A front frame structure and mine car

Abstract

This utility model relates to a front frame structure and a mine car, belonging to the field of vehicle frame structures. It includes a support frame, a crossbeam, and mounting seats. A support frame is mounted at each end of the crossbeam, and the mounting seats are mounted on the top of the support frames. The support frame includes a support plate, a mounting section, a top plate, and an inner vertical plate. The mounting seats are fixedly mounted on the upper part of the top plate, and one end of the crossbeam is fixedly connected to the end of the inner vertical plate away from the support frame. The mounting section includes a first mounting plate and a second mounting plate. The first mounting plate is fixedly connected to the support plate and is located at the top of the mounting opening of the support plate. The second mounting plate is fixedly connected to the support plate and is located on the side of the mounting opening of the support plate. This utility model simplifies and speeds up the loading and unloading of the front frame and the longitudinal beam, while improving the structural stability and reliability of the front frame.

Description

Technical Field

[0001] This utility model relates to the field of vehicle frame structures, and in particular to a front frame structure and a mining car. Background Technology

[0002] Mining dump trucks, as an important type of mining transportation equipment, operate for extended periods in harsh environments such as mining areas and mountainous regions, facing complex working conditions including rugged roads, steep slopes, and abundant sand and gravel. Under these high-load and high-impact operating conditions, the front frame, as the key load-bearing structure of the mining truck, directly affects the service life and operational safety of the entire vehicle due to its strength, reliability, and durability.

[0003] Currently, the front frame of mining dump trucks mainly adopts two structural forms: integral casting and single-plate box welding. However, both of these structures have obvious technical defects:

[0004] While integral cast front frame offers high structural strength, its manufacturing process is complex and costly, and its weight is significant, hindering the overall lightweight design of the mining truck. Furthermore, due to its unibody structure, any cracks or damage in a section often necessitate replacing the entire frame, resulting in high maintenance costs and long repair cycles, severely impacting the mine truck's uptime and economic efficiency.

[0005] While the single-plate box-type welded front frame reduces manufacturing costs to some extent, its construction using multiple welded steel plates results in dense weld lines and significant stress concentration issues. Under long-term high-load conditions, this can easily lead to weld cracking and structural deformation. This results in high and difficult subsequent inspection and maintenance costs, often requiring the replacement of the entire frame even for minor damage, severely impacting the vehicle's lifespan.

[0006] Regarding the aforementioned technologies, the two front-desk frame design methods mentioned above may lead to weld cracking and structural deformation after long-term or high-intensity use, resulting in high maintenance costs in the later stages. Utility Model Content

[0007] To address the problems of cracking and deformation in the front frame structure, this utility model provides a front frame structure and a mine car.

[0008] Firstly, this utility model provides a front frame structure, which adopts the following technical solution:

[0009] A front frame structure includes a support frame, a crossbeam, and a mounting base;

[0010] The support frame includes a support plate, a mounting part, a top plate and an inner vertical plate. The upper ends of the two support plates are fixedly connected through the top plate, and the same side of the two support plates is fixedly installed with the inner vertical plate.

[0011] The mounting base is fixedly installed on the upper end of the top plate; the two support frames are fixedly connected to both ends of the crossbeam through the inner vertical plate respectively;

[0012] The support plate has an installation opening at one end, the installation part is fixedly connected to the support plate, the installation part is located inside the installation opening, the installation opening is located below the inner upright plate, and the support frame is fixed to the longitudinal beam of the vehicle frame through the installation opening.

[0013] By adopting the above technical solution, the support frame, crossbeam, and mounting base are independently detachable and can be fixedly connected by bolts. In case of partial damage, only the damaged module needs to be replaced, reducing maintenance costs. The front frame is fixed to the upper flange and outer side of the longitudinal beam of the vehicle frame through the mounting section, achieving effective support for the front frame and reducing bolt damage due to shear force under load. This simplifies and expedites the assembly and disassembly of the front frame and the longitudinal beam, while improving the structural stability and reliability of the front frame. Furthermore, it reduces the number of splicing points and welds during the front frame assembly process, reduces the number of high-temperature treatment areas on the front frame, simplifies the welding process, improves welding efficiency, and reduces the risk of weld cracking.

[0014] Optionally, the mounting part includes a first mounting plate and a second mounting plate, the first mounting plate being fixedly connected to the support plate and located at the top of the mounting opening, and the second mounting plate being fixedly connected to the support plate and located on the side of the mounting opening.

[0015] By adopting the above technical solution, the first mounting plate and the second mounting plate respectively fix the front front frame to the upper wing surface and the outer side surface of the frame longitudinal beam, thereby achieving effective support for the front front frame, reducing the damage to the bolts due to shear force when bearing load, and making the loading and unloading between the front front frame and the longitudinal beam simple and quick, while improving the structural stability and reliability of the front front frame.

[0016] Optionally, the first mounting plate and the second mounting plate are integrally formed and fixedly connected, and the first mounting plate and the second mounting plate are set at a certain angle.

[0017] By adopting the above technical solution, the first mounting plate and the second mounting plate are integrally formed (e.g., by stamping or casting), eliminating weak points in the welding and preventing weld cracking at the connection of the frame longitudinal beams due to vibration. The fixed angle (e.g., 90°) between the first mounting plate and the second mounting plate fits snugly against the right-angle structure of the frame longitudinal beams, improving installation accuracy and contact area, and reducing stress concentration.

[0018] Optionally, the support plate further includes a first reinforcing rib plate, at least one of the first reinforcing rib plates being fixedly connected to two adjacent support plates.

[0019] By adopting the above technical solution, the first reinforcing rib plate connects the two side support plates laterally to form a closed frame, suppressing the torsional deformation of the platform under rugged road conditions. The first reinforcing rib plate evenly transmits concentrated loads (such as the impact of unloading from the mine bucket) to the entire support frame, reducing the risk of single-point fatigue.

[0020] Optionally, the mounting base includes a third mounting plate and a bent plate, the bottom end of the bent plate being fixedly connected to the upper end face of the top plate, and the third mounting plate being fixedly connected to the upper end face of the bent plate.

[0021] By adopting the above technical solutions, the bent plate uses geometric shapes to replace solid plates, such as U-shaped bends, reducing material usage while maintaining compressive strength. The bent structure has elastic deformation margin, which can absorb high-frequency vibrations during mine car travel and protect the equipment mounted on the mounting base.

[0022] Optionally, the inner upright plate extends into an extension along its length; the two ends of the bent plate are fixedly connected to the extension of the inner upright plate to form a box structure.

[0023] By adopting the above technical solution, the inner vertical plate extension is welded to the bending plate to form a closed box, which significantly improves the moment of inertia of its section. The box structure converts lateral loads (such as centrifugal force during turning) into shear stress, avoiding the fracture caused by the bending moment of the support plate.

[0024] Optionally, the mounting base further includes a second reinforcing rib plate, at least one of the second reinforcing rib plates having a first end fixedly connected to the third mounting plate and a second end fixedly connected to the extension or the bending plate.

[0025] By adopting the above technical solution, the second reinforcing rib plate locally reinforces the stress concentration areas of the box structure (such as the junction of the extension and the bending plate or the junction of the bending plate and the third mounting plate), preventing the initiation of high-cycle fatigue cracks and improving the resistance of the mounting base to longitudinal impact.

[0026] Optionally, the crossbeam includes a beam plate, the two ends of which are bent along the length direction of the inner vertical plate to form a connecting portion, and the beam plate is fixedly connected to the inner vertical plate through the connecting portion.

[0027] By adopting the above technical solution, the beam and slab are bent to form a connection that matches the contour of the inner vertical plate, increasing the contact area for connection and fixing, and reducing shear stress at this point. This avoids welding processes (such as bolted connections), thereby improving structural strength and reducing manufacturing costs.

[0028] Optionally, the crossbeam further includes a third reinforcing rib, at least one of which is fixedly connected to the beam and the connecting portion.

[0029] By adopting the above technical solution, the third reinforcing rib is arranged along the length of the crossbeam to improve its resistance to vertical bending, such as the sagging deformation under the gravity of a fully loaded ore bucket.

[0030] Secondly, this utility model provides a mining car, which adopts the following technical solution:

[0031] A mining car includes a front frame structure as described in the first aspect, and a frame longitudinal beam, the upper end face of which is fixedly connected to a first mounting plate, and the side end face of which is fixedly connected to a second mounting plate.

[0032] By adopting the above technical solution, the front frame is connected to the longitudinal beam of the frame in an L-shape, enabling the front frame connecting bolts to withstand axial force, improving connection reliability, and reducing the possibility of premature failure and fracture. The front frame is bolted to the upper flange and outer side of the longitudinal beam of the frame, reducing the possibility of bolt damage due to shear force under load, making the installation and removal of the front frame and the longitudinal beam simple and quick, while improving the structural stability and reliability of the front frame.

[0033] In summary, this utility model has at least one of the following beneficial technical effects:

[0034] 1. By setting up independent and detachable support frames, crossbeams, and mounting bases, which can be fixed with bolts, only the damaged module needs to be replaced in case of partial damage, reducing maintenance costs. The first and second mounting plates effectively support the front frame, reducing bolt damage due to shear force under load, and making the assembly and disassembly between the front frame and the longitudinal beams simple and quick, while improving the structural stability and reliability of the front frame.

[0035] 2. The extension of the inner vertical plate, the bent plate, the top plate, and the third mounting plate form a closed box with each other, which significantly increases the moment of inertia of the cross section. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0037] Figure 2 This is a schematic diagram showing one of the support plates hidden within the support frame;

[0038] Figure 3 This is a structural diagram of the mounting base and the crossbeam;

[0039] Figure 4 yes Figure 3 A diagram from another perspective.

[0040] Explanation of reference numerals in the attached drawings: 100, support frame; 110, support plate; 120, mounting part; 121, first mounting plate; 122, second mounting plate; 130, top plate; 140, inner vertical plate; 150, mounting opening; 160, first reinforcing rib plate; 170, extension part; 200, mounting base; 210, third mounting plate; 220, bent plate; 240, second reinforcing rib plate; 300, crossbeam; 310, beam plate; 320, connecting part; 330, third reinforcing rib plate; 400, mounting hole. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1 To be continued Figure 4 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0042] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0043] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0046] Example 1:

[0047] This utility model discloses a front frame structure and a mine car. (See attached diagram.) Figure 1 To be continued Figure 4 A front frame structure mainly includes a support frame 100, a crossbeam 300, and a mounting base 200. The support frame 100 includes a support plate 110, a mounting part 120, a top plate 130, and an inner vertical plate 140. The upper ends of the two support plates 110 are fixedly connected to each other through the top plate 130, and the same side of the two support plates 110 is fixedly installed to the inner vertical plate 140. The mounting base 200 is fixedly installed on the upper end of the top plate 130, and the two support frames 100 are respectively connected to the crossbeam 300 through the inner vertical plate 140. The two ends of 00 are fixedly connected; the bottom end of the support plate 110 near the end face of the inner vertical plate 140 is provided with an installation port 150; the mounting part 120 includes a first mounting plate 121 and a second mounting plate 122. The first mounting plate 121 is fixedly connected to the support plate 110 and is located at the top of the installation port 150 of the support plate 110. The second mounting plate 122 is fixedly connected to the support plate 110 and is located on the side of the installation port 150 of the support plate 110.

[0048] The support frame 100, crossbeam 300, and mounting base 200 are independently detachable and can be fixed together with bolts, breaking the limitations of traditional integrated structures. In case of partial damage, only the damaged module needs to be replaced, reducing maintenance costs. The front frame is fixed to the upper flange and outer side of the longitudinal beam of the frame by the first mounting plate 121 and the second mounting plate 122, respectively, to effectively support the front frame. This reduces the damage to the bolts due to shear force under load, and makes the assembly and disassembly of the front frame and the longitudinal beam simple and quick, while improving the structural stability and reliability of the front frame. At the same time, it reduces the number of splicing points and welds during the installation of the front frame, reduces the number of high-temperature treatment areas of the front frame, simplifies the welding process, improves welding efficiency, and reduces the risk of weld cracking.

[0049] See attached document Figure 1In some embodiments, the first mounting plate 121 and the second mounting plate 122 are integrally formed and fixedly connected, with the first mounting plate 121 and the second mounting plate 122 set at a certain angle. The integral forming of the first mounting plate 121 and the second mounting plate 122 (e.g., by stamping or casting) eliminates weak points in the welding, preventing weld cracking at the connection of the frame longitudinal beams due to vibration. The fixed angle (e.g., 90°) between the first mounting plate 121 and the second mounting plate 122 fits snugly against the right-angle structure of the frame longitudinal beams, improving installation accuracy and contact area, and reducing stress concentration.

[0050] See attached document Figure 1 In some embodiments, the support plate 110 further includes a first reinforcing rib plate 160, at least one of which is fixedly connected to two adjacent support plates 110. The first reinforcing rib plate 160 laterally connects the two support plates 110 to form a closed frame, suppressing the torsional deformation of the frame under rough road conditions. The first reinforcing rib plate evenly transmits concentrated loads (such as the impact of unloading from a mine bucket) to the entire support frame 100, reducing the risk of single-point fatigue.

[0051] See attached document Figure 1 In some embodiments, the mounting base 200 includes a third mounting plate 210 and a bent plate 220. The bottom end of the bent plate 220 is fixedly connected to the upper end face of the top plate 130, and the third mounting plate 210 is fixedly connected to the upper end face of the bent plate 220. The bent plate 220 uses geometric shapes, such as U-shaped bends, to replace solid sheet metal, reducing material usage while maintaining compressive strength. The bent structure has elastic deformation margin, which can absorb high-frequency vibrations during mine car travel and protect the equipment mounted on the mounting base 200.

[0052] See attached document Figure 2 In some embodiments, the inner upright plate 140 extends into an extension 170 along its length; the two end faces of the bent plate 220 are fixedly connected to the extension 170 of the inner upright plate 140, the third mounting plate 210 at the top of the bent plate 220, and the top plate 130 at the bottom of the bent plate 220 to form a box structure. The extension 170 of the inner upright plate 140 is welded to the bent plate 220 to form a closed box, which significantly increases the moment of inertia of its section. The box structure converts lateral loads (such as centrifugal force during turning) into shear stress, preventing the support plate 110 from breaking due to bending moment.

[0053] See attached document Figure 3In some embodiments, the mounting base 200 further includes a second reinforcing rib plate 240, at least one first end of which is fixedly connected to the third mounting plate 210, and the second end of which is fixedly connected to the extension 170 or the bent plate 220. The second reinforcing rib plate 240 locally reinforces the stress concentration areas of the box structure (such as the junction of the extension 170 and the bent plate 220 or the junction of the bent plate 220 and the third mounting plate 210) to prevent the initiation of high-cycle fatigue cracks and improve the resistance of the mounting base 200 to longitudinal impact.

[0054] See attached document Figure 3 In some embodiments, the crossbeam 300 includes a beam plate 310, the two ends of which are bent along the length of the inner vertical plate 140 to form connecting portions 320. The beam plate 310 is fixedly connected to the inner vertical plate 140 through the connecting portions 320. The bending of the beam plate 310 to form the connecting portion 320 that matches the contour of the inner vertical plate 140 increases the contact area for connection and fixation, and reduces shear stress at this point. This avoids welding processes (such as bolted connections), thereby improving structural strength and reducing manufacturing costs.

[0055] See attached document Figure 3 and attached Figure 4 In some embodiments, the crossbeam 300 further includes a third reinforcing rib 330, at least one of which is fixedly connected to the beam plate 310 and the connecting portion 320. The third reinforcing rib 330 can be selected to be fixed to the beam plate 310 and the connecting portion 320 according to design requirements. The third reinforcing rib 330 is arranged along the length of the crossbeam 300 to improve its resistance to vertical bending, such as sagging deformation under the gravity of a fully loaded mine bucket.

[0056] See attached document Figure 1 and attached Figure 4 In some embodiments, the support frame 100, the mounting base 200, and the crossbeam 300 are provided with multiple mounting holes 400. Providing mounting holes 400 in the support frame 100, the mounting base 200, or the crossbeam 300 facilitates subsequent bolt connection and fixation. Furthermore, providing mounting holes 400 of varying sizes offers assembly points while simultaneously achieving weight reduction.

[0057] See attached document Figure 1In some embodiments, an arc-shaped opening is provided at the end of the support plate 110 away from the inner vertical plate 140; a through-hole is provided on the support plate 110, and the through-hole can be selected to have an opening shape similar to that of the support plate 110 or other opening shapes according to design needs. The arc-shaped opening design at the end of the support plate 110 can eliminate stress concentration at traditional right angles or sharp corners, avoid crack initiation caused by long-term impact loads, and is particularly suitable for the dynamic stress requirements under bumpy road conditions in mining areas. By providing through-holes in non-critical stress areas of the support plate 110, local weight reduction can be achieved through topology optimization while maintaining overall bending stiffness, which is in line with the trend of lightweight mining trucks.

[0058] The implementation principle of a front frame structure according to an embodiment of this utility model is as follows:

[0059] By using independent, detachable bolt connections for the support frame 100, crossbeam 300, and mounting base 200, convenient replacement and low-cost maintenance are achieved in case of partial module damage. Simultaneously, the dual support of the front frame by the first mounting plate 121 and the second mounting plate 122 effectively distributes the load-bearing pressure, reduces the risk of bolt shear force damage, and ensures rapid assembly and disassembly performance and structural stability between the front frame and the longitudinal beam. The closed box structure formed by welding the extension 170 of the inner upright plate 140 to the bent plate 220 significantly increases the moment of inertia of the section and enhances the overall rigidity. Furthermore, by opening mounting holes 400 of varying sizes, lightweight design is achieved while meeting the needs of multiple assembly points, achieving an optimized balance between functionality and weight reduction.

[0060] Example 2:

[0061] This utility model discloses a mining car. (See attached diagram.) Figure 1 A mining car mainly includes a front frame structure as in Embodiment 1, and a frame longitudinal beam, the upper end face of which is fixedly connected to a first mounting plate 121, and the side end face of which is fixedly connected to a second mounting plate 122.

[0062] The implementation principle of the front frame structure and mine car in this embodiment of the utility model is as follows:

[0063] By adopting the above technical solution, the mounting part 120 at the lower end of the front frame is connected to the longitudinal beam of the vehicle frame, enabling the front frame connecting bolts to withstand axial force, improving connection reliability, and reducing the possibility of premature failure and breakage. The front frame is connected to the upper flange and outer side of the longitudinal beam of the vehicle frame by bolts or welding through the first mounting plate 121 and the second mounting plate 122, reducing the possibility of bolt damage due to shear force under load, realizing convenient and quick assembly and disassembly between the front frame and the longitudinal beam, and improving the structural stability and reliability of the front frame.

[0064] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A front frame structure, characterized in that: Includes a support frame (100), a crossbeam (300), and a mounting base (200); The support frame (100) includes a support plate (110), a mounting part (120), a top plate (130), and an inner vertical plate (140). The upper surfaces of the two support plates (110) are fixedly connected through the top plate (130), and the same side of the two support plates (110) is fixedly installed with the inner vertical plate (140). The mounting base (200) is fixedly installed on the upper end of the top plate (130); the two support frames (100) are fixedly connected to both ends of the crossbeam (300) through the inner upright plate (140); The support plate (110) has an installation opening (150) at one end. The installation part (120) is fixedly connected to the support plate (110). The installation part (120) is located inside the installation opening (150). The installation opening (150) is located below the inner upright plate (140). The support frame (100) is fixed to the longitudinal beam of the frame through the installation opening (150).

2. The front frame structure according to claim 1, characterized in that: The mounting part (120) includes a first mounting plate (121) and a second mounting plate (122). The first mounting plate (121) is fixedly connected to the support plate (110) and is located at the top of the mounting opening (150). The second mounting plate (122) is fixedly connected to the support plate (110) and is located on the side of the mounting opening (150).

3. The front frame structure according to claim 2, characterized in that: The first mounting plate (121) and the second mounting plate (122) are integrally formed and fixedly connected, and the first mounting plate (121) and the second mounting plate (122) are set at a certain angle.

4. The front frame structure according to claim 1, characterized in that: The support plate (110) further includes a first reinforcing rib plate (160), at least one of the first reinforcing rib plates (160) being fixedly connected to two adjacent support plates (110).

5. The front frame structure according to any one of claims 1-4, characterized in that: The mounting base (200) includes a third mounting plate (210) and a bending plate (220). The bottom end of the bending plate (220) is fixedly connected to the upper end face of the top plate (130), and the third mounting plate (210) is fixedly connected to the upper end face of the bending plate (220).

6. The front frame structure according to claim 5, characterized in that: The inner upright plate (140) extends into an extension (170) along its length; the two ends of the bent plate (220) are fixedly connected to the extension (170) to form a box structure.

7. The front frame structure according to claim 6, characterized in that: The mounting base (200) further includes a second reinforcing rib plate (240), at least one of the second reinforcing rib plates (240) having a first end fixedly connected to the third mounting plate (210) and a second end fixedly connected to the extension (170) or the bending plate (220).

8. The front frame structure according to any one of claims 1-4, characterized in that: The crossbeam (300) includes a beam plate (310), and the two ends of the beam plate (310) are bent along the length direction of the inner vertical plate (140) to form a connecting part (320). The beam plate (310) is fixedly connected to the inner vertical plate (140) through the connecting part (320).

9. The front frame structure according to claim 8, characterized in that: The crossbeam (300) also includes a third reinforcing rib (330), at least one of the third reinforcing ribs (330) being fixedly connected to the beam plate (310) and the connecting part (320).

10. A mining car, characterized in that: It includes the front frame structure as described in claim 2, and includes a frame longitudinal beam, the upper end face of which is fixedly connected to the first mounting plate (121), and the side end face of which is fixedly connected to the second mounting plate (122).

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