Four-axle mining dump truck frame

Abstract

The invention provides a four-axle mining dump truck frame which comprises a front axle longitudinal beam, a rear axle longitudinal beam and a cross beam assembly, the front axle longitudinal beam and the rear axle longitudinal beam are arranged in a bilateral symmetry mode, the cross beam assembly is used for connecting the front axle longitudinal beam and the rear axle longitudinal beam, and the cross beam assembly comprises a U-shaped cast beam, a two-axle cross beam assembly, a three-axle cross beam assembly and a four-axle cross beam assembly; the rear axle longitudinal beam comprises a second axle longitudinal beam, a third axle longitudinal beam and a fourth axle longitudinal beam; the second-bridge longitudinal beam and the third-bridge longitudinal beam are fixedly connected through a second-bridge cross beam assembly; the third-bridge longitudinal beam and the fourth-bridge longitudinal beam are fixedly connected through a third-bridge cross beam assembly; the four-bridge cross beam assembly is fixedly connected with the end, away from the three-bridge cross beam assembly, of the four-bridge longitudinal beam. By arranging the four-axle longitudinal beams and the four-axle cross beam assemblies, an installation foundation is provided for achieving the four-axle mining dump truck, all the axle longitudinal beams are fixedly connected into a whole through the cross beam assemblies, operation is easier during production and manufacturing, the truck frame assembling time is saved, the production cycle of all the components is shorter, and the production efficiency of the four-axle truck frame is greatly improved.

Description

Technical Field

[0001] The present invention relates to a frame of a four-axle mining dump truck, belonging to the technical field of construction machinery. Background Art

[0002] Off-highway mining dump trucks are key equipment for the mining and construction of open-pit metal and non-metal mines, large sand and gravel aggregates, and earthworks. At present, the trend of large-scale development of off-highway mining dump trucks is becoming increasingly obvious, and increasing the number of axles is an important development direction to effectively improve the load-bearing capacity of off-highway mining dump trucks. At present, there are few frame solutions for four-axle off-highway mining dump trucks on the market.

[0003] Moreover, the frames of off-highway mining dump trucks are mainly divided into riveted type and welded type. The riveted frame is formed by bolt connection of each reinforcement plate and load-bearing component, which is simple to manufacture, but has a low load-bearing bottleneck and a low service life of the frame. The welded frame is mainly made by welding steel plates. Welds are inevitable at places with large bearing capacity and complex stress, and fatigue cracking is likely to occur at the welds.

[0004] In view of the problems existing in the above-mentioned prior art, this patent provides a frame layout method for a four-axle off-highway mining dump truck, which can bear large loads, reduce the stress concentration at parts with large bearing capacity and complex stress, and improve the reliability of the frame. Summary of the Invention

[0005] Object of the Invention: Aiming at the deficiencies existing in the prior art, the present invention provides a frame of a four-axle mining dump truck to solve the problems mentioned in the above background art.

[0006] Technical Solution: A frame of a four-axle mining dump truck includes front axle longitudinal beams and rear axle longitudinal beams symmetrically arranged on the left and right, and a crossbeam assembly for connecting the front axle longitudinal beams and the rear axle longitudinal beams. The crossbeam assembly includes a U-shaped casting beam, a second-axle crossbeam assembly, a third-axle crossbeam assembly, and a fourth-axle crossbeam assembly; The front axle longitudinal beam is fixedly connected to the second-axle longitudinal beam through the U-shaped casting beam. The rear axle longitudinal beam includes a second-axle longitudinal beam, a third-axle longitudinal beam, and a fourth-axle longitudinal beam; The second-axle longitudinal beam is fixedly connected to the third-axle longitudinal beam through the second-axle crossbeam assembly; the third-axle longitudinal beam is fixedly connected to the fourth-axle longitudinal beam through the third-axle crossbeam assembly; the fourth-axle crossbeam assembly is fixedly connected to one end of the fourth-axle longitudinal beam away from the third-axle crossbeam assembly.

[0007] Based on a three-axle mining dump truck, the present invention provides an installation basis for realizing a four-axle mining dump truck by setting a fourth-axle longitudinal beam and a fourth-axle crossbeam assembly. The longitudinal beams of each axle are fixedly connected into one body through the crossbeam assembly, which is easier to operate during production and manufacturing, saves the frame assembly time, and the production cycle of each component is also shorter, greatly improving the production efficiency of the four-axle frame.

[0008] It further includes an integrated mounting base provided at the lower end of the three-axle longitudinal beam. The integrated mounting base includes first mounting bases symmetrically arranged and respectively mounted under the two sides of the three-axle longitudinal beam. A through hole is provided in any one of the first mounting bases, and a thrust rod mounting pin hole is provided on the side of the first mounting base. A lifting cylinder mounting shaft is embedded in the through hole, and the two sides of the first mounting bases are connected by a lifting cylinder mounting beam embedded in the through hole. The lifting cylinder mounting shaft is in interference fit with the holes at both ends of the lifting cylinder mounting beam and is fixedly welded to the side of the first mounting base.

[0009] In order to save installation space, the installation base of the lifting cylinder and the installation base of the thrust rod are integrated on one mounting base, making the frame structure more compact. At the same time, the connection point of the thrust rod is inside the structure, which can play a protective role for the thrust rod and reduce the failure rate of the vehicle in the harsh environment of the mine. The two sides of the first mounting bases are connected by a lifting cylinder mounting beam, improving the stress state of the two sides of the thrust rod when subjected to alternating lateral forces, avoiding unilateral load-bearing, and reducing the possibility of weld cracking. The integrated mounting base and the second-axle crossbeam assembly form a triangular structure in the middle of the frame, effectively strengthening the anti-bending and anti-torsion strength of the middle of the frame.

[0010] A first reinforcing crossbeam is provided between the two sides of the second-axle longitudinal beams. The two ends of the first reinforcing crossbeam are respectively perpendicular to the two sides of the second-axle longitudinal beams, and the joints at both ends are fixedly welded.

[0011] Since the length of the second-axle longitudinal beam is relatively long, setting the first reinforcing crossbeam increases the anti-torsion performance of the frame and improves the load-bearing capacity and reliability of the frame.

[0012] A second reinforcing crossbeam is provided between the two sides of the front-axle longitudinal beams. The two ends of the first reinforcing crossbeam are respectively perpendicular to the two sides of the second-axle longitudinal beams, and the joints at both ends are fixedly connected by bolts. It further includes a third reinforcing crossbeam fixedly installed on the upper side of the U-shaped casting beam by bolts.

[0013] In order to improve the strength of the front-axle longitudinal beam, by setting the second reinforcing crossbeam and the U-shaped casting beam in combination, the stressed part forms an arc-shaped structure, ensuring uniform stress distribution and avoiding stress concentration.

[0014] A front-axle thrust rod mounting seat assembly is provided on the lower sides of the two sides of the front-axle longitudinal beams, including a second mounting base with its upper side fixedly connected to the lower side of the front-axle longitudinal beam. The upper side of the second mounting base extends outward, and the extended part is fixedly welded to the side of the front-axle longitudinal beam through a reinforcing rib plate. Through holes are formed in the lower parts of the second mounting bases on both sides, and they are fixedly connected through a first connecting beam penetrating through the through holes. Front axle thrust rod pin holes for mounting the front axle thrust rod are formed in the sides of the second mounting bases on both sides.

[0015] To provide a mounting foundation for the front axle thrust rod and ensure the connection stability of the front axle thrust rod mounting seat assembly, the connection strength between the second mounting base and the front axle longitudinal beam is improved by arranging a plurality of reinforcing rib plates.

[0016] Fourth axle thrust rod mounting seat assemblies are arranged on the lower sides of the fourth axle longitudinal beams on both sides, including a third mounting base. The inner side of any one of the third mounting bases extends upward and is fixedly connected to the inner side of the fourth axle longitudinal beam. Through holes are formed in the middle parts of the third mounting bases on both sides, and they are fixedly connected through a second connecting beam penetrating through the through holes. Fourth axle thrust rod pin holes for mounting the fourth axle thrust rod are formed in the sides of the third mounting bases on both sides.

[0017] The third mounting bases on both sides are connected through the second connecting beam. When the thrust rods on the left and right sides of the fourth axle are in the stress state under alternating lateral forces, unilateral bearing is avoided, and the possibility of weld cracking is reduced. Moreover, the fourth axle thrust rod mounting seat assembly, the third bridge cross beam assembly, and the fourth bridge cross beam assembly form a triangular structure in the rear end area of the vehicle frame, effectively strengthening the bending and torsional strength of the vehicle frame.

[0018] The U-shaped casting beam is arranged as a combined welded structure, including front suspension oil cylinder supports symmetrically arranged at the lower ends of the front axle longitudinal beams on both sides and a front axle cross tie rod support connecting the front suspension oil cylinder supports on both sides. The two ends of the front axle cross tie rod support are welded and fixed to the lower ends of the front suspension oil cylinder supports. The front suspension oil cylinder support is bent inward near the connection with the front axle cross tie rod support, forming an arc-shaped structure with the front axle cross tie rod support.

[0019] Adopting a welded structure can reduce the production difficulty of the U-shaped casting beam. Using castings can better ensure strength and material reliability. The complex stress parts are designed with arc transitions, which is beneficial to the smooth transition of stress and effectively improves the load-bearing capacity and reliability.

[0020] The second bridge cross beam assembly and the third bridge cross beam assembly have the same structure. Any second bridge cross beam assembly or third bridge cross beam assembly includes suspension oil cylinder supports on both sides and a first steel pipe beam for connecting the suspension oil cylinder supports on both sides. First welding pads that can be inserted into the first steel pipe beam are arranged at the positions corresponding to the first steel pipe beam on the inner sides of the suspension oil cylinder supports on both sides. It also includes a first thrust rod mounting seat integrally cast for mounting the second axle thrust rod or the third axle thrust rod.

[0021] In order to provide an installation base for the suspension cylinders of the axle, hinge seats for installing the suspension cylinders are provided on each crossbeam assembly; at the same time, the steel pipe beam has a low cost, a simple structure, convenient connection, and the weld position avoids the stress concentration position, further preventing weld cracking and improving the connection strength and reliability.

[0022] On both sides of the four-axle crossbeam assembly, it includes rear suspension cylinder supports and a second steel pipe beam for connecting the rear suspension cylinder supports on both sides; Second welding pads that can be inserted into the first steel pipe beam are provided at positions corresponding to the first steel pipe beam on the inner sides of the rear suspension cylinder supports on both sides; It also includes a second thrust rod mounting seat integrally cast for installing the four-axle thrust rod.

[0023] In order to provide an installation base for the four-axle suspension cylinders and at the same time meet the connection of the four-axle thrust rod.

[0024] Its characteristics are as follows: The second-bridge longitudinal beam and the third-bridge longitudinal beam are fixedly welded through a second-bridge crossbeam assembly; the third-bridge longitudinal beam and the fourth-bridge longitudinal beam are fixedly welded through a third-bridge crossbeam assembly; the four-axle crossbeam assembly is fixedly welded to one end of the fourth-bridge longitudinal beam far from the third-bridge crossbeam assembly; A welding groove is opened at the edge of the upper surface of the second mounting base; A welding pad inserted into the front axle cross tie rod support is provided at the connection between the front suspension cylinder support and the front axle cross tie rod support, and a welding groove is opened at the edge of the connection between the front axle cross tie rod support and the front suspension cylinder support; Welding grooves are opened at the connections of the first welding pad, the second welding pad, the first steel pipe beam and the second steel pipe beam.

[0025] Setting a welding groove on one side of the connection surface increases the welding width, improves welding stability, avoids weld cracking, and improves the connection strength and reliability.

[0026] When welding grooves are opened on both sides of the connection surface, a V-shaped groove is formed, increasing the welding width, improving welding stability, and the weld position avoids the stress concentration position, further preventing weld cracking and improving the connection strength and reliability.

[0027] Beneficial effects: Based on the three-axle mining dump truck, the present invention provides an installation base for realizing a four-axle mining dump truck by setting a fourth-bridge longitudinal beam and a four-axle crossbeam assembly. The longitudinal beams of each axle are fixedly connected into one body through the crossbeam assembly, which is easier to operate during production and manufacturing, saves the frame assembly time, and the production cycle of each component is also shorter, greatly improving the production efficiency of the four-axle frame.

[0028] To save installation space, the installation base of the lifting cylinder and the installation base of the thrust rod are integrated on one mounting seat, making the frame structure more compact. At the same time, the connection point of the thrust rod is inside the structure, which can protect the thrust rod and reduce the failure rate of the vehicle in the harsh environment of the mine. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0030] Figure 1 Isometric view of the overall installation structure of the present invention.

[0031] Figure 2 Bottom isometric view of the present invention.

[0032] Figure 3 Structural diagram of the front axle thrust rod mounting seat assembly of the present invention.

[0033] Figure 4 Exploded view of the integrated mounting seat structure of the present invention.

[0034] Figure 5 Structural diagram of the four-bridge mounting seat assembly of the present invention.

[0035] Figure 6 Exploded view of the U-shaped casting beam structure of the present invention.

[0036] Figure 7 Exploded view of the two-bridge crossbeam assembly structure of the present invention.

[0037] Figure 8 Exploded view of the four-bridge crossbeam assembly structure of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These 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 orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0040] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0041] As Figures 1 to 8 shown, a frame of a four-bridge mining dump truck includes front axle longitudinal beams 1 and rear axle longitudinal beams that are symmetrically arranged on the left and right, and a crossbeam assembly for connecting the front axle longitudinal beams 1 and the rear axle longitudinal beams. The crossbeam assembly includes a U-shaped casting beam 2, a second-bridge crossbeam assembly 3, a third-bridge crossbeam assembly 4, and a fourth-bridge crossbeam assembly 5; The front axle longitudinal beam 1 is fixedly connected to the second-bridge longitudinal beam 6 through the U-shaped casting beam 2. The rear axle longitudinal beam includes a second-bridge longitudinal beam 6, a third-bridge longitudinal beam 7, and a fourth-bridge longitudinal beam 8; The second-bridge longitudinal beam 6 is fixedly connected to the third-bridge longitudinal beam 7 through the second-bridge crossbeam assembly 3; the third-bridge longitudinal beam 7 is fixedly connected to the fourth-bridge longitudinal beam 8 through the third-bridge crossbeam assembly 4; the fourth-bridge crossbeam assembly 5 is fixedly connected to one end of the fourth-bridge longitudinal beam 8 away from the third-bridge crossbeam assembly 4.

[0042] Based on a three-bridge mining dump truck, the present invention provides an installation basis for realizing a four-bridge mining dump truck by providing a fourth-bridge longitudinal beam 8 and a fourth-bridge crossbeam assembly 5. The longitudinal beams of each bridge are fixedly connected into a whole through the crossbeam assembly, which is more easy to operate during production and manufacturing, saves the frame assembly time, and the production cycle of each component is also shorter, greatly improving the production efficiency of the four-bridge frame.

[0043] It also includes an integrated mounting seat 9 provided at the lower end of the three-axle longitudinal beam 7. The integrated mounting seat 9 includes first mounting bases 91 symmetrically arranged and respectively mounted under the two sides of the three-axle longitudinal beam 7. A through hole is provided in any one of the first mounting bases 91, and a thrust rod mounting pin hole 92 is provided on the side of the first mounting base 91. A lifting cylinder mounting shaft 93 is embedded in the through hole, and the two sides of the first mounting bases 91 are connected by a lifting cylinder mounting beam 94 embedded in the through hole. The lifting cylinder mounting shaft 93 is embedded in the holes at both ends of the lifting cylinder mounting beam 94 and is in interference fit with the lifting cylinder mounting beam 94, and is fixedly welded to the side of the first mounting base 91.

[0044] In order to save the installation space, the installation base of the lifting cylinder and the installation base of the thrust rod are integrated on one mounting seat, making the frame structure more compact. At the same time, the connection point of the thrust rod is inside the structure, which can play a role in protecting the thrust rod and reducing the failure rate of the vehicle in the harsh environment of the mine. The two sides of the first mounting bases 91 are connected by a lifting cylinder mounting beam 94, which improves the stress state of the two sides of the thrust rod when subjected to alternating lateral forces, avoids unilateral bearing, and reduces the possibility of weld cracking. The integrated mounting seat 9 and the second-axle crossbeam assembly 3 form a triangular structure in the middle of the frame, effectively strengthening the anti-bending and anti-torsion strength of the middle of the frame.

[0045] A first reinforcing crossbeam 10 is provided between the two sides of the second-axle longitudinal beam 6. The two ends of the first reinforcing crossbeam 10 are respectively perpendicular to the two sides of the second-axle longitudinal beam 6, and the joints at both ends are fixedly welded.

[0046] Since the length of the second-axle longitudinal beam 6 is relatively long, setting the first reinforcing crossbeam 10 increases the anti-torsion performance of the frame and improves the load-bearing capacity and reliability of the frame.

[0047] A second reinforcing crossbeam 11 is provided between the two sides of the front-axle longitudinal beam 1. The two ends of the first reinforcing crossbeam 10 are respectively perpendicular to the two sides of the second-axle longitudinal beam 6, and the joints at both ends are fixedly connected by bolts. It also includes a third reinforcing crossbeam 12 fixedly installed on the upper side of the U-shaped casting beam 2 by bolts.

[0048] In order to improve the strength of the front-axle longitudinal beam 1, by setting the second reinforcing crossbeam 11 and combining it with the U-shaped casting beam 2, the stressed part forms an arc-shaped structure, ensuring uniform stress distribution and avoiding stress concentration.

[0049] A front-axle thrust rod mounting seat assembly 13 is provided on the lower side of the two sides of the front-axle longitudinal beam 1, including a second mounting base 131 whose upper side is fixedly connected to the lower side of the front-axle longitudinal beam 1. The upper side of the second mounting base 131 extends outward, and the extended part is fixedly welded to the side of the front axle longitudinal beam 1 through a reinforcing rib plate 132; Through holes are provided in the lower parts of the two sides of the second mounting base 131, and they are fixedly connected through a first connecting beam 133 penetrating the through holes; Front axle thrust rod pin holes 134 for installing the front axle thrust rod are provided on the sides of the second mounting bases 131 on both sides.

[0050] To provide a mounting basis for the front axle thrust rod and ensure the connection stability of the front axle thrust rod mounting seat assembly 13, the connection strength between the second mounting base 131 and the front axle longitudinal beam 1 is improved by arranging a plurality of reinforcing rib plates 132.

[0051] Fourth axle thrust rod mounting seat assemblies 14 are arranged on the lower sides of the fourth axle longitudinal beams 8 on both sides, including third mounting bases 141. The inner side of any one of the third mounting bases 141 extends upward and is fixedly connected to the inner side of the fourth axle longitudinal beam 8; Through holes are provided in the middle parts of the third mounting bases 141 on both sides, and they are fixedly connected through a second connecting beam 142 penetrating the through holes; Fourth axle thrust rod pin holes 143 for installing the fourth axle thrust rod are provided on the sides of the third mounting bases 141 on both sides.

[0052] The third mounting bases 141 on both sides are connected through the second connecting beam 142. When the fourth axle thrust rods on both sides are under the alternating transverse force, the single-sided bearing is avoided, and the possibility of weld cracking is reduced; Moreover, the fourth axle thrust rod mounting seat assembly 14 and the three-axle cross beam assembly 4 and the fourth-axle cross beam assembly 5 form a triangular structure in the rear-end area of the vehicle frame, effectively strengthening the bending and torsional strength of the vehicle frame.

[0053] The U-shaped casting beam 2 is arranged as a combined welded structure, including front suspension cylinder supports 21 symmetrically arranged at the lower ends of the front axle longitudinal beams 1 on both sides and a front axle cross tie rod support 22 connecting the front suspension cylinder supports 21 on both sides. The two ends of the front axle cross tie rod support 22 are fixedly welded to the lower ends of the front suspension cylinder supports 21; The front suspension cylinder support 21 is bent inward near the connection with the front axle cross tie rod support 22, forming an arc-shaped structure with the front axle cross tie rod support 22.

[0054] Adopting the welded structure can reduce the production difficulty of the U-shaped casting beam 2. Using castings can better ensure the strength and material reliability. The stress concentration areas are designed with arc transitions, which is beneficial to the smooth transition of stress and effectively improves the bearing capacity and reliability.

[0055] The second-bridge crossbeam assembly 3 and the third-bridge crossbeam assembly 4 have the same structure; any second-bridge crossbeam assembly 3 or third-bridge crossbeam assembly 4 includes suspension oil cylinder supports 31 on both sides and a first steel pipe beam 32 for connecting the suspension oil cylinder supports 31 on both sides; At the positions corresponding to the first steel pipe beam 32 on the inner sides of the suspension oil cylinder supports 31 on both sides, first welding pads 33 that can be inserted into the first steel pipe beam 32 are provided; It further includes a first thrust rod mounting seat 34 integrally cast for mounting the second-bridge thrust rod or the third-bridge thrust rod.

[0056] In order to provide a mounting base for the suspension oil cylinders of the axles, hinge seats for mounting the suspension oil cylinders are provided on each crossbeam assembly; at the same time, the steel pipe beam has a low cost, a simple structure, convenient connection, and the weld position avoids the stress concentration position, further preventing weld cracking and improving the connection strength and reliability.

[0057] On both sides of the fourth-bridge crossbeam assembly 5, there are rear suspension oil cylinder supports 51 and a second steel pipe beam 52 for connecting the rear suspension oil cylinder supports 51 on both sides; At the positions corresponding to the first steel pipe beam 32 on the inner sides of the rear suspension oil cylinder supports 51 on both sides, second welding pads 53 that can be inserted into the first steel pipe beam 32 are provided; It further includes a second thrust rod mounting seat 54 integrally cast for mounting the fourth-bridge thrust rod.

[0058] In order to provide a mounting base for the fourth-bridge suspension oil cylinder and at the same time meet the connection of the fourth-bridge thrust rod.

[0059] The second-bridge longitudinal beam 6 and the third-bridge longitudinal beam 7 are welded and fixed through the second-bridge crossbeam assembly 3; the third-bridge longitudinal beam 7 and the fourth-bridge longitudinal beam 8 are welded and fixed through the third-bridge crossbeam assembly 4; the fourth-bridge crossbeam assembly 5 and one end of the fourth-bridge longitudinal beam 8 far from the third-bridge crossbeam assembly 4 are welded and fixed; A welding groove is opened at the edge of the upper surface of the second mounting base 131; At the connection between the front suspension oil cylinder support 21 and the front axle cross tie rod support 22, a welding pad 23 inserted into the front axle cross tie rod support 22 is provided, and a welding groove is opened at the edge of the connection between the front axle cross tie rod support 22 and the front suspension oil cylinder support 21; Welding grooves are opened at the connections of the first welding pad 33, the second welding pad 53, the first steel pipe beam 32, and the second steel pipe beam 52.

[0060] Setting a welding groove on one side of the connection surface increases the welding width, improves the welding stability, avoids weld cracking, and improves the connection strength and reliability.

[0061] When groove welds are formed on both sides of the joint surface, a V-shaped groove is formed, which increases the welding width, improves the welding stability, and the weld position avoids the stress concentration position, further preventing weld cracking and enhancing the connection strength and reliability.

[0062] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0063] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A frame of a four-axle mining dump truck, comprising longitudinally arranged front axle beams (1) and rear axle beams that are symmetrically arranged on the left and right, and a crossbeam assembly for connecting the front axle beams (1) and the rear axle beams, characterized in that: The crossbeam assembly includes a U-shaped casting beam (2), a second-axle crossbeam assembly (3), a third-axle crossbeam assembly (4), and a fourth-axle crossbeam assembly (5); The front axle beam (1) is fixedly connected to the second-axle beam (6) through the U-shaped casting beam (2), The rear axle beam includes a second-axle beam (6), a third-axle beam (7), and a fourth-axle beam (8); The second-axle beam (6) is fixedly connected to the third-axle beam (7) through the second-axle crossbeam assembly (3); the third-axle beam (7) is fixedly connected to the fourth-axle beam (8) through the third-axle crossbeam assembly (4); the fourth-axle crossbeam assembly (5) is fixedly connected to one end of the fourth-axle beam (8) away from the third-axle crossbeam assembly (4).

2. The frame of the four-bridge mining dump truck according to claim 1, wherein: It further includes an integrated mounting base (9) arranged at the lower end of the third-axle beam (7), and the integrated mounting base (9) includes first mounting bases (91) symmetrically arranged and respectively mounted under the third-axle beams (7) on both sides. A through hole is provided in any one of the first mounting bases (91), and a thrust rod mounting pin hole (92) is provided on the side of the first mounting base (91); A lifting cylinder mounting shaft (93) is embedded in the through hole, and the first mounting bases (91) on both sides are connected through a lifting cylinder mounting beam (94) embedded in the through hole; The lifting cylinder mounting shaft (93) is in interference fit with the holes at both ends of the lifting cylinder mounting beam (94) and is fixedly welded to the side of the first mounting base (91).

3. The frame of the four-axle mining dump truck according to claim 2, wherein: A first strengthening crossbeam (10) is arranged between the second-axle beams (6) on both sides. Both ends of the first strengthening crossbeam (10) are perpendicular to the second-axle beams (6) on both sides respectively, and the connection parts at both ends are fixedly welded.

4. The frame of the four-axle mining dump truck according to claim 3, wherein: A second strengthening crossbeam (11) is arranged between the front axle beams (1) on both sides. Both ends of the first strengthening crossbeam (10) are perpendicular to the second-axle beams (6) on both sides respectively, and the connection parts at both ends are fixedly connected by bolts; It further includes a third strengthening crossbeam (12) fixedly installed on the upper side of the U-shaped casting beam (2) by bolts.

5. The frame of the four-bridge mining dump truck according to claim 4, characterized in that: A front axle thrust rod mounting seat assembly (13) is arranged on the lower side of the front axle beams (1) on both sides, including a second mounting base (131) whose upper side is fixedly connected to the lower side of the front axle beam (1); The upper side of the second mounting base (131) extends outward, and the extended part is fixedly welded to the side of the front axle beam (1) through a reinforcing rib plate (132); Through holes are provided in the lower parts of the second mounting bases (131) on both sides, and they are fixedly connected through a first connecting beam (133) passing through the through holes; Front axle thrust rod pin holes (134) for installing the front axle thrust rod are provided on the sides of the second mounting bases (131) on both sides.

6. The frame of the four-bridge mining dump truck according to claim 5, wherein: A fourth-axle thrust rod mounting seat assembly (14) is arranged on the lower side of the fourth-axle beams (8) on both sides, including a third mounting base (141). The inner side of any one of the third mounting bases (141) extends upward and is fixedly connected to the inner side of the fourth-axle beam (8); Through holes are provided in the middle of the third mounting bases (141) on both sides, and they are fixedly connected by a second connecting beam (142) passing through the through holes; Four-bridge push rod pin holes (143) for installing four-bridge push rods are provided on the sides of the third mounting bases (141) on both sides.

7. The frame of the four-axle mining dump truck according to claim 6, characterized in that: The U-shaped casting beam (2) is of a combined welded structure, including front suspension cylinder supports (21) symmetrically arranged and respectively installed at the lower ends of the front axle longitudinal beams (1) on both sides, and a front axle cross tie rod support (22) connecting the front suspension cylinder supports (21) on both sides. The two ends of the front axle cross tie rod support (22) are fixedly welded to the lower ends of the front suspension cylinder supports (21); The front suspension cylinder support (21) is bent inward near the connection with the front axle cross tie rod support (22) to form an arc-shaped structure with the front axle cross tie rod support (22).

8. The frame of the four-axle mining dump truck according to claim 7, wherein: The second-bridge cross beam assembly (3) has the same structure as the third-bridge cross beam assembly (4); any second-bridge cross beam assembly (3) or third-bridge cross beam assembly (4) includes suspension cylinder supports (31) on both sides and a first steel pipe beam (32) for connecting the suspension cylinder supports (31) on both sides; First welding pads (33) that can be inserted into the first steel pipe beam (32) are provided at positions corresponding to the first steel pipe beam (32) on the inner sides of the suspension cylinder supports (31) on both sides; It further includes a first push rod mounting seat (34) integrally cast for installing a second-bridge push rod or a third-bridge push rod.

9. The frame of the four-axle mining dump truck according to claim 8, wherein: On both sides of the fourth-bridge cross beam assembly (5), there are rear suspension cylinder supports (51) and a second steel pipe beam (52) for connecting the rear suspension cylinder supports (51) on both sides; Second welding pads (53) that can be inserted into the first steel pipe beam (32) are provided at positions corresponding to the first steel pipe beam (32) on the inner sides of the rear suspension cylinder supports (51) on both sides; It further includes a second push rod mounting seat (54) integrally cast for installing a four-bridge push rod.

10. The frame of a four-bridge mining dump truck according to claim 9, wherein: The second-bridge longitudinal beam (6) is fixedly welded to the third-bridge longitudinal beam (7) through the second-bridge cross beam assembly (3); the third-bridge longitudinal beam (7) is fixedly welded to the fourth-bridge longitudinal beam (8) through the third-bridge cross beam assembly (4); the fourth-bridge cross beam assembly (5) is fixedly welded to one end of the fourth-bridge longitudinal beam (8) far from the third-bridge cross beam assembly (4); Welding grooves are provided at the edges of the upper surface of the second mounting base (131); A welding pad (23) inserted into the front axle cross tie rod support (22) is provided at the connection between the front suspension cylinder support (21) and the front axle cross tie rod support (22), and welding grooves are provided at the edges of the connection between the front axle cross tie rod support (22) and the front suspension cylinder support (21); Welding grooves are provided at the connections of the first welding pad (33), the second welding pad (53), the first steel pipe beam (32), and the second steel pipe beam (52).

Images