A disc cutter testing device and a cutting parameter adjusting method

Abstract

A disc cutter test device, comprising a suspension frame assembly and a cutting component; the suspension frame assembly comprises a suspension frame body, a first lower suspension pin (11), an upper suspension pin (12), a power input shaft (13), a torque power sensor (14), a second lower suspension pin (15), a floor support (16), a first tower wheel (17) and a first tensioning wheel (18); the cutting component comprises a synchronous belt pressing pulley (3), a center distance adjusting assembly (4), a lower mounting plate (5), a fixed cutter head assembly (6), a movable cutter head assembly (615), a slide palm welding assembly (7), a second tensioning wheel (8) and a gear box assembly; the cutting parameters of the application change within a certain range, meet the debugging operation requirements before determining the parameters of the disc cutter product, and a group of cutting parameters with low loss, low energy consumption and high efficient operation effect can be explored according to the test results, which provides a theoretical basis for the product development of the disc cutter.

Description

Technical Field

[0001] This invention belongs to the field of forage harvesting technology, specifically relating to a disc cutter test device and a method for adjusting cutting parameters. Background Technology

[0002] The cutter is the core working component of a lawnmower, and its design parameters directly determine the cutting performance and work quality of the lawnmower. The disc cutter harvests forage stalks using a high-speed, unsupported cutting method. This involves using a high-speed rotating blade to directly cut the forage stalks. At the moment the blade contacts the stalk, the stalk reaches its shear stress limit, cutting the forage and leaving a stubble at the height of the contact point between the cutter and the stalk.

[0003] For disc cutters, the main operating parameters include: disc diameter D, disc rotation speed n, disc center distance s, disc tilt angle θ, number of blades N, blade length l, and blade torsion angle. These parameters are interconnected and influence each other. For example, if the ratio of operating speed v to disc rotation speed n is too small, the cutter will miss some cuts; if the ratio is too large, the overcut rate will be too high. If the product of disc rotation speed n and disc diameter is too low, the blade linear velocity will be too low, resulting in uneven cutting; if the product is too high, the blade linear velocity will be too high, increasing the leaf loss rate during forage harvesting.

[0004] Currently, most disc cutters adopt a bottom-drive structure, which relies on gear transmission below the cutter. The ground sliding plate is fitted and installed below the cutter gearbox, and its position cannot be changed relative to the cutter head. In other words, once the cutting parameters of the bottom-drive disc cutter are determined, parameters such as the disc diameter D, disc rotation speed n, and cutter head center distance s cannot be changed, making it impossible to test the various working parameters of the disc cutter.

[0005] Therefore, it is necessary to design a disc cutter test device. This device can easily adjust the cutting parameters to conduct field operation tests under different cutting parameters, verify the cutter prototype with actual field operation results, or use the test device to explore a set of reasonable cutting parameters so that the operation effect is low-damage, low-energy consumption and high-efficiency, which can save time and production costs for disc cutter product development. Summary of the Invention

[0006] The purpose of this invention is to provide a test device for a disc cutter and a method for adjusting cutting parameters. On this test device, various cutting parameters can be conveniently adjusted. By changing various cutting parameters, cutting operation tests can be conducted. Based on the test results, a set of cutting parameters with low loss, low energy consumption, and high efficiency can be explored, which can provide a theoretical basis for the product development of disc cutters.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] A disc-type cutter testing device, the device comprising a suspension frame assembly 1 and a cutting component;

[0009] Among them, the suspension frame assembly 1 is located on the far left of the whole machine and is attached to the tractor;

[0010] The suspension frame assembly 1 includes a suspension frame body, a first lower suspension pin 11, an upper suspension pin 12, a power input shaft 13, a torque power sensor 14, a second lower suspension pin 15, a ground support 16, a first tower wheel 17, and a first tension wheel 18;

[0011] The main body of the suspension frame is formed by fixing multiple square tubes and plates together. The upper suspension pin 12, the first lower suspension pin 11, and the second lower suspension pin 15 are set on the main body of the suspension frame. The first lower suspension pin 11 is located at the front right of the suspension body and is connected to the lower suspension point of the tractor. The second lower suspension pin 15 is suspended at the lower left of the main body of the suspension frame and is connected to another lower suspension point of the tractor. The suspension frame assembly 1 is hooked to the tractor through the first lower suspension pin 11 and the second lower suspension pin 15. The upper suspension pin 12 is connected to the rear suspension point of the tractor through the lead screw 19. The power input shaft 13 is installed in the center of the main body of the suspension frame.

[0012] The tractor PTO output shaft 110 is connected to the power input shaft 13. The power input shaft 13 is equipped with a torque power sensor 14 and a first tower wheel 17. The first tension wheel 18 is located behind the main body of the suspension frame. The first belt drive where the first tower wheel 17 is located is tensioned by the first tension wheel 18. The ground bracket 16 is located on the right side of the suspension frame assembly 1 and serves as a support.

[0013] The cutting components include a synchronous belt pressure pulley 3, a center distance adjustment assembly 4, a lower mounting plate 5, a fixed cutter head assembly 6, a movable cutter head assembly 615, a sliding welding assembly 7, a second tensioning pulley 8, and a gearbox assembly 9.

[0014] The center distance adjustment assembly 4 includes a bearing 41 with a slider seat, a first mounting plate 42, a second mounting plate 43, a nut 44, a lead screw 45, a handwheel 46, and a column 47;

[0015] Two pairs of columns 47 are fixedly connected to the top of the lower mounting plate 5. A crossbeam is fixedly connected to the top of each pair of columns 47 to form a pair of crossbeams. The two ends of the first mounting plate 42 and the second mounting plate 43 are fixed between the pair of crossbeams. The first mounting plate 42 and the second mounting plate 43 are arranged in parallel and with a gap.

[0016] A fixed cutter head assembly 6 and a movable cutter head assembly 615 are disposed between the first mounting plate 42 and the second mounting plate 43; the fixed cutter head assembly 6 is arranged close to the gearbox, and the movable cutter head assembly 615 is arranged away from the gearbox; the cutter head mounting shafts 66 of both the fixed cutter head assembly 6 and the movable cutter head assembly 615 are installed between the first mounting plate 42 and the second mounting plate 43.

[0017] A slider bearing 41 is installed in the middle of the cutter head mounting shaft 66 of the movable cutter head assembly 615. The two sides of the slider on the slider bearing 41 are respectively mounted on the side end faces of the first mounting plate 42 and the second mounting plate 43. One end of the lead screw 45 is connected to the slider bearing 41, and the other end is connected to the handwheel 46. The middle part of the lead screw 45 is fitted with a nut 44, which is fixed between the first mounting plate 42 and the second mounting plate 43 by bolts. By rotating the handwheel 46, the slider bearing 41 and the cutter head mounting shaft 66 of the movable cutter head assembly 615 can be displaced along the axial direction of the lead screw 45 to adjust the center distance of the cutter head.

[0018] The fixed cutter head assembly 6 has a fixed installation position, while the movable cutter head assembly 615 can be moved a certain distance away from the gearbox under the action of the center distance adjustment assembly 4.

[0019] The fixed cutter head assembly 6 includes a cutter head 61, a blade mounting bolt 62, a blade 63, a roller 64, a second belt drive driven pulley 65, a cutter head mounting shaft 66, a synchronous pulley 68, an upper square seat bearing 69, a bearing mounting screw 610, a roller mounting screw 611, a welding ring 613, and a lower square seat bearing 614.

[0020] The cutter head assembly of the fixed cutter head assembly has a cutter head mounting shaft 66 with a timing pulley 68, an upper square seat bearing 69, a second belt drive driven pulley 65, a roller 64, a cutter head 61 and a lower square seat bearing 614 installed from top to bottom.

[0021] The lower end of the cutter head mounting shaft 66 mates with the lower square seat bearing 614. The surface of the lower mounting plate 5 has through holes. The lower square seat bearing 614 is fixedly mounted on the through holes on the lower mounting plate 5 by four bearing mounting screws 610. A transverse elongated hole is provided in front of and in the middle of the two rows of through holes.

[0022] The roller 64 and the cutter head 61 are fixed together by roller mounting screws 611;

[0023] A pair of blades 63 are symmetrically mounted on the cutter head 61. They are connected to the shoulder of the blade mounting bolt 62 through their own through holes. The blades 63 can rotate freely around the shoulder of the blade mounting bolt 62, which meets the conditions for using the tool.

[0024] The movable cutter head assembly 615 includes a cutter head 61, a blade mounting bolt 62, a blade 63, a roller 64, a cutter head mounting shaft 66, a timing pulley 68, a bearing with a slider seat 41, a bearing mounting screw 610, a roller mounting screw 611, a welding ring 613, and a lower square seat bearing 614.

[0025] The cutting disc assembly of the movable cutter has a cutting disc mounting shaft 66 from top to bottom, on which a timing pulley 68, a bearing with a slider seat 41, a roller 64, a cutting disc 61, and a lower square seat bearing 614 are installed sequentially.

[0026] The lower end of the cutter head mounting shaft 66 mates with the lower square seat bearing 614. The surface of the lower mounting plate 5 has through holes. The lower square seat bearing 614 is fixedly mounted on the through holes of the lower mounting plate 5 by four bearing mounting screws 610. A bearing 41 with a slider seat is installed in the middle of the cutter head mounting shaft 66.

[0027] The roller 64 and the cutter head 61 are fixed together by roller mounting screws 611;

[0028] A pair of blades 63 are symmetrically mounted on the cutter head 61. They are connected to the shoulder of the blade mounting bolt 62 through their own through holes. The blades 63 can rotate freely around the shoulder of the blade mounting bolt 62, which meets the conditions for using the tool.

[0029] A timing belt 67 is fitted between the timing pulleys 68 of the fixed cutter head assembly 6 and the movable cutter head assembly 615; the timing belt pressure pulley 3 is installed on the first mounting plate 42 and the second mounting plate 43, and the rim of the pulley contacts the outer side of the timing belt 67 to play a tensioning role.

[0030] The sliding welding assembly 7 includes an upper welding plate 71, a lower base plate 72, and a rear side plate 73, wherein...

[0031] The tail ends of the upper welding plate 71 and the lower base plate 72 are connected by the rear side plate 73; the rear side plate 73 is provided with a through hole, and the upper welding plate 71 is provided with two longitudinal elongated holes. The upper welding plate 71 and the lower base plate 72 are at a certain angle. When fixedly installed, the upper welding plate 71 is in contact with the lower surface of the lower mounting plate 5, and the lower base plate 72 is in contact with the ground.

[0032] The two longitudinal elongated holes on the upper welding plate 71 and the transverse elongated holes on the lower mounting plate 5 are fixed by two mounting bolts 74; after changing the center distance and position of the cutter head, the relative position of the sliding welding assembly 7 with respect to the cutter head 61 and the lower mounting plate 5 is changed by moving the sliding welding assembly 7, so that the sliding welding assembly 7 is always located in front of the cutter head 61, and the length of the sliding welding assembly 7 extending out of the cutter head 61 can be changed.

[0033] The gearbox assembly 9 is installed on the far left of the lower mounting plate 5 and includes a second pulley 91, a first belt-driven driven pulley 92, a gearbox body 93, a gearbox output shaft 94, and a gearbox input shaft 95.

[0034] The gearbox body 93 is bolted to the rightmost side of the lower mounting plate 5, the second pulley 91 is mounted on the gearbox input shaft 95, and the first belt drive driven pulley 92 is mounted on the gearbox output shaft 94;

[0035] The first pulley 17 and the first belt drive driven pulley 92 are connected by a belt to form a first belt drive; the second pulley 91 and the second belt drive driven pulley 65 are connected by a second belt 81 to form a second belt drive; the power on the first pulley 17 is transmitted to the reversing transmission component of the second belt drive driven pulley 65 through the first belt drive and the second belt drive.

[0036] The second tensioning pulley 8 is located between the second pulley 91 and the second belt drive driven pulley 65, and it tensions the second belt 81.

[0037] The device also includes a lifting and folding assembly 2, which includes a lifting arm 21 and a hydraulic cylinder 22. It is located on the right side of the suspension frame assembly 1. The left side of the lifting arm 21 is hinged to the lower hinge point 24 of the frame lifting in the suspension frame assembly 1, and the rightmost and lowest end is hinged to the cutting frame mounting hinge point 26. The upper end of the hydraulic cylinder 22 is hinged to the upper hinge point 23 of the frame lifting in the suspension frame assembly 1, and the lower end is hinged to the lower hinge point 25 of the hydraulic cylinder in the middle of the lifting arm 21. This connection relationship constitutes the lifting and folding assembly 2.

[0038] A welded ring 613 is arranged below the cutter head 61 with the blade mounting bolt 62.

[0039] The length of the lead screw 19 can be adjusted by rotating the threaded tube in the middle of the lead screw 19, thereby adjusting the forward tilt angle of the cutter head 61.

[0040] The first chuck 17 is designed with three different reference diameters, and the second chuck 91 is designed with two different reference diameters. According to relevant standards, the two chucks are determined to be A-type grooved wheel structures, with a groove angle of 34°, a groove spacing of 15mm, and a reference width of 11mm. Each time a different reference diameter is selected, a different transmission ratio will be obtained. The two sets of chucks can obtain 6 different transmission ratios.

[0041] A method for adjusting cutting parameters using the aforementioned disc-type cutter testing device, the method comprising the following steps:

[0042] S1. Cutter head speed adjustment:

[0043] Based on the speed requirements in the cutting test, select a set of grooves with reference diameters from the first pulley 17 in the first belt drive and the second pulley 91 in the second belt drive, and install the transmission belt in the corresponding grooves of the first pulley 17 and the second pulley 91 to complete the power transmission of the cutter. After completing a set of cutting tests, place the transmission belt in other groove positions of the first pulley 17 and the second pulley 91 to adjust the speed of the cutter head.

[0044] S2. Changing cutter heads of different diameters:

[0045] S2.1 The first cutter head 61 is connected to the cutter head mounting shaft 66 of the fixed cutter cutter head assembly 6 by a flat key. The cutter head mounting shaft 66 is equipped with a synchronous belt pulley 68, an upper square seat bearing 69, a second belt drive driven pulley 65 and a roller 64 from top to bottom.

[0046] S2.2 The second cutter head 61 is connected to the cutter head mounting shaft 66 of the movable cutter head assembly 615 via a flat key. The cutter head mounting shaft 66 is equipped with a timing pulley 68, a bearing with a slider seat 41 and a roller 64 from top to bottom.

[0047] S2.3, the upper square seat bearing 69 and the slider seat bearing 41 are fixedly installed on the second mounting plate 43 and the first mounting plate 42. After each set of cutter discs has been tested, the second mounting plate 43 and the first mounting plate 42 can be removed, and the fixed cutter disc assembly 6 and the movable cutter disc assembly 615 can be taken out to replace the next set of cutter discs.

[0048] S3, Center Distance Adjustment:

[0049] S3.1, The bearing 41 with slider seat is installed in the middle part of the cutter head mounting shaft 66 of the movable cutter head assembly 615, and the two sides of the slider are respectively installed on the side end faces of the first mounting plate 42 and the second mounting plate 43.

[0050] S3.2 The right end of the lead screw 45 is connected to the bearing 41 with the slider seat, the left end is connected to the handwheel 46, and the middle part of the lead screw 45 is fitted with the nut 44.

[0051] S3.3 By rotating the handwheel 46, the cutter head mounting shaft 66 with the slider seat bearing 41 and the movable cutter head assembly 615 can be moved axially along the lead screw 45. Under the action of the lead screw 45, after the position of the slider seat bearing 41 is adjusted, the position of the cutter head mounting shaft 66 and the lower square seat bearing 614 will also change accordingly. At this time, the lower square seat bearing 614 is fixedly installed on the lower mounting plate 5 by bolts, thereby realizing the fixation of the upper and lower ends of the cutter head mounting shaft 66.

[0052] This allows for the adjustment of the center distance between the two cutter heads;

[0053] S4. Position adjustment of sliding welding component 7:

[0054] S4.1 In the sliding welding assembly 7, the two longitudinal elongated holes on the upper welding plate 71 and the transverse elongated holes on the lower mounting plate 5 are fixed by two grounding sliding plate mounting bolts 74, so the sliding welding assembly 7 can move relative to the blade 63 in the front, back and left and right.

[0055] S4.2 After moving, the grounding plate mounting bolt 74 is inserted into the intersection of the two elongated holes for fixed installation;

[0056] S4.3 Finally, fix the through hole on the rear side plate 73 to the bottom plate 72 with two grounding sliding plate mounting bolts 74, and it will be firmly fixed in a specific position;

[0057] S5. Adjustment of cutter head tilt angle θ:

[0058] S5.1 The forward tilt angle of the cutter head of the disc cutter test device is adjusted by the length of the lead screw 19. The disc cutter test device is attached to the rear three-point suspension device of the tractor. The lead screw 19 is connected to the upper suspension point and the tractor by the pin 12.

[0059] S5.2 By rotating the threaded tube in the middle of the lead screw 19 to adjust the length of the lead screw 19, the entire disc cutter test device will rotate forward or backward around the first lower suspension pin 11 and the second lower suspension pin 15, thereby realizing the adjustment of the forward tilt angle θ of the cutter head 61.

[0060] S6, Power Measurement of Cutting Operation on Test Bench

[0061] S6.1 Cutting power is an important indicator for evaluating disc cutters. The power of this invention comes from the PTO output shaft 110 of the tractor, which is connected to the power input shaft 13 of the output shaft test bench through the PTO transmission shaft.

[0062] S6.2 The power input shaft 13 and the torque power sensor 14 are connected by a keyway;

[0063] S6.3, the first tower wheel 17 is then mounted on the output shaft 13 of the torque power sensor 14;

[0064] S6.4 The cutting power of the test bench is measured in real time by the torque power sensor 14, which serves as an indicator of the cutting effect of the test bench.

[0065] In step S1, the first tractor wheel 17 is designed with three different reference diameters, and the second tractor wheel 91 is designed with two different reference diameters, thereby obtaining six different transmission ratios. Combined with the fact that the tractor PTO output shaft 110 has two speeds of 540 r / min and 720 r / min, 12 speed options can be achieved.

[0066] In step S1, the reference diameters of the first pulley 17 are designed to be 160, 132, and 100 mm, respectively, and the reference diameters of the second pulley 91 are designed to be 150 and 118 mm, respectively. This gives the first belt drive three transmission ratios to choose from: 1.6, 1.32, and 1; and the second belt drive is set with two transmission ratios: 1.875 and 1.475. Thus, the cutter head speed can have a total of 12 speed options within the range of 2025 to 4320 r / min.

[0067] In step S2, the length of the second mounting plate 43 and the first mounting plate 42 is 1450mm. For cutter heads 61 with a diameter between 300 and 500mm, they can be installed on the test bench.

[0068] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0069] 1. In this invention, the disc cutter allows for adjustment and replacement of the disc diameter, disc center distance, disc rotation speed, disc tilt angle, and different blade specifications, facilitating testing of the disc cutter under various cutting parameters. This invention enables disc replacement within a diameter range of 300-500mm; the disc center distance is adjusted using the center distance adjustment component 4, and a special structural design allows for adjustment of the position of the sliding welding component 7 relative to the disc; the disc tilt angle is adjusted using the length of the lead screw 19. This invention allows for cutting test experiments by changing various cutting parameters. Based on the test results, a set of cutting parameters with low damage, low energy consumption, and high efficiency can be developed, providing a theoretical basis for the product development of disc cutters.

[0070] 2. In this invention, the torque power sensor 14 connected to the PTO drive shaft can measure the cutting power of the test bench in real time, serving as an indicator of the cutting effect. Combined with field trials, data analysis of different combinations of cutting parameters, using indicators such as forage cutting loss rate, stubble height, and grass fragmentation rate, yields several reasonable cutting parameters. This results in low-loss, low-energy, and high-efficiency operation, saving time and production costs for the development of disc cutter products. Attached Figure Description

[0071] Figure 1 This is a schematic diagram of the first overall structure of the disc-type cutter test device of the present invention;

[0072] Figure 2 This is a schematic diagram of the second overall structure of the disc-type cutter testing device of the present invention;

[0073] Figure 3 This is a schematic diagram of the fixed cutter disc assembly 6 of the disc-type cutter test device of the present invention;

[0074] Figure 4 This is a schematic diagram of the structure of the movable cutter head assembly 615 of the disc-type cutter test device of the present invention;

[0075] Figure 5a This is a cross-sectional dimension diagram of the first tower wheel of the disc-type cutter test device of the present invention;

[0076] Figure 5b This is a cross-sectional view of the second tower wheel of the disc-type cutter test device of the present invention;

[0077] Figure 6 This is a schematic diagram of the center distance adjustment component 4 of the disc-type cutter test device of the present invention;

[0078] Figure 7 This is a schematic diagram of the sliding welding assembly 7 of the disc-type cutter test device of the present invention;

[0079] Figure 8 This is a schematic diagram of the installation of the slipper welding assembly 7 of the disc-type cutter test device of the present invention;

[0080] Figure 9 This is a schematic diagram of the transmission of the disc-type cutter testing device of the present invention;

[0081] Figure 10 This is a schematic diagram showing the adjustment of the forward tilt angle θ of the disc cutter test device of the present invention.

[0082] The reference numerals in the attached figures are:

[0083] 1. Suspension frame assembly 11. First lower suspension pin

[0084] 12. Upper suspension pin; 13. Power input shaft

[0085] 14. Torque power sensor 15. Second lower suspension pin

[0086] 16. Floor support frame 17. First tower wheel

[0087] 18. First tensioning pulley 19. Lead screw tie rod

[0088] 110. Tractor PTO output shaft; 2. Lifting and folding assembly.

[0089] 21. Lifting arm; 22. Hydraulic cylinder

[0090] 23. Upper hinge point for frame lifting 24. Lower hinge point for frame lifting

[0091] 25. Hydraulic cylinder lower hinge point; 26. Cutting frame mounting hinge point

[0092] 3. Synchronous belt pressure pulley; 4. Center distance adjustment assembly

[0093] 41. Bearing with slider seat 42. First mounting plate

[0094] 43. Second mounting plate 44. Nut

[0095] 45. Lead screw 46. Handwheel

[0096] 47. Column 5, Lower Mounting Plate

[0097] 6. Fixed cutter head assembly 61. Cutter head

[0098] 62. Blade mounting screw 63. Blade

[0099] 64. Drum 65. Second belt-driven driven pulley

[0100] 66. Cutter head mounting shaft 67. Synchronous belt

[0101] 68. Synchronous pulley; 69. Upper square bearing seat.

[0102] 610. Bearing mounting screws; 611. Drum mounting screws

[0103] 613, Welded circular ring, 614 lower square seat bearing

[0104] 615. Movable cutter head assembly; 7. Sliding welding assembly.

[0105] 71. Upper welding plate; 72. Lower base plate

[0106] 73. Rear side panel 74. Mounting bolts

[0107] 8. Second tension pulley; 81. Second belt

[0108] 9. Gearbox assembly 91. Second chuck wheel

[0109] 92. First belt-driven driven pulley; 93. Gearbox housing

[0110] 94. Gearbox output shaft 95. Gearbox input shaft Detailed Implementation

[0111] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0112] like Figure 1 , Figure 2 and Figure 10 As shown, arrow V indicates the forward direction. A disc-type cutter test device includes a suspension frame assembly 1, a lifting and folding assembly 2, and a cutting component.

[0113] Among them, the suspension frame assembly 1 is located on the far left of the whole machine and is attached to the tractor.

[0114] The suspension frame assembly 1 includes a suspension frame body, a first lower suspension pin 11, an upper suspension pin 12, a power input shaft 13, a torque power sensor 14, a second lower suspension pin 15, a ground support 16, a first tower wheel 17, and a first tension wheel 18.

[0115] The main body of the suspension frame is constructed from multiple square tubes and sheet metal. An upper suspension pin 12, a first lower suspension pin 11, and a second lower suspension pin 15 are mounted on the main body of the suspension frame. The first lower suspension pin 11 is located at the front right of the suspension frame and connects to the lower suspension point of the tractor. The second lower suspension pin 15 is suspended at the lower left of the suspension frame and connects to another lower suspension point of the tractor. The suspension frame assembly 1 is attached to the tractor via the first lower suspension pin 11 and the second lower suspension pin 15. The upper suspension pin 12 is connected to the rear suspension point of the tractor via a lead screw 19. The power input shaft 13 is mounted in the center of the main body of the suspension frame.

[0116] The tractor's PTO output shaft 110 is connected to the power input shaft 13, on which a torque power sensor 14 and a first chuck 17 are mounted. A first tension pulley 18 is located behind the main suspension frame, and the first belt drive containing the first chuck 17 is tensioned by the first tension pulley 18. A ground support bracket 16 is located on the right side of the suspension frame assembly 1, providing support.

[0117] The cutting components include a synchronous belt pressure pulley 3, a center distance adjustment assembly 4, a lower mounting plate 5, a fixed cutter head assembly 6, a movable cutter head assembly 615, a sliding welding assembly 7, a second tensioning pulley 8, and a gearbox assembly 9.

[0118] like Figure 1 , Figure 2 and Figure 6 As shown, the center distance adjustment assembly 4 includes a bearing 41 with a slider seat, a first mounting plate 42, a second mounting plate 43, a nut 44, a lead screw 45, a handwheel 46, and a column 47.

[0119] Two pairs of uprights 47 are fixedly connected to the upper part of the lower mounting plate 5. A crossbeam is fixedly connected to the upper part of each pair of uprights 47 to form a pair of crossbeams. The two ends of the first mounting plate 42 and the second mounting plate 43 are fixed between the pair of crossbeams. The first mounting plate 42 and the second mounting plate 43 are arranged in parallel and with a gap.

[0120] A fixed cutter head assembly 6 and a movable cutter head assembly 615 are disposed between the first mounting plate 42 and the second mounting plate 43. The fixed cutter head assembly 6 is arranged close to the gearbox, while the movable cutter head assembly 615 is arranged away from the gearbox. The cutter head mounting shafts 66 of both the fixed cutter head assembly 6 and the movable cutter head assembly 615 are mounted between the first mounting plate 42 and the second mounting plate 43.

[0121] A slider bearing 41 is installed at the middle of the cutter head mounting shaft 66 of the movable cutter head assembly 615. The two sides of the slider on the slider bearing 41 are respectively mounted on the side end faces of the first mounting plate 42 and the second mounting plate 43. One end of a lead screw 45 is connected to the slider bearing 41, and the other end is connected to a handwheel 46. The middle part of the lead screw 45 is fitted with a nut 44, which is fixed between the first mounting plate 42 and the second mounting plate 43 by bolts. By rotating the handwheel 46, the slider bearing 41 and the cutter head mounting shaft 66 of the movable cutter head assembly 615 can be displaced axially along the lead screw 45, thereby adjusting the center distance of the cutter head.

[0122] The fixed cutter head assembly 6 has a fixed installation position, while the movable cutter head assembly 615 can be moved a certain distance away from the gearbox under the action of the center distance adjustment assembly 4.

[0123] like Figure 3 , Figure 6 and Figure 8 As shown, the fixed cutter head assembly 6 includes a cutter head 61, a blade mounting bolt 62, a blade 63, a roller 64, a second belt-driven driven pulley 65, a cutter head mounting shaft 66, a synchronous pulley 68, an upper square seat bearing 69, a bearing mounting screw 610, a roller mounting screw 611, a welding ring 613, and a lower square seat bearing 614.

[0124] The cutter head assembly of the fixed cutter head assembly has, from top to bottom, a timing pulley 68, an upper square seat bearing 69, a second belt drive driven pulley 65, a roller 64, a cutter head 61, and a lower square seat bearing 614 mounted on the cutter head mounting shaft 66.

[0125] The lower end of the cutter head mounting shaft 66 mates with the lower square bearing 614. The surface of the lower mounting plate 5 has through holes, and the lower square bearing 614 is fixedly mounted on the through holes of the lower mounting plate 5 by four bearing mounting screws 610. A transverse elongated hole is provided in front of and between the two rows of through holes.

[0126] The roller 64 and the cutter head 61 are fixed together by roller mounting screws 611.

[0127] A pair of blades 63 are symmetrically mounted on the cutter head 61. They are connected to the shoulder of the blade mounting bolt 62 through their own through holes. The blades 63 can rotate freely around the shoulder of the blade mounting bolt 62, which meets the conditions for using the tool.

[0128] A welded ring 613 is arranged below the cutter head 61 on the blade mounting bolt 62. The welded ring 613 is designed to ensure that the blade 63 can rotate freely around the blade mounting bolt 62 without colliding or interfering with the cutter head 61, thus ensuring operational safety.

[0129] The blade mounting bolt 62 has an M12×1.25 fine thread with a thread length of 24mm and a 6mm shoulder below the thread.

[0130] like Figure 4 As shown, the movable cutter head assembly 615 includes a cutter head 61, a blade mounting bolt 62, a blade 63, a roller 64, a cutter head mounting shaft 66, a timing pulley 68, a bearing with a slider seat 41, a bearing mounting screw 610, a roller mounting screw 611, a welding ring 613, and a lower square seat bearing 614.

[0131] The cutting disc assembly of the movable cutter has a cutting disc mounting shaft 66 on which, from top to bottom, a timing pulley 68, a bearing with a slider seat 41, a roller 64, a cutting disc 61, and a lower square seat bearing 614 are installed sequentially.

[0132] The lower end of the cutter head mounting shaft 66 mates with the lower square bearing 614. The surface of the lower mounting plate 5 has through holes, and the lower square bearing 614 is fixedly mounted on these through holes by four bearing mounting screws 610. A sliding block bearing 41 is mounted in the middle of the cutter head mounting shaft 66. The left side of the sliding block bearing 41 mates with the end of the lead screw 45. By rotating the handwheel 46, the movable cutter head assembly 615 can move a certain distance along the upper mounting plate 41 under the action of the lead screw 45. After the position of the sliding block bearing 41 is adjusted under the action of the lead screw 45, the positions of the cutter head mounting shaft 66 and the lower square bearing 614 also change accordingly. Then, the lower square bearing 614 is fixedly mounted on the lower mounting plate 5 with bolts, thus fixing the upper and lower ends of the cutter head mounting shaft 66. This allows for adjustment of the center distance between the two cutter heads.

[0133] The roller 64 and the cutter head 61 are fixed together by roller mounting screws 611.

[0134] A pair of blades 63 are symmetrically mounted on the cutter head 61. They are connected to the shoulder of the blade mounting bolt 62 through their own through holes. The blades 63 can rotate freely around the shoulder of the blade mounting bolt 62, which meets the conditions for using the tool.

[0135] A welded ring 613 is arranged below the cutter head 61 on the blade mounting bolt 62. The welded ring 613 is designed to ensure that the blade 63 can rotate freely around the blade mounting bolt 62 without colliding or interfering with the cutter head 61, thus ensuring operational safety.

[0136] The blade mounting bolt 62 has an M12×1.25 fine thread with a thread length of 24mm and a 6mm shoulder below the thread.

[0137] A timing belt 67 is fitted between the timing pulleys 68 of the fixed cutter head assembly 6 and the movable cutter head assembly 615. The timing belt pressure pulley 3 is mounted on the first mounting plate 42 and the second mounting plate 43, and its rim contacts the outer side of the timing belt 67 to provide tension.

[0138] like Figure 7 and Figure 8 As shown, the sliding welding component 7 is always attached to the ground. Its function is to make the lawnmower work close to the ground and protect the blade and the blade. By designing it to be movable, the length of its extension from the blade can be changed, which is also an important cutting parameter of the cutter, in order to meet the test requirements.

[0139] The sliding welding assembly 7 includes an upper welding plate 71, a lower base plate 72, and a rear side plate 73, wherein...

[0140] The tail ends of the upper welding plate 71 and the lower base plate 72 are connected by the rear side plate 73. The rear side plate 73 is provided with a through hole, and the upper welding plate 71 is provided with two longitudinal elongated holes with a preferred width of 10.5mm. The upper welding plate 71 and the lower base plate 72 are at a certain angle. When fixedly installed, the upper welding plate 71 is in contact with the lower surface of the lower mounting plate 5, and the lower base plate 72 is in contact with the ground.

[0141] The two longitudinal elongated holes on the upper welding plate 71 and the transverse elongated holes on the lower mounting plate 5 are fixed together by two mounting bolts 74. After changing the center distance and position of the cutter head, the relative position of the sliding welding assembly 7 with respect to the cutter head 61 and the lower mounting plate 5 is changed by moving the sliding welding assembly 7, so that the sliding welding assembly 7 is always located in front of the cutter head 61, and the length of the sliding welding assembly 7 extending out of the cutter head 61 can be changed.

[0142] The gearbox assembly 9 is installed on the far left of the lower mounting plate 5 and includes a second pulley 91, a first belt-driven driven pulley 92, a gearbox body 93, a gearbox output shaft 94, and a gearbox input shaft 95.

[0143] The gearbox body 93 is bolted to the rightmost side of the lower mounting plate 5, the second pulley 91 is mounted on the gearbox input shaft 95, and the first belt drive driven pulley 92 is mounted on the gearbox output shaft 94.

[0144] The first pulley 17 is connected to the first belt drive driven pulley 92 via a belt, forming a first belt drive. The second pulley 91 is connected to the second belt drive driven pulley 65 via a second belt 81, forming a second belt drive. The power on the first pulley 17 is transmitted to the reversing transmission component of the second belt drive driven pulley 65 through the first and second belt drives.

[0145] The second tensioning pulley 8 is located between the second pulley 91 and the second belt drive driven pulley 65, and it tensions the second belt 81.

[0146] The lifting and folding assembly 2 includes a lifting arm 21 and a hydraulic cylinder 22, located on the right side of the suspension frame assembly 1. The left side of the lifting arm 21 is hinged to the lower hinge point 24 of the frame lifting in the suspension frame assembly 1, and the rightmost and lowest end is hinged to the cutting frame mounting hinge point 26. The upper end of the hydraulic cylinder 22 is hinged to the upper hinge point 23 of the frame lifting in the suspension frame assembly 1, and the lower end is hinged to the lower hinge point 25 of the hydraulic cylinder in the middle of the lifting arm 21. This connection relationship constitutes the lifting and folding assembly 2.

[0147] After the mowing operation is completed, the cutting components are lifted up as a whole by retracting the hydraulic cylinder 22 in the lifting folding assembly 2 to facilitate field transportation.

[0148] like Figure 9 As shown, during operation, power is output from the tractor's PTO output shaft 110 to the test bench's power input shaft 13. This power is then transmitted via the first pulley 17 to the first belt drive driven pulley 92 on the gearbox assembly 9. The first tensioning pulley 18 tensions the belt of the first belt drive. The gearbox body 93 uses a double-acceleration bevel gear. After acceleration, the second pulley 91, under the tension of the second tensioning pulley 8, transmits power again via the second belt 81 to the second belt drive driven pulley 65. Finally, under the action of the synchronous belt 67, the two cutter discs 61 on the cutter rotate synchronously.

[0149] The length of the lead screw 19 can be adjusted by rotating the threaded tube in the middle of the lead screw 19, thereby adjusting the forward tilt angle of the cutter head 61.

[0150] like Figure 5a , 5b As shown, the first chuck 17 is designed with three different reference diameters, and the second chuck 91 is designed with two different reference diameters. According to relevant standards, the two chucks are determined to be A-type grooved wheel structures, with a groove angle of 34°, a groove spacing of 15mm, and a reference width of 11mm. Each selection of a different reference diameter will result in a different transmission ratio, and the two sets of chucks can obtain 6 different transmission ratios.

[0151] The method for adjusting the cutting parameters using the aforementioned disc-type cutter testing device includes the following steps:

[0152] S1. Cutter head speed adjustment:

[0153] Based on the speed requirements during the cutting test, select a set of grooves with reference diameters from the first pulley 17 in the first belt drive and the second pulley 91 in the second belt drive. Install the transmission belt in the corresponding grooves of the first pulley 17 and the second pulley 91 to complete the power transmission of the cutter. After completing a set of cutting tests, place the transmission belt in the other groove positions of the first pulley 17 and the second pulley 91 to adjust the speed of the cutter head.

[0154] According to relevant standards, the PTO output shaft 110 of the tractor has two speed settings: 540 r / min and 720 r / min. This is clearly insufficient to meet the adjustment requirements of the disc speed n. The first belt drive consists of a first pulley 17, a first driven pulley 92, and a first tensioner 18. The second belt drive consists of a second pulley 91, a second driven pulley 65, and a second tensioner 8. The specific transmission route diagram is as follows: Figure 9 As shown.

[0155] This application designs the driving pulleys in the first and second belt drives as A-type pulley structures, namely the first pulley 17 and the second pulley 91. The driven pulley is a common A-type pulley. The gearbox assembly 9 uses a 2x acceleration, and the synchronous belt drive uses a 1:1 transmission ratio. In this application, the first pulley 17 and the second pulley 91 are designed with 6 grooved pulleys and 4 grooved pulleys, respectively, and the basic parameters of the grooved pulleys are shown in the table below. Preferably, the lower groove depth of the pulley is set to 8.7mm, the upper groove depth is set to 2.7mm, the groove spacing is 15mm, the groove edge distance is 9mm, and the groove angle is selected as 34°.

[0156] Basic Parameter Table for Type A Pulley Grooved Wheel

[0157]

[0158]

[0159] Preferably, the first tractor wheel 17 is designed with three different reference diameters, and the second tractor wheel 91 is designed with two different reference diameters, thereby obtaining six different transmission ratios. Combined with the fact that the tractor PTO output shaft 110 has two speeds of 540 r / min and 720 r / min, 12 speed options can be achieved.

[0160] Preferably, the reference diameters of the first pulley 17 are designed to be 160, 132, and 100 mm, and the reference diameters of the second pulley 91 are designed to be 150 and 118 mm, respectively. This allows the first belt drive to have three selectable transmission ratios: 1.6, 1.32, and 1; and the second belt drive to have two transmission ratios: 1.875 and 1.475. Thus, the cutter head speed can be within the range of 2025 to 4320 r / min, providing a total of 12 speed options as shown in the table below, which can meet the test requirements.

[0161] Disc cutter head speed table under different transmission ratios

[0162]

[0163] S2. Changing cutter heads of different diameters

[0164] S2.1 The first cutter head 61 is connected to the cutter head mounting shaft 66 of the fixed cutter cutter head assembly 6 by a flat key. The cutter head mounting shaft 66 is equipped with a synchronous belt pulley 68, an upper square seat bearing 69, a second belt drive driven pulley 65 and a roller 64 from top to bottom.

[0165] S2.2 The second cutter head 61 is connected to the cutter head mounting shaft 66 of the movable cutter head assembly 615 via a flat key. The cutter head mounting shaft 66 is equipped with a timing pulley 68, a bearing with a slider seat 41 and a roller 64 from top to bottom.

[0166] S2.3, the upper square seat bearing 69 and the slider seat bearing 41 are both fixedly installed on the second mounting plate 43 and the first mounting plate 42. After each set of cutter discs has been tested, the second mounting plate 43 and the first mounting plate 42 can be removed, and the fixed cutter disc assembly 6 and the movable cutter disc assembly 615 can be taken out to replace the next set of cutter discs.

[0167] Preferably, the length of the second mounting plate 43 and the first mounting plate 42 is 1450mm, and both can be mounted on the test bench for cutter heads 61 with a diameter between 300 and 500mm.

[0168] The blade mounting screw 62 has an M12×1.25 fine thread with a thread length of 24mm and a 6mm shoulder below the thread. The blade 63 is attached to the shoulder via a 20mm through-hole pin. The blade 63 can rotate freely around the shoulder of the special bolt, meeting the requirements for the use of the spade. The blade of the specified size can be replaced by rotating the blade mounting screw 62 to meet the test requirements.

[0169] S3, Center Distance Adjustment:

[0170] When replacing the cutter heads with cutter heads of different diameters, the center distance between the two cutter heads must also be adjusted accordingly. The center distance between the cutter heads should be 20-50 mm larger than the diameter of the cutter head. The center distance between the two cutter heads 61 is adjusted by the center distance adjustment component 4.

[0171] S3.1, The bearing 41 with slider seat is installed in the middle part of the cutter head mounting shaft 66 of the movable cutter head assembly 615, and the two sides of the slider are respectively installed on the side end faces of the first mounting plate 42 and the second mounting plate 43.

[0172] S3.2 The right end of the lead screw 45 is connected to the bearing 41 with the slider seat, the left end is connected to the handwheel 46, and the middle part of the lead screw 45 is fitted with the nut 44.

[0173] S3.3 By rotating the handwheel 46, the cutter head mounting shaft 66 with the slider seat bearing 41 and the movable cutter head assembly 615 can be moved axially along the lead screw 45. Under the action of the lead screw 45, after the position of the slider seat bearing 41 is adjusted, the position of the cutter head mounting shaft 66 and the lower square seat bearing 614 will also change accordingly. At this time, the lower square seat bearing 614 is fixedly installed on the lower mounting plate 5 by bolts, thereby realizing the fixation of the upper and lower ends of the cutter head mounting shaft 66.

[0174] This allows for adjustment of the center distance between the two cutter heads;

[0175] S4. Position adjustment of sliding welding component 7:

[0176] S4.1 In the sliding welding assembly 7, the two longitudinal elongated holes on the upper welding plate 71 and the transverse elongated holes on the lower mounting plate 5 are fixed by two grounding sliding plate mounting bolts 74, so the sliding welding assembly 7 can move relative to the blade 63 in the front, back and left and right.

[0177] S4.2 After moving, the grounding plate mounting bolt 74 is inserted into the intersection of the two elongated holes for fixed installation;

[0178] S4.3 Finally, fix the through hole on the rear side plate 73 to the bottom plate 72 with two grounding sliding plate mounting bolts 74, and it will be firmly fixed in a specific position.

[0179] S5, Adjustment of the cutter head tilt angle θ, such as Figure 10 As shown.

[0180] S5.1 The forward tilt angle of the cutter head of the disc cutter test device is adjusted by the length of the lead screw 19. The disc cutter test device is attached to the rear three-point suspension device of the tractor. The lead screw 19 is connected to the upper suspension point and the tractor by the pin 12.

[0181] S5.2 By rotating the threaded tube in the middle of the lead screw 19 to adjust the length of the lead screw 19, the entire disc cutter test device will rotate forward or backward around the first lower suspension pin 11 and the second lower suspension pin 15, thereby realizing the adjustment of the forward tilt angle θ of the cutter head 61.

[0182] S6, Power Measurement of Cutting Operation on Test Bench

[0183] S6.1 Cutting power is an important indicator for evaluating disc cutters. The power of this invention comes from the PTO output shaft 110 of the tractor, which is connected to the power input shaft 13 of the output shaft test bench through the PTO transmission shaft.

[0184] S6.2 The power input shaft 13 and the torque power sensor 14 are connected by a keyway;

[0185] S6.3, the first tower wheel 17 is then mounted on the output shaft 13 of the torque power sensor 14;

[0186] S6.4 The cutting power of the test bench is measured in real time by the torque power sensor 14, which serves as an indicator of the cutting effect of the test bench.

Claims

1. A disc-type cutter testing device, characterized in that: The device includes a suspension frame assembly (1) and a cutting component; Among them, the suspension frame assembly (1) is located on the far left of the whole machine and is attached to the tractor; The suspension frame assembly (1) includes a suspension frame body, a first lower suspension pin (11), an upper suspension pin (12), a power input shaft (13), a torque power sensor (14), a second lower suspension pin (15), a ground support (16), a first tower wheel (17), and a first tension wheel (18). The main body of the suspension frame is made of multiple square tubes and plates. The upper suspension pin (12), the first lower suspension pin (11) and the second lower suspension pin (15) are set on the main body of the suspension frame. The first lower suspension pin (11) is set at the front right of the suspension body and is connected to the lower suspension point of the tractor. The second lower suspension pin (15) is located at the lower left of the main body of the suspension frame and is connected to another lower suspension point of the tractor. The suspension frame assembly (1) is attached to the tractor through the first lower suspension pin (11) and the second lower suspension pin (15). The upper suspension pin (12) is connected to the rear suspension point of the tractor through the lead screw (19). The power input shaft (13) is installed in the center of the main body of the suspension frame. The tractor's PTO output shaft (110) is connected to the power input shaft (13), and a torque power sensor (14) and a first tower wheel (17) are installed on the power input shaft (13); the first tensioning wheel (18) is arranged behind the main body of the suspension frame, and the first belt drive where the first tower wheel (17) is located is tensioned by the first tensioning wheel (18); the ground support (16) is located on the right side of the suspension frame assembly (1) and serves as a support. The cutting components include a synchronous belt pressure pulley (3), a center distance adjustment assembly (4), a lower mounting plate (5), a fixed cutter head assembly (6), a movable cutter head assembly (615), a sliding welding assembly (7), a second tensioning pulley (8), and a gearbox assembly (9). The center distance adjustment assembly (4) includes a bearing with a slider seat (41), a first mounting plate (42), a second mounting plate (43), a nut (44), a lead screw (45), a handwheel (46), and a column (47). Two pairs of columns (47) are fixedly connected to the top of the lower mounting plate (5), and a crossbeam is fixedly connected to the top of each pair of columns (47) to form a pair of crossbeams. The two ends of the first mounting plate (42) and the second mounting plate (43) are fixed between the pair of crossbeams. The first mounting plate (42) and the second mounting plate (43) are arranged in parallel and with a gap. A fixed cutter head assembly (6) and a movable cutter head assembly (615) are disposed between the first mounting plate (42) and the second mounting plate (43); the fixed cutter head assembly (6) is arranged close to the gearbox, and the movable cutter head assembly (615) is arranged away from the gearbox; the cutter head mounting shafts (66) of both the fixed cutter head assembly (6) and the movable cutter head assembly (615) are installed between the first mounting plate (42) and the second mounting plate (43); A slider bearing (41) is installed in the middle of the cutter head mounting shaft (66) of the movable cutter head assembly (615). The two sides of the slider on the slider bearing (41) are respectively installed on the side end faces of the first mounting plate (42) and the second mounting plate (43). One end of the lead screw (45) is connected to the slider bearing (41), and the other end is connected to the handwheel (46). The middle part of the lead screw (45) is fitted with a nut (44), and the nut (44) is fixed between the first mounting plate (42) and the second mounting plate (43) by bolts. By rotating the handwheel (46), the upper slider bearing (41) and the cutter head mounting shaft (66) of the movable cutter head assembly (615) can be displaced along the axial direction of the lead screw (45) to realize the adjustment of the center distance of the cutter head. The installation position of the fixed cutter head assembly (6) remains fixed, while the installation position of the movable cutter head assembly (615) can be moved a certain distance away from the gearbox under the action of the center distance adjustment assembly (4). The fixed cutter head assembly (6) includes a cutter head (61), blade mounting bolts (62), blades (63), a roller (64), a second belt drive driven pulley (65), a cutter head mounting shaft (66), a synchronous pulley (68), an upper square seat bearing (69), a bearing mounting screw (610), a roller mounting screw (611), a welding ring (613), and a lower square seat bearing (614). The cutter head mounting shaft (66) of the fixed cutter head assembly is equipped with a synchronous pulley (68), an upper square seat bearing (69), a second belt drive driven pulley (65), a roller (64), a cutter head (61), and a lower square seat bearing (614) from top to bottom. The movable cutter head assembly (615) includes a cutter head (61), blade mounting bolts (62), blades (63), rollers (64), cutter head mounting shaft (66), timing pulley (68), bearing with slider seat (41), bearing mounting screws (610), roller mounting screws (611), welding ring (613), and lower square seat bearing (614). The cutting disc mounting shaft (66) of the movable cutter disc assembly is equipped with a timing pulley (68), a bearing with a slider seat (41), a roller (64), a cutting disc (61), and a lower square seat bearing (614) from top to bottom; the bearing with a slider seat (41) is installed in the middle of the cutting disc mounting shaft (66); The lower end of the cutter head mounting shaft (66) of the fixed cutter head assembly (6) and the movable cutter head assembly (615) is engaged with the lower square seat bearing (614). The surface of the lower mounting plate (5) has through holes. The lower square seat bearing (614) is fixedly mounted on the through holes on the lower mounting plate (5) by four bearing mounting screws (610). A transverse elongated hole is provided in front of and in the middle of the two rows of through holes. The roller (64) and the cutter head (61) are fixed together by roller mounting screws (611); A pair of blades (63) are symmetrically mounted on the cutter head (61). They are connected to the shoulder of the blade mounting bolt (62) through their own through holes. The blades (63) can rotate freely around the shoulder of the blade mounting bolt (62) to meet the conditions for using the tool. A timing belt (67) is fitted between the timing pulleys (68) of the fixed cutter head assembly (6) and the movable cutter head assembly (615); the timing belt pressure pulley (3) is installed on the first mounting plate (42) and the second mounting plate (43), and the rim of the pulley contacts the outer side of the timing belt (67) to provide tension. The sliding welding assembly (7) includes an upper welding plate (71), a lower base plate (72), and a rear side plate (73), wherein, The tail ends of the upper welding plate (71) and the lower base plate (72) are connected by the rear side plate (73); the rear side plate (73) is provided with a through hole, and the upper welding plate (71) is provided with two longitudinal elongated holes. The upper welding plate (71) and the lower base plate (72) are at a certain angle. When fixedly installed, the upper welding plate (71) contacts the lower surface of the lower mounting plate (5), and the lower base plate (72) contacts the ground. The two longitudinal elongated holes on the upper welding plate (71) and the transverse elongated holes on the lower mounting plate (5) are fixed by two mounting bolts (74); after changing the center distance and position of the cutter head, the relative position of the sliding welding assembly (7) relative to the cutter head (61) and the lower mounting plate (5) is changed by moving the sliding welding assembly (7), so that the sliding welding assembly (7) is always located in front of the cutter head (61), and the length of the sliding welding assembly (7) extending out of the cutter head (61) can be changed; The gearbox assembly (9) is installed on the far left of the lower mounting plate (5) and includes a second pulley (91), a first belt drive driven pulley (92), a gearbox body (93), a gearbox output shaft (94), and a gearbox input shaft (95). The gearbox body (93) is bolted to the rightmost side of the lower mounting plate (5), the second pulley (91) is mounted on the gearbox input shaft (95), and the first belt drive driven pulley (92) is mounted on the gearbox output shaft (94); The first pulley (17) and the first belt drive driven pulley (92) are connected by a belt to form a first belt drive; the second pulley (91) and the second belt drive driven pulley (65) are connected by a second belt (81) to form a second belt drive; the power on the first pulley (17) is transmitted to the reversing transmission component of the second belt drive driven pulley (65) through the first belt drive and the second belt drive; The second tensioning pulley (8) is located between the second pulley (91) and the second belt drive driven pulley (65) to tension the second belt (81).

2. The disc-type cutter testing device as described in claim 1, characterized in that: The device also includes a lifting and folding assembly (2), which includes a lifting arm (21) and a hydraulic cylinder (22), located on the right side of the suspension frame assembly (1). The left side of the lifting arm (21) is hinged to the lower hinge point (24) of the frame lifting in the suspension frame assembly (1), and the rightmost and lowest end is hinged to the cutting frame mounting hinge point (26). The upper end of the hydraulic cylinder (22) is hinged to the upper hinge point (23) of the frame lifting in the suspension frame assembly (1), and the lower end is hinged to the lower hinge point (25) of the hydraulic cylinder in the middle of the lifting arm (21). Under this connection relationship, the lifting and folding assembly (2) is formed.

3. The disc-type cutter testing device as described in claim 1, characterized in that: Each blade mounting bolt (62) has a welded ring (613) located below the cutter head (61).

4. The disc-type cutter testing device as described in claim 1, characterized in that: The length of the lead screw (19) can be adjusted by rotating the threaded tube in the middle of the lead screw (19), thereby adjusting the forward tilt angle of the cutter head (61).

5. The disc-type cutter testing device as described in claim 1, characterized in that: The first tower wheel 17 is designed with three different reference diameters, and the second tower wheel (91) is designed with two different reference diameters. According to relevant standards, the two tower wheels are determined to be A-type grooved wheel structures, with a grooved wheel angle of 34°, a groove spacing of 15mm, and a reference width of 11mm. Each time a different reference diameter is selected, a different transmission ratio will be obtained, and the two tower wheels can obtain 6 different transmission ratios.

6. A method for adjusting cutting parameters using the disc-type cutter testing device according to any one of claims 1 to 5, characterized in that: The method includes the following steps: S1. Cutter head speed adjustment: According to the speed requirements in the cutting test, select a set of grooves with reference diameters from the first pulley (17) in the first belt drive and the second pulley (91) in the second belt drive, and install the transmission belt in the corresponding grooves of the first pulley (17) and the second pulley (91) to complete the power transmission of the cutter; after completing a set of cutting tests, place the transmission belt in other groove positions of the first pulley (17) and the second pulley (91) to adjust the speed of the cutter head. S2. Changing cutter heads of different diameters: S2.1 The first cutter head (61) is connected to the cutter head mounting shaft (66) of the fixed cutter cutter head assembly (6) by a flat key. The cutter head mounting shaft (66) is equipped with a synchronous pulley (68), an upper square seat bearing (69), a second belt drive driven pulley (65) and a roller (64) from top to bottom. S2.2 The second cutter head (61) is connected to the cutter head mounting shaft (66) of the movable cutter head assembly (615) by a flat key. The cutter head mounting shaft (66) is equipped with a timing pulley (68), a bearing with a slider seat (41) and a roller (64) from top to bottom. S2.3 The upper square seat bearing (69) and the slide block seat bearing (41) are fixedly installed on the second mounting plate (43) and the first mounting plate (42). After each set of cutter discs has been tested, the second mounting plate (43) and the first mounting plate (42) can be removed, and the fixed cutter disc assembly (6) and the movable cutter disc assembly (615) can be taken out to replace the next set of cutter discs. S3, Center Distance Adjustment: S3.1, The slider seat bearing (41) is installed in the middle part of the cutter head mounting shaft (66) of the movable cutter head assembly (615), and the two sides of the slider are respectively installed on the side end faces of the first mounting plate (42) and the second mounting plate (43); S3.2 The right end of the lead screw (45) is connected to the bearing (41) with the slider seat, the left end is connected to the handwheel (46), and the middle part of the lead screw (45) is fitted with the nut (44). S3.3 By rotating the handwheel (46), the cutter head mounting shaft (66) of the slider seat bearing (41) and the movable cutter head assembly (615) can be displaced axially along the screw (45). Under the action of the screw (45), after the position of the slider seat bearing (41) is adjusted, the position of the cutter head mounting shaft (66) and the lower square seat bearing (614) will also change accordingly. At this time, the lower square seat bearing (614) is fixedly installed on the lower mounting plate (5) by bolts, thereby realizing the fixation of the upper and lower ends of the cutter head mounting shaft (66). This allows for the adjustment of the center distance between the two cutter heads; S4. Position adjustment of the sliding welding assembly (7): S4.1 In the sliding welding assembly (7), the two longitudinal elongated holes on the upper welding plate (71) and the transverse elongated holes on the lower mounting plate (5) are fixed by two grounding sliding plate mounting bolts (74), so the sliding welding assembly (7) can move back and forth and left and right relative to the blade (63); S4.2 After moving, the grounding plate mounting bolt (74) is inserted into the intersection of the two elongated holes for fixed installation; S4.3 Finally, fix the through hole on the rear side plate (73) to the bottom plate (72) with two grounding sliding plate mounting bolts (74), and it will be firmly fixed in a specific position; S5. Adjustment of cutter head tilt angle θ: S5.1 The forward tilt angle of the cutter head of the disc cutter test device is adjusted by the length of the lead screw (19). The disc cutter test device is attached to the rear three-point suspension device of the tractor. The lead screw (19) is connected to the upper suspension pin (12) and the tractor. S5.2 By rotating the threaded tube in the middle of the lead screw (19) to adjust the length of the lead screw (19), the entire disc cutter test device will rotate forward or backward around the first lower suspension pin (11) and the second lower suspension pin (15), thereby realizing the adjustment of the forward tilt angle θ of the cutter head (61). S6, Power Measurement of Cutting Operation on Test Bench S6.1 The tractor PTO output shaft (110) is connected to the power input shaft (13) of the experimental device via the PTO drive shaft; S6.2 The power input shaft (13) and the torque power sensor (14) are connected by a keyway; S6.3, the first tower wheel (17) is then mounted on the output shaft of the torque power sensor (14); S6.4 The cutting power of the test bench is measured in real time by the torque power sensor (14) as an indicator of the cutting effect of the test bench.

7. The method for adjusting the cutting parameters of the disc-type cutter testing device as described in claim 6, characterized in that: In step S1, the first tractor wheel (17) is designed with three different reference diameters, and the second tractor wheel (91) is designed with two different reference diameters. This allows for six different transmission ratios. Combined with the fact that the tractor PTO output shaft (110) has two speeds of 540 r / min and 720 r / min, 12 speed options can be achieved.

8. The method for adjusting the cutting parameters of the disc-type cutter testing device as described in claim 6, characterized in that: In step S1, the reference diameters of the first pulley (17) are designed to be 160, 132, and 100 mm, respectively, and the reference diameters of the second pulley (91) are designed to be 150 and 118 mm, respectively, so that the first belt drive has three transmission ratios to choose from: 1.6, 1.32, and 1; the second belt drive is set with two transmission ratios: 1.875 and 1.475, respectively. Thus, the cutter head speed can have a total of 12 speed options in the range of 2025 to 4320 r / min.

9. The method for adjusting the cutting parameters of the disc-type cutter testing device as described in claim 6, characterized in that: In step S2, the length of the second mounting plate (43) and the first mounting plate (42) is 1450 mm. For cutter heads (61) with a diameter between 300 and 500 mm, they can be installed on the test bench.

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