Locking structure of a disc harrow

Abstract

The utility model relates to the technical field of agricultural machinery, and concretely relates to a locking structure of disc harrow. It includes main fixed frame and mounting bracket, the main fixed frame is connected with mounting bracket rotation, the one end of mounting bracket rotation is provided with land roller, a plurality of even distribution's locking mechanism is arranged between the main fixed frame and mounting bracket, the locking mechanism includes mounting plate, hydraulic rod and limit piece. The device is through setting the limit piece in locking mechanism and adjusting bolt cooperation, after hydraulic rod adjustment land roller into the ground angle, utilizes the limit piece and abuts between mounting plate and hydraulic rod, forms rigid limit, effectively disperses the reaction force that land roller suffered in the process of ploughing, avoids the inside hydraulic pressure of hydraulic rod long -term bears too big pressure and damages, and adopts multiple flexible adjustable limit piece and the cooperation of screw hole and adjusting bolt, has realized the multistage or stepless adjustment of land roller into the ground angle, satisfies the demand of different ploughing scene.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and more specifically, to a locking structure for a disc rake. Background Technology

[0002] A disc harrow is an agricultural machine that uses a rolling concave disc to cut into the soil, severing grass roots and crop residues, and turning over soil clods to loosen, break up, and level the land. It can also mix surface fertilizers or pesticides with the topsoil and can be used for stubble removal and seed covering.

[0003] Existing disc harrows require hydraulic rods and other devices to adjust the entry angle of their front tillage rollers before tilling to suit different tillage needs. However, existing devices typically lock the tillage roller's angle directly through hydraulic pressure within the hydraulic rod after adjusting the entry angle. During tilling, the tillage roller experiences a strong reaction force from the ground. After prolonged use, this reaction force causes the roller to push the extension end of the hydraulic rod in the opposite direction, leading to excessive hydraulic pressure and potential damage. Once damaged, the internal hydraulic pressure becomes unstable, causing the hydraulic rod to lose its locking function on the tillage roller's entry angle. Consequently, the tillage roller's angle changes with the ground during tilling, resulting in suboptimal tillage performance. Utility Model Content

[0004] This utility model provides a locking structure for a disc rake, which solves the problems in the background art mentioned above, namely: Traditional devices rely solely on hydraulic rods to lock the grounding roller's entry angle. After prolonged operation, the hydraulic rods may become damaged, losing their locking effect on the grounding roller and resulting in unsatisfactory tillage results.

[0005] To achieve the above objectives, the locking structure of the disc rake includes a main fixing frame and a mounting frame. The main fixing frame and the mounting frame are rotatably connected. A leveling roller is rotatably mounted on one end of the mounting frame. Multiple evenly distributed locking mechanisms are provided between the main fixing frame and the mounting frame. Each locking mechanism includes a mounting plate, a hydraulic rod, and a limiting plate.

[0006] In the above technical solution, the locking mechanism drives the mounting frame to rotate via a hydraulic rod to adjust the entry angle of the tillage roller. After the adjustment is completed, the locking mechanism can also limit the hydraulic rod via a limiting plate, thereby locking the entry angle of the tillage roller during tillage. Specifically, the hydraulic rod is fixedly connected to one end of the mounting plate, and a second mounting block is fixedly connected to the other end of the mounting plate. Multiple connecting plates are fixedly connected to the top of the mounting frame, and the second mounting block is rotatably connected to the connecting plates. A threaded hole is provided through the top of the mounting plate, and an adjusting bolt is threaded into the inside of the threaded hole. A limiting plate is rotatably disposed outside the adjusting bolt, and one side of the limiting plate engages with the telescopic end of the hydraulic rod. The limiting plate is positioned between the mounting plate and the hydraulic rod. A fixing pin is slidably connected through the bottom of the adjusting bolt. By employing multiple flexibly adjustable limit plates and the combination of threaded holes and adjusting bolts, the angle of the tillage roller entering the ground can be adjusted in multiple stages or steplessly to meet the needs of different farmland scenarios.

[0007] Based on this, multiple limiting plates are provided. After the hydraulic rod extends or retracts, an appropriate number of limiting plates can be inserted into the gap between the mounting plate and the hydraulic rod according to the length of the extension end of the hydraulic rod. In conjunction with adjusting the depth of the bolt entering the threaded hole, stepless locking of the angle of the leveling roller can be achieved. By increasing or decreasing the number of limit plates or adjusting the screw-in depth of the adjusting bolts, the extension length of the hydraulic rod can be precisely matched, achieving stepless locking of the hydraulic rod.

[0008] In another technical solution, the other end of the hydraulic rod is rotatably connected to a mounting block, which is fixedly connected to the main fixing frame. The connecting plate is used to fix the various frame rods in the mounting frame, thereby dispersing the stress on the mounting frame during the adjustment of the leveling roller angle.

[0009] In this technical solution, the rotating connection design between the connecting plate and the second mounting block, and the fixed connection structure between the first mounting block and the main fixing frame, evenly transfer stress to each support rod of the mounting frame, significantly improving the fatigue resistance and stability of the structure and extending the service life of the hydraulic rod and the overall device.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In the locking structure of this disc rake, by setting a limiting plate in the locking mechanism to cooperate with the adjusting bolt, after the hydraulic rod adjusts the angle of the tillage roller entering the ground, the limiting plate abuts against the mounting plate and the hydraulic rod to form a rigid limit, which effectively disperses the reaction force on the tillage roller during the tillage process and avoids damage to the hydraulic fluid inside the hydraulic rod due to long-term excessive pressure.

[0011] 2. The locking structure of this disc rake uses multiple flexibly adjustable limiting plates and the cooperation of threaded holes and adjusting bolts to achieve multi-level or stepless adjustment of the field roller's entry angle, meeting the needs of different farmland scenarios. By increasing or decreasing the number of limiting plates or adjusting the screw-in depth of the adjusting bolts, the extension length of the hydraulic rod can be precisely matched to ensure no gap offset after locking.

[0012] 3. In the locking structure of the disc rake, the rotating connection design between the connecting plate and the second mounting block, and the fixed connection structure between the first mounting block and the main fixed frame, evenly transmit stress to each frame rod of the mounting frame, significantly improving the fatigue resistance and stability of the structure, and extending the service life of the hydraulic rod and the overall device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a right view of the overall structure of this utility model; Figure 3 This utility model Figure 1 Enlarged schematic diagram of the structure at point A; Figure 4 This is a schematic diagram showing the disassembled structure of the locking mechanism in this utility model.

[0014] The meanings of the labels in the diagram are as follows: 1. Main mounting bracket; 2. Mounting bracket; 21. Connecting plate; 3. Locking mechanism; 31. Mounting plate; 32. Hydraulic rod; 321. Mounting block No. 1; 33. Mounting block No. 2; 331. Threaded hole; 34. Adjusting bolt; 35. Limiting plate; 36. Fixing pin. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Currently, traditional tillage devices rely solely on hydraulic rods to lock the tillage roller's entry angle. However, prolonged operation can damage the hydraulic rods, causing them to lose their locking effect and resulting in unsatisfactory tillage performance. This invention provides a locking structure for a disc harrow, see [link to related documentation]. Figure 1 and Figure 2 As shown, it includes a main fixing frame 1 and a mounting frame 2. The main fixing frame 1 and the mounting frame 2 are rotatably connected. A leveling roller is rotatably installed at one end of the mounting frame 2. Multiple locking mechanisms 3 are provided between the main fixing frame 1 and the mounting frame 2. The locking mechanisms 3 are used to drive the mounting frame 2 to rotate to adjust the grounding roller's entry angle. After the adjustment is completed, the locking mechanisms 3 can also lock the angle of the mounting frame 2 to prevent the mounting frame 2 from shifting its angle due to the reaction force of the leveling roller and the ground during the grounding process.

[0017] For implementation, see Figure 3 As shown, the locking mechanism 3 includes a mounting plate 31. A hydraulic rod 32 is fixedly connected to one end of the mounting plate 31, and a second mounting block 33 is fixedly connected to the other end of the mounting plate 31. Multiple connecting plates 21 are fixedly connected to the top of the mounting frame 2. The connecting plates 21 are rotatably connected to the second mounting block 33. When the hydraulic rod 32 extends, its telescopic end pushes the mounting plate 31 and the second mounting block 33 to move. Through the rotational cooperation of the connecting plates 21 and the second mounting block 33, the linear movement is converted into rotation, thereby causing the mounting frame 2 and the leveling roller to rotate toward the ground, thus realizing the adjustment of the grounding roller's entry angle. On the other hand, the other end of the hydraulic rod 32 is rotatably connected to the first mounting block 321. The first mounting block 321 is fixedly connected to the main fixing frame 1. The connecting plate 21 is used to fix the frame rods in the mounting frame 2. By setting the first mounting block 321 and the connecting plate 21, the driving force of the hydraulic rod 32 can be evenly distributed on each frame rod of the mounting frame 2, thereby avoiding excessive stress concentration on the surface of the mounting frame 2 when adjusting the angle of the leveling roller.

[0018] In addition, after the angle adjustment is completed, the angle of the leveling roller needs to be locked. At this time, you can refer to... Figure 4 As shown, a threaded hole 331 is provided through the top of the mounting plate 31. An adjusting bolt 34 is threadedly connected inside the threaded hole 331. A limiting piece 35 is rotatably connected to the outside of the adjusting bolt 34. One side of the limiting piece 35 can engage with the telescopic end of the hydraulic rod 32. By abutting itself between the hydraulic rod 32 and the mounting plate 31, when the leveling roller rotates upward due to the reaction force of the ground, the limiting piece 35 can prevent the mounting plate 31 from moving, thereby preventing the leveling roller from rotating upward and achieving the locking effect of the leveling roller angle. Furthermore, multiple limiting plates 35 are provided. After the hydraulic rod 32 extends and fixes the angle of the leveling roller, the user can rotate an appropriate number of limiting plates 35 on the adjusting bolt 34 and insert them between the mounting plate 31 and the hydraulic rod 32 according to the extension length of the hydraulic rod 32, so as to realize multi-level adjustment of the angle of the leveling roller. Moreover, by changing the depth of the adjusting bolt 34 entering the threaded hole 331, the extension length of the hydraulic rod 32 can be matched more precisely with the limiting plates 35, so as to realize stepless adjustment of the angle of the leveling roller.

[0019] Furthermore, a fixing pin 36 is slidably connected through the bottom of the adjusting bolt 34. The fixing pin 36 is used to limit the bottom position of the limiting piece 35 to prevent the limiting piece 35 from falling off the bottom of the adjusting bolt 34. When it is necessary to remove the adjusting bolt 34 and the limiting piece 35, the user can release the limiting of the bottom of the limiting piece 35 by pulling out the fixing pin 36, and then the user can remove the limiting piece 35 from the adjusting bolt 34.

[0020] The working principle of this device is as follows: When the user needs to adjust the grounding roller's entry angle, the user first activates multiple hydraulic rods 32, which, together with mounting block 33 and connecting plate 21, drive mounting frame 2 to move the grounding roller closer to or further away from the ground until the grounding roller is adjusted to the appropriate position. At this time, the user closes multiple hydraulic rods 32, and the bottom of the grounding roller is placed on the ground. Then, according to the extension length of the extended end of the hydraulic rod 32, the user manually turns the limiting plate 35 until the limiting plate 35 engages with the telescopic end of the hydraulic rod 32. If there is still a gap between the engaged limiting plate 35 and mounting plate 31 or hydraulic rod 32, and the gap cannot accommodate another limiting plate 35, the user can turn the adjusting bolt 34 to change its depth into the threaded hole 331 until the gap is increased to just accommodate one limiting plate 35. Finally, the user inserts the last accommodating limiting plate 35 into the gap and engages it with the telescopic end of the hydraulic rod 32 to lock the grounding roller's entry angle.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A locking structure for a disc rake, comprising a main fixing frame (1) and a mounting frame (2), wherein the main fixing frame (1) and the mounting frame (2) are rotatably connected, and a leveling roller is rotatably disposed at one end of the mounting frame (2), characterized in that: Multiple evenly distributed locking mechanisms (3) are provided between the main fixing frame (1) and the mounting frame (2). The locking mechanism (3) includes a mounting plate (31), a hydraulic rod (32) and a limiting piece (35). The locking mechanism (3) drives the mounting frame (2) to rotate via the hydraulic rod (32) to adjust the entry angle of the tillage roller. After the adjustment is completed, the locking mechanism (3) can also limit the hydraulic rod (32) via the limiting piece (35) to lock the entry angle of the tillage roller during the tillage process.

2. The locking structure of the disc rake according to claim 1, characterized in that: The hydraulic rod (32) is fixedly connected to one end of the mounting plate (31), and the other end of the mounting plate (31) is fixedly connected to the second mounting block (33). The top of the mounting frame (2) is fixedly connected to multiple connecting plates (21), and the second mounting block (33) is rotatably connected to the connecting plate (21).

3. The locking structure of the disc rake according to claim 2, characterized in that: The other end of the hydraulic rod (32) is rotatably connected to a first mounting block (321), which is fixedly connected to the main fixing frame (1). The connecting plate (21) is used to fix each frame rod in the mounting frame (2), thereby dispersing the stress on the mounting frame (2) during the adjustment of the ground roller angle.

4. The locking structure of the disc rake according to claim 3, characterized in that: The top of the mounting plate (31) has a threaded hole (331) through which an adjusting bolt (34) is threaded.

5. The locking structure of the disc rake according to claim 4, characterized in that: The limiting piece (35) is rotatably disposed outside the adjusting bolt (34), and one side of the limiting piece (35) is engaged with the telescopic end of the hydraulic rod (32). The limiting piece (35) is disposed between the mounting plate (31) and the hydraulic rod (32).

6. The locking structure of the disc rake according to claim 5, characterized in that: Multiple limiting plates (35) are provided. After the hydraulic rod (32) extends and retracts, an appropriate number of limiting plates (35) can be inserted into the gap between the mounting plate (31) and the hydraulic rod (32) according to the length of the extension end of the hydraulic rod (32). The depth of the adjusting bolt (34) entering the threaded hole (331) is adjusted to achieve stepless locking of the angle of the leveling roller.

7. The locking structure of the disc rake according to claim 4, characterized in that: The bottom of the adjusting bolt (34) is slidably connected to a fixing pin (36).

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