Off-highway mining dump truck and unloading method

Abstract

The invention relates to the technical field of mining dump trucks, in particular to an off-highway mining dump truck and an unloading method. The vehicle comprises a vehicle frame, a vehicle hopper and a transfer device, wherein the transfer device is located below the vehicle hopper; the car hopper comprises a car hopper body and a discharging door assembly, the car hopper body is hinged to the car frame in a turnover mode, and the discharging door assembly is rotatably installed at the rear end of the car hopper body so as to open or close a discharging opening; the transfer device comprises a conveying mechanism which can horizontally move in the front-back direction and can be horizontally and rotatably connected to the frame. The transfer device is arranged, and the conveying mechanism in the transfer device can horizontally move in the front-back direction and rotate in the horizontal direction, so that materials in the car hopper body are conveyed into the tunnel through conveying of the conveying mechanism, the materials can be accurately poured into the target tunnel without manual work, manual secondary carrying is omitted, and the working efficiency is improved. The labor intensity of workers is greatly reduced, and the discharging accuracy and the discharging efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of mining dump truck technology, and in particular to an off-highway mining dump truck and a method for unloading materials. Background Technology

[0002] Off-highway mining dump trucks are heavy-duty transport vehicles specifically designed for off-highway scenarios such as open-pit mines and water conservancy projects. They primarily undertake the tasks of ore and soil stripping and transportation, and are characterized by large load capacity (20-363 tons), strong torsional rigidity of the chassis, and the use of engineering tires and hydropneumatic suspension. Due to their excessive width and total mass, they are not permitted to travel on highways. Off-highway mining dump trucks are characterized by short transport distances and heavy loads, and are commonly used for loading with large electric or hydraulic shovels, shuttling between mining and unloading points.

[0003] Currently, all existing off-highway mining dump trucks use hydraulic rods to tilt the truck bed, thereby achieving the function of unloading. However, because the end of the truck bed furthest from the cab is flush with the end of the chassis furthest from the cab, for safety reasons and to prevent the wheels from falling into the pit, the end of the truck bed furthest from the cab is often a certain distance away from the target pit when unloading materials. That is, the material is unloaded onto the ground, and then manually moved into the pit. This method significantly increases the labor intensity of workers, and also reduces the accuracy and efficiency of unloading, wasting a lot of time.

[0004] Therefore, there is an urgent need for an off-highway mining vehicle that can accurately unload materials into the tunnel, thereby reducing the labor intensity of workers, improving unloading accuracy and efficiency, and saving time. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an off-highway mining dump truck and unloading method, which solves the technical problem that the existing off-highway mining dump trucks cannot accurately unload materials to the designated location, resulting in the need for manual handling of materials to the designated location, which greatly increases labor intensity and reduces unloading efficiency and unloading accuracy.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] On one hand, the present invention provides a coal mine transport vehicle, including a frame, a truck bed, and a transfer device, the transfer device being located below the truck bed; the truck bed includes a truck bed body and a discharge gate assembly, the truck bed body being hinged to the frame in a flip-up manner, and the discharge gate assembly being rotatably mounted on the rear end of the truck bed body to open or close the discharge port; the transfer device includes a conveying mechanism connected to the frame that can move horizontally in the front-rear direction and rotate horizontally; when the conveying mechanism is in the front position, it is hidden below the truck bed; the truck bed body is horizontally arranged, and when the discharge gate assembly closes the discharge port, it is in a loading posture; the truck bed body is inclined relative to the conveying mechanism, and when the conveying mechanism moves to the rear position and rotates left and right to a target angle, and the discharge gate assembly opens the discharge port toward the conveying mechanism, it is in a discharging posture, and the conveying mechanism can transport the unloaded material from the discharge port to the target position.

[0010] Preferably, the transfer device further includes a movable plate and a rotating mechanism. The movable plate is horizontally movable on the frame in the front-to-back direction, and the rotating mechanism is fixedly installed inside the movable plate. The rotating end of the rotating mechanism passes through the movable plate and is fixedly connected to the bottom of the conveying mechanism to drive the conveying mechanism to rotate horizontally. The off-highway mining dump truck also includes a transmission device, which includes a first driving member, a transmission mechanism, and a threaded rod. The first driving member and the transmission mechanism are both fixedly installed inside the frame. The top of the frame has a groove extending in the front-to-back direction. The threaded rod is rotatably installed in the groove along its extension direction, and both ends of the transmission mechanism are respectively connected to the driving end of the first driving member and one end of the threaded rod. The bottom of the movable plate has a sliding seat, which is placed in the groove and screwed onto the threaded rod. The driving end of the first driving member can drive the threaded rod to rotate through the transmission mechanism, so as to simultaneously drive the sliding seat and the movable plate to move horizontally back and forth along the axis of the threaded rod, thereby changing the conveying position of the conveying mechanism.

[0011] Preferably, the transmission mechanism includes a first worm gear and a first worm; the first worm is horizontally arranged in the front-rear direction, and one end of the first worm is fixedly connected to the driving end of the first driving member, and the other end is rotatably connected to the frame; the first worm gear is vertically arranged in the frame and fixedly connected to one end of the threaded rod; the first worm gear meshes with the first worm so that the driving end of the first driving member can drive the first worm to rotate, thereby causing the first worm gear and the threaded rod to rotate simultaneously and coaxially.

[0012] Preferably, the rotating mechanism includes a second driving member, a second worm gear, a second worm, and a rotating shaft; the second driving member, the second worm, and the second worm gear are all horizontally arranged, and the driving end of the second driving member is fixedly connected to one end of the second worm. The second worm gear meshes with the second worm. The rotating shaft is vertically arranged and coaxial with the second worm gear. One end of the rotating shaft is fixedly connected to the second worm gear, and the other end passes through the moving plate and is fixedly connected to the bottom of the conveying mechanism; the driving end of the second driving member can drive the second worm to rotate, so as to simultaneously drive the second worm gear, the rotating shaft, and the conveying mechanism to rotate around the axis of the rotating shaft, thereby changing the conveying orientation of the conveying mechanism.

[0013] Preferably, the conveying mechanism includes a conveyor frame, a third drive member, a conveyor belt, a drive roller, a driven roller, and multiple auxiliary rollers; the bottom of the conveyor frame is fixedly connected to the top of the conveyor shaft; the drive roller, driven roller, and multiple auxiliary rollers are all horizontally arranged along the left-right direction of the frame and rotatably installed inside the conveyor frame, and the drive roller, driven roller, and multiple auxiliary rollers are spaced apart along the front-rear direction of the frame; the conveyor belt is sleeved on the drive roller, driven roller, and multiple auxiliary rollers; the third drive member is fixedly installed on the outer wall of the conveyor frame, and the drive end of the third drive member passes through the conveyor frame and is fixedly connected to the drive roller, so that the drive end of the third drive member can drive the drive roller to rotate, so as to synchronously drive the driven roller and multiple auxiliary rollers to rotate, and enable the conveyor belt to convey materials towards the rear of the frame.

[0014] Preferably, the conveying mechanism further includes a guide plate; the guide plate is fixedly installed at the rear end of the conveyor frame and is inclined downwards and backwards to guide the material conveyed by the conveyor belt.

[0015] Preferably, the unloading gate assembly includes a gate panel and two first telescopic cylinders; the fixed end of the first telescopic cylinder is hinged to the frame, and the telescopic end of the first telescopic cylinder is hinged to the bottom of the truck body, with the rear end of the truck body serving as the unloading port; the gate panel is hinged to the top of the unloading port of the truck body, the fixed ends of the two first telescopic cylinders are respectively hinged to the left and right side walls of the truck body, and the telescopic ends of the two first telescopic cylinders are respectively hinged to the left and right side walls at the bottom of the gate panel; the two first telescopic cylinders can extend and retract simultaneously, thereby driving the gate panel to rotate around its hinge axis with the truck body, for opening or closing the unloading port.

[0016] Preferably, an arc-shaped protrusion is provided on the bottom outer wall of the rear end of the truck body. The arc-shaped protrusion extends in the left and right direction of the truck body and protrudes towards the door panel. An arc-shaped groove corresponding to the arc-shaped protrusion is provided at the front end of the door panel. The arc-shaped groove can fit tightly with the arc-shaped protrusion so that the door panel can seal the truck body.

[0017] Preferably, the truck bed further includes two guide blocks; both guide blocks are fixedly installed inside the truck bed body and are respectively fixedly connected to the inner walls of the left and right sides of the truck bed body, and both guide blocks are located at the rear end of the truck bed body and are symmetrically arranged with respect to the centerline of the truck bed body in the front-rear direction; the opposite side walls of the two guide blocks are both inclined surfaces, and the inclined surfaces slope from front to back toward the centerline of the truck bed body in the front-rear direction to reduce the size of the discharge port.

[0018] On the other hand, the present invention provides an unloading method, including the above-mentioned off-highway mining dump truck, and further comprising the following steps:

[0019] S1: The conveying mechanism moves to the rear position and rotates left and right to the target angle;

[0020] S2: Drive the bucket body to rotate to the rear of the frame to a specified angle, and then drive the unloading gate assembly to open the unloading port, so that the material in the bucket body is poured into the conveying mechanism;

[0021] S3: The conveyor mechanism transports the material to the target location.

[0022] (III) Beneficial Effects

[0023] The beneficial effects of this invention are:

[0024] This invention discloses an off-highway mining dump truck and its unloading method. By incorporating a transfer device, the conveying mechanism within this device can move horizontally in the front-to-back direction and rotate horizontally. In the unloading posture, it can move to the rear end of the truck bed and adjust to a target angle, causing the unloading gate assembly to open its unloading port towards the conveying mechanism. This allows the material in the truck bed to be directly conveyed to the target location via the conveying mechanism. Specifically, during unloading, the conveying mechanism is moved rearward to approach or be positioned above the target tunnel. Then, the conveying mechanism is rotated to the target angle, ensuring its output position is precisely aligned with the target tunnel. Finally, the truck bed is tilted, and the unloading gate assembly is driven to open the unloading port, allowing the material in the truck bed to be poured into the conveying mechanism. Through the conveying mechanism, the material is accurately transported into the tunnel. This achieves precise unloading of material into the target tunnel without manual intervention, eliminating the need for secondary manual handling, significantly reducing labor intensity, and improving unloading accuracy and efficiency. Moreover, compared with the prior art, the present invention can keep the wheels away from the pit during unloading, thus avoiding the dump truck from accidentally falling into the pit due to the wheels being close to the pit, thereby reducing safety risks. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a non-highway mining dump truck and unloading method according to the present invention when the dump truck is in the loading posture.

[0026] Figure 2 This is a schematic diagram of the overall side structure of a non-highway mining dump truck and unloading method according to the present invention when the dump truck is in the loading posture.

[0027] Figure 3 This is a schematic cross-sectional view of the dump truck in the loading posture of a non-highway mining dump truck and unloading method according to the present invention.

[0028] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0029] Figure 5 This is a schematic diagram of the overall three-dimensional structure of a transfer device for an off-highway mining dump truck and unloading method according to the present invention.

[0030] Figure 6 This is a schematic diagram of the disassembled structure of the rotating mechanism of an off-highway mining dump truck and unloading method according to the present invention.

[0031] Figure 7 This is a schematic diagram of the overall three-dimensional structure of the frame of a non-highway mining dump truck and unloading method according to the present invention;

[0032] Figure 8 This is a schematic diagram of the overall side structure of a non-highway mining dump truck and its unloading method according to the present invention when the dump truck is in the unloading posture.

[0033] [Explanation of Labels in the Attached Images]

[0034] 1: Chassis; 11: Slide groove; 12: Guide groove; 13: Guide rod; 2: Cargo bucket; 21: Cargo bucket body; 22: Unloading gate assembly; 221: Gate panel; 2211: Arc-shaped groove; 222: First telescopic cylinder; 23: Guide block; 24: Adapter seat; 3: Transfer device; 31: Moving plate; 311: Guide arc groove; 32: Rotating mechanism; 321: Second driving component; 322: Second worm gear; 323: Second worm; 324: Rotating shaft; 33: Conveying mechanism; 331: Conveying frame; 332: Third driving component; 333: Conveyor belt; 334: Driving roller; 335: Driven roller; 336: Auxiliary roller; 337: Guide plate; 338: Support frame; 339: Guide block; 34: Slide; 35: Guide seat; 4: Transmission device; 41: First driving component; 42: Transmission mechanism; 421: First worm gear; 422: First worm; 43: Threaded rod; 5: Arc-shaped protrusion; 6: Second telescopic cylinder; 7: Mounting frame; 71: Supporting vertical rod; 72: Reinforcing horizontal rod; 73: Support rod. Detailed Implementation

[0035] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0036] Example 1

[0037] A coal mine transport vehicle according to this embodiment includes a frame 1, a cargo box 2, and a transfer device 3, with the transfer device 3 located below the cargo box 2.

[0038] Specifically, such as Figures 1-3 As shown, the truck bed 2 includes a truck bed body 21 and an unloading gate assembly 22. The truck bed body 21 is hinged to the frame 1 in a flip-out manner, and the unloading gate assembly 22 is rotatably mounted on the rear end of the truck bed body 21 to open or close the unloading port. Figure 5 As shown, the transfer device 3 includes a conveying mechanism 33 connected to the frame 1, which is horizontally movable and rotatable in the front-rear direction. When in the front position, the conveying mechanism 33 is hidden under the truck bed 2. Here, "hidden" means that the conveying mechanism 33 does not exceed the length of the frame 1, i.e., the conveying mechanism 33 does not extend rearward relative to the frame 1. Figures 1-3 As shown, the truck bed body 21 is horizontally positioned, and when the unloading gate assembly 22 closes the unloading port, it is in a loading posture. Figure 8As shown, the truck bed body 21 is inclined relative to the conveying mechanism 33. When the conveying mechanism 33 moves to the rear position and rotates left and right to the target angle, and the unloading gate assembly 22 opens the unloading port towards the conveying mechanism 33, it is in the unloading posture. The conveying mechanism 33 can transport the unloaded material from the unloading port to the target position. By setting up the transfer device 3, and the conveying mechanism 33 in the transfer device can move horizontally in the front-back direction and rotate horizontally, and in the unloading posture, it can move to the rear end of the truck bed 2 and adjust to the target angle, so that the unloading gate assembly 22 opens the unloading port towards the conveying mechanism 33, so that the material in the truck bed 2 can be directly transported to the target position through the conveying mechanism 33. During unloading, the conveying mechanism 33 is moved rearward to approach or be positioned above the target tunnel. Then, the conveying mechanism 33 is rotated to the target angle, ensuring its output position is precisely aligned with the target tunnel. Finally, the truck bed 21 is tilted, and the unloading gate assembly 22 is driven to open the unloading port, allowing the material inside the truck bed 21 to be poured into the conveying mechanism 33. Through the conveying mechanism 33, the material is accurately transported into the tunnel, achieving precise unloading into the target tunnel without manual intervention. This eliminates the need for secondary manual handling, significantly reducing labor intensity and improving unloading accuracy and efficiency. Furthermore, compared to existing technologies, this embodiment ensures that the wheels are away from the tunnel during unloading, preventing the dump truck from accidentally falling into the tunnel due to wheel proximity, thus reducing safety risks.

[0039] It should be noted that when the aforementioned conveying mechanism 33 rotates to the target angle, this target angle can be 0°, meaning the target position is directly behind the chassis 1. In this case, the conveying mechanism 33 does not need to rotate, and the front and rear center lines of the conveying mechanism 33 are parallel to the front and rear center lines of the chassis 1. Of course, the target angle can also be other angles, depending on the target conveying position on site.

[0040] Furthermore, such as Figure 3 and Figure 4As shown, the transfer device 3 also includes a movable plate 31 and a rotating mechanism 32. The movable plate 31 is horizontally movable on the frame 1 in the front-to-back direction to adjust the position of the conveying mechanism 33 and extend the material dumping distance. The rotating mechanism 32 is fixedly installed inside the movable plate 31, i.e., the movable plate 31 has an installation space to facilitate the installation of the rotating mechanism 32. The rotating end of the rotating mechanism 32 passes through the movable plate 31 and is fixedly connected to the bottom of the conveying mechanism 33 to drive the conveying mechanism 33 to rotate horizontally, thereby adjusting the conveying angle of the conveying mechanism 33, i.e., the conveying orientation, to ensure that the material is not conveyed to the target position. The off-highway mining dump truck also includes a transmission device 4, which includes a first driving component 41, a transmission mechanism 42, and a threaded rod 43. Both the first drive component 41 and the transmission mechanism 42 are fixedly installed inside the frame 1. The top of the frame 1 has a groove 11 extending in the front-rear direction. The threaded rod 43 is rotatably installed in the groove 11 along its extension direction. The two ends of the transmission mechanism 42 are respectively connected to the drive end of the first drive component 41 and one end of the threaded rod 43. The bottom of the moving plate 31 is provided with a slide seat 34, which is placed in the groove 11 and screwed onto the threaded rod 43 to limit the moving direction and trajectory of the moving plate 31, preventing the moving plate 31 from tilting or deflecting, thus improving the stability of the dump truck. The driving end of the first driving component 41 can drive the threaded rod 43 to rotate through the transmission mechanism 42, thereby simultaneously driving the slide 34 and the moving plate 31 to move horizontally back and forth along the axis of the threaded rod 43. This changes the conveying position of the conveying mechanism 33, ensuring that the conveying mechanism 33 can be driven by the moving plate 31 and moved to the designated position. This allows the conveying mechanism 33 to be accurately positioned at the designated location, i.e., above the tunnel, improving the unloading accuracy of the dump truck. Moreover, by setting the threaded rod 43, it ensures that the moving plate 31 moves smoothly and accurately through the smooth rotation of the threaded rod 43 when the slide 34 and the threaded rod 43 are screwed together. It also makes the moving speed of the moving plate 31 uniform, improving the moving stability of the moving plate 31.

[0041] Furthermore, such as Figure 4As shown, the transmission mechanism 42 includes a first worm gear 421 and a first worm 422. The first worm 422 is horizontally arranged in the front-to-back direction, and one end of the first worm 422 is fixedly connected to the driving end of the first driving member 41, while the other end is rotatably connected to the frame 1. The first worm gear 421 is vertically arranged inside the frame 1 and is fixedly connected to one end of the threaded rod 43. The first worm gear 421 meshes with the first worm 422 so that the driving end of the first driving member 41 can drive the first worm 422 to rotate, thereby causing the first worm gear 421 and the threaded rod 43 to rotate simultaneously and coaxially. By setting the first worm gear 421 and the first worm 422, it has a self-locking function. When there is no need to adjust the position of the moving plate 31, the first drive component 41 stops working. At this time, there will be no relative movement between the first worm 422 and the first worm wheel 421, which can keep the threaded rod 43 in a fixed state, thereby making the moving plate 31 stably stay in the designated position. This prevents the moving plate 31 from moving unexpectedly due to vibration or material impact during unloading, and also prevents the moving plate 31 from moving unexpectedly due to road bumps during dump truck transportation.

[0042] Furthermore, such as Figure 6As shown, the rotating mechanism 32 includes a second driving member 321, a second worm gear 322, a second worm 323, and a rotating shaft 324. The second driving member 321, the second worm 323, and the second worm gear 322 are all horizontally arranged. The driving end of the second driving member 321 is fixedly connected to one end of the second worm 323. The second worm gear 322 meshes with the second worm 323. The rotating shaft 324 is vertically arranged and coaxial with the second worm gear 322. One end of the rotating shaft 324 is fixedly connected to the second worm gear 322, and the other end passes through the moving plate 31 and is fixedly connected to the bottom of the conveying mechanism 33. The driving end of the second driving member 321 can drive the second worm 323 to rotate, thereby simultaneously driving the second worm gear 322, the rotating shaft 324, and the conveying mechanism 33 to rotate around the axis of the rotating shaft 324. This changes the conveying orientation of the conveying mechanism 33, ensuring that the material can be accurately conveyed to the target tunnel by the conveying mechanism 33. Furthermore, regardless of the location of the tunnel on the dump truck, the second drive component 321 can drive the second worm gear 323 to rotate, and through the cooperation of the second worm wheel 322 and the rotating shaft 324, drive the conveying mechanism 33 to rotate towards the target tunnel. This allows the conveying mechanism 33 to accurately convey materials into the target tunnel, improving the adaptability and versatility of the dump truck. Moreover, the second worm wheel 322 and the second worm gear 323 also have a self-locking function, preventing accidental rotation during unloading and transportation. This ensures that the conveying mechanism 33 will not rotate if the second drive component 321 does not drive the second worm gear 323, improving safety. The rotating mechanism 32 also includes a housing to protect the second drive component 321, the second worm wheel 322, the second worm gear 323, and the rotating shaft 324, preventing dust and other impurities from affecting their transmission.

[0043] Furthermore, such as Figure 1 , Figure 2 and Figure 8As shown, the unloading gate assembly 22 includes a gate panel 221 and two first telescopic cylinders 222. The fixed end of the first telescopic cylinder 222 is hinged to the frame 1, and the telescopic end of the first telescopic cylinder 222 is hinged to the bottom of the truck bed body 21. The rear end of the truck bed body 21 is the unloading port. The gate panel 221 is hinged to the top of the unloading port of the truck bed body 21. The fixed ends of the two first telescopic cylinders 222 are respectively hinged to the left and right side walls of the truck bed body 21, and the telescopic ends of the two first telescopic cylinders 222 are respectively hinged to the left and right side walls at the bottom of the gate panel 221. The two first telescopic cylinders 222 can extend and retract simultaneously, so as to drive the gate panel 221 to rotate around its hinge axis with the truck bed body 21, for opening or closing the unloading port. By setting two first telescopic cylinders 222, which extend and retract simultaneously to drive the door panel 221 to rotate, the door panel 221 can be opened and closed smoothly and synchronously, avoiding displacement or jamming of the door panel 221 due to uneven force, thus improving the stability and reliability of the unloading door assembly 22. Moreover, by driving the door panel 221 to rotate through the two first telescopic cylinders 222, the size of the unloading port can also be changed, thereby adjusting the rate and quantity of material dumping. This prevents the material from overflowing from the conveying mechanism 33 due to excessively fast dumping speed, excessive quantity, or slow conveying speed of the conveying mechanism 33, thus avoiding any impact on the dump truck.

[0044] It should be noted that, for example Figure 1 , Figure 2 and Figure 8As shown, this embodiment also includes a second telescopic cylinder 6 and a mounting frame 7. Specifically, the second telescopic cylinder 6 is vertically arranged, and its fixed end is hinged to the frame 1, while its telescopic end is hinged to the bottom of the truck bed body 21, for driving the truck bed body 21 to tilt. The mounting frame 7 includes four supporting vertical rods 71, multiple reinforcing horizontal rods 72, and support rods 73. The four supporting vertical rods 71 ​​are respectively fixedly installed on the outer wall of the frame 1, with two supporting vertical rods 71 ​​on each side. The tops of the two supporting vertical rods 71 ​​closer to the cab are fixedly connected as a single structure by the support rods 73, and the two supporting vertical rods 71 ​​on the same side are fixedly connected as a single structure by the two reinforcing horizontal rods 72. The tops of the two supporting vertical rods 71 ​​farther from the cab are hinged to the bottom of the truck bed body 21 by a hinge shaft. Thus, by driving the telescopic end of the second telescopic cylinder 6, the truck bed body 21 can be tilted around the axis of the hinge shaft, thereby switching between loading and unloading postures. The support rod 73 is a round rod. Correspondingly, an adapter seat 24 is installed at the bottom of the truck bed body 21 near the cab. The side of the adapter seat 24 facing the support rod 73 has an arc-shaped structure consistent with the upper part of the outer contour of the support rod 73. This allows the adapter seat 24 to firmly abut against the outer wall of the support rod 73 when the truck bed body 21 is in the loading posture. This allows the support rod 73 to provide support and protection for the truck bed body 21, preventing accidental extension or retraction of the dump truck due to road bumps and the structure of the second telescopic cylinder 6 during the dump truck's movement, thus preventing the truck bed body 21 from colliding with the outer wall of the cab. Of course, only one second telescopic cylinder 6 can be used. The appropriate second telescopic cylinder 6 can be selected according to the load of the dump truck. For example, if the load of the dump truck is 30 tons to 60 tons, a hydraulic cylinder with a primary cylinder diameter range of 150mm to 180mm and a system rated pressure of 16MPa to 21MPa can be used. The dump truck has a load capacity of 60-120 tons and can use hydraulic cylinders with a primary cylinder diameter range of 180mm-240mm and a system rated pressure of 21MPa-25MPa. Alternatively, two or more cylinders can be used to ensure that the second telescopic cylinder 6 can stably pull and push the truck bed 2, preventing the hinge between the second telescopic cylinder 6 and the truck bed body 21 from breaking due to excessive material weight inside the truck bed 2, thus preventing potential hazards. The mounting frame 7 is also made of high-hardness steel, such as Q690 steel, to stably support the truck bed 2.

[0045] Furthermore, such as Figure 3 and Figure 8As shown, an arc-shaped protrusion 5 is provided on the bottom outer wall of the rear end of the truck body 21. The arc-shaped protrusion 5 extends along the left and right direction of the truck body 21 and protrudes towards the door panel 221. An arc-shaped groove 2211 corresponding to the arc-shaped protrusion 5 is provided at the front end of the door panel 221. The arc-shaped groove 2211 can fit tightly with the arc-shaped protrusion 5 so that the door panel 221 can seal the truck body 21, preventing fine materials or dust from spilling from the gap between the door panel 221 and the unloading port during loading and transportation, thus reducing material loss and environmental pollution. At the same time, it has a certain guiding function. During the closing process of the door panel 221, the tight fit between the arc-shaped groove 2211 and the arc-shaped protrusion 5 ensures that the door panel 221 is closed in place, further improving the sealing reliability. At the same time, it prevents the door panel 221 from shifting or jamming when closing, improving the operational stability of the unloading door assembly 22.

[0046] Furthermore, such as Figure 1 , Figure 3 and Figure 8 As shown, the bucket 2 also includes two guide blocks 23. Both guide blocks 23 are fixedly installed inside the bucket body 21 and are respectively fixedly connected to the left and right inner walls of the bucket body 21. Both guide blocks 23 are located at the rear end of the bucket body 21 and are symmetrically arranged along the centerline of the bucket body 21 in the front-to-back direction. The opposite side walls of the two guide blocks 23 are inclined surfaces, and these inclined surfaces slope towards the centerline of the bucket body 21 in the front-to-back direction to reduce the size of the discharge port. By setting two symmetrical guide blocks 23, their inclined surfaces can guide and converge the material when the bucket body 21 is dumped, allowing the material inside the bucket body 21 to flow out from the reduced discharge port in a concentrated manner. This avoids the material being scattered during dumping, preventing some material from falling onto the conveyor belt 333 and improving the accuracy of unloading.

[0047] Furthermore, such as Figure 7 and Figure 8 As shown, the slide groove 11 is located in the middle of the frame 1. Two guide grooves 12 are also formed on the top of the frame 1, located on either side of the slide groove 11, and both guide grooves 12 are parallel to the slide groove 11 and have the same length. A guide rod 13 is fixedly installed in each guide groove 12, and the guide rod 13 is arranged along the extending direction of the guide groove 12. Correspondingly, two guide seats 35 are provided at the bottom of the movable plate 31. The two guide seats 35 are fitted onto the two guide rods 13 one-to-one, and the guide seats 35 can move along the axis of the guide rod 13 within the guide groove 12 as the slide 34 moves, thereby further limiting the movement trajectory of the movable plate 31. At the same time, the arrangement of the two guide rods 13 and the two guide seats 35 can also improve the installation stability of the movable plate 31 and the frame 1.

[0048] Furthermore, such as Figures 1-3 , Figure 5 As shown, the conveying mechanism 33 includes a conveyor frame 331, a third drive member 332, a conveyor belt 333, a drive roller 334, a driven roller 335, and multiple auxiliary rollers 336. The bottom of the conveyor frame 331 is fixedly connected to the top of the conveyor shaft. The drive roller 334, driven roller 335, and multiple auxiliary rollers 336 are all horizontally arranged along the left-right direction of the frame 1 and rotatably mounted inside the conveyor frame 331. The drive roller 334, driven roller 335, and multiple auxiliary rollers 336 are spaced apart along the front-rear direction of the frame 1. The conveyor belt 333 is fitted onto the drive roller 334, driven roller 335, and multiple auxiliary rollers 336. The third drive component 332 is fixedly installed on the outer wall of the conveyor frame 331, and the drive end of the third drive component 332 passes through the conveyor frame 331 and is fixedly connected to the drive roller 334. This allows the drive end of the third drive component 332 to drive the drive roller 334 to rotate, thereby synchronously driving the driven roller 335 and multiple auxiliary rollers 336 to rotate. This enables the conveyor belt 333 to transport materials towards the rear of the frame 1, ensuring that the materials are stably transported to the designated position. Moreover, by having one third drive component 332 drive one drive roller 334 to rotate, and the driven roller 335 and multiple auxiliary rollers 336 to rotate synchronously, the rotation speeds of the drive roller 334, driven roller 335, and multiple auxiliary rollers 336 are made consistent. This ensures that the conveyor belt 333 maintains a uniform conveying speed, avoiding the conveyor belt 333 from winding or tearing due to different rotation speeds of the rollers. This improves the stability of the conveyor belt 333 and extends its service life. Meanwhile, by setting multiple auxiliary rollers 336, the conveyor belt 333 can play a stable supporting role, avoiding sagging or deviation of the conveyor belt 333 due to excessive material weight, ensuring that the material will not scatter during the conveying process, and improving the unloading accuracy.

[0049] It should be noted that, as Figure 1 As shown, in this embodiment, the active roller 334 is located at the rear end, the driven roller 335 is located at the front end, and the third driving member 332 is also located at the rear end, so as to prevent the third driving member 332 from interfering with the mounting frame 7, prevent the third driving member 332 from colliding with the mounting frame 7, and avoid damage to the third driving member 332.

[0050] Furthermore, such as Figure 3 and Figure 5As shown, the conveying mechanism 33 also includes a support frame 338, which is V-shaped, horizontally positioned, and bolted to the bottom of the conveyor frame 331 to support it. Simultaneously, the V-shaped tip of the support frame 338 is fixedly connected to a rotating shaft 324, allowing the rotating shaft 324 to drive the support frame 338 to rotate, thus synchronously driving the conveyor frame 331 to rotate. Furthermore, guide blocks 339 are fixedly installed at the bottom of both sides of the V-shape of the support frame 338. Correspondingly, a guide arc groove 311 is formed on the top of the moving plate 31, with both guide blocks 339 placed within the guide arc groove 311. This limits the rotation trajectory of the support frame 338 through the guide blocks 339 and the guide arc groove 311, preventing the support frame 338 from deviating during the rotation of the rotating shaft 324 and further improving unloading accuracy. Preferably, the guide block 339 is inverted T-shaped to improve the installation stability of the support bracket 338 and the movable plate 31.

[0051] Furthermore, such as Figures 1-3 , Figure 5 and Figure 8 As shown, the conveying mechanism 33 also includes a guide plate 337. The guide plate 337 is fixedly installed at the rear end of the conveyor frame 331, and is inclined downwards and backwards. It is used to guide the material conveyed by the conveyor belt 333, preventing splashing and scattering of material due to gravity when it falls from the end of the conveyor belt 333, ensuring that the material falls accurately into the designated position, further improving unloading accuracy. At the same time, the inclined arrangement of the guide plate 337 also slows down the material's falling speed, preventing high-speed material from impacting the bottom of the tunnel or equipment, reducing material loss and equipment wear, and extending equipment service life.

[0052] It should be noted that the first drive unit 41, the second drive unit 321, and the third drive unit 332 in this embodiment are all forward and reverse geared motors, which are electrically connected through an external power supply. This is prior art and will not be described in detail here. Furthermore, the threaded rod 43 is rotatably connected to the slide groove 11 via bearings. The driving roller 334, the driven roller 335, and multiple auxiliary rollers 336 are also rotatably connected to the conveyor frame 331 via bearings.

[0053] Example 2

[0054] One unloading method in this embodiment includes the off-highway mining dump truck as described in Embodiment 1, and further includes the following steps:

[0055] S1: Drive the drive end of the first drive member 41 to rotate the first worm 422, which in turn drives the first worm wheel 421 and the threaded rod 43 to rotate simultaneously. The moving plate 31, through the screw connection between the slide block 34 and the threaded rod 43, moves along the extension direction of the slide groove 11 on the frame 1 towards the rear end, so as to synchronously drive the rotating mechanism 32 and the conveying mechanism 33 to move to the designated position in the front-rear direction. Simultaneously, or after the moving plate 31 drives the rotating mechanism 32 and the conveying mechanism 33 to move to the designated position, drive the drive end of the second drive member 321 to rotate the second worm 323, which in turn drives the second worm wheel 322 and the rotating shaft 324 to rotate simultaneously, so that the conveying mechanism 33 rotates around the axis of the rotating shaft 324 to the target angle. It should be noted that the target angle here can be 0°, that is, the target position is located directly behind the frame 1. At this time, the conveying mechanism 33 does not need to rotate, and the front-rear centerline of the conveying mechanism 33 is parallel to the front-rear centerline of the frame 1. Of course, the target angle can also be other angles, and the specific angle depends on the target delivery location on site.

[0056] S2: The driving end of the third driving component 332 drives the active roller 334 to rotate, thereby driving the driven roller 335 and multiple auxiliary rollers 336 to rotate, so as to drive the conveyor belt 333 to convey towards the rear end.

[0057] S3: Drive the extension end of the second telescopic cylinder 6 to extend, so as to rotate the body of the truck bed 21 around the axis of the hinge shaft toward the rear of the frame 1 to a specified angle, so that the unloading port faces the conveyor belt 333.

[0058] S4: Simultaneously drive the extension ends of the two first telescopic cylinders 222 to extend, causing the door panel 221 to rotate around its hinge axis with the truck body 21, thereby opening the discharge port. This allows the material inside the truck body 21 to be collected together through the inclined surfaces of the two guide blocks 23 and released from the discharge port onto the conveyor belt 333. Figure 8 As shown.

[0059] S5: Conveyor belt 333 continuously transports materials to the target location.

[0060] Example 3

[0061] After unloading is completed, the dump truck also includes the following steps:

[0062] S1: After unloading is completed, drive the telescopic ends of the two first telescopic cylinders 222 to retract, so that they drive the door panel 221 to rotate around the hinge axis with the truck body 21, close the unloading port, and at the same time drive the telescopic end of the second telescopic cylinder 6 to retract, so that the truck body 21 can rotate around the hinge axis toward the front end to be horizontal.

[0063] S2: Stop driving the third driving member 332, so that the conveyor belt 333 stops conveying. At the same time, drive the driving end of the second driving member 321 to drive the second worm 323 to rotate, so that the second worm wheel 322 and the rotating shaft 324 rotate simultaneously, so that the conveying mechanism 33 rotates around the axis of the rotating shaft 324 to a position parallel to the body of the truck bed 21.

[0064] S3: Drive the drive end of the first drive component 41 to drive the first worm gear 422 to rotate, thereby driving the first worm wheel 421 and the threaded rod 43 to rotate simultaneously. The moving plate 31, through the screw connection between the slide block 34 and the threaded rod 43, moves along the extension direction of the slide groove 11 on the frame 1 towards the front end, so as to synchronously drive the rotating mechanism 32 and the conveying mechanism 33 to move to the initial position in the front-rear direction. Figure 1 As shown.

[0065] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0066] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0068] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A non-highway mining dump truck, comprising a frame (1), characterized in that, It also includes a truck bed (2) and a transfer device (3), with the transfer device (3) located below the truck bed (2); The truck bed (2) includes a truck bed body (21) and a discharge gate assembly (22). The truck bed body (21) is hinged to the frame (1) in a flip-out manner, and the discharge gate assembly (22) is rotatably mounted on the rear end of the truck bed body (21) to open or close the discharge port. The transfer device (3) includes a conveying mechanism (33) that is horizontally movable and rotatable in the front-rear direction and connected to the frame (1). When the conveying mechanism (33) is in the front position, it is hidden under the truck bed (2); The truck bed body (21) is set horizontally, and when the unloading gate assembly (22) closes the unloading port, it is in the loading posture; The truck body (21) is inclined relative to the conveying mechanism (33). The conveying mechanism (33) moves to the rear position and rotates left and right to the target angle. When the unloading gate assembly (22) opens the unloading port toward the conveying mechanism (33), it is in the unloading posture. The conveying mechanism (33) can transport the unloading from the unloading port to the target position.

2. The off-highway mining dump truck as described in claim 1, characterized in that: The transfer device (3) also includes a movable plate (31) and a rotating mechanism (32). The movable plate (31) is installed on the frame (1) in a horizontally movable manner in the front-back direction. The rotating mechanism (32) is fixedly installed inside the movable plate (31). The rotating end of the rotating mechanism (32) passes through the movable plate (31) and is fixedly connected to the bottom of the conveying mechanism (33) to drive the conveying mechanism (33) to rotate horizontally. The off-highway mining dump truck also includes a transmission device (4), which includes a first drive component (41), a transmission mechanism (42), and a threaded rod (43). The first drive member (41) and the transmission mechanism (42) are both fixedly installed in the frame (1). The top of the frame (1) is provided with a slide groove (11) extending in the front-rear direction. The threaded rod (43) is rotatably installed in the slide groove (11) along the extension direction of the slide groove (11). The two ends of the transmission mechanism (42) are respectively connected to the drive end of the first drive member (41) and one end of the threaded rod (43). The bottom of the movable plate (31) is provided with a slide (34), which is placed in the slide groove (11) and screwed onto the threaded rod (43); The driving end of the first driving member (41) can drive the threaded rod (43) to rotate through the transmission mechanism (42), so as to drive the slide (34) and the moving plate (31) to move horizontally back and forth along the axis of the threaded rod (43) to change the conveying position of the conveying mechanism (33).

3. The off-highway mining dump truck as described in claim 2, characterized in that: The transmission mechanism (42) includes a first worm gear (421) and a first worm (422); The first worm (422) is horizontally arranged in the front-back direction, and one end of the first worm (422) is fixedly connected to the driving end of the first driving member (41), and the other end is rotatably connected to the frame (1). The first worm wheel (421) is vertically arranged in the frame (1) and fixedly connected to one end of the threaded rod (43). The first worm gear (421) meshes with the first worm (422) so that the driving end of the first driving member (41) can drive the first worm (422) to rotate, thereby causing the first worm gear (421) and the threaded rod (43) to rotate coaxially at the same time.

4. The off-highway mining dump truck as described in claim 2, characterized in that: The rotating mechanism (32) includes a second driving member (321), a second worm wheel (322), a second worm (323), and a rotating shaft (324). The second drive member (321), the second worm (323), and the second worm wheel (322) are all horizontally arranged. The drive end of the second drive member (321) is fixedly connected to one end of the second worm (323). The second worm wheel (322) meshes with the second worm (323). The rotating shaft (324) is vertically arranged and coaxial with the second worm wheel (322). One end of the rotating shaft (324) is fixedly connected to the second worm wheel (322), and the other end passes through the moving plate (31) and is fixedly connected to the bottom of the conveying mechanism (33). The driving end of the second driving member (321) can drive the second worm (323) to rotate, so as to simultaneously drive the second worm wheel (322), the rotating shaft (324) and the conveying mechanism (33) to rotate around the axis of the rotating shaft (324) to change the conveying orientation of the conveying mechanism (33).

5. The off-highway mining dump truck as described in claim 4, characterized in that: The conveying mechanism (33) includes a conveyor frame (331), a third drive element (332), a conveyor belt (333), a drive roller (334), a driven roller (335), and multiple auxiliary rollers (336). The bottom of the conveyor frame (331) is fixedly connected to the top of the conveyor shaft. The active roller (334), the driven roller (335) and a plurality of auxiliary rollers (336) are all horizontally arranged along the left and right directions of the frame (1) and rotatably installed in the conveyor frame (331). The active roller (334), the driven roller (335) and the plurality of auxiliary rollers (336) are spaced apart along the front and rear directions of the frame (1). The conveyor belt (333) is fitted onto the drive roller (334), the driven roller (335) and a plurality of auxiliary rollers (336); The third drive unit (332) is fixedly installed on the outer wall of the conveyor frame (331), and the drive end of the third drive unit (332) passes through the conveyor frame (331) and is fixedly connected to the drive roller (334) so ​​that the drive end of the third drive unit (332) can drive the drive roller (334) to rotate, so as to synchronously drive the driven roller (335) and multiple auxiliary rollers (336) to rotate, and enable the conveyor belt (333) to convey materials toward the rear of the frame (1).

6. The off-highway mining dump truck as described in claim 5, characterized in that: The conveying mechanism (33) also includes a guide vane (337); The guide plate (337) is fixedly installed at the rear end of the conveyor frame (331), and the guide plate (337) is inclined to the rear and downward to guide the material conveyed by the conveyor belt (333).

7. The off-highway mining dump truck as described in claim 1, characterized in that: The unloading gate assembly (22) includes a gate panel (221) and two first telescopic cylinders (222); The fixed end of the first telescopic cylinder (222) is hinged to the frame (1), and the telescopic end of the first telescopic cylinder (222) is hinged to the bottom of the truck body (21). The rear end of the truck body (21) is the unloading port. The door panel (221) is hinged to the top of the unloading port of the truck body (21), the fixed ends of the two first telescopic cylinders (222) are respectively hinged to the left and right side walls of the truck body (21), and the telescopic ends of the two first telescopic cylinders (222) are respectively hinged to the left and right side walls of the bottom of the door panel (221). The two first telescopic cylinders (222) can extend and retract simultaneously to drive the door panel (221) to rotate about its hinge axis with the truck body (21) to open or close the unloading port.

8. The off-highway mining dump truck as described in claim 7, characterized in that: An arc-shaped protrusion (5) is provided on the bottom outer wall of the rear end of the truck body (21). The arc-shaped protrusion (5) extends along the left and right direction of the truck body (21) and protrudes towards the door panel (221). The front end of the door panel (221) is provided with an arc-shaped groove (2211) corresponding to the arc-shaped protrusion (5). The arc-shaped groove (2211) can fit tightly with the arc-shaped protrusion (5) so that the door panel (221) can seal the body of the truck bed (21).

9. The off-highway mining dump truck as described in claim 7, characterized in that: The truck bed (2) also includes two guide blocks (23); Both guide blocks (23) are fixedly installed inside the body of the truck bed (21) and are fixedly connected to the inner walls of the left and right sides of the body of the truck bed (21) respectively. Both guide blocks (23) are located at the rear end of the body of the truck bed (21) and are symmetrically arranged with respect to the center line of the front and rear direction of the body of the truck bed (21). The opposite sidewalls of the two guide blocks (23) are both inclined surfaces, and the inclined surfaces are inclined from front to back toward the centerline of the front and rear direction of the truck body (21) to reduce the size of the unloading port.

10. A method for unloading materials, comprising the off-highway mining dump truck as described in any one of claims 1-9, characterized in that, It also includes the following steps: S1: The conveying mechanism (33) moves to the rear position and rotates left and right to the target angle; S2: Drive the bucket body (21) to flip to the rear of the frame (1) to a specified angle, and then drive the unloading gate assembly (22) to open the unloading port, so that the material in the bucket body (21) is poured into the conveying mechanism (33). S3: The conveying mechanism (33) transports the material to the target location.

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