A multi-angle adjustable grader front frame and electric grader

Abstract

The present invention relates to the technical field of graders, and specifically to a multi-angle adjustable grader front frame and an electric grader, wherein the front frame includes a frame body, and also includes: a traction frame, an adjustment unit, a distance sensor and a controller, wherein: the traction frame is arranged below the frame body, one end of the traction frame is hinged to the front side of the frame body, the bottom of the traction frame is rotatably connected to a turntable, a mounting frame is arranged on the turntable, and the mounting frame is used to install the blade of the grader; the adjustment unit is transmission-connected to the traction frame, and is used to adjust the position of the blade by adjusting the position of the traction frame; two groups of distance sensors are arranged, and the two groups of distance sensors are respectively arranged on both sides of the mounting frame and are located directly above the back of the blade; the controller is electrically connected to the adjustment unit and the distance sensor. When the road surface encounters potholes or bumps, the present invention can timely adjust the corresponding height of the blade so that the blade can better level the ground.

Description

Technical Field

[0001] The present invention relates to the technical field of motor graders, and in particular to a multi-angle adjustable motor grader front frame and an electric motor grader. Background Art

[0002] A grader is an earth-moving machine that uses a scraper to level the ground. A cab-front grader includes a front frame and a rear frame. The front frame includes a frame body and an angle adjustment portion. For example, the patent application number 201410178935.9 discloses a grader with an adjustable tilt angle, including a locomotive, a front frame and a blade. The front end of the front frame is provided with a traction protrusion, and the middle of the front frame is provided with a left connecting ear and a right connecting ear. The grader with an adjustable tilt angle also includes a traction frame, a left hydraulic device and a right hydraulic device, and the blade is connected to the traction frame; the traction frame is a triangular structure, and the three ends of the triangular structure are respectively provided with a traction riveting point, a left riveting point and a right riveting point, and the traction riveting point is rotatably connected to the traction protrusion.

[0003] The inventors found that although the angle adjustment part of the existing front frame can complete the corresponding angle adjustment, it will change the original height of the shovel blade when there are potholes or bumps on the road surface. The angle adjustment part cannot adjust the corresponding height of the shovel blade in time, resulting in the shovel blade not being able to level the ground well. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a multi-angle adjustable grader front frame and an electric grader to solve the problem that when there are potholes or bumps on the road surface, the original height of the blade will be changed, and the angle adjustment part cannot adjust the corresponding height of the blade in time, resulting in the blade being unable to level the ground well.

[0005] Based on the above purpose, the present invention provides a multi-angle adjustable front frame of a grader, including a frame body, a traction frame, an adjustment part, a distance sensor and a controller, wherein:

[0006] The traction frame is arranged below the frame body, one end of the traction frame is hinged to the front side of the frame body, the bottom of the traction frame is rotatably connected to a turntable, the turntable is provided with a mounting frame, and the mounting frame is used to mount the blade of the grader;

[0007] The adjusting part is drivingly connected to the traction frame and is used to adjust the position of the blade by adjusting the position of the traction frame;

[0008] The distance sensors are provided in two groups, and the two groups of distance sensors are respectively arranged on both sides of the mounting frame and located just above the back side of the shovel blade;

[0009] The controller is electrically connected to the adjustment unit and the distance sensor;

[0010] The initial heights of the two groups of distance sensors are set, and the distances between the two groups of distance sensors and the road surface are set as two initial distances. When potholes or bumps appear on the road surface, the two groups of distance sensors detect the real-time distances. The controller calculates the adjustment amount based on the initial distance and the real-time distance, and controls the adjustment part to drive the blade to adjust the adjustment amount through the traction frame.

[0011] Optionally, the adjustment part includes two groups of connecting frames symmetrically arranged on both sides of the frame body, both groups of the connecting frames are hinged with a first mounting sleeve, a first hydraulic cylinder is hinged in the first mounting sleeve, the telescopic rod of the first hydraulic cylinder is hinged on the traction frame, one group of the connecting frames is hinged with a second mounting sleeve, a second hydraulic cylinder is hinged in the second mounting sleeve, the telescopic rod of the second hydraulic cylinder is hinged at one end of the traction frame, the second hydraulic cylinder is tilted, and a first hydraulic motor is provided on the traction frame, which is transmission connected to the turntable.

[0012] Optionally, the controller calculates the adjustment amount based on the initial distance and the real-time distance, including:

[0013] The real-time distance includes a first real-time distance and a second real-time distance respectively detected by two groups of distance sensors, and the adjustment amount includes a first adjustment amount and a second adjustment amount:

[0014] The first adjustment amount = the first real-time distance - the initial distance;

[0015] The second adjustment amount = the second real-time distance - the initial distance;

[0016] When the result of the first adjustment amount and the second adjustment amount is greater than 0, it indicates that the traction frame needs to be controlled to descend, and when the result of the first adjustment amount and the second adjustment amount is less than 0, it indicates that the traction frame needs to be controlled to ascend.

[0017] Optionally, a filter unit is further provided on the frame body, and the filter unit is used to filter stones to prevent a large amount of stones from piling up on the blade.

[0018] Optionally, the filter unit includes a first connecting rod arranged at the bottom of the frame body, two groups of frames are provided on the first connecting rod, multiple groups of rotating rollers are arranged side by side on the frames, the two groups of rotating rollers are arranged in an arrow shape, and an arc frame is provided on the frame, and the arc frame is fixed to the frame body through a second connecting rod.

[0019] Optionally, the first connecting rod is hollow, and one end of the two groups of frames are respectively fixedly connected with a third connecting rod and a fourth connecting rod, the third connecting rod passes through the fourth connecting rod, and the fourth connecting rod passes through the first connecting rod, the third connecting rod and the fourth connecting rod are both rotatably connected to the inside of the first connecting rod, the third connecting rod and the fourth connecting rod are transmission-connected with a driving part, the middle part of the frame is slidingly connected to the arc frame, the height of one frame is greater than the height of the other frame, and the two groups of frames can be driven to rotate to different angles by the driving part, and when the two groups of frames are fitted together, the rotating rollers in the two groups of frames are staggered and distributed to filter smaller stones.

[0020] In the process of filtering stones, some smaller stones may move to the shovel through the gap between the two rotating rollers. When smaller stones gather at the shovel, it will also have an impact. At this time, when there is no earth in front of the filter part or there is no earth in front of the filter part but there is earth some distance behind it, the third connecting rod or the fourth connecting rod can be controlled to rotate by the driving part. For example, the driving part controls the third connecting rod to rotate clockwise, thereby driving the frame under the third connecting rod to rotate clockwise until the two sets of frames are fitted. The rotating rollers in the two sets of frames are staggered, and the distance between the two conveying rollers can be shortened. Then the driving part continues to drive the two sets of frames to rotate clockwise at the same time through the third connecting rod and the fourth connecting rod to pass the earth in front of the shovel, and filter out the smaller ones, thus avoiding the adverse effects caused by the gathering of smaller stones at the shovel.

[0021] Optionally, when the two groups of the frames that have been bonded together need to filter smaller stones in a clockwise or counterclockwise direction, the turntable drives the shovel blade to rotate clockwise or counterclockwise at a predetermined angle to push the soil on one side of the shovel blade toward the frame.

[0022] Optionally, the driving unit includes a second hydraulic motor and a third hydraulic motor, the second hydraulic motor is transmission-connected to a first gear, the first gear is meshed with a second gear, the second gear is fixedly mounted on the third connecting rod, the third hydraulic motor is transmission-connected to a third gear, the third gear is meshed with a fourth gear, and the fourth gear is fixedly mounted on the fourth connecting rod.

[0023] Based on the same invention, the present invention also provides an electric grader, comprising:

[0024] The above-mentioned multi-angle adjustable grader front frame is provided with a set of front wheels;

[0025] The rear frame is fixedly arranged on one side of the front frame, a cab and a power unit of the grader are arranged on the rear frame, and two sets of rear wheels are arranged at the bottom of the rear frame.

[0026] During operation, the height of the shovel is first adjusted through the adjustment part according to the needs of the work. At this time, the distance sensor is equivalent to determining the initial height. The distances between the two groups of distance sensors and the road surface are set as two initial distances. When potholes or bumps appear on the road surface, the two groups of distance sensors detect the real-time distance. The controller calculates the adjustment amount based on the initial distance and the real-time distance, and controls the adjustment part to drive the shovel to adjust the adjustment amount through the traction frame, so that the height of the shovel from the road surface is always maintained within a reasonable range.

[0027] As can be seen from the above, when the road surface has potholes or bumps, the present invention can timely adjust the corresponding height of the shovel blade so that the shovel blade can better level the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 It is a structural schematic diagram of the front frame of an embodiment of the present invention;

[0030] Figure 2 for Figure 1 Top view of the middle arc frame;

[0031] Figure 3 for Figure 1 The enlarged view of point A in the middle;

[0032] Figure 4 The figure is a schematic diagram of the structure of a motor grader according to an embodiment of the present invention.

[0033] The numbers in the figure are:

[0034] 1. Frame body; 2. Traction frame; 3. Distance sensor; 4. Turntable; 5. Mounting frame; 6. Blade; 7. Connecting frame; 8. First mounting sleeve; 9. First hydraulic cylinder; 10. Second mounting sleeve; 11. Second hydraulic cylinder; 12. First connecting rod; 13. Frame; 14. Rotating roller; 15. Arc frame; 16. Second connecting rod; 17. Third connecting rod; 18. Fourth connecting rod; 19. Second hydraulic motor; 20. Third hydraulic motor; 21. First gear; 22. Second gear; 23. Third gear; 24. Fourth gear; 25. Front wheel; 26. Rear frame; 27. Cab; 28. Rear wheel. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] like Figure 1 As shown, a multi-angle adjustable front frame of a grader includes a frame body 1, a traction frame 2, an adjustment part, a distance sensor 3 and a controller, wherein:

[0038] The traction frame 2 is arranged below the frame body 1, one end of the traction frame 2 is hinged to the front side of the frame body 1, the bottom of the traction frame 2 is rotatably connected to a turntable 4, the turntable 4 is provided with a mounting frame 5, and the mounting frame 5 is used to mount a blade 6 of the grader;

[0039] The adjusting part is in driving connection with the traction frame 2, and is used to adjust the position of the scraper 6 by adjusting the position of the traction frame 2;

[0040] The distance sensor 3 is provided with two groups, and the two groups of distance sensors 3 are respectively arranged on both sides of the mounting frame 5 and are located just above the back side of the scraper 6;

[0041] The controller is electrically connected to the adjustment unit and the distance sensor 3;

[0042] The initial heights of the two groups of distance sensors 3 are set, and the distances between the two groups of distance sensors 3 and the road surface are set as two initial distances. When potholes or bumps appear on the road surface, the two groups of distance sensors 3 detect the real-time distances. The controller calculates the adjustment amount based on the initial distance and the real-time distance, and controls the adjustment part to drive the blade 6 to adjust the adjustment amount through the traction frame 2.

[0043] During operation, the height of the shovel blade 6 is first adjusted through the adjustment unit according to the needs of the work. At this time, the distance sensor 3 is equivalent to determining the initial height. The distances between the two groups of distance sensors 3 and the road surface are set as two initial distances. When potholes or bumps appear on the road surface, the two groups of distance sensors 3 detect the real-time distance. The controller calculates the adjustment amount based on the initial distance and the real-time distance, and controls the adjustment unit to drive the shovel blade 6 to adjust the adjustment amount through the traction frame 2, so that the height of the shovel blade 6 from the road surface is always maintained within a reasonable range.

[0044] As can be seen from the above, when the road surface has potholes or bumps, the present invention can timely adjust the corresponding height of the shovel blade 6 so that the shovel blade 6 can better level the ground.

[0045] In some embodiments, the adjustment part includes two groups of connecting frames 7 symmetrically arranged on both sides of the frame body 1, and the two groups of connecting frames 7 are hinged with a first mounting sleeve 8, and a first hydraulic cylinder 9 is hinged in the first mounting sleeve 8, and the telescopic rod of the first hydraulic cylinder 9 is hinged on the traction frame 2. One group of the connecting frames 7 is hinged with a second mounting sleeve 10, and a second hydraulic cylinder 11 is hinged in the second mounting sleeve 10, and the telescopic rod of the second hydraulic cylinder 11 is hinged at one end of the traction frame 2, and the second hydraulic cylinder 11 is tilted. The traction frame 2 is provided with a first hydraulic motor, and the first hydraulic motor is transmission-connected to the turntable 4.

[0046] The operation of the two first hydraulic cylinders 9 can drive the blade 6 on the corresponding side to rise or fall, the operation of the second hydraulic cylinder 11 can drive the traction frame 2 to move horizontally, and the first hydraulic motor can drive the turntable 4 to rotate, thereby driving the blade 6 to rotate a certain angle.

[0047] In some embodiments, the controller calculating the adjustment amount based on the initial distance and the real-time distance comprises:

[0048] The real-time distance includes a first real-time distance and a second real-time distance respectively detected by two groups of distance sensors 3, and the adjustment amount includes a first adjustment amount and a second adjustment amount:

[0049] The first adjustment amount = the first real-time distance - the initial distance;

[0050] The second adjustment amount = the second real-time distance - the initial distance;

[0051] When the result of the first adjustment amount and the second adjustment amount is greater than 0, it indicates that the traction frame 2 needs to be controlled to descend, and when the result of the first adjustment amount and the second adjustment amount is less than 0, it indicates that the traction frame 2 needs to be controlled to ascend.

[0052] Through the above adjustment method, when encountering a pothole and causing the blade 6 to drop, the blade 6 can be controlled to rise by the corresponding adjustment amount calculated. When encountering a bump and causing the blade 6 to rise, the blade 6 can be controlled to fall by the corresponding adjustment amount calculated.

[0053] In some earthwork operations, there may be more stones in the earth, and some of the stones are larger. If the stones directly contact the blade 6, it will not only produce greater resistance but also affect the operation effect. In order to solve this problem, in some embodiments, a filter part is also provided on the frame body 1, and the filter part is used to filter the stones to avoid a large amount of stones from accumulating at the blade 6.

[0054] like Figure 2-Figure 3 As shown, optionally, the filtering part includes a first connecting rod 12 arranged at the bottom of the frame body 1, two groups of frames 13 are provided on the first connecting rod 12, multiple groups of rotating rollers 14 are arranged side by side on the frame 13, and the two groups of rotating rollers 14 are arranged in an arrow shape. An arc frame 15 is provided on the frame 13, and the arc frame 15 is fixed to the frame body 1 through a second connecting rod 16.

[0055] During operation, as the front frame moves forward, larger stones in the earthwork will come into contact with the rotating rollers 14. Since the two groups of rotating rollers 14 are arranged in an arrow shape, the stones will move to both sides and be discharged outside the moving path of the shovel blade 6, thereby preventing larger stones from directly contacting the shovel blade 6 and preventing greater resistance caused by stones. At the same time, it also prevents the influence of larger stones on the leveling operation process.

[0056] like Figure 2-Figure 3 As shown, in some embodiments, the first connecting rod 12 is hollow, and one end of the two groups of frames 13 are respectively fixedly connected with a third connecting rod 17 and a fourth connecting rod 18, the third connecting rod 17 passes through the fourth connecting rod 18, and the fourth connecting rod 18 passes through the first connecting rod 12, the third connecting rod 17 and the fourth connecting rod 18 are both rotatably connected to the inside of the first connecting rod 12, the third connecting rod 17 and the fourth connecting rod 18 are transmission-connected with a driving part, the middle part of the frame 13 is slidingly connected to the arc frame 15, the height of one frame 13 is greater than the height of the other frame 13, and the two groups of frames 13 can be driven to rotate to different angles through the driving part, and when the two groups of frames 13 are fitted, the rotating rollers 14 in the two groups of frames 13 are staggered and distributed to filter smaller stones.

[0057] In the process of filtering stones, some smaller stones may move to the shovel 6 through the gap between the two rotating rollers 14. When smaller stones gather at the shovel 6, it will also cause an impact. At this time, when there is no earth in front of the filter part or there is no earth in front of the filter part but there is earth some distance behind it, the third connecting rod 17 or the fourth connecting rod 18 can be controlled to rotate by the driving part. For example, the driving part controls the third connecting rod 17 to rotate clockwise, thereby driving the frame 13 under the third connecting rod 17 to rotate clockwise until the two groups of frames 13 are fitted together. The rotating rollers 14 in the two groups of frames 13 are staggered. At this time, the distance between the two conveying rollers can be shortened. Then the driving part continues to drive the two groups of frames 13 to rotate clockwise at the same time through the third connecting rod 17 and the fourth connecting rod 18 to pass through the earth in front of the shovel 6, and filter out the smaller ones, thus avoiding the adverse effects caused by the large number of smaller stones gathering at the shovel 6.

[0058] like Figure 2 As shown, in some embodiments, when the two groups of the frames 13 after bonding need to filter smaller stones in a clockwise or counterclockwise direction, the turntable 4 drives the blade 6 to rotate clockwise or counterclockwise by a predetermined angle to push the soil on one side of the blade 6 toward the frame 13.

[0059] When the rotary table 4 drives the shovel blade 6 to rotate clockwise or counterclockwise at a predetermined angle, the shovel blade 6 can push the earth toward the two sets of frames 13, so as to better filter the earth in front of the shovel blade 6.

[0060] like Figure 3 As shown, in some embodiments, the driving unit includes a second hydraulic motor 19 and a third hydraulic motor 20, the second hydraulic motor 19 is transmission-connected to a first gear 21, the first gear 21 is meshed with a second gear 22, the second gear 22 is fixedly mounted on the third connecting rod 17, the third hydraulic motor 20 is transmission-connected to a third gear 23, the third gear 23 is meshed with a fourth gear 24, and the fourth gear 24 is fixedly mounted on the fourth connecting rod 18.

[0061] During operation, the second hydraulic motor 19 drives the first gear 21 to rotate, the first gear 21 drives the second gear 22 to rotate, the second gear 22 drives the third connecting rod 17 to rotate, thereby driving the frame 13 below the third connecting rod 17 to rotate, the third hydraulic motor 20 drives the third gear 23 to rotate, the third gear 23 drives the fourth gear 24 to rotate, the fourth gear 24 drives the fourth connecting rod 18 to rotate, thereby driving the frame 13 below the fourth connecting rod 18 to rotate.

[0062] like Figure 4As shown, in order to further implement the present invention, the present invention also provides an electric grader, comprising:

[0063] As in the above-mentioned multi-angle adjustable grader front frame, a set of front wheels 25 is provided on the front frame;

[0064] The rear frame 26 is fixedly arranged on one side of the front frame. A cab 27 and a power unit of the grader are arranged on the rear frame 26 . Two sets of rear wheels 28 are arranged at the bottom of the rear frame 26 .

[0065] When the front wheel 25 or the rear wheel 28 encounters a pothole or bump on the road surface during driving, the electric grader can timely adjust the corresponding height of the blade 6 so that the blade 6 can better level the ground.

[0066] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the above aspects of the present invention, which are not provided in detail for the sake of simplicity.

[0067] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, 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. A multi-angle adjustable front frame of a motor grader, comprising a frame body (1), characterized in that: Also includes: A traction frame (2), an adjustment unit, a distance sensor (3) and a controller, wherein: The traction frame (2) is arranged below the frame body (1), one end of the traction frame (2) is hinged to the front side of the frame body (1), the bottom of the traction frame (2) is rotatably connected to a turntable (4), the turntable (4) is provided with a mounting frame (5), and the mounting frame (5) is used to mount a blade (6) of the grader; The adjusting portion is in driving connection with the traction frame (2) and is used to adjust the position of the scraper (6) by adjusting the position of the traction frame (2); The distance sensors (3) are provided in two groups, and the two groups of distance sensors (3) are respectively arranged on both sides of the mounting frame (5) and are located directly above the back side of the scraper (6); The controller is electrically connected to the adjustment unit and the distance sensor (3); The initial heights of the two sets of distance sensors (3) are set, and the distances between the two sets of distance sensors (3) and the road surface measured are set as two initial distances. When potholes or bumps appear on the road surface, the two sets of distance sensors (3) detect the real-time distances, and the controller calculates the adjustment amount based on the initial distance and the real-time distance, and controls the adjustment unit to drive the blade (6) to adjust the adjustment amount through the traction frame (2); The frame body (1) is also provided with a filter part, which is used to filter stones to prevent a large amount of stones from being accumulated at the blade (6); The filter unit comprises a first connecting rod (12) arranged at the bottom of the frame body (1), two groups of frames (13) are arranged on the first connecting rod (12), a plurality of groups of rotating rollers (14) are arranged side by side on the frames (13), the two groups of rotating rollers (14) are arranged in an arrow shape, an arc frame (15) is provided on the frame (13), and the arc frame (15) is fixed to the frame body (1) via a second connecting rod (16); The first connecting rod (12) is hollow, and one end of the two groups of frames (13) is fixedly connected with a third connecting rod (17) and a fourth connecting rod (18), respectively. The third connecting rod (17) passes through the fourth connecting rod (18), and the fourth connecting rod (18) passes through the first connecting rod (12). The third connecting rod (17) and the fourth connecting rod (18) are both rotatably connected inside the first connecting rod (12). The third connecting rod (17) and the fourth connecting rod (18) are transmission-connected with a driving part. The middle part of the frame (13) is slidably connected to the arc frame (15). The height of one frame (13) is greater than that of the other frame (13). The two groups of frames (13) can be driven to rotate to different angles by the driving part. When the two groups of frames (13) are fitted together, the rotating rollers (14) in the two groups of frames (13) are staggered and distributed to filter smaller stones.

2. The multi-angle adjustable front frame of a motor grader according to claim 1, characterized in that: The adjustment part comprises two groups of connecting frames (7) symmetrically arranged on both sides of the frame body (1), and the two groups of connecting frames (7) are both hinged with a first mounting sleeve (8), and a first hydraulic cylinder (9) is hinged in the first mounting sleeve (8), and the telescopic rod of the first hydraulic cylinder (9) is hinged on the traction frame (2); one group of the connecting frames (7) is hinged with a second mounting sleeve (10), and a second hydraulic cylinder (11) is hinged in the second mounting sleeve (10), and the telescopic rod of the second hydraulic cylinder (11) is hinged on one end of the traction frame (2), and the second hydraulic cylinder (11) is tilted. The traction frame (2) is provided with a first hydraulic motor, and the first hydraulic motor is drivingly connected to the turntable (4).

3. The multi-angle adjustable front frame of a motor grader according to claim 1, characterized in that: The controller calculates the adjustment amount based on the initial distance and the real-time distance, comprising: The real-time distance includes a first real-time distance and a second real-time distance respectively detected by two groups of distance sensors (3), and the adjustment amount includes a first adjustment amount and a second adjustment amount: The first adjustment amount = the first real-time distance - the initial distance; The second adjustment amount = the second real-time distance - the initial distance; When the result of the first adjustment amount and the second adjustment amount is greater than 0, it indicates that the traction frame (2) needs to be controlled to descend, and when the result of the first adjustment amount and the second adjustment amount is less than 0, it indicates that the traction frame (2) needs to be controlled to ascend.

4. The multi-angle adjustable front frame of a motor grader according to claim 1, characterized in that: When the two groups of the frames (13) that have been joined together need to filter smaller stones in a clockwise or counterclockwise direction, the turntable (4) drives the shovel blade (6) to rotate clockwise or counterclockwise to a predetermined angle, pushing the soil on one side of the shovel blade (6) toward the frame (13).

5. The multi-angle adjustable front frame of a motor grader according to claim 1, characterized in that: The driving unit comprises a second hydraulic motor (19) and a third hydraulic motor (20); the second hydraulic motor (19) is connected to a first gear (21) in a transmission manner; the first gear (21) is meshed with a second gear (22); the second gear (22) is fixedly sleeved on the third connecting rod (17); the third hydraulic motor (20) is connected to a third gear (23); the third gear (23) is meshed with a fourth gear (24); the fourth gear (24) is fixedly sleeved on the fourth connecting rod (18).

6. An electric grader, characterized in that: include: A multi-angle adjustable motor grader front frame as claimed in any one of claims 1 to 5, wherein the front frame is provided with a set of front wheels (25); A rear frame (26) is fixedly arranged on one side of the front frame, a cab (27) and a power unit of the grader are arranged on the rear frame (26), and two sets of rear wheels (28) are arranged at the bottom of the rear frame (26).

Images