211. When the chassis structure needs to be installed, in order to prevent the bottom surface of the longitudinal beam 1 from pressing the fork teeth of the forklift when the chassis structure is seated, the fork teeth of the forklift can only be transported through the fork holes 211, and before the chassis structure is seated, all the support plates 33 of the support pads 3 are stored in the storage position, and the rib plate 31 is adsorbed and fixed by the fixing part 5. When the chassis structure carried on the forklift needs to be seated, the rib plate 31 can be separated from the fixing part 5 first, and the support plate 33 moves to the supporting position under the action of its own gravity. At this time, the forklift controls the chassis structure to descend, and the chassis structure is supported by the support pad 3.

[0062] According to an embodiment of the utility model, on the other hand, a generator set is provided, comprising the above-mentioned chassis structure. The generator set comprises a generator, a chassis oil tank 6 and other devices, the chassis oil tank 6 can be arranged in the accommodation space between the first cross beam 21 and the second cross beam 22, and the generator can be fixed on the top of the chassis structure.

[0063] In this embodiment, the chassis structure may also be a chassis structure of a motor unit or other devices that require elevated support.

[0064] In this embodiment, the generator set may be a generator set on an engineering machinery.

[0065] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A chassis structure, characterized in that: include: A longitudinal beam (1), having two longitudinal beams arranged opposite to each other; A crossbeam assembly (2), the two ends of which are respectively connected to the two longitudinal beams (1); A support pad (3) has one end rotatably connected to the outer side surface of the longitudinal beam (1), and the other end has a storage position stored on the outer side surface of the longitudinal beam (1), and a support position supported at the bottom of the longitudinal beam (1) to raise the chassis structure; at least one group of support pads (3) is provided on the outer side surface of each longitudinal beam (1).

2. The chassis structure according to claim 1, characterized in that: The support pad (3) comprises: rib(31); A rotating shaft (32) is fixedly connected to one end of the rib plate (31), and the rib plate (31) is rotatably connected to the outer side surface of the longitudinal beam (1) via the rotating shaft (32); A support plate (33) is fixedly connected to the other end of the rib plate (31), and the support plate (33) has the storage position and the support position; a support plane (331) is provided on the side of the support plate (33) facing away from the rib plate (31), and when the support plate (33) is in the support position, the support plane (331) is located below the longitudinal beam (1) and forms a support gap with the bottom surface of the longitudinal beam (1).

3. The chassis structure according to claim 2, characterized in that: It also includes a mounting bracket (4) fixedly connected to the outer side surface of the longitudinal beam (1), and a matching hole (41) is provided on the mounting bracket (4); each group of the supporting pads (3) matches two mounting brackets (4) arranged opposite to each other; both ends of the rotating shaft (32) are provided with protruding ends protruding from the rib plate (31), and the two protruding ends are respectively rotatably inserted into the two matching holes (41).

4. The chassis structure according to claim 3, characterized in that: It also includes a fixing portion (5) connected to the outer side surface of the longitudinal beam (1) and located above the mounting support (4); when the support plate (33) is in the storage position, the fixing portion (5) is used to fix the rib plate (31).

5. The chassis structure according to claim 4, characterized in that: The fixing portion (5) is a magnetic column, on which a countersunk hole (51) is provided, and which is detachably connected to the outer surface of the longitudinal beam (1) via the countersunk hole (51) and a fastener; when the support plate (33) is in the storage position, the magnetic column is used to adsorb the rib plate (31).

6. The chassis structure according to claim 2, characterized in that: An avoidance groove (11) is provided on the bottom plate of the longitudinal beam (1), and when the support plate (33) is in the support position, the rib plate (31) is located at the avoidance groove (11).

7. The chassis structure according to any one of claims 1 to 6, characterized in that: The crossbeam assembly (2) comprises a first crossbeam (21) and a second crossbeam (22); the first crossbeam (21) is connected to the top of the longitudinal beam (1); a fork hole (211) is provided on the first crossbeam (21) along the length direction of the first crossbeam (21); the second crossbeam (22) is connected to the bottom of the longitudinal beam (1); a receiving space is formed between the first crossbeam (21) and the second crossbeam (22).

8. The chassis structure according to claim 7, characterized in that: Expanding portions (212) are respectively provided at both ends of the fork hole (211), and the area of ​​the flow cross section of the expanding portion (212) gradually decreases towards the direction where the other expanding portion (212) is located.

9. The chassis structure according to claim 8, characterized in that: The two side walls of the flared portion (212) in the horizontal direction are flared outwards in a trumpet shape, and the width of the flared portion (212) gradually decreases toward the direction where the other flared portion (212) is located; And / or, the top wall and / or the bottom wall of the flared portion (212) in the height direction is flared outward in a trumpet shape, and the height of the flared portion (212) gradually decreases toward the direction where the other flared portion (212) is located.

10. A generator set, characterized in that: A chassis structure comprising any one of claims 1 to 9.

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