An electric grader for open-pit mine construction

Abstract

The present invention relates to the technical field of earth-moving engineering machinery, and in particular to an electric grader for open-pit mine engineering construction, comprising a grader body and an ore crushing device, wherein the ore crushing device comprises a stone crushing assembly fixedly arranged on the front of the grader body, a discharging assembly installed on the bottom of the discharging assembly, a feeding assembly fixedly arranged on a side of the stone crushing assembly away from the grader body, and a material introduction frame detachably connected and arranged on a side of the feeding assembly away from the stone crushing assembly, a gathering shovel is fixedly arranged on a side of the material introduction frame away from the feeding assembly, the gathering shovel introduces stone and soil into the feeding assembly through the material introduction frame, the stone and soil are fed into the stone crushing assembly through the feeding assembly, the ore and soil blocks are crushed into particles to the discharging assembly through the stone crushing assembly, and the material is discharged according to the steering direction of the grader body through the discharging assembly to improve the leveling efficiency of the grader body for the ore section.

Description

Technical Field

[0001] The invention relates to the technical field of earth-moving engineering machinery, and in particular to an electric grader for open-pit mine engineering construction. Background Art

[0002] A grader is an earth-moving machine that uses a scraper to level the ground. When a grader is used to repair a mine road surface, the mine road surface is processed by the scraper or scraper of the grader to make the mine road surface flat and ensure that the material is not too bumpy when transporting. For example, Chinese patent CN201910858066.7 discloses a motor grader, including: a main frame; an operating frame that can move relative to the main frame in three directions; and a connecting rod system that connects the operating frame to the main frame. The connecting rod system includes a plurality of hydraulic cylinders, each of which can move between an extended position and a retracted position to adjust the length of each hydraulic cylinder. The plurality of hydraulic cylinders are operatively connected so that the movement of one of the plurality of hydraulic cylinders causes at least another of the plurality of hydraulic cylinders to move. The processor is configured to: receive a signal related to the length of at least one of the plurality of hydraulic cylinders; and estimate the position of the operating frame relative to the main frame in the three directions based in part on the signal.

[0003] However, the existing mine road surface contains a large amount of crushed stones, and some of the crushed stones are large in size. When the grader moves to level the mine road surface, the front part of the grader is prone to collide with the large crushed stones, causing damage to the front part of the grader. In addition, the large crushed stones are located at the front side of the grader and are difficult to move away, which hinders the movement of the grader and affects the efficiency of leveling the mine road surface. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an electric grader for open-pit mine construction to solve the problems raised in the above background technology.

[0005] Based on the above purpose, the present invention provides an electric grader for open-pit mine construction, comprising a grader body and an ore crushing device, wherein the ore crushing device comprises:

[0006] A stone crushing assembly is fixedly mounted on the front of the motor grader body;

[0007] A discharge assembly, mounted at the bottom of the discharge assembly;

[0008] A feeding assembly is fixedly arranged on a side of the stone crushing assembly away from the motor grader body, the feeding assembly is communicated with a point of the discharge assembly near the top, and the feeding assembly is drivingly connected with the discharge assembly and the stone crushing assembly;

[0009] A material introduction frame is detachably connected and arranged on a side of the feeding assembly away from the stone crushing assembly, the material introduction frame is connected to a point of the feeding assembly near the bottom, and a material gathering shovel is fixedly arranged on a side of the material introduction frame away from the feeding assembly;

[0010] Among them, the gathering shovel introduces the stone and soil into the feeding assembly through the feeding frame, and the stone and soil are sent to the crushing assembly through the feeding assembly. The ore and soil blocks are crushed into particles by the crushing assembly and sent to the discharge assembly. The discharge assembly discharges the materials according to the steering direction of the grader body to improve the leveling efficiency of the grader body on the ore section.

[0011] Preferably, the stone crushing assembly comprises:

[0012] A box body, the discharge assembly is arranged on the inner bottom of the box body, the sides of the box body are provided with discharge ports connected with the discharge assembly, and the top of the box body close to the feeding assembly is provided with a feed port;

[0013] Two crushing rollers are rotatably connected and arranged inside the box body. One end of each crushing roller passes through the box body and is fixed with a first gear. The two first gears are meshed, and the other end of one of the crushing rollers is transmission-connected to the feeding assembly.

[0014] Preferably, the discharge assembly comprises:

[0015] A mounting plate is fixedly mounted at a location of the box body near the inner bottom, arc-shaped leak-proof plates are fixedly mounted at both ends of the mounting plate, each of the arc-shaped leak-proof plates is tangent to the bottom of the box body, and the arc-shaped leak-proof plates are respectively arranged near the discharge port;

[0016] A telescopic plate is arranged inside the box in an inclined state, one end of the telescopic plate is slidably connected to the top of the mounting plate, and the other end is slidably connected to the inner wall of the box, and is arranged close to the crushing roller;

[0017] A driving member, arranged at the bottom of the mounting plate, the driving member being in driving connection with the telescopic plate to control the tilting direction of the telescopic plate;

[0018] A first motor is fixedly mounted on the outside of the box;

[0019] Two unloading wheel teeth are respectively arranged between the discharge port and the arc-shaped leak-proof plate, each of the unloading wheel teeth is coaxially arranged with the arc-shaped leak-proof plate, the shaft rod of one of the unloading wheel teeth is fixedly connected to the output shaft of the first motor, and the shaft rod of the other unloading wheel tooth is transmission-connected to the feeding assembly, and the same side of the two unloading wheel teeth is transmission-connected with a first belt-type synchronous wheel set, and the belt of the first belt-type synchronous wheel set is arranged in the shape of a Möbius belt, so that the two unloading wheel teeth rotate synchronously in opposite directions.

[0020] Preferably, the telescopic plate comprises:

[0021] The outer plate has a first slider rotatably connected to the side of one end thereof, and a slot is provided at the other end thereof, each of the first sliders is slidably connected to the inner wall of the box body, and each of the first sliders can move arbitrarily along the length direction of the box body;

[0022] The inner plate has a second slider hinged on one end thereof, and the other end is arranged in the slot, a connecting block is fixedly arranged at the bottom of each of the second sliders, each of the connecting blocks is penetrated through the top of the mounting plate, each of the connecting blocks can move arbitrarily along the length direction of the mounting plate, and one of the connecting blocks is drivingly connected to the driving member;

[0023] Two waist-shaped through holes are respectively arranged on one side of the box body, and a convex shaft is provided inside each of the waist-shaped through holes. One end of each convex shaft is fixedly connected to one side of the inner plate, and the inner plate drives the convex shaft to move up and down in the waist-shaped through hole to limit the switching of the tilting direction of the inner plate and the outer plate.

[0024] Preferably, the driving member comprises:

[0025] A rack fixedly mounted on the bottom of the mounting plate;

[0026] The second motor is fixed on the connecting block, the output shaft of the second motor passes through the connecting block and is fixed with a second gear, and the second gear is meshed with the rack.

[0027] Preferably, the feeding assembly comprises:

[0028] A mounting frame, fixedly connected to the box body;

[0029] A vertical conveyor belt is rotatably connected and arranged inside the installation frame, and a plurality of loading inclined plates are fixedly arranged on the vertical conveyor belt;

[0030] A second belt-type synchronous wheel set is arranged outside the installation frame, one pulley of the second belt-type synchronous wheel set is fixedly connected to the shaft rod of the vertical conveyor belt, and the other pulley is fixedly connected to the shaft rod of the crushing roller, and the pulley on the vertical conveyor belt is larger than the pulley on the crushing roller;

[0031] A reducer is fixedly arranged on one side of the installation frame, one end of the reducer is fixedly connected to the shaft rod of the vertical conveyor belt, and the other end is fixedly connected to the shaft rod of the discharge wheel teeth.

[0032] Preferably, a fixing plate is fixed on the top of the material guide frame, and at least two locking holes are opened on the fixing plate. A plurality of mounting holes adapted to the locking holes are opened on the outer wall of the mounting frame, and the mounting holes and the locking holes are fixed to the mounting frame by bolts, and the height of the material guide frame is controlled according to the position of the mounting holes.

[0033] Preferably, the aggregate shovel is provided with a plurality of soil filtering holes, and one end of the raw material guiding frame of the aggregate shovel is fixedly provided with a plurality of soil shoveling teeth.

[0034] The beneficial effects of the present invention are as follows: the crushing assembly, the discharging assembly, the feeding assembly, the material guide frame and the gathering shovel are driven to move by the grader body, so that the gathering shovel introduces the ore and the clod into the feeding assembly through the material guide frame, and the ore and the clod are driven by the feeding assembly to be transported to the crushing assembly for crushing, and the ore and the clod after crushing fall into the discharging assembly, and the discharging assembly is used to discharge the material according to the steering direction of the grader body, so that the section of the grader body after the ore and the clod are crushed can be leveled, thereby realizing the protection of the shovel blade of the grader body and further improving the leveling efficiency of the ore section. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the front three-dimensional structure of an ore crushing device according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the back three-dimensional structure of the ore crushing device according to an embodiment of the present invention;

[0039] Figure 4 It is a schematic diagram of the three-dimensional structure inside the box body of an embodiment of the present invention;

[0040] Figure 5 It is a schematic diagram of the three-dimensional structure of the discharge assembly according to an embodiment of the present invention;

[0041] Figure 6 It is a schematic diagram of the three-dimensional structure of the bottom of the mounting plate according to an embodiment of the present invention.

[0042] The markings in the figure are:

[0043] 1. Grader body; 2. Crushing assembly; 3. Discharging assembly; 4. Feeding assembly; 5. Leading frame; 6. Gathering shovel; 7. Box; 8. Discharging port; 9. Feeding port; 10. Crushing roller; 11. First gear; 12. Mounting plate; 13. Arc-shaped leak-proof plate; 14. Telescopic plate; 15. First motor; 16. Discharging wheel teeth; 17. First belt-type synchronous wheel set; 18. Outer plate; 19. First slider; 2 0. Slot; 21. Inner plate; 22. Second slider; 23. Connecting block; 24. Waist-shaped through hole; 25. Cam shaft; 26. Rack; 27. Second motor; 28. Second gear; 29. ​​Mounting frame; 30. Vertical conveyor belt; 31. Loading ramp; 32. Second belt synchronous wheel set; 33. Reducer; 34. Fixed plate; 35. Locking hole; 36. Mounting hole; 37. Filter hole; 38. Shovel tooth. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0045] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] like Figures 1 to 6 As shown, an electric grader for open-pit mine construction includes a grader body 1 and an ore crushing device, wherein the ore crushing device includes:

[0047] A stone crushing assembly 2 is fixedly mounted on the front of the motor grader body 1;

[0048] A discharge assembly 3, mounted at the bottom of the discharge assembly 3;

[0049] A feeding assembly 4 is fixedly mounted on a side of the stone crushing assembly 2 away from the motor grader body 1, the feeding assembly 4 is connected to a portion of the discharge assembly 3 near the top, and the feeding assembly 4 is transmission-connected to the discharge assembly 3 and the stone crushing assembly 2;

[0050] A material introduction frame 5 is detachably connected and arranged on a side of the feeding component 4 away from the crushing component 2, the material introduction frame 5 is connected to a point near the bottom of the feeding component 4, and a gathering shovel 6 is fixedly arranged on the side of the material introduction frame 5 away from the feeding component 4;

[0051] Among them, the gathering shovel 6 introduces the stone and soil into the feeding component 4 through the feeding frame 5, and the stone and soil are sent to the crushing component 2 through the feeding component 4. The ore and soil blocks are crushed into particles by the crushing component 2 to the discharge component 3, and the discharge component 3 discharges the material according to the steering direction of the grader body 1 to improve the leveling efficiency of the grader body 1 on the ore road section.

[0052] For example, the grader body 1 drives the crushing component 2, the discharging component 3, the feeding component 4, the guide frame 5 and the gathering shovel 6 to move, so that the gathering shovel 6 introduces the ore and clods into the feeding component 4 through the guide frame 5, and the feeding component 4 drives the ore and clods to be transferred to the crushing component for crushing. The crushed ore and clods fall into the discharging component 3, and the discharging component 3 is used to discharge according to the steering direction of the grader body 1, so that the road section after the ore and clods of the grader body 1 are crushed can be leveled, thereby realizing the protection of the shovel blade of the grader body 1 and further improving the leveling efficiency of the ore section.

[0053] As an optional embodiment, the stone crushing assembly 2 includes:

[0054] A box body 7, the discharge assembly 3 is arranged at the inner bottom of the box body 7, the sides of the box body 7 are provided with discharge ports 8 connected with the discharge assembly 3, and the top of the box body 7 close to the feeding assembly 4 is provided with a feed port 9;

[0055] Two crushing rollers 10 are rotatably connected and arranged inside the box body 7. One end of each crushing roller 10 passes through the box body 7 and is fixed with a first gear 11. The two first gears 11 are meshed, and the other end of one of the crushing rollers 10 is transmission-connected to the feeding assembly 4.

[0056] For example, a crushing roller 10 is driven to rotate by the feeding assembly 4, and the crushing roller 10 drives the first gear 11 to rotate. Through the meshing of the two first gears 11, the two crushing rollers 10 work to complete the crushing of ore and soil.

[0057] As an optional embodiment, the discharge assembly 3 includes:

[0058] A mounting plate 12 is fixedly mounted at a location near the inner bottom of the box body 7, and arc-shaped leak-proof plates 13 are fixedly mounted at both ends of the mounting plate 12, each of the arc-shaped leak-proof plates 13 is tangent to the bottom of the box body 7, and the arc-shaped leak-proof plates 13 are respectively arranged near the discharge port 8;

[0059] A telescopic plate 14 is arranged inside the box body 7 in an inclined state, one end of the telescopic plate 14 is slidably connected to the top of the mounting plate 12, and the other end is slidably connected to the inner wall of the box body 7, and is arranged close to the crushing roller 10;

[0060] A driving member, disposed at the bottom of the mounting plate 12, the driving member being in transmission connection with the telescopic plate 14 to control the tilting direction of the telescopic plate 14;

[0061] The first motor 15 is fixedly mounted on the outside of the box 7;

[0062] Two unloading wheel teeth 16 are respectively arranged between the discharge port 8 and the arc-shaped leak-proof plate 13, and each of the unloading wheel teeth 16 is coaxially arranged with the arc-shaped leak-proof plate 13. The shaft of one of the unloading wheel teeth 16 is fixedly connected to the output shaft of the first motor 15, and the shaft of the other unloading wheel tooth 16 is transmission-connected to the feeding assembly 4. The same side of the two unloading wheel teeth 16 is transmission-connected with a first belt-type synchronous wheel set 17, and the belt of the first belt-type synchronous wheel set 17 is arranged in the shape of a Möbius belt so that the two unloading wheel teeth 16 rotate synchronously in opposite directions.

[0063] For example, a discharge wheel tooth 16 is driven to rotate by the first motor 15, and the discharge wheel tooth 16 causes the two discharge wheel teeth 16 to rotate synchronously in opposite directions through the first belt synchronous wheel set 17. After the ore and soil are crushed, the telescopic plate 14 in an inclined state slides to between the arc-shaped leak-proof plate 13 and the discharge wheel tooth 16 on the left, and the crushed stone and soil are discharged from the left discharge port 8 through the discharge wheel tooth 16 on the left. At this time, the grader body 1 turns left after moving a certain distance to level the broken stone and soil section. At the same time, the driving member drives the telescopic plate 14 to work, so that the inclination direction of the telescopic plate 14 is switched, so that the crushed stone and soil continue to be discharged toward the unprocessed ore section, ensuring that the leveled section is not subjected to secondary processing.

[0064] As an optional embodiment, the telescopic plate 14 includes:

[0065] The outer plate 18 has a first slider 19 rotatably connected to the side of one end thereof, and a slot 20 is provided at the other end thereof. Each of the first sliders 19 is slidably connected to the inner wall of the box body 7, and each of the first sliders 19 can move arbitrarily along the length direction of the box body 7;

[0066] The inner plate 21 has a second slider 22 hingedly disposed on one end thereof, and the other end thereof is disposed in the slot 20. A connecting block 23 is fixedly disposed at the bottom of each of the second sliders 22. Each of the connecting blocks 23 is penetrated through the top of the mounting plate 12. Each of the connecting blocks 23 can be moved arbitrarily along the length direction of the mounting plate 12, and one of the connecting blocks 23 is drivingly connected to the driving member.

[0067] Two waist-shaped through holes 24 are respectively arranged on one side of the box body 7, and a convex shaft 25 is provided inside each of the waist-shaped through holes 24. One end of each convex shaft 25 is fixedly connected to one side of the inner plate 21, and the inner plate 21 drives the convex shaft 25 to move up and down in the waist-shaped through hole 24 to limit the switching of the tilting direction of the inner plate 21 and the outer plate 18.

[0068] As an optional embodiment, the driving member includes:

[0069] A rack 26 is fixed to the bottom of the mounting plate 12;

[0070] The second motor 27 is fixed on the connecting block 23 . The output shaft of the second motor 27 passes through the connecting block 23 and is fixed with a second gear 28 . The second gear 28 is meshed with the rack 26 .

[0071] For example, when the tilting direction of the telescopic plate 14 is switched, the second motor 27 drives the second gear 28 to rotate on the rack 26, so that the second gear 28 drives the second motor 27 to move, the second motor 27 drives the connecting block 23 to move, the connecting block 23 drives the second slider 22 to move, the second slider 22 drives the inner plate 21 to move, the inner plate 21 drives the outer plate 18 to move, the inner plate 21 and the outer plate 18 are restricted by the convex shaft 25 and the waist-shaped through hole 24, so that the outer plate 18 drives the first slider 19 to move from one side of the box body 7 to the other side, so as to complete the tilting direction switching of the entire telescopic plate 14.

[0072] As an optional embodiment, the feeding assembly 4 includes:

[0073] An installation frame 29, fixedly connected to the box body 7;

[0074] A vertical conveyor belt 30 is rotatably connected and arranged inside the mounting frame 29, and a plurality of loading inclined plates 31 are fixedly arranged on the vertical conveyor belt 30;

[0075] A second belt-type synchronous wheel set 32 ​​is arranged outside the mounting frame 29, one pulley of the second belt-type synchronous wheel set 32 ​​is fixedly connected to the shaft of the vertical conveyor belt 30, and the other pulley is fixedly connected to the shaft of the crushing roller 10, and the pulley on the vertical conveyor belt 30 is larger than the pulley on the crushing roller 10;

[0076] The reducer 33 is fixedly mounted on one side of the mounting frame 29 , one end of the reducer 33 is fixedly connected to the shaft of the vertical conveyor belt 30 , and the other end of the reducer 33 is fixedly connected to the shaft of the unloading gear 16 .

[0077] For example, the discharge wheel teeth 16 drive the reducer 33 to work, the reducer 33 drives the vertical conveyor belt 30 to work, and the vertical conveyor belt 30 drives the loading inclined plate 31 to operate to complete the transportation of ore and soil blocks. The vertical conveyor belt 30 also drives the second belt synchronous wheel group 32 to work, so that a crushing roller 10 rotates to complete the transmission control of the crushing assembly.

[0078] As an optional embodiment, a fixing plate 34 is fixed to the top of the material guide frame 5, and at least two locking holes 35 are opened on the fixing plate 34. A plurality of mounting holes 36 adapted to the locking holes 35 are opened on the outer wall of the mounting frame 29, and the mounting holes 36 and the locking holes 35 are fixed to the mounting frame 29 by bolts, and the height of the material guide frame 5 is controlled according to the position of the mounting holes 36.

[0079] For example, when the material gathering shovel 6 is not in use, locking holes 35 and mounting holes 36 are provided, and bolts are used to complete the fixing relationship between the fixing plate 34 and the mounting frame 29 to control the position of the material guiding frame 5 on the mounting frame 29, so that the material gathering shovel 6 does not contact the ground when not in use, thereby preventing the material gathering shovel 6 from being damaged.

[0080] As an optional embodiment, the aggregating shovel 6 is provided with a plurality of soil filtering holes 37 , and one end of the raw material guiding frame 5 of the aggregating shovel 6 is fixedly provided with a plurality of soil shoveling teeth 38 .

[0081] For example, by providing a plurality of soil filter holes 37 on the aggregate shovel 6, the processed stones and soil blocks can be directly filtered to the back, and the leveling work can be performed by the grader body 1, thereby reducing repetitive work and improving the efficiency of processing the ore section. By providing soil shovel teeth 38, the ore and soil blocks can be better distinguished from the processed gravel and soil, and the ore and soil blocks can be pulled onto the aggregate shovel 6.

[0082] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electric grader for open-pit mine construction, comprising a grader body (1) and an ore crushing device, characterized in that: The ore crushing device comprises: A stone crushing assembly (2) fixedly mounted on the front of the motor grader body (1); A discharge assembly (3) mounted at the bottom of the discharge assembly (3); A feeding assembly (4) is fixedly mounted on a side of the stone crushing assembly (2) away from the motor grader body (1), the feeding assembly (4) is connected to a point near the top of the discharge assembly (3), and the feeding assembly (4) is drivingly connected to the discharge assembly (3) and the stone crushing assembly (2); A material introduction frame (5) is detachably connected and arranged on a side of the feeding component (4) away from the stone crushing component (2), the material introduction frame (5) is connected to a point near the bottom of the feeding component (4), and a material gathering shovel (6) is fixedly provided on the side of the material introduction frame (5) away from the feeding component (4); The collecting shovel (6) introduces the stone and soil into the feeding assembly (4) through the feeding frame (5), and the stone and soil are fed into the stone crushing assembly (2) through the feeding assembly (4). The stone crushing assembly (2) crushes the ore and soil into particles and sends them to the discharging assembly (3). The discharging assembly (3) discharges the material according to the steering direction of the leveling machine body (1), so as to improve the leveling efficiency of the leveling machine body (1) on the ore road section. The stone crushing assembly (2) comprises: A box body (7), wherein the discharge assembly (3) is arranged at the inner bottom of the box body (7), a discharge port (8) communicating with the discharge assembly (3) is provided on the side of the box body (7), and a feed port (9) is provided on the top of the box body (7) on the side close to the feed assembly (4); Two crushing rollers (10) are both rotatably connected and arranged inside the box (7); one end of each crushing roller (10) passes through the box (7) and is fixedly provided with a first gear (11); the two first gears (11) are meshed, and the other end of one of the crushing rollers (10) is transmission-connected to the feeding assembly (4); The discharge assembly (3) comprises: A mounting plate (12) is fixedly mounted on a location of the box body (7) near the inner bottom, arc-shaped leak-proof plates (13) are respectively fixedly mounted on both ends of the mounting plate (12), each of the arc-shaped leak-proof plates (13) is tangent to the bottom of the box body (7), and the arc-shaped leak-proof plates (13) are respectively arranged near the discharge port (8); A telescopic plate (14) is arranged in an inclined state inside the box (7), one end of the telescopic plate (14) is slidably connected to the top of the mounting plate (12), and the other end is slidably connected to the inner wall of the box (7), and is arranged close to the crushing roller (10); A driving member, arranged at the bottom of the mounting plate (12), the driving member being in driving connection with the telescopic plate (14) so ​​as to control the tilting direction of the telescopic plate (14); A first motor (15) is fixedly mounted on the outside of the box (7); Two unloading wheel teeth (16) are respectively arranged between the discharge port (8) and the arc-shaped leak-proof plate (13); each of the unloading wheel teeth (16) is respectively arranged coaxially with the arc-shaped leak-proof plate (13); the shaft of one of the unloading wheel teeth (16) is fixedly connected to the output shaft of the first motor (15); the shaft of the other unloading wheel tooth (16) is transmission-connected to the feeding assembly (4); a first belt-type synchronous wheel set (17) is transmission-connected on the same side of the two unloading wheel teeth (16); and the belt of the first belt-type synchronous wheel set (17) is arranged in the shape of a Mobius belt, so that the two unloading wheel teeth (16) rotate synchronously in opposite directions.

2. The electric grader for open-pit mine construction according to claim 1, characterized in that: The telescopic plate (14) comprises: The outer plate (18) has a first slider (19) rotatably connected to the side of one end thereof, and a slot (20) is provided at the other end thereof, each of the first sliders (19) being slidably connected to the inner wall of the box body (7), and each of the first sliders (19) can move arbitrarily along the length direction of the box body (7); The inner plate (21) has a second slider (22) hingedly provided on one end thereof and the other end thereof disposed in the slot (20); a connecting block (23) is fixedly provided at the bottom of each of the second sliders (22); each of the connecting blocks (23) is passed through the top of the mounting plate (12); each of the connecting blocks (23) is movable arbitrarily along the length direction of the mounting plate (12); and one of the connecting blocks (23) is drivingly connected to the driving member; Two waist-shaped through holes (24) are respectively arranged on one side of the box body (7), and a convex shaft (25) is arranged inside each waist-shaped through hole (24). One end of each convex shaft (25) is fixedly connected to one side of the inner plate (21), and the inner plate (21) drives the convex shaft (25) to move up and down in the waist-shaped through hole (24) to limit the switching of the tilting direction of the inner plate (21) and the outer plate (18).

3. The electric grader for open-pit mine construction according to claim 2, characterized in that: The driving member comprises: A rack (26) fixedly mounted on the bottom of the mounting plate (12); The second motor (27) is fixedly mounted on the connecting block (23); an output shaft of the second motor (27) passes through the connecting block (23) and is fixedly mounted with a second gear (28); and the second gear (28) is meshed with the rack (26).

4. The electric grader for open-pit mine construction according to claim 1, characterized in that: The feeding assembly (4) comprises: A mounting frame (29) fixedly connected to the box body (7); A vertical conveyor belt (30) is rotatably connected and arranged inside the installation frame (29), and a plurality of loading inclined plates (31) are fixedly arranged on the vertical conveyor belt (30); A second belt-type synchronous wheel set (32) is arranged outside the mounting frame (29), one pulley of the second belt-type synchronous wheel set (32) is fixedly connected to the shaft of the vertical conveyor belt (30), and the other pulley is fixedly connected to the shaft of the crushing roller (10), and the pulley on the vertical conveyor belt (30) is larger than the pulley on the crushing roller (10); A reducer (33) is fixedly mounted on one side of the mounting frame (29); one end of the reducer (33) is fixedly connected to the shaft of the vertical conveyor belt (30), and the other end is fixedly connected to the shaft of the discharge wheel gear (16).

5. The electric grader for open-pit mine construction according to claim 4, characterized in that: A fixing plate (34) is fixedly provided on the top of the material guiding frame (5), and at least two locking holes (35) are provided on the fixing plate (34). A plurality of mounting holes (36) matching the locking holes (35) are provided on the outer wall of the mounting frame (29), and the mounting holes (36) and the locking holes (35) are fixed to the mounting frame (29) by bolts, and the height of the material guiding frame (5) is controlled according to the positions of the mounting holes (36).

6. The electric grader for open-pit mine construction according to claim 1, characterized in that: The material gathering shovel (6) is provided with a plurality of soil filtering holes (37), and one end of the raw material guiding frame (5) of the material gathering shovel (6) is fixedly provided with a plurality of soil shoveling teeth (38).

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