A power harrow pressing roller suspension assembly

Abstract

The present application relates to a power harrow press roller suspension assembly, which includes a suspension beam, a suspension arm, and a press roller. The press roller is connected to the suspension arm via mounting assemblies at both ends. The suspension arm is connected to the suspension beam. A primary protection device is provided between the connecting assembly and the suspension arm. The primary protection device includes a suspension turntable, which is transferred to the suspension arm, and the mounting assembly is connected to the suspension turntable. The primary protection device is used to reduce the amplitude of the press roller. The primary protection device can also rotate the suspension turntable to drive the press roller to tilt upward and pass over obstacles. A secondary protection device is provided between the suspension arm and the suspension beam. The secondary protection device includes a connecting arm, which is connected to the suspension arm. The secondary protection device drives the connecting arm to tilt, thereby adjusting the suspension height of the press roller. The present application has the effect of adjusting the suspension height of the press roller in multiple stages and can adjust the suspension height of the press roller according to the working conditions of the press roller, thereby protecting the press roller suspension structure.

Description

Technical Field

[0001] The present application relates to the field of agricultural machinery, and in particular to a power harrow pressing roller suspension assembly. Background Art

[0002] The roller is a typical rolling, soil-contacting component of agricultural machinery, used to level and compact the soil. It is commonly installed on common agricultural machinery such as rotary tillers, moldboard plows, and power harrows. The roller acts primarily on the soil through its own gravity and the elastic force of its elastic components, compacting loose soil to retain moisture and also limiting soil depth. Proper soil leveling after mechanical treatment, such as with a power harrow, can reduce evaporation and improve seedling emergence, significantly impacting agricultural production.

[0003] Existing packing rollers mounted on power harrows are typically connected directly to the harrow's body, away from the machine, via a suspension structure. The harrow first processes the soil, followed by the packing rollers, which then level and compact it. Shock absorbers, typically a combination of damping springs and telescopic rods, are typically attached to both ends of the packing rollers to mitigate vibrations during operation.

[0004] With regard to the above-mentioned existing pressure roller suspension structure, the inventors found that although the shock-absorbing structure of the existing pressure roller used for the power harrow can buffer part of the vibration of the pressure roller and reduce the amplitude of the pressure roller when it encounters a relatively bumpy area during operation, it lacks protection measures for the structure at the connection position between the suspension structure and the fuselage, especially the connection position between the suspension arm and the suspension beam is damaged by the repeated up and down swinging of the pressure roller. Summary of the Invention

[0005] The suspension height of the press roller can be adjusted in multiple stages and can be adjusted according to the working conditions of the press roller to protect the press roller suspension structure. The present application provides a power harrow press roller suspension assembly.

[0006] The present application provides a power harrow pressing roller suspension assembly adopting the following technical solution:

[0007] A power harrow pressure roller suspension assembly includes a suspension beam, a suspension arm and a pressure roller, both ends of the pressure roller are connected to a mounting assembly, the pressure roller is connected to the suspension arm through the mounting assemblies at both ends, the suspension arm is connected to the suspension beam, a first-level protection device is provided between the connection assembly and the suspension arm, the first-level protection device includes a suspension turntable, the suspension turntable is transferred to the suspension arm, and the mounting assembly is connected to the suspension turntable; when the pressure roller is working normally, the first-level protection device applies a force to the pressure roller to reduce the amplitude of the pressure roller, when the pressure roller collides with an obstacle with a large resistance, the first-level protection device rotates the suspension turntable to drive the pressure roller to tilt upward and pass over the obstacle; a second-level protection device is provided between the suspension arm and the suspension beam, the second-level protection device includes a connecting arm, the connecting arm is connected to the suspension arm, and the second-level protection device drives the connecting arm to tilt so as to adjust the angle between the suspension arm and the suspension beam and thereby adjust the suspension height of the pressure roller.

[0008] By adopting the above technical solution, when the user uses the pressure roller, the first-level protection device applies a force to the pressure roller toward the ground when the pressure roller is working, so that the pressure roller is pressed against the ground to improve the effect of flattening the soil layer. When the pressure roller encounters a large obstacle, the force on the pressure roller is transmitted to the first-level protection device. The first-level protection device drives the suspension turntable to rotate, causing the mounting assembly connected to the suspension turntable to rotate eccentrically around the center of the suspension turntable, thereby driving the pressure roller to rotate eccentrically around the center of the suspension turntable, causing the pressure roller to tilt upward, so that the pressure roller can pass through obstacles and reduce damage to the pressure roller caused by collision with stable and solid rocks in the soil layer during operation. When the agricultural machinery's suspended pressure roller passes through a bumpy area, the second-level protection device is used to raise the suspension height of the pressure roller to reduce bumps and damage caused by collision between the pressure roller and the ground.

[0009] Optionally, the first-level protection device also includes a first guide rail, the first guide rail is connected to the suspension turntable through a guide rail clamp, the first guide rail is slidably provided with a first connecting frame, the first connecting frame can slide along the first guide rail, the mounting assembly is connected to the first connecting frame, and the suspension turntable is connected to a first shock-absorbing mechanism at a position corresponding to the first connecting frame. The first shock-absorbing mechanism applies a force along the length direction of the first guide rail to the first connecting frame, and the first shock-absorbing mechanism includes a guide rod and a cylinder, the guide rod is slidably provided in the cylinder, one end of the guide rod is located in the cylinder, a first shock-absorbing spring is provided in the cylinder, and the first The axial direction of the shock-absorbing spring is coaxially arranged with the guide rod, the first shock-absorbing spring is connected to one end of the guide rod located in the cylinder, the end of the guide rod located outside the cylinder is connected to a connector, and the connector is connected to the first connecting frame; the hanging turntable is also connected to a second guide rail, the length direction of the second guide rail is perpendicular to the length direction of the first guide rail, the second guide rail is slidably provided with a second connecting frame, the connector is hinged to the second connecting frame through a connecting rod, the second connecting frame is also connected to a second shock-absorbing mechanism, and the second shock-absorbing mechanism applies a force to the second connecting frame along the length direction of the second guide rail.

[0010] By adopting the above technical solution, when the user is in use, when the first-level protection device is in the first gear, when the pressure roller flattens the soil layer on the soil surface, the pressure roller is affected by the component force along the length direction of the guide rod, thereby driving the mounting assembly and the guide rod to move toward the cylinder. During the sliding process of the guide rod in the cylinder, on the one hand, the first shock-absorbing spring is compressed, and the first shock-absorbing spring exerts a force on the guide rod to slide outward of the cylinder, thereby reducing the vibration amplitude of a part of the pressure roller; on the other hand, the sliding of the guide rod into the cylinder drives the connector to slide toward the cylinder, and the connector drives the second connecting frame to slide along the length direction of the second guide rail away from the cylinder through the connecting rod. The second shock-absorbing mechanism exerts a force on the second connecting frame to make the second connecting frame slide along the second guide rail toward the cylinder, thereby forming a triangular shock-absorbing structure by the first guide rail, the first connecting frame, the cylinder, the guide rod, the connector, the second guide rail, the connecting rod, the second connecting frame and the second shock-absorbing mechanism, which ensures the stability of the pressure roller while greatly reducing the vibration amplitude of the pressure roller when it presses the soil layer on the ground, thereby improving the pressure effect.

[0011] The lifting mechanism is connected with the support frame of the second supporting cam, and the supporting cam is connected with the support frame of the second supporting cam.

[0012] By adopting the above technical solution, when the user uses it, when the resistance of the pressure roller colliding with the obstacle is large, the first-level protection device enters the second working gear. At this time, the pressure roller is subjected to a large radial force along its own radius, thereby generating a large component force along the length direction of the guide rod. As the connector rises, the connector drives the second connecting frame and the support roller to slide toward the arc support frame through the connecting rod, and causes the support roller to push the arc support frame to slide away from the cylinder, thereby pushing the connecting rod to slide toward the direction of the travel switch and finally causing the connecting rod to contact the travel switch, causing the travel switch to open the hydraulic cylinder, and the hydraulic rod of the hydraulic cylinder pushes the drive arm to move through the push roller, and the drive arm drives the suspension turntable to rotate, thereby driving the mounting assembly and the pressure roller to rotate eccentrically around the center of the suspension turntable and tilt upward, thereby allowing the pressure roller to pass over the obstacle, reducing damage to the pressure roller caused by the obstruction of hard stones in the soil layer and the expansion of the pressure roller.

[0013] 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole, the bosses comprise a through-hole, a screw bolt, and a nut. The two foot pieces comprise a through-hole, a screw bolt, and a nut.

[0014] By adopting the above technical solution, when the user uses it, when the pressure roller passes through a bumpy area, the pressure roller is impacted by the ground and tilted upward, and the pressure roller drives the suspension arm to tilt upward, thereby driving the connecting arm to rotate around the center position of the limiting arc disk in the arc opening of the limiting arc disk, thereby causing the arc springs on both sides of the connecting arm to deform, and the arc springs play a role in buffering the impact of the connecting arm. When the deformation of the arc spring reaches the maximum, the connecting arm continues to tilt upward, thereby pushing the limiting arc disk to rotate around its own center. The rotation of the limiting arc disk causes the positioning disk to squeeze the limiting balls in the mounting grooves on both sides of the limiting disk, causing the limiting balls to slide into the mounting grooves, thereby causing the limiting balls to move from the positioning disk The limit ball is re-engaged in the positioning groove of the positioning plate. At this time, the arc opening of the limit arc plate reaches a higher position as the limit arc plate rotates, thereby increasing the height of the connecting arm connected to one end of the suspension arm, thereby increasing the suspension height of the suspension arm, the mounting assembly and the pressure roller, reducing the collision between the pressure roller and the ground, thereby reducing the bounce of the pressure roller due to collision with the ground, and reducing the damage caused by the pressure roller collision with the ground during transportation.

[0015] Optionally, the multiple positioning grooves of each positioning plate are arranged in a circular array around the axis of the corresponding positioning plate, and the depth of the positioning grooves gradually increases from the positioning grooves located in the middle position of the positioning plate along the height direction to the positioning grooves located near the two sides of the positioning plate along the height direction.

[0016] By adopting the above technical solution, when the user uses it, the depth of the positioning groove of the positioning plate gradually increases from the positioning groove near the middle position of the positioning plate along the height direction to the positioning groove near the two sides of the positioning plate along the height direction, so that the limiting ball is more firmly engaged when it is re-engaged in the positioning groove near the two sides of the positioning plate along the height direction as the limiting arc plate rotates, preventing the limiting arc plate from rotating in the opposite direction and returning to its original position due to the inertia of the movement of the connecting arm after the limiting arc plate rotates.

[0017] Optionally, the two positioning plates of the secondary protection device are jointly slidably provided with an adjusting rod, and the positioning plates can slide along the length direction of the adjusting rod. The adjusting rod is connected to the suspension beam, and a bidirectional screw is commonly threadedly connected between the two positioning plates. The threads on both sides of the bidirectional screw are set in opposite directions, and the two positioning plates are respectively located on both sides of the bidirectional screw. The rotation of the bidirectional screw can drive the two positioning plates to slide in opposite directions.

[0018] By adopting the above technical solution, when the user uses it, the user rotates the two-way screw, and the two-way screw drives the two positioning plates to slide along the adjusting rod in the direction away from each other, so that the limiting balls on both sides of the limiting arc plate are respectively moved out of the positioning grooves at the corresponding positions of the two positioning plates. At this time, under the action of gravity, the limiting arc plate and the connecting arm rotate around the middle position of the limiting arc plate, driving the suspension arm and the mounting assembly to rotate with the connecting arm, and finally making the pressing roller pressed against the ground again under the action of gravity. After passing the bumpy area, the user can release the limiting arc plate and the raised connecting arm by rotating the two-way screw, which is convenient for user use.

[0019] Optionally, the suspension beam is connected to an outer rod sleeve on the side corresponding to the pressing roller, an inner rod is slidably provided on the inner side of the outer rod sleeve, the inner rod can slide along the length direction of the outer rod sleeve, the outer peripheral wall of the outer rod sleeve is connected to a support block, and the end of the inner rod outside the outer rod sleeve is hinged with a pressing plate, which contacts the ground to flatten the raised part of the ground.

[0020] By adopting this technical solution, when the user uses the inner rod, it extends from the outer rod sleeve. The pressure plate hinged to the inner rod contacts the soil surface, flattening any bumps on the soil surface before the pressure roller begins to press. This not only reduces the pressure roller's workload, but also reduces damage caused by collisions. A return spring is connected to the inner rod along the length of the cylinder, driving the inner rod to slide away from the support block, thereby pressing the pressure plate tightly against the soil surface and improving its flattening effect.

[0021] Optionally, the pressure plate is tilted from top to bottom away from the pressure roller, a pressure plate is fixed to the bottom of the pressure plate, the pressure plate is tilted from bottom to top away from the pressure plate, a return spring is connected to the position of the pressure plate away from the pressure plate, one end of the return spring is connected to the support block, the return spring applies a force to the pressure plate to move it toward the support block, and a plurality of interlaced elliptical protrusions are formed on the side of the pressure plate away from the pressure plate.

[0022] By adopting the above technical solution, when the user uses it, the pressure plate comes into contact with the surface of the soil layer along with the outer rod sleeve and the inner rod. When there is a bulge on the surface of the soil layer, the pressure plate comes into contact with the bulge on the surface of the soil layer, and the inclined pressure plate rotates around the hinge position between itself and the inner rod, so that the pressure plate rotates toward the bulge position on the bulge surface, so that the pressure plate squeezes the bulge on the surface of the soil layer, and the elliptical bulge on the surface of the pressure plate plays a better role in squeezing and crushing the bulge on the surface of the soil layer. After the pressure plate crushes the bulge on the surface of the soil layer or presses the raised stones on the surface of the soil layer into the soil layer, the return spring pulls the pressure plate to move toward the support block, thereby driving the pressure plate to rotate in the opposite direction around the hinge position between itself and the inner rod, so that the pressure plate returns to its original position.

[0023] Optionally, the outer rod sleeve is connected to a fixing frame at one end away from the suppression plate, and fixing bolts are connected on both sides of the fixing frame. The suspension beam is fixedly connected to connecting ear plates at positions on both sides of the corresponding fixing frame. Each connecting ear plate has multiple fixing holes along its own height direction, and the fixing bolts can be set through the fixing holes of the connecting ear plates.

[0024] By adopting the above technical solution, the user can adjust the height of the pressure plate and the pressure plate according to the needs of use. The user adjusts the fixing bolts on both sides of the fixing frame through the fixing holes of different heights of the connecting ear plates to install the fixing frame to different heights, thereby adjusting the height of the inner rod, outer rod sleeve, pressure plate and pressure plate.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The design of the suspension arm, the suspension beam, the pressure roller, the installation assembly, the primary protection device, the suspension turntable, the first guide rail, the first connecting frame, the first shock-absorbing mechanism, the cylinder, the first shock-absorbing spring, the guide rod, the connector, the connecting rod, the second connecting frame, the second guide rail, the second shock-absorbing mechanism, the mounting seat, the connecting rod, the arc-shaped support frame, the support roller, the second shock-absorbing spring, the travel switch, the hydraulic cylinder, the push roller, the drive arm and the connecting groove can form two working gears to protect the pressure roller. When the pressure roller is working normally, the first guide rail, the first connecting frame, the first shock-absorbing mechanism, the cylinder, the first shock-absorbing spring, the guide rod and the connector can eliminate the vibration of part of the pressure roller along the length direction of the first guide rail and reduce the amplitude of part of the pressure roller. In addition, the connecting rod, the second guide rail, the second connecting frame, the first The second shock-absorbing mechanism, the mounting seat, the connecting rod, the arc-shaped support frame, the support roller and the second shock-absorbing spring eliminate the vibration of part of the pressure roller along the length direction of the second guide rail, further reducing the amplitude of the pressure roller. The first guide rail, the second guide rail, the first connecting frame, the second connecting frame, the first shock-absorbing mechanism and the second shock-absorbing mechanism form a triangular shock-absorbing structure, so that the pressure roller can more stably contact the ground to play the role of pressing the soil layer. When the pressure roller encounters an obstacle that cannot be flattened, the connecting rod contacts the travel switch to open the travel switch, so that the hydraulic rod of the hydraulic cylinder pushes the push roller in the connecting groove of the driving arm, further driving the suspension turntable to rotate, so that the mounting assembly and the pressure roller are tilted upward, so that the pressure roller can pass over the obstacle, reducing the damage to the pressure roller caused by the forced collision of the pressure roller with the obstacle;

[0027] 2. The design of the secondary protection device, positioning plate, limit arc plate, positioning groove, mounting groove, limit ball, limit spring, arc spring, connecting arm, adjustment rod and bidirectional screw can buffer the up and down swing of the suspension arm and the connecting arm through the arc spring when the pressure roller passes through a bumpy area, reduce the swing amplitude of the connecting arm and thus reduce the damage to the suspension arm and the pressure roller caused by the up and down swing impact. When the passing area is too bumpy and may cause damage to the connecting arm and the pressure roller, the limit arc plate rotates to rotate the arc opening of the limit arc plate upward, thereby lifting the connecting arm set in the arc opening of the limit arc plate, and ultimately lifting the pressure roller. When passing through a bumpy area, the pressure roller can be automatically raised to protect the pressure roller and the suspension arm structure;

[0028] 3. The design of the fixing frame, fixing bolts, connecting ear plates, fixing holes, outer rod sleeves, inner rods, reset springs, support blocks, pressure plates, reset springs and pressure plates can press debris on the surface of the soil layer into the soil layer before the pressure roller presses the soil layer, thereby reducing the workload of the pressure roller and reducing the bounce of the pressure roller caused by debris on the surface of the soil layer, thereby further protecting the structure of the pressure roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0030] Figure 2 This is a schematic diagram of the structure of the first-level protection device of an embodiment of the present application;

[0031] Figure 3 This is a cross-sectional view of the structure of the first-level protection device of an embodiment of the present application;

[0032] Figure 4 yes Figure 3 Enlarged view of part A;

[0033] Figure 5 This is a schematic diagram of the structure of the pressure plate in an embodiment of the present application;

[0034] Figure 6 This is an exploded view of the secondary protection device of an embodiment of the present application;

[0035] Figure 7 This is a cross-sectional view of the structure of the secondary protection device of an embodiment of the present application;

[0036] Figure 8 yes Figure 7 Magnified view of part B.

[0037] Explanation of the reference numerals: 1. Suspension beam; 11. Mounting bracket; 12. Connecting ear plate; 13. Fixing hole; 14. Fixing frame; 15. Outer rod sleeve; 16. Inner rod; 161. Crushing plate; 17. Support block; 18. Return spring; 19. Mounting frame; 191. Pressing plate; 192. Pressing plate; 193. Reinforcement rib; 2. Suspension arm; 21. Suspension groove; 22. Connecting arm; 23. Adjusting rod; 3. Mounting assembly; 31. Mounting housing; 32. Mounting bearing; 4. Pressing roller; 41. Pressing shaft; 5. Primary protection device; 51. Suspension turntable; 52. Guide rail clamp; 53. First guide rail; 54. First connecting frame; 55. First Second guide rail; 56, second connecting frame; 57, connecting rod; 58, support roller; 59, hydraulic cylinder; 591, driving arm; 592, connecting groove; 593, push roller; 6, first shock-absorbing mechanism; 61, cylinder; 62, first shock-absorbing spring; 63, guide rod; 64, connector; 7, second shock-absorbing mechanism; 71, mounting seat; 72, connecting rod; 73, second shock-absorbing spring; 74, arc-shaped support frame; 75, travel switch; 8, secondary protection device; 81, positioning plate; 82, bidirectional screw; 83, turntable; 84, limit arc plate; 85, mounting groove; 86, limit spring; 87, limit ball; 88, limit groove; 89, arc spring. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-8 This application is described in further detail.

[0039] The first embodiment of the present application discloses a suspension assembly for a power harrow pressing roller 4.

[0040] Reference Figure 1 The suspension beam 1 includes a horizontally extending suspension beam 1 and a mounting bracket 11 connected to one side of the suspension beam 1. The mounting bracket 11 is used to connect the suspension beam 1 to various agricultural machinery. Suspension arms 2 are connected to both ends of the suspension beam 1 along its length. Mounting assemblies 3 are connected to the sides of the two suspension arms 2 that are close to each other. A pressing roller 4 is connected between the two mounting assemblies 3.

[0041] Reference Figure 1-Figure 3Each suspension arm 2 is connected to a primary protection device 5, each comprising a suspension turntable 51. Two suspension turntables 51 are respectively connected to corresponding suspension arms 2. The two suspension turntables 51 are coaxially arranged, with the axial direction of the suspension turntables 51 parallel to the length of the suspension beam 1. Each suspension turntable 51 is bolted to a guide rail clamp 52 on the side near the mounting assembly 3. Each guide rail clamp 52 is secured with a first guide rail 53, the length of which is perpendicular to the length of the suspension beam 1. Each first guide rail 53 is slidably mounted with a first connecting bracket 54, which is capable of sliding along the length of the corresponding first guide rail 53. The mounting assembly 3 includes a mounting housing 31 and a mounting bearing 32. The mounting housing 31 is located near the bottom of the suspension turntable 51, and the mounting bearing 32 is snapped into the corresponding mounting housing 31. A pressing shaft 41 is fixedly connected to the middle position of the pressing roller 4. The two ends of the pressing shaft 41 are respectively transferred into the two mounting bearings 32. The two first connecting frames 54 are respectively connected to the two mounting housings 31 by bolts. A first shock absorbing mechanism 6 is provided at the position corresponding to the first guide rail 53 of each suspension turntable 51. The first shock absorbing mechanism 6 includes a cylinder 61, which is bolted to the corresponding suspension turntable 51. The length direction of the cylinder 61 is parallel to the length direction of the first guide rail 53. A guide rod 63 is slidably provided on the inner peripheral wall of each cylinder 61, and the guide rod 63 can slide along the length direction of the cylinder 61. Each cylinder 61 is provided with a first damping spring 62, with both ends of the first damping spring 62 fixed to the corresponding guide rod 63 and cylinder 61, respectively. The first damping spring 62 and guide rod 63 are coaxially arranged, and the first damping spring 62 exerts a force on the guide rod 63, causing it to extend out of the cylinder 61. A connector 64 is fixed to one end of the guide rod 63 outside the cylinder 61, and the connector 64 is bolted to the first connecting frame 54.

[0042] Reference Figure 2-Figure 4Each suspended turntable 51 is fixedly connected to a second guide rail 55 at a position near one end of the first guide rail 53 connected to it. The second guide rail 55 is located on one side of the first guide rail 53, and the length direction of the second guide rail 55 is perpendicular to the length direction of the first guide rail 53. Each second guide rail 55 is slidably mounted with a second connecting bracket 56, which can slide along the length direction of the second guide rail 55. The connector 64 is hinged to the second connecting bracket 56 via a connecting rod 57. The movement of the connector 64 can drive the second connector 64 to slide along the second guide rail 55 through the connecting rod 57. Each second connecting bracket 56 is connected to a support roller 58 at a position away from the corresponding first guide rail 53. The support roller 58 can rotate about its own axis. Each suspension turntable 51 is provided with a second shock absorbing mechanism 7 at one end of the second guide rail 55 connected thereto, away from the corresponding first guide rail 53. Each second shock absorbing mechanism 7 includes a mounting seat 71, which is fixed to the corresponding suspension turntable 51. Each mounting seat 71 is provided with a connecting rod 72 slidably disposed near both sides along the length direction of the first guide rail 53. The length direction of the connecting rod 72 is parallel to the length direction of the corresponding second guide rail 55, and the connecting rod 72 can slide along its own length direction within the mounting seat 71. A second shock absorbing spring 73 is provided within each mounting seat 71 at the position corresponding to each connecting rod 72. The two ends of each second shock absorbing spring 73 are respectively connected to the corresponding mounting seat 71 and the corresponding connecting rod 72. The second shock absorbing spring 73 is located outside the corresponding connecting rod 72 and applies a force to the connecting rod 72, causing the connecting rod 72 to slide toward the first guide rail 53. Two connecting rods 72 slidingly connected to the same mounting seat 71 are fixedly connected to an arc-shaped support frame 74 at one end close to the first guide rail 53. The arc mouth of the arc-shaped support frame 74 is set toward the rotation center of the hanging turntable 51. The center of the arc-shaped support frame 74 coincides with the center of the hanging turntable 51, and the support roller 58 can contact the corresponding arc-shaped support frame 74.

[0043] When the user is in use, the pressing roller 4 levels and compacts the soil layer, encounters resistance from the soil layer along the radial direction of the pressing roller 4 , and generates a vertical upward component force along the radial direction of the pressing roller 4 . At this time, the pressing shafts 41 at both ends of the pressing roller 4 drive the mounting assemblies 3 at both ends to have a tendency to move upward, thereby causing the first connecting frames 54 at both ends of the pressing roller 4 to have a tendency to slide upward along the first guide rail 53, and the first connecting frame 54 slides upward along the first guide rail 53, driving the connector 64 and the guide rod 63 to slide upward, and the guide rod 63 compresses the first shock-absorbing spring 62 in the cylinder 61, and the first shock-absorbing spring 62 exerts a force on the guide rod 63 to make the guide rod 63 slide out of the cylinder 61. At the same time, the connector 64 pushes the second connecting frame 56 to slide along the second guide rail 55 away from the first guide rail 53 through the connecting rod 57, so that the support roller 58 connected to the second connecting frame 56 contacts the arc support frame 74, thereby pushing the two connecting rods 72 to slide in the mounting seat 71 away from the first guide rail 53, thereby compressing the corresponding second shock-absorbing spring 73. After the second shock-absorbing spring 73 is compressed, it exerts a force on the connecting rod 72 in the direction of the first guide rail 53. A triangular damping structure is formed by the pressing shaft 41, the mounting assembly 3, the first connecting frame 54, the first guide rail 53, the connector 64, the guide rod 63, the cylinder 61, the first damping spring 62, the connecting rod 57, the second guide rail 55, the second connecting frame 56, the support roller 58, the curved support frame 74, the connecting rod 72, the mounting seat 71, and the second damping spring 73. The vibration generated by the pressing roller 4 when leveling the ground is partially applied by the first damping spring 62 to the connector 64, the guide rod 63, and the first connecting frame 54, thereby buffering the vibration along the length of the first guide rail 53. Another portion is transmitted to the second connecting frame 56 via the connecting rod 57. The second connecting frame 56 drives the support roller 58 to push the curved support frame 74, which in turn drives the connecting rod 72 to compress the second damping spring 73, thereby buffering some of the vibration along the length of the second guide rail 55. The cooperation between the first damping mechanism 6 and the second damping mechanism 7 improves the damping effect on the pressing roller 4, enabling the pressing roller 4 to more stably level the soil layer.

[0044] Reference Figure 2-Figure 4Each mounting seat 71 is bolted to a travel switch 75 on one side away from the arc-shaped support frame 74 connected to it. A connecting rod 72 connected to the same mounting seat 71 can push the corresponding travel switch 75 on and off. When the connecting rod 72 contacts the travel switch 75, the travel switch 75 turns on. When the connecting rod 72 separates from the travel switch 75, the travel switch 75 turns off. A driving arm 591 is fixedly connected to each suspension turntable 51 at a position above the corresponding second guide rail 55. The length of the driving arm 591 is arranged along the radial direction of the suspension turntable 51. Each driving arm 591 has a connecting slot 592 along its length. Each suspension arm 2 is connected to a hydraulic cylinder 59 by bolts near the driving arm 591. The hydraulic rod of each hydraulic cylinder 59 is fixed with a push roller 593. The push roller 593 is slidably connected to the connecting groove 592 of the corresponding driving arm 591. The push roller 593 is located near the middle position of the connecting groove 592 of the driving arm 591 along its own length. The hydraulic cylinder 59 can push the driving arm 591 to move through the push roller 593. The travel switch 75 is connected to the hydraulic cylinder 59, and the travel switch 75 can control the extension and retraction of the hydraulic rod of the hydraulic cylinder 59.

[0045] When the user is in use, when the pressing roller 4 hits the obstacle, the pressing roller 4 is subjected to greater resistance, so that the first connecting frame 54 slides upward along the first guide rail 53, driving the connector 64 and the guide rod 63 to slide upward along the cylinder 61. During the upward sliding process of the connector 64 along the guide rod 63, the second connecting frame 56 is driven by the connecting rod 57 to slide along the second guide rail 55 away from the first guide rail 53, so that the support roller 58 pushes the arc-shaped support frame 74 and the two connecting rods 72 to slide away from the first guide rail 53, compressing the second shock-absorbing spring 73. When the pressing roller 4 is pressed against the obstacle and cannot cross the obstacle, the upward supporting force exerted on the pressing roller 4 reaches its maximum. At this time, the second connecting frame 56 is driven by the connecting rod 57 to slide along the second guide rail 55 away from the first guide rail 53. The second shock-absorbing spring 73 is compressed to the maximum limit, and the connecting rod 72 contacts the travel switch 75 to turn on the travel switch 75. The travel switch 75 controls the hydraulic cylinder 59 to turn on, so that the hydraulic rod of the hydraulic cylinder 59 extends, and the hydraulic rod of the hydraulic cylinder 59 drives the push roller 593 to push the driving roller in the connecting groove 592 of the driving roller. The driving roller drives the suspension turntable 51 to rotate around its own rotation center in the suspension arm 2, thereby driving the mounting assembly 3 and the pressure roller 4 to rotate around its rotation center with the suspension turntable 51. As the suspension turntable 51 rotates, the pressure roller 4 is lifted upward, so that the pressure roller 4 can pass over the obstacle, reducing the damage to the pressure roller 4 caused by the forced collision and squeezing of the pressure roller 4 to pass over the obstacle.

[0046] Reference Figure 3 and Figure 5Two connecting lugs 12 are fixedly connected to the two ends of the suspension beam 1 near the pressure roller 4. The two connecting lugs 12 near the same end of the pressure roller 4 form a group of connecting lugs 12. The length direction of the connecting lugs 12 is vertically arranged perpendicular to the length direction of the suspension beam 1. Each connecting lug 12 is provided with a plurality of fixing holes 13 along its length. A fixing bracket 14 is provided between each group of connecting lugs 12. The fixing bracket 14 is threadedly connected to fixing bolts on both sides of the corresponding connecting lugs 12. The fixing bolts on both sides of the fixing bracket 14 pass through the fixing holes 13 and pass through the two connecting lugs 12 in the same group, thereby fixing the fixing bracket 14 between the two connecting lugs 12 in the same group. An outer rod sleeve 15 is fixedly connected to the bottom of each fixing bracket 14. The length direction of the outer rod sleeve 15 is vertically arranged. An inner rod 16 is slidably provided on the inner peripheral wall of each outer rod sleeve 15. The inner rod 16 can slide along the length direction of the corresponding outer rod sleeve 15, and one end of the inner rod 16 extends out of the outer rod sleeve 15. A support block 17 is fixed to the outer circumference of each outer rod sleeve 15. The support block 17 is located near the fixed frame 14. A return spring 18 is fixed to the bottom of each support block 17. Each return spring 18 is fixed to the corresponding inner rod 16 at its end away from the support block 17. Each inner rod 16 is hingedly connected to a mounting bracket 19 at the end outside the outer rod sleeve 15. A pressure plate 191 is fixed to both mounting brackets 19 at their bottoms. The pressure plate 191 is tilted downward from the end closest to the pressure roller 4 to the end away from the pressure roller 4. A pressure plate 192 is fixed to the end of the pressure plate 191 away from the pressure roller 4. The pressure plate 192 is tilted upward from the end closest to the pressure roller 4 to the end away from the pressure roller 4. The side of the pressure plate 192 away from the pressure roller 4 is formed with multiple interlaced elliptical protrusions. A reinforcing rib 193 is fixed to the connection between the pressure plate 192 and the pressure plate 191. The two support blocks 17 are also fixed with a crushing plate 161 near the pressing roller 4. The length direction of the crushing plate 161 is arranged along the length direction of the suspension beam 1. The crushing plate 161 is "V"-shaped, and the opening is arranged away from the pressing roller 4.

[0047] When used, before the roller 4 levels and compacts the soil, the pressing plate 191 contacts the soil. When the pressing plate 191 strikes an obstacle in the soil, the tilted pressing plate 191 generates an upward force, which drives the mounting frame 19 to rotate about its hinged connection with the inner rod 16. This in turn drives the flat plate 192 to rotate downward about the hinged connection between the mounting frame 19 and the inner rod 16, crushing clods in the soil or pressing hard obstacles into the soil. The cooperation between the pressing plate 191 and the flat plate 192 reduces the power required by the roller 4 to level and compact the ground when the ground is undulating, thereby reducing vibration and damage to the roller 4 caused by vibration. The soil-breaking plate 161 breaks up large clods raised by the roller 4, thus crushing the soil and forming a finer and flatter seed bed, thus improving the soil preparation effect of the roller 4.

[0048] Reference Figure 5-Figure 7 Each suspension arm 2 is formed with a suspension slot 21 near the suspension beam 1. A connecting arm 22 is bolted into the suspension slot 21 of each suspension arm 2. The suspension arm 2 contacts the top of the connecting arm 22 at the position corresponding to its own suspension slot 21. The suspension beam 1 is fixed with an adjustment rod 23 at the corresponding positions near both ends. The length direction of the adjustment rod 23 is arranged along the length direction of the suspension beam 1. Each connecting arm 22 is connected to the corresponding adjustment rod 23, and the connecting arm 22 can rotate around the axis of the adjustment rod 23. Each connecting arm 22 is provided with a secondary protection device 8 at a position away from the suspension arm 2. Each secondary protection device 8 includes two positioning disks 81. The two positioning disks 81 of the same secondary protection device 8 form a group of positioning disks 81. Each positioning disk 81 is slidably connected to the corresponding adjustment rod 23. The positioning disk 81 can slide along the length direction of the adjustment rod 23. The axes of the two groups of positioning disks 81 are coaxially arranged. A bidirectional screw 82 is rotatably connected to each of the suspension beams 1 at the positions corresponding to the positioning disks 81. The threads on both sides of the bidirectional screw 82 are arranged in opposite directions. The two positioning disks 81 in the same group are respectively threadedly connected to the two sides of the corresponding bidirectional screw 82. The rotation of the bidirectional screw 82 can drive the two positioning disks 81 to slide in opposite directions along the adjustment rod 23. A rotating disk 83 is fixed to the end of each bidirectional screw 82 away from each other, and the rotating disk 83 can drive the corresponding bidirectional screw 82 to rotate.

[0049] Reference Figure 6-Figure 8A limiting arc disk 84 is provided between the two positioning disks 81 connected to the same adjusting rod 23. The limiting arc disk 84 is connected to the corresponding adjusting rod 23. The limiting arc disk 84 is in the shape of a circular arc and is coaxial with the positioning disk 81. The connecting arm 22 is provided through the arc opening of the corresponding limiting arc disk 84. Each limiting arc disk 84 is provided with mounting grooves 85 along both sides of its own axis. The length direction of the mounting groove 85 is arranged along the axial direction of the limiting arc disk 84, and the length directions of the two mounting grooves 85 provided on the same limiting arc disk 84 are collinear. A limiting spring 86 is fixed in each mounting groove 85 of each limiting arc disk 84, and the axial direction of the limiting spring 86 is arranged in the same direction as the length direction of the mounting groove 85. A limiting ball 87 is slidably mounted within each mounting slot 85 of each limiting arc disc 84. The limiting ball 87 is secured to a limiting spring 86 located within the same mounting slot 85. The limiting spring 86 applies a force to the limiting ball 87, causing it to slide out of the mounting slot 85 of the limiting arc disc 84. Each set of positioning discs 81 is provided with a plurality of limiting slots 88 on one side thereof. The plurality of limiting slots 88 on the same positioning disc 81 are arranged in a circular array around the axis of the positioning disc 81. The depth of the positioning slot located in the middle of the positioning disc 81 along the height direction is less than the depth of the positioning slots located on either side of the positioning disc 81 along the height direction. The limiting balls 87 on either side of the limiting arc disc 84 can be respectively engaged with the positioning slots of the positioning discs 81 located on either side of the limiting arc disc 84. Each limiting arc disk 84 is fixed with an arc spring 89 at the positions on both sides of the connecting arm 22 passing through itself. The axial direction of the arc spring 89 is arranged along the circumference of the limiting arc disk 84. The two arc springs 89 connected to the same limiting arc disk 84 are respectively fixed to the corresponding connecting arm 22 at the positions on both sides of the circumference of the limiting arc disk 84.

[0050] When the user is in use, when the pressure roller 4 passes through a bumpy area, the pressure roller 4 is impacted by the raised part of the ground, causing the pressure roller 4 to bounce upward, thereby driving the suspension arms 2 on both sides to swing upward around the adjusting rod 23, and the suspension arm 2 drives the connecting arm 22 connected to itself to rotate around the adjusting rod 23. During the rotation of the connecting arm 22, the arc spring 89 on both sides of itself is deformed. The arc spring 89 applies a force to the connecting arm 22 connected to itself to prevent the connecting arm 22 from tilting, thereby reducing the swing amplitude of the connecting arm 22, the suspension arm 2 and the pressure roller 4 when passing through the bumpy area, thereby reducing the damage caused by the pressure roller 4 repeatedly bouncing and hitting the ground. When the passing area is too bumpy, that is, the impact force generated by the pressure roller 4 hitting the ground is too large, and the pressure roller 4 bounces upward too much, the pressure roller 4 drives the suspension arms 2 on both sides and the connecting arms 22 connected to the corresponding suspension arms 2 to swing upward around the corresponding adjusting rod 23, and the amplitude also reaches the maximum. The connecting arm 22 drives the corresponding limiting arc disk 84 through the arc springs 89 on both sides of itself to generate a tendency to rotate around the adjusting rod 23. In this process, the positioning plates 81 on both sides of the limiting arc disk 84 squeeze the limiting balls 87, so that the limiting balls 87 slide into the limiting arc disk 84 along the length direction of the mounting groove 85 of the limiting arc disk 84, thereby making the limiting balls 87 move out of the positioning groove of the positioning plate 81, and then the limiting balls 87 no longer block the rotation of the limiting arc disk 84. At this time, under the pushing action of the connecting arm 22, the arc mouth of the limit arc disk 84 rotates around the adjusting rod 23 along the limit arc disk 84. As the limit arc disk 84 rotates, the limit balls 87 on both sides of the limit arc disk 84 are respectively stuck in the positioning grooves near the bottom of the positioning disk 81 along the height direction. Since the depth of the positioning grooves near the two sides of the positioning disk 81 along the height direction is greater than the depth of the positioning grooves near the middle position of the positioning disk 81 along the height direction, the clamping of the limit balls 87 is more secure, and the connecting arm 22 extends from the arc mouth of the limit arc disk 84. The limit arc disk 84 supports the connecting arm 22, thereby lifting the suspension arm 2 through the rotation of the connecting arm 22 around the adjusting rod 23, reducing the collision between the pressure roller 4 and the ground, thereby reducing the metal fatigue caused by the shear stress generated by the repeated impact of the pressure roller 4 at the connection position of the suspension arm 2 and the suspension beam 1, and protecting the suspension structure of the pressure roller 4.

[0051] The implementation principle of the suspension assembly of a power harrow pressing roller 4 in the embodiment of the present application is: when the user uses it, the user uses agricultural machinery to drive the pressing roller 4 to level and compact the soil, and is subjected to radial resistance of the soil layer along the pressing roller 4, and generates a vertical upward component force along the radial direction of the pressing roller 4. The first connecting frame 54 slides upward along the first guide rail 53, driving the connector 64 and the guide rod 63 to slide upward, and the guide rod 63 compresses the first shock-absorbing spring 62 in the cylinder 61. The first shock-absorbing spring 62 exerts a force on the guide rod 63 to make the guide rod 63 slide out of the cylinder 61. At the same time, the connector 64 pushes the second connecting frame 56 to slide along the second guide rail 55 away from the first guide rail 53 through the connecting rod 57, so that the support roller 58 connected to the second connecting frame 56 contacts the arc support frame 74, thereby pushing the two connecting rods 72 to slide in the mounting seat 71 away from the first guide rail 53, thereby compressing the corresponding second shock-absorbing spring 73. After the second shock-absorbing spring 73 is compressed, it exerts a force on the connecting rod 72 in the direction of the first guide rail 53. The cooperation of the first shock-absorbing mechanism 6 and the second shock-absorbing mechanism 7 improves the shock-absorbing effect on the pressing roller 4, so that the pressing roller 4 can more stably level the soil layer. When the pressure roller 4 is pressed against the obstacle and cannot pass over the obstacle, the upward support force on the pressure roller 4 reaches its maximum. At this time, the second shock-absorbing spring 73 is compressed to the maximum limit, and the connecting rod 72 contacts the travel switch 75 to turn on the travel switch 75. The travel switch 75 controls the hydraulic cylinder 59 to turn on, so that the hydraulic rod of the hydraulic cylinder 59 extends. The hydraulic rod of the hydraulic cylinder 59 drives the push roller 593 to push the driving roller in the connecting groove 592 of the driving roller. The driving roller drives the suspension turntable 51 to rotate around its own rotation center in the suspension arm 2, thereby driving the mounting assembly 3 and the pressure roller 4 to rotate around its rotation center with the suspension turntable 51. As the suspension turntable 51 rotates, the pressure roller 4 is lifted upward, so that the pressure roller 4 can pass over the obstacle, reducing the damage to the pressure roller 4 caused by the forced collision and squeezing of the pressure roller 4 to pass over the obstacle. When the pressure roller 4 passes through the bumpy area, the pressure roller 4 is impacted by the raised part of the ground, causing the pressure roller 4 to bounce upward, thereby driving the suspension arms 2 on both sides to swing upward around the adjusting rod 23. The suspension arm 2 drives the connecting arm 22 connected to itself to rotate around the adjusting rod 23. During the rotation of the connecting arm 22, the arc spring 89 on both sides of itself is deformed. The arc spring 89 applies a force to the connecting arm 22 connected to itself to prevent the connecting arm 22 from tilting, thereby reducing the swing amplitude of the connecting arm 22, the suspension arm 2 and the pressure roller 4 when passing through the bumpy area, thereby reducing the damage caused by the pressure roller 4 repeatedly bouncing and hitting the ground.When the passing area is too bumpy, that is, the impact force generated by the pressing roller 4 hitting the ground is too large, and the pressing roller 4 bounces upward too much, the pressing roller 4 drives the suspension arms 2 on both sides and the connecting arms 22 connected to the corresponding suspension arms 2 to swing upward around the corresponding adjusting rod 23. When the amplitude reaches the maximum, the connecting arm 22 drives the corresponding limiting arc disk 84 to rotate around the adjusting rod 23 through the arc springs 89 on both sides of itself. At this time, under the pushing action of the connecting arm 22, the arc mouth of the limiting arc disk 84 rotates around the adjusting rod 23 with the limiting arc disk 84. As the disk 84 rotates, the limiting balls 87 on both sides of the limiting arc disk 84 are respectively inserted into the positioning grooves close to the bottom of the positioning disk 81 in the height direction, and the connecting arm 22 extends from the arc mouth of the limiting arc disk 84. The limiting arc disk 84 supports the connecting arm 22, so that the suspension arm 2 is lifted by the rotation of the connecting arm 22 around the adjusting rod 23, reducing the collision between the pressure roller 4 and the ground, thereby reducing the metal fatigue caused by the shear stress generated by the repeated impact of the pressure roller 4 at the connection position of the suspension arm 2 and the suspension beam 1, and protecting the suspension structure of the pressure roller 4.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A power harrow press roller suspension assembly, comprising a suspension beam (1), a suspension arm (2) and a press roller (4), wherein both ends of the press roller (4) are connected to a mounting assembly (3), the press roller (4) is connected to the suspension arm (2) via the mounting assemblies (3) at both ends, and the suspension arm (2) is connected to the suspension beam (1), wherein: A first-level protection device (5) is provided between the installation assembly (3) and the suspension arm (2), and the first-level protection device (5) includes a suspension turntable (51), the suspension turntable (51) is connected to the suspension arm (2), and the installation assembly (3) is connected to the suspension turntable (51); when the pressure roller (4) works normally, the first-level protection device (5) applies a force to the pressure roller (4) to reduce the amplitude of the pressure roller (4); when the pressure roller (4) contacts an obstacle with a large resistance, the first-level protection device (5) rotates the suspension turntable (51) to drive the pressure roller (4) to tilt upward and pass over the obstacle; a second-level protection device (8) is provided between the suspension arm (2) and the suspension beam (1), and the second-level protection device (8) includes a connecting arm (22), the connecting arm (22) is connected to the suspension arm (2), and the second-level protection device (8) drives the connecting arm (22) to tilt so as to adjust the angle between the suspension arm (2) and the suspension beam (1) and thereby adjust the suspension height of the pressure roller (4); The first-level protection device (5) further comprises a first guide rail (53), the first guide rail (53) being connected to the suspension turntable (51) through a guide rail clamp (52), the first guide rail (53) being slidably provided with a first connecting frame (54), the first connecting frame (54) being capable of sliding along the first guide rail (53), the mounting assembly (3) being connected to the first connecting frame (54), the suspension turntable (51) being connected with a first shock absorbing mechanism (6) at a position corresponding to the first connecting frame (54), the first shock absorbing mechanism (6) applying a force along the length direction of the first guide rail (53) to the first connecting frame (54), the first shock absorbing mechanism (6) comprising a guide rod (63) and a cylinder (61), the guide rod (63) being slidably provided in the cylinder (61), one end of the guide rod (63) being located in the cylinder (61), the cylinder (61) being provided with a first shock absorbing spring (62), the first shock absorbing mechanism (63) and the first connecting frame (54 ... A damping spring (62) is coaxially arranged with the guide rod (63) in the axial direction. The first damping spring (62) is connected to one end of the guide rod (63) located inside the cylinder (61). The guide rod (63) is connected to a connector (64) at one end outside the cylinder (61). The connector (64) is connected to the first connecting frame (54). The hanging turntable (51) is also connected to a second guide rail (55). The length direction of the second guide rail (55) is perpendicular to the length direction of the first guide rail (53). The second guide rail (55) is slidably provided with a second connecting frame (56). The connector (64) is hinged to the second connecting frame (56) through a connecting rod (57). The second connecting frame (56) is also connected to a second damping mechanism (7). The second damping mechanism (7) applies a force to the second connecting frame (56) along the length direction of the second guide rail (55). The second shock absorbing mechanism (7) comprises a mounting seat (71) and a connecting rod (72) slidably mounted on the mounting seat (71); the mounting seat (71) is connected to the suspension arm (2); one end of the connecting rod (72) is connected to an arc-shaped support frame (74); the arc opening of the arc-shaped support frame (74) is arranged toward the second connecting frame (56); the second connecting frame (56) is connected to a support roller (58) at a position close to the arc-shaped support frame (74); the support roller (58) can rotate around its own axis, and the support roller (58) is arranged in contact with the arc-shaped support frame (74); the mounting seat (71) is connected to a second shock absorbing spring (73) at a position corresponding to the connecting rod (72) slidably mounted on itself; the second shock absorbing spring (73) applies a force to the connecting rod (72) to make the connecting rod (72) slide toward the support roller (58); the suspension turntable (51) is connected to A driving arm (591) is provided with a connecting groove (592) along its own length direction. A travel switch (75) is connected to the side of the mounting seat (71) away from the support roller (58). The connecting rod (72) can contact the travel switch (75). The travel switch (75) is connected to a hydraulic cylinder (59). The cylinder body of the hydraulic cylinder (59) is connected to the suspension arm (2). The hydraulic rod of the hydraulic cylinder (59) is connected to a push roller (593). The push roller (593) is slidably arranged in the connecting groove (592) of the driving arm (591). When the connecting rod (72) contacts the travel switch (75), the travel switch (75) is turned on. When the travel switch (75) is turned on, the hydraulic cylinder (59) pushes the driving arm (591) to drive the suspension turntable (51) to rotate.

2. The power harrow press roller suspension assembly according to claim 1, characterized in that: The secondary protection device (8) comprises a connecting arm (22) and two positioning discs (81), the two positioning discs (81) are both connected to the suspension beam (1), a limiting arc disc (84) is connected between the two positioning discs (81), the limiting arc disc (84) is in an arc shape, the connecting arm (22) is also connected between the two positioning discs (81), the connecting arm (22) is located in the arc opening of the limiting arc disc (84), one end of the connecting arm (22) is connected to the suspension arm (2), and the limiting arc disc (84) and the positioning disc (81) are coaxially arranged; a plurality of positioning grooves are provided on one side of the two positioning discs (81) close to each other, and mounting grooves (84) are provided on both sides of the limiting arc disc (84). 5), a limiting ball (87) is slidably provided in each mounting groove (85) of the limiting arc disk (84), and the limiting ball (87) can slide along the length direction of the mounting groove (85), and the limiting ball (87) can be clamped in the positioning groove of the positioning disk (81), and a limiting spring (86) is also provided in each mounting groove (85) of the limiting arc disk (84), and the limiting spring (86) applies a force to the limiting ball (87) to make the limiting ball (87) slide in the direction of the limiting arc disk (84), and the limiting arc disk (84) is connected to arc springs (89) at positions on both sides of the corresponding connecting arm (22), and each arc spring (89) is connected to the connecting arm (22).

3. The power harrow press roller suspension assembly according to claim 2, characterized in that: The multiple positioning grooves of each positioning plate (81) are arranged in a circular array around the axis of the corresponding positioning plate (81), and the depth of the positioning groove located in the middle position of the positioning plate (81) along the height direction is smaller than the depth of the positioning grooves located at the two sides of the positioning plate (81) along the height direction.

4. The power harrow press roller suspension assembly according to claim 3, characterized in that: The two positioning plates (81) of the secondary protection device (8) are slidably provided with an adjusting rod (23) together. The positioning plates (81) can slide along the length direction of the adjusting rod (23). The adjusting rod (23) is connected to the suspension beam (1). A bidirectional screw is threadedly connected between the two positioning plates (81). The threads on both sides of the bidirectional screw are arranged in opposite directions. The two positioning plates (81) are respectively located at the positions on both sides of the bidirectional screw. The rotation of the bidirectional screw can drive the two positioning plates (81) to slide in opposite directions.

5. The power harrow press roller suspension assembly according to claim 1, characterized in that: The suspension beam (1) is connected to an outer rod sleeve (15) on one side corresponding to the pressing roller (4); an inner rod (16) is slidably provided on the inner side of the outer rod sleeve (15); the inner rod (16) can slide along the length direction of the outer rod sleeve (15); the outer peripheral wall of the outer rod sleeve (15) is connected to a support block (17); one end of the inner rod (16) located outside the outer rod sleeve (15) is hingedly connected to a pressing plate (191); the pressing plate (191) contacts the ground to flatten the raised part of the ground.

6. The power harrow press roller suspension assembly according to claim 5, characterized in that: The pressure plate (191) is tilted from top to bottom in a direction away from the pressure roller (4), and a pressure plate (192) is fixed to the bottom of the pressure plate (191). The pressure plate (192) is tilted from bottom to top in a direction away from the pressure plate (191). A return spring (18) is connected to the position of the pressure plate (192) away from the pressure plate (191), and one end of the return spring (18) is connected to the support block (17). The return spring (18) applies a force to the pressure plate (192) to move it toward the support block (17). A plurality of mutually staggered elliptical protrusions are formed on the side of the pressure plate (192) away from the pressure plate (191).

7. The power harrow press roller suspension assembly according to claim 6, characterized in that: The outer rod sleeve (15) is connected to a fixing frame (14) at one end away from the pressing plate (191), and fixing bolts are connected to both sides of the fixing frame (14). The suspension beam (1) is fixedly connected to the connecting ear plates (12) at positions on both sides corresponding to the fixing frame (14), and each connecting ear plate (12) is provided with a plurality of fixing holes (13) along its own height direction, and the fixing bolts can be set through the fixing holes (13) of the connecting ear plates (12).

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