A lower portal structure and a dump truck

Abstract

The utility model provides a kind of lower portal girder structure and dump truck, the lower portal girder structure includes two installation bottom plates for being connected with dump truck, bending plate being connected between two installation bottom plates and two parallelly arranged connecting rib plates being connected between two installation bottom plates;Connecting rib plate is arranged in the plane perpendicular to installation bottom plate and bending plate, and the inner side of two connecting rib plates is connected with bending plate;The lower portal girder structure further includes two support rib plates being connected between two connecting rib plates, and bending plate is arranged between two support rib plates.The lower portal girder structure is simultaneously fastened connection using connecting rib plate and support rib plate, sufficiently improve the strength of lower portal girder structure, and reduce the risk of weld and base material fracture.Installation bottom plate, bending plate and connecting rib plate, support rib plate are connected by welding as a whole, are connected by the method of welding, reduce the use of fastener, reduce the risk of connecting fastener fracture.

Description

Technical Field

[0001] This utility model relates to the field of mining machinery, and in particular to a lower gantry beam structure and a dump truck having the upper gantry beam structure. Background Technology

[0002] Due to the harsh mining environment, mining dump trucks experience significant alternating loads on their chassis and systems during operation, especially during turning. The lower gantry beam not only needs to bear and transfer loads and enhance chassis rigidity, but also supports and connects critical systems of the dump truck, improving its stability and adaptability. Therefore, the stability and durability of the lower gantry beam structure are particularly important. Currently, most lower gantry beams in mining dump trucks are connected using fasteners, which makes the fasteners prone to breakage under stress and the welds prone to cracking. Furthermore, these lower gantry beams are structurally weak and prone to fracture at bends. Therefore, this design proposes a lower gantry beam structure that can solve the above problems. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a lower gantry beam structure and a dump truck, which can improve the stability and strength of the lower gantry beam and reduce the risk of fastener breakage.

[0004] One embodiment of this utility model provides a lower gantry beam structure for a mining dump truck, comprising two mounting base plates for connecting to the dump truck, a bent plate connected between the two mounting base plates, and two parallel connecting stiffeners connected between the two mounting base plates; the connecting stiffeners are arranged in a plane perpendicular to both the mounting base plates and the bent plate, and the inner sides of both connecting stiffeners are connected to the bent plate; the lower gantry beam structure also includes two supporting stiffeners connected between the two connecting stiffeners, and the bent plate is arranged between the two supporting stiffeners; the mounting base plates, bent plates, connecting stiffeners, and supporting stiffeners are welded together as a whole.

[0005] Furthermore, a clearance hole is provided in the middle of the bent plate to avoid the front cross brace of the dump truck, and the length direction of the clearance hole is parallel to the connecting stiffener.

[0006] Furthermore, the bottom of the support rib is connected to the mounting base plate, and the top is formed with a clearance groove for avoiding the front crossbar of the dump truck, with the clearance groove aligned with the clearance hole.

[0007] Furthermore, a pin hole is provided on the connecting stiffener plate, and the pin hole is located between the bending plate and the supporting stiffener plate along the length direction of the supporting stiffener plate.

[0008] Furthermore, the connecting stiffener also has an inner adjusting ring protruding around the edge of the pin hole for adjusting the gap between the front crossbar of the dump truck and the connecting stiffener, and the inner adjusting ring is set between the two connecting stiffeners.

[0009] Furthermore, the connecting stiffener also includes an outer adjusting ring protruding around the edge of the pin hole, the outer adjusting ring being located on the outer side of the connecting stiffener.

[0010] Furthermore, the connecting stiffener also includes a locking block nut seat, which is located on the outside of the connecting stiffener and between the outer adjusting ring and the mounting base plate.

[0011] Another embodiment of this utility model provides a dump truck, which includes a frame longitudinal beam and the aforementioned lower gantry beam structure, wherein the mounting base plate of the lower gantry beam structure is fixedly connected to the frame longitudinal beam.

[0012] Furthermore, the connecting stiffener also includes a locking block nut seat, and the dump truck also includes a front crossbar, which includes a rod head and a front crossbar bushing. An inner adjusting ring is used to adjust the gap between the rod head, the front crossbar bushing and the connecting stiffener.

[0013] Furthermore, the front tie rod also includes a pin, and an outer adjusting ring is used to adjust the extension of the pin. The pin passes through the pin hole of the connecting rib and the outer adjusting ring, and is locked to the locking block nut seat.

[0014] This utility model provides a lower gantry beam structure, including two mounting base plates, a bent plate connecting the mounting base plates, a connecting stiffener between the two mounting base plates, and a supporting stiffener connecting the two connecting stiffeners. This design simultaneously uses connecting stiffeners and supporting stiffeners to securely connect the lower gantry beam structure, significantly improving its strength and reducing the risk of weld and base material fracture. The mounting base plates, bent plate, connecting stiffeners, and supporting stiffeners are directly connected by welding, reducing the use of fasteners and lowering the risk of fastener breakage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a first-view schematic diagram of the lower gantry beam structure provided for a preferred embodiment of the present invention.

[0017] Figure 2 for Figure 1 A second-view schematic diagram of the lower gantry beam structure is provided.

[0018] Figure 3 for Figure 1 A third-view schematic diagram of the lower gantry beam structure is provided.

[0019] Figure 4 For having Figure 1 A schematic diagram showing the connection between the lower gantry beam structure and the front crossbar of the dump truck.

[0020] Figure 5 For having Figure 1 A schematic diagram showing the connection between the lower gantry beam structure and the front crossbar head of the dump truck.

[0021] Figure 6 For having Figure 1 The provided structural diagram shows the structure of the dump truck with the lower gantry beam.

[0022] In the diagram: Lower gantry beam structure 1; mounting base plate 11; bending plate 12; clearance hole 120; connecting stiffener 13; pin hole 130; inner adjusting ring 131; outer adjusting ring 132; locking block nut seat 133; supporting stiffener 14; clearance groove 140; front cross tie rod 2; rod head 21; bushing 22; pin shaft 23; frame longitudinal beam 3; suspension cylinder mounting seat 4; reinforcing plate structure 5; upper gantry beam structure 6. Detailed Implementation

[0023] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0024] like Figures 1 to 3 As shown, one embodiment of this application provides a lower gantry beam structure 1 for a mining dump truck, including two mounting base plates 11, a bent plate 12, and two parallel connecting stiffeners 13. The mounting base plates 11 are used to connect to the longitudinal beams 3 of the dump truck frame. The mounting base plates 11 are preferably square plates, with mounting holes at each of their four corners for connection to the longitudinal beams 3. The bent plate 12 is connected between the two mounting base plates 11, and to avoid the dump truck's gearbox, its two ends are bent into curved surfaces, with 3-5 bends, preferably 4 bends. An avoidance hole 120 is provided in the middle of the bent plate 12 to avoid the dump truck's front crossbar 2; its length direction is parallel to the direction of the connecting stiffeners 13. The connecting stiffener 13 is also connected between the two mounting base plates 11. The connecting stiffener 13 is also arranged in a plane that is perpendicular to both the mounting base plate 1 and the bending plate 12, and the inner sides of both connecting stiffeners 13 are connected to the bending plate 12.

[0025] The lower gantry beam structure 1 also includes two supporting stiffeners 14, which are connected between two connecting stiffeners 13. A bent plate 12 is arranged between the two supporting stiffeners 14. The bottom of the supporting stiffeners 14 is connected to the mounting base plate 11, and the top has a clearance groove 140. The clearance groove 140 is also used to avoid the front crossbar 2 of the dump truck, and the clearance groove 140 is aligned with the clearance hole 120. By using multiple connecting stiffeners 13 and supporting stiffeners 14 to fasten the lower gantry beam structure 1, the overall structural strength is improved, and the risk of weld and base material fracture is reduced. In addition, the mounting base plate 11, bent plate 12, connecting stiffeners 13, and supporting stiffeners 14 are connected in pairs by welding to form a whole. The welding method reduces the use of fasteners and lowers the risk of fastener fracture.

[0026] like Figure 5 As shown, a pin hole 130 is provided on the connecting stiffener 13. The pin 23 of the front crossbar 2 of the dump truck passes through the pin hole 130, rotatably connecting the front crossbar 2 to the connecting stiffener 13. The pin hole 130 is located between the bending plate 12 and the supporting stiffener 14, and is along the length of the supporting stiffener 14. An inner adjusting ring 131 and an outer adjusting ring 132 are also formed on the connecting stiffener 13. The inner adjusting ring 131 is used to adjust the gap between the front crossbar 2 of the dump truck and the connecting stiffener 13, and the thickness of the inner adjusting ring 131 is determined according to the thickness of the rod head 21 of the front crossbar 2 of the dump truck and the number and thickness of the bushings 22 matched with the rod head 21. The inner adjusting ring 131 protrudes around the edge of the pin hole 130 on the opposite side of the two connecting stiffeners 13. During installation, it separates the connecting stiffeners 13 from the front crossbar 2. The distance between the connecting stiffeners 13 and the front crossbar 2 can be set by changing its radial thickness during manufacturing, ensuring that the gap between the front crossbar 2 and the connecting stiffeners 13 meets the standard and can be applied to different specifications and environments.

[0027] Similarly, the outer adjusting ring 132 protrudes from the edge of the pin hole 130 on the outside of the connecting stiffener 13. Its thickness is determined according to the length of the pin 23. When the pin 23 is installed, it passes through the pin hole 130 of the connecting stiffener 13 and the outer adjusting ring 132. Therefore, the extension length of the pin 23 can be adapted to the connecting stiffener 13 by changing the radial thickness of the outer adjusting ring 132 during manufacturing. This ensures that the extension of the pin 23 meets the requirements and can be applied to different specifications of pins 23 and working environments.

[0028] A locking nut seat 133 is also formed on the connecting stiffener 13. The locking nut seat 133 is located on the outside of the connecting stiffener 13 and between the outer adjusting ring 132 and the mounting base plate 11, and is used to restrict the rotation of the pin 23. The locking nut seat 133 includes two limiting blocks. One end of the limiting block is connected to the connecting stiffener 13. A limiting groove is formed between the two limiting blocks. The pin 23 of the front crossbar 2 of the dump truck passes through the pin hole 130 and the outer adjusting ring 132. The pressure plate of the pin 23 is embedded in the limiting groove. The cover plate and fasteners are connected to the locking nut seat 133 to lock the pin 23.

[0029] In summary, the lower gantry beam structure 1 provided by the above embodiments of this utility model, used in mining dump trucks, includes two mounting base plates 11, a bent plate 12 connecting the mounting base plates 11, connecting stiffeners 13 connecting the two mounting base plates 11, and supporting stiffeners 14 connecting the two connecting stiffeners 13. The connecting stiffeners 13 and supporting stiffeners 14 are used to securely connect the lower gantry beam structure 1, significantly improving its strength and reducing the risk of weld and base material fracture. The mounting base plates 11, bent plate 12, connecting stiffeners 13, and supporting stiffeners 14 are directly connected by welding, reducing the use of fasteners and lowering the risk of fastener breakage.

[0030] like Figure 4 As shown, another embodiment of this utility model provides a dump truck, including a front crossbar 2 and the aforementioned lower gantry beam structure 1. The front crossbar 2 includes a rod head 21, a bushing 22, and a pin 23. The bushing 22 is disposed inside the rod head 21, and the pin 23 is inserted into the rod head 21. The rod head 21 is connected to the pin 23 through the bushing 22. One end of the front crossbar 2, the rod head 21, is rotatably connected to the connecting rib plate 13 through the pin 23. Therefore, the supporting rib plate 14 located at one end of the pin hole 130 needs to have a clearance groove 140 to avoid the rod head 21 of the front crossbar 2. The other end of the front crossbar 2 is not fixed to the connecting rib plate 3. The front crossbar 2 swings up and down around the pin 23. Therefore, the bending plate 12 and the other supporting rib plate 14 need to have clearance holes 120 and clearance grooves 140 to avoid the front crossbar 2.

[0031] like Figure 5As shown, the inner adjusting ring 131 matches the front tie rod 2 and contacts the rod head 21 and bushing 22. Its thickness is controlled by the thickness of the rod head 21 and the number and thickness of the bushings 22. During installation, the distance between the connecting rib plate 13 and the rod head 21 and bushing 22 can be adjusted by using inner adjusting rings 131 with different radial thicknesses, thereby ensuring that the gap between the three meets the standard. The outer adjusting ring 132 is set at both ends of the pin 23. Its thickness is determined according to the length of the pin 23. The extension length of the pin 23 can be adjusted by using outer adjusting rings 132 with different thicknesses to ensure that the extension of the pin 23 meets the requirements. The pin 23 can pass through the outer adjusting ring 132, pin hole 130, inner adjusting ring 131, rod head 21, inner adjusting ring 131, pin hole 130, and outer adjusting ring 132 in sequence, and is finally locked by the locking block nut seat 133.

[0032] like Figure 6 As shown, the dump truck further includes a frame longitudinal beam 3, a suspension cylinder mounting seat 4, a reinforcing plate structure 5, and an upper gantry beam structure 6. Both ends of the lower gantry beam structure 1 are connected to the two frame longitudinal beams 3 respectively through mounting holes in the mounting base plate 1. The inner sides of the two frame longitudinal beams 3 are provided with reinforcing plate structures 5, and the outer sides are provided with suspension cylinder mounting seats 4. The top of the suspension cylinder mounting seats 4 is provided with the upper gantry beam structure 6, and both ends of the upper gantry beam structure 6 are connected to different suspension cylinder mounting seats 4 for connecting the two suspension cylinder mounting seats 4. There are two frame longitudinal beams 3, two suspension cylinder mounting seats 4, and two reinforcing plate structures 5, which are connected together through the lower gantry beam structure 1 and the upper gantry beam structure 6 to form a closed ring beam structure. The increased installation space inside the lower gantry beam structure 1 facilitates the connection of various structures using riveting methods, and also facilitates the assembly and disassembly of the various structures.

[0033] In summary, another embodiment of this utility model provides a dump truck, including a front crossbar 2, a frame longitudinal beam 3, and the aforementioned lower gantry beam structure 1. The head 21 of the front crossbar 2 is connected to the connecting stiffener 13 of the lower gantry beam structure 1 via a pin 23. The mounting base 1 of the lower gantry beam structure 1 is fixedly connected to the frame longitudinal beam 3 of the dump truck. The increased internal mounting space of the lower gantry beam structure 1 facilitates the connection of various structures of the dump truck using riveting methods, and also facilitates the assembly and disassembly of the dump truck components.

[0034] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A lower gantry beam structure for use in mining dump trucks, characterized in that, The system includes two mounting base plates for connection to a dump truck, a bent plate connected between the two mounting base plates, and two parallel connecting stiffeners connected between the two mounting base plates. The connecting stiffeners are arranged in a plane perpendicular to both the mounting base plates and the bent plate, and the inner sides of both connecting stiffeners are connected to the bent plate. The lower gantry beam structure also includes two supporting stiffeners connected between the two connecting stiffeners, and the bent plate is arranged between the two supporting stiffeners. The mounting base plates, the bent plates, the connecting stiffeners, and the supporting stiffeners are welded together as a single unit.

2. The lower gantry beam structure as described in claim 1, characterized in that, The bending plate has a clearance hole in the middle for avoiding the front crossbar of a dump truck, and the length direction of the clearance hole is parallel to the connecting stiffener.

3. The lower gantry beam structure as described in claim 2, characterized in that, The bottom of the support rib is connected to the mounting base plate, and the top is formed with a clearance groove for avoiding the front crossbar of a dump truck. The clearance groove is aligned with the clearance hole.

4. The lower gantry beam structure as described in claim 1, characterized in that, The connecting stiffener plate has a pin hole, which is located between the bending plate and the supporting stiffener plate along the length of the supporting stiffener plate.

5. The lower gantry beam structure as described in claim 4, characterized in that, The connecting stiffener plate also has an inner adjusting ring protruding around the edge of the pin hole for adjusting the gap between the front crossbar of the dump truck and the connecting stiffener plate, and the inner adjusting ring is disposed between the two connecting stiffener plates.

6. The lower gantry beam structure as described in claim 5, characterized in that, The connecting stiffener also includes an outer adjusting ring protruding around the edge of the pin hole, the outer adjusting ring being disposed on the outer side of the connecting stiffener.

7. The lower gantry beam structure as described in claim 6, characterized in that, The connecting stiffener plate also includes a locking block nut seat, which is disposed on the outside of the connecting stiffener plate and located between the outer adjusting ring and the mounting base plate.

8. A dump truck, characterized in that, It includes a frame longitudinal beam and a lower gantry beam structure as described in any one of claims 1-7, wherein the mounting base plate of the lower gantry beam structure is fixedly connected to the frame longitudinal beam.

9. The dump truck as described in claim 8, characterized in that, The connecting stiffener plate also includes a locking block nut seat and an inner adjusting ring. The dump truck also includes a front crossbar, which includes a rod head and a front crossbar bushing. The inner adjusting ring is used to adjust the gap between the rod head, the front crossbar bushing and the connecting stiffener plate.

10. The dump truck as described in claim 9, characterized in that, The connecting stiffener also includes a pin hole and an outer adjusting ring, and the front cross tie rod also includes a pin shaft. The outer adjusting ring is used to adjust the extension amount of the pin shaft. The pin shaft passes through the pin hole of the connecting stiffener and the outer adjusting ring and is locked to the locking block nut seat.

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