Front suspension system of unmanned mine truck

Abstract

The unmanned mine truck front suspension system comprises a frame (1) and a front axle cross beam assembly (2), front shock absorber upper supports (3) are fixedly arranged on the outer side wall of a left side longitudinal beam and the outer side wall of a right side longitudinal beam of the frame (1), and the two front shock absorber upper supports (3) are connected with the two ends of the front axle cross beam assembly (2) through front shock absorbers (4) respectively; the bottom of a left longitudinal beam and the bottom of a right longitudinal beam of the frame (1) are respectively provided with a guide assembly, and the guide assemblies are connected with the front side face of the front axle cross beam assembly (2). The device has the advantages of being higher in bearing capacity and convenient to replace and maintain.

Description

Technical Field

[0001] The invention relates to a front suspension system, in particular to a front suspension system for an unmanned mining truck. Background Art

[0002] In the prior art, mining trucks usually use leaf spring front suspension or air front suspension. Leaf spring front suspension uses springs made of multiple layers of steel plates to buffer vibrations; air front suspension uses compressed air as an elastic medium and can automatically adjust the height of the vehicle according to the vehicle load. Both leaf spring front suspension and air front suspension have better support and shock absorption effects, ensuring the driver's driving comfort while meeting the load capacity.

[0003] However, with the development and progress of science and technology, new energy commercial electric unmanned mining trucks have gradually occupied a dominant position. Since unmanned mining trucks do not require drivers to drive, the demand for shock absorption effects has been greatly reduced, and the demand for load-bearing capacity has been greatly increased. Therefore, traditional leaf spring suspensions and air front suspensions can no longer meet current needs. It is urgent to develop a front suspension system with stronger load-bearing capacity that is suitable for unmanned mining trucks. Summary of the invention

[0004] The purpose of the present invention is to provide an unmanned mining truck front suspension system to solve the technical problems in the prior art. The system has a stronger load-bearing capacity and is convenient to replace and repair.

[0005] The present invention provides an unmanned mining truck front suspension system, comprising a vehicle frame and a front axle cross beam assembly, front shock absorber upper brackets are fixedly provided on the outer side walls of the left longitudinal beam and the right longitudinal beam of the frame, and the two front shock absorber upper brackets are respectively connected to the two ends of the front axle cross beam assembly through the front shock absorbers; the bottoms of the left longitudinal beam and the right longitudinal beam of the frame are both provided with guide components, and the guide components are connected to the front side surface of the front axle cross beam assembly.

[0006] In the aforementioned unmanned mining truck front suspension system, preferably, the front shock absorber upper bracket includes a top plate, a side plate and a shock absorber mounting plate, the top end of the side plate is fixedly connected to one end of the top plate, the side plate is perpendicular to the top plate, and the bottom of the top plate is fixedly provided with two parallel arranged special-shaped plates, the upper part of the special-shaped plate is rectangular and the lower part is trapezoidal, and the trapezoid is a structure that is wide at the top and narrow at the bottom, and a bottom plate is welded and fixed to the bottom of the two special-shaped plates, and the number of the shock absorber mounting plates is two, the two shock absorber mounting plates are arranged in parallel, and the two shock absorber mounting plates are welded and fixed to the side plate and the bottom plate at the same time.

[0007] In the aforementioned unmanned mining truck front suspension system, preferably, a first circular mounting hole is opened on the two shock absorber mounting plates, the first circular mounting holes on the two shock absorber mounting plates are the same size and coaxial, a first pin is installed in the two first circular mounting holes, and the upper end of the front shock absorber is rotatably connected to the first pin.

[0008] In the aforementioned unmanned mining truck front suspension system, preferably, both ends of the top surface of the front axle crossbeam assembly are provided with shock absorber mounting parts, a second circular mounting hole is opened on the shock absorber mounting part, a second pin is installed in the second circular mounting hole, and the lower end of the front shock absorber is rotatably connected to the second pin.

[0009] In the aforementioned unmanned mining truck front suspension system, preferably, the guide assembly includes a guide bracket, an upper thrust rod and a lower thrust rod, a thrust rod connecting bracket is arranged on the front side surface of the front axle cross beam assembly, one end of the upper thrust rod and the lower thrust rod are rotatably connected to the guide bracket through a third pin shaft, and the other end of the upper thrust rod and the lower thrust rod are rotatably connected to the thrust rod connecting bracket through a fourth pin shaft.

[0010] In the aforementioned unmanned mining truck front suspension system, preferably, the guide bracket includes a first plate body and a second plate body, the first plate body and the second plate body are the same in shape and size, the upper ends of the first plate body and the second plate body are welded and fixed to the frame, one end of the upper thrust rod and the lower thrust rod are located between the first plate body and the second plate body, and are connected to the first plate body and the second plate body through a fifth pin shaft.

[0011] In the aforementioned unmanned mining truck front suspension system, preferably, the thrust rod connecting bracket includes a third plate body and a fourth plate body, the third plate body and the fourth plate body are the same in shape and size, the third plate body and the fourth plate body are both welded and fixed to the front side of the front axle cross beam assembly, the other end of the upper thrust rod and the lower thrust rod are located between the third plate body and the fourth plate body, and are connected to the third plate body and the fourth plate body through a sixth pin shaft.

[0012] In the aforementioned unmanned mining truck front suspension system, preferably, the two guide brackets are fixedly connected via a guide bracket connecting crossbeam.

[0013] The aforementioned unmanned mining truck front suspension system preferably also includes a lower cross beam of the frame, the lower cross beam of the frame is a U-shaped cross beam, the two ends of the lower cross beam of the frame are respectively fixedly connected to the inner side walls of the left longitudinal beam and the right longitudinal beam of the frame, and the bottom surface of the lower cross beam of the frame is provided with two transverse thrust rod mounting plates, the upper end of the transverse thrust rod is located between the two transverse thrust rod mounting plates, and is rotatably connected to the left ends of the two transverse thrust rod mounting plates through a seventh pin shaft, a transverse thrust rod mounting portion is provided at the right end of the top surface of the front axle cross beam assembly, a transverse thrust rod mounting hole is opened on the transverse thrust rod mounting portion, an eighth pin shaft is installed in the transverse thrust rod mounting hole, and the lower end of the transverse thrust rod is rotatably connected to the eighth pin shaft.

[0014] Compared with the prior art, the present invention includes a vehicle frame and a front axle beam assembly, and the outer walls of the left longitudinal beam and the right longitudinal beam of the vehicle frame are fixed with front shock absorber upper brackets, and the two front shock absorber upper brackets are connected to the two ends of the front axle beam assembly through the front shock absorbers respectively; the bottoms of the left longitudinal beam and the right longitudinal beam of the vehicle frame are provided with guide components, and the guide components are connected to the front side of the front axle beam assembly. The present invention connects the vehicle frame to the front axle beam assembly through the front shock absorber upper bracket and the front shock absorber, and guides by setting the guide component, so that the vehicle frame can only move in the vertical direction without generating horizontal displacement. The present invention simplifies the front suspension system in the prior art. Although the shock absorption effect of the present invention is not as good as that of the leaf spring front suspension system and the air front suspension system, the load-bearing capacity of the present invention far exceeds that of the leaf spring front suspension system and the air front suspension system. Since the unmanned mining truck does not need to take a driver, the present invention improves the load-bearing performance by sacrificing the shock absorption performance, thereby improving the working efficiency of the unmanned mining truck. In addition, the present invention has a simple structure and is more convenient for repair and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an axonometric view of the present invention;

[0016] Figure 2 This is the axonometric view of the front shock absorber upper bracket;

[0017] Figure 3 It is a structural schematic diagram of the front axle crossbeam assembly;

[0018] Figure 4 It is a partial structural schematic diagram of the present invention;

[0019] Figure 5 It is a structural diagram of the lower crossbeam and transverse thrust rod of the frame.

[0020] Explanation of the accompanying drawings: frame 1, front axle crossbeam assembly 2, front shock absorber upper bracket 3, front shock absorber 4, top plate 5, side plate 6, shock absorber mounting plate 7, special-shaped plate 8, bottom plate 9, first circular mounting hole 10, shock absorber mounting portion 11, second circular mounting hole 12, guide bracket 13, upper thrust rod 14, lower thrust rod 15, thrust rod connecting bracket 16, first plate body 17, second plate body 18, third plate body 19, fourth plate body 20, guide bracket connecting crossbeam 21, frame lower crossbeam 22, lateral thrust rod mounting plate 23, lateral thrust rod 24, lateral thrust rod mounting hole 25, lateral thrust rod mounting portion 26, horizontal connecting plate 27, reinforcement plate 28. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0022] Embodiments of the present invention: Figure 1-Figure 5 As shown, an unmanned mining truck front suspension system includes a frame 1 and a front axle cross beam assembly 2. Front shock absorber upper brackets 3 are fixedly provided on the outer side walls of the left longitudinal beam and the right longitudinal beam of the frame 1. The two front shock absorber upper brackets 3 are respectively connected to the two ends of the front axle cross beam assembly 2 through the front shock absorbers 4; the bottoms of the left longitudinal beam and the right longitudinal beam of the frame 1 are provided with guide components, and the guide components are connected to the front side of the front axle cross beam assembly 2.

[0023] The front shock absorber upper bracket 3 on the left longitudinal beam and the right longitudinal beam has the same structure, and the two front shock absorber upper brackets 3 are arranged symmetrically. The frame 1 is connected to the front axle cross beam assembly 2 through the two front shock absorber upper brackets 3 and the two front shock absorbers 4. The front shock absorber 4 is used in this application to replace the leaf spring structure and the shock absorbing airbag structure of the front suspension system in the prior art, thereby improving the load-bearing capacity. The front shock absorber 4 is a commercially available product and can be ordered according to demand. The upper limit of the load-bearing capacity of the front shock absorber 4 far exceeds the leaf spring structure and the shock absorbing airbag structure.

[0024] The upper end of the front shock absorber 4 is mounted on the front shock absorber upper bracket 3 , and the lower end is mounted on the front axle crossbeam assembly 2 , which simplifies the installation structure and reduces the difficulty of repairing and maintaining the front shock absorber 4 .

[0025] The setting of the guide assembly enables the vehicle frame 1 to establish a stable connection with the front axle crossbeam assembly 2, thereby improving the stability of the vehicle.

[0026] Specifically, the front shock absorber upper bracket 3 includes a top plate 5, a side plate 6 and a shock absorber mounting plate 7. The top end of the side plate 6 is fixedly connected to one end of the top plate 5. The side plate 6 is perpendicular to the top plate 5. Two parallel special-shaped plates 8 are fixedly provided at the bottom of the top plate 5. The upper part of the special-shaped plate 8 is rectangular and the lower part is trapezoidal, and the trapezoid is a structure that is wide at the top and narrow at the bottom. A bottom plate 9 is welded and fixed to the bottom of the two special-shaped plates 8. There are two shock absorber mounting plates 7. The two shock absorber mounting plates 7 are arranged in parallel, and the two shock absorber mounting plates 7 are welded and fixed to the side plate 6 and the bottom plate 9 at the same time.

[0027] The top plate 5 and the side plate 6 are welded and fixed together. During installation, the side plate 6 on the left front shock absorber upper bracket 3 is welded and fixed to the outer wall surface of the left longitudinal beam of the frame 1, and the side plate 6 on the right front shock absorber upper bracket 3 is welded and fixed to the outer wall surface of the right longitudinal beam of the frame 1.

[0028] The bottom plate 9 is formed by stamping a steel plate. The bottom plate 9 has a first horizontal section, an inclined section and a second horizontal section. The bottom plate 9 is aligned with the bottom surface contour of the special-shaped plate 8 and is welded and fixed. The top plate 5, the two special-shaped plates 8 and the bottom plate 9 form a box structure. The special shape of the special-shaped plate 8 makes the box structure narrow at the bottom and wide at the top. This structure can effectively improve the structural strength of the front shock absorber upper bracket 3 and prevent damage to the front shock absorber upper bracket 3. The bottom plate 9 and the two special-shaped plates 8 are welded and fixed to the side plate 6.

[0029] The shock absorber mounting plate 7 is roughly triangular in shape and has a right-angled side. The top surface of the shock absorber mounting plate 7 is welded and fixed to the bottom plate 9 , and the side surface is welded and fixed to the side plate 6 .

[0030] Both shock absorber mounting plates 7 are provided with a first circular mounting hole 10. The first circular mounting holes 10 on the two shock absorber mounting plates 7 are of the same size and coaxial. First pins are installed in the two first circular mounting holes 10, and the upper end of the front shock absorber 4 is rotatably connected to the first pin.

[0031] Shock absorber mounting parts 11 are provided at both ends of the top surface of the front axle cross beam assembly 2. A second circular mounting hole 12 is opened on the shock absorber mounting part 11. A second pin is installed in the second circular mounting hole 12. The lower end of the front shock absorber 4 is rotatably connected to the second pin.

[0032] When the front shock absorber 4 needs to be disassembled, it is only necessary to support the vehicle frame 1 with a hydraulic jack, and then disassemble the first pin shaft and the second pin shaft to disassemble the front shock absorber 4. Disassembly and installation are simple and quick.

[0033] Furthermore, the guide assembly includes a guide bracket 13, an upper thrust rod 14 and a lower thrust rod 15. A thrust rod connecting bracket 16 is arranged on the front side of the front axle cross beam assembly 2. One end of the upper thrust rod 14 and the lower thrust rod 15 are rotationally connected to the guide bracket 13 through a third pin shaft, and the other end of the upper thrust rod 14 and the lower thrust rod 15 are rotationally connected to the thrust rod connecting bracket 16 through a fourth pin shaft. The two guide brackets 13 are fixedly connected through a guide bracket connecting beam 21.

[0034] The bottoms of the left longitudinal beam and the right longitudinal beam of the vehicle frame 1 are both provided with guide components, so two thrust rod connecting brackets 16 are provided on the front side of the front axle cross beam assembly 2 .

[0035] The two guide brackets 13 are connected to the two thrust rod connecting brackets 16 on the front axle cross beam assembly 2 through the upper thrust rod 14 and the lower thrust rod 15 respectively, so that a stable connection relationship is established between the frame 1 and the front axle cross beam assembly 2, which effectively improves the stability of the vehicle.

[0036] In this embodiment, the guide bracket 13 includes a first plate body 17 and a second plate body 18. The first plate body 17 and the second plate body 18 are the same in shape and size. The upper ends of the first plate body 17 and the second plate body 18 are welded and fixed to the frame 1. One end of the upper thrust rod 14 and the lower thrust rod 15 are located between the first plate body 17 and the second plate body 18, and are connected to the first plate body 17 and the second plate body 18 through a fifth pin shaft.

[0037] The first plate 17 and the second plate 18 are both plates that are approximately inverted triangles with a large upper end and a small lower end. A circular through hole for the guide bracket connecting beam 21 to pass through is provided in the middle of the first plate 17 and the second plate 18. The ends of the guide bracket connecting beam 21 pass through the first plate 17 and the second plate 18, and the first plate 17 and the second plate 18 are welded and fixed to the guide bracket connecting beam 21. In order to ensure the connection strength, a plurality of triangular reinforcing ribs are also welded between the guide bracket connecting beam 21 and the second plate 18. The first plate 17 and the second plate 18 are connected by a reinforcing plate 28 on the side facing the front end of the vehicle. The setting of the reinforcing plate 28 can effectively prevent the first plate 17 and the second plate 18 from deforming.

[0038] The thrust rod connecting bracket 16 includes a third plate body 19 and a fourth plate body 20. The third plate body 19 and the fourth plate body 20 are the same in shape and size. The third plate body 19 and the fourth plate body 20 are welded and fixed to the front side of the front axle cross beam assembly 2. The other ends of the upper thrust rod 14 and the lower thrust rod 15 are located between the third plate body 19 and the fourth plate body 20, and are respectively connected to the third plate body 19 and the fourth plate body 20 through the sixth pin shaft.

[0039] Furthermore, a lower frame cross beam 22 is fixedly provided at the bottom of the frame 1. The lower frame cross beam 22 is a U-shaped cross beam. The two ends of the lower frame cross beam 22 are respectively welded and fixed to the inner side walls of the left longitudinal beam and the right longitudinal beam of the frame 1. In order to ensure the connection strength between the lower frame cross beam 22 and the left longitudinal beam and the right longitudinal beam, horizontal connecting plates 27 are preferably welded to the outer walls at both ends of the lower frame cross beam 22. The horizontal connecting plates 27 at both ends of the lower frame cross beam 22 are respectively fixedly connected to the bottom surfaces of the left longitudinal beam and the right longitudinal beam through bolt assemblies.

[0040] Two transverse thrust rod mounting plates 23 are provided on the bottom surface of the lower cross beam 22 of the frame. The upper end of the transverse thrust rod 24 is located between the two transverse thrust rod mounting plates 23 and is rotatably connected to the left ends of the two transverse thrust rod mounting plates 23 through the seventh pin shaft. A transverse thrust rod mounting portion 26 is provided at the right end of the top surface of the front axle cross beam assembly 2. A transverse thrust rod mounting hole 25 is opened on the transverse thrust rod mounting portion 26. An eighth pin shaft is installed in the transverse thrust rod mounting hole 25. The lower end of the transverse thrust rod 24 is rotatably connected to the eighth pin shaft.

[0041] The arrangement of the lower crossbeam 22 and the lateral thrust rod 24 of the frame further improves the lateral stability of the mining truck. When the vehicle is driving on a slope road or a road with large potholes in a mine, the design of this structure can avoid wheel deviation and reduce the risk of accidents such as rollover. Even if the front shock absorber 4 on one side is damaged, it will not cause the mining truck to roll over.

[0042] This application optimizes the front suspension system of unmanned mining trucks. Due to the small number of parts, the failure probability is relatively low. Compared with the front suspension structure in the prior art, it is less likely to fail in the harsh environment of the mine, such as dusty and frequent stone collisions. Maintenance personnel can understand and maintain it more easily. When there is a problem with the vehicle, they can quickly perform maintenance, reduce the downtime of the vehicle, and improve the efficiency of mining operations.

[0043] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. An unmanned mining truck front suspension system, comprising a vehicle frame (1) and a front axle crossbeam assembly (2), characterized in that: Front shock absorber upper brackets (3) are fixedly provided on the outer side walls of the left longitudinal beam and the right longitudinal beam of the vehicle frame (1), and the two front shock absorber upper brackets (3) are respectively connected to the two ends of the front axle cross beam assembly (2) through the front shock absorbers (4); and guide components are provided at the bottom of the left longitudinal beam and the right longitudinal beam of the vehicle frame (1), and the guide components are connected to the front side surface of the front axle cross beam assembly (2).

2. The unmanned mining truck front suspension system according to claim 1 is characterized in that: The front shock absorber upper bracket (3) comprises a top plate (5), a side plate (6) and a shock absorber mounting plate (7); the top end of the side plate (6) is fixedly connected to one end of the top plate (5); the side plate (6) is perpendicular to the top plate (5); the bottom of the top plate (5) is fixedly provided with two parallelly arranged special-shaped plates (8); the upper part of the special-shaped plates (8) is rectangular and the lower part is trapezoidal, and the trapezoid is a structure that is wide at the top and narrow at the bottom; the bottoms of the two special-shaped plates (8) are welded and fixed with a bottom plate (9); the number of the shock absorber mounting plates (7) is two; the two shock absorber mounting plates (7) are arranged in parallel, and the two shock absorber mounting plates (7) are welded and fixed to the side plate (6) and the bottom plate (9) at the same time.

3. The unmanned mining truck front suspension system according to claim 2 is characterized in that: A first circular mounting hole (10) is formed on the two shock absorber mounting plates (7); the first circular mounting holes (10) on the two shock absorber mounting plates (7) are of the same size and are coaxial; a first pin is installed in the two first circular mounting holes (10); and the upper end of the front shock absorber (4) is rotatably connected to the first pin.

4. The unmanned mining truck front suspension system according to claim 3 is characterized in that: Shock absorber mounting parts (11) are provided at both ends of the top surface of the front axle cross beam assembly (2), a second circular mounting hole (12) is provided on the shock absorber mounting part (11), a second pin is installed in the second circular mounting hole (12), and the lower end of the front shock absorber (4) is rotatably connected to the second pin.

5. The unmanned mining truck front suspension system according to claim 1 is characterized in that: The guide assembly comprises a guide bracket (13), an upper thrust rod (14) and a lower thrust rod (15); a thrust rod connecting bracket (16) is arranged on the front side of the front axle cross beam assembly (2); one end of the upper thrust rod (14) and the lower thrust rod (15) are rotatably connected to the guide bracket (13) via a third pin shaft, and the other end of the upper thrust rod (14) and the lower thrust rod (15) are rotatably connected to the thrust rod connecting bracket (16) via a fourth pin shaft.

6. The unmanned mining truck front suspension system according to claim 5 is characterized in that: The guide bracket (13) comprises a first plate body (17) and a second plate body (18); the first plate body (17) and the second plate body (18) are of the same shape and size; the upper ends of the first plate body (17) and the second plate body (18) are welded and fixed to the vehicle frame (1); one end of the upper thrust rod (14) and the lower thrust rod (15) are located between the first plate body (17) and the second plate body (18), and are connected to the first plate body (17) and the second plate body (18) via a fifth pin shaft.

7. The unmanned mining truck front suspension system according to claim 6 is characterized in that: The thrust rod connecting bracket (16) comprises a third plate body (19) and a fourth plate body (20), the third plate body (19) and the fourth plate body (20) are of the same shape and size, the third plate body (19) and the fourth plate body (20) are both welded and fixed to the front side of the front axle cross beam assembly (2), the other ends of the upper thrust rod (14) and the lower thrust rod (15) are located between the third plate body (19) and the fourth plate body (20), and are connected to the third plate body (19) and the fourth plate body (20) via a sixth pin shaft.

8. The unmanned mining truck front suspension system according to claim 7 is characterized in that: The two guide brackets (13) are fixedly connected via a guide bracket connecting crossbeam (21).

9. The unmanned mining truck front suspension system according to claim 1, characterized in that: The vehicle frame also includes a lower cross beam (22) of the vehicle frame, wherein the lower cross beam (22) of the vehicle frame is a U-shaped cross beam, and the two ends of the lower cross beam (22) of the vehicle frame are respectively fixedly connected to the inner side walls of the left longitudinal beam and the right longitudinal beam of the vehicle frame (1), and the bottom surface of the lower cross beam (22) of the vehicle frame is provided with two transverse thrust rod mounting plates (23), and the upper end of the transverse thrust rod (24) is located between the two transverse thrust rod mounting plates (23) and is rotatably connected to the left ends of the two transverse thrust rod mounting plates (23) through a seventh pin shaft, and the right end of the top surface of the front axle cross beam assembly (2) is provided with a transverse thrust rod mounting portion (26), and the transverse thrust rod mounting portion (26) is provided with a transverse thrust rod mounting hole (25), and an eighth pin shaft is installed in the transverse thrust rod mounting hole (25), and the lower end of the transverse thrust rod (24) is rotatably connected to the eighth pin shaft.

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