Front cross member structure, loader front frame and loader

Abstract

The front cross beam structure, loader front frame and loader of the application relate to the field of loaders; the front cross beam structure comprises a first bent plate, a second bent plate, a horizontal plate, a rear sealing plate and two support plate assemblies, the two support plate assemblies are arranged in the left-right direction and are arranged above the horizontal plate, the first bent plate is welded between the two support plate assemblies, the second bent plate is arranged between the horizontal plate and the two support plate assemblies and is welded with the front end of the horizontal plate and the two support plate assemblies respectively, and the rear sealing plate is welded with the rear end of the second bent plate and the rear end of the horizontal plate to form a box type structure. The application can solve the cracking problem of the front cross beam in the front frame caused by welding seam defects and prolong the service life of the front cross beam.

Description

Technical Field

[0001] This application relates to the field of loader technology, and in particular to a front crossbeam structure, a loader front frame, and a loader. Background Technology

[0002] In related technologies, the left and right support plate assemblies in the front crossbeam are connected as one unit by a middle upper curved plate, which overlaps the lower curved plate. Simultaneously, an upper curved plate is welded to both sides to form the front crossbeam of the loader. In the loader's front frame, the front crossbeam is welded to the left and right wing boxes, and then the rear end plate is embedded in the rear of the front crossbeam and welded between the left and right wing boxes. Because the connection weld between the front crossbeam and the rear end plate is divided into three sections by the left and right support plate assemblies, a complete weld cannot be formed, making robotic welding impossible. If manual welding is used, the quality and strength of the weld on the front crossbeam cannot be guaranteed.

[0003] Furthermore, since the three upper curved plates in the front crossbeam are separated into a three-section structure by the left and right support plate assemblies, and the three upper curved plates are connected by welds, and the hinge point force of the front crossbeam is perpendicular to the connecting welds on the three upper curved plates in the front crossbeam, the shear force is mainly borne by the connecting welds. When the left and right wing boxes bear forces of different magnitudes and directions, the left and right wing boxes are prone to torsion, which in turn leads to the torsional deformation of the front crossbeam. Therefore, the front crossbeam is at risk of fatigue cracking during the operation of the loader, which requires extremely high quality welds. Summary of the Invention

[0004] This application proposes a front crossbeam structure, a loader front frame, and a loader, which can solve the cracking problem of the front crossbeam in the front frame caused by weld defects and extend the service life of the front crossbeam.

[0005] The first aspect of this application provides a front crossbeam structure, which includes a first bent plate, a second bent plate, a cross plate, a rear end plate, and two support plate assemblies. The two support plate assemblies are spaced apart in the left-right direction and are located above the cross plate. The first bent plate is welded between the two support plate assemblies. The second bent plate is located between the cross plate and the two support plate assemblies and is welded to the front end of the cross plate and the two support plate assemblies respectively. The rear end plate is welded to the rear end of the second bent plate and the rear end of the cross plate respectively to form a box-shaped structure.

[0006] The front crossbeam structure according to the first aspect of this application has at least the following beneficial effects: two support plate assemblies are welded together by a first bent plate and overlapped on a second bent plate by a welding process. At the same time, the second bent plate, the cross plate, and the rear end plate are welded together to form a box-shaped structure, which significantly improves the overall torsional resistance; a complete weld can be formed between the second bent plate and the rear end plate, which facilitates the use of a robot to complete the welding work between the second bent plate and the rear end plate and ensures good weld quality; the second bent plate is integral, and the hinge force borne by the front crossbeam structure can be directly transmitted to the second bent plate. The stress is borne by the second bent plate, which has higher reliability than the weld, effectively preventing the front crossbeam structure from easily twisting, deforming, and fatigue cracking during the operation of the loader, thereby improving the service life of the front crossbeam structure.

[0007] In some embodiments of this application, the second curved plate includes an inclined portion and a horizontal portion. The inclined portion is inclined downward and forward. The upper end of the inclined portion is integrally formed with the front end of the horizontal portion. The support plate assembly is respectively attached to the inclined portion and the horizontal portion and welded to the inclined portion and the horizontal portion respectively. The inclined portion is welded to the front end of the horizontal plate, and the rear end of the horizontal portion is welded to the rear sealing plate.

[0008] In some embodiments of this application, the rear sealing plate is arranged perpendicularly to the horizontal portion, and the rear sealing plate is arranged perpendicularly to the horizontal plate; And / or, the upper end of the rear sealing plate is higher than the horizontal portion, and the lower end of the rear sealing plate is lower than the horizontal plate; And / or, the rear ends of the two support plate assemblies are welded to the rear cover plate.

[0009] In some embodiments of this application, the front crossbeam structure further includes at least one partition plate, which is welded between the second curved plate and the cross plate, and also welded to the rear sealing plate, so as to divide the box-shaped structure into a plurality of cavities spaced apart in the left-right direction.

[0010] In some embodiments of this application, the front end of the partition plate is attached to the second bent plate and welded to the second bent plate.

[0011] A second aspect of this application provides a loader front frame, which includes wing boxes and a front crossbeam structure as described in the first aspect embodiment. Two wing boxes are provided and spaced apart in the left-right direction, and the front crossbeam structure is welded between the two wing boxes.

[0012] The loader front frame according to the second aspect of this application has at least the following beneficial effects: the loader front frame adopts the above-mentioned front crossbeam structure, so that the hinge point force on the front crossbeam structure can be directly transmitted to the second curved plate, and the second curved plate bears the stress. Moreover, the box-shaped structure formed by the second curved plate, the cross plate and the rear end plate enhances the overall torsional resistance. Therefore, when the loader's wing box is subjected to forces of different directions and magnitudes, the problem of fatigue cracking and short service life caused by the easy torsion deformation of the front crossbeam structure can be avoided, thereby ensuring the structural strength and stability of the loader's front frame.

[0013] In some embodiments of this application, the loader front frame further includes an axle assembly and two axle bends spaced apart in the left-right direction. The two axle bends are respectively arranged in a one-to-one correspondence with the two wing boxes, and the axle bends are welded to the lower part of the corresponding wing box. The bridge assembly includes a horizontal bending plate, a reinforcing rib plate, and two vertical plates. The two ends of the horizontal bending plate extending in the left-right direction are respectively welded to the front of the two bridge bending plates and respectively welded to the two wing boxes. The horizontal bending plate forms a downward-facing groove, which extends in the left-right direction to form two opening structures. The two vertical plates are respectively welded to the left and right ends of the horizontal bending plate and respectively welded to the two bridge bending plates. The two vertical plates are respectively arranged one-to-one with the two opening structures to seal the opening structures. On the side of the vertical plate away from the groove, at least one reinforcing rib plate is provided, which is arranged at intervals in the front-back direction. At least one reinforcing rib plate is respectively welded to the vertical plate, the horizontal bending plate, and the bridge bending plate.

[0014] In some embodiments of this application, the reinforcing rib plate is a right-angled triangle, and the left and right ends of the transverse bending plate are provided with two connecting portions spaced apart in the front-back direction. The two connecting portions are a right-angled triangle and are respectively located on the front and back sides of the reinforcing rib plate. The bridge bending plate is provided with a plurality of bridge bolt holes, and the plurality of bridge bolt holes are located between the two connecting portions. And / or, the front of the wing box is formed with an L-shaped first notch, which is adapted to the transverse bending plate so that the wing box is attached to and welded to the upper surface and rear side of the transverse bending plate; And / or, the loader front frame also includes a front window panel, which is welded between the two wing boxes and to the upper surface of the transverse bend.

[0015] In some embodiments of this application, the loader front frame further includes a first hinge assembly, a second hinge assembly, and two connecting plates spaced apart in the left-right direction. The first hinge assembly is located above the second hinge assembly and below the front crossbeam structure. Both the first hinge assembly and the second hinge assembly are welded between the two wing boxes. The two connecting plates are welded between the two wing boxes. The upper and lower ends of the connecting plates are respectively welded to the first hinge assembly and the second hinge assembly.

[0016] A third aspect of this application provides a loader that includes a loader front frame as described in the second aspect embodiment.

[0017] The loader according to the third aspect of the present application has at least the following beneficial effects: the loader front frame with the above-described structure can solve the problem of cracking of the front crossbeam in the traditional front frame due to weld defects between the three upper curved plates and the rear sealing plate, which helps to ensure the structural stability and reliability of the loader and reduce the number of maintenance times.

[0018] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description, claims and drawings. Attached Figure Description

[0019] Figure 1 This is a perspective view of the loader front frame provided according to an embodiment of this application; Figure 2 This is a three-dimensional schematic diagram of the front crossbeam structure provided according to an embodiment of this application; Figure 3 This is a perspective view of the loader front frame provided according to an embodiment of this application; Figure 4 This is a perspective view of a bridge assembly provided according to an embodiment of this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Second hinge assembly; 2. Connecting plate; 3. First hinge assembly; 4. Right wing box; 5. Left wing box; 6. Front crossbeam structure; 6-1. Horizontal plate; 6-2. Partition plate; 6-3. Rear sealing plate; 6-4. First curved plate; 6-5. Second curved plate; 6-6. Left support plate assembly; 6-7. Right support plate assembly; 7. Right bridge curved plate; 8. Front window plate; 9. Bridge assembly; 9-1. Horizontal curved plate; 9-2. Vertical plate; 9-3. Reinforcing rib plate; 10. Left bridge curved plate. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this application, unless otherwise stated, "several" means one or more, and "multiple" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] The front crossbeam in the loader's front frame is used to fix the bucket cylinder, and the structural strength of the front crossbeam affects the loader's service life. In related technologies, the left and right support plate assemblies in the front crossbeam are mainly composed of support plates and round welded together. The left and right support plate assemblies are connected as one unit by the middle upper curved plate, which is then placed on the lower curved plate. At the same time, upper curved plates are welded to the left and right sides to finally form the loader's front crossbeam. In the loader's front frame, the front crossbeam is welded to the left and right wing boxes, and finally the rear end plate is embedded in the rear position of the front crossbeam and welded between the left and right wing boxes.

[0025] There are two main welds connecting the front crossbeam and the rear end plate. One is located on the upper part of the front crossbeam, where the upper curved plate of the front crossbeam forms the weld with the rear end plate. The other is located on the lower part of the front crossbeam, where the lower curved plate of the front crossbeam forms the weld with the rear end plate. The weld between the front crossbeam and the rear end plate is divided into three sections by the left and right support plate assemblies of the front crossbeam, making it impossible to form a complete weld. This prevents the use of robotic arms for welding. Manual welding would compromise the quality and strength of the welds on the front crossbeam. Using a one-piece casting method would result in the following problems: high initial investment; heavy castings affecting the overall steering performance; poor overall rigidity if a hollow structure is used; defects such as porosity and slag inclusions in the castings, affecting service life; and difficulty in welding the castings to conventional plates such as wing boxes, resulting in poor fusion quality.

[0026] Meanwhile, because the three upper curved plates of the front crossbeam are separated by the left and right support plate assemblies to form a three-section structure, and the three upper curved plates are connected by welds, the hinge point force of the front crossbeam is set perpendicular to the connecting welds on the three upper curved plates in the front crossbeam. The shear force is mainly borne by the connecting welds. When the left and right wing boxes bear forces of different magnitudes and directions, the left and right wing boxes are prone to torsion, which in turn causes the entire front crossbeam to twist. Therefore, the front crossbeam is at risk of fatigue cracking during the operation of the loader, which places very high demands on the quality of the welds.

[0027] Moreover, compared to the middle curved plate and the left and right axle curved plates used to connect the left and right wing boxes, the axle bolts are suspended at the front end of the overall structure, resulting in a cantilever structure. This causes the stress borne by the axle bolts to be not transferred to the front frame as a whole, making the axle bolts prone to breakage and causing the axle curved plates to crack.

[0028] Therefore, there is an urgent need to develop a loader front frame that can solve the problems of fatigue cracking of the front crossbeam due to poor weld quality of the upper bending plate and cracking of the bridge bending plate due to broken bridge bolts.

[0029] The following is for reference. Figures 1 to 4 The present application describes a front crossbeam structure, a loader front frame, and a loader according to embodiments thereof.

[0030] like Figure 1 and Figure 2 As shown, the front crossbeam structure 6 according to the first aspect embodiment of this application can be applied to the front frame of a loader and connected to the bucket cylinder. The front crossbeam structure 6 of this embodiment employs a welding process with low initial investment costs, and is a hollow structure overall, possessing advantages such as high rigidity and strength, good manufacturing quality, and low weight. The front crossbeam structure 6 can be welded to the wing box in the front frame with high quality, and can solve the fatigue cracking problem caused by weld defects in the front crossbeam of the front frame in related technologies, thereby effectively extending the service life of the front crossbeam structure 6.

[0031] like Figure 2 As shown, the front crossbeam structure 6 includes a first curved plate 6-4, a second curved plate 6-5, a cross plate 6-1, a rear sealing plate 6-3, and two support plate assemblies. The two support plate assemblies are spaced apart in the left-right direction and are positioned above the cross plate 6-1. In this embodiment, the support plate assembly on the left is designated as the left support plate assembly 6-6, and the support plate assembly on the right is designated as the right support plate assembly 6-7. The left support plate assembly 6-6 and the right support plate assembly 6-7 are symmetrically arranged. It can be understood that the support plate assemblies are formed by welding support plates and circular welded components.

[0032] The first bent plate 6-4 is welded between the two support plate assemblies. In this embodiment, the first bent plate 6-4 can adopt a V-shaped or L-shaped structural design. The first bent plate 6-4 is formed by bending sheet metal. The outer corner of the first bent plate 6-4 faces upward, and the inner corner faces downward. The first bent plate 6-4 is located between the left support plate assembly 6-6 and the right support plate assembly 6-7. The left end of the first bent plate 6-4 is welded to the left support plate assembly 6-6, and the right end of the first bent plate 6-4 is welded to the right support plate assembly 6-7. The left support plate assembly 6-6 and the right support plate assembly 6-7 are symmetrically arranged about the first bent plate 6-4. The surface of the left support plate assembly 6-6 in the thickness direction is perpendicular to the surface of the first bent plate 6-4 in the thickness direction, and the surface of the right support plate assembly 6-7 in the thickness direction is perpendicular to the surface of the first bent plate 6-4 in the thickness direction.

[0033] The second curved plate 6-5 is disposed between the horizontal plate 6-1 and the two support plate assemblies, and is welded to the front end of the horizontal plate 6-1 and the two support plate assemblies respectively. In this embodiment, the second curved plate 6-5 can adopt a V-shaped or L-shaped structural design, with the outer corners of the second curved plate 6-5 facing upwards and the inner corners facing downwards. The left support plate assembly 6-6 and the right support plate assembly 6-7 are both disposed on the upper side of the second curved plate 6-5, overlapping the second curved plate 6-5 and being fixedly connected to the second curved plate 6-5 by welding. The first curved plate 6-4 is located at the middle position of the second curved plate 6-5 in the left-right direction, and further, the first curved plate 6-4 can be welded to the second curved plate 6-5. The surface of the left support plate assembly 6-6 in the thickness direction is perpendicular to the surface of the second curved plate 6-5 in the thickness direction, and the surface of the right support plate assembly 6-7 in the thickness direction is perpendicular to the surface of the second curved plate 6-5 in the thickness direction.

[0034] The horizontal plate 6-1 is horizontally positioned on the side of the second curved plate 6-5 furthest from the support plate assembly. In this embodiment, the surface of the left support plate assembly 6-6 in the thickness direction is perpendicular to the surface of the horizontal plate 6-1 in the thickness direction, and the surface of the right support plate assembly 6-7 in the thickness direction is perpendicular to the surface of the horizontal plate 6-1 in the thickness direction. The rear sealing plate 6-3 is located behind the first curved plate 6-4, the second curved plate 6-5, the horizontal plate 6-1, and the two support plate assemblies. The rear sealing plate 6-3 is attached to and welded to the rear ends of the second curved plate 6-5 and the horizontal plate 6-1, respectively, so that the second curved plate 6-5, the horizontal plate 6-1, and the rear sealing plate 6-3 together form a box-shaped structure. The box-shaped structure can be viewed from the left and right direction as a regular trapezoid, a right trapezoid, or an isosceles trapezoid.

[0035] In this embodiment, the second curved plate 6-5 includes an inclined portion and a horizontal portion. The inclined portion is arranged inclined downwards and forwards, located in front of the horizontal portion. The upper end of the inclined portion is integrally formed with the front end of the horizontal portion, meaning the second curved plate 6-5 is formed by bending sheet metal. Each support plate assembly is respectively attached to the inclined portion and the horizontal portion, and each support plate assembly is respectively welded to the inclined portion and the horizontal portion. That is, each support plate assembly has a second notch in the shape of a V or L, which is adapted to the outer corner position of the second curved plate 6-5. The horizontal plate 6-1 is located below the horizontal portion and on the side of the inclined portion closer to the rear sealing plate 6-3 in the front-back direction. The lower end of the inclined portion is lower than the horizontal plate 6-1. The rear sealing plate 6-3 is arranged perpendicular to the horizontal portion and perpendicular to the horizontal plate 6-1. The upper end of the rear sealing plate 6-3 is higher than the horizontal portion, and the lower end of the rear sealing plate 6-3 is lower than the horizontal plate 6-1. Of course, it is not excluded that the rear sealing plate 6-3 is arranged in an inclined manner.

[0036] The inclined part is attached to and welded to the front end of the horizontal plate 6-1. The rear end of the horizontal part and the rear end of the horizontal plate 6-1 are attached to and welded to the front side of the rear sealing plate 6-3, so that the horizontal part, the inclined part, the horizontal plate 6-1 and the rear sealing plate 6-3 together form a box-shaped structure. At the same time, the rear side of the inclined part, the lower surface of the horizontal part, the front side of the rear sealing plate 6-3 and the upper surface of the horizontal plate 6-1 together form a cavity that runs through the left and right directions.

[0037] In the front crossbeam structure 6 provided in the first aspect embodiment of this application, two support plate assemblies are welded together by a first bent plate 6-4 and overlapped onto a second bent plate 6-5 by a welding process. Simultaneously, the second bent plate 6-5, the cross plate 6-1, and the rear sealing plate 6-3 are welded together to form a box-shaped structure, significantly improving the overall torsional resistance. A complete weld can be formed between the second bent plate 6-5 and the rear sealing plate 6-3, facilitating the use of a robotic arm to complete the welding work between the second bent plate 6-5 and the rear sealing plate 6-3, and ensuring the second bent plate... The weld between plate 6-5 and rear sealing plate 6-3 is of good quality, and it eliminates the structural abrupt welding at the rear of the support plate assembly in related technologies, reducing the existence of welding defects. Moreover, the second bending plate 6-5 is an integral structure, and the hinge force borne by the front crossbeam structure 6 can be directly transferred to the second bending plate 6-5. The stress is borne by the second bending plate 6-5, which has higher reliability than the weld, effectively preventing the front crossbeam structure 6 from easily twisting, deforming, and fatigue cracking during the operation of the loader, thereby greatly improving the service life of the front crossbeam structure 6.

[0038] In some embodiments, the rear ends of the two support plate assemblies are welded to the rear end plate 6-3. It is understood that each support plate assembly extends rearward along the horizontal portion of the second curved plate 6-5 to the front side of the rear end plate 6-3, and is then fixedly connected to the front side of the rear end plate 6-3 by welding. The weld between the rear end plate 6-3 and the support plate assemblies effectively improves the reliability of the front crossbeam structure 6. Of course, it is not excluded that the support plate assemblies and the rear end plate 6-3 may be separately configured, that is, there may be a gap between the rear ends of the support plate assemblies and the front side of the rear end plate 6-3.

[0039] In some embodiments, the front crossbeam structure 6 further includes at least one partition 6-2, the partition 6-2 extending in the left-right direction in the thickness direction. At least one partition 6-2 is welded between the second curved plate 6-5 and the cross plate 6-1, and at least one partition 6-2 is welded to the rear sealing plate 6-3, thereby dividing the box-shaped structure into a plurality of cavities spaced apart in the left-right direction. Furthermore, the front end of the partition 6-2 is attached to the second curved plate 6-5, and the front end of the partition 6-2 is welded to the second curved plate 6-5.

[0040] In this embodiment, two partition plates 6-2 are provided, and each partition plate 6-2 is respectively arranged in a one-to-one correspondence with two support plate assemblies. The partition plates 6-2 and the corresponding support plate assemblies are arranged opposite each other in the vertical direction. By dividing the cavity of the box-shaped structure into multiple cavities through the partition plates 6-2, the rigidity and strength of the front crossbeam structure 6 can be improved.

[0041] like Figure 1 and Figure 2 As shown, the loader front frame according to the second aspect embodiment of this application can be applied to a loader. The loader front frame includes wing boxes and a front crossbeam structure 6 as described in the first aspect embodiment. Two wing boxes are provided, and the two wing boxes are spaced apart in the left-right direction. The front crossbeam structure 6 is welded between the two wing boxes.

[0042] In this embodiment, the wing box located on the left is designated as the left wing box 5, and the wing box located on the right is designated as the right wing box 4. The left wing box 5 is welded to the left end of the front crossbeam structure 6. Specifically, the left wing box 5 is welded to the left side of the second curved plate 6-5, the left side of the cross plate 6-1, and the left side of the rear sealing plate 6-3. The right wing box 4 is welded to the right end of the front crossbeam structure 6. Specifically, the right wing box 4 is welded to the right side of the second curved plate 6-5, the right side of the cross plate 6-1, and the right side of the rear sealing plate 6-3. The left wing box 5 and the right wing box 4 can be arranged symmetrically about the front crossbeam structure 6.

[0043] Understandably, the front frame of the loader adopts the aforementioned front crossbeam structure 6, which allows the hinge force on the front crossbeam structure 6 to be directly transmitted to the second curved plate 6-5, where the stress is borne by the second curved plate 6-5. Furthermore, the box-shaped structure formed by the second curved plate 6-5, the cross plate 6-1, and the rear sealing plate 6-3 enhances the overall torsional resistance. Therefore, when the loader's wing box is subjected to forces of different directions and magnitudes, the problem of fatigue cracking and short service life caused by the front crossbeam structure 6 being prone to torsional deformation can be avoided, thus ensuring the structural strength and stability of the loader's front frame.

[0044] In some embodiments, such as Figure 3 and Figure 4 As shown, the loader's front frame also includes an axle assembly 9 and two axle bends. The two axle bends are spaced apart in the left-right direction, and each axle bend corresponds to one of the two wing boxes. The axle bends are welded to the lower part of the corresponding wing box.

[0045] In this embodiment, the bridge bend plate located on the left side is designated as the left bridge bend plate 10, and the bridge bend plate located on the right side is designated as the right bridge bend plate 7. The left bridge bend plate 10 is located below the left wing box 5 and is attached to and welded to the left wing box 5. The right bridge bend plate 7 is located below the right wing box 4 and is attached to and welded to the right wing box 4.

[0046] like Figure 4 As shown, the bridge assembly 9 includes a horizontal bending plate 9-1, a reinforcing rib plate 9-3, and two vertical plates 9-2. The horizontal bending plate 9-1 extends horizontally, is positioned between the two bridge bending plates, and its two ends extending horizontally are welded to the front of the two bridge bending plates, respectively. Furthermore, the two ends extending horizontally are welded to two wing boxes. The horizontal bending plate 9-1 also has a downward-facing groove that extends horizontally, creating two openings. Specifically, the horizontal bending plate 9-1 can be formed by bending the front and rear ends of the plate downwards by 90°.

[0047] The vertical plate 9-2 extends in the left-right direction along its thickness. Two vertical plates 9-2 are respectively positioned to correspond one-to-one with the left and right ends of the horizontal curved plate 9-1. The two vertical plates 9-2 are welded to the left and right ends of the horizontal curved plate 9-1, and also to the two bridge curved plates. The two vertical plates 9-2 are respectively positioned to correspond one-to-one with two opening structures to seal the opening structures. In this embodiment, the vertical plate 9-2 is rectangular and adapted to the opening structure. The vertical plate 9-2 is placed inside the opening structure and adheres to the horizontal curved plate 9-1. The vertical plate 9-2 and the horizontal curved plate 9-1 are fixedly connected by welding.

[0048] The vertical plate 9-2 has at least one reinforcing rib 9-3 arranged at intervals along the front-to-back direction on the side away from the groove. The at least one reinforcing rib 9-3 is welded to the vertical plate 9-2, the horizontal bending plate 9-1, and the bridge bending plate, respectively. In this embodiment, each vertical plate 9-2 has one reinforcing rib 9-3, which is a right-angled triangle. The surface corresponding to the right-angle side of the reinforcing rib 9-3 is attached to and welded to the vertical plate 9-2, and the surface corresponding to the other right-angle side of the reinforcing rib 9-3 is attached to and welded to the bridge bending plate. The surface corresponding to the hypotenuse of the reinforcing rib 9-3 is a concave arc surface, and the upper end of the reinforcing rib 9-3 is attached to and welded to the horizontal bending plate 9-1.

[0049] Furthermore, the left and right ends of the transverse bending plate 9-1 form two connecting parts, which are spaced apart along the front-back direction. Both connecting parts are right-angled triangles and are located on the front and back sides of the reinforcing rib plate 9-3, respectively. The lower ends of the two connecting parts are attached and welded to the corresponding bridge bending plate. The bridge bending plate has multiple bridge bolt holes located between the two connecting parts. In this embodiment, two bridge bolt holes are provided between the reinforcing rib plate 9-3 and each connecting part, and the central axis of the bridge bolt holes extends along the vertical direction.

[0050] Understandably, in this embodiment, the bridge assembly 9 welds the transverse bending plate 9-1, the vertical plate 9-2, and the reinforcing rib plate 9-3 into a single unit. The bridge assembly 9 is subjected to continuous force from left to right, resulting in good overall torsional resistance and reducing the number of welds. When the loader's front axle travels on bumpy roads and is unevenly loaded, the resulting torsional force can be directly borne by the transverse bending plate 9-1, significantly improving the lifespan of the front frame. This effectively overcomes the problem in related technologies where the left and right bridge bending plates are connected to the reinforcing beams on the inner side of the front frame through welds, causing the force borne by the front frame to be directly transmitted to the weld, resulting in poor reliability. Furthermore, the force transmitted by the bridge bolts can be resisted by the bridge assembly 9.

[0051] In a preferred embodiment, such as Figure 3 and Figure 4 As shown, each wing box has an L-shaped first notch at the front, which is adapted to the transverse bending plate 9-1 so that the wing box is attached and welded to the upper surface and rear side of the transverse bending plate 9-1.

[0052] Understandably, the hinge point force (i.e., the load at the hinge point) of the front frame is transmitted to the front axle of the loader, and then from the front axle to the contact point between the tire and the ground, where it is balanced by the ground's supporting reaction force. In this embodiment, by setting a first notch, the wing box can press against the upper surface of the transverse bending plate 9-1, and the transverse bending plate 9-1 bears the stress, ensuring that the structural design of the front frame is reasonable and stable and reliable. When the loader travels on a bumpy road, the left and right loads transmitted to the front axle are unevenly distributed, i.e., an off-center load occurs. In this embodiment, the weld stress is converted into structural stress or plate stress. When the left and right axle bending plates are under off-center load, the stress is transmitted to the transverse bending plate 9-1, and the axle assembly 9 as a whole bears the load of the front axle, improving the force transmission path and significantly improving the reliability of the axle assembly 9.

[0053] In some embodiments, such as Figure 3 and Figure 4 As shown, the loader's front frame also includes a front window panel 8. The front window panel 8 is located between the two wing boxes and below the front crossbeam structure 6. The front window panel 8 is welded between the two wing boxes. In this embodiment, the left side of the front window panel 8 is attached to and welded to the right side of the left wing box 5, and the right side of the front window panel 8 is attached to and welded to the left side of the right wing box 4. Furthermore, the front window panel 8 is attached to and welded to the upper surface of the transverse curved plate 9-1, and simultaneously welded to the lower end of the second curved plate 6-5.

[0054] In some embodiments, such as Figure 1 As shown, the loader's front frame also includes a first articulation assembly 3, a second articulation assembly 1, and two connecting plates 2. The first articulation assembly 3 is positioned above the second articulation assembly 1 and below the front crossbeam structure 6. Both the first articulation assembly 3 and the second articulation assembly 1 are welded between the two wing boxes. The two connecting plates 2 are spaced apart in the left-right direction, located between the first articulation assembly 3 and the second articulation assembly 1, and welded between the two wing boxes. The upper and lower ends of the connecting plates 2 are respectively welded to the first articulation assembly 3 and the second articulation assembly 1.

[0055] Understandably, both the first hinge assembly 3 and the second hinge assembly 1 include plates with hinge holes, and can be adapted to the hinge shaft of the loader. Both the first hinge assembly 3 and the second hinge assembly 1 are welded and fixed to the connecting plates 2 on the left and right sides to form a T-shaped structure, which can resist the additional bending moment generated by the eccentric load of the wing box, resulting in better torsional resistance.

[0056] like Figures 1 to 4As shown, the assembly process of the loader front frame according to the second aspect embodiment of this application is as follows: The first step is the welding of the front crossbeam structure 6; the left support plate assembly 6-6 and the right support plate assembly 6-7 are welded together through the middle first curved plate 6-4, then the left support plate assembly 6-6 and the right support plate assembly 6-7 are abutted and welded to the second curved plate 6-5, then a partition 6-2 is added between the cross plate 6-1 and the second curved plate 6-5, and the partition 6-2 is fixedly connected to the cross plate 6-1 and the second curved plate 6-5 by welding, and finally the rear sealing plate 6-3 is welded to the second curved plate 6-5 and the cross plate 6-1, so that the left support plate assembly 6-6, the right support plate assembly 6-7, the first curved plate 6-4, the second curved plate 6-5, the cross plate 6-1, the partition 6-2 and the rear sealing plate 6-3 together form the front crossbeam structure 6.

[0057] The second step is the welding of bridge assembly 9; two vertical plates 9-2 are respectively embedded into the left and right sides of the horizontal bending plate 9-1, and the vertical plates 9-2 are fixed to the horizontal bending plate 9-1 by welding. Then, reinforcing ribs 9-3 are added to both sides of the horizontal bending plate 9-1, and the reinforcing ribs 9-3 are fixedly connected to the vertical plates 9-2 by welding, so that the horizontal bending plate 9-1, the vertical plates 9-2 and the reinforcing ribs 9-3 together form bridge assembly 9.

[0058] The third step is the welding of the loader's front frame; the left wing box 5 and the left axle bend plate 10 are welded into the left wing box assembly, and the right wing box 4 and the right axle bend plate 7 are welded into the right wing box assembly; then the left wing box assembly and the right wing box assembly are fitted and connected to the axle assembly 9 and welded; finally, the front crossbeam structure 6 and the front window panel 8 are welded between the left wing box assembly and the right wing box assembly respectively, so that the left wing box assembly, the right wing box assembly, the axle assembly 9, the front crossbeam structure 6 and the front window panel 8 together form the loader's front frame.

[0059] The loader front frame of this application can solve the problems in the related technology of cracking of the front crossbeam due to weld defects, cracking of the bridge plate due to broken bridge bolts, and cracking of the upper and lower hinge components due to poor torsional performance.

[0060] like Figures 1 to 4 As shown, the loader according to a third aspect embodiment of this application includes the loader front frame of the second aspect embodiment.

[0061] Understandably, loaders also include structural components such as the front axle and bucket cylinder, and the loader's front frame can be connected to the front axle and bucket cylinder. The loader's front frame with the aforementioned structure can solve the problem of cracking in traditional front frames caused by weld defects between the three upper curved plates and the rear end plate 6-3, helping to ensure the loader's structural stability and reliability, and reducing maintenance frequency.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A front crossbeam structure, characterized in that, The device includes a first curved plate, a second curved plate, a horizontal plate, a rear sealing plate, and two support plate assemblies. The two support plate assemblies are spaced apart in the left-right direction and are located above the horizontal plate. The first curved plate is welded between the two support plate assemblies. The second curved plate is located between the horizontal plate and the two support plate assemblies and is welded to the front end of the horizontal plate and the two support plate assemblies, respectively. The rear sealing plate is welded to the rear end of the second curved plate and the rear end of the horizontal plate, respectively, to form a box-shaped structure.

2. The front crossbeam structure according to claim 1, characterized in that, The second curved plate includes an inclined portion and a horizontal portion. The inclined portion is inclined downward and forward. The upper end of the inclined portion is integrally formed with the front end of the horizontal portion. The support plate assembly is respectively attached to the inclined portion and the horizontal portion and welded to the inclined portion and the horizontal portion respectively. The inclined portion is welded to the front end of the horizontal plate, and the rear end of the horizontal portion is welded to the rear sealing plate.

3. The front crossbeam structure according to claim 2, characterized in that, The rear sealing plate is arranged perpendicular to the horizontal part, and the rear sealing plate is arranged perpendicular to the horizontal plate; And / or, the upper end of the rear sealing plate is higher than the horizontal portion, and the lower end of the rear sealing plate is lower than the horizontal plate; And / or, the rear ends of the two support plate assemblies are welded to the rear cover plate.

4. The front crossbeam structure according to any one of claims 1 to 3, characterized in that, The front crossbeam structure also includes at least one partition plate, which is welded between the second curved plate and the cross plate, and welded to the rear sealing plate, so as to divide the box-shaped structure into multiple cavities spaced apart in the left-right direction.

5. The front crossbeam structure according to claim 4, characterized in that, The front end of the partition plate is attached to the second bent plate and welded to the second bent plate.

6. A loader front frame, characterized in that, It includes a wing box and a front crossbeam structure as described in any one of claims 1 to 5, wherein there are two wing boxes, which are spaced apart in the left-right direction, and the front crossbeam structure is welded between the two wing boxes.

7. The loader front frame according to claim 6, characterized in that, The loader front frame also includes an axle assembly and two axle bend plates spaced apart in the left-right direction. The two axle bend plates are respectively arranged in one-to-one correspondence with the two wing boxes, and the axle bend plates are welded to the lower part of the corresponding wing boxes. The bridge assembly includes a horizontal bending plate, a reinforcing rib plate, and two vertical plates. The two ends of the horizontal bending plate extending in the left-right direction are respectively welded to the front of the two bridge bending plates and respectively welded to the two wing boxes. The horizontal bending plate forms a downward-facing groove, which extends in the left-right direction to form two opening structures. The two vertical plates are respectively welded to the left and right ends of the horizontal bending plate and respectively welded to the two bridge bending plates. The two vertical plates are respectively arranged one-to-one with the two opening structures to seal the opening structures. On the side of the vertical plate away from the groove, at least one reinforcing rib plate is provided, which is arranged at intervals in the front-back direction. At least one reinforcing rib plate is respectively welded to the vertical plate, the horizontal bending plate, and the bridge bending plate.

8. The loader front frame according to claim 7, characterized in that, The reinforcing rib plate is in the shape of a right triangle. The left and right ends of the horizontal bending plate have two connecting parts that are spaced apart along the front and rear directions. The two connecting parts are in the shape of a right triangle and are located on the front and rear sides of the reinforcing rib plate, respectively. The bridge bending plate is provided with a plurality of bridge bolt holes, which are located between the two connecting parts. And / or, the front of the wing box is formed with an L-shaped first notch, which is adapted to the transverse bending plate so that the wing box is attached to and welded to the upper surface and rear side of the transverse bending plate; And / or, the loader front frame also includes a front window panel, which is welded between the two wing boxes and to the upper surface of the transverse bend.

9. The loader front frame according to claim 6, characterized in that, The loader front frame also includes a first hinge assembly, a second hinge assembly, and two connecting plates spaced apart in the left-right direction. The first hinge assembly is located above the second hinge assembly and below the front crossbeam structure. The first hinge assembly and the second hinge assembly are both welded between the two wing boxes. The two connecting plates are welded between the two wing boxes. The upper and lower ends of the connecting plates are respectively welded to the first hinge assembly and the second hinge assembly.

10. A loader, characterized in that, Includes the loader front frame as described in any one of claims 6 to 9.

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