Chassis structure of fracturing truck

Abstract

The utility model discloses a fracturing truck chassis structure, which belongs to the technical field of fracturing truck chassis and comprises a frame, a cab, a first axle, a second axle, a third axle and a fourth axle. The third axle and the fourth axle are mounted through a steel plate spring suspension; the frame comprises a longitudinal beam, a front suspension cross beam, a plurality of middle cross beams, a rear suspension cross beam and a tail cross beam; the rear portion of the longitudinal beam is of a downward-protruding structure. A balance vertical frame is welded to the outer side of the longitudinal beam vertical plate of the downward-protruding structure. The bearing capacity of the frame is effectively improved, the lateral stability of the frame is improved, stress on the frame can be evenly distributed, and local stress concentration and local vibration are reduced. The rigidity and the bearing capacity of the suspension can be adjusted by increasing or decreasing the number of the steel plate springs or adjusting the pre-tightening force of the steel plate springs, vibration generated by uneven road surfaces in the running process of a vehicle can be effectively absorbed and buffered, the bearing capacity and the stability of the vehicle are improved, meanwhile, the maintenance cost is reduced, and the service life of the vehicle is prolonged. And the adaptability and durability of the vehicle under various road conditions are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fracturing vehicle chassis technical field, concretely is a kind of fracturing vehicle chassis structure. BACKGROUND

[0002] Fracturing vehicle is a kind of heavy vehicle specially used for oil and gas well fracturing operation, its main function is to inject high-pressure liquid into downhole, so that rock is cracked, thereby increasing oil and gas production.Fracturing vehicle is composed of vehicle chassis, engine, transmission box, fracturing pump, manifold system, circuit system, gas path system and hydraulic system, and is indispensable important equipment in fossil energy exploitation such as petroleum and natural gas.The core components of fracturing vehicle are carrying chassis, power system (such as engine), transmission system (such as hydraulic mechanical transmission box) and fracturing pump.Among them, fracturing pump is the "heart" of fracturing vehicle, and is responsible for injecting high-pressure liquid into downhole.

[0003] Fracturing vehicle is not only applied to fracturing operation of oil and gas well, but also can be used for hydraulic sandblasting, coal mine high-pressure hydraulic coal mining, ship high-pressure hydraulic rust removal and various scenes.With the development of technology, fracturing vehicle is developing towards high pressure, large displacement, high power, automation and good linkage with supporting equipment.

[0004] Since the on-board equipment of fracturing vehicle is heavy and often travels in bad road conditions, chassis needs to bear various loads and vibrations, and the impact of fracturing pump.The main shortcomings and deficiencies of existing fracturing vehicle chassis mainly include that frame is prone to cracking, fatigue damage, frame structure is prone to failure and fatigue life and the like.The performance of fracturing vehicle chassis, especially in static, dynamic and fatigue life, needs to be improved. INVENTION CONTENTS

[0005] To solve the problems that fracturing vehicle chassis needs to bear various loads, vibrations and the impact of fracturing pump, is prone to cracking, fatigue damage, frame structure is prone to failure and fatigue life and the like, the utility model provides a kind of fracturing vehicle chassis structure.

[0006] The utility model is realized by the following technical schemes:

[0007] A kind of fracturing vehicle chassis structure, including frame, cab, one bridge, two bridges, three bridges and four bridges;One bridge and two bridges are connected and installed with frame by front suspension, three bridges and four bridges are connected and installed with frame by leaf spring suspension;Frame includes the longitudinal beam of two sides and the front suspension cross beam, several intermediate cross beams, rear suspension cross beam and tail cross beam sequentially arranged from front to back connected to two longitudinal beams;Longitudinal beam section is in the shape of H, including longitudinal beam vertical plate in the middle and longitudinal beam upper wing plate and longitudinal beam lower wing plate welded on the upper and lower sides of longitudinal beam vertical plate;Longitudinal beam rear part is in the form of lower convex structure, and its lower convex structure is located between three bridges and four bridges;Balance stand is welded with longitudinal beam upper wing plate and longitudinal beam lower wing plate on the outside of longitudinal beam vertical plate of lower convex structure.

[0008] The further improvement of the utility model still has that the balance vertical frame is a vertical channel steel structure with an opening facing the longitudinal beam vertical plate.

[0009] The further improvement of the utility model still has that the balance vertical frame includes a first balance vertical frame arranged in the middle part of the lower convex structure and a second balance vertical frame arranged in the transition position of the lower convex structure.

[0010] The further improvement of the utility model still has that the front suspension cross beam is arc-shaped with the lower convex structure, and the two ends of the front suspension cross beam are connected and arranged with the front suspension cross beam connecting seat connected and arranged with the lower side of the longitudinal beam; the front suspension cross beam includes the front suspension cross beam vertical plate and the front suspension cross beam upper cover plate and the front suspension cross beam lower cover plate welded on the upper and lower sides of the front suspension cross beam vertical plate; the two ends of one side of the front suspension cross beam vertical plate are welded with the front suspension cross beam support frame, and the front suspension cross beam support frame is welded with the front suspension cross beam upper cover plate, the front suspension cross beam lower cover plate and the front suspension cross beam connecting seat respectively; the two ends of the other side of the front suspension cross beam vertical plate are welded with the front suspension cross beam support plate, and the front suspension cross beam support plate is welded with the front suspension cross beam upper cover plate, the front suspension cross beam lower cover plate and the front suspension cross beam connecting seat respectively.

[0011] The further improvement of the utility model still has that the intermediate cross beam is in the shape of an I-beam, and includes the intermediate cross beam vertical plate in the middle and the intermediate cross beam wing plate welded on the upper and lower sides of the intermediate cross beam vertical plate, and the two ends of the intermediate cross beam vertical plate and the intermediate cross beam wing plate are welded with the longitudinal beam vertical plate respectively; the two ends of the intermediate cross beam wing plate on the front and back sides are welded with the intermediate cross beam connecting plate welded with the longitudinal beam vertical plate respectively.

[0012] The further improvement of the utility model still has that the two ends of the intermediate cross beam vertical plate are provided with the intermediate cross beam vertical plate openings in the middle part.

[0013] The further improvement of the utility model still has that the rear suspension cross beam corresponds with the lower convex structure of the longitudinal beam; the rear suspension cross beam includes the rear suspension cross beam support frame with the two front and back opposite openings in the channel steel structure, and the two rear suspension cross beam support frame web plates are welded through the plurality of vertical rear suspension cross beam support plates; the two ends of the two rear suspension cross beam support frames are welded with the two longitudinal beam vertical plates respectively.

[0014] The further improvement of the utility model still has that the two ends of the rear suspension cross beam support frame web plate are provided with the concave arc-shaped rear suspension cross beam support frame second openings; the middle part of the rear suspension cross beam support frame wing plate is provided with the rear suspension cross beam support frame first opening.

[0015] The further improvement of the utility model still has that the tail cross beam includes the tail cross beam support frame with the opening facing forward in the channel steel structure, and the two vertical tail cross beam support plates are welded in the opening of the tail cross beam support frame; the tail cross beam support plate outer side and the tail cross beam support frame web plate are welded with the tail cross beam connecting plate welded with the longitudinal beam vertical plate; the tail cross beam support frame web plate rear side is connected and arranged with the tow hook device.

[0016] The further improvement of the utility model discloses that the tail beam support plate between the two tail parts is welded with the tail beam reinforcing plate that is attached to the front side of the tail part beam support web.

[0017] From the above technical scheme, the beneficial effects of the utility model are:

[0018] The longitudinal beam of the frame is welded by high-strength steel plates, the two longitudinal beams are connected through the front suspension beam, the plurality of intermediate beams, the rear suspension beam and the tail beam, the lower convex structure is arranged at the rear part of the longitudinal beam, the position is structurally reinforced through the balance stand, the carrying capacity of the frame is effectively improved, the lateral stability of the frame is increased, the stress on the frame is evenly distributed, the local stress concentration and local vibration are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the utility model, the drawings needed to be used in the description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for the ordinary skilled in the art.

[0020] Figure 1 It is the structural schematic diagram of the specific embodiment of the utility model.

[0021] Figure 2 It is the structural schematic diagram of the frame of the specific embodiment of the utility model.

[0022] Figure 3 It is the side view schematic diagram of the frame of the specific embodiment of the utility model.

[0023] Figure 4 It is Figure 2 It is the local enlarged structural schematic diagram of the A part.

[0024] Figure 5 It is the first perspective structural schematic diagram of the front suspension beam of the specific embodiment of the utility model.

[0025] Figure 6 It is the second perspective structural schematic diagram of the front suspension beam of the specific embodiment of the utility model.

[0026] Figure 7The intermediate cross beam structure schematic view of the embodiment of the utility model.

[0027] Figure 8 The rear suspension cross beam first perspective structure schematic view of the embodiment of the utility model.

[0028] Figure 9 The rear suspension cross beam second perspective structure schematic view of the embodiment of the utility model.

[0029] Figure 10 The tail cross beam first perspective structure schematic view of the embodiment of the utility model.

[0030] Figure 11 The tail cross beam second perspective structure schematic view of the embodiment of the utility model.

[0031] In the drawing: 1, cab, 2, front suspension, 3, one axle, 4, two axle, 5, three axle, 6, four axle, 7, frame, 71, longitudinal beam, 711, longitudinal beam vertical plate, 712, longitudinal beam upper wing plate, 713, longitudinal beam lower wing plate, 714, first balance vertical frame, 715, second balance vertical frame, 72, front suspension cross beam, 721, front suspension cross beam vertical plate, 722, front suspension cross beam upper cover plate, 723, front suspension cross beam lower cover plate, 724, front suspension cross beam support frame, 725, front suspension cross beam connecting seat, 726, front suspension cross beam support plate, 73, intermediate cross beam, 731, intermediate cross beam vertical plate, 732, intermediate cross beam wing plate, 733, intermediate cross beam connecting plate, 734, intermediate cross beam vertical plate gap, 74, rear suspension cross beam, 741, rear suspension cross beam support, 742, rear suspension cross beam support plate, 743, rear suspension cross beam connecting plate, 744, rear suspension cross beam support first gap, 745, rear suspension cross beam support second gap, 746, rear suspension cross beam support connecting hole, 75, tail cross beam, 751, tail cross beam support, 752, tail cross beam reinforcing plate, 753, tail cross beam support plate, 754, tail cross beam connecting plate, 755, tail cross beam lightening hole, 756, tow hook device. Embodiment

[0032] In order to make the purpose, characteristics and advantages of the utility model more obvious and easy to understand, the technical scheme in the utility model will be described clearly and completely in combination with the drawings in the embodiment, obviously, the following described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the patent, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of the patent protection.

[0033] As shown in the figure, the utility model discloses a fracturing vehicle chassis structure, including frame 7, cab 1, one axle 3, two axle 4, three axle 5 and four axle 6, one axle 3 and two axle 4 are connected installation through front suspension 2 with frame 7, three axle 5 and four axle 6 are connected installation through leaf spring suspension with frame 7, frame 7 includes the longitudinal beam 71 of both sides and is connected to two longitudinal beam 71 and is set in order from front to back front suspension cross beam 72, a plurality of intermediate cross beam 73, rear suspension cross beam 74 and tail cross beam 75, the longitudinal beam 71 section is I-shaped, including longitudinal beam vertical plate 711 in the middle and the longitudinal beam upper wing plate 712 and longitudinal beam lower wing plate 713 welded on the upper and lower sides of longitudinal beam vertical plate 711, the rear part of longitudinal beam 71 is lower convex structure, and its lower convex structure is between three axle 5 and four axle 6, the outer side of longitudinal beam vertical plate 711 of lower convex structure is welded with the balance vertical frame welded with longitudinal beam upper wing plate 712 and longitudinal beam lower wing plate 713.

[0034] The longitudinal beam 71 of frame 7 is welded by high-strength steel plate, and the two longitudinal beams 71 are connected by front suspension cross beam 72, a plurality of intermediate cross beams 73, rear suspension cross beam 74 and tail cross beam 75, the lower convex structure is arranged at the rear part of longitudinal beam 71 (between three axle 5 and four axle 6), and the balance vertical frame is arranged to strengthen the structure of the position, which effectively improves the carrying capacity of frame 7 and increases the lateral stability of frame 7, helps the uniform distribution of stress on frame 7, reduces local stress concentration and local vibration. Three axle 5 and four axle 6 are connected and installed with frame 7 through leaf spring suspension, the leaf spring can adjust the stiffness and carrying capacity of the suspension by increasing or decreasing the number of pieces or adjusting the pre-tightening force of the spring, which can effectively absorb and buffer the vibration of the vehicle due to uneven road surface during driving, not only improves the carrying capacity and stability of the vehicle, but also reduces the maintenance cost, improves the adaptability and durability of the vehicle under various road conditions. Effectively avoid fracturing vehicle chassis cracking, fatigue damage, frame structure easy to damage failure and other problems.

[0035] The cab 1 is installed on the upper part of the front section of frame 7, the lower part of cab 1 is provided with a power unit, the engine is arranged above one axle 3, the engine is arranged by directly welding the base assembly and the upper mounting support assembly of the engine on frame 7, the base of the engine and the upper mounting support are welded by a panel, a vertical plate and a rib plate.

[0036] The gearbox is arranged in front of the second axle 4; the transfer case is arranged in the middle of the frame 7, and the transfer case is in transmission connection with the power unit through a transmission shaft, the front output shaft of the transfer case is in transmission connection with the first axle 3 and the second axle 4, and the rear output shaft of the transfer case is in transmission connection with the third axle 5 and the fourth axle 6. The power is provided by the power unit, the power is transmitted to the first axle 3, the second axle 4, the third axle 5 and the fourth axle 6 through the transfer case, and the drive of all the axles of the vehicle is realized. The inter-wheel differential lock is arranged on the third axle 5 and the fourth axle 6, so as to prevent the power loss caused by the wheel slip, and thus the passability and the escape ability of the vehicle are improved. Through reasonable distribution of the power, the transfer case can help the fracturing vehicle to maintain stable power output in a complex working environment, and the working efficiency and safety are improved.

[0037] The battery box and the fuel tank are arranged on the left side of the middle of the frame 7, and the urea tank and the fuel tank are arranged on the right side of the frame 7. The heights of the two fuel tanks are kept consistent, and the two fuel tanks are connected in series through two oil-resistant rubber pipes. The urea tank is arranged at a position behind the right second axle, and the battery box, the urea tank and the fuel tank are arranged reasonably, so as to ensure the good balance of the frame 7.

[0038] The engine front and rear support plates, the left front limiting fixed plate assembly, the left rear limiting fixed plate assembly, the fuel tank fixed support and the oil tank support assembly are welded on the left side longitudinal beam 71; the wire passing guard plate, the stabilizer bar upper support, the cab rear suspension base assembly, the exhaust pipe pull rod seat assembly and the oil tank welded base are arranged on the right side longitudinal beam 71.

[0039] The balance stand includes a first balance stand 714 arranged in the middle of the lower convex structure and a second balance stand 715 arranged at a transition position of the lower convex structure. The balance stand is in a vertical channel steel structure with an opening facing the longitudinal beam stand plate 711. The structure of the lower convex structure is reinforced by the first balance stand 714 in the middle and the second balance stands 715 on the front and rear sides, so as to effectively improve the carrying capacity of the frame 7 and increase the lateral stability of the frame 7, which is helpful to the uniform distribution of stress on the frame 7 and reduces local stress concentration and local vibration.

[0040] The front suspension cross beam 72 is in an arc shape with a lower convexity, and the two ends of the front suspension cross beam 72 are connected and arranged with the front suspension cross beam connecting seats 725 connected and arranged with the lower side of the longitudinal beam 71; the front suspension cross beam 72 includes the front suspension cross beam stand plate 721 and the front suspension cross beam upper cover plate 722 and the front suspension cross beam lower cover plate 723 welded on the upper and lower sides of the front suspension cross beam stand plate 721; the front suspension cross beam stand plate 721 is welded with the front suspension cross beam support frames 724 at both ends of one side, and the front suspension cross beam support frames 724 are welded with the front suspension cross beam upper cover plate 722, the front suspension cross beam lower cover plate 723 and the front suspension cross beam connecting seats 725 respectively; the front suspension cross beam stand plate 721 is welded with the front suspension cross beam support plates 726 at both ends of the other side, and the front suspension cross beam support plates 726 are welded with the front suspension cross beam upper cover plate 722, the front suspension cross beam lower cover plate 723 and the front suspension cross beam connecting seats 725 respectively. The front suspension cross beam 72 is used for assembling the front suspension 2, and has simple structure, high strength and light weight.

[0041] Further, the front suspension cross beam support frame 724 is in an L-shaped bending structure, and the front suspension cross beam support plate 726 is in a plate-shaped structure which is arranged obliquely to the front suspension cross beam vertical plate 721. The welding is easy to realize and has high strength.

[0042] The middle cross beam 73 is in an I-shaped cross section, including a middle cross beam vertical plate 731 in the middle and middle cross beam wing plates 732 welded to the upper and lower sides of the middle cross beam vertical plate 731, and the two ends of the middle cross beam vertical plate 731 and the middle cross beam wing plates 732 are welded to the longitudinal beam vertical plates 711; the two ends of the middle cross beam wing plates 732 on the front and rear sides are respectively welded to triangular middle cross beam connecting plates 733 which are welded to the longitudinal beam vertical plates 711. The middle cross beam 73 is light in weight, high in strength, and easy to realize welding.

[0043] Further, the middle cross beam vertical plate 731 is provided with recessed arc-shaped middle cross beam vertical plate cutouts 734 in the middle of the two ends. The line and pipe passing function is realized, and the weight reduction design is realized.

[0044] The rear suspension cross beam 74 corresponds to the lower convex structure of the longitudinal beam 71; the rear suspension cross beam 74 includes two rear suspension cross beam supports 741 which are open in front and back and are in a channel steel structure, the web plates between the two rear suspension cross beam supports 741 are welded through a plurality of vertical rear suspension cross beam support plates 742; the two ends of the two rear suspension cross beam supports 741 are respectively welded to the two longitudinal beam vertical plates 711. The lower side of the lower wing plate of the rear suspension cross beam support 741 is welded to a plurality of vertical rear suspension cross beam connecting plates 743 which are welded to the longitudinal beam vertical plates 711. The rear suspension cross beam 74 is simple in structure, easy to form, high in strength, and light in weight.

[0045] Further, a plurality of corresponding rear suspension cross beam support connecting holes 746 are provided on the web plates of the two rear suspension cross beam supports 741. The compression positioning (through bolt connection) of the welding of the two rear suspension cross beam supports 741 and the middle rear suspension cross beam support plate 742 is realized, and the convenience of welding forming is realized.

[0046] Further, the web plates of the two rear suspension cross beam supports 741 are provided with recessed arc-shaped rear suspension cross beam support second cutouts 745 in the two ends, the line and pipe passing function is realized, and the weight reduction design is realized; the wing plates of the rear suspension cross beam support 741 are provided with rear suspension cross beam support first cutouts 744 in the middle, and the weight reduction design is realized.

[0047] The tail transverse beam 75 comprises a tail transverse beam support 751 in the form of an open forward channel steel structure, two vertical tail transverse beam support plates 753 are welded in the opening of the tail transverse beam support 751, two tail transverse beam connecting plates 754 are welded between the outer side of the tail transverse beam support plate 753 and the web of the tail transverse beam support 751 and are welded with the vertical beam vertical plate 711, and a tow hook device 756 is connected and installed at the rear side of the web of the tail transverse beam support 751. The tail transverse beam 75 has simple structure and high strength, provides convenience for the installation of the tow hook device 756, and does not need additional drilling and modification, thereby reducing the manufacturing process flow, reducing the production cost and improving the production efficiency.

[0048] Further, the tail transverse beam reinforcing plate 752 is welded between the two tail transverse beam support plates 753 and is attached to the front side of the web of the tail transverse beam support 751. The tail transverse beam reinforcing plate 752 and the web of the tail transverse beam support 751 are provided with corresponding tail transverse beam lightening holes 755 in the middle part, so that the tail transverse beam reinforcing plate 752 is conveniently welded with the web of the tail transverse beam support 751, and the installation of the tow hook device 756 is provided with a convenient and sufficient strength installation surface.

[0049] The chassis structure of the fracturing truck, the vertical beams 71 of the frame 7 are welded by high-strength steel plates, the two vertical beams 71 are connected through the front suspension transverse beam 72, the plurality of intermediate transverse beams 73, the rear suspension transverse beam 74 and the tail transverse beam 75, the lower convex structure is arranged at the rear part of the vertical beam 71 (between the third bridge 5 and the fourth bridge 6), the position is structurally reinforced through the balance stand, the carrying capacity of the frame 7 is effectively improved, the lateral stability of the frame 7 is increased, the stress of the frame 7 is evenly distributed, the local stress concentration and local vibration are reduced. The third bridge 5 and the fourth bridge 6 are connected and installed with the frame 7 through the leaf spring suspension, the stiffness and carrying capacity of the suspension can be adjusted by increasing or decreasing the number of pieces or adjusting the pre-tightening force of the spring, the vibration of the vehicle due to the uneven road surface during driving can be effectively absorbed and buffered, the carrying capacity and stability of the vehicle are improved, the maintenance cost is reduced, the adaptability and durability of the vehicle under various road conditions are improved. The problems of fracturing truck chassis cracking, fatigue damage, frame structure easy to damage and failure are effectively avoided.

[0050] The above description of disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fracturing vehicle chassis structure, characterized in that, The vehicle includes a frame (7), a cab (1), a first axle (3), a second axle (4), a third axle (5), and a fourth axle (6); the first axle (3) and the second axle (4) are connected to the frame (7) via a front suspension (2), and the third axle (5) and the fourth axle (6) are connected to the frame (7) via a leaf spring suspension; the frame (7) includes longitudinal beams (71) on both sides and a front suspension crossbeam (72), several intermediate crossbeams (73), and a rear suspension crossbeam (74) arranged sequentially from front to back on the two longitudinal beams (71). The longitudinal beam (71) has an I-shaped cross section, including a middle longitudinal beam plate (711) and upper and lower longitudinal beam flanges (712 and 713) welded to the upper and lower sides of the longitudinal beam plate (711); the rear of the longitudinal beam (71) has a downward convex structure, and its downward convex structure is located between the three bridges (5) and the four bridges (6); the outer side of the longitudinal beam plate (711) with the downward convex structure is fitted with a balance frame welded to the upper and lower longitudinal beam flanges (712 and 713).

2. The fracturing truck chassis structure according to claim 1, characterized in that, The balancing support is a vertical channel steel structure with an opening facing the longitudinal beam plate (711).

3. The fracturing truck chassis structure according to claim 1, characterized in that, The balancing frame includes a first balancing frame (714) located in the middle of the convex structure and a second balancing frame (715) located at the transition position of the convex structure.

4. The fracturing truck chassis structure according to claim 1, characterized in that, The front suspension crossbeam (72) is convex in shape, and its two ends are connected to front suspension crossbeam connecting seats (725) that are connected to the lower side of the longitudinal beam (71); the front suspension crossbeam (72) includes a front suspension crossbeam upright plate (721) and a front suspension crossbeam upper cover plate (722) and a front suspension crossbeam lower cover plate (723) welded to the upper and lower sides of the front suspension crossbeam upright plate (721); front suspension crossbeam support frames (724) are welded to both ends of one side of the front suspension crossbeam upright plate (721). The front suspension crossbeam support frame (724) is welded to the front suspension crossbeam upper cover plate (722), the front suspension crossbeam lower cover plate (723) and the front suspension crossbeam connecting seat (725) respectively; the front suspension crossbeam support plate (726) is welded to both ends of the other side of the front suspension crossbeam upright plate (721), and the front suspension crossbeam support plate (726) is welded to the front suspension crossbeam upper cover plate (722), the front suspension crossbeam lower cover plate (723) and the front suspension crossbeam connecting seat (725) respectively.

5. The fracturing truck chassis structure according to claim 1, characterized in that, The cross section of the intermediate crossbeam (73) is I-shaped, including the intermediate crossbeam upright plate (731) in the middle and the intermediate crossbeam flange plate (732) welded to the upper and lower sides of the intermediate crossbeam upright plate (731). The two ends of the intermediate crossbeam upright plate (731) and the intermediate crossbeam flange plate (732) are respectively welded to the longitudinal beam upright plate (711); the two ends of the front and rear sides of the intermediate crossbeam flange plate (732) are respectively welded to the intermediate crossbeam connecting plate (733) welded to the longitudinal beam upright plate (711).

6. The fracturing truck chassis structure according to claim 5, characterized in that, The middle crossbeam vertical plate (731) has openings (734) at the middle of both ends.

7. The fracturing truck chassis structure according to claim 1, characterized in that, The rear suspension crossbeam (74) corresponds to the downward convex structure of the longitudinal beam (71); the rear suspension crossbeam (74) includes two channel steel structures with back-to-back openings (741), and the webs of the two rear suspension crossbeam supports (741) are welded together by several vertical rear suspension crossbeam support plates (742); the two ends of the two rear suspension crossbeam supports (741) are respectively welded to the vertical plates (711) of the two longitudinal beams.

8. The fracturing truck chassis structure according to claim 7, characterized in that, The rear suspension beam support (741) has a concave arc-shaped second notch (745) at both ends of the web plate; the rear suspension beam support (741) has a first notch (744) in the middle of the wing plate.

9. The fracturing truck chassis structure according to claim 1, characterized in that, The tail beam (75) includes a tail beam support (751) with an open front channel steel structure. Two vertical tail beam support plates (753) are welded inside the opening of the tail beam support (751). A tail beam connecting plate (754) that is welded to the longitudinal beam upright plate (711) is welded between the outer side of the tail beam support plate (753) and the web of the tail beam support (751). A tow hook device (756) is connected and installed on the rear side of the web of the tail beam support (751).

10. The fracturing truck chassis structure according to claim 9, characterized in that, A tail beam reinforcing plate (752) is welded between the two tail beam support plates (753) and is attached to the front side of the web of the tail beam bracket (751).

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