Frame assembly and pump truck

Abstract

The present application relates to the field of pump truck production and manufacturing, in particular to a frame assembly and a pump truck. The frame assembly comprises a sub-frame and a chassis, the sub-frame comprises a sub-frame body and a diagonal brace, the chassis is detachably installed on the top of the front end of the sub-frame body, and the two ends of the diagonal brace are detachably connected to the sub-frame body and the chassis. In the present application, if the diagonal brace is damaged, the damaged diagonal brace is removed, and the intact diagonal brace is assembled, without cutting and re-welding, reducing the maintenance difficulty of the diagonal brace. Moreover, since the diagonal brace does not need to be welded during assembly, a large amount of harmful smoke generated during welding of the diagonal brace is avoided, laying a foundation for intelligent manufacturing and green manufacturing.

Description

Technical Field

[0001] This invention relates to the field of pump truck manufacturing, and more specifically to chassis assemblies and pump trucks. Background Technology

[0002] The pump truck consists of a subframe and a chassis. The subframe comprises longitudinal beams and diagonal braces, with the diagonal braces welded to the longitudinal beams to form the subframe assembly. The chassis and subframe are assembled together by welding. The chassis is welded to the longitudinal beams of the subframe at the bottom and to the diagonal braces at the rear, before being mounted onto the chassis. The assembly of the subframe and the chassis beams also requires welding. During assembly, the welding process generates a large amount of dust, and the welded parts require touch-up painting after the vehicle rolls off the production line. Current production processes cannot achieve green manufacturing. Furthermore, separating the subframe and chassis after welding the chassis to the subframe is very difficult. If any part of the chassis or subframe is damaged, the entire assembly must be replaced, resulting in high repair costs and hindering future maintenance and remanufacturing. Summary of the Invention

[0003] The purpose of this invention is to eliminate the welding process when assembling the subframe and underframe during the pump truck assembly process, thereby reducing the dust and fumes generated by the welding process and laying the foundation for green and intelligent manufacturing.

[0004] To achieve the above objectives, the present invention provides a vehicle frame assembly, which includes a subframe and a chassis. The subframe includes a subframe body and a diagonal brace. The chassis is detachably mounted on the top of the first end of the subframe body, and the two ends of the diagonal brace are detachably connected to the subframe body and the chassis, respectively.

[0005] In some embodiments, there are two diagonal braces, which are horizontally spaced apart. The underframe has two horizontally spaced first connecting plates on the side facing the diagonal braces. The first connecting plates extend along the length of the subframe body in a vertical plane. The ends of the two diagonal braces are detachably assembled with the two first connecting plates respectively.

[0006] In some embodiments, the first connecting plate includes a plate connecting portion and a plate cantilever portion connected to each other along its length direction. The plate connecting portion is fixedly connected to the base frame, and the plate cantilever portion extends toward the diagonal brace. The diagonal brace includes a support base plate extending in a vertical plane, and the support base plate is abutted against the outer side of the plate cantilever portion of the first connecting plate. The support base plate is connected to the plate cantilever portion of the first connecting plate by a plurality of bolt assemblies. Alternatively, the support base plate is connected to the plate cantilever portion of the first connecting plate by a first pin and a plurality of bolt assemblies.

[0007] In some embodiments, the diagonal brace further includes two support side plates extending along the bottom edge and top edge of the support base plate, respectively, and the support side plates are detachably connected to the base frame via anti-torsional reinforcement plates.

[0008] In some embodiments, the diagonal brace further includes a plurality of support members that are U-shaped and spaced apart from each other, with the two ends of the support members connected to two support side plates respectively.

[0009] In some embodiments, two horizontally spaced mounting plates are installed on the top of the subframe body, and the ends of the two diagonal braces are detachably assembled with the two mounting plates respectively.

[0010] In some embodiments, the subframe body includes two horizontally spaced longitudinal beams, and two mounting plates are respectively mounted on the top of the two longitudinal beams; the mounting plates are closer to the outer side of the longitudinal beams than to the inner side of the longitudinal beams; the mounting plates extend along the length of the subframe body in a vertical plane, and the diagonal brace includes a vertically extending support base plate that abuts against the outer side of the mounting plate; wherein the support base plate and the mounting plate are connected by a plurality of bolt assemblies; or, the support base plate and the mounting plate are connected by a second pin and a plurality of bolt assemblies.

[0011] In some embodiments, the side of the underframe facing away from the diagonal brace is connected to the front end of the subframe body via a first detachable connection structure; and / or the side of the underframe facing the diagonal brace is connected to the subframe via a second detachable connection structure.

[0012] In some embodiments, the frame longitudinal beam includes a vertically extending web and two horizontally extending, vertically spaced flanges, the inner side of the web facing another frame longitudinal beam, and the two flanges connected to the inner side of the web; there are two first detachable connection structures, each corresponding to one of the two frame longitudinal beams; each first detachable connection structure includes a second connecting plate mounted on the underframe and extending vertically, a third connecting plate mounted on the underframe and extending horizontally, a first pad, and a first threaded plate; the second connecting plate is attached to the outer side of the web; along the direction from the outer side to the inner side of the web, the first pad, the second connecting plate, the web, and the first threaded plate are sequentially distributed and connected by a plurality of bolts; the third connecting plate is attached to the top surface of the upper flange, and the third connecting plate and the upper flange are connected by a plurality of bolt assemblies. The connection includes: a vertically extending web and two horizontally extending, vertically spaced flanges, the inner side of the web facing another frame longitudinal beam, and the two flanges connected to the inner side of the web; two second detachable connection structures are provided, each corresponding to one of the two frame longitudinal beams; the second detachable connection structure includes a fourth connecting plate mounted on the underframe and extending vertically, a fifth connecting plate mounted on the underframe and extending horizontally, a second pad, and a second threaded plate; the fourth connecting plate is attached to the outer side of the web; along the direction from the outer side to the inner side of the web, the second pad, the fourth connecting plate, the web, and the second threaded plate are sequentially distributed and connected by a plurality of bolts; the fifth connecting plate is attached to the top surface of the upper flange, and the fifth connecting plate is connected to the upper flange by a plurality of bolt assemblies.

[0013] The present invention also provides a pump truck that includes the aforementioned chassis assembly.

[0014] The technical solution of the present invention has the following beneficial effects:

[0015] If a diagonal brace is damaged, simply remove the damaged brace and assemble the intact one; no cutting or re-welding is required, reducing the difficulty of maintenance. Furthermore, since no welding is needed during brace assembly, it avoids the large amounts of harmful fumes produced during welding, laying the foundation for intelligent and green manufacturing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a frame assembly in one embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the installation of the first end of the diagonal brace in one embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the installation of the anti-torsion reinforcement plate in one embodiment of the present invention;

[0019] Figure 4This is a schematic diagram of the installation of the end of the diagonal brace in one embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the installation of the end of the diagonal brace in another embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the installation of the support member in one embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the connection between the chassis and the subframe body in one embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the connection of the first detachable connection structure in one embodiment of the present invention;

[0024] Figure 9 This is a schematic diagram of the connection between the chassis and the subframe body in one embodiment of the present invention;

[0025] Figure 10 This is a schematic diagram of the connection of the second detachable connection structure in one embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures

[0027] 1. Underframe; 11. First connecting plate; 12. First pin; 13. Torsional reinforcement plate; 14. Second connecting plate; 15. Third connecting plate; 16. Fourth connecting plate; 17. Fifth connecting plate; 2. Subframe body; 21. Mounting plate; 22. Frame longitudinal beam; 221. Web plate; 222. Wing plate; 3. Diagonal brace; 31. Support base plate; 32. Support side plate; 33. Support component; 34. Second pin; 35. First pad; 36. First threaded plate; 37. Second pad; 38. Second threaded plate. Detailed Implementation

[0028] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present invention and not to limit the present invention. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present invention by illustrating examples of the invention.

[0029] like Figure 1 As shown, the present invention provides a vehicle frame assembly, which includes a subframe and a base frame 1. The subframe includes a subframe body 2 and a diagonal brace 3. The base frame 1 is detachably mounted on the top of the first end of the subframe body 2, and the two ends of the diagonal brace 3 are detachably connected to the subframe body 2 and the base frame 1, respectively.

[0030] Specifically, the first end of the diagonal brace 3 faces the first end of the subframe body 2 and the base frame 1, and the last end of the diagonal brace 3 faces the last end of the subframe body 2. The base frame 1 adopts an assembly structure for easy disassembly and maintenance.

[0031] In this embodiment, if the diagonal brace 3 is damaged, the damaged diagonal brace 3 can be removed and the intact diagonal brace 3 can be assembled. There is no need for cutting and re-welding, which reduces the maintenance difficulty of the diagonal brace 3. Moreover, since no welding is required when assembling the diagonal brace 3, the generation of a large amount of fumes harmful to health during welding of the diagonal brace 3 is avoided, laying the foundation for intelligent manufacturing and green manufacturing.

[0032] Furthermore, in traditional pump trucks, after the traditional diagonal brace welding is completed, the paint on the welded area is damaged, requiring localized repainting and subsequent baking paint application. Since the paint on the connection points is reworked, the paint finish on the connection points may differ from other parts, affecting the overall coating quality of the device. However, in this embodiment, welding is not required when assembling the diagonal brace 3, so the connection points of the diagonal brace 3 do not need to be repainted, and the paint finish on the entire frame assembly remains the original, ensuring consistent coating quality. Moreover, the diagonal brace 3 and the subframe body 2 are two independent parts, facilitating transportation.

[0033] In addition, those skilled in the art will understand that, along the length of the subframe body 2, the diagonal brace 3 extends obliquely from its end to its beginning from bottom to top, and of course, the length of the subframe body 2 is the longitudinal direction of the pump truck.

[0034] In some embodiments, the two ends of the diagonal brace 3 can be detachably connected to the subframe body 2 and the base frame 1 respectively via flange structures. The two ends of the diagonal brace 3 can also be detachably connected to the subframe body 2 and the base frame 1 respectively via threaded structures. This invention does not impose any limitations.

[0035] like Figure 1 As shown, in some embodiments of the present invention, there are two diagonal braces 3, which are horizontally spaced apart. The base frame 1 has two horizontally spaced first connecting plates 11 on the side facing the diagonal braces 3. The first connecting plates 11 extend along the length direction of the subframe body 2 in the vertical plane. The first ends of the two diagonal braces 3 are respectively detachably assembled with the two first connecting plates 11.

[0036] Specifically, the first end of the diagonal brace 3 is detachably connected to the first connecting plate 11, and the last end of the diagonal brace 3 is detachably connected to the subframe body 2. Those skilled in the art will understand that, compared to welding assembly, detachable assembly requires higher installation precision. The first connecting plate 11 is a plate with a connecting plane, so it is easy for the first connecting plate 11 to fit or align with the diagonal brace 3, thus facilitating accurate assembly of the diagonal brace 3. Of course, the first connecting plate 11 and the diagonal brace 3 can be connected by a pin or by a bolt assembly; this invention does not impose any limitations.

[0037] like Figure 2 As shown, in some embodiments of the present invention, the first connecting plate 11 includes a plate connecting portion and a plate cantilever portion connected to each other along its length direction. The plate connecting portion is fixedly connected to the base frame 1, and the plate cantilever portion extends toward the diagonal brace 3. The diagonal brace 3 includes a support base plate 31 extending in a vertical plane, and the support base plate 31 is abutted against the outer side of the plate cantilever portion of the first connecting plate 11; wherein, the support base plate 31 and the plate cantilever portion of the first connecting plate 11 are connected by a plurality of bolt assemblies; or, the support base plate 31 and the plate cantilever portion of the first connecting plate 11 are connected by a first pin 12 and a plurality of bolt assemblies.

[0038] Specifically, the inward side of the first connecting plate 11 refers to the side of the first connecting plate 11 facing the other first connecting plate 11, and the outward side of the first connecting plate 11 refers to the side of the first connecting plate 11 facing away from the other first connecting plate 11. The first connecting plate 11 and the supporting base plate 31 extend in a vertical plane, so they are parallel to each other. The cantilever portion of the first connecting plate 11 extends outward towards the diagonal brace 3 as a cantilever, to facilitate assembly with the first end of the diagonal brace 3. Moreover, since the first connecting plate 11 is a plate component, the cantilever portion of the plate has a small adjustment space under slight stress during the assembly process with the diagonal brace 3, which helps the cantilever portion of the plate fit snugly against the supporting base plate 31 and increases assembly flexibility.

[0039] In addition, in this embodiment, the holes on the support base plate 31 for mounting the bolt assembly are oblong holes, the length of which extends along the length of the diagonal brace 3; the holes on the first connecting plate 11 for mounting the bolt assembly are also oblong holes, the length of which extends along the width of the diagonal brace 3. When assembling the diagonal brace 3, the bolt assembly can be adjusted in position within the two oblong holes, thereby eliminating the influence of manufacturing errors and facilitating accurate assembly of the diagonal brace 3.

[0040] In some embodiments, the cantilever portion of the support base plate 31 and the first connecting plate 11 is connected by a first pin 12 and a plurality of bolt assemblies. For example, when assembling the chassis 1, subframe body 2, and diagonal brace 3, the first end of the diagonal brace 3 and the cantilever portion of the first connecting plate 11 are assembled first. That is, the first pin 12 is first inserted into the pin hole of the cantilever portion of the plate and the pin hole of the supporting base plate 31, so that the first end of the diagonal brace 3 is accurately positioned on the cantilever portion of the plate. Then, the end of the diagonal brace 3 and the subframe body 2 are assembled. The diagonal brace 3 can be rotated or moved laterally by means of the first pin 12 to make multi-angle fine adjustments, so as to facilitate the accurate assembly of the connection position of the end of the diagonal brace 3 with the connection position of the subframe body 2. After the end of the diagonal brace 3 is assembled, the first end of the diagonal brace 3 is fixed. That is, the first end of the diagonal brace 3 and the cantilever portion of the plate are installed and fixed by bolt assembly. During the tightening of the bolt assembly, the cantilever portion of the plate can gradually come into contact with the supporting base plate 31. Finally, the assembly of the diagonal brace 3 is completed. Therefore, during assembly, the first pin 12 has a positioning function. The first end of the diagonal brace 3 is positioned to the cantilever portion of the first connecting plate 11 via the first pin 12, achieving precise assembly of the first end of the diagonal brace 3. Furthermore, the first pin 12 increases assembly flexibility. During the assembly of the end of the diagonal brace 3 with the subframe body 2, the first end of the diagonal brace 3 can rotate or laterally move slightly via the first pin 12 to align the connection position of the end of the diagonal brace 3 with the connection position of the subframe body 2, avoiding assembly difficulties due to errors. Additionally, the first pin 12 helps prevent misalignment between the first connecting plate 11 and the support base plate 31, thereby preventing bolt assembly from falling off. Moreover, the first pin 12 has better shear resistance than bolt assemblies; it can resist larger shear forces, helping to enhance the connection strength at the first connecting plate 11. Furthermore, the number of bolt assemblies can be appropriately reduced after setting the first pin 12.

[0041] In other embodiments, the cantilever portion of the first connecting plate 11 and the supporting base plate 31 can be connected solely by a plurality of bolt assemblies. For ease of assembly, the cantilever portion of the plate and the supporting base plate 31 can employ oblong holes.

[0042] In some embodiments of the present invention, the length of the cantilever portion of the plate is in the range of 350mm-450mm, preserving sufficient length or area for connection with the diagonal brace 3. For example, the length of the first connecting plate 11 is 900mm, and the length of the cantilever portion of the plate is 385mm.

[0043] In some embodiments of the present invention, the length of the first connecting plate 11 is 2-3 times the length of the cantilever portion of the plate. That is, the length of the cantilever portion of the plate is 1 / 3-1 / 2 of the length of the first connecting plate 11. The cantilever portion of the plate retains sufficient length or area to connect with the diagonal brace, while the connecting portion of the plate also retains sufficient length or area to connect with the base frame 1.

[0044] like Figure 3 As shown, in some embodiments of the present invention, the diagonal brace 3 further includes two support side plates 32 extending along the bottom edge and top edge of the support base plate 31, respectively. The support side plates 32 are detachably assembled with the base frame 1 via anti-torsion reinforcing plates 13.

[0045] Specifically, the diagonal brace 3 includes a base plate 31 and two side plates 32, forming a U-shaped structure. Alternatively, the base plate 31 and the two side plates 32 form a U-shaped groove with an opening facing outwards from the first connecting plate 11. The base plate 31 is a long strip extending in a vertical plane, and its thickness is horizontal. While this facilitates assembly, it has poor torsional resistance and is prone to deformation. The side plates 32 increase the cross-section of the base plate 31, enhancing its structural strength and making it less susceptible to deformation. On the other hand, the first connecting plate 11 is a single-layer plate structure with good flexibility. While this facilitates assembly, it also has poor torsional resistance and is prone to deformation. The torsional reinforcement plate 13 strengthens the connection between the diagonal brace 3 and the base frame 1, reducing the stress on the first connecting plate 11 and preventing deformation. Of course, the torsional reinforcement plate 13 and the side plates 32 can be connected by multiple bolt assemblies.

[0046] In some embodiments, the support side plate 32 has multiple oblong holes, the length direction of which is consistent with the length direction of the support side plate 32. The anti-torsion reinforcing plate 13 also has multiple oblong holes, the length direction of which is consistent with the width direction of the support side plate 32. Furthermore, the oblong holes on the support side plate 32 and the oblong holes on the anti-torsion reinforcing plate 13 correspond one-to-one. This arrangement of the oblong holes facilitates the adjustment and installation position of the bolt assemblies, ensuring that all bolt assemblies are installed in place.

[0047] In some embodiments, such as Figure 3 As shown, the anti-torsion reinforcing plate 13 further includes a first connecting portion and a second connecting portion, which are integrally formed. The first connecting portion is attached and connected to the base frame 1, and the second connecting portion is attached and connected to the supporting side plate 32. The first connecting portion and the second connecting portion can extend along the same plane, and the first connecting portion and the second connecting portion can form an acute angle, a right angle, or an obtuse angle.

[0048] In some embodiments, there are multiple torsion reinforcement plates 13, and these torsion reinforcement plates 13 further include a first torsion reinforcement plate, a second torsion reinforcement plate, and a third torsion reinforcement plate. The first torsion reinforcement plate is a flat plate located above the diagonal brace 3. One end of the first torsion reinforcement plate has its bottom surface abutting against the base frame 1 and connected to each other by multiple bolt assemblies; its other end is abutting against the top surface of the support side plate 32 and is also connected to each other by multiple bolt assemblies. The second torsion reinforcement plate is an L-shaped plate. A first section of the second torsion reinforcement plate extends upwards and abuts against the side of the base frame 1, and the two are connected to each other by multiple bolt assemblies. A second section of the second torsion reinforcement plate extends along the length of the diagonal brace 3 and abuts against the bottom surface of the support side plate 32, and the two are connected to each other by multiple bolt assemblies. The third torsion reinforcement plate is an L-shaped plate. A first section of the third torsion reinforcement plate extends downwards and abuts against the bottom surface of the second section of the second torsion reinforcement plate, and the two are connected to each other by multiple bolt assemblies.

[0049] like Figure 4 As shown, in some embodiments of the present invention, the diagonal brace 3 further includes a plurality of support members 33 that are U-shaped and spaced apart from each other, and the two ends of the support members 33 are respectively connected to two support side plates 32.

[0050] Specifically, to avoid assembly issues caused by manufacturing errors in the diagonal brace 3, the diagonal brace 3 is made of a single-layer board material with a certain degree of flexibility. However, this type of board has poor torsional resistance and is prone to deformation. The support member 33 is U-shaped, which facilitates the fit and connection between the end face of the support member 33 and the support side plate 32. Furthermore, the support member 33 can firmly connect the two support side plates 32 together, forming a more stable load-bearing whole with the support base plate 31, the two support side plates 32, and the multiple support members 33, thus enhancing the deformation resistance of the diagonal brace 3. Moreover, the diagonal brace 3 can be made of a single-layer board material with a certain degree of flexibility, which facilitates assembly.

[0051] Of course, the support member 33 is located on the side of the diagonal brace 3 with the U-shaped groove opening, that is, the support member 33 and the U-shaped groove opening of the diagonal brace 3 are arranged opposite to each other.

[0052] like Figure 5 and Figure 6 As shown, in some embodiments of the present invention, two horizontally spaced mounting plates 21 are installed on the top of the subframe body 2, and the ends of the two diagonal braces 3 are detachably connected to the two mounting plates 21 respectively.

[0053] Specifically, those skilled in the art will understand that, compared to welding connections, detachable connections require higher installation precision. The mounting plate 21 is a plate with a connecting plane, so it is easy for the mounting plate 21 to fit or align with the diagonal brace 3, thus facilitating accurate assembly of the diagonal brace 3. Of course, the mounting plate 21 and the diagonal brace 3 can be connected by a pin or by a bolt assembly; this invention does not impose any limitations.

[0054] like Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the subframe body 2 includes two horizontally spaced longitudinal beams 22, and two mounting plates 21 are respectively mounted on the top of the two longitudinal beams 22. The mounting plates 21 are closer to the outward side of the longitudinal beams 22 than to the inward side of the longitudinal beams 22; the mounting plates 21 extend along the length of the subframe body 2 in a vertical plane, and the diagonal brace 3 includes a vertically extending support base plate 31, which is attached to the outer side of the mounting plate 21. The support base plate 31 and the mounting plate 21 are connected by a plurality of bolt assemblies; or, the support base plate 31 and the mounting plate 21 are connected by a second pin 34 and a plurality of bolt assemblies.

[0055] Specifically, the inward side of the frame longitudinal beam 22 refers to the side of the frame longitudinal beam 22 facing another frame longitudinal beam 22, and the outward side of the frame longitudinal beam 22 refers to the side of the frame longitudinal beam 22 facing away from another frame longitudinal beam 22. Of course, the frame longitudinal beam 22 extends longitudinally along the pump truck. In addition, multiple oblong holes can be provided on the mounting plate 21, with the length direction of these oblong holes extending vertically; multiple oblong holes can be provided on the support base plate 31, with the length direction of these oblong holes extending along the length direction of the support base plate 31; and the oblong holes on the mounting plate 21 and the oblong holes on the support base plate 31 correspond one-to-one. This arrangement of oblong holes facilitates the adjustment and installation position of the bolt assemblies, ensuring that all bolt assemblies are installed in place.

[0056] In traditional pump trucks, the conventional diagonal braces are square tubular structures. To increase the welding area between the conventional diagonal braces and the longitudinal beams of the chassis, the ends of the conventional diagonal braces are welded to the middle of the top surface of the longitudinal beams, while the beginnings are welded to the chassis. If the two conventional diagonal braces are set parallel to each other, this arrangement results in a small gap between them, causing interference with the pump truck boom in the retracted state. Therefore, in practice, the beginning of one of the conventional diagonal braces is set to be tilted outward, meaning the gap between the beginnings of the two conventional diagonal braces is greater than the gap between their ends, to facilitate the retraction of the pump truck boom. However, this arrangement creates structural differences between the two conventional diagonal braces, requiring them to be manufactured using different materials and positioned using specialized tooling during the manufacturing process. However, in this embodiment, the mounting plate 21 is closer to the outward side of the longitudinal beam 22 of the frame, which makes the diagonal brace 3 mounted on the mounting plate 21 also closer to the outward side of the longitudinal beam 22 of the frame. This helps to increase the horizontal distance between the two diagonal braces 3. The diagonal braces 3 will not interfere with the boom of the pump truck in the retracted state. The diagonal braces 3 do not need to be tilted or offset, so the two diagonal braces 3 can be arranged in parallel, and thus the two diagonal braces 3 can be made of the same material. The use of the same material and parallel arrangement of the two diagonal braces 3 is beneficial for controlling manufacturing errors.

[0057] In some embodiments, the support base plate 31 and the mounting plate 21 are connected by a second pin 34 and a plurality of bolt assemblies. For example, when assembling the chassis 1, the subframe body 2, and the diagonal brace 3, the first end of the diagonal brace 3 and the cantilever portion of the first connecting plate 11 are assembled first, that is, the first pin 12 is first inserted into the pin hole of the cantilever portion of the plate and the pin hole of the support base plate 31, so that the first end of the diagonal brace 3 is accurately positioned on the cantilever portion of the plate; then the end of the diagonal brace 3 and the subframe body 2 are assembled, and the diagonal brace 3 can be finely adjusted at multiple angles with the aid of the first pin 12, so that the pin hole at the end of the diagonal brace 3 is aligned with the mounting plate 21. After aligning the pin holes, the second pin 34 is inserted into the pin hole at the end of the diagonal brace 3 and the pin hole in the mounting plate 21. Then, both ends of the diagonal brace 3 are fixed, i.e., the first end of the diagonal brace 3 and the cantilever of the plate are installed and fixed using bolt assemblies, and the end of the diagonal brace 3 and the mounting plate 21 are installed and fixed using bolt assemblies. During the tightening of the bolt assemblies, the cantilever of the plate gradually comes into contact with the support base plate 31, and the mounting plate 21 gradually comes into contact with the support base plate 31. Finally, the diagonal brace 3 is assembled. Therefore, during the assembly process, the second pin 34 has a positioning function; the end of the diagonal brace 3 is positioned to the mounting plate 21 via the second pin 34, achieving precise assembly of the end of the diagonal brace 3. Furthermore, the second pin 34 increases the flexibility of the assembly. If the end of the diagonal brace 3 is assembled first, the end of the diagonal brace 3 can be rotated or moved laterally by the second pin 34 to align the pin hole at the first end of the diagonal brace 3 with the pin hole in the cantilever of the plate, avoiding assembly difficulties due to errors. In addition, the second pin 34 helps prevent misalignment between the mounting plate 21 and the support base plate 31, thereby preventing the bolt assembly from falling off. Furthermore, the second pin 34 has better shear resistance than the bolt assembly; it can withstand greater shear forces, thus enhancing the connection strength at the mounting plate 21. Moreover, the number of bolt assemblies can be appropriately reduced by installing the second pin 34.

[0058] It should be noted that in traditional pump trucks, the traditional diagonal brace, traditional underframe, and traditional subframe body are connected by welding, and the installation accuracy does not need to be very high. However, the goal of this application is to eliminate welding and achieve overall assembly, which places more stringent requirements on installation accuracy. In this invention, the diagonal brace 3 and the underframe 1 can be positioned by the first pin 12, and the diagonal brace 3 and the subframe body 2 can be positioned by the second pin 34, so that the three can be precisely positioned; then, a part of the bolt assembly fixes the diagonal brace 3 and the underframe 1, and another part of the bolt assembly fixes the diagonal brace 3 and the subframe body 2, and both the first connecting plate 11 and the mounting plate 21 have a certain degree of assembly flexibility, which can overcome manufacturing errors and enable the diagonal brace 3 to complete high-quality assembly.

[0059] like Figure 7As shown, in some embodiments of the present invention, one side of the back-facing diagonal brace 3 of the base frame 1 is connected to the front end of the subframe body 2 through a first detachable connection structure.

[0060] like Figure 9 As shown, in some embodiments of the present invention, the side of the base frame 1 facing the diagonal brace 3 is connected to the subframe body 2 via a second detachable connection structure.

[0061] Specifically, the underframe 1 is connected to the subframe body 2 through a first detachable connection structure and / or a second detachable connection structure, which helps to achieve the assembly connection of the entire pump truck.

[0062] like Figure 8 As shown, in some embodiments of the present invention, the frame longitudinal beam 22 includes a vertically extending web 221 and two horizontally extending and vertically spaced flanges 222. The inner side of the web 221 faces the other frame longitudinal beam 22, and the two flanges 222 are connected to the inner side of the web 221. There are two first detachable connection structures, each corresponding to one of the two frame longitudinal beams 22. The first detachable connection structure includes a second connecting plate 14 mounted on the base frame 1 and extending vertically, a third connecting plate 15 mounted on the base frame 1 and extending horizontally, a first pad 35, and a first threaded plate 36; the second connecting plate 14 is attached to the outer side of the web plate 221; along the direction from the outer side to the inner side of the web plate 221, the first pad 35, the second connecting plate 14, the web plate 221, and the first threaded plate 36 are sequentially distributed and connected by a plurality of bolts; the third connecting plate 15 is attached to the top surface of the upper wing plate 222, and the third connecting plate 15 is connected to the upper wing plate 222 by a plurality of bolt assemblies.

[0063] Specifically, the holes for mounting bolts in the second connecting plate 14 can be oblong holes extending vertically in the length direction, the holes for mounting bolts in the web plate 221 can be oblong holes extending horizontally in the length direction, and the holes for mounting bolts in the third connecting plate 15 can be oblong holes extending horizontally in the length direction, so as to facilitate bolt position adjustment and thus help accurate installation between the underframe 1 and the subframe body 2. The first threaded plate 36 is provided with a threaded hole with internal threads, and the end of the bolt is connected to the threaded hole so that the first washer 35, the third connecting plate 15, and the first web plate 221 are clamped between the bolt head and the first threaded plate 36.

[0064] like Figure 10As shown, in some embodiments of the present invention, the frame longitudinal beam 22 includes a vertically extending web 221 and two horizontally extending and vertically spaced wing plates 222, the inner side of the web 221 facing the other frame longitudinal beam 22, and the two wing plates 222 connected to the inner side of the web 221; the number of second detachable connection structures is two, and the two second detachable connection structures correspond to the two frame longitudinal beams 22 respectively. The second detachable connection structure includes a fourth connecting plate 16 mounted on the base frame 1 and extending vertically, a fifth connecting plate 17 mounted on the base frame 1 and extending horizontally, a second pad plate 37, and a second threaded plate 38; the fourth connecting plate 16 is attached to the outer side of the web plate 221; along the direction from the outer side to the inner side of the web plate 221, the second pad plate 37, the fourth connecting plate 16, the web plate 221, and the second threaded plate 38 are sequentially distributed and connected by a plurality of bolts; the fifth connecting plate 17 is attached to the top surface of the upper wing plate 222, and the fifth connecting plate 17 is connected to the upper wing plate 222 by a plurality of bolt assemblies.

[0065] Specifically, the bolt mounting holes in the fourth connecting plate 16 can be oblong holes extending vertically in the length direction, the bolt mounting holes in the web plate 221 can be oblong holes extending horizontally in the length direction, and the bolt mounting holes in the fifth connecting plate 17 can be oblong holes extending horizontally in the length direction, to facilitate bolt position adjustment. The second threaded plate 38 is provided with a threaded hole with internal threads, and the end of the bolt is connected to the threaded hole so that the first washer plate 35, the third connecting plate 15, and the first web plate 221 are clamped between the bolt head and the second threaded plate 38.

[0066] In some embodiments, when the first end of the diagonal brace 3 is connected to the base frame 1 via a first pin 12 and multiple bolt assemblies, and the end of the diagonal brace 3 is connected to the subframe body 2 via multiple bolt assemblies, the installation accuracy between the diagonal brace 3 and the subframe body 2 is low. The base frame 1 can be fixed to the subframe body 2 first, and then the diagonal brace 3 can be assembled. When the first end of the diagonal brace 3 is connected to the base frame 1 via a first pin 12 and multiple bolt assemblies, and the end of the diagonal brace 3 is connected to the subframe body 2 via a second pin 34 and multiple bolt assemblies, the installation accuracy between the diagonal brace 3 and the subframe body 2 is high. The base frame 1 can be assembled to the subframe body 2 first, and then the diagonal brace 3 can be assembled. The position of the base frame 1 can then be adjusted and fixed by adjusting the first detachable connection structure and the second detachable connection structure.

[0067] Furthermore, as those skilled in the art will understand, bolt assemblies include bolts and nuts, etc., which will not be described in detail here.

[0068] The present invention also provides a pump truck that includes the chassis assembly described in the above embodiments.

[0069] In some embodiments, the pump truck includes a cab, a chassis, and a frame assembly as described above, with a subframe detachably mounted on top of the chassis and the front end of the chassis connected to the cab.

[0070] Specifically, the subframe body 2 and the base frame 1, the subframe body 2 and the diagonal brace 3, the base frame 1 and the diagonal brace 3, and the base frame 1 and the chassis are all detachable connections, so that the pump truck can achieve a modular structure.

[0071] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, and the existence of an infinite number of specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the present invention to other occasions without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A vehicle frame assembly, characterized in that, It includes a subframe and a base frame (1). The subframe includes a subframe body (2) and a diagonal brace (3). The base frame (1) is detachably installed on the top of the front end of the subframe body (2). The two ends of the diagonal brace (3) are detachably connected to the subframe body (2) and the base frame (1), respectively. The base frame (1) has two horizontally spaced first connecting plates (11) on one side facing the diagonal brace (3). The first connecting plates (11) extend along the length of the subframe body (2) in a vertical plane. The diagonal brace (3) includes a support base plate (31) extending in a vertical plane. The support base plate (31) is attached to the outer side of the plate cantilever of the first connecting plate (11). The diagonal brace (3) also includes two support side plates (32) extending along the bottom edge and top edge of the support base plate (31) respectively. The diagonal brace (3) also includes a plurality of support members (33) with U-shaped shapes and spaced apart from each other. The two ends of the support members (33) are respectively connected to the two support side plates (32). The side of the base frame (1) facing away from the diagonal brace (3) is connected to the front end of the subframe body (2) through a first detachable connection structure; The subframe body (2) includes two horizontally spaced longitudinal beams (22), each longitudinal beam (22) including a vertically extending web (221) and two horizontally extending and vertically spaced wing plates (222). The inner side of the web (221) faces the other longitudinal beam (22), and the two wing plates (222) are connected to the inner side of the web (221). The number of the first detachable connection structures is two, and the two first detachable connection structures correspond to the two longitudinal beams (22) respectively. The first detachable connection structure includes a second connecting plate (14) mounted on the base frame (1) and extending vertically, a third connecting plate (15) mounted on the base frame (1) and extending horizontally, a first pad plate (35), and a first threaded plate (36); the second connecting plate (14) is attached to the outer side of the web plate (221); along the direction from the outer side to the inner side of the web plate (221), the first pad plate (35), the second connecting plate (14), the web plate (221), and the first threaded plate (36) are distributed in sequence and connected by a plurality of bolts; the third connecting plate (15) is attached to the top surface of the upper wing plate (222), and the third connecting plate (15) is connected to the upper wing plate (222) by a plurality of bolt assemblies.

2. The frame assembly according to claim 1, characterized in that, The number of the diagonal braces (3) is two, the two diagonal braces (3) are horizontally spaced apart, and the first ends of the two diagonal braces (3) are respectively detachably assembled with the two first connecting plates (11).

3. The frame assembly according to claim 2, characterized in that, The first connecting plate (11) includes a plate connecting part and a plate cantilever part that are connected to each other along its length direction. The plate connecting part is fixedly connected to the base frame (1), and the plate cantilever part extends toward the diagonal brace (3). The supporting base plate (31) is connected to the plate cantilever part of the first connecting plate (11) by a plurality of bolt assemblies. Alternatively, the supporting base plate (31) is connected to the plate cantilever part of the first connecting plate (11) by a first pin (12) and a plurality of bolt assemblies.

4. The frame assembly according to claim 3, characterized in that, The supporting side plate (32) is detachably connected to the base frame (1) via an anti-torsion reinforcing plate (13).

5. The frame assembly according to any one of claims 1-4, characterized in that, The top of the subframe body (2) is equipped with two horizontally spaced mounting plates (21), and the ends of the two diagonal braces (3) are detachably assembled with the two mounting plates (21).

6. The frame assembly according to claim 5, characterized in that, The two mounting plates (21) are respectively installed on the top of the two frame longitudinal beams (22); relative to the inward side of the frame longitudinal beams (22), the mounting plates (21) are closer to the outward side of the frame longitudinal beams (22); the mounting plates (21) extend along the length direction of the subframe body (2) in the vertical plane, and the diagonal brace (3) includes a vertically extending support base plate (31), which is attached to the outer side of the mounting plates (21); The supporting base plate (31) and the mounting plate (21) are connected by a plurality of bolt assemblies; or the supporting base plate (31) and the mounting plate (21) are connected by a second pin (34) and a plurality of bolt assemblies.

7. The frame assembly according to claim 6, characterized in that, The side of the underframe (1) facing the diagonal brace (3) is connected to the subframe via a second detachable connection structure.

8. The frame assembly according to claim 7, characterized in that, The frame longitudinal beam (22) includes a vertically extending web (221) and two horizontally extending and vertically spaced wing plates (222). The inner side of the web (221) faces the other frame longitudinal beam (22), and the two wing plates (222) are connected to the inner side of the web (221). There are two second detachable connection structures, and the two second detachable connection structures correspond to the two frame longitudinal beams (22) respectively. The second detachable connection structure includes a fourth connecting plate (16) mounted on the base frame (1) and extending vertically, a fifth connecting plate (17) mounted on the base frame (1) and extending horizontally, a second pad plate (37), and a second threaded plate (38); the fourth connecting plate (16) is attached to the outer side of the web plate (221); along the direction from the outer side to the inner side of the web plate (221), the second pad plate (37), the fourth connecting plate (16), the web plate (221), and the second threaded plate (38) are distributed in sequence and connected by a plurality of bolts; the fifth connecting plate (17) is attached to the top surface of the upper wing plate (222), and the fifth connecting plate (17) is connected to the upper wing plate (222) by a plurality of bolt assemblies.

9. A pump truck, characterized in that, The frame assembly includes any one of claims 1-8.

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