A mine rigid frame and mine car

Abstract

The utility model discloses a kind of mining rigid frame and mine car, comprising: stringer, two the stringer is symmetrically arranged, every stringer is detachably installed with first gusset plate by first connecting piece;Crossbeam, multiple the crossbeam is arranged between two stringers along the length direction interval of stringer, the both ends of the crossbeam are detachably installed with connecting plate by second connecting piece respectively, the end of the connecting plate away from crossbeam is welded with first gusset plate fixedly.The utility model can avoid the frame cracking hidden danger caused by stringer and crossbeam welding connection, improve the load stability and service life of frame under harsh working conditions.

Description

Technical Field

[0001] This utility model relates to a rigid mining frame and a mining car, belonging to the field of mining car frames. Background Technology

[0002] Currently, mining vehicle frames are mainly divided into two categories: rigid welded frames and riveted frames. Rigid welded frames are mostly used in large dual-axle mining vehicles, while riveted frames are mainly suitable for three-axle mining vehicles with a capacity of ≤150 tons.

[0003] The rigid welded frame used in existing three-axle mining vehicles has the following structure: Figure 1 As shown, the crossbeam 1 and longitudinal beam 2 are directly welded together, or welded and fixed together via connecting plates. This structure has significant technical defects under harsh road conditions: during vehicle operation, the crossbeams must continuously bear the loads generated by the torsion and bending of the frame, and stress concentration points easily form at the welded joints between the crossbeams and longitudinal beams; as the number of operating cycles increases, these stress concentration areas are prone to fatigue damage, leading to cracking of the longitudinal beams, and in severe cases, even complete tearing of the longitudinal beams, directly causing vehicle downtime. Furthermore, the repair of such welded parts is difficult and costly, becoming a core technical pain point for the rigid welded frame of the three-axle mining vehicle. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model provides a rigid mining frame and mining car, which avoids the risk of frame cracking caused by welding connections between longitudinal beams and cross beams, and improves the load-bearing stability and service life of the frame under harsh working conditions.

[0005] To achieve the above objectives, this utility model employs a rigid mining vehicle frame, comprising: The longitudinal beams are arranged symmetrically, and each longitudinal beam is detachably mounted with a first pad through a first connector. A plurality of crossbeams are arranged at intervals between two longitudinal beams along the length of the longitudinal beams. Each end of the crossbeam is detachably fitted with a connecting plate via a second connector. The end of the connecting plate away from the crossbeam is welded and fixed to a first pad.

[0006] As an improvement, the connecting plate is L-shaped and includes an integrally formed vertical plate and a horizontal plate. The vertical plate is welded and fixed to the first pad plate, and the horizontal plate is detachably fixed to the crossbeam by a second connector after being attached to it.

[0007] As an improvement, both the first and second connectors are bolts and matching nuts.

[0008] As an improvement, both the vertical plate and the first pad are provided with plug welding holes.

[0009] As an improvement, the longitudinal beam includes a U-shaped outer beam plate and an inner beam plate. The inner beam plate is fixedly installed on the open side of the U-shaped outer beam plate, and the two together enclose a closed frame structure. A second pad and a first pad are respectively attached to both sides of the inner beam plate, and the first pad and the second pad are fixed through the same set of first connectors.

[0010] As an improvement, both the first and second pads are made of high-strength alloy steel plates, and the mating surfaces of the pads and the longitudinal beams are provided with anti-slip textures.

[0011] As an improvement, L-shaped reinforcing plates are welded to the inner sides of both bends of the U-shaped outer beam plate.

[0012] In a second aspect, this utility model also provides a mining car, on which the aforementioned rigid mining frame is installed.

[0013] Compared with the prior art, the rigid mining vehicle frame of this utility model has the following advantages: 1. Mitigating the risk of frame cracking and improving structural reliability. The indirect connection between the longitudinal and transverse beams is achieved through a first pad. The torsional and bending loads borne by the transverse beams are first transferred to the connecting plate and the first pad, and then dispersed to the longitudinal beams through the first connector. This avoids the stress concentration problem at the weld seams caused by direct welding between the transverse and longitudinal beams in traditional technologies. Furthermore, welding only occurs between the connecting plate and the first pad, far from the core load-bearing area of ​​the longitudinal beams, completely eliminating the risk of longitudinal beam cracking and overall tearing caused by weld fatigue damage. This significantly improves the service life and operational stability of the frame under harsh mining conditions.

[0014] 2. Modular and detachable maintenance reduces operating costs. The longitudinal beams and the first pad are detachably connected via the first connector, and the crossbeams and the connecting plate are detachably connected via the second connector, forming a modular assembly structure. When a crossbeam, connecting plate, or first pad is damaged, the entire frame does not need to be disassembled; only the corresponding connector needs to be removed to replace the damaged part individually. This avoids the drawback of traditional welded frames where damage to one part requires overall repair, significantly reducing downtime and lowering maintenance difficulty and overall operating costs.

[0015] 3. More uniform load transfer, adapting to the heavy-duty requirements of mining. The first pad not only serves as a connecting transition but also expands the contact area of ​​the longitudinal beams, allowing the load transmitted by the crossbeams to be evenly distributed to the longitudinal beams through the pad, avoiding component deformation caused by excessive local stress. At the same time, the adjustability of the bolted structure ensures assembly accuracy, making each component fit tightly, further optimizing the load transfer path, and meeting the heavy-duty and frequently stressed working conditions of mining vehicles.

[0016] 4. Strong structural adaptability, facilitating flexible adjustment and production. The detachable connection method allows for flexible adjustment of the spacing and number of crossbeams according to the load-bearing requirements of the mine car, without altering the main structure of the longitudinal beams; moreover, the composite design of welding and bolting balances connection strength and assembly flexibility. During production, the welding of the connecting plate and the first pad can be completed first (facilitating control of welding quality), followed by overall modular assembly, reducing the difficulty of the production process and improving production efficiency and product consistency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 Here are structural diagrams of existing welded frames; (a) is a directly welded frame, and (b) is a welded frame with connecting plates. Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a cross-sectional view of the present invention; In the diagram: 1. Horizontal beam, 2. Longitudinal beam, 21. Outer beam plate, 22. Inner beam plate, 23. Reinforcing plate, 3. Connecting plate, 31. Vertical plate, 32. Horizontal plate, 33. First plug weld hole, 4. First pad plate, 41. Second plug weld hole, 5. Second connector, 6. First connector, 7. Second pad plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this application will be described in detail below through specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] like Figure 2 and Figure 3 As shown, a rigid frame for mining includes longitudinal beams 2 and crossbeams 1; The two longitudinal beams 2 are arranged in parallel and symmetrically to form the longitudinal load-bearing foundation of the frame; a first pad 4 is attached to the inner side wall of each longitudinal beam 2, and the first pad 4 and the longitudinal beam 2 are detachably fastened through the first connector 6 to ensure connection stability and facilitate subsequent disassembly and maintenance. Multiple crossbeams 1 are arranged at intervals along the length of the longitudinal beams 2, and the crossbeams 1 are transversely mounted between two longitudinal beams 2 to form the transverse load-bearing structure of the frame; both ends of the crossbeams 1 are fitted with connecting plates 3, and the connecting plates 3 and the ends of the crossbeams 1 are detachably fixed by the second connecting piece 5; the side of the connecting plate 3 away from the crossbeams 1 is welded to the side of the first pad 4, and the weld is flat and without exposed defects, forming a composite connection structure that combines bolting and welding, which ensures connection strength and avoids stress concentration.

[0022] In some embodiments, such as Figure 2 , Figure 3 As shown, each end of the crossbeam 1 is equipped with two connecting plates 3. The two connecting plates 3 are respectively arranged on the upper and lower sides of the crossbeam 1, and the end of each connecting plate 3 away from the crossbeam 1 is welded and fixed to the first pad plate 4. The connection stability and load transfer uniformity between the crossbeam 1 and the longitudinal beam 2 are further improved by the double-sided connection.

[0023] In some embodiments, both the first connector 6 and the second connector 5 use high-strength bolts and matching nuts, and the thread specifications of the bolts and nuts are compatible to adapt to the harsh working conditions of heavy loads and frequent stresses of mining vehicles, ensuring the tightness and fatigue resistance of the connection structure.

[0024] In some embodiments, such as Figure 2 As shown, the connecting plate 3 is an integrally formed L-shaped structure, including a vertical plate 31 and a horizontal plate 32; the vertical plate 31 is welded and fixed to the side of the first pad plate 4 after being attached, and the weld has no exposed defects; the horizontal plate 32 is tightly attached to the end face of the crossbeam 1, and the horizontal plate 32 is provided with an installation hole adapted to the second connecting piece 5. The second connecting piece 5 passes through the installation hole to realize the detachable fastening of the horizontal plate 32 and the crossbeam 1, ensuring the fit and load-bearing stability of the connection.

[0025] In some embodiments, such as Figure 2 As shown, the contact area between the vertical plate 31 and the first pad 4 is provided with a plurality of first plug welding holes 33. The first plug welding holes 33 are elongated holes and are evenly spaced along the length of the vertical plate 31. The plug welding process enables the vertical plate 31 and the first pad 4 to form a tight weld fusion connection, which significantly enhances the connection strength and anti-peeling ability of the two, and can stably adapt to the complex force transmission requirements under heavy-duty mining conditions. Meanwhile, multiple second plug welding holes 41 are provided in the contact area between the first pad 4 and the longitudinal beam 2. The second plug welding holes 41 are also set as elongated holes and are evenly distributed along the length direction of the first pad 4. The plug welding process enables the first pad 4 and the longitudinal beam 2 to form a weld fusion and fixation, further improving the connection reliability between the first pad 4 and the longitudinal beam 2 and ensuring the stability of the load transmission path.

[0026] In some embodiments, as shown in FIG3, the longitudinal beam 2 adopts a composite frame structure, specifically including a U-shaped outer beam plate 21 and an inner beam plate 22; the inner beam plate 22 is adapted to be assembled on the open side of the U-shaped outer beam plate 21, and the two are welded together to form a closed load-bearing frame, which greatly improves the torsional and bending stiffness of the longitudinal beam 2. The inner beam plate 22 has a second pad 7 and a first pad 4 tightly fitted on both ends, and the first pad 4, the inner beam plate 22 and the second pad 7 are respectively provided with mounting holes that are compatible with the first connector 6. The first connector 6 of the same group passes through the mounting holes of the first pad 4, the inner beam plate 22 and the second pad 7 in sequence to achieve coaxial fastening of the three, ensure the coaxiality and tightness of the connection, and make the load evenly transferred to the longitudinal beam 2 through the pads to avoid local stress concentration.

[0027] In some embodiments, the first pad 4 and the second pad 7 are both integrally formed from high-strength alloy steel plates with a plate thickness of 8-15mm, which can fully adapt to the load-bearing requirements of heavy-duty mining conditions. At the same time, the mating surfaces of the pads and the longitudinal beam 2 are processed with uniformly distributed anti-slip textures (such as diamond patterns or sawtooth patterns) with a texture depth of 0.5-1mm, which can effectively increase the friction coefficient between the pads and the longitudinal beam 2, suppress relative slippage, and further improve the stability of the connection structure and the reliability of load transmission.

[0028] In some embodiments, such as Figure 3 As shown, L-shaped reinforcing plates 23 are welded to the inner sides of the two bends of the U-shaped outer beam plate 21. The two mating surfaces of the L-shaped reinforcing plates 23 are tightly fitted to the inner sidewalls of the U-shaped outer beam plate 21 and form a continuous weld for fixation. This significantly enhances the structural strength and deformation resistance of the bent parts of the U-shaped outer beam plate 21, effectively disperses the local stress of the longitudinal beam 2 under heavy load conditions, and further improves the overall load-bearing stability of the longitudinal beam.

[0029] Finally, this utility model also provides a mining car, which is equipped with a mining rigid frame as described in any of the above embodiments. The mining rigid frame is fixedly connected to the main body of the mining car through longitudinal beams to form the core load-bearing frame of the mining car. This design allows the mining truck to fully inherit the structural advantages of a rigid mining frame, effectively avoids the hidden dangers of welding cracks in traditional frames, significantly improves the operational stability and service life of the mining truck under heavy loads and rugged road conditions, simplifies the subsequent maintenance process of the mining truck, reduces the overall operating cost, and adapts to the harsh working conditions required in mining operations.

[0030] The above descriptions are merely embodiments of this utility model, and common technical solutions and / or characteristics known in the scheme are not described in detail here. It should be noted that those skilled in the art can make various modifications, improvements, or equivalent substitutions without departing from the technical solution of this utility model, and all such modifications, improvements, or equivalent substitutions should be covered within the scope of the claims of this utility model. The scope of protection claimed in this application should be determined by the content of its claims, and the detailed descriptions of the embodiments can be used to interpret the content of the claims.

Claims

1. A rigid frame for mining, characterized in that, include: The longitudinal beams (2) are arranged symmetrically, and each longitudinal beam (2) is detachably mounted with a first pad (4) via a first connector (6). A crossbeam (1), a plurality of the crossbeams (1) are arranged at intervals between two longitudinal beams (2) along the length direction of the longitudinal beam (2). The two ends of the crossbeams (1) are respectively detachably installed with connecting plates (3) through second connecting parts (5). The end of the connecting plate (3) away from the crossbeam (1) is welded and fixed to the first pad (4).

2. A rigid mining vehicle frame according to claim 1, characterized in that, The connecting plate (3) is L-shaped and includes an integrally formed vertical plate (31) and a horizontal plate (32). The vertical plate (31) is welded and fixed to the first pad (4). The horizontal plate (32) is attached to the crossbeam (1) and can be detachably fixed by the second connector (5).

3. A rigid mining vehicle frame according to claim 2, characterized in that, Both the first connector (6) and the second connector (5) are bolts and matching nuts.

4. A rigid mining vehicle frame according to claim 2, characterized in that, Both the vertical plate (31) and the first pad plate (4) are provided with plug welding holes.

5. A rigid mining vehicle frame according to claim 1, characterized in that, The longitudinal beam (2) includes a U-shaped outer beam plate (21) and an inner beam plate (22). The inner beam plate (22) is fixedly installed on the open side of the U-shaped outer beam plate (21), and the two together enclose a closed frame structure. The inner beam plate (22) is provided with a second pad (7) and a first pad (4) respectively on both sides. The first pad (4) and the second pad (7) are fixed by the same set of first connectors (6) through the inner beam plate (22).

6. A rigid mining vehicle frame according to claim 5, characterized in that, Both the first pad (4) and the second pad (7) are made of high-strength alloy steel plates, and the mating surfaces of the pads and the longitudinal beam (2) are provided with anti-slip textures.

7. A rigid mining vehicle frame according to claim 5, characterized in that, The inner sides of the two bends of the U-shaped outer beam plate (21) are each welded with an L-shaped reinforcing plate (23).

8. A mining car, characterized in that, The mining car is equipped with a mining rigid frame as described in any one of claims 1-7.

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