Surface coal mine shovel plate hauler with lift control system

Abstract

The present application discloses a shovel plate type carrier with a lifting control system for open coal mine, belonging to the technical field of lifting and transportation, specifically comprising a front frame, a rear frame, a shovel plate and a lifting control system for lifting and tilting the shovel plate, which is improved for the traditional fixed shovel plate. Through the cooperation of the telescopic oil cylinder and the gear and rack mechanism, the shovel plate can move horizontally along the horizontal direction of the rotating frame, can be extended for a long distance to adapt to different loading and transportation tasks, and is configured with an optimized lifting control system. Through the cooperation of the lifting oil cylinder, the tilting oil cylinder and the balance tensioning assembly, on the one hand, it is beneficial to the stable loading of the shovel plate, and on the other hand, it compensates for the center of gravity deviation in the adjustment and maintenance process of the shovel plate in different states, improves the anti-deviation ability, and through the comprehensive cooperation of mechanical transmission precision, hydraulic lifting control intelligence and eccentric compensation dynamics, effectively solves the shortcomings of the traditional shovel plate carrier in adaptability, stability and efficiency.

Description

Technical Field

[0001] This invention relates to the field of lifting and transportation technology, and more specifically, to an open-pit coal mine shovel-type transport vehicle equipped with a lifting control system. Background Technology

[0002] The shovel loader is a special vehicle that integrates loading, transportation and unloading. It is widely used in underground coal mines and open-pit mines. It is especially suitable for long-distance transportation of heavy-duty supports, belt conveyor heads and tails and mobile substations in open-pit coal mines. When a mining face is completed, the shovel loader is needed to move these devices to another new working face. Its core advantages are high load-bearing capacity and adaptability to complex terrain.

[0003] For details, please refer to the content disclosed in patent numbers CN216922210U and CN102001604A. However, the length of the shovels in traditional forklifts is mostly fixed, requiring the preparation of various models of shovels to cope with different transportation tasks. Since they cannot match equipment and goods of different sizes, such as when transporting a 3m long hydraulic prop, the 1m and 2m long fixed shovels are obviously not long enough. The hydraulic prop has an excessively long outward extension section. If it is loaded and transported directly, it is easy to cause the center of gravity to shift, which poses a risk of tipping over.

[0004] Therefore, in response to the practical problems in the existing technology, an open-pit coal mine shovel-type transport vehicle with a lifting control system is proposed. Summary of the Invention

[0005] The purpose of this invention is to solve the practical problems in the prior art. It provides an open-pit coal mine shovel-type transport vehicle with a lifting control system. Through the comprehensive combination of precise mechanical transmission, intelligent hydraulic lifting control, and dynamic eccentricity compensation, it effectively solves the shortcomings of traditional shovel trucks in terms of adaptability, stability, and efficiency.

[0006] The objective of this invention can be achieved through the following technical solution: an open-pit coal mine shovel-type transport vehicle equipped with a lifting control system, including a front frame, a rear frame, a shovel, and a lifting control system for lifting and tilting the shovel, wherein the front frame and the rear frame are linked together by a hinged joint.

[0007] The front end of the front frame is equipped with a lifting seat via a guide seat. The bottom wall of the lifting seat outside the front frame is rotatably equipped with a rotating frame for horizontally moving the shovel plate. The rotating frame includes a horizontal plate and a U-shaped seat installed vertically. The upper two sides of the U-shaped seat are rotatably installed on the lower two sides of the lifting seat. The U-shaped seat and the horizontal plate form a through groove for the shovel plate to pass through laterally.

[0008] Telescopic cylinders with telescopic ends fixedly connected to the inner end of the shovel plate are fixedly installed on both sides of the inner end of the horizontal plate. Racks are embedded on both sides of the shovel plate along its front and rear telescopic direction. Gears that mesh with the racks are rotatably installed inside both ends of the U-shaped seat.

[0009] The lifting control system includes a pair of lifting cylinders fixedly mounted on the front frame for lifting the lifting seat, a tilting cylinder mounted on the inner end of the lifting seat with its driving end acting on the inner end of the shovel, and a balance tensioning assembly mounted on the rear frame with its traction end also acting on the inner end of the shovel.

[0010] Furthermore, the lifting seat includes a crossbeam slidably mounted on the front end of the guide seat and a U-shaped plate fixedly mounted to the crossbeam and sleeved with the guide seat, and a fixed shaft is fixedly inserted onto the crossbeam.

[0011] Furthermore, both sides of the bottom end of the crossbeam are provided with rotating grooves for the rotatable connection of the two ends of the upper part of the U-shaped seat, and the front and rear ends of the fixed shaft are fixedly extended into the rotating grooves to rotatably connect with the two ends of the upper part of the U-shaped seat.

[0012] Furthermore, guide rails are fixedly installed on both sides of the bottom end of the shovel plate, and slide rails for horizontal sliding of the guide rails are opened on the bottom wall of the U-shaped seat, the front frame, and the hinge seat.

[0013] Furthermore, a rotating shaft is fixedly installed on the bottom wall of the U-shaped plate, the fixed end of the tilting cylinder is rotatably installed on the rotating shaft through a rotating sleeve, and the telescopic end of the tilting cylinder is movably connected to the inner end of the shovel plate through an ear plate.

[0014] Furthermore, the balancing tensioning assembly includes a cable winch installed at the front end of the rear frame, on which two tensioning cables connected to the ear plates are wound up, and a pressure sensor is installed on the winding shaft of the cable winch.

[0015] Furthermore, a winding reel is installed at the bottom of the pair of gears in linkage, and a traction steel cable is wound on the winding reel. The outer ends of the pair of traction steel cables pass through the rotating frame and are fixedly installed on both sides of the bottom front end of the shovel plate.

[0016] Furthermore, both sides of the bottom end of the front end of the shovel plate are fixedly installed with fixed shafts that are fixedly connected to the outer end of the traction steel cable, and traction grooves for traction steel cable to pass through are also opened on both sides of the bottom end of the shovel plate.

[0017] Compared with the prior art, the advantages of this invention are:

[0018] This solution improves upon traditional fixed shovels by enabling the shovel to move laterally along the rotating frame through the coordinated operation of telescopic cylinders and a rack and pinion mechanism. This allows for long-distance extension to adapt to different loading and transportation tasks. An optimized lifting control system, utilizing lifting cylinders, tilting cylinders, and a balancing tensioning assembly, ensures stable load-bearing of the shovel and provides real-time torque compensation during horizontal movement to offset center of gravity shifts. Through the comprehensive integration of precise mechanical transmission, intelligent hydraulic lifting control, and dynamic eccentricity compensation, this solution effectively addresses the shortcomings of traditional shovel trucks in terms of adaptability, stability, and efficiency.

[0019] This solution also adds a winding reel linked to the bottom of a pair of gears. The winding reel winds up a traction steel cable fixedly installed at the bottom front of the shovel. The winding action of the traction steel cable is synchronized with the horizontal extension and retraction action of the shovel, keeping the longitudinal tension of the traction steel cable on the shovel constant. The tension of the steel cable provides a reverse torque, further realizing torque compensation and improving the anti-eccentricity ability. In addition, two rows of steel cables are set, one on each side, to form a planar constraint and limit the lateral swing of the shovel. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a cross-sectional view of the front frame of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the lifting seat, rotating frame, shovel plate, and balance tensioning assembly of the present invention. Figure 1 ;

[0023] Figure 4 This is a schematic diagram of the structure of the lifting seat, rotating frame, shovel plate, and balance tensioning assembly of the present invention. Figure 2 ;

[0024] Figure 5 This is a partial cross-sectional view of the junction between the shovel plate and the rotating frame of the present invention;

[0025] Figure 6 This is a bottom view of the junction between the shovel plate and the rotating frame of the present invention;

[0026] Figure 7 This is a schematic diagram of the overall structure of the present invention when the shovel plate is lifted.

[0027] Figure 8 This is a partial structural diagram of the present invention when the shovel plate is lifted.

[0028] Explanation of the labels in the diagram:

[0029] 1. Front frame; 2. Rear frame; 3. Hinge seat; 4. Shovel plate; 401. Guide rail; 5. Lifting seat; 51. Crossbeam; 52. U-shaped plate; 53. Fixed shaft; 6. Guide seat; 7. Rotating frame; 71. U-shaped seat; 72. Cross plate; 8. Lifting cylinder; 9. Telescopic cylinder; 10. Tilting cylinder; 11. Cable winch; 12. Tensioning cable; 13. Rack; 14. Gear; 15. Reel; 16. Traction cable. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Traditional forklifts typically have fixed forklift lengths, requiring various forklift models to handle different transport tasks. However, this often results in incompatibility with equipment and cargo of varying sizes. Therefore, the following technical solution is proposed:

[0032] This invention discloses an open-pit coal mine shovel-type transport vehicle equipped with a lifting control system. Please refer to [link / reference]. Figure 1 It includes a front frame 1, a rear frame 2, a shovel 4, and a lifting control system for lifting and tilting the shovel 4. The front frame 1 and the rear frame 2 are linked together by a hinged seat 3. Both the front frame 1 and the rear frame 2 are equipped with wheels, and the rear frame 2 is equipped with a driver's cab.

[0033] Please see Figures 2-4 A guide seat 6 is fixedly installed at the front end of the front frame 1. A lifting seat 5 is lifted and installed on the guide seat 6. A rotating frame 7 for horizontally moving the shovel plate 4 is rotatably installed on the bottom wall of the lifting seat 5 outside the front end of the front frame 1. A reserved cavity for rotating the rotating frame 7 is opened at the front end of the front support 1.

[0034] The rotating frame 7 includes a horizontal plate 72 and a U-shaped seat 71 installed vertically. The upper two sides of the U-shaped seat 71 are rotatably installed on the lower two sides of the lifting seat 5. The U-shaped seat 71 and the horizontal plate 72 form a through groove for the shovel plate 4 to pass through laterally. The inner two sides of the horizontal plate 72 are fixedly installed with telescopic cylinders 9 whose telescopic ends are fixedly connected to the inner end of the shovel plate 4.

[0035] Please see Figures 3-6The lifting seat 5 includes a crossbeam 51 slidably installed on the front end of the guide seat 6 and a U-shaped plate 52 fixedly installed on the crossbeam 51 and sleeved on the guide seat 6. A fixed shaft 53 is fixedly inserted on the crossbeam 51. Rotary grooves for rotatable connection between the upper two ends of the U-shaped seat 71 are opened on both sides of the bottom end of the crossbeam 51. The front and rear ends of the fixed shaft 53 are fixedly extended into the rotary grooves and rotatably connected to the upper two ends of the U-shaped seat 71. Guide rails 401 are fixedly installed on both sides of the bottom end of the shovel plate 4. The bottom walls of the U-shaped seat 71, the front frame 1, and the hinge seat 3 are all provided with slides for horizontal sliding of the guide rails 401.

[0036] The shovel plate 4 is fitted with racks 13 on both sides along its front-to-back extension direction. The U-shaped seat 71 has gears 14 rotatably installed inside both ends, which mesh with the racks 13. The gears 14 mesh and rotate through the horizontal movement of the racks 13. Compared with the shovel plate 4 being moved horizontally by the telescopic cylinder 9 alone, the gear-rack meshing transmission can eliminate lateral vibration, and the gears and racks can force guidance to avoid jamming caused by uneven loading of the cylinder. On the other hand, it can improve the self-locking performance. When the telescopic cylinder 9 stops supplying oil, the gears and racks automatically mesh and position themselves without the need for an additional locking device.

[0037] Please see Figures 2-4 The lifting control system includes a pair of lifting cylinders 8 fixedly installed on the front frame 1 for lifting the lifting seat 5, a tilting cylinder 10 installed on the inner end of the lifting seat 5 and whose driving end acts on the inner end of the shovel plate 4, and a balance tensioning assembly installed on the rear frame 2 and whose traction end also acts on the inner end of the shovel plate 4. A rotating shaft is fixedly installed on the bottom wall of the U-shaped plate 52. The fixed end of the tilting cylinder 10 is rotatably installed on the rotating shaft through a rotating sleeve. The telescopic end of the tilting cylinder 10 is movably connected to the inner end of the shovel plate 4 through an ear plate.

[0038] The basic principle of this embodiment is as follows: Before loading goods, the shovel plate 4 descends to the lowest point along with the rotating frame 7. According to the size of the required loading equipment or goods, a pair of telescopic cylinders 9 are activated to extend the shovel plate 4 outward. The stability of the shovel plate 4 after extension is improved by using gear-rack meshing transmission. During the movement and extension of the shovel plate 4, the tensioning steel cable 12 on the steel cable winch 11 is released accordingly to maintain tension.

[0039] At this time, the rear end of the shovel plate 4 is slightly lifted upward by the tilting cylinder 10, and the shovel plate 4 flips around the fixed shaft 53 fulcrum. The front end of the shovel plate 4 tilts slightly downward and contacts the ground. The upper surface of the shovel plate 4 forms a slightly inclined surface, which is conducive to the equipment being pulled onto the shovel plate 4. A chain winch can be added to the front frame 1 to facilitate the active traction of the equipment. Through the free extension and retraction of the shovel plate 4, it can be adapted to different loading and transportation tasks. There is no need to prepare multiple models of shovel plates to deal with different transportation tasks, thus improving work efficiency.

[0040] After the equipment is loaded, the tilting cylinder 10 restores the shovel plate 4 to a horizontal state. At this time, a pair of guide rails 401 retract back into the slide, which plays a role in balancing the load on the shovel plate 4 and improving the stability of the shovel plate 4 during transportation.

[0041] After arriving at the new working face, please refer to Figure 7 , Figure 8 The lifting seat 5 is raised moderately by a pair of lifting cylinders 8. The lifting seat 5 drives the rotating frame 7 and the shovel 4 to move upward. Then, the rear end of the shovel 4 is raised by a pair of tilting cylinders 10. The front end of the shovel 4 is slowly tilted downward and contacts the ground. At this time, the tilt angle of the shovel 4 is increased, which is conducive to unloading the equipment.

[0042] Example 2: Based on Example 1, this example provides a detailed description of the balancing tensioning assembly and adds a winding reel 15 and a traction cable 16 to further improve the anti-eccentricity capability of the shovel plate 4 in conjunction with the balancing tensioning assembly. The specific details are as follows:

[0043] Please see Figures 2-4 and Figure 8 The balancing tensioning assembly includes a cable winch 11 installed at the front end of the rear frame 2. Two tensioning cables 12 connected to the ear plates are wound on the cable winch 11. A pressure sensor is installed on the winding shaft of the cable winch 11. The preload of the tensioning cables 12 is actively adjusted according to the load on the shovel plate 4, the telescopic distance of the shovel plate 4, and the tilting angle. The tensioning cables 12 are released / tightened accordingly, and continuous fine-tuning is used to compensate for inertial offset. This is beneficial for compensating for the center of gravity offset during the adjustment and maintenance of the shovel plate 4 in different states, and improving the stability of the shovel plate 4 when carrying equipment.

[0044] In addition, please see Figures 5-7 A pair of gears 14 are linked to a winding reel 15 at the bottom. A traction steel cable 16 is wound on the winding reel 15. The outer ends of the pair of traction steel cables 16 pass through the rotating frame 7 and are fixedly installed on both sides of the bottom front end of the shovel plate 4. Fixed shafts that are fixedly connected to the outer ends of the traction steel cables 16 are fixedly installed on both sides of the bottom front end of the shovel plate 4. Traction grooves for traction of the traction steel cables 16 are also provided on both sides of the bottom end of the shovel plate 4.

[0045] The tensioning wheel applies initial tension to the steel cable, that is, provides initial preload, which is generally 5% to 10% of the maximum working load, so that the steel cable is always in a taut state. When the shovel plate 4 extends outward, the winding reel 15 rotates synchronously with the gear 14, and the traction steel cable 16 is released synchronously, keeping the longitudinal tension of the traction steel cable 16 on the shovel plate 4 constant. The tension of the steel cable provides reverse torque, further realizing torque compensation. In addition, one steel cable is set on each of the left and right sides of the double row to form a planar constraint and limit the lateral swing of the shovel plate 4.

[0046] In summary, this is an improvement on the traditional fixed shovel. Through the coordinated operation of the telescopic cylinder and the gear rack mechanism, the shovel 4 can move laterally along the rotating frame 7 in the horizontal direction. It can retract over long distances to pass through narrow alleys and extend over long distances to adapt to different loading and transportation tasks.

[0047] It is equipped with an optimized lifting control system, which utilizes the cooperation of lifting cylinders, tilting cylinders and balance tensioning components. On the one hand, it helps the shovel plate to bear load stably, and on the other hand, it realizes real-time torque compensation during the horizontal movement of the shovel plate to compensate for the center of gravity shift. In addition, by adding a winding reel 15 linked to the bottom of a pair of gears, a traction steel cable 16 fixedly installed at the bottom front of the shovel plate 4 is wound on the pair of winding reels 15. The winding action of the traction steel cable 16 is synchronized with the horizontal extension and retraction action of the shovel plate 4, thereby further tractioning the extension and retraction movement of the shovel plate 4 and improving the anti-eccentricity ability.

[0048] This technical solution effectively addresses the shortcomings of traditional shovel trucks in terms of adaptability, stability, and efficiency through a comprehensive approach that combines precise mechanical transmission, intelligent hydraulic lifting control, and dynamic eccentricity compensation.

[0049] The above are merely preferred embodiments of the present invention; however, 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 technical scope disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A surface coal mine shovel plate carrier with a lifting control system, comprising a front frame (1), a rear frame (2), a shovel plate (4), and a lifting control system for lifting and tilting the shovel plate (4), the front frame (1) and the rear frame (2) are connected and installed through a hinge seat (3), characterized in that: the front end of the front frame (1) is provided with a lifting seat (5) through a guide seat (6), the lifting seat (5) is rotatably installed at the bottom end wall outside the front frame (1), and a rotating frame (7) for horizontally moving the shovel plate (4) is rotatably installed at the bottom end wall outside the front frame (1), the rotating frame (7) comprises an upper and lower installed horizontal plate (72) and a U-shaped seat (71), and a through slot for the shovel plate (4) to transversely pass through is formed between the U-shaped seat (71) and the horizontal plate (72); both sides of the inner end of the horizontal plate (72) are fixedly provided with telescopic oil cylinders (9) which are fixedly connected with the inner end of the shovel plate (4), both sides of the left and right of the shovel plate (4) along the front and back telescopic direction are embeddedly provided with racks (13), and both inner sides of the left and right ends of the U-shaped seat (71) are rotatably provided with gears (14) which are engaged with the racks (13); a pair of the gears (14) are connected and installed at the bottom end of the reel (15), the reel (15) is provided with a traction cable (16) which is wound thereon, both sides of the outer end of the traction cable (16) pass through the rotating frame (7) and are fixedly installed at the bottom end of the front end of the shovel plate (4), both sides of the bottom end of the front end of the shovel plate (4) are fixedly provided with fixed shafts which are fixedly connected with the outer end of the traction cable (16), and both sides of the bottom end of the shovel plate (4) are provided with traction grooves for the traction cable (16) to pass through; the lifting control system comprises a pair of lifting oil cylinders (8) which are fixedly installed on the front frame (1) and are used for driving the lifting seat (5) to lift, a tilting oil cylinder (10) which is installed at the inner end of the lifting seat (5) and has a driving end acting on the inner end of the shovel plate (4), and a balance tensioning assembly which is installed on the rear frame (2) and has a traction end also acting on the inner end of the shovel plate (4). the lifting seat (5) comprises a cross beam (51) which is slidingly installed at the front end of the guide seat (6), and a U-shaped plate (52) which is fixedly installed with the cross beam (51) and is sleevedly installed with the guide seat (6), and the cross beam (51) is fixedly and plug-in installed with a fixed shaft (53).

2. A shovel-tracked hauler for surface coal mines with a lift control system according to claim 1, characterized in that: both sides of the bottom end of the cross beam (51) are provided with rotating grooves for the upper two ends of the U-shaped seat (71) to rotatably engage, and both ends of the fixed shaft (53) are fixedly extended into the rotating grooves and rotatably engage with the upper two ends of the U-shaped seat (71).

3. A surface coal mine shovel deck hauler with a lift control system as claimed in claim 2, characterised in that: both sides of the bottom end of the shovel plate (4) are fixedly provided with guide rails (401), and the U-shaped seat (71), the bottom end wall of the front frame (1) and the hinge seat (3) are provided with sliding grooves for the guide rails (401) to horizontally slide.

4. A shovel-tracked hauler for surface coal mines with a lift control system according to claim 1, characterized in that: the bottom end wall of the U-shaped plate (52) is fixedly provided with a rotating shaft, the fixed end of the tilting oil cylinder (10) is rotatably installed on the rotating shaft through a rotating sleeve, and the telescopic end of the tilting oil cylinder (10) is movably engaged with the inner end of the shovel plate (4) through an ear plate.

5. A shovel-tracked hauler for surface coal mines with a lift control system according to claim 2, characterized in that: ​ 6. A surface coal mine shovel deck hauler with a lift control system as claimed in claim 5, characterised in that: The balanced tension assembly comprises a cable winch (11) mounted on the front end of the rear frame (2), and two tension cables (12) connected with the ear plate are wound on the cable winch (11).

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