Frame assembly and engineering machinery

Abstract

The utility model provides a frame assembly and engineering machinery, the frame assembly comprises an auxiliary frame and an underframe, the auxiliary frame comprises an auxiliary frame body and a diagonal bracing device, the underframe is fixedly connected with the auxiliary frame body, the diagonal bracing device comprises a connecting rod assembly and a supporting assembly, the connecting rod assembly comprises a first connecting rod and a second connecting rod, and the supporting assembly comprises a second connecting rod and a third connecting rod. One end of the first connecting rod is hinged to the underframe, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is hinged to the auxiliary frame body, and one end of the supporting assembly is connected with the connecting rod assembly so as to support the connecting rod assembly. According to the frame assembly and the engineering machinery, the first connecting rod and the second connecting rod can rotate around the hinge point to be adjusted to the position where the first connecting rod and the second connecting rod are connected with the underframe and the auxiliary frame body in a matched mode, and the distance between one end of the first connecting rod and the other end of the second connecting rod is adjusted. And the length change caused by manufacturing errors of the base and the auxiliary frame body can be adapted, so that the assembly difficulty is reduced, the assembly efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a frame assembly and engineering machinery. Background Art

[0002] The pump truck includes a subframe and a chassis. The subframe is used to support and fix the chassis, pumping system, etc., and connect the upper part (legs and arms) with the chassis. The subframe includes a subframe body and a diagonal brace. The diagonal brace is connected to the longitudinal beam of the subframe body to form the subframe as a whole. The chassis is connected to the longitudinal beam of the subframe body. The subframe body, diagonal brace and chassis form a stable truss structure. Therefore, the diagonal brace plays an important role in improving the strength and stability of the subframe. When the pump truck is in driving state, the diagonal brace is under pressure; when the pump truck is in working state, the diagonal brace is under tension.

[0003] In traditional pump trucks, the chassis, diagonal brace and subframe are fixed by welding, which produces a lot of smoke and dust, and the parts involved in welding need to be partially repainted after the vehicle is off the assembly line. The existing production process cannot achieve green manufacturing. Moreover, it is also very difficult to separate the subframe from the chassis after the chassis is welded to the subframe. When one of the parts of the chassis or subframe is damaged, it needs to be replaced as a whole, which has a high maintenance cost and is not conducive to later maintenance and remanufacturing.

[0004] In order to solve the problems existing in the above-mentioned conventional pump trucks, an invention application with publication number CN117601967A discloses a frame assembly and a pump truck, such as Figure 1 As shown, the chassis 1, the diagonal brace 2 and the sub-frame 3 are fixedly connected by an assembly method, which reduces air pollution in the assembly workshop. However, the diagonal brace 2 is fixedly connected to the chassis 1 and the sub-frame 2 by a large number of bolts, resulting in the connection holes of the chassis 1, the diagonal brace 2 and the sub-frame 3 requiring high manufacturing precision to be assembled smoothly, which is difficult to assemble, has low assembly efficiency and high manufacturing cost. Utility Model Content

[0005] The utility model aims to provide a frame assembly and engineering machinery to solve the problems of great assembly difficulty, low assembly efficiency and high manufacturing cost.

[0006] The utility model provides a frame assembly, comprising a sub-frame and a bottom frame, the sub-frame comprising a sub-frame body and a diagonal bracing device, the bottom frame is fixedly connected to the sub-frame body, the diagonal bracing device comprises a connecting rod assembly and a supporting assembly, the connecting rod assembly comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is hinged to the bottom frame, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is hinged to the sub-frame body, and one end of the supporting assembly is connected to the connecting rod assembly to support the connecting rod assembly.

[0007] In an embodiment of the present invention, the length direction of the first connecting rod intersects with the length direction of the second connecting rod and forms an angle, and the angle value of the angle is preferably 150° to 180°.

[0008] In an embodiment of the utility model, the support assembly includes an adjustment assembly, one end of the adjustment assembly is hinged to the connecting rod assembly, the other end of the adjustment assembly is hinged to the sub-frame body, and the length of the adjustment assembly is adjustable.

[0009] In one embodiment of the utility model, one end of the first link is hinged to the base frame at a first hinge point, the other end of the first link is hinged to one end of the second link at a second hinge point, the other end of the second link is hinged to the sub-frame body at a third hinge point, the sum of the length of the first link and the length of the second link is greater than the straight-line distance between the first hinge point and the third hinge point, one end of the adjustment component is hinged to the first link and the second link at the second hinge point, and the other end of the adjustment component is hinged to the sub-frame body and has a fourth hinge point.

[0010] In one embodiment of the utility model, the support assembly includes an adjustment assembly, a third link and a fourth link, one end of the third link is hinged to the base frame, the other end of the third link is hinged to one end of the fourth link, the other end of the fourth link is hinged to the sub-frame body, one end of the adjustment assembly is hinged to the link assembly, the other end of the adjustment assembly is hinged to the third link, or is hinged to the fourth link or the hinge point between the third link and the fourth link, and the length of the adjustment assembly is adjustable.

[0011] In one embodiment of the utility model, one end of the first link and one end of the third link are both hinged to the base frame and have the first hinge point, the other end of the second link and one end of the fourth link are both hinged to the sub-frame body and have the third hinge point, the other end of the third link is hinged to the other end of the fourth link and have a fourth hinge point, one end of the adjustment component is hinged to the first link and the second link at the second hinge point, and the other end of the adjustment component is hinged to the third link and the fourth link at the fourth hinge point.

[0012] In one embodiment of the utility model, the adjustment assembly includes a threaded sleeve, a first threaded rod and a second threaded rod, one end of the threaded sleeve is connected to one end of the first threaded rod by threaded cooperation, the other end of the first threaded rod is hinged to the sub-frame body at the fourth hinge point, the other end of the threaded sleeve is connected to one end of the second threaded rod by threaded cooperation, the other end of the second threaded rod is hinged to the connecting rod assembly at the second hinge point, when the threaded sleeve rotates along its own axis, the first threaded rod and the second threaded rod can move in the direction of the threaded sleeve's own axis to approach or move away from each other.

[0013] In an embodiment of the present invention, the external threads of the first threaded rod and the external threads of the second threaded rod are in opposite directions.

[0014] In one embodiment of the utility model, the base frame includes a structural member, a first ear seat and a fixing plate, the first ear seat and the fixing plate are both fixedly connected to the structural member, the sub-frame body includes a second ear seat, a third ear seat and a frame, the second ear seat and the third ear seat are both fixedly connected to the frame, the first end of the connecting rod assembly is hinged to the first ear seat, the second end of the connecting rod assembly is hinged to the third ear seat, the other end of the support assembly is hinged to the second ear seat, and the fixing plate is fixedly connected to the frame.

[0015] The utility model also provides an engineering machine, comprising the frame assembly as described above.

[0016] In the frame assembly and engineering machinery of the utility model, the first link and the second link are hingedly connected, and the support assembly supports the link assembly. The first link and the second link can be rotated around the hinge point to adjust to a position for matching and connecting with the base frame and the sub-frame body. The distance between one end of the first link and the other end of the second link is adjusted. During installation and connection, the length change of the base and the sub-frame body caused by manufacturing errors can be adapted, thereby reducing the difficulty of assembly, improving the assembly efficiency, and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a structural schematic diagram of a vehicle frame assembly structure.

[0018] Figure 2 It is a structural schematic diagram of the frame assembly of the first embodiment of the utility model.

[0019] Figure 3 for Figure 2 A schematic structural diagram of the diagonal bracing device of the frame assembly shown.

[0020] Figure 4 for Figure 3A schematic structural diagram of the adjustment assembly of the diagonal bracing device shown.

[0021] Figure 5 for Figure 3 An exploded schematic diagram of the adjustment assembly of the diagonal bracing device shown.

[0022] Figure 6 for Figure 2 A schematic structural diagram of the chassis of the vehicle frame assembly from a first perspective is shown.

[0023] Figure 7 for Figure 2 A second perspective structural schematic diagram of the chassis of the frame assembly is shown.

[0024] Figure 8 for Figure 2 A schematic structural diagram of the subframe body of the frame assembly shown.

[0025] Fig. 9 It is a structural schematic diagram of a frame assembly of a second embodiment of the utility model.

[0026] Fig.10 for Fig. 9 A schematic structural diagram of the diagonal bracing device of the frame assembly shown. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] First embodiment

[0029] The utility model provides a frame assembly, such as Figure 2 As shown, a frame assembly of an embodiment includes a subframe 10 and a bottom frame 20, the subframe 10 includes a subframe body 11 and a diagonal brace device 12, the bottom frame 20 is fixedly connected to the subframe body 11, the diagonal brace device 12 includes a connecting rod assembly and a supporting assembly, the connecting rod assembly includes a first connecting rod 121 and a second connecting rod 122, one end of the first connecting rod 121 is hinged to the bottom frame 20, the other end of the first connecting rod 121 is hinged to one end of the second connecting rod 122, the other end of the second connecting rod 122 is hinged to the subframe body 11, and one end of the supporting assembly is connected to the connecting rod assembly to support the connecting rod assembly.

[0030] In the frame assembly and engineering machinery of the utility model, the first link 121 and the second link 122 are hingedly connected, and the support assembly supports the link assembly. The first link 121 and the second link 122 can be rotated around the hinge point to adjust to a position for matching and connecting with the base frame 20 and the sub-frame body 11, and the distance between one end of the first link 121 and the other end of the second link 122 (the two ends of the first link 121 and the second link 122 that are far away from each other) is adjusted. During installation and connection, the length change of the base 20 and the sub-frame body 11 caused by manufacturing errors can be adapted, thereby reducing assembly difficulty, improving assembly efficiency, and reducing production costs.

[0031] In this embodiment, Figure 3 As shown, the support assembly includes an adjustment assembly 123, one end of the adjustment assembly 123 is hinged to the connecting rod assembly, and the other end of the adjustment assembly 123 is hinged to the sub-frame body 11, and the length of the adjustment assembly 123 is adjustable.

[0032] Specifically, one end of the first link 121 is hinged to the chassis 20 at the first hinge point A, the other end of the first link 121 is hinged to one end of the second link 122 at the second hinge point B, the other end of the second link 122 is hinged to the sub-frame body 11 at the third hinge point D, and the sum of the length of the first link 121 and the length of the second link 122 is greater than the straight-line distance between the first hinge point A and the third hinge point D. One end of the adjustment component 123 is hinged to the first link 121 and the second link 122 at the second hinge point B, the other end of the adjustment component 123 is hinged to the sub-frame body 11 and has a fourth hinge point C, and the adjustment component 123 can telescopically adjust its own length to adjust the distance between the two ends, that is, adjust the connecting line distance L between the second hinge point B and the fourth hinge point C. BC The adjusting component 123 plays a role in supporting the first connecting rod 121 and the second connecting rod 122 during the installation and connection process. When the first connecting rod 121 and the second connecting rod 122 are connected, one end of the adjusting component 123 is hinged to the first connecting rod 121 and the second connecting rod 122 at the second hinge point B to complete the connection, and the adjusting component 123 adjusts its own length so that the other end can be connected to the sub-frame body 11.

[0033] The length direction of the first connecting rod 121 intersects with the length direction of the second connecting rod 122 and forms an angle, that is, the length L of the first connecting rod 121 is AB The length L of the second connecting rod 122 BD The sum is greater than the straight line distance L between the first hinge point A and the third hinge point D AD, at this time, there is an angle between the length direction of the first connecting rod 121 and the length direction of the second connecting rod 122, and the angle is an obtuse angle, and the angle value of the angle is preferably 150° to 180°. The hinge is realized by setting a pin at the first hinge point A, the second hinge point B and the third hinge point D, and the sub-frame body 11, the first connecting rod 121, the second connecting rod 122 and the bottom frame 20 are all provided with a pin hole that is connected with the pin. In the process of installing and connecting the diagonal bracing device 12 with the sub-frame body 11 and the bottom frame 20, the angle between the first connecting rod 121 and the second connecting rod 122 is adjusted, and the position of the pin hole on one end of the first connecting rod 121 can be adjusted to align with the pin hole on the bottom frame 20, and the position of the pin hole on the other end of the second connecting rod 122 can be adjusted to align with the pin hole on the sub-frame body 11, and then the first connecting rod 121 and the second connecting rod 122 are connected to the bottom frame 20 and the sub-frame body 11 respectively by setting a pin. One end of the adjustment component 123 has been connected, and the other end will be connected to the sub-frame body 11 at the fourth hinge point C to support the first link 121 and the second link 122. At this time, the position between the second hinge point B and the fourth hinge point C is determined, and the length of the adjustment component 123 is adjusted so that the other end is hinged to the sub-frame body 11 at the fourth hinge point C.

[0034] It can be understood that the distance L between the second hinge point B and the fourth hinge point C is BC is variable, and the length of the adjustment component 123 is L BC . Specifically, in the diagonal bracing device 12, the first link 121, the second link 122 and the adjustment assembly 123 are hingedly connected to each other and form a second hinge point B, and the second hinge point B is movable relative to the third hinge point C. During the installation and connection process of the diagonal bracing device 12 with the base frame 20 and the sub-frame body 11, the first link 121 is hinged to the base frame 20 at the first hinge point A or the second link 122 is hinged to the sub-frame body 11 at the third hinge point D, and one end of the adjustment assembly 123 is hinged to the sub-frame body 11 at the fourth hinge point C. At this time, the diagonal bracing device 12 needs to complete the final connection at the third hinge point D or the first hinge point A, and the length L of the adjustment assembly 123 is adjusted. BC By adjusting the distance between the two relatively distant ends of the first link 121 and the second link 122, the first link 121 is aligned with the pin hole on the bottom frame 20 or the second link 122 is aligned with the pin hole on the sub-frame body 11, the assembly error of the first link 121 and the second link 122 during installation and connection can be reduced, and the manufacturing accuracy of the diagonal bracing device 12, the bottom frame 20 and the sub-frame body 11 can be reduced, thereby reducing the manufacturing cost and improving the assembly efficiency.

[0035] It should be noted that the length of the first connecting rod 121 is L AB , the length of the second connecting rod 122 is LBD , the theoretical distance between the first hinge point A and the third hinge point D is L AD , the distance between one end of the first connecting rod 121 and the other end of the second connecting rod 122 is equal to L AD When the first link 121 and the second link 122 can be smoothly connected to the bottom frame 20 and the sub-frame body 11.

[0036] It should be noted that the first connecting rod 121, the second connecting rod 122, the adjustment assembly 123, the chassis 20 and the sub-frame body 11, which are hinged at the first hinge point A, the second hinge point B, the third hinge point D and the fourth hinge point C, are correspondingly provided with pin holes. For the convenience of description and understanding, the pin holes located at the first hinge point A, the second hinge point B, the third hinge point D and the fourth hinge point C are defined as the pin hole A, the pin hole B, the pin hole D and the pin hole C, respectively, that is, the first connecting rod 121 is provided with the pin hole A and the pin hole B, the second connecting rod 122 is provided with the pin hole B and the pin hole D, the adjustment assembly 123 is provided with the pin hole B and the pin hole C, the sub-frame body 11 is provided with the pin hole D, and the chassis 20 is provided with the pin hole A.

[0037] In this embodiment, Figure 4-5 As shown, the adjustment assembly 123 includes a threaded sleeve 1231, a first threaded rod 1232 and a second threaded rod 1233, one end of the threaded sleeve 1231 is connected to one end of the first threaded rod 1232 by threaded matching, the other end of the first threaded rod 1232 is hinged to the sub-frame body 11 at a fourth hinge point, the other end of the threaded sleeve 1231 is connected to one end of the second threaded rod 1233 by threaded matching, the other end of the second threaded rod 1233 is hinged to the connecting rod assembly at a second hinge point, when the threaded sleeve 1231 rotates along its own axis, the first threaded rod 1232 and the second threaded rod 1233 can move in the direction of the threaded sleeve 1231's own axis to approach or move away from each other. Wherein, both ends of the threaded sleeve 1231 have internal threads, one end of the first threaded rod 1232 and the other end of the second threaded rod 1222 both have external threads, and the external threads of the first threaded rod 1232 and the external threads of the second threaded rod 1233 are in opposite directions.

[0038] Specifically, the adjustment assembly 123 also includes two locking nuts 1234. The first threaded rod 1232 can be a left-handed threaded rod, and the second threaded rod 1233 can be a right-handed threaded rod. One end of the threaded sleeve 1231 has a left-handed threaded hole, which is connected to the left-handed threaded rod; the other end of the threaded sleeve 1231 has a right-handed threaded hole, which is connected to the right-handed threaded rod. A hinge hole is provided at one end of the first threaded rod 1232 hinged to the first connecting rod 121 and the second connecting rod 122, and a hinge hole is provided at one end of the second threaded rod 1233 hinged to the sub-frame body 11. When the rotational freedom of the first threaded rod 1232 and the second threaded rod 1233 is fixed, and the threaded sleeve 1231 is rotated clockwise or counterclockwise (forward and reverse), the first threaded rod 1232 and the second threaded rod 1233 can be extended or contracted synchronously, that is, approach or move away from each other, so as to adjust the length L of the adjustment assembly 123. BC This adjustment method has a simple overall structure and low cost. At the same time, the length L can be achieved by simply rotating the threaded sleeve 1234. BC The adjustment is simple and quick to operate. The threaded sleeve 1231 can be set to a polygonal structure, such as a hexagonal structure, which is convenient for wrench operation. Length L BC After adjustment, tighten the locking nut 1234 to increase the strength of the threaded connection.

[0039] It can be understood that the first threaded rod 1232 can also be a right-handed threaded rod, and the second threaded rod 1233 can also be a left-handed threaded rod. In this case, one end threadedly connected to the first threaded rod 1232 has a right-handed threaded hole, and the other end threadedly connected to the second threaded rod 1233 has a left-handed threaded hole.

[0040] In this embodiment, the first connecting rod 121, the second connecting rod 122 and the adjustment assembly 123 are connected together through the pin holes by a pin. When the three pin holes (A, B, C or B, C, D) of the diagonal support device 12 are fixed by the pins, the rotational freedom of the first threaded rod 1232 and the second threaded rod 1233 can be constrained. At this time, the length L can be achieved by rotating the threaded sleeve 1231 clockwise or counterclockwise. BC The diagonal bracing device 12 is connected to the base frame 20 by means of pins through the pin holes A, B, C and D, and the structure after the above connection is a stable statically determinate structure.

[0041] In order to achieve the length L BCIn another preferred embodiment, the adjustment component 123 includes a screw, a first sleeve and a second sleeve, both ends of the screw have external threads, one end of the first sleeve and one end of the second sleeve have internal threads that can be threadedly connected to the two ends of the screw. The other end of the first sleeve is hinged to the sub-frame body 11 at the fourth hinge point, and the other end of the second sleeve is hinged to the first connecting rod 121 and the second connecting rod 122 at the second hinge point. Specifically, one end of the screw has a left-handed thread, and the other end has a right-handed thread. One end of the first sleeve has a left-handed threaded hole that cooperates with one end of the screw, and one end of the second sleeve has a right-handed threaded hole that cooperates with the other end of the screw. When the rotational freedom of the first sleeve and the second sleeve is fixed and the screw is rotated clockwise or counterclockwise (forward and reverse), the first sleeve and the second sleeve extend or contract synchronously, that is, they move closer to or away from each other to achieve a length L BC adjustments.

[0042] In this embodiment, Figure 6-7 As shown, the chassis 20 includes a structural member 21, a first ear seat 22 and a fixing plate 23. The first ear seat 22 and the fixing plate 23 are both fixedly connected to the structural member 21. The first connecting rod 121 is hinged to the first ear seat 22. The fixing plate 23 is fixedly connected to the sub-frame body 11.

[0043] Specifically, there are two first ear seats 22 and they are symmetrically mounted on the structural member 21, and there are multiple fixing plates 23 and they are symmetrically mounted on the structural member 21. The structural member 21, the first ear seats 22 and the fixing plates 23 are fixedly connected by welding. The first ear seats 22 are provided with a pin hole A, and the fixing plates 23 are provided with a plurality of threaded holes 231. Fasteners such as bolts or screws are placed in the threaded holes 231 to achieve a fixed connection between the chassis 20 and the sub-frame body 11.

[0044] In this embodiment, Figure 8 As shown, the sub-frame body 11 includes a second ear seat 111, a third ear seat 112 and a frame 113. The second ear seat 111 and the third ear seat 112 are both fixedly connected to the frame 113. The other end of the adjustment assembly 123 is hinged to the second ear seat 111. The other end of the second connecting rod 122 is hinged to the third ear seat 112. The fixing plate 23 is fixedly connected to the frame 113.

[0045] Specifically, the frame 113 includes two longitudinal beams arranged in parallel with each other, and a plurality of transverse beams, each transverse beam is located between the two longitudinal beams, and the two ends of each transverse beam are respectively fixedly connected to the two longitudinal beams. The second ear seat 111 has two longitudinal beams respectively fixedly mounted on the frame 113, and the third ear seat 112 has two longitudinal beams respectively fixedly mounted on the frame 113. A pin shaft hole C is provided on the second ear seat 111, and a pin shaft hole D is provided on the third ear seat 112.

[0046] In this embodiment, the first connecting rod 121, the second connecting rod 122 and the adjustment assembly 123 in the diagonal bracing device 12 are two force rods, which bear tension or pressure and have a simple structure. The first connecting rod 121 is provided with a pin hole A and a pin hole B at both ends, and the pin hole A on the first connecting rod 121 matches with the pin hole A on the first ear seat 22. The second connecting rod 122 is provided with a pin hole B and a pin hole D at both ends, and the pin hole D on the second connecting rod 122 matches with the pin hole D on the third ear seat 112.

[0047] In another preferred embodiment, there are two diagonal bracing devices 12, and the two diagonal bracing devices 12 are parallel and spaced apart.

[0048] The utility model also provides an engineering machine, comprising the frame assembly as described above. Specifically, the engineering machine can be a concrete pump truck, a mixer truck, a truck crane, etc.

[0049] The assembly method of the vehicle frame assembly of this embodiment includes the following two methods:

[0050] Assembly method 1: During assembly, first, the bottom frame 20 is fixedly connected to the sub-frame body 11 by bolts. At this time, the distance between the pin hole A on the first ear seat 22 and the pin hole D on the third ear seat 112 can be determined; the first connecting rod 121, the second connecting rod 122 and the adjustment assembly 123 of the diagonal bracing device 12 are connected to each other as a whole; then, the diagonal bracing device 12 is respectively connected to the pin hole A on the first ear seat 22 (or the pin hole D on the third ear seat 112) by pins; and then the length L of the adjustment assembly 123 is adjusted. BC After aligning the pin hole D on the second connecting rod 122 (or the pin hole A on the first connecting rod 121) with the pin hole D on the third ear seat 112 (or the pin hole A on the first ear seat 22), the second connecting rod 122 (or the first connecting rod 121) is fixed to the sub-frame body 11 (or the bottom frame 20) with a pin.

[0051] Assembly method 2: During assembly, first fix the base frame 20 and the sub-frame body 11 with bolts, at this time, the distance between the pin hole A on the first ear seat 22 and the pin hole D on the third ear seat 112 can be determined; one end of the first connecting rod 121 is hinged to the first ear seat 22, and one end of the second connecting rod 122 is hinged to the third ear seat 112; then adjust the length of the adjustment component 123, connect one end of the adjustment component 123 to the first connecting rod 121 and the second connecting rod 122 at the second hinge point B, and the other end of the adjustment component 123 is connected to the second ear seat 111 through a pin.

[0052] The working principle of the frame assembly of this embodiment is as follows:

[0053] According to the manufacturing and assembly accuracy of the chassis 20 and the subframe 10, the variation range of the pin hole A and the pin hole D can be calculated. AD Theoretically, when L AB +L BD -L AD >Δ AD When the diagonal brace device 12 is used, it can adapt to the length changes of the pin shaft holes A and D of the base frame 20 and the auxiliary frame body 11 due to manufacturing errors, thereby reducing the manufacturing accuracy requirements of the base frame 20, the diagonal brace device 12 and the auxiliary frame body 11, thereby reducing the manufacturing cost and improving the assembly efficiency.

[0054] The main advantages of the frame assembly of this embodiment are as follows:

[0055] 1. Compared with the traditional pump truck structure, the frame assembly and engineering machinery of the utility model adopts an assembled structure of the underframe 20, the subframe body 11 and the diagonal brace device 12, so that the three are fixed together. The assembled structure can avoid welding when assembling the frame, reduce air pollution in the assembly workshop, and is beneficial to environmental protection.

[0056] 2. The use of the adjustable diagonal bracing device 12 allows the chassis 20, the auxiliary frame body 11 and the diagonal bracing device 12 to be assembled smoothly even under the condition of lower manufacturing precision, which effectively reduces the processing difficulty of parts and reduces the manufacturing cost.

[0057] 3. The diagonal bracing device 12 is assembled by pin shaft. Theoretically, when L AB +L BD -L AD >Δ AD When the diagonal bracing device 12 is assembled, it can adapt to the length changes of the pin shaft holes A and D of the chassis 20 and the auxiliary frame body 11 due to manufacturing errors, thereby reducing the difficulty of assembly and improving the assembly efficiency.

[0058] 4. The diagonal bracing device 12 is composed of three two-force rods (a first connecting rod 121, a second connecting rod 122 and an adjusting assembly 123), has a simple structure and is easy to manufacture.

[0059] 5. The adjustment component 123 is mainly used to adjust the length L BC When implemented, a larger angle is formed between the first connecting rod 121 and the second connecting rod 122, and the angle is an obtuse angle, and the force on the adjustment component 123 is very small relative to the first connecting rod 121 and the second connecting rod 122.

[0060] 6. Compared with the prior art, a single diagonal brace is divided into two (a first connecting rod 121 and a second connecting rod 122), the compression rod stability of the diagonal brace device 12 is enhanced, the first connecting rod 121 and the second connecting rod 122 can be designed to be lightweight, and the length and weight of the first connecting rod 121 and the second connecting rod 122 are reduced, which is convenient for handling, storage and assembly in the workshop.

[0061] 7. Compared with the prior art, the diagonal bracing device 12 is more reliable with a pin connection than with a bolt connection. Bolt connection requires anti-loosening measures, and in actual use, it is necessary to regularly check whether the bolts are loose, which is not conducive to product maintenance and protection; and the diagonal bracing device 12 transmits force through friction, which requires an effective friction surface. The diagonal bracing device 12 is exposed to the outside, and the friction surface is easily affected by the external environment and fails, resulting in failure of the diagonal bracing device 12. The pin connection can achieve zero-gap connection, making the connection more compact and firmer, and can effectively prevent loosening and falling off; the pin connection can withstand greater loads and has better bearing capacity, and is suitable for occasions that need to withstand greater forces; the installation and disassembly of the pin connection is more convenient and faster than the bolt connection; the pin connection can reduce the weight of the connecting parts, which is conducive to reducing the weight of the overall equipment and improving the transportation and operation efficiency of the equipment.

[0062] Second embodiment

[0063] The structure of the frame assembly of this embodiment is similar to that of the frame assembly of the first embodiment, except for the diagonal bracing device 12 .

[0064] In this embodiment, Figure 9-10 As shown, the frame assembly includes a sub-frame 10 and a chassis 20. The sub-frame 10 includes a sub-frame body 11 and a diagonal brace device 12. The chassis 20 is fixedly connected to the sub-frame body 11. The diagonal brace device 12 includes a connecting rod assembly and a supporting assembly. The connecting rod assembly includes a first connecting rod 121 and a second connecting rod 122. One end of the first connecting rod 121 is hinged to the chassis 20, the other end of the first connecting rod 121 is hinged to one end of the second connecting rod 122, and the other end of the second connecting rod 122 is hinged to the sub-frame body 11. One end of the supporting assembly is connected to the connecting rod assembly to support the connecting rod assembly. One end of the first connecting rod 121 is hinged to the chassis 20 and has a first hinge point A. The other end of the first connecting rod 121 is hinged to one end of the second connecting rod 122 and has a second hinge point B. The other end of the second connecting rod 122 is hinged to the sub-frame body 11 and has a third hinge point D. Among them, the length L of the first connecting rod 121 AB The length L of the second connecting rod 122 BD The sum is greater than the straight line distance L between the first hinge point A and the third hinge point D AD Specifically, the hinge is realized by setting pins at the first hinge point A, the second hinge point B and the third hinge point D.

[0065] Specifically, the support assembly includes an adjustment assembly 123, a third link 124 and a fourth link 125. One end of the first link 121 and one end of the third link 124 are both hinged to the chassis 20 and have a first hinge point A. The other end of the second link 122 and one end of the fourth link 125 are both hinged to the sub-frame body 11 and have a third hinge point D. The other end of the third link 124 and the other end of the fourth link 125 are hinged to the fourth hinge point C. One end of the adjustment assembly 123 is hinged to the first link 121 and the second link 122 at the second hinge point B, and the other end of the adjustment assembly 123 is hinged to the third link 124 and the fourth link 125 at the fourth hinge point C. Of course, the other end of the adjustment assembly 123 can also be hinged to the third link 124 between the first hinge point A and the fourth hinge point C, or hinged to the fourth link 125 between the third hinge point D and the fourth hinge point C. The adjustment component 123 can be extended to change its length, thereby adjusting the distance between the two ends of the adjustment component 123, that is, the distance L between the second hinge point B and the fourth hinge point C. BC The adjusting assembly 123 , the third connecting rod 124 and the fourth connecting rod 125 all play a supporting role on the first connecting rod 121 and the second connecting rod 122 .

[0066] In this embodiment, the first connecting rod 121, the adjusting assembly 123 and the second connecting rod 122 are connected together by a pin through the pin hole B; the third connecting rod 124, the adjusting assembly 123 and the fourth connecting rod 125 are connected together by a pin through the pin hole D. By adjusting the length L of the adjusting assembly 123 BC , adjust the length L of the diagonal bracing device 12 AD , that is, the length variation of the pin hole A and the pin hole D of the chassis 20 and the sub-frame body 11 due to manufacturing error can be adapted. Compared with the diagonal bracing device 12 in the first embodiment, the diagonal bracing device 12 in this embodiment is an integral structure, that is, in the process of connecting and assembling with the chassis 20 and the sub-frame body 11, it is regarded as an integral structure connected with the chassis 20 and the sub-frame body 11; the diagonal bracing device 12 in this embodiment has one more set of connecting rods (third connecting rod 124 and fourth connecting rod 125) than the diagonal bracing device 12 in the first embodiment, and has higher strength and stability.

[0067] In this embodiment, the diagonal bracing device 12 further includes a third connecting rod 124 and a fourth connecting rod 125, and the weight is slightly increased. The diagonal bracing device 12 can be assembled into an integral structure by means of a pin shaft. When assembling the engineering machinery, the pin shaft hole A (or pin shaft hole D) at one end of the diagonal bracing device 12 is first connected to the chassis 20 (or the sub-frame body 11), and then the length L of the adjustment component 123 is adjusted. BC , the length L between the pin hole A and the pin hole D of the sub-frame body 11 and the bottom frame 20 is adapted ADThen, the pin hole D (or the pin hole A) at the other end of the diagonal bracing device 12 is fixed to the sub-frame body 11 (or the bottom frame 20).

[0068] In this document, unless otherwise specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0069] In this document, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of the technical solution and the convenience of description. Therefore, they should not be understood as limitations on the present invention.

[0070] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0071] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A vehicle frame assembly, characterized in that: The invention comprises a sub-frame (10) and a bottom frame (20), wherein the sub-frame (10) comprises a sub-frame body (11) and a diagonal bracing device (12), wherein the bottom frame (20) is fixedly connected to the sub-frame body (11), and the diagonal bracing device (12) comprises a connecting rod assembly and a supporting assembly, wherein the connecting rod assembly comprises a first connecting rod (121) and a second connecting rod (122), wherein one end of the first connecting rod (121) is hinged to the bottom frame (20), and the other end of the first connecting rod (121) is hinged to one end of the second connecting rod (122), and the other end of the second connecting rod (122) is hinged to the sub-frame body (11), and one end of the supporting assembly is connected to the connecting rod assembly to support the connecting rod assembly.

2. The frame assembly according to claim 1, characterized in that: The length direction of the first connecting rod (121) intersects with the length direction of the second connecting rod (122) and forms an angle, and the angle value of the angle is 150° to 180°.

3. The frame assembly according to claim 1, characterized in that: The support assembly comprises an adjustment assembly (123), one end of the adjustment assembly (123) is hinged to the connecting rod assembly, the other end of the adjustment assembly (123) is hinged to the sub-frame body (11), and the length of the adjustment assembly (123) is adjustable.

4. The vehicle frame assembly according to claim 3, characterized in that: One end of the first link (121) is hinged to the base frame (20) at a first hinge point, the other end of the first link (121) is hinged to one end of the second link (122) at a second hinge point, the other end of the second link (122) is hinged to the sub-frame body (11) at a third hinge point, the sum of the length of the first link (121) and the length of the second link (122) is greater than the straight-line distance between the first hinge point and the third hinge point, one end of the adjustment component (123) is hinged to the first link (121) and the second link (122) at the second hinge point, the other end of the adjustment component (123) is hinged to the sub-frame body (11) and has a fourth hinge point.

5. The vehicle frame assembly according to claim 1, characterized in that: The support assembly comprises an adjustment assembly (123), a third connecting rod (124) and a fourth connecting rod (125); one end of the third connecting rod (124) is hinged to the base frame (20); the other end of the third connecting rod (124) is hinged to one end of the fourth connecting rod (125); the other end of the fourth connecting rod (125) is hinged to the sub-frame body (11); one end of the adjustment assembly (123) is hinged to the connecting rod assembly; the other end of the adjustment assembly (123) is hinged to the third connecting rod (124), or is hinged to the fourth connecting rod (125), or is hinged to the hinge point between the third connecting rod (124) and the fourth connecting rod (125); the length of the adjustment assembly (123) is adjustable.

6. The vehicle frame assembly according to claim 5, characterized in that: One end of the first link (121) and one end of the third link (124) are both hinged to the base frame (20) and have a first hinge point, the other end of the second link (122) and one end of the fourth link (125) are both hinged to the sub-frame body (11) and have a third hinge point, the other end of the third link (124) and the other end of the fourth link (125) are hinged to the fourth hinge point, one end of the adjustment component (123) is hinged to the first link (121) and the second link (122) at the second hinge point, and the other end of the adjustment component (123) is hinged to the third link (124) and the fourth link (125) at the fourth hinge point.

7. The vehicle frame assembly according to claim 4 or 6, characterized in that: The adjustment component (123) includes a threaded sleeve (1231), a first threaded rod (1232) and a second threaded rod (1233); one end of the threaded sleeve (1231) is connected to one end of the first threaded rod (1232) by threaded cooperation; the other end of the first threaded rod (1232) is hinged to the sub-frame body (11) at the fourth hinge point; the other end of the threaded sleeve (1231) is connected to one end of the second threaded rod (1233) by threaded cooperation; the other end of the second threaded rod (1233) is hinged to the adjustment component (123) at the second hinge point; when the threaded sleeve (1231) rotates along its own axis, the first threaded rod (1232) and the second threaded rod (1233) can move in the direction of the threaded sleeve (1231)'s own axis to approach or move away from each other.

8. The vehicle frame assembly according to claim 7, characterized in that: The external threads of the first threaded rod (1232) and the external threads of the second threaded rod (1233) are in opposite directions.

9. The vehicle frame assembly according to claim 1, characterized in that: The chassis (20) comprises a structural member (21), a first ear seat (22) and a fixing plate (23), wherein the first ear seat (22) and the fixing plate (23) are both fixedly connected to the structural member (21), the sub-frame body (11) comprises a second ear seat (111), a third ear seat (112) and a frame (113), wherein the second ear seat (111) and the third ear seat (112) are both fixedly connected to the frame (113), the first end of the connecting rod assembly is hinged to the first ear seat (22), the second end of the connecting rod assembly is hinged to the third ear seat (112), the other end of the supporting assembly is hinged to the second ear seat (111), and the fixing plate (23) is fixedly connected to the frame (113).

10. An engineering machine, characterized in that: It comprises a frame assembly as claimed in any one of claims 1 to 9.

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