Frame for engineering machinery, frame system and engineering machinery

Abstract

The utility model relates to a frame for engineering machinery, a frame system and the engineering machinery. The frame comprises a frame, a front cross beam assembly and a rear cross beam assembly which are fixed in the frame, and two rib plates arranged between the front cross beam assembly and the rear cross beam assembly; each of the front cross beam assembly and the rear cross beam assembly comprises two inclined sections which are symmetrically arranged about a vertical plane and a connecting section which is connected between the two inclined sections, so that an arched structure which is arched downwards in the vertical direction is formed; the inclined extension direction of the inclined section forms a first included angle relative to the vertical direction; a second included angle is formed between the length extension direction of the end surface, connected with the corresponding inclined part section, of the rib plate and the vertical direction; the second included angle is larger than the first included angle. According to the frame, stress at the two ends of the rib plate in the thickness direction of the rib plate is homogenized, and the phenomenon of stress concentration of the ends of the rib plate in the thickness direction of the rib plate is improved to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of frames of engineering machinery, in particular to a frame used for engineering machinery, a frame system comprising the frame, and engineering machinery comprising the frame system. Background Art

[0002] Construction machinery, especially wheel loaders, operates in harsh environments, often navigating uneven surfaces or steep slopes. To ensure that all tires maintain ground contact, wheel loaders utilize a unique swing frame structure. This swing frame comprises a movable swing frame and a fixed swing frame. The fixed swing frame is connected to the wheel loader's frame, while the movable swing frame is connected to the axle. The movable and fixed swing frames are hinged at their front and rear ends, respectively, along the wheel loader's travel direction, via pins. This allows loads acting on the movable swing frame to be directly transferred to the frame.

[0003] In the prior art, a reinforcement plate is typically installed near the position of the frame corresponding to the fixed swing frame to increase the frame's support rigidity. However, in actual use, this reinforcement plate often suffers from problems such as weld cracking due to high stress, thereby reducing the life of the frame. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above problems and / or other problems existing in the prior art.

[0005] To achieve the above-mentioned object, according to one aspect of the present invention, there is provided a vehicle frame for an engineering machine, the vehicle frame comprising a frame and a front crossbeam assembly and a rear crossbeam assembly spaced apart along the traveling direction of the engineering machine and fixed within the frame, the frame defining a central axis extending parallel to the traveling direction and a vertical plane extending through the central axis; each of the front crossbeam assembly and the rear crossbeam assembly comprises two inclined sections symmetrically arranged with respect to the vertical plane and a connecting section connected between the two inclined sections to form an arched structure arched downward in the vertical direction; the inclined extension direction of the inclined sections The front crossbeam assembly and the rear crossbeam assembly are symmetrically arranged with respect to the vertical plane, and the frame further comprises two ribs arranged between the front crossbeam assembly and the rear crossbeam assembly, each rib comprising a first end connected to a corresponding inclined section of the front crossbeam assembly and a second end connected to a corresponding inclined section of the rear crossbeam assembly, and a length extension direction of an end face connected to the corresponding inclined section of each end portion is at a second angle relative to the vertical direction; wherein the ribs are oriented between the front crossbeam assembly and the rear crossbeam assembly so that the second angle is greater than the first angle and there is an angle difference between the two.

[0006] As an embodiment, the angle has a numerical range of 12.5° to 15.5°.

[0007] As an embodiment, the angle is 14°.

[0008] As an embodiment, the rib plate further includes a middle section connected between the first end portion and the second end portion, and the cross-sectional area of ​​each of the first end portion and the second end portion is larger than the cross-sectional area of ​​the middle section.

[0009] As an embodiment, a rounded corner is formed at the connection between each end of the rib and the middle section.

[0010] As an embodiment, each of the front crossbeam assembly and the rear crossbeam assembly includes two crossbeams arranged side by side and two connecting beams symmetrically arranged about the vertical plane and connected between the two crossbeams, each crossbeam includes two inclined portions symmetrically arranged about the vertical plane and a connecting portion connected between the two inclined portions, wherein the inclined portions aligned with each other and the connecting portions aligned with each other of the two crossbeams arranged side by side respectively form the inclined sections and connecting sections of the corresponding crossbeam assembly.

[0011] As an embodiment, a reinforcing plate is centrally provided at the connecting portion of each cross beam on a side of the cross beam away from the connecting beam.

[0012] As an embodiment, the frame includes a first longitudinal beam and a second longitudinal beam arranged spaced apart from each other, and each of the front cross beam assembly and the rear cross beam assembly further includes two end sections connected to the corresponding two inclined sections, and the two end sections are respectively fixed to the first longitudinal beam and the second longitudinal beam.

[0013] According to another aspect of the present invention, a frame system is provided, which includes a movable swing frame and a frame as described above, wherein center pin holes are respectively provided in the connecting sections of the front cross beam assembly and the rear cross beam assembly, and the movable swing frame is respectively hinged to the front cross beam assembly and the rear cross beam assembly via a pin shaft passing through the center pin hole.

[0014] According to another aspect of the present invention, a construction machine is provided. The construction machine includes the frame system as described above.

[0015] The vehicle frame of the present invention is provided with a rib plate between two corresponding inclined sections of the front cross-beam assembly and the rear cross-beam assembly along the direction of travel, and by orienting the rib plate at an optimal angle between the front cross-beam assembly and the rear cross-beam assembly, the stress at the upper and lower ends of the rib plate along the thickness direction is balanced, thereby improving the stress concentration phenomenon at the ends of the rib plate to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features and advantages of the present invention will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limiting the present invention, wherein:

[0017] Figure 1 A perspective view of a vehicle frame according to an embodiment of the present invention is shown, wherein a central axis extending parallel to the traveling direction of the engineering machine and a vertical plane passing through the central axis are also shown.

[0018] Figure 2 Show Figure 1 A cross-sectional view of the frame shown is taken along a vertical plane.

[0019] Figure 3 Show Figure 1 The diagram shows the assembly status of the front crossbeam assembly, the rear crossbeam assembly and the rib plate arranged between the two crossbeam assemblies of the vehicle frame.

[0020] Figure 4 Show Figure 3 The front crossbeam assembly (or rear crossbeam assembly) and the rib plate are shown as a schematic diagram cut along a plane transverse to the travel direction of the engineering machinery.

[0021] Figure 5 Show Figure 3 A three-dimensional view of the rib plate shown. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented without some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the features and elements described below may be considered to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be considered as elements or limitations of the claims unless expressly set forth in the claims.

[0023] When terms such as "first" and "second" are used below to describe elements of the present application, these terms are used solely to distinguish between the elements and are not intended to limit the nature, order, or number of the elements. The terms "including" and "having" are intended to convey an open-ended sense of inclusion and indicate that additional elements / components may be present in addition to the listed elements / components. Directional terms such as "front," "rear," "left," and "right" used below should be understood in relation to the normal direction of travel of the construction machinery.

[0024] Figure 1 and Figure 2 FIG. 1 shows a frame for an engineering machine according to an embodiment of the present invention, such as a rear frame. Figure 1 and Figure 2 As shown, the vehicle frame according to this embodiment may include a frame 1 , a front crossbeam assembly 2 , a rear crossbeam assembly 3 and two ribs 4 .

[0025] The frame 1 may include a first longitudinal beam 11, a second longitudinal beam 12, a first cross beam 13, and a second cross beam 14. The first longitudinal beam 11 and the second longitudinal beam 12 both extend along the travel direction J of the engineering machine and are spaced apart from each other in a horizontal direction transverse to the travel direction J (i.e., corresponding to the left and right direction of the engineering machine). The front ends of the first longitudinal beam 11 and the second longitudinal beam 12 in the travel direction J are connected via the first cross beam 13, and the rear ends of the first longitudinal beam 11 and the second longitudinal beam 12 in the travel direction J are connected via the second cross beam 14, thereby forming the entire frame 1. Figure 1 As shown, the middle portion of the first cross member 13 protrudes outward in the direction of travel J, allowing for a vertically extending pin hole to be provided at its front end. The pin passes through the pin hole and is hingedly connected to another frame portion (if the frame in this embodiment is a rear frame, the other frame portion may be the front frame). The frame 1 defines a central axis O parallel to the direction of travel J and a vertical plane P passing through the central axis O.

[0026] The front cross-beam assembly 2 and the rear cross-beam assembly 3 are spaced apart and arranged parallel to each other along the travel direction J of the construction machine, and extend generally in a horizontal direction transverse to the travel direction J. The left and right ends of the front cross-beam assembly 2 and the rear cross-beam assembly 3 are connected to the first longitudinal beam 11 and the second longitudinal beam 12, respectively.

[0027] Specifically, refer to Figure 1As shown, the front crossbeam assembly 2 may include two inclined sections 21 and a connecting section 22. The two inclined sections 21 are symmetrically arranged about the vertical plane P and extend obliquely downward and relative to each other in the vertical direction, and the connecting section 22 is connected between the two inclined sections 21. Correspondingly, the rear crossbeam assembly 3 may also include two inclined sections 31 and a connecting section 32. The two inclined sections 31 are symmetrically arranged about the vertical plane P and extend obliquely downward and relative to each other in the vertical direction, and the connecting section 32 is connected between the two inclined sections 31. The center axis O passes through the center of the connecting sections 22 and 32. Thus, the front crossbeam assembly 2 and the rear crossbeam assembly 3 respectively form an arched structure that arches downward in the vertical direction. The two ribs 4 are symmetrically arranged about the vertical plane P between the two crossbeam assemblies. The front end of each rib 4 can be connected to the corresponding inclined section 21 in the front crossbeam assembly by welding, and the rear end of each rib 4 can be connected to the corresponding inclined section 31 in the rear crossbeam assembly by welding. For example, the left side (i.e. Figure 1 The rib 4 is connected between the inclined section 21 and the inclined section 31 on the left side, and the right side (i.e. Figure 1 The rib 4 on the lower side (in the middle) is connected between the inclined section 21 and the inclined section 31 on the right.

[0028] Figure 2 and Figure 3 The specific structures of the front crossbeam assembly 2 and the rear crossbeam assembly 3 are highlighted. Figure 2 and Figure 3 As shown, the front cross beam assembly 2 may include two cross beams 23 and two connecting beams 24 ( Figure 2 and 3 Only one is visible. The two crossbeams 23 are arranged side by side along the travel direction J and extend in the left-right direction. The two connecting beams 24 are arranged symmetrically about the vertical plane P and are connected between the two crossbeams 23. Accordingly, the rear crossbeam assembly 3 may include two crossbeams 33 and two connecting beams 34. The two crossbeams 33 are arranged side by side along the travel direction J and extend in the left-right direction. The two connecting beams 34 are arranged symmetrically about the vertical plane P and are connected between the two crossbeams 33.

[0029] refer to Figure 3As shown, each cross member 23 of the front cross member assembly 2 may include two inclined portions 231 arranged bilaterally symmetrically with respect to a vertical plane P and a connecting portion 232 connecting the two inclined portions 231. The inclined portions 231 of the two cross members 23 aligned with each other form the corresponding inclined section 21 of the front cross member assembly 2, and the connecting portions 232 of the two cross members 23 aligned with each other form the connecting section 22 of the front cross member assembly 2. Correspondingly, each cross member 33 of the rear cross member assembly 3 may include two inclined portions 331 arranged bilaterally symmetrically with respect to a vertical plane P and a connecting portion 332 connecting the two inclined portions 331. The inclined portions 331 of the two cross members 33 aligned with each other form the corresponding inclined section 31 of the rear cross member assembly 3, and the connecting portions 332 of the two cross members 33 aligned with each other form the connecting section 32 of the rear cross member assembly 3.

[0030] like Figure 2 and Figure 3 As shown, a center pin hole 26 extending in the travel direction J is provided in the middle of the connecting section 22 of the front cross-beam assembly 2. This center pin hole 26 is correspondingly formed in the middle of the connecting portion 232 of each cross-beam 23. Correspondingly, a center pin hole 36 extending in the travel direction J is provided in the middle of the connecting section 32 of the rear cross-beam assembly 3. This center pin hole 36 is correspondingly formed in the middle of the connecting portion 332 of each cross-beam 33. The two center pin holes 26, 36 are aligned with each other in the travel direction J.

[0031] Still refer to Figure 2 and Figure 3 To increase the structural strength of the center pin holes 26 and 36 of the connecting portions 232 and 332, the front cross-beam assembly 2 may further include two reinforcing plates 25. The two reinforcing plates 25 are respectively disposed on the surfaces of the two cross-beams 23 facing away from each other (i.e., the surface of each cross-beam 23 facing away from the connecting beam 24) and are fixedly connected to the connecting portions 232 of the cross-beams 23. Correspondingly, the rear cross-beam assembly 3 may also include two reinforcing plates 35. The two reinforcing plates 35 are respectively disposed on the surfaces of the two cross-beams 33 facing away from each other (i.e., the surface of each cross-beam 33 facing away from the connecting beam 34) and are fixedly connected to the connecting portions 332 of the cross-beams 33.

[0032] Figure 4The diagram schematically illustrates a cross-sectional view of the front cross-beam assembly 2, the rear cross-beam assembly 3, and the rib plate 4, taken along a plane transverse to the travel direction J and passing through approximately the middle of the rib plate 4, viewed forward or rearward along the travel direction J. The front cross-beam assembly 2 may further include two end sections 27, each of which extends horizontally from an end of a corresponding inclined section 21 remote from the connecting section 22, in a direction transverse to the travel direction J. Accordingly, the rear cross-beam assembly 3 may further include two end sections 37, each of which extends horizontally from an end of a corresponding inclined section 31 remote from the connecting section 32, in a direction transverse to the travel direction J.

[0033] Figure 5 The specific structure of the rib plate 4 is shown in FIG. According to one embodiment of the rib plate 4, the rib plate 4 may include a first end 41, a second end 42, and a middle section 43 connected between the first and second ends 41, 42. The first and second ends 41, 42 are symmetrically arranged about the middle section 43, and the cross-sectional area of ​​each of the first and second ends 41, 42 is larger than the cross-sectional area of ​​the middle section 43. This enhances the connection strength between the rib plate 4 and the front and rear cross-beam assemblies 2 and 3, respectively, when the first end 41 is connected to the corresponding inclined section 21 of the front cross-beam assembly 2 and the second end 42 is connected to the corresponding inclined section 31 of the rear cross-beam assembly 3. Optionally, a rounded corner 44 may be formed at the connection between each end of the rib plate 4 (e.g., the first and second ends 41, 42) and the middle section 43, for example, on one side corresponding to the width of the rib plate 4. This ensures a smooth and balanced load transfer from the first and second ends 41, 42 to the middle section 43.

[0034] Return Reference Figure 4 The inclined extension direction K of the inclined section 21 of the front crossbeam assembly 2 (or the inclined section 31 of the rear crossbeam assembly 3) forms a first angle α with respect to the vertical direction (or with respect to the vertical plane P). The longitudinal extension direction L of the end surface of the first end 41 (or second end 42) of the rib plate 4 connected to the corresponding inclined section 21 (or inclined section 31) (i.e., the overall width extension direction of the rib plate 4) forms a second angle β with respect to the vertical direction. Advantageously, the rib plate is oriented between the front and rear crossbeam assemblies such that the second angle β is greater than the first angle α, and there is an angle difference between the second angle β and the first angle α. This allows for stress balance at the upper and lower ends of the rib plate 4 along its thickness direction. The angle difference between the second angle β and the first angle α is preferably in the range of 12.5° to 15.5°, with 14° being preferred.

[0035] The present invention also provides a vehicle frame system, which may include a movable swing frame (not shown) and the vehicle frame. The present invention also provides an engineering machine including the vehicle frame system.

[0036] Industrial Applicability

[0037] The vehicle frame according to the present invention is suitable for the vehicle frame system of engineering machinery, especially wheel loaders. However, it should be understood that the vehicle frame according to the present invention can also be used for other engineering machinery with wheeled travel systems.

[0038] Compared to the prior art, the vehicle frame according to the present invention provides a rib plate 4 between two corresponding inclined sections 21 and 31 of the front and rear cross-beam assemblies 2 and 3 along the travel direction J. Furthermore, the rib plate 4 is oriented between the front and rear cross-beam assemblies 2 and 3 such that the second angle β is greater than the first angle α. This balances the stresses in the thickness direction of the rib plate 4, thereby minimizing stress concentration in the thickness directions of the first and second ends 41 and 42 of the rib plate 4. Furthermore, by optimizing the orientation angle of the rib plate (e.g., by making the second angle differ from the first angle by 14°), under the same load conditions as in the prior art, the stresses on the upper surfaces of the first and second ends 41 and 42 of the rib plate 4, corresponding to the thickness direction of the rib plate 4, can be reduced by, for example, 50%, thereby significantly improving the service life of the vehicle frame.

[0039] When the vehicle frame or frame system of the present invention is applied to construction machinery, the movable swing frame in the frame system may include a front beam, a rear beam, and two longitudinal beams connected between the front and rear beams. The center of the front beam is centrally hinged to the connecting section 22 of the front crossbeam assembly 2 via a pin extending through a center pin hole 26. The center of the rear beam is centrally hinged to the connecting section 32 of the rear crossbeam assembly 3 via a pin extending through a center pin hole 36. The rear axle of the construction machinery is mounted between the two longitudinal beams. Thus, when the construction machinery travels on uneven roads, the movable swing frame can swing left and right relative to the front and rear crossbeam assemblies 2 and 3. The rib plate 4 described in the above embodiment, connected between the front and rear crossbeam assemblies 2 and 3, not only increases the support stiffness of the frame but also prevents excessive or unbalanced stress from being distributed to one side of the rib plate 4 along its thickness. This prevents failures such as cracking in the welds of the rib plate 4 and increases the service life of the frame.

[0040] It will be apparent to those skilled in the art that various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the present invention. Other embodiments of the present invention will be apparent to those skilled in the art from the practice of the present invention disclosed herein. This specification and the examples disclosed herein should be considered as illustrative only, and the true scope of the present invention is indicated by the appended claims and their equivalents.

Claims

1. A vehicle frame for an engineering machine, comprising a frame (1) and a front crossbeam assembly (2) and a rear crossbeam assembly (3) spaced apart along a travel direction (J) of the engineering machine and fixed within the frame, wherein the frame (1) defines a central axis (O) extending parallel to the travel direction and a vertical plane (P) extending through the central axis; It is characterized by: Each of the front cross-beam assembly and the rear cross-beam assembly includes two inclined sections symmetrically arranged about the vertical plane and a connecting section connected between the two inclined sections, so as to form an arched structure arched downward in the vertical direction; an inclined extension direction (K) of the inclined sections forms a first angle (α) with respect to the vertical direction; The vehicle frame further comprises two ribs (4) arranged between the front cross-beam assembly and the rear cross-beam assembly and symmetrically arranged about the vertical plane, each rib comprising a first end (41) connected to a corresponding inclined section of the front cross-beam assembly and a second end (42) connected to a corresponding inclined section of the rear cross-beam assembly, wherein a longitudinal extension direction (L) of an end surface of each end connected to the corresponding inclined section forms a second angle (β) with respect to the vertical direction; The rib is oriented between the front cross-beam assembly and the rear cross-beam assembly such that the second angle (β) is greater than the first angle (α) and there is an angle difference between the two.

2. The frame according to claim 1, wherein: The angle has a numerical range of 12.5° to 15.5°.

3. The frame according to claim 2, wherein: The angle is 14°.

4. The frame according to any one of claims 1 to 3, characterized in that The rib plate (4) further includes a middle section (43) connected between the first end (41) and the second end (42), wherein the cross-sectional area of ​​each of the first end and the second end is larger than the cross-sectional area of ​​the middle section.

5. The vehicle frame according to claim 4, wherein: A rounded corner (44) is formed at the connection between each end of the rib plate (4) and the middle section.

6. The frame according to any one of claims 1 to 3, characterized in that Each of the front crossbeam assembly (2) and the rear crossbeam assembly (3) includes two crossbeams arranged side by side and two connecting beams symmetrically arranged about the vertical plane and connected between the two crossbeams, each crossbeam includes two inclined portions symmetrically arranged about the vertical plane and a connecting portion connected between the two inclined portions, wherein the inclined portions aligned with each other and the connecting portions aligned with each other of the two crossbeams arranged side by side respectively form the inclined sections and the connecting sections of the corresponding crossbeam assembly.

7. The frame according to claim 6, characterized in that A reinforcing plate is centrally provided at a connecting portion of each cross beam on a side of the cross beam away from the connecting beam.

8. The vehicle frame according to any one of claims 1 to 3, characterized in that: The frame (1) includes a first longitudinal beam (11) and a second longitudinal beam (12) arranged spaced apart from each other, and each of the front cross beam assembly and the rear cross beam assembly further includes two end sections connected to the corresponding two inclined sections, and the two end sections are respectively fixed to the first longitudinal beam (11) and the second longitudinal beam (12).

9. A frame system, characterized in that: The frame system includes a movable swing frame and a frame according to any one of claims 1 to 8, wherein a center pin hole is respectively provided in the connecting section of each of the front cross beam assembly (2) and the rear cross beam assembly (3), and the movable swing frame is respectively hinged to the front cross beam assembly (2) and the rear cross beam assembly (3) via a pin shaft passing through the center pin hole.

10. An engineering machine, characterized in that: The construction machine includes the frame system according to claim 9.

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