Lifting cross beam structure of off-highway mining dump truck

Abstract

The utility model discloses a lifting cross beam structure of an off-highway mining dump truck, which comprises a tubular beam horizontally arranged; the lifting shafts and the tubular beam are coaxially arranged, the lifting shafts are arranged at the two ends of the tubular beam respectively, and the lifting shafts are connected with lifting oil cylinders and limit the left-right movement of the lifting oil cylinders on the sides where the lifting shafts are located; the pair of box type beams are vertically arranged on the pair of lifting shafts respectively, and the pair of box type beams are connected with the frame longitudinal beams; wherein the lifting oil cylinder penetrates through the side edge of the longitudinal beam of the frame and is connected to a carriage arranged on the frame. The lifting beam structure has the advantages of being simple in structure, convenient to overhaul, low in failure rate and low in cost, and enough torsional rigidity and strength of the lifting beam structure can be maintained without additional reinforcing structures.

Description

Technical Field

[0001] The utility model relates to the technical field of off-road mining dump trucks, and more specifically, to a lifting beam structure of an off-road mining dump truck. Background Art

[0002] An off-road mining dump truck is a heavy-duty dump truck used in open-pit mines to travel between mining sites and unloading sites to complete rock and earth stripping and ore transportation tasks. An off-road mining dump truck mainly includes a frame longitudinal beam, a carriage and a lifting mechanism. The lifting mechanism is used to lift the carriage to unload materials, etc. It includes a lifting beam structure and a lifting cylinder arranged on the lifting beam structure. The lifting beam structure of the off-road mining dump truck serves as the lower fulcrum when the lifting cylinder is working, and plays an important role in the loading, transportation, unloading and other working links of the mining dump truck. The lifting beam structure of the existing double-cylinder belly-lifted off-road mining dump truck generally includes a lifting shaft connected to the lifting cylinder and a tubular beam connected to the lifting shaft, and the box beam is arranged directly above the welding seam between the lifting shaft and the tubular beam. On the one hand, this structure cannot evenly transfer complex loads to the periphery, resulting in excessive stress on the lifting beam structure locally, which eventually leads to cracking or even fracture at the welding points between the lifting shaft and the box beam and between the lifting shaft and the tubular beam, causing the truck to stop due to a fault. In order to prevent the lifting shaft from breaking, it is necessary to add an additional complex structure to reduce the requirements for the stiffness and torsional strength of the lifting beam structure. On the other hand, the box beam is arranged across the tubular beam and the lifting shaft, resulting in the obstruction of the weld between the tubular beam and the lifting shaft, which is not conducive to checking the lifting shaft status and repairing faults. In order to overcome the above-mentioned defects that are not conducive to maintenance, the utility model patent with announcement number CN219115558U and name "A lifting beam assembly and engineering vehicle" discloses a lifting beam assembly, which includes a lifting beam and two lifting beam mounting seats, wherein lifting shaft heads are welded at both ends of the lifting beam, and the lifting shaft heads are used to connect the lifting cylinder. The technical solution sets the weld of the lifting shaft head (lifting shaft) and the lifting beam (tube beam) on the outside of the lifting beam mounting seat (box beam). Although it solves the problem that the lifting shaft is not easy to maintain, it makes the welding point between the lifting shaft head and the lifting beam more prone to cracking or even breaking. Therefore, the technical solution also adds additional reinforcement structures to maintain the structural stiffness and torsional strength requirements of the lifting beam, such as setting reinforcing ribs in the middle of the lifting beam (tube beam), connecting the lifting beam mounting seat (box beam) to the middle bridge beam at the same time, and setting a traction support in the middle of the lifting beam (tube beam) to connect the middle bridge. Utility Model Content

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.

[0004] Another object of the utility model is to provide a lifting beam structure for an off-road mining dump truck, which has a simple structure, is easy to maintain, has a low failure rate, and is low in cost, and can maintain sufficient torsional rigidity and strength of the lifting beam structure without the need for an additional reinforcement structure.

[0005] In order to achieve these purposes and other advantages according to the utility model, a lifting beam structure of an off-road mining dump truck is provided, comprising:

[0006] Tubular beams, which are arranged horizontally;

[0007] A pair of lifting shafts are coaxially arranged with the tube beam and are respectively arranged at two ends of the tube beam, the pair of lifting shafts are connected to the lifting cylinder and limit the lifting cylinder on the side to move left and right;

[0008] A pair of box beams, which are respectively vertically arranged on a pair of lifting shafts, and the pair of box beams are connected to the longitudinal beams of the frame;

[0009] Wherein, the lifting cylinder passes through the side of the frame longitudinal beam and is connected to the carriage arranged on the frame.

[0010] Preferably, the lifting shaft includes a hollow beam connected to the tubular beam, a tapered beam arranged at the end of the hollow beam, and a lifting cylinder connecting beam connected to the tapered beam, the large diameter end of the tapered beam is smoothly connected to the hollow beam, and the outer diameter of the small diameter end is slightly larger than the outer diameter of the lifting cylinder connecting beam to form a limit boss for limiting the left and right movement of the lifting cylinder.

[0011] Preferably, both ends of the tubular beam are provided with overlapping bosses for inserting into the hollow beam, and the tubular beam is inserted into the hollow beam and welded at the connection.

[0012] Preferably, the box beam includes an outer web, an inner web and a V-shaped transition rib, the lower parts of the outer web and the inner web are provided with through holes for the lifting shaft to pass through and a 45° welding groove so that the box beam is welded to the lifting shaft groove, and both ends of the V-shaped transition rib are provided with welding plates and a 45° welding groove so that the box beam is welded to the lower wing surface groove of the frame longitudinal beam.

[0013] Preferably, the lifting cylinder is sleeved on the lifting cylinder connecting beam, and an installation hole is provided at the end of the lifting cylinder connecting beam to install a lifting cylinder limiting locking plate.

[0014] The utility model further claims to protect an off-road mining dump truck, which comprises the off-road mining dump truck lifting beam structure.

[0015] The utility model at least includes the following beneficial effects: the box beam of the lifting beam structure of the off-road dump truck provided by the utility model is arranged on the lifting shaft, so that the welding seam of the lifting shaft and the pipe beam is exposed at the bottom of the frame, which is convenient for checking the status of the lifting beam structure and fault repair, and the welding seam of the lifting shaft and the pipe beam is arranged away from the lifting cylinder, which effectively improves the torsional strength of the lifting beam structure; the lifting shaft of the lifting beam structure of the off-road dump truck provided by the utility model includes a hollow beam, a tapered beam and a lifting cylinder connecting beam arranged in sequence, and the hollow beam enables the lifting shaft and the pipe beam to be overlapped and welded, thereby increasing the strength of the weld between the lifting shaft and the pipe beam, thereby improving the rigidity and torsional strength of the lifting beam structure. Strength, at the same time, the lifting shaft and the pipe beam lap welding structure have sufficient assembly clearance and welding clearance, which also reduces the overall weight of the lifting beam structure; the lifting shaft of the lifting beam structure of the off-road dump truck provided by the utility model has a limiting boss, which can effectively limit the left and right movement of the lifting cylinder; 45° grooves are provided at both ends of the box beam, so that the box beam and the lifting shaft are groove-welded, thereby improving the welding strength of the box beam and the lifting shaft, and the box beam and the frame longitudinal beam are groove-welded, and four multi-layer welds provide sufficient welding strength; the pipe beam of the lifting beam structure of the off-road mining dump truck provided by the utility model adopts a large-section thick-walled pipe beam, which can effectively ensure the torsional stiffness of the lifting beam structure.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded view of the lifting beam structure of the off-road mining dump truck in one technical solution of the utility model;

[0018] Figure 2 It is a schematic diagram of the assembly of the lifting beam structure of the off-road mining dump truck described in another technical solution of the utility model. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0020] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0021] like Figure 1 , 2 As shown, the utility model provides a lifting beam structure for an off-road mining dump truck, comprising:

[0022] The pipe beam 2 is arranged horizontally;

[0023] A pair of lifting shafts 1, which are coaxially arranged with the tube beam 2 and are respectively arranged at both ends of the tube beam 2, and the pair of lifting shafts 1 are connected to the lifting cylinder and limit the lifting cylinder on the side to move left and right;

[0024] A pair of box beams 3, which are respectively vertically arranged on a pair of lifting shafts 1, and the pair of box beams 3 are connected to the frame longitudinal beams 4;

[0025] The lifting cylinder passes through the side of the frame longitudinal beam 4 and is connected to the carriage arranged on the frame.

[0026] In the above technical scheme, the off-road mining dump truck described in the present application includes but is not limited to fuel off-road mining dump trucks, pure electric off-road mining dump trucks and hybrid off-road mining dump trucks. The lifting beam structure of the off-road mining dump truck includes a pipe beam 2, a pair of lifting shafts 1 and a pair of box beams 3 arranged on the pair of lifting shafts 1. The torsional rigidity of the lifting beam structure of the off-road mining dump truck can be guaranteed without an additional reinforcement structure, and the manufacturing cost is low, the manufacturing efficiency is high, and the requirements for the processing technology are low; a pair of lifting shafts 1 are coaxially arranged with the pipe beam 2 to connect the lifting cylinder. Here, the lifting cylinder serves as a driving mechanism for lifting the car body. It is easy for technical personnel in this field to think of replacing the lifting cylinder with other driving mechanisms, such as lifting cylinders, lifting frames, etc.; a pair of lifting shafts 1 are respectively connected to the two ends of the pipe beam 2, and the box beam 3 is arranged on the lifting shaft 1, so that the welds of the lifting shaft 1 and the pipe beam 2 are exposed at the bottom of the frame longitudinal beam 4, which is convenient for welding. It can also conveniently check the state of the lifting shaft and make reasonable early warning prompts, and it can also facilitate the maintenance of the connection between the lifting shaft 1 and the pipe beam 2. The farther the welding seam 5 of the lifting shaft 1 and the pipe beam 2 is from the lifting cylinder, the smaller the force on the welding seam 5 of the lifting shaft 1 and the pipe beam 2, and the stronger the torsional rigidity of the lifting beam structure. At the same time, the pipe beam 2 is the main strength component of the lifting beam structure of the off-road mining dump truck, and its length should not be too short. Therefore, the preferred ratio of the lifting shaft 1 to the pipe beam 2 is 1:2~3, which can not only meet the strength requirements of the lifting beam structure of the off-road mining dump truck itself, but also meet the torsional rigidity requirements of the lifting beam structure of the off-road mining dump truck. As a preferred embodiment, the pipe beam 2 is a seamless steel pipe with a large-section thick-walled pipe beam, which can effectively ensure the torsional rigidity of the lifting beam structure; the box beam 3 is directly connected to the lower wing surface of the frame longitudinal beam 4, and there is no need to connect it to the middle bridge beam 3. The height of the box beam 3 is small, saving a lot of raw material costs.

[0027] like Figure 1As shown, in one of the technical solutions, the lifting shaft 1 includes a hollow beam 101 connected to the tubular beam 2, a tapered beam 102 arranged at the end of the hollow beam 101, and a lifting cylinder connecting beam 103 connected to the tapered beam 102. The large-diameter end of the tapered beam 102 is smoothly connected to the hollow beam 101, and the outer diameter of the small-diameter end is slightly larger than the outer diameter of the lifting cylinder connecting beam 103 to form a limiting boss for limiting the left and right movement of the lifting cylinder. The outer diameter of the small-diameter end of the tapered beam is slightly larger than the outer diameter of the lifting cylinder connecting beam 103. A transition step is formed at the connection between the tapered beam 102 and the lifting cylinder connecting beam 103 as a limiting boss for limiting the left and right movement of the lifting cylinder. Preferably, the hollow beam 101, the tapered beam 102 and the lifting cylinder connecting beam 103 are connected to the hollow beam 101. The beam 103 is integrally formed. On the basis of meeting the requirements of strength and torsional stiffness, and provided that the technological level is reached, the hollow beam 101, the tapered beam 102 and the lifting cylinder connecting beam 103 can also be separately arranged. The hollow beam 101 enables the lifting shaft 1 and the tubular beam 2 to be overlapped and welded, thereby increasing the welding strength of the lifting shaft 1 and the tubular beam 2, thereby improving the stiffness and torsional strength of the lifting beam structure. The torsional strength and stiffness of the lifting beam structure are achieved through the improvement of its own structure, without the need for an additional reinforcement structure, thereby simplifying the lifting beam structure of the off-road mining dump truck and improving assembly efficiency. At the same time, the overlap welding structure of the lifting shaft 1 and the tubular beam 2 has sufficient assembly clearance and welding clearance, thereby reducing the overall weight of the lifting beam structure.

[0028] Figure 1 It can be seen that in one of the technical solutions, both ends of the tube beam 2 are provided with lap bosses inserted into the hollow beam 101, and the tube beam 2 is inserted into the hollow beam 101 and welded at the connection, thereby realizing the inserted lap welding form between the tube beam 2 and the lifting shaft 1, so that the lap welding structure of the lifting shaft 1 and the tube beam 2 has sufficient assembly clearance and welding clearance, thereby improving the strength of the weld seam 5 between the tube beam 2 and the lifting shaft 1.

[0029] like Figure 1 As shown, in one of the technical solutions, the box beam 3 includes an outer web 301, an inner web 303 and a V-shaped transition rib 302. The lower parts of the outer web 301 and the inner web 303 are provided with through holes for the lifting shaft 1 to pass through and a 45° welding groove so that the box beam 3 and the lifting shaft 1 are groove-welded. Both ends of the V-shaped transition rib 302 are provided with welding plates and a 45° welding groove so that the box beam 3 and the lower wing surface of the frame longitudinal beam 4 are groove-welded. The 45° groove welding of the box beam 3 and the lifting shaft improves the welding strength of the box beam 3 and the lifting shaft 1. The box beam 3 and the lower wing surface of the frame longitudinal beam 4 are groove-welded, and four multi-layer welds provide sufficient welding strength.

[0030] like Figure 1 As shown, in one of the technical solutions, the lifting cylinder is sleeved on the lifting cylinder connecting beam 103, and the end of the lifting cylinder connecting beam 103 is provided with a mounting hole to install the lifting cylinder limit lock plate, which can effectively prevent the lifting cylinder from moving left and right during operation. Compared with the method in the prior art to prevent the lifting cylinder from moving left and right by adding a spacer ring or a retaining ring, the structure provided by the present application is more economical.

[0031] The utility model further claims protection for an off-road mining dump truck, which includes the off-road mining dump truck lifting beam structure. The off-road mining dump truck lifting beam structure provided by the present application enables the off-road mining dump truck to have the advantages of low maintenance rate, low cost, light weight and easy maintenance.

[0032] As described above, according to the utility model, the utility model at least includes the following beneficial effects: the box beam of the lifting beam structure of the off-road dump truck provided by the utility model is arranged on the lifting shaft, so that the welding seam of the lifting shaft and the pipe beam is exposed at the bottom of the frame, which is convenient for checking the structural state and fault repair of the lifting beam structure, and the welding seam of the lifting shaft and the pipe beam is arranged away from the lifting cylinder, which effectively improves the torsional strength of the lifting beam; the lifting shaft of the lifting beam structure of the off-road dump truck provided by the utility model includes a hollow beam, a tapered beam and a lifting cylinder connecting beam arranged in sequence, and the hollow beam enables the lifting shaft and the pipe beam to be overlapped and welded, thereby increasing the weld strength of the lifting shaft and the pipe beam, thereby improving the lifting beam structure. The rigidity and torsional strength of the structure are improved, and at the same time, the lifting shaft and the pipe beam overlap welding structure have sufficient assembly clearance and welding clearance, which also reduces the overall weight of the lifting beam structure; the lifting shaft of the lifting beam structure of the off-road dump truck provided by the utility model has a limiting boss, which can effectively limit the left and right movement of the lifting cylinder; 45° grooves are provided at both ends of the box beam, so that the box beam and the lifting shaft are groove-welded, thereby improving the welding strength of the box beam and the lifting shaft, and the box beam and the frame longitudinal beam are groove-welded, and four multi-layer welds provide sufficient welding strength; the pipe beam of the lifting beam structure of the off-road mining dump truck provided by the utility model adopts a large-section thick-walled pipe beam, which can effectively ensure the torsional rigidity of the lifting beam structure.

[0033] The number of equipment and processing scale described here are used to simplify the description of the utility model. The application, modification and variation of the lifting beam structure of the off-highway mining dump truck of the utility model are obvious to those skilled in the art.

[0034] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. The lifting beam structure of the off-road mining dump truck is characterized by: include: Tubular beams, which are arranged horizontally; A pair of lifting shafts are coaxially arranged with the tube beam and are respectively arranged at two ends of the tube beam, the pair of lifting shafts are connected to the lifting cylinder and limit the lifting cylinder on the side to move left and right; A pair of box beams, which are respectively vertically arranged on a pair of lifting shafts, and the pair of box beams are connected to the longitudinal beams of the frame; Wherein, the lifting cylinder passes through the side of the frame longitudinal beam and is connected to the carriage arranged on the frame.

2. The lifting beam structure of the off-road mining dump truck according to claim 1, characterized in that: The lifting shaft includes a hollow beam connected to the tubular beam, a tapered beam arranged at the end of the hollow beam, and a lifting cylinder connecting beam connected to the tapered beam. The large diameter end of the tapered beam is smoothly connected to the hollow beam, and the outer diameter of the small diameter end is slightly larger than the outer diameter of the lifting cylinder connecting beam to form a limiting boss for limiting the left and right movement of the lifting cylinder.

3. The lifting beam structure of the off-road mining dump truck according to claim 2, characterized in that: Both ends of the tube beam are provided with overlapping bosses inserted into the hollow beam, and the tube beam is inserted into the hollow beam and welded at the connection.

4. The lifting beam structure of the off-road mining dump truck according to claim 2, characterized in that: The box beam includes an outer web, an inner web and a V-shaped transition rib. The lower parts of the outer web and the inner web are provided with through holes for the lifting shaft to pass through and a 45° welding groove so that the box beam and the lifting shaft groove are welded. Both ends of the V-shaped transition rib are provided with welding plates and a 45° welding groove so that the box beam and the lower wing surface groove of the frame longitudinal beam are welded.

5. The lifting beam structure of the off-road mining dump truck according to claim 2, characterized in that: The lifting cylinder is sleeved on the lifting cylinder connecting beam, and an installation hole is provided at the end of the lifting cylinder connecting beam to install a lifting cylinder limiting locking plate.

6. An off-road mining dump truck, characterized in that: It comprises the lifting cross beam structure of the off-road mining dump truck as described in any one of claims 1 to 5.

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