Engineering machinery and frame thereof

Abstract

The invention belongs to the technical field of engineering machinery equipment, and particularly relates to an engineering machine and a frame thereof, the engineering machine frame comprises a frame middle section and a frame composition section, and the horizontal plane where the highest point of the frame composition section is located is lower than or flush with the horizontal plane where the highest point of the frame middle section is located. The horizontal plane where the lowest point of the frame composition section is located is higher than the horizontal plane where the lowest point of the frame middle section is located. The engineering machinery frame is a main bearing part of the engineering machinery chassis, and the middle section of the frame is a core bearing part of the engineering machinery chassis. According to the vehicle frame, the horizontal plane where the highest point of the vehicle frame middle section is located is higher than or flush with the horizontal plane where the highest point of the vehicle frame composition section is located; the horizontal plane where the lowest point of the frame middle section is located is lower than the horizontal plane where the lowest point of the frame composition section is located, so that the height of the cross section of the frame middle section is increased relative to the frame composition section, the structural strength of the frame middle section is remarkably improved, and the structural strength of the engineering machinery frame is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of engineering machinery and equipment, and specifically relates to an engineering machine and a frame thereof. Background Art

[0002] The construction machinery frame is the main load-bearing component of the construction machinery chassis. Its structural strength determines the load-bearing capacity of the construction machinery chassis, and further determines the lifting performance and safety performance of the construction machinery. It can be seen that the construction machinery frame needs to have sufficient structural strength to meet the use requirements.

[0003] With the increasing requirements for the lifting performance of construction machinery, ordinary large-tonnage construction machinery is difficult to meet the lifting needs. Therefore, construction machinery needs to develop in the direction of large-scale and ultra-large-scale. In order to meet the development needs of large-scale and ultra-large-scale construction machinery, it is also necessary to improve the structural strength of the construction machinery frame. Summary of the invention

[0004] The purpose of the present application is to provide an engineering machinery and a frame thereof, aiming to improve the structural strength of the engineering machinery frame.

[0005] In order to achieve the above-mentioned purpose, the present application provides, on one hand, a construction machinery frame, comprising:

[0006] A vehicle frame middle section, wherein a lifting component mounting portion and a movable leg mounting portion are provided on the vehicle frame middle section;

[0007] A frame assembly section is connected to the front or rear of the frame middle section, the horizontal plane where the highest point of the frame assembly section is located is lower than or flush with the horizontal plane where the highest point of the frame middle section is located, and the horizontal plane where the lowest point of the frame assembly section is located is higher than the horizontal plane where the lowest point of the frame middle section is located.

[0008] In some embodiments, the top of the mid-frame section and the top of the frame component section are both planar structures, and the top of the mid-frame section and the top of the frame component section are flush.

[0009] In some embodiments, the height difference between the lowest point of the mid-frame section and the lowest point of the frame assembly section is 1 / 2 to 1 / 4 of the height difference between the lowest point and the highest point of the frame assembly section.

[0010] In some embodiments, the engineering machinery frame further includes a frame connecting section connecting the frame middle section and the frame component sections, the lowest point of the frame connecting section and the lowest point of the frame middle section are located in the same horizontal plane, and the highest point of the frame connecting section and the highest point of the frame middle section are located in the same horizontal plane.

[0011] In some embodiments, the middle section of the frame includes a middle section top plate, a middle section bottom plate and a middle section web plate, the frame connecting section includes a connecting section top plate, a connecting section bottom plate and a connecting section web plate, and the frame component sections include a component section top plate, a component section bottom plate and a component section web plate, the connecting section top plate connects the middle section top plate and the component section top plate, the connecting section web plate connects the middle section web plate and the component section web plate located on the same side, the connecting section bottom plate connects the middle section bottom plate and the component section bottom plate, the thicknesses of the middle section top plate, the connecting section top plate and the component section top plate decrease in sequence, the thicknesses of the middle section bottom plate, the connecting section bottom plate and the component section bottom plate decrease in sequence, and the thicknesses of the middle section web plate, the connecting section web plate and the component section web plate decrease in sequence.

[0012] In some embodiments, the lifting component mounting portion includes a plurality of threaded hole groups arranged in a concentric circle form, and each threaded hole group includes a plurality of threaded holes arranged at intervals in the circumferential direction.

[0013] In some embodiments, the number of the threaded hole groups is two and they are respectively a first threaded hole group and a second threaded hole group, the first threaded hole group includes a plurality of first threaded holes arranged at intervals along a first annular direction, the second threaded hole group includes a plurality of second threaded holes arranged at intervals along a second annular direction, and the first threaded holes and the second threaded holes are arranged crosswise.

[0014] In some embodiments, the movable leg mounting portion includes an upper mounting support and a lower mounting support, the upper mounting support is formed with a contact arc surface that movably cooperates with the movable leg, and the lower mounting support is formed with a positioning arc surface that movably cooperates with the movable leg.

[0015] In some embodiments, the end of the frame component section away from the frame middle section is provided with a traction bracket for connecting other functional components.

[0016] On the other hand, the present application further provides an engineering machinery, comprising the engineering machinery frame as described above.

[0017] Through the above technical solution, the engineering machinery and the frame thereof provided by the present application have the following beneficial effects:

[0018] The construction machinery frame is composed of a frame middle section and a frame assembly section, wherein a lifting component mounting portion is formed on the frame middle section, and the load of the lifting component will be transferred to the frame middle section, and the frame assembly section is connected to the frame middle section, and the frame assembly section will transfer the load it receives to the frame middle section. In other words, the frame middle section is the core load-bearing part. It can be seen that improving the structural strength of the frame middle section can effectively improve the structural strength of the construction machinery frame. In the present application, the structural strength of the frame middle section is increased by increasing the cross-sectional height of the frame middle section, thereby improving the structural strength of the construction machinery frame, and then improving the lifting performance of the construction machinery.

[0019] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0021] Figure 1 It is a front view of the construction machinery frame in a specific embodiment of the present application;

[0022] Figure 2 A top view of an engineering machinery frame in a specific embodiment of the present application;

[0023] Figure 3 This is a structural schematic diagram of the middle section of the frame in a specific embodiment of the present application;

[0024] Figure 4 It is a structural schematic diagram of the lower mounting support in a specific embodiment of the present application.

[0025] Description of Reference Numerals

[0026] 100. Construction machinery frame; 1. Middle section of frame; 2. Frame assembly section; 3. Lifting component mounting portion; 31. Mounting groove; 32. Positioning stop; 33. Center groove; 34. First threaded hole; 35. Second threaded hole; 4. Frame connecting section; 5. Reinforcing ribs; 6. Movable outrigger mounting portion; 61. Upper mounting support; 62. Lower mounting support; 63. Contact arc surface; 64. Positioning arc surface; 7. Traction support. DETAILED DESCRIPTION

[0027] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0028] The following describes the engineering machinery and its frame according to the present application with reference to the accompanying drawings.

[0029] like Figure 1 and Figure 2 As shown, a specific embodiment of the present application provides an engineering machinery frame 100, including a frame middle section 1 and a frame assembly section 2, wherein a lifting component mounting portion 3 and a movable leg mounting portion 6 are formed on the frame middle section 1; the frame assembly section 2 is connected to the front or rear of the frame middle section 1, and the horizontal plane where the highest point of the frame assembly section 2 is located is lower than or flush with the horizontal plane where the highest point of the frame middle section 1 is located, and the horizontal plane where the lowest point of the frame assembly section 2 is located is higher than the horizontal plane where the lowest point of the frame middle section 1 is located.

[0030] The construction machinery frame 100 is the main load-bearing component of the construction machinery chassis. The construction machinery frame 100 is composed of a frame middle section 1 and a frame assembly section 2, wherein the loads borne by the frame assembly section 2 and the lifting components are all transmitted to the frame middle section 1. Therefore, the frame middle section 1 is the core load-bearing component of the construction machinery chassis. In other words, the structural strength of the frame middle section 1 determines the load-bearing capacity of the construction machinery chassis. In the present application, by setting the horizontal plane where the highest point of the frame middle section 1 is located to be higher than or flush with the horizontal plane where the highest point of the frame assembly section 2 is located, and setting the horizontal plane where the lowest point of the frame middle section 1 is located to be lower than the horizontal plane where the lowest point of the frame assembly section 2 is located, the cross-sectional height of the frame middle section 1 is increased relative to the frame assembly section 2, thereby significantly improving the structural strength of the frame middle section 1, thereby improving the structural strength of the construction machinery frame 100.

[0031] At the same time, the lifting components of the engineering machinery are installed on the lifting component installation part 3 of the middle section 1 of the frame. The lifting components will generate torque on the engineering machinery frame 100. Once the torque generated by the lifting components on the engineering machinery frame 100 exceeds the limit value, it may cause the engineering machinery to tip over. The magnitude of the torque depends on the height of the center of gravity of the lifting components and the load on the lifting components. It can be seen that in order to avoid tipping, it is necessary to lower the height of the center of gravity of the lifting components or reduce the load on the lifting components. The load on the lifting components is mainly the weight of the lifted objects. If the weight of the lifted objects is restricted, the engineering machinery will not be able to participate in the lifting of heavy objects. The height of the center of gravity of the lifting components is determined by the height of the lifting components themselves and the height of the installation position of the lifting components. If the height of the lifting components themselves is reduced, it will affect the structural strength of the lifting components, thereby causing the lifting performance of the engineering machinery to decrease. Therefore, lowering the height of the installation position of the lifting components is an effective way to avoid tipping of the engineering machinery.

[0032] In a specific embodiment of the present application, the structural strength of the middle frame section 1 is increased by increasing the cross-sectional height of the middle frame section 1, and the increase in the cross-sectional height of the middle frame section 1 can be selected by increasing the height of the highest point of the middle frame section 1 and / or reducing the height of the lowest point of the middle frame section 1. Once the height of the highest point of the middle frame section 1 is increased, it means that the height of the lifting component mounting portion 3 on the middle frame section 1 will increase accordingly. In other words, the installation position height of the lifting component increases. Therefore, in the present application, the height of the lowest point of the middle frame section 1 is reduced by setting the horizontal plane where the highest point of the middle frame section 1 is higher than or flush with the horizontal plane where the highest point of the frame component section 2 is located, and setting the horizontal plane where the lowest point of the middle frame section 1 is located lower than the horizontal plane where the lowest point of the frame component section 2 is located, thereby increasing the cross-sectional height of the middle frame section 1, and then reducing the installation position height of the lifting component while strengthening the structural strength of the middle frame section 1, so as to improve the lifting performance of the engineering machinery and ensure the safety performance of the engineering machinery.

[0033] In addition, some mobile engineering machinery is a road vehicle, and the height of a road vehicle cannot be increased indefinitely. In the present application, the structural strength of the mid-frame 1 is increased by lowering the height of the lowest point of the mid-frame 1 without changing the height of the highest point of the mid-frame 1. This will not increase the overall height of the engineering machinery, thereby improving the lifting performance of the engineering machinery while complying with the requirements of relevant road regulations.

[0034] It should be noted that in the description of the specific embodiment of the present application, the engineering machinery frame 100 extends in the front-to-back direction, the "cross-section" refers to the cross-section perpendicular to the center line of the engineering machinery frame 100 in the front-to-back direction, the "height" is along the up-down direction, and "higher than" and "lower than" both refer to the positional relationship along the up-down direction. The "front-to-back direction", "up-down direction" and "left-right direction" are all as shown by the arrows in the accompanying drawings.

[0035] In some embodiments, the horizontal plane where the highest point of the frame segment 2 is located is flush with the horizontal plane where the highest point of the middle frame segment 1 is located, and the height difference between the lowest point of the middle frame segment 1 and the lowest point of the frame segment 2 is 1 / 3 to 1 / 2 of the height difference between the lowest point and the highest point of the frame segment 2.

[0036] Specifically, the height difference between the lowest point and the highest point of the frame assembly segment 2 is the cross-sectional height of the frame assembly segment 2, and the height difference between the lowest point of the frame middle section 1 and the lowest point of the frame assembly segment 2 is the cross-sectional height difference between the frame middle section 1 and the frame assembly segment 2. The degree to which the bottom of the frame middle section 1 protrudes from the bottom of the frame assembly segment 2 is limited by setting the ratio of the cross-sectional height difference between the frame middle section 1 and the frame assembly segment 2 to the cross-sectional height of the frame assembly segment 2, so as to increase the cross-sectional strength of the frame middle section 1 while avoiding excessive stress concentration at the connection between the frame connecting segment 4 and the frame middle section 1 due to excessive strength difference.

[0037] Furthermore, the cross-sectional height of the frame assembly segment 2 and the cross-sectional height of the frame mid-section 1 can be adaptively adjusted according to the carrying capacity of the engineering machinery, and the ratio of the height difference between the lowest point of the frame mid-section 1 and the lowest point of the frame assembly segment 2 to the height difference between the lowest point and the highest point of the frame assembly segment 2 can also be adaptively adjusted, thereby reducing stress concentration to a minimum, thereby improving the carrying capacity of the engineering machinery frame 100.

[0038] In some embodiments, the engineering machinery frame 100 further includes a frame connecting section 4 connecting the frame middle section 1 and the frame assembly section 2, the lowest point of the frame connecting section 4 and the lowest point of the frame middle section 1 are located in the same horizontal plane, and the highest point of the frame connecting section 4 and the highest point of the frame middle section 1 are located in the same horizontal plane.

[0039] Specifically, the highest point of the frame connecting section 4 is located at the end where the top of the frame connecting section 4 is connected to the frame middle section 1, and the lowest point of the frame connecting section 4 is located at the end where the bottom of the frame connecting section 4 is connected to the frame assembly section 2. The frame connecting section 4 is used to achieve a height difference transition between the frame assembly section 2 and the frame middle section 1, thereby avoiding excessive stress concentration caused by sudden cross-sectional changes, thereby improving the load-bearing capacity of the engineering machinery frame 100.

[0040] Furthermore, the bottom of the frame connecting section 4 is a curved structure to achieve a smooth transition between the frame component section 2 and the frame middle section 1. A reinforcing rib 5 is arranged at the bottom of the frame connecting end to strengthen the strength of the frame connecting section 4.

[0041] In some embodiments, the top of the middle frame section 1, the top of the frame assembly section 2, and the top of the frame connection section 4 are all planar structures, and the top of the middle frame section 1, the top of the frame assembly section 2, and the top of the frame connection section 4 are flush with each other. In other words, the top of the engineering machinery frame 100 is a planar structure, and it can be seen that the top of the engineering machinery frame 100 can provide a horizontal installation platform for other functional components to facilitate the installation of other functional components. The top of the engineering machinery frame 100 can also be used as a storage platform to increase the space for the engineering machinery to place the tools and materials on board.

[0042] In some embodiments, the middle section 1 of the frame includes a middle section top plate, a middle section bottom plate and a middle section web plate, the frame connecting section 4 includes a connecting section top plate, a connecting section bottom plate and a connecting section web plate, and the frame component section 2 includes a component section top plate, a component section bottom plate and a component section web plate, the connecting section top plate connects the middle section top plate and the component section top plate, the connecting section web plate connects the middle section web plate and the component section web plate located on the same side, the connecting section bottom plate connects the middle section bottom plate and the component section bottom plate, the thickness of the middle section top plate, the connecting section top plate and the component section top plate decreases in sequence, the thickness of the middle section bottom plate, the connecting section bottom plate and the component section bottom plate decreases in sequence, and the thickness of the middle section web plate, the connecting section web plate and the component section web plate decreases in sequence.

[0043] Since the loads borne by the frame middle section 1, the frame connecting section 4 and the frame assembly section 2 decrease successively, the required structural strength decreases successively. By setting the plate thicknesses of the frame middle section 1, the frame connecting section 4 and the frame assembly section 2 to decrease successively, the strength redundancy of the plate can be reduced, thereby saving material costs and reducing the dead weight of the engineering machinery frame 100.

[0044] In some embodiments, the middle section web is located on the outside of the component section web, that is, the width of the frame middle section 1 along the left-right direction is greater than the width of the frame component section 2 along the left-right direction, so as to increase the cross-sectional width of the frame middle section 1, thereby improving the structural strength of the frame middle section 1, and further improving the load-bearing capacity of the engineering machinery frame 100.

[0045] Furthermore, the web of the connecting section is a curved structure, and one end connected to the middle section web is located on the outside of one end connected to the component section web, so as to achieve a width difference transition between the frame component section 2 and the frame middle section 1, thereby avoiding excessive stress concentration caused by cross-sectional mutation, and further improving the load-bearing capacity of the engineering machinery frame 100.

[0046] like Figure 3 and Figure 4 As shown, in some embodiments, the lifting component mounting portion 3 includes a mounting groove 31, which is formed by the top recess of the middle section 1 of the frame; the lifting component mounting portion 3 also includes a positioning stop 32, which is formed by the top recess of the middle section 1 of the frame, and the positioning stop 32 is located on the outside of the mounting groove 31, and the horizontal plane where the bottom of the positioning stop 32 is located is flush with the horizontal plane where the top of the mounting groove 31 is located.

[0047] Specifically, the positioning stop 32 is an arc-shaped structure, the mounting groove 31 is a circular structure, and the positioning stop 32 and the mounting groove 31 are coaxially arranged.

[0048] Furthermore, a central groove 33 is provided at the center of the installation groove 31. The central groove 33 is formed by the groove bottom wall of the installation groove 31 being concave. The central groove 33 is a circular structure, and the central groove 33 and the installation groove 31 are coaxially arranged. The lifting component is positioned and installed by the installation groove 31, the central groove 33 and the positioning stop 32, thereby improving the installation efficiency of the lifting component.

[0049] In some embodiments, the lifting component mounting portion 3 includes a plurality of threaded hole groups arranged in a concentric circle form, and each threaded hole group includes a plurality of threaded holes arranged at intervals along the circumferential direction.

[0050] Specifically, the number of the threaded hole groups is two and they are respectively a first threaded hole group and a second threaded hole group. The first threaded hole group includes a plurality of first threaded holes (34) arranged at intervals along a first circumferential direction, and the second threaded hole group includes a plurality of second threaded holes (35) arranged at intervals along a second circumferential direction. The first circumferential direction and the second circumferential direction are concentric. The first threaded hole 34 and the second threaded hole 35 are both arranged between the positioning stop 32 and the mounting groove 31. The lifting component is installed by setting the first threaded hole 34 and the second threaded hole 35 to improve the connection strength between the lifting component and the middle section 1 of the frame.

[0051] Furthermore, the first threaded hole 34 and the second threaded hole 35 are cross-arranged, that is, the first threaded hole 34 is arranged between two adjacent second threaded holes 35, and the second threaded hole 35 is arranged between two adjacent first threaded holes 34, so that the arrangement of the first threaded hole 34 and the second threaded hole 35 is more compact, thereby reducing the installation space required for the bolt.

[0052] In some embodiments, the engineering machinery frame 100 also includes a movable leg mounting portion 6, which includes an upper mounting support 61 and a lower mounting support 62, wherein the upper mounting support 61 is formed with a contact arc surface 63 for movably cooperating with the movable leg, and the lower mounting support 62 is formed with a positioning arc surface 64 for movably cooperating with the movable leg.

[0053] Specifically, the upper mounting support 61 is arranged at the top of the middle section 1 of the frame, and the lower mounting support 62 is arranged at the bottom of the middle section 1 of the frame. Pin holes are formed on the upper mounting support 61 and the lower mounting support 62, and the pin holes on the upper mounting support 61 and the lower mounting support 62 are coaxially arranged. The movable support leg includes an upper connecting part and a lower connecting part. The upper connecting part is pin-connected to the upper mounting support 61, and the upper connecting part is matched with the contact arc surface 63 for movement and limitation, that is, the upper connecting part moves along the contact arc surface 63, and the lower connecting part is pin-connected to the lower mounting support 62, and the lower connecting part is matched with the positioning arc surface 64 for movement and limitation, that is, the lower connecting part moves along the positioning arc surface 64.

[0054] Furthermore, the installation of the movable leg can be positioned by the positioning arc surface 64 and the contact arc surface 63, thereby improving the installation efficiency of the movable leg.

[0055] Furthermore, there are four upper mounting supports 61, which are respectively located at the four corners of the top of the middle section 1 of the frame; there are four lower mounting supports 62, which are respectively located at the four corners of the bottom of the middle section 1 of the frame; the four upper mounting supports 61 are arranged symmetrically, and the four lower mounting supports 62 are arranged symmetrically.

[0056] In some embodiments, the top of the frame assembly segment 2 is a folding surface structure and includes a first end close to the frame connection segment 4, a second end away from the frame connection segment 4, and a transition portion connecting the first end and the second end. The first end of the top of the frame assembly segment 2 is flush with the top of the frame connection segment 4, the second end of the top of the frame assembly segment 2 is lower than the first end of the top of the frame assembly segment 2, and the connecting portion of the top of the frame connection segment 4 is an inclined surface structure. Since the load borne by the portion of the frame assembly segment 2 away from the frame connection segment 4 is further reduced relative to the portion of the frame assembly segment 2 close to the frame connection segment 4, the required structural strength is further reduced. By reducing the cross-sectional height of the portion of the frame assembly segment 2 away from the frame connection segment 4, the structural strength redundancy is further reduced, thereby saving material costs and reducing the deadweight of the engineering machinery frame 100.

[0057] It should be noted that the number of the frame connecting sections 4, the frame component sections 2 and the frame extension sections is not limited, and those skilled in the art can arbitrarily set them according to actual needs.

[0058] In the exemplary embodiment of the present application, the number of the frame assembly sections 2 is two and the two frame assembly sections 2 are connected to the front and rear of the frame middle section 1 respectively, wherein the frame assembly section 2 connected to the front of the frame middle section 1 is the frame front section, and the frame assembly section 2 connected to the rear of the frame middle section 1 is the frame rear section. The number of the frame connecting sections 4 is two, wherein one frame connecting section 4 connects the frame front section with the frame middle section 1, and the other frame connecting section 4 connects the frame rear section with the frame middle section 1, the frame connecting section 4 connected to the frame front section is the front connecting section, and the frame connecting section 4 connected to the frame rear section is the rear connecting section. The number of the frame extension sections is two, wherein one frame extension section is connected to the front end of the frame front section, and the other frame extension section is connected to the rear end of the frame rear section, the frame extension section connected to the frame front section is the frame head section, and the frame extension section connected to the frame rear section is the frame tail section.

[0059] The middle section 1 of the frame is composed of a middle section top plate, a middle section bottom plate, a left middle section web plate and a right middle section web plate, the front section of the frame is composed of a front section top plate, a front section bottom plate, a left front section web plate and a right front section web plate, the rear section of the frame is composed of a rear section top plate, a rear section bottom plate, a left rear section web plate and a right rear section web plate, the front connecting section is composed of a front connecting section top plate, a front connecting section top plate, a left front connecting section web plate and a right front connecting section web plate, and the rear connecting section is composed of a rear connecting section top plate, a rear connecting section top plate, a left rear connecting section web plate and a right rear connecting section web plate.

[0060] The top surfaces of the middle section top plate, the front section top plate, the rear section top plate, the front connecting section top plate and the rear connecting section top plate are all flush with each other, the bottom surface of the middle section bottom plate is lower than the bottom surface of the front end bottom plate and the bottom surface of the rear section bottom plate, and the bottom surface of the front connecting section top plate and the bottom surface of the rear connecting section top plate are all arc-shaped surfaces.

[0061] The left middle section web plate is located on the left side of the left front section web plate, and the right middle section web plate is located on the right side of the right front section web plate, that is, the width of the middle section 1 of the frame along the left-right direction is greater than the width of the front section of the frame along the left-right direction; the left middle section web plate is located on the left side of the left rear section web plate, and the right middle section web plate is located on the right side of the right rear section web plate, that is, the width of the middle section 1 of the frame along the left-right direction is greater than the width of the rear section of the frame along the left-right direction.

[0062] The left sides of the web plate of the left front connecting section and the web plate of the left rear connecting section are both arc-shaped surfaces, and the right sides of the web plate of the right rear connecting section and the web plate of the right rear connecting section are both arc-shaped surfaces.

[0063] A traction support 7 is provided at the rear end of the rear section of the frame, and upper pin holes for connecting other traveling components are symmetrically arranged at the upper end of the traction support 7, and lower pin holes for connecting other traveling components are symmetrically arranged at the lower end of the traction support 7.

[0064] The specific embodiment of the present application further provides an engineering machine, comprising the above-mentioned engineering machine frame 100. Since the engineering machine adopts all embodiments of the engineering machine frame 100, the engineering machine has all the beneficial effects brought by the engineering machine frame 100.

[0065] Construction machinery includes cranes and pump trucks, etc.

[0066] It should be noted that, in the description of the present application, the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer", etc., indicating directions or positional relationships, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0067] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An engineering machinery frame, characterized in that: include: A vehicle frame middle section (1), wherein the vehicle frame middle section (1) is provided with a lifting component mounting portion (3) and a movable leg mounting portion (6); The frame assembly section (2) is connected to the front or rear of the frame middle section (1), the horizontal plane where the highest point of the frame assembly section (2) is located is lower than or flush with the horizontal plane where the highest point of the frame middle section (1) is located, and the horizontal plane where the lowest point of the frame assembly section (2) is located is higher than the horizontal plane where the lowest point of the frame middle section (1) is located.

2. The construction machinery frame according to claim 1, characterized in that: The top of the vehicle frame middle section (1) and the top of the vehicle frame component section (2) are both planar structures, and the top of the vehicle frame middle section (1) and the top of the vehicle frame component section (2) are flush.

3. The construction machinery frame according to claim 1, characterized in that: The height difference between the lowest point of the frame middle section (1) and the lowest point of the frame component section (2) is 1 / 4 to 1 / 2 of the height difference between the lowest point and the highest point of the frame component section (2).

4. The construction machinery frame according to claim 1, characterized in that: The engineering machinery frame (100) further comprises a frame connecting section (4) connecting the frame middle section (1) and the frame component section (2); the lowest point of the frame connecting section (4) and the lowest point of the frame middle section (1) are located in the same horizontal plane, and the highest point of the frame connecting section (4) and the highest point of the frame middle section (1) are located in the same horizontal plane.

5. The construction machinery frame according to claim 4, characterized in that: The frame middle section (1) comprises a middle section top plate, a middle section bottom plate and a middle section web plate, the frame connecting section (4) comprises a connecting section top plate, a connecting section bottom plate and a connecting section web plate, the frame component section (2) comprises a component section top plate, a component section bottom plate and a component section web plate, the connecting section top plate connects the middle section top plate and the component section top plate, the connecting section web plate connects the middle section web plate and the component section web plate located on the same side, the connecting section bottom plate connects the middle section bottom plate and the component section bottom plate, the thickness of the middle section top plate, the connecting section top plate and the component section top plate decreases in sequence, the thickness of the middle section bottom plate, the connecting section bottom plate and the component section bottom plate decreases in sequence, and the thickness of the middle section web plate, the connecting section web plate and the component section web plate decreases in sequence.

6. The construction machinery frame according to any one of claims 1 to 5, characterized in that: The lifting component mounting portion (3) comprises a plurality of threaded hole groups arranged in a concentric circle form, and each threaded hole group comprises a plurality of threaded holes arranged at intervals along the circumferential direction.

7. The construction machinery frame according to claim 6, characterized in that: The number of the threaded hole groups is two and they are respectively a first threaded hole group and a second threaded hole group. The first threaded hole group includes a plurality of first threaded holes (34) arranged at intervals along a first circumferential direction, and the second threaded hole group includes a plurality of second threaded holes (35) arranged at intervals along a second circumferential direction. The first threaded holes (34) and the second threaded holes (35) are arranged crosswise.

8. The construction machinery frame according to any one of claims 1 to 5, characterized in that: The movable leg mounting portion (6) comprises an upper mounting support (61) and a lower mounting support (62); the upper mounting support (61) is formed with a contact arc surface (63) that movably cooperates with the movable leg, and the lower mounting support (62) is formed with a positioning arc surface (64) that movably cooperates with the movable leg.

9. The construction machinery frame according to any one of claims 1 to 5, characterized in that: The end of the frame component section (2) away from the frame middle section (1) is provided with a traction support (7) for connecting other functional components.

10. An engineering machine, characterized in that: It comprises the construction machinery frame (100) according to any one of claims 1 to 9.

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