A remotely controllable hydraulic self-dumping mine car

Abstract

This invention discloses a remotely controllable hydraulic self-unloading mining car, relating to the field of self-unloading mining car technology. The self-unloading car includes a conveyor mounted on the lower surface of the rear of its frame. A track is installed on the conveyor, and several first drive motors are mounted on the outer surface of the conveyor's rotating working surface. Each first drive motor has a second drive motor mounted at its front end. A retractable and foldable folding and pushing mechanism is mounted on the front surface of each second drive motor. By setting a conveyor, folding and pushing mechanism, and a winding mechanism below the rear of the self-unloading car frame, this invention can actively push the material at the rear of the car backward during unloading, clearing material accumulation below the discharge port in real time. This fundamentally prevents material from blocking the rear of the car and causing unloading interruptions, enabling continuous unloading without the vehicle moving forward, significantly improving unloading efficiency.

Description

Technical Field

[0001] This invention relates to the field of self-unloading mining truck technology, specifically to a remotely controllable hydraulic self-unloading mining truck. Background Technology

[0002] In the fields of mining, tunnel construction, earthmoving, and underground ore transportation, dump trucks are core equipment for loading, unloading, and transferring materials. Currently, conventional dump trucks both domestically and internationally generally employ a rear-tilting hydraulic lifting system, relying on the gravity of the material for unloading. This involves a hydraulic cylinder pushing the truck bed upwards around the rear hinge point, allowing the material inside to be discharged from the rear opening under its own weight. This structure has long held a dominant position in engineering transportation due to its simple principle, low manufacturing cost, and convenient maintenance. However, as mining develops towards deeper, more intelligent, and more intensive operations, the operating space is shrinking, and unloading conditions are becoming increasingly complex. Traditional dump trucks have revealed a series of inherent technical defects in practical applications, including low unloading efficiency, cumbersome operating procedures, poor site adaptability, susceptibility to vehicle damage, high safety risks, and insufficient intelligence. These specific problems are discussed in detail below. Traditional dump trucks rely entirely on the gravity of materials for unloading. When transporting materials with poor flowability, such as wet, sticky clay, kaolin, slurry-like tailings, agglomerated ore, or construction waste, the material cannot flow smoothly out of the rear outlet of the truck and quickly accumulates below the truck and directly behind the rear. As unloading continues, the accumulated material rises and directly presses against the rear of the truck and the tailgate, creating a self-locking blockage that prevents the material from sliding down under its own weight, causing a complete interruption of unloading. At this point, the operator must move the truck forward a distance to remove the rear from the material accumulation area and release the material from the rear of the truck before unloading can resume. Unloading a single truckload of material often requires multiple repositioning and lifting operations, which are cumbersome and time-consuming, significantly reducing overall transfer and unloading efficiency. Especially in underground tunnels, narrow silos, or confined pits with limited space, the vehicle may not even be able to move forward, directly preventing unloading from being completed.

[0003] Traditional direct unloading methods concentrate material directly behind the truck, quickly forming a cone-shaped, high-drop, dense pile. This results in a small base and large height, occupying significant rear workspace and obstructing unloading positions for subsequent dump trucks, leading to congestion and long waiting times. Furthermore, the towering piles pose a risk of collapse and rollover, endangering surrounding equipment, personnel, and tunnel walls. In addition, concentrated piles hinder subsequent equipment such as loaders and excavators from retrieving, transferring, and leveling materials, often requiring additional bulldozers or manual labor for spreading and shaping, increasing construction steps, equipment investment, and labor costs, and reducing the continuity and economy of overall mine operations.

[0004] During unloading and vehicle repositioning, large amounts of ore, gravel, and soil inevitably scatter around the rear of the chassis, rear axle housing, and tires. As the vehicle moves forward, this scattered material is squeezed and trapped inside the chassis structure. Over time, this accumulation can cause problems such as suspension jamming, brake line wear, driveshaft blockage, and stones stuck in the tires. On the one hand, it exacerbates wear on chassis components, increasing the probability of failure and maintenance costs; on the other hand, material jamming affects steering, braking, and driving stability, and under heavy load conditions, it can easily lead to abnormal tire wear, brake failure, chassis deformation, and other safety hazards, seriously threatening the reliability of vehicle operation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a remotely controllable hydraulic self-unloading mining truck, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a remotely controllable hydraulic self-unloading mine car, comprising a self-unloading vehicle, wherein a conveyor is mounted on the lower surface of the rear of the self-unloading vehicle frame, a track is mounted on the conveyor, a plurality of first drive motors are mounted on the outer surface of the conveyor's rotating working surface, a second drive motor is mounted at the front end of each of the first drive motors, a retractable and foldable folding push mechanism is mounted on the front surface of the second drive motor, a winding mechanism is fixedly mounted on the retractable end of the folding push mechanism, and a third drive motor for driving the winding mechanism is mounted on the top of the folding push mechanism.

[0007] Preferably, the conveyor includes two support plates, which are fixedly connected by several pillars. The uppermost support plate is fixedly mounted under the frame of the dump truck. The left and right ends of the middle of the two support plates are rotatably connected to conveying rollers through bearings. A motor is fixedly installed on the top of the support plate. The output end of the motor is connected to the top of a conveying roller through a coupling. A conveyor belt for transmission connection is sleeved on the outer side of the two conveying rollers.

[0008] Preferably, the first drive motor includes a first drive rail, and the side of the first drive rail is mounted on the outer surface of the conveyor belt. A first piston cylinder is fixedly installed inside the first drive rail. A first piston column is slidably installed inside the first piston cylinder. The top end of the first piston column extends above the first piston cylinder and is fixedly installed with a first magnet block. A first spring is sleeved on the outer side of the first piston column. The top end of the first spring is connected to the bottom end of the first magnet block. The bottom end of the first spring is connected to the top end of the first piston cylinder. A first flexible tube is fixedly installed at the liquid outlet at the bottom end of the first piston cylinder.

[0009] Preferably, the second drive motor includes a second drive rail, which is mounted in front of the first drive rail. A second piston cylinder is fixedly installed inside the second drive rail. A second piston post is slidably installed inside each of the second piston cylinders. The top of each of the second piston posts extends above the second piston cylinder and is fixedly installed with a second magnet block. A second spring is sleeved on the outside of each of the second piston posts. The top of each of the second springs is connected to the bottom of the second magnet block, and the bottom of each of the second springs is connected to the top of the second piston cylinder. A fixing pipe is fixedly installed at the outlet of the second piston cylinder.

[0010] Preferably, the track includes a track body, which is fixedly mounted on the outer side of the uppermost support plate. The track body has two sets of annular cavities inside. A first half-electromagnet is fixedly installed at the front of each annular cavity, and a second half-electromagnet is fixedly installed at the rear of each annular cavity. A first guide block is fixedly installed at the top of the first drive rail, and a second guide block is fixedly installed at the top of the second drive rail. The tops of the first guide block and the second guide block extend into the two annular cavities, respectively. The first magnet block and the second magnet block are magnetically engaged with the first half-electromagnet and the second half-electromagnet inside the two annular cavities, respectively.

[0011] Preferably, the folding push mechanism includes a fixed plate, which is fixedly mounted in front of the second drive rail. A first extension plate is slidably mounted inside the fixed plate, with its front end extending to the front of the fixed plate. A second extension plate is slidably mounted inside the first extension plate, with its front end extending to the front of the first extension plate. A telescopic plate is slidably mounted inside the second extension plate, with its front end extending to the front of the second extension plate. A folding liquid bladder is fixedly mounted at the rear end of the telescopic plate. The rear end of the folding liquid bladder passes through the second and first extension plates and is fixedly connected to one side of the inner cavity of the fixed plate. One end of a fixed tube extends into the folding liquid bladder. A rotating shaft is rotatably connected inside the fixed plate via a bearing. A winding roller is fixedly sleeved on the outer side of the rotating shaft, above and below the folding liquid bladder. A traction rope is wound around the outer side of each winding roller, with one end of each traction rope fixedly connected to the rear end of the telescopic plate. A first spring is fixedly mounted at the top of the inner cavity of the fixed plate, with one end of each first spring fixedly connected to the outer side of the rotating shaft.

[0012] Preferably, the winding mechanism includes a mounting base, which is installed at the front end of the telescopic plate. A passive motor is fixedly installed at the front end of the mounting base, and a drive motor is fixedly installed at the front end of the mounting base and on the side of the passive motor. A passive roller is rotatably connected inside the passive motor via a bearing, and a drive roller is rotatably connected inside the drive motor via a bearing. A pusher pad is wound around the outer side of each passive roller, and the other end of each pusher pad extends into the interior of another set of drive motors and is fixedly connected to the outer side of the drive roller. A groove is formed on the surface of the pusher pad.

[0013] Preferably, a telescopic rod is fixedly installed on one side of the inner cavity of the mounting base, a first liquid sleeve is fixedly installed on one side of the inner cavity of the telescopic rod, an extension rod is fixedly installed at one end of the first liquid sleeve, one end of the extension rod extends into the interior of the mounting base and is fixedly installed with a first rack, a guide seat is fixedly installed at the bottom of the inner cavity of the mounting base, the bottom end of the first rack extends into the interior of the guide seat, a fourth spring is fixedly installed on one side of the inner cavity of the guide seat, one end of the fourth spring is fixedly connected to the lower side of the first rack, a worm gear is rotatably connected to the surface of the inner cavity of the drive machine through a bearing, a worm wheel is fixedly sleeved on the outer side of the bottom end of the drive roller, the worm wheel cooperates with the worm gear, one end of the worm gear extends into the interior of the mounting base and is fixedly sleeved with a transmission gear that cooperates with the first rack, and one end of the first flexible tube extends into the interior of the first liquid sleeve.

[0014] Preferably, the third drive unit includes a drive base, which is mounted on the top of the fixed plate. A third piston cylinder is fixedly sleeved inside the drive base. A third piston column is slidably installed inside the third piston cylinder. The rear end of the third piston column extends to the rear of the third piston cylinder and is fixedly installed with a third magnet block. A second flexible tube is fixedly installed at the discharge end of the third piston cylinder. A third spring is sleeved on the outer side of the third piston column. One end of the third spring is connected to one end of the third magnet block, and the other end of the third spring is connected to the rear end of the third piston cylinder. A third electromagnet is embedded behind the rear end of the rail body and in the outermost annular cavity. The third electromagnet only magnetically engages with the third magnet block.

[0015] Preferably, the driven motor is internally connected to a bidirectional clamping sliding screw via a bearing. Clamping friction blocks are threaded onto the outer sides of the bidirectional clamping sliding screw with opposite thread positions. The inner sides of the clamping friction blocks mate with the outer surface of the driven roller. One end of the bidirectional clamping sliding screw extends into the mounting base and is fixedly fitted with a second gear. A guide channel is fixedly installed on one side of the mounting base's inner cavity. A second hydraulic sleeve is fixedly installed on one side of the guide channel's inner cavity. A telescopic column is fixedly installed at one end of the second hydraulic sleeve, and a fifth spring is fitted onto the outer side of one end of the telescopic column. One end of the fifth spring is connected to one end of the telescopic column, and the other end of the fifth spring is connected to one side of the inner cavity of the guide. The left end of the telescopic column extends to the outside of the guide and is fixedly installed with a second rack that cooperates with the second gear. One end of the second flexible tube extends into the inside of the second hydraulic sleeve. A second spring is installed inside the driven motor, and one end of the second spring is connected to the outside of the driven roller. The dump truck includes a cargo box, and a cargo box is installed on the dump truck. A rear tail plate is hinged to the rear of the cargo box. A drive assembly that can be remotely started and hydraulically drives the cargo box to rotate is installed on the dump truck.

[0016] This invention provides a remotely controllable hydraulic self-unloading mining truck, which has the following advantages: 1. This invention, by setting a conveyor, a folding and pushing mechanism and a winding mechanism under the rear of the dump truck frame, can actively push the material at the rear of the truck body backward during unloading, and clear the material accumulation under the discharge port in real time. This fundamentally avoids the material blocking the rear of the truck and causing unloading interruption, and realizes continuous material discharge without the vehicle moving forward throughout the unloading process, significantly improving unloading efficiency.

[0017] 2. This invention adopts a segmented working mode of backward pushing and left and right sweeping. In the initial stage of unloading, a flexible pushing pad is unfolded to form a continuous pushing surface to ensure that the material is smoothly discharged backward. In the middle and later stages of unloading, the pushing pad is rolled up to expose the empty trough. The conveyor drives the pushing mechanism to move back and forth, spreading the material to both sides, optimizing the shape of the material pile, reducing the space occupied at the rear, and is especially suitable for narrow working sites such as mines and silos, improving the versatility of the site.

[0018] 3. By using a push pad in conjunction with an empty trough, this invention can prevent materials from being carried back to the chassis, rear axle, and under the tires during the retraction and rotation of the mechanism, thus eliminating the risk of material accumulation, jamming, wear, and getting stuck in the chassis, protecting the vehicle's running gear, and extending the service life of the entire vehicle.

[0019] 4. This invention adopts a combination structure of electromagnet magnetic control drive, hydraulic piston transmission, and automatic reset of spring and clockwork. The action is automatically triggered according to the running position, with precise timing and no need for complex electrical control programs. It remains stable and reliable with a low failure rate even under harsh working conditions such as high dust, high humidity and strong vibration in mines.

[0020] 5. The folding and pushing mechanism of the present invention adopts a multi-stage telescopic folding design. In the non-working state, it can be completely retracted to the bottom of the vehicle frame without exceeding the vehicle's outer dimensions, and without affecting the vehicle's normal driving, steering, and road traffic compliance. The operation and traffic functions do not interfere with each other.

[0021] 6. This invention, in conjunction with a remote-controlled hydraulic lifting system for dump trucks, enables remote control of the entire unloading process. Personnel can complete the operation without approaching the unloading area, significantly improving operational safety in hazardous conditions such as mines, slopes, and underground workings.

[0022] 7. The present invention adopts a pushing structure that combines a rigid pushing plate and a flexible pushing pad, which pushes material continuously without gaps or leakage. It has good adaptability to a variety of materials such as mineral sand, wet soil, clay, slag, and boulders, and has a wide range of applications.

[0023] 8. This invention achieves self-locking and precise reset through structures such as clamping friction blocks, spring reset, and rack and pinion limiting. The mechanism operates without interference or jamming, and can quickly return to its original position after unloading. It has a short preparation time and is suitable for continuous multi-vehicle unloading operations.

[0024] 9. This invention, through backward pushing and left and right spreading, forms a uniform and flat material strip during unloading, which facilitates subsequent material handling by loaders and forklifts and site leveling, reduces secondary transfer and manual handling workload, and lowers overall operating costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the conveyor structure of the present invention; Figure 3 This is a schematic diagram of the structure of the anti-stacking machine of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the track body of the present invention; Figure 5 This is a cross-sectional internal structural diagram of the first drive motor, the second drive rail, the folding push mechanism, and the third drive motor of the present invention. Figure 6 This is a schematic diagram of the electromagnet layout structure of the present invention; Figure 7 This is a cross-sectional view of the third drive mechanism of the present invention; Figure 8 This is a schematic diagram of the pusher pad structure of the present invention; Figure 9 This is a schematic diagram of the passive roller and the active roller of the present invention; Figure 10 This is a schematic diagram of the internal structure below the mounting base, the driven motor, and the active motor of the present invention; Figure 11This is a schematic diagram of the internal structure above the mounting base, the driven motor, and the driving motor of the present invention; Figure 12 This is a schematic diagram of the internal structure of the guide seat of the present invention; Figure 13 This is a schematic diagram of the internal cross-sectional structure of the guide channel of the present invention.

[0026] In the diagram: 1. Dump truck; 101. Truck body; 102. Rear tailgate; 2. Conveyor; 201. Support plate; 202. Motor; 203. Conveyor roller; 204. Support column; 205. Conveyor belt; 3. Track; 301. Track body; 302. Annular cavity; 303. First half-electromagnet; 304. Second half-electromagnet; 305. Third electromagnet; 4. First drive motor; 401. First drive rail; 402. First magnet block; 403. First spring; 40 4. First piston cylinder; 405. First piston rod; 406. First flexible tube; 407. First guide block; 5. Second drive motor; 501. Second drive rail; 502. Second magnet block; 503. Second piston cylinder; 504. Second piston rod; 505. Second spring; 506. Second guide block; 507. Fixed tube; 6. Folding push mechanism; 601. Fixed plate; 602. First extension plate; 603. Second extension plate; 604. Rotating shaft; 605. Retractable... 606. Winding roller; 607. Traction rope; 608. First mainspring; 609. Folding liquid bladder; 6000. Telescopic plate; 7000. Third drive motor; 701. Drive base; 702. Third magnet; 703. Third spring; 704. Third piston cylinder; 705. Third piston rod; 706. Second flexible tube; 807. Winding mechanism; 801. Mounting base; 802. Passive motor; 803. Driven motor; 804. Passive roller; 805. Driven roller; 806. Worm gear; 807. Worm gear; 808, transmission gear; 809, telescopic rod; 810, first hydraulic sleeve; 811, extension rod; 812, first rack; 813, guide seat; 814, fourth spring; 815, bidirectional clamping sliding screw; 816, clamping friction block; 817, guide channel; 818, telescopic column; 819, fifth spring; 820, second rack; 821, second hydraulic sleeve; 822, second gear; 823, pusher pad; 824, empty slot; 825, second spring. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Standard Implementation Examples Combination Figures 1 to 13This embodiment discloses a remotely controllable hydraulic self-unloading mine car, including a self-unloading car 1, a conveyor 2, a track 3, a first drive motor 4, a second drive motor 5, a folding and pushing mechanism 6, a third drive motor 7, and a winding mechanism 8.

[0029] The dump truck 1 includes a cargo box 101, a rear tailgate 102, and a remote-controlled hydraulic drive assembly. The cargo box 101 can be lifted and unloaded under the control of remote control commands.

[0030] The conveyor 2 is fixedly installed on the lower surface of the rear of the dump truck 1 frame to provide overall rotation power.

[0031] Track 3 is fixedly installed on the outside of conveyor 2 for position detection and magnetic triggering.

[0032] The first drive motor 4 is installed on the rotating working surface of the conveyor 2 and is used to control the winding of the push pad 823 and the positioning of the empty trough 824.

[0033] The second drive unit 5 is installed at the front end of the first drive unit 4 and is used to drive the extension and retraction of the folding push mechanism.

[0034] The folding push mechanism 6 is installed at the front end of the second drive motor 5. It is a retractable folding structure used to push the material out and retract it.

[0035] The winding mechanism 8 is installed at the telescopic end of the folding push mechanism 6 and is used for unfolding the push pad 823, winding it up, and changing the empty slot 824.

[0036] The third drive unit 7 is installed on top of the folding push mechanism 6 and is used to drive the winding mechanism to achieve clamping self-locking and unlocking.

[0037] Preferred embodiment 1 The conveyor 2 includes two support plates 201, which are fixedly connected by several pillars 204. The upper support plate 201 is fixedly mounted under the frame of the dump truck 1. The left and right ends of the middle of the support plate 201 are rotatably connected to the conveyor rollers 203 through bearings. The top of the support plate 201 is fixedly mounted with a motor 202, and the output end of the motor 202 is connected to the top of the conveyor rollers 203 through a coupling. The two conveyor rollers 203 are fitted with conveyor belts 205.

[0038] Structural principle: Motor 202 drives conveyor roller 203 to rotate, which in turn drives conveyor belt 205 to rotate, providing power for left and right sweeping.

[0039] Technical advantages: Stable structure, strong load-bearing capacity, can operate continuously under heavy load and dust conditions, and has precise rotation positioning.

[0040] Preferred embodiment 2 The first drive unit 4 includes a first drive rail 401, which is fixed to the outer surface of the conveyor belt 205; a first piston cylinder 404 is fixed inside the first drive rail 401, and a first piston column 405 is slidably installed inside the first drive rail 401; a first magnet block 402 is fixed to the top of the first piston column 405, and a first spring 403 is sleeved on the outside; a first flexible tube 406 is connected to the liquid outlet at the bottom of the first piston cylinder 404; and a first guide block 407 is fixed to the top of the first drive rail 401.

[0041] Structural principle: The first magnet block 402 is driven by the magnetic repulsion of the track electromagnet, which pushes the first piston column 405 to move downward, compressing the hydraulic oil and outputting power through the first flexible tube 406; the first spring 403 provides the restoring force.

[0042] Technical advantages: Magnetic control non-contact drive, no exposed circuitry, high reliability in harsh mining environments, and fast response.

[0043] Preferred Example 3 Structural features: The second drive motor 5 includes a second drive rail 501, which is fixed to the front end of the first drive rail 401; a second piston cylinder 503 is fixed inside the second drive rail 501, and a second piston column 504 is slidably installed inside the second drive rail 501; a second magnet block 502 is fixed to the top of the second piston column 504, and a second spring 505 is sleeved on the outside; a fixed pipe 507 is connected to the liquid outlet of the second piston cylinder 503; and a second guide block 506 is fixed to the top of the second drive rail 501.

[0044] Structural principle: The second magnet block 502 is driven by magnetic repulsion, which pushes the second piston column 504 to move down, and the hydraulic oil enters the folding push mechanism through the fixed pipe 507.

[0045] Technical effect: It is driven independently of the first drive motor, without interference, and the timing of the extension and retraction movements is precise.

[0046] Preferred embodiment 4 The track 3 includes a track body 301, which is fixed to the outside of the upper support plate 201; two sets of annular cavities 302 are opened inside the track body 301; a first half electromagnet 303 is fixed in the front annular cavity 302, and a second half electromagnet 304 is fixed in the rear annular cavity 302; a third electromagnet 305 is embedded in the rear end of the track body 301; a first guide block 407 and a second guide block 506 extend into the two sets of annular cavities 302 and slide in cooperation.

[0047] Structural principle: When the electromagnet is energized according to its position, it generates a magnetic repulsion force with the corresponding magnetic block, triggering the drive motor to move.

[0048] Technical benefits: Automatic position triggering, no need for sensors and complex wiring, simple control logic, and extremely low failure rate.

[0049] Preferred Example 5 The folding push mechanism 6 includes a fixed plate 601, which is fixed to the front end of the second drive rail 501; a first extension plate 602, a second extension plate 603, and a telescopic plate 609 are slidably installed in sequence inside the fixed plate 601; a folding liquid bladder 608 is fixed to the rear end of the telescopic plate 609, and the rear end of the folding liquid bladder 608 is fixed to the inner wall of the fixed plate 601; one end of the fixed tube 507 extends into the interior of the folding liquid bladder 608; a rotating shaft 604 is rotatably installed inside the fixed plate 601 via a bearing, and a winding roller 605 is fixedly sleeved on the outer side; the winding roller 605 winds a traction rope 606, and one end is fixed to the telescopic plate 609; a first spring 607 is fixed to the top of the inner cavity of the fixed plate 601 and connected to the rotating shaft 604.

[0050] Structural principle: The folded liquid bladder 608 expands with oil, pushing the multi-stage plates to extend; the first spring 607 drives the winding roller 605 to wind up the traction rope 606, realizing the automatic retraction of the mechanism.

[0051] Technical features: multi-stage telescopic design, large extension stroke, small retraction volume, and does not exceed the vehicle's external dimensions when not in use.

[0052] Preferred Example 6 Structural features: The winding mechanism 8 includes a mounting base 801, which is fixed to the front end of the telescopic plate 609; the front end of the mounting base 801 is fixed to the passive motor 802 and the active motor 803; the passive motor 804 is rotatably installed inside the passive motor 802, and the active motor 805 is rotatably installed inside the active motor 803; the passive motor 804 is wrapped with a pusher pad 823, and the other end is fixed to the active motor 805; the surface of the pusher pad 823 has a groove 824.

[0053] Structural principle: The rotation of the active roller 805 causes the pusher pad 823 to be wound up, and the empty groove 824 moves between the two push plates to avoid material being carried back during retraction.

[0054] Technical benefits: The combination of rigidity and flexibility ensures continuous and seamless material feeding, while the 824 trough structure effectively prevents materials from being carried into the bottom of the vehicle.

[0055] Preferred embodiment 7 The mounting base 801 has a fixed telescopic rod 809 inside, and a first liquid sleeve 810 inside. One end of the first liquid sleeve 810 is connected to an extension rod 811, and the other end is fixed to a first rack 812. The bottom end of the first rack 812 extends into a guide seat 813, and a fourth spring 814 is installed inside. A worm gear 806 is rotatably installed inside the drive mechanism 803, and a worm wheel 807 is fixed to the bottom end of the drive roller 805 and meshes with the worm gear 806. One end of the worm gear 806 is fixed to a transmission gear 808, which meshes with the first rack 812. One end of the first flexible tube 406 extends into the first liquid sleeve 810.

[0056] Structural principle: Hydraulic oil enters the first hydraulic sleeve 810 to drive the rack to move, and through the gear and worm gear pair, it drives the drive roller 805 to rotate and rewind.

[0057] Technical benefits: The worm gear self-locking mechanism ensures precise winding and positioning, preventing slippage and loosening, and ensuring stable operation.

[0058] Preferred embodiment 8 The third drive unit 7 includes a drive base 701, which is fixed to the top of the fixed plate 601; a third piston cylinder 704 is fixed inside the drive base 701, and a third piston column 705 is slidably installed inside; a third magnet block 702 is fixed to the rear end of the third piston column 705, and a third spring 703 is sleeved on the outside; the discharge end of the third piston cylinder 704 is connected to a second flexible tube 706; the third magnet block 702 is only magnetically engaged with the third electromagnet 305.

[0059] Structural principle: When the third electromagnet 305 is energized, it generates magnetic repulsion, which pushes the third piston 705 to move, and the hydraulic oil is output through the second flexible tube 706.

[0060] Technical effect: Independent magnetic control triggering achieves self-locking of the passive roller 804, preventing loosening and movement during material pushing.

[0061] Preferred Example 9 A bidirectional clamping sliding screw 815 is rotatably installed inside the driven motor 802, with clamping friction blocks 816 connected to the reverse threads at both ends, and the inner side is clamped and engaged with the driven roller 804; a second gear 822 is fixed at one end of the bidirectional clamping sliding screw 815; a guide channel 817 is fixed in the inner cavity of the mounting base 801, and a second liquid sleeve 821 is fixed inside; the second liquid sleeve 821 is connected to a telescopic column 818, and a fifth spring 819 is sleeved on the outer side; a second rack 820 is fixed at the left end of the telescopic column 818, and meshes with the second gear 822; one end of the second flexible tube 706 extends into the second liquid sleeve 821; a second spring 825 is installed inside the driven motor 802 and is connected to the driven roller 804.

[0062] Structural principle: Hydraulic oil drives the second rack 820 to move, which in turn drives the lead screw to rotate, causing the clamping friction block 816 to clamp or release the passive roller 804.

[0063] Technical benefits: The passive roller 804 is locked during material feeding to ensure the tension of the feeding pad 823; it is released during retraction to achieve automatic winding, and the operation is reliable.

[0064] Composite Integration Optimal Implementation This embodiment integrates all the above-mentioned preferred features to form the optimal deployment structure: A conveyor 2 is fixed below the rear of the dump truck frame 1, and a track 3 is installed on the outside. Several first drive motors 4 and second drive motors 5 are installed on the conveyor belt 205, and a folding push mechanism 6 is connected to the front end. The folding push mechanism 6 is driven by a multi-stage telescopic and folding liquid bladder 608, and a third drive motor 7 is set on the top. A winding mechanism 8 is installed at the telescopic end, which uses an active roller 805 and a passive roller 804 in conjunction with a push pad 823 with a groove 824, and achieves self-locking through a bidirectional clamping sliding screw 815 and a clamping friction block 816.

[0065] The entire mechanism is linked by electromagnet magnetic control, hydraulic transmission, and spring / spring reset. During unloading, it first pushes the material backward to prevent blockage, then sweeps the material left and right to flatten it, and then rotates back to the bottom of the vehicle to automatically retract. The whole process is remotely controlled.

[0066] Workflow Implementation Examples: Phased Actions Backward pushing stage The carriage 101 is remotely lifted, and the rear tailgate 102 is opened for unloading; the third electromagnet 305 is energized, driving the clamping friction block 816 to clamp the passive roller 804; the second half electromagnet 304 is energized, the folding push mechanism 6 extends backward, and the push pad 823 unfolds to form a continuous push surface, pushing the material backward to avoid material blockage.

[0067] Left and right sweeping stages The pusher pad 823 rewinds to bring the empty trough 824 into place; the conveyor 2 starts, driving the pusher mechanism to move back and forth, spreading the material to both sides; when the mechanism rotates to the underside area, it automatically retracts without carrying back material.

[0068] Reset phase Once unloading is complete, all mechanisms automatically retract to the underside of the frame under the action of springs and clockwork, restoring the vehicle to its driving state.

[0069] In this embodiment, the first drive motor 4, the second drive motor 5, and the third drive motor 7 can be replaced by pneumatic cylinders instead of hydraulic cylinders, and the hydraulic pipelines can be replaced by pneumatic pipelines, with the control logic and working process remaining consistent; the push pad 823 can be replaced by wear-resistant rubber cloth, canvas, or polyurethane flexible board; the empty groove 824 can be set as an equally spaced through groove or a hollow structure to adapt to the pushing of materials of different particle sizes.

[0070] All the structures disclosed in this embodiment can be installed and used at the rear of various types of rear-discharge dump trucks, mining dump trucks, and slag trucks, and have versatility and modifiability.

[0071] In summary, the operation of this remotely controlled hydraulic self-unloading mining truck is as follows: Ore or sand is loaded into the truck bed 101. After the driver drives the dump truck 1 to the unloading position, he gets out of the truck and communicates with the lifting control system in the cab of the dump truck 1 via remote control. This controls the lifting hydraulic rod on the frame of the dump truck 1 to start, pushing the upper part of the truck bed 101 upwards. The truck bed 101 then rotates around the hinge point between its rear end and the frame of the dump truck 1. As the truck bed 101 is lifted, the rear tailgate 102 opens under gravity, and the ore, sand, and other materials inside the truck bed 101 fall out from the rear of the truck bed 101.

[0072] Pushback operation As the material falls, the third electromagnet 305 is energized, generating magnetic repulsion between it and the third magnet 702. This repulsion pushes the third magnet 702 to move the third piston rod 705 into the third piston cylinder 704, causing the hydraulic oil in the third piston cylinder 704 to enter the second hydraulic sleeve 821 through the second flexible tube 706. This pushes the second rack 820 to extend. The second rack 820 drives the second gear 822 and the bidirectional clamping sliding screw 815 to rotate, causing the two clamping friction blocks 816 to grip the passive roller 804, thus stopping the passive roller 804 from rotating.

[0073] When the second half electromagnet 304 located on the outermost side is energized, it pushes the second magnet block 502 and the second piston column 504 downward under the action of magnetic repulsion, so that the hydraulic oil in the second piston cylinder 503 enters the folded liquid bladder 608 through the fixed pipe 507. The folded liquid bladder 608 expands and pushes the telescopic plate 609 to move outward along the second extension plate 603. The telescopic plate 609 drives the second extension plate 603 and the first extension plate 602 to extend out in sequence, so that the winding mechanism 8 extends backward. The material accumulated at the rear of the vehicle is pushed backward through the pushing pad 823 to achieve continuous unloading.

[0074] Before the folding push mechanism 6 retracts, the third electromagnet 305 is de-energized, the magnetic repulsion disappears, the third piston column 705 drives the third magnet block 702 to reset, the hydraulic oil in the second liquid sleeve 821 flows back to the third piston cylinder 704 through the second flexible pipe 706, the second rack 820 resets, the clamping friction block 816 is released, and the limit on the passive roller 804 is released.

[0075] When the innermost second half electromagnet 304 is energized, it pushes the first magnet block 402 and the first piston column 405 downward under the action of magnetic repulsion. The hydraulic oil in the first piston cylinder 404 enters the first liquid sleeve 810 through the first flexible tube 406, which pushes the first rack 812 to move. Through the transmission gear 808, worm 806 and worm wheel 807, the drive roller 805 is driven to rotate, which winds up the push pad 823, so that the empty groove 824 moves between the two sets of winding mechanisms 8.

[0076] Subsequently, the outermost second half electromagnet 304 is de-energized, the magnetic repulsion disappears, the second spring 505 pushes the second magnet block 502 and the second piston column 504 to reset, and the hydraulic oil in the folded liquid bladder 608 flows back into the second piston cylinder 503; the first spring 607 drives the rotating shaft 604 and the winding roller 605 to rotate, winding the traction rope 606, pulling the telescopic plate 609, the second extension plate 603, and the first extension plate 602 to retract into the fixed plate 601, and the winding mechanism 8 and the pusher pad 823 move backward and reset synchronously.

[0077] When the second half electromagnet 304 located on the innermost side is de-energized, the magnetic repulsion disappears, the first spring 403 pushes the first magnet block 402 and the first piston column 405 to reset, the hydraulic oil in the first hydraulic sleeve 810 flows back to the first piston cylinder 404, the fourth spring 814 pushes the first rack 812 to reset, the transmission gear 808, worm 806, and worm wheel 807 drive the active roller 805 to reset, the push pad 823 is pulled out from the passive roller 804, the passive roller 804 rotates and tightens the second spring 825, completing the reset, and can enter the next push operation.

[0078] During the push-out process, only the second half electromagnet 304 of the push station is energized. In the winding mechanism 8 of the working row, the passive rollers 804 of the winding mechanisms 8 on both sides are not clamped to stop rotation. When the folding push mechanism 6 pushes the winding mechanism 8 to extend, the push pad 823 can be pulled out from the passive roller 804. When the folding push mechanism 6 drives the winding mechanism 8 to retract, the passive roller 804 rotates under the action of the second spring 825 and automatically winds up the push pad 823.

[0079] When the innermost second half electromagnet 304 is energized, it pushes the first magnet block 402 and the first piston column 405 downward under the action of magnetic repulsion. The hydraulic oil in the first piston cylinder 404 enters the first liquid sleeve 810 through the first flexible tube 406, which pushes the first rack 812 to move. Through the transmission gear 808, worm 806 and worm wheel 807, the drive roller 805 is driven to rotate, which winds up the push pad 823, so that the empty groove 824 moves between the two sets of winding mechanisms 8.

[0080] The second half electromagnet 304, located on the outermost side of the rear row, is energized. Under the action of magnetic repulsion, it pushes the second magnet block 502 and the second piston column 504 to move downward. The hydraulic oil in the second piston cylinder 503 enters the folding liquid bladder 608 through the fixed pipe 507. The folding liquid bladder 608 expands and pushes the telescopic plate 609, the second extension plate 603, and the first extension plate 602 to extend in sequence, so that the winding mechanism 8 extends backward. The winding mechanism 8 and the folding push mechanism 6 pass through the piled material.

[0081] Motor 202 drives conveyor roller 203 to rotate, conveyor roller 203 drives conveyor belt 205 to rotate, conveyor belt 205 drives folding push mechanism 6 to rotate to the left; when the first drive motor 4, the second drive motor 5, and folding push mechanism 6 move from below the second half electromagnet 304 to below the first half electromagnet 303, the first half electromagnet 303 is de-energized, the magnetic repulsion force corresponding to the second drive motor 5 disappears, the second spring 505 pushes the second magnet block 502 and the second piston column 504 to reset, the hydraulic oil in the folding liquid bladder 608 flows back, the first spring 607 drives the winding roller 605 to wind up the traction rope 606, so that the folding push mechanism 6 and the winding mechanism 8 retract and reset, avoiding pushing the material to the bottom of the frame during the rotation.

[0082] The innermost half electromagnet 303 is energized to keep the first rack 812 in the extended position. During the rotation, due to the change in position, the driving roller 805 remains stationary, and the pusher pad 823 is pulled out from the passive roller 804. After the rotation is completed, the second spring 825 drives the passive roller 804 to rotate, automatically rewinding the pulled-out pusher pad 823, completing the left and right pusher action cycle.

[0083] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The installation methods between equipment are also the same as conventional installation methods in the prior art. For example, the two ends of shaft-shaped parts are connected by bearings, the connection position of valve components is provided with anti-leakage rubber strips, the outside of threaded rods or lead rods is provided with dust covers, and the equipment can be driven by either built-in batteries or external power supply. The control method is automatic control by a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this invention is mainly used to protect mechanical devices, this invention will not explain the control method and circuit connection in detail. The external controller mentioned in the specification can play a control role for the electrical components mentioned herein, and the external controller is a conventional known device.

[0084] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A remotely controllable hydraulic self-dumping mine car, characterized by: The vehicle includes a dump truck (1), on which a conveyor (2) is mounted on the lower surface of the rear of the frame. A track (3) is mounted on the conveyor (2). Several first drive motors (4) are mounted on the outer surface of the conveyor (2). A second drive motor (5) is mounted on the front end of each of the first drive motors (4). A retractable and foldable folding push mechanism (6) is mounted on the front surface of the second drive motor (5). A winding mechanism (8) is fixedly mounted on the telescopic end of the folding push mechanism (6). A third drive motor (7) for driving the winding mechanism (8) is mounted on the top of the folding push mechanism (6).

2. A remotely controllable hydraulic self-dumping mine car according to claim 1, characterized in that: The conveyor (2) includes two support plates (201), which are fixedly connected by several pillars (204). The uppermost support plate (201) is fixedly mounted under the frame of the dump truck (1). The left and right ends of the middle of the two support plates (201) are rotatably connected to conveyor rollers (203) through bearings. A motor (202) is fixedly installed on the top of the support plate (201). The output end of the motor (202) is connected to the top of a conveyor roller (203) through a coupling. A conveyor belt (205) for transmission connection is sleeved on the outer side of the two conveyor rollers (203).

3. A remotely controllable hydraulic self-dumping mine car according to claim 2, characterized in that: The first drive machine (4) includes a first drive rail (401), and the side of the first drive rail (401) is mounted on the outer surface of the conveyor belt (205). A first piston cylinder (404) is fixedly installed inside the first drive rail (401). A first piston column (405) is slidably installed inside the first piston cylinder (404). The top end of the first piston column (405) extends above the first piston cylinder (404) and a first magnet block (402) is fixedly installed thereon. A first spring (403) is sleeved on the outer side of the first piston column (405). The top end of the first spring (403) is connected to the bottom end of the first magnet block (402). The bottom end of the first spring (403) is connected to the top end of the first piston cylinder (404). A first flexible tube (406) is fixedly installed at the liquid outlet of the bottom end of the first piston cylinder (404).

4. A remotely controllable hydraulic self-dumping mine car according to claim 3, characterized in that: The second drive unit (5) includes a second drive rail (501), which is mounted in front of the first drive rail (401). A second piston cylinder (503) is fixedly installed inside the second drive rail (501). A second piston column (504) is slidably installed inside the second piston cylinder (503). The top of the second piston column (504) extends above the second piston cylinder (503) and is fixedly installed with a second magnet block (502). A second spring (505) is sleeved on the outside of the second piston column (504). The top of the second spring (505) is connected to the bottom of the second magnet block (502). The bottom of the second spring (505) is connected to the top of the second piston cylinder (503). A fixed pipe (507) is fixedly installed at the outlet of the second piston cylinder (503).

5. A remotely controllable hydraulic self-dumping mine car as defined in claim 4, characterized in that: The track (3) includes a track body (301), which is fixedly mounted on the outer side of the uppermost support plate (201). The track body (301) has two sets of annular cavities (302) inside. A first half electromagnet (303) is fixedly installed at the front of each annular cavity (302), and a second half electromagnet (304) is fixedly installed at the rear of each annular cavity (302). A first guide block (407) is fixedly installed at the top of the first drive rail (401), and a second guide block (506) is fixedly installed at the top of the second drive rail (501). The tops of the first guide block (407) and the second guide block (506) extend into the two annular cavities (302), respectively. The first magnet block (402) and the second magnet block (502) are magnetically engaged with the first half electromagnet (303) and the second half electromagnet (304) inside the two annular cavities (302), respectively.

6. A remotely controllable hydraulic self-dumping mine car according to claim 5, characterized in that: The folding push mechanism (6) includes a fixed plate (601), which is fixedly mounted in front of the second drive rail (501). A first extension plate (602) is slidably mounted inside the fixed plate (601), with its front end extending to the front of the fixed plate (601). A second extension plate (603) is slidably mounted inside the first extension plate (602), with its front end extending to the front of the first extension plate (602). A telescopic plate (609) is slidably mounted inside the second extension plate (603), with its front end extending to the front of the second extension plate (603). A folding liquid bladder (608) is fixedly mounted at the rear end of the telescopic plate (609). 8) The rear end passes through the second extension plate (603) and the first extension plate (602) and is fixedly connected to one side of the inner cavity of the fixed plate (601). One end of the fixed tube (507) extends into the interior of the folded liquid bladder (608). The fixed plate (601) is rotatably connected to the rotating shaft (604) through the bearing. The rotating shaft (604) is fixedly fitted with a winding roller (605) on the outside and above and below the folded liquid bladder (608). The winding roller (605) is wound with a traction rope (606) on the outside. One end of the traction rope (606) is fixedly connected to the rear end of the telescopic plate (609). The top end of the inner cavity of the fixed plate (601) is fixedly installed with a first spring (607). One end of the first spring (607) is fixedly connected to the outside of the rotating shaft (604).

7. A remotely controllable hydraulic self-dumping mine car according to claim 6, characterized in that: The dump truck (1) includes a cargo box (101), the cargo box (101) is installed on the dump truck (1), the rear end of the cargo box (101) is hinged to a rear tail plate (102), and the dump truck (1) is equipped with a drive assembly that can be remotely started to drive the cargo box (101) to rotate.

Images