Upper gantry beam structure, frame and mining dump truck

Abstract

The utility model discloses an upper gantry beam structure, a frame and a mining dump truck. The upper gantry beam structure is of an arch structure composed of an upper cover plate, a lower cover plate, a front side plate and a rear side plate. Wherein the lower cover plate is integrally bent and is detachably connected with a left mounting point and a right mounting point of a frame; the upper cover plate is formed by bending a whole plate, and two sides of the upper cover plate are welded with the lower cover plate; the front side plate and the rear side plate are integral plates, and the geometric contours of the front side plate and the rear side plate are matched with those of the upper cover plate and the lower cover plate to be welded between the upper cover plate and the lower cover plate. The whole bending plate is used at the position of the lower half tension structure of the upper gantry beam to connect the left mounting point and the right mounting point, so that the maximum stress point of the structure is located on base metal, and the fatigue life of the structure is prolonged.

Description

Technical Field

[0001] The utility model relates to an upper gantry beam structure and belongs to the technical field of mining dump trucks. Background Art

[0002] The front axle of a mining dump truck using oil and gas suspension usually uses an upper gantry beam to connect the left and right structures to bear the lateral force of the front axle suspension. The left and right mounting structures of this type of upper gantry beam structure are connected by welds. The welds are subject to tensile stress and are the main stress concentration points of the structure, which are prone to fatigue cracking. Summary of the invention

[0003] The utility model provides an upper gantry beam structure, in which a whole bent plate is used to connect left and right installation points at the lower half tension structure position of the upper gantry beam, so that the maximum stress point of the structure is located on the parent material, thereby improving the fatigue life of the structure.

[0004] The utility model is implemented according to the following technical solutions:

[0005] In the first aspect, the utility model discloses an upper gantry beam structure, which is composed of an upper cover plate, a lower cover plate and front and rear side plates to form an arch structure; wherein the lower cover plate is made of a whole plate bent and is connected to the left and right mounting points of the frame in a detachable manner; the upper cover plate is made of a whole plate bent and the two sides are welded together with the lower cover plate; the front and rear side plates are made of a whole plate, and their geometric contours match those of the upper and lower cover plates, so that they are welded between the upper and lower cover plates.

[0006] In some embodiments, the wide sides of the upper cover plate extend all the way to the wide sides of the lower cover plate; the lower cover plate is narrow in the middle and wide on both sides, and there is a smooth transition between the narrow middle part and the wide sides; the width of the narrow middle part of the lower cover plate is basically the same as the width of the upper cover plate, and the front and rear ends of both sides of the lower cover plate are provided with multiple mounting holes in the protruding parts of the upper cover plate, and are fixed to the frame by bolts.

[0007] In some embodiments, the mounting hole on one side of the lower cover plate is a circular hole, and the mounting hole on the other side is an oblong hole.

[0008] In some embodiments, the mounting holes at the front and rear ends of both sides of the lower cover plate are two rows of mounting holes, which are used to increase the connection strength of the upper gantry beam.

[0009] In some embodiments, the upper cover plate is provided with a trapezoidal gradual transition portion with increasing width at the end portion connected to the lower cover plate.

[0010] In some embodiments, there are semi-V-shaped grooves at the joint positions between the two sides of the upper cover plate and the lower cover plate.

[0011] In some embodiments, both horizontal ends of the lower cover are provided with a plate matching its geometric contour, the plate is welded to the bottom surface of the lower cover, and a mounting hole coaxial with the lower cover is provided on the plate.

[0012] In some embodiments, the plate is provided with at least one welding hole for reducing its welding deformation.

[0013] In a second aspect, the utility model discloses a vehicle frame, which is equipped with the above-mentioned upper gantry beam structure.

[0014] In a third aspect, the utility model discloses a mining dump truck, which is equipped with the above-mentioned upper gantry beam structure; or, is equipped with the above-mentioned vehicle frame.

[0015] Beneficial effects of the utility model:

[0016] 1. The upper gantry beam in the utility model uses a whole plate to connect the left and right suspension stress points of the frame, so that the maximum stress point of the upper gantry beam is located on the parent material, which greatly improves the fatigue life of the structure.

[0017] 2. The weld at the connection between the upper cover plate and the lower cover plate of the upper gantry beam in the utility model has a semi-V-shaped groove to prevent the weld from cracking due to tensile stress in the welding gap; the end of the upper cover plate has a trapezoidal gradual ending to slowly transition the structural stress, reduce structural stress concentration, and improve the structural fatigue life.

[0018] 3. The upper gantry beam mounting holes in the utility model have round holes on one side and oblong holes on the other side, which can avoid the inability to assemble due to welding deformation of the mounting plate; the mounting holes are a double-row structure, which reduces spatial interference with other components while ensuring the connection strength.

[0019] 4. There is a plate below the upper gantry beam in the utility model, and the plate can be processed to ensure the parallelism requirement of the structural installation surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0021] In the attached picture:

[0022] Figure 1 It is a schematic diagram of the connection between the upper gantry beam and the frame welding body;

[0023] Figure 2 It is an exploded schematic diagram of the connection between the upper gantry beam and the frame welding body;

[0024] Figure 3 It is a specific schematic diagram of the connection between the upper cover plate and the lower cover plate of the upper gantry beam;

[0025] Figure 4 This is a schematic diagram of the bottom structure of the upper gantry beam.

[0026] Figure identification: 10-upper gantry beam, 20-bolt, 30-frame welding body, 31-threaded hole, 11-upper cover plate, 12-front and rear side plates, 13-lower cover plate, 14-attachment plate, 15-attachment plate, 101-long round hole, 102-round hole, 103-welding small hole, 111-semi-V-shaped groove, 112-trapezoidal gradual transition part.

[0027] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figure 1 , Figure 2As shown, an upper gantry beam structure is composed of an upper cover plate 11, a lower cover plate 13 and front and rear side plates 12 to form an arch structure. The whole is a main load-bearing structure, the upper structure is compressed, and the lower structure is tensile; wherein the lower cover plate 13 is bent by a whole plate and connected to the left and right mounting points of the frame in a detachable manner, so that the maximum point of structural tensile stress can be concentrated on the structural parent material; the upper cover plate 11 is bent by a whole plate, and the two sides are welded together with the lower cover plate 13; the front and rear side plates 12 are made of a whole plate, and their geometric contours match the upper and lower cover plates 11, 13, so that they are welded between the upper and lower cover plates 11, 13.

[0032] Further solutions, such as Figure 1 , Figure 2 , Figure 3 As shown, the wide sides of the upper cover plate 11 extend all the way to the wide sides of the lower cover plate 13; the lower cover plate 13 is narrow in the middle and wide on both sides, and the narrow part in the middle and the wide parts on both sides are smoothly transitioned; the width of the narrow part in the middle of the lower cover plate 13 is basically the same as the width of the upper cover plate 11, and the front and rear ends of both sides of the lower cover plate 13 are provided with multiple mounting holes at the parts protruding from the upper cover plate 11, and are fixed to the vehicle frame by bolts 20. The above structure eliminates the need to install bolts 20 on the outside of the upper cover plate 11, reduces the spatial interference between the upper gantry beam 10 and other components, and can be disassembled and repaired without disassembling other components.

[0033] Further solutions, such as Figure 4 As shown, the mounting hole on one side of the lower cover plate 13 is a circular hole 102, and the mounting hole on the other side is an oblong hole 101, which can cope with the dimensional error caused by welding deformation of the main structure of the frame while ensuring the installation size.

[0034] The preferred solution is Figure 1 , Figure 2 As shown, the mounting holes at the front and rear ends of both sides of the lower cover plate 13 are two rows of mounting holes, which are used to increase the connection strength of the upper gantry beam 10. In this embodiment, two bolts are provided in the inner row and three bolts are provided in the outer row. Of course, the number of bolts is not limited to the above, and can be modified accordingly according to actual design requirements.

[0035] Further solutions, such as Figure 1 , Figure 2 , Figure 3 As shown, the upper cover plate 11 is provided with a trapezoidal gradual transition portion 112 with increasing width at the end portion connected to the lower cover plate 13 to reduce stress concentration at the end of the structure.

[0036] Further solutions, such as Figure 1 , Figure 2 , Figure 3 As shown, there are semi-V-shaped grooves 111 at the joint positions of the upper cover plate 11 and the lower cover plate 13 on both sides. When there is a gap between the upper and lower cover plates 11 and 13, the weld penetration is guaranteed so that the weld is mainly subjected to compressive stress.

[0037] Further solutions, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the horizontal parts at both ends of the lower cover 13 are each provided with a plate 14, 15 matching the geometric profile thereof, the plates 14, 15 are welded to the bottom surface of the lower cover 13, and the plates 14, 15 are provided with mounting holes coaxial with the lower cover 13. The function of the plates 14, 15 is to ensure the size of the structural mounting surface by processing the lower surface of the plates 14, 15 when the lower cover 13 is bent and deformed and the parallelism requirement of the left and right mounting surfaces cannot be ensured.

[0038] The preferred solution is Figure 4 As shown, at least one welding hole 103 is provided on the plates 14 and 15 for reducing the welding deformation thereof, so as to reduce the welding deformation of the plates 14 and 15.

[0039] The utility model also provides a vehicle frame, comprising the above-mentioned upper gantry beam structure. The connection holes of the vehicle frame welding body 30 are threaded holes 31, and the upper gantry beam 10 is connected to the vehicle frame welding body 30 arranged on both sides by bolts 20.

[0040] The utility model also provides a mining dump truck, which is equipped with the above-mentioned upper gantry beam structure; or, is equipped with the above-mentioned vehicle frame.

[0041] In summary, the upper gantry beam in the utility model uses a whole plate to connect the left and right suspension stress points of the frame, so that the maximum stress point of the upper gantry beam is located on the parent material, which greatly improves the fatigue life of the structure. The upper gantry beam in the utility model has a semi-V-shaped groove at the connection between the upper cover plate and the lower cover plate of the upper gantry beam to avoid cracking of the weld due to tensile stress in the welding gap; the upper cover plate has a trapezoidal gradient end to slowly transition the structural stress, reduce structural stress concentration, and improve the fatigue life of the structure. The upper gantry beam mounting hole in the utility model has a round hole on one side and an oblong hole on the other side to avoid the inability to assemble due to welding deformation of the mounting plate; the mounting holes are a double-row structure to reduce spatial interference with other components while ensuring the connection strength. There is a patch plate under the upper gantry beam in the utility model, which can be processed to ensure the parallelism requirements of the structural mounting surface.

[0042] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0043] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present utility model and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by the present application.

[0044] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. An upper gantry beam structure, characterized in that: The arch structure is composed of an upper cover plate, a lower cover plate, and front and rear side plates; Among them, the lower cover plate is made of a whole plate bent and connected to the left and right mounting points of the frame in a detachable manner; the upper cover plate is made of a whole plate bent and the two sides are welded to the lower cover plate; the front and rear side plates are made of a whole plate, and their geometric contours match the upper and lower cover plates, so that they are welded between the upper and lower cover plates.

2. The upper gantry beam structure according to claim 1, characterized in that: The wide sides of the upper cover plate extend all the way to the wide sides of the lower cover plate; The lower cover plate is narrow in the middle and wide on both sides, and the narrow part in the middle and the wide parts on both sides have a smooth transition; The width of the narrow middle portion of the lower cover is substantially consistent with that of the upper cover. The front and rear ends of both sides of the lower cover are provided with a plurality of mounting holes at the portions protruding from the upper cover and are fixed to the vehicle frame by bolts.

3. The upper gantry beam structure according to claim 2, characterized in that: The mounting hole on one side of the lower cover plate is a round hole, and the mounting hole on the other side is an oblong hole.

4. The upper gantry beam structure according to claim 2, characterized in that: The mounting holes at the front and rear ends of both sides of the lower cover plate are arranged in two rows, which are used to increase the connection strength of the upper gantry beam.

5. The upper gantry beam structure according to claim 1, characterized in that: The upper cover plate is provided with a trapezoidal gradual transition portion with increasing width at the end portion connected to the lower cover plate.

6. The upper gantry beam structure according to claim 1, characterized in that: There are semi-V-shaped grooves at the joint positions between the two sides of the upper cover plate and the lower cover plate.

7. The upper gantry beam structure according to claim 1, characterized in that: Both ends of the lower cover are provided with a plate matching the geometric contour thereof, the plate is welded to the bottom surface of the lower cover, and a mounting hole coaxial with the lower cover is provided on the plate.

8. The upper gantry beam structure according to claim 7, characterized in that: The plate is provided with at least one small welding hole for reducing its welding deformation.

9. A frame, characterized in that: An upper gantry beam structure according to any one of claims 1 to 8 is installed.

10. A mining dump truck, characterized in that: The vehicle frame is installed with the upper gantry beam structure according to any one of claims 1 to 8; or, the vehicle frame is installed with the frame according to claim 9.

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