Farmland operation machine tool resistance test bench

Abstract

The invention provides a farmland operation machine tool resistance test bench, which comprises a machine bench, a crawler belt conveyor and a mounting seat are arranged on the machine bench, a main shaft which is rotatably mounted and a driving assembly for driving the main shaft to rotate are arranged on the mounting seat, and a supporting arm is rotatably arranged on the main shaft. The supporting arm is provided with a coulter installed through an installation mechanism, the installation mechanism is provided with a test assembly connected with the coulter, the installation seat is provided with a power switching unit connected with the main shaft and the supporting arm, and rotation of the main shaft is selectively converted into driving of the supporting arm to rotate or driving of the coulter to rotate through the power switching unit. The test bench can control the coulter to rotate and can also control the supporting arm to swing, the acting force borne by the coulter can be conveniently and rapidly tested when the coulter is tested at different angles, and the diversity and reliability of data are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of resistance testing, and in particular to a resistance testing bench for farmland operation machinery. Background Art

[0002] In traditional agricultural production, plow blades, as key tillage tools, undertake important tasks such as cutting soil and turning over soil layers. However, in actual use, traditional plow blades are often prone to breakage, excessive wear and other problems during plowing or tilling the fields due to factors such as material, design or manufacturing process. This not only affects tillage efficiency, but also increases farmers' production costs.

[0003] The performance of farmland operation equipment directly affects the efficiency and quality of agricultural production. As the key component of farmland operation equipment, the plowshare's resistance and other force parameters at different operating angles are accurately tested, which is of great significance for optimizing design and improving operation results.

[0004] For example, the Chinese invention patent with publication number CN110220687B provides a field agricultural machinery testing platform. By setting a fixed soil trough field, a coupling trolley is mounted on the walking trolley, and the tested machine or small complete machine is mounted through the three-point suspension device at the rear end of the coupling trolley, thereby more realistically simulating the state of a tractor equipped with a machine driving in the field, towing and driving the tested machine to move along the field soil trough at the same time, and transmitting the obtained data to the control component through the force testing component and the imaging component for integrated processing, thereby combining the three major functions of walking, testing and data processing into one, making the test effect more accurate and the operating range wider.

[0005] However, existing farm equipment resistance test benches on the market have numerous limitations. Most test benches have fixed structures, making it difficult to flexibly adjust the coulter mounting angle. This makes it difficult to fully simulate the complex and variable working angles of the coulter in actual farmland operations. This makes it difficult to measure the forces acting on the coulter when testing it at different angles, and thus fails to meet the demands of modern agriculture for efficient and accurate testing of farm equipment. Therefore, a farm equipment resistance test bench was proposed to address these technical issues. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the present invention proposes a resistance test bench for farmland operation machinery to solve the technical problem proposed in the above background technology that the existing test bench is inconvenient to test the forces acting on the coulter at different angles when in use.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a resistance test bench for farmland operation machinery, comprising: The machine is equipped with a crawler conveyor; A mounting base, fixedly mounted on the machine platform, wherein a rotatably mounted main shaft and a driving assembly for driving the main shaft to rotate are provided on the mounting base; a support arm rotatably arranged on the main shaft along its axis, wherein the support arm is provided with a plow mounted by a mounting mechanism; a test assembly, disposed on the mounting mechanism and connected to the coulter to test the force applied to the coulter; and A power switching unit is provided on the mounting seat and is connected to the main shaft and the support arm so as to selectively convert the rotation of the main shaft into driving the support arm to rotate or driving the plow to rotate.

[0008] In a preferred embodiment, a receiving shell is further provided at the bottom of the machine, and a spraying device is provided at the top of the machine.

[0009] In a preferred embodiment, the drive assembly includes: A driving cylinder is fixedly mounted on the mounting base, wherein a rack is provided at the telescopic end of the driving cylinder; and The gear is fixed on the main shaft and meshes with the rack.

[0010] In a preferred embodiment, the power switching unit includes: a first synchronous wheel, fixedly arranged on the main shaft; a second synchronous wheel rotatably disposed along its axis at the end of the support arm and connected to the plow, and the second synchronous wheel is connected to the first synchronous wheel via a synchronous belt; and A fixing mechanism is provided on the mounting seat to selectively fix or release the positions of the main shaft and the support arm.

[0011] In a preferred embodiment, the fixing mechanism includes: a first gear disc slidably mounted on the main shaft; a second toothed disc, fixedly disposed at the bottom of the support arm, wherein the first toothed disc is capable of engaging with the second toothed disc after being raised; A drive frame is movably mounted on the mounting base, and the second gear disc is rotatably mounted in the drive frame; and The lifting assembly is arranged on the mounting seat to selectively drive the driving frame to move up and down.

[0012] In a preferred embodiment, the lifting assembly includes: A sliding frame is fixedly arranged on the driving frame; A rocker, one end of which is hinged to the mounting base and the other end of which is connected to the mounting base via a tension spring; and The driving column is arranged on the rocker and is slidably clamped in the sliding frame.

[0013] In a preferred embodiment, a mounting column is provided on the drive frame, a friction ring is provided on the sliding sleeve of the mounting column, the friction ring abuts against the surface of the second gear disk, a stop block is provided at the end of the mounting column, and an elastic member is provided between the stop block and the friction ring.

[0014] In a preferred embodiment, the mounting mechanism includes: a carrier frame, connected to the second synchronous wheel in a liftable manner; a telescopic assembly, disposed on the support arm and connected to the carrier to drive the carrier to move up and down; and A walking platform is slidably arranged on the bearing frame, a connecting rod is arranged on the plow blade, a connecting frame is arranged on the connecting rod, and the connecting frame is hinged on the walking platform.

[0015] In a preferred embodiment, the telescopic assembly includes: A telescopic motor is fixedly mounted on the end of the support arm, wherein a C-shaped frame is provided on the end of the telescopic motor; and The lifting rod is slidably arranged on the second synchronous wheel along its axis, one end of which is connected to the supporting frame, and the other end of which is provided with a chuck, and the chuck is rotatably arranged in the C-shaped frame.

[0016] In a preferred embodiment, the test component includes: A fixing frame, fixedly arranged on the carrying frame and located on one side of the walking platform; A first force sensor is provided between the fixing frame and the walking platform; and The second force sensor is arranged on the walking platform and connected to the connecting frame. The testing direction of the second force sensor is perpendicular to that of the first force sensor.

[0017] Compared with the prior art, the present invention has the following beneficial effects: When the test bench is in use, soil blocks are placed on the crawler conveyor, and the soil blocks are transported by controlling the crawler conveyor to start. When the soil blocks pass through the coulter, they generate relative motion with the coulter, thereby applying thrust to the coulter, and the force applied to the coulter can be tested by the test assembly. In addition, the main shaft can be driven to rotate by the drive assembly. During the rotation of the main shaft, the coulter can be controlled by the power switching unit to rotate a certain angle or rotate continuously, so as to simulate the actual plowing working condition according to the coulter used in a fixed use or the coulter of a rotatable plow. The rotation of the main shaft can also be converted into the rotation of the driving support arm by the power switching unit, thereby driving the overall movement of the coulter, so that the coulter and the test assembly are deflected by a certain angle along the axis of the main shaft, so as to simulate the use state of the coulter when the plowing machine is in non-linear motion. This makes it convenient and quick to test the forces applied to the coulter when testing at different angles, thereby improving the diversity and reliability of the data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the specific embodiments. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0019] Figure 1 A resistance test bench for farmland operation machinery provided by the present invention; Figure 2 This is a schematic diagram of the structure of the mounting seat and the parts above it in a resistance test bench for farmland work tools of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the mounting seat and the parts above it in a resistance test bench for farmland work tools of the present invention. Figure 2 ; Figure 4 for Figure 3 A magnified schematic diagram of area A in the middle; Figure 5 This is a schematic structural diagram of a lifting assembly in a resistance test bench for farmland work equipment according to the present invention; Figure 6 This is a schematic structural diagram of a load-bearing frame in a resistance test bench for farmland operation equipment according to the present invention; Figure 7 for Figure 6 Schematic diagram of the enlarged area B.

[0020] Reference numerals: 1. Machine platform; 2. Crawler conveyor; 3. Receiver shell; 4. Spraying equipment; 5. Mounting seat; 6. Driving cylinder; 7. Rack; 8. Spindle; 9. Gear; 10. First synchronous wheel; 11. Synchronous belt; 12. Support arm; 13. Second gear disc; 14. First gear disc; 15. Driving frame; 16. Sliding frame; 17. Rocker; 18. Driving column; 19. Mounting column; 20. Stopper; 21. Elastic member; 22. Friction ring; 23. Telescopic motor; 24. C-frame; 25. Second synchronous wheel; 26. Lifting rod; 27. Chuck; 28. Carrying frame; 29. ​​Walking platform; 30. Fixed frame; 31. First force sensor; 32. Connecting frame; 33. Connecting rod; 34. Plow; 35. Second force sensor. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Those skilled in the art can make some non-essential improvements and adjustments to the present invention based on the above application content.

[0022] Example: like Figure 1 、 2 As shown, the present invention provides a resistance test bench for farmland operation machinery, including a machine platform 1, a crawler conveyor 2 is provided on the machine platform 1, a receiving shell 3 is also provided at the bottom of the machine platform 1, a spraying device 4 is provided on the top of the machine platform 1, and a mounting seat 5 is also fixedly provided on the machine platform 1, a rotatably mounted main shaft 8 is provided on the mounting seat 5, a support arm 12 is rotatably provided on the main shaft 8, and a plow 34 is provided on the support arm 12.

[0023] During use, soil clods can be placed on the crawler conveyor 2, or a receiving frame can be installed on the crawler conveyor 2, and the soil clods can be placed in the receiving frame. The crawler conveyor 2 controls the movement of the receiving frame to drive the soil clods. A plow 34 is also installed, and the movement of the crawler conveyor is controlled to drive the soil clods, so that the soil clods and the plow 34 move relative to each other, simulating a real plowing environment. The soil clods can also be sprayed with a spray device 4 to simulate the effect of soil plowing at a certain degree of moisture, which facilitates research by changing test variables. During the test process, the receiving shell 3 can also be used to receive water or loose soil.

[0024] like Figures 2 to 4As shown, in this embodiment, a drive assembly for driving the main shaft 8 is provided on the mounting base 5. The drive assembly includes a drive cylinder 6 fixedly mounted on the mounting base 5. A rack 7 is provided at the retractable end of the drive cylinder 6. A gear 9 is fixedly mounted on the main shaft 8, and the gear 9 meshes with the rack 7. The gear 9 can be controlled to slide the electric rack 7 by controlling the extension and retraction of the drive cylinder 6, thereby driving the main shaft 8 to rotate through the cooperation of the rack 7 and the gear 9.

[0025] like Figures 2 to 4 As shown, in this embodiment, the mounting base 5 is provided with a power switching unit connected to the main shaft 8 and the support arm 12. The power switching unit selectively converts the rotation of the main shaft 8 into driving the rotation of the support arm 12 or the rotation of the coulter 34. The power switching unit includes a first synchronous wheel 10 fixedly provided on the main shaft 8, and a second synchronous wheel 25 is provided at the end of the support arm 12 so as to be rotatable along its axis. The second synchronous wheel 25 is connected to the coulter 34, and the second synchronous wheel 25 is connected to the first synchronous wheel 10 via a synchronous belt 11.

[0026] In the initial state, the position of the support arm 12 is fixed, and the first synchronous wheel 10 can be driven to rotate by the main shaft 8. During the rotation, the first synchronous wheel 10 can drive the plow 34 to rotate through the cooperation of the synchronous belt 11 and the second synchronous wheel 25. When the plow 34 is used in a fixed manner, the angle between the plow 34 and the direction of soil movement can be adjusted. When the plow 34 is used in a rotating manner, the plow 34 can be controlled to rotate continuously to match more models of plows 34.

[0027] like Figures 2 to 4 As shown, in this embodiment, the power switching unit also includes a fixing mechanism provided on the mounting base 5, through which the position of the main shaft 8 and the support arm 12 can be selectively fixed or released. The fixing mechanism includes a first gear disc 14 slidably mounted on the main shaft 8, a second gear disc 13 fixedly provided at the bottom of the support arm 12, and the first gear disc 14 can engage with the second gear disc 13 after being raised. A drive frame 15 is provided on the mounting base 5 so as to be liftable, and the first gear disc 14 is rotatably provided in the drive frame 15. The mounting base 5 is also provided with a lifting assembly, through which the lifting of the drive frame 15 can be selectively controlled. The lifting assembly includes a slide frame 16 fixedly provided on the drive frame 15, a rocker 17 is hinged on the mounting base 5, and the other end of the rocker 17 is connected to the mounting base 5 by a tension spring, and a drive column 18 is provided on the rocker 17, and the drive column 18 is slidably clamped in the slide frame 16.

[0028] In the initial state, the first gear disc 14 and the second gear disc 13 are separated, and the support arm 12 is also fixed. During the rotation of the main shaft 8, only the second synchronous wheel 25 can be controlled to rotate. A mounting post 19 is provided on the drive frame 15. A friction ring 22 is slidingly sleeved on the mounting post 19. The friction ring 22 abuts the surface of the second gear disc 13. A stopper 20 is provided at the end of the mounting post 19. An elastic member 21 is provided between the stopper 20 and the friction ring 22. The rocker 17 is pulled downward by a tension spring, thereby driving the stopper 20 downward and compressing the elastic member 21. The elastic member 21 applies a downward thrust to the friction ring 22, exerting a greater friction force on the second gear disc 13 to fix it, thereby preventing the support arm 12 from rotating when subjected to external forces. The rocker 17 can be lifted upward to drive the drive column 18 to move. During the movement, the drive column 18 drives the first gear plate 14 to rise by cooperating with the slide frame 16 until the first gear plate 14 is engaged with the second gear plate 13. The rotation of the main shaft 8 can be transmitted to the support arm 12. At the same time, the stop block 20 moves upward and the elastic member 21 relaxes, reducing the friction between the friction ring 22 and the second gear plate 13, thereby releasing the position fixation of the support arm 12. The main shaft 8 can drive the support arm 12 to rotate during the rotation process to adjust the position of the plow 34.

[0029] like Figure 2 、 5 As shown in Figures 6 and 7, in this embodiment, the plow 34 is mounted on the support arm 12 via a mounting mechanism. The mounting mechanism includes a carrier frame 28 that is liftably connected to the second synchronous wheel 25. The support arm 12 is provided with a telescopic assembly connected to the carrier frame 28. The carrier frame 28 is driven to rise and fall by the telescopic assembly. A walking platform 29 is slidably provided on the carrier frame 28. The plow 34 is provided with a connecting rod 33, and a connecting frame 32 is provided on the connecting rod 33. The connecting frame 32 is hinged to the walking platform 29. The telescopic assembly includes a telescopic motor 23 fixedly provided at the end of the support arm 12. A C-shaped frame 24 is provided at the end of the telescopic motor 23. A lifting rod 26 is slidably provided along the axis of the second synchronous wheel 25. One end of the lifting rod 26 is connected to the carrier frame 28, and the other end is provided with a chuck 27. The chuck 27 is rotatably provided in the C-shaped frame 24.

[0030] During the rotation, the second synchronous wheel 25 can drive the lifting rod 26 to rotate, and then drive the carrier frame 28 to rotate, so that the plow 34 can rotate. The telescopic motor 23 can be controlled to start and drive the C-frame 24 to rise and fall. During the lifting process, the C-frame 24 can drive the lifting rod 26 to rise and fall by cooperating with the chuck 27 to adjust the height of the plow 34, thereby improving the convenience of adjusting the position of the plow 34.

[0031] like Figure 6 、 7As shown, in this embodiment, a test component connected to the plow 34 is provided on the mounting mechanism, and the force on the plow 34 is tested by the test component. The test component includes a fixing frame 30 fixedly provided on the carrier frame 28, and the fixing frame 30 is located on one side of the walking platform 29. A first force sensor 31 is provided between the fixing frame 30 and the walking platform 29, and a second force sensor 35 connected to the connecting frame 32 is provided on the walking platform 29. The test direction of the second force sensor 35 is perpendicular to the first force sensor 31.

[0032] When the coulter 34 is subjected to a force parallel to the direction of soil movement, the connecting rod 33 drives the connecting frame 32 to rotate, and the first force sensor 31 is used to test the force applied to the coulter 34 in one direction. When the force applied to the coulter 34 is perpendicular to the direction of soil movement, the walking platform 29 is driven to slide on the support frame 28, and the force applied to the coulter 34 is tested by the second force sensor 35, thereby analyzing the force applied to the coulter 34. The first force sensor 31 and the second force sensor 35 can be selected as tension sensors or pressure sensors according to the installation position and the adaptability of the force direction. The display of sensor data is a common technical means used by those skilled in the art and will not be elaborated here.

[0033] Specific usage and beneficial effects of the present invention: When the test bench is in use, a soil block is placed on the crawler conveyor 2, and the crawler conveyor 2 is controlled to start and transport the soil block. When the soil block passes through the coulter 34, it generates relative motion with the coulter 34, thereby applying thrust to the coulter 34, and the force applied to the coulter 34 can be tested by the test assembly. In addition, the main shaft 8 can be driven to rotate by the drive assembly. During the rotation of the main shaft 8, the coulter 34 can be controlled by the power switching unit to rotate a certain angle or rotate continuously, so as to simulate the actual plowing working condition according to the coulter 34 used in a fixed or rotatable plow. The power switching unit can also convert the rotation of the main shaft 8 into the rotation of the driving support arm 12, thereby driving the entire movement of the coulter 34, so that the coulter 34 and the test assembly as a whole deflect by a certain angle along the axis of the main shaft 8 to simulate the use state of the coulter 34 when the plow machine is in non-linear motion. This facilitates and quickly tests the forces applied to the coulter 34 when tested at different angles, thereby improving the diversity and reliability of the data.

[0034] The basic principles, main features, and advantages of the present invention are shown and described above. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above. Modifications and improvements may be made based on the present invention, as will be apparent to those skilled in the art. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to fall within the scope of protection claimed in the present invention.

Claims

1. A resistance test bench for farmland operation machinery, characterized in that: Includes: A machine (1) is provided with a crawler conveyor (2); A mounting seat (5) is fixedly mounted on the machine platform (1), and a rotatably mounted main shaft (8) and a driving assembly for driving the main shaft (8) to rotate are provided on the mounting seat (5); A support arm (12) is rotatably arranged on the main shaft (8) along its axis, and a plow (34) is provided on the support arm (12) and is installed via a mounting mechanism; A test assembly is provided on the mounting mechanism and is connected to the plow (34) to test the force applied to the plow (34); and A power switching unit is provided on the mounting seat (5) and is connected to the main shaft (8) and the support arm (12) so as to selectively convert the rotation of the main shaft (8) into driving the support arm (12) to rotate or driving the plow (34) to rotate.

2. The resistance test bench for farmland operation equipment according to claim 1, characterized in that: A receiving shell (3) is further provided at the bottom of the machine (1), and a spraying device (4) is provided at the top of the machine (1).

3. The resistance test bench for farmland operation equipment according to claim 1, characterized in that: The drive assembly includes: A driving cylinder (6) is fixedly mounted on the mounting base (5), and a rack (7) is provided at the telescopic end of the driving cylinder (6); and A gear (9) is fixedly arranged on the main shaft (8) and meshes with the rack (7).

4. The resistance test bench for farmland operation machinery according to claim 1, characterized in that: The power switching unit includes: A first synchronous wheel (10) is fixedly arranged on the main shaft (8); A second synchronous wheel (25) is rotatably arranged along its axis at the end of the support arm (12) and connected to the plow (34), and the second synchronous wheel (25) is connected to the first synchronous wheel (10) via a synchronous belt (11); and A fixing mechanism is provided on the mounting seat (5) to selectively fix or release the positions of the main shaft (8) and the support arm (12).

5. The resistance test bench for farmland operation machinery according to claim 4, characterized in that: The fixing mechanism includes: A first toothed disc (14) is slidably mounted on the main shaft (8); A second toothed disc (13) is fixedly arranged at the bottom of the support arm (12), and the first toothed disc (14) is capable of engaging with the second toothed disc (13) after rising; A drive frame (15) is movably mounted on the mounting seat (5), and the second toothed disc (13) is rotatably mounted within the drive frame (15); and A lifting assembly is arranged on the mounting seat (5) to selectively drive the driving frame (15) to move up and down.

6. The resistance test bench for farmland operation equipment according to claim 5, characterized in that: The lifting assembly includes: A sliding frame (16) is fixedly mounted on the driving frame (15); A rocker (17), one end of which is hinged to the mounting seat (5), and the other end of which is connected to the mounting seat (5) via a tension spring; and The driving column (18) is arranged on the rocker (17) and is slidably mounted in the sliding frame (16).

7. The resistance test bench for farmland operation equipment according to claim 5, characterized in that: The drive frame (15) is provided with a mounting column (19), a sliding sleeve on the mounting column (19) is provided with a friction ring (22), the friction ring (22) abuts against the surface of the second toothed disc (13), a stopper (20) is provided at the end of the mounting column (19), and an elastic member (21) is provided between the stopper (20) and the friction ring (22).

8. The resistance test bench for farmland operation machinery according to claim 4, characterized in that: The mounting mechanism includes: A carrier frame (28) connected to the second synchronous wheel (25) in a liftable manner; A telescopic assembly is provided on the support arm (12) and is connected to the carrier (28) to drive the carrier (28) to rise and fall; and A walking platform (29) is slidably arranged on the carrier frame (28); a connecting rod (33) is provided on the plow (34); a connecting frame (32) is provided on the connecting rod (33); and the connecting frame (32) is hinged on the walking platform (29).

9. The resistance test bench for farmland operation machinery according to claim 8, characterized in that: The telescopic assembly includes: A telescopic motor (23) is fixedly arranged at the end of the support arm (12), and a C-shaped frame (24) is provided at the end of the telescopic motor (23); and A lifting rod (26) is slidably arranged on the second synchronous wheel (25) along its axis, one end of which is connected to the carrier frame (28) and the other end of which is provided with a chuck (27), and the chuck (27) is rotatably arranged in the C-shaped frame (24).

10. The resistance test bench for farmland operation machinery according to claim 8, characterized in that: The test components include: A fixed frame (30) is fixedly mounted on the carrier frame (28) and is located on one side of the walking platform (29); a first force sensor (31) disposed between the fixing frame (30) and the walking platform (29); and A second force sensor (35) is provided on the walking platform (29) and connected to the connecting frame (32); a testing direction of the second force sensor (35) is perpendicular to that of the first force sensor (31).

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