Depth adjusting mechanism of rice transplanter

Abstract

The utility model discloses a rice transplanter depth adjusting mechanism which comprises a cart, a pit digging mechanism is arranged on the cart, the pit digging mechanism comprises an eccentric wheel, a connecting rod, a supporting cylinder, a conical cylinder and an adjusting mechanism, and the adjusting mechanism comprises a fixing hole, a connecting block, an inserting rod, a clamping rod, a fixing sleeve, an inclined groove, an inclined block, a clamping block, a clamping groove, a sliding groove, a pressing ring, a sliding sleeve and a limiting mechanism. The multiple sets of fixing holes are distributed in the outer wall of the conical cylinder, great convenience is provided through optimization of the adjusting mechanism, especially on the rapidness of depth adjusting and the simplicity and convenience of fixing and dismounting, the pit digging depth adjusting process becomes simple and rapid through the design of inserting rods and the fixing holes, and the clamping connection rod and the clamping block are clamped, so that the pit digging depth adjusting process is more convenient and faster. The position of the conical barrel can be stably fixed, depth deviation in the operation process is prevented, in addition, the adjusting mechanism can easily relieve and fix the depth through cooperation of the sliding sleeve and the pressing ring, and the tedious process that in traditional equipment, complex dismounting and fixing need to be conducted is avoided.

Description

Technical Field

[0001] This utility model relates to the field of agricultural production technology, and more specifically, it relates to a depth adjustment mechanism for a rice transplanter. Background Technology

[0002] In agricultural production, especially in rice cultivation, accurate transplanting depth is crucial for crop growth. Traditional transplanting equipment often struggles to quickly adjust the pit depth, especially since the depth requirements may vary depending on different soil conditions or crop types. This makes it impossible for farmers to adjust the working depth of the equipment in a timely manner under different operating conditions, increasing the cumbersome operation process and lacking flexibility when switching between different plots, thus affecting cultivation efficiency.

[0003] In addition, existing rice transplanting equipment usually lacks the function of quick fixing and disassembly in terms of depth adjustment. This means that each depth adjustment requires a long time and the operation process is relatively complicated. For situations that require frequent adjustment of the working depth, traditional equipment often cannot provide enough convenience, resulting in unnecessary waste of time and increased labor. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, this utility model provides a rice transplanter depth adjustment mechanism to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a rice transplanter depth adjustment mechanism, comprising a trolley, on which a hole-opening mechanism is provided. The hole-opening mechanism includes an eccentric wheel, a connecting rod, a support cylinder, a cone cylinder, and an adjustment mechanism. The eccentric wheel rotates on the trolley, the connecting rod rotates on the outer wall of the eccentric wheel, the support cylinder is fixed to the top surface of the trolley, and the cone cylinder slides inside the support cylinder. The adjustment mechanism includes a fixing hole, a connecting block, an insert rod, a locking rod, a fixing sleeve, an inclined groove, an inclined block, a locking block, a locking groove, and a sliding groove. The device includes a pressure ring, a sliding sleeve, and a limiting mechanism. Multiple sets of fixing holes are distributed on the outer wall of the cone. The connecting block is fixed to the bottom end of the connecting rod. The insertion rod is inserted into the fixing hole. The snap-fit ​​rod is fixed to the top end of the insertion rod. The fixing sleeve is fixed to the top surface of the connecting block. Multiple sets of inclined grooves are distributed on the inner wall of the fixing sleeve. The inclined block slides in multiple sets of inclined grooves. The snap-fit ​​block is fixed to the inner side of the inclined block. Multiple sets of snap-fit ​​grooves are distributed on the outer wall of the snap-fit ​​rod. Multiple sets of sliding grooves are distributed on the outer wall of the fixing sleeve. The pressure ring slides in the sliding groove. The sliding sleeve is fixed to the outer wall of the pressure ring.

[0008] The present invention is further configured such that the limiting mechanism includes a support rod, a limiting block, a rotating sleeve, a limiting groove, an unlocking mechanism, and a positioning mechanism. Multiple sets of support rods are distributed on the bottom surface of the sliding sleeve, and the limiting blocks are fixed to the bottom ends of multiple sets of support rods. The rotating sleeve is rotatably installed on the outer wall of the fixed sleeve, and multiple sets of limiting grooves are distributed on the top surface of the rotating sleeve and slidably connected to multiple sets of limiting blocks. Through the design of the support rod and the limiting block, the depth adjustment between the rotating sleeve and the limiting groove can be carried out smoothly and stably, avoiding unnecessary depth deviation during operation.

[0009] The present invention is further configured such that the unlocking mechanism includes a push spring, a connecting plate, an arc-shaped slider, an annular groove, and an unlocking groove. Multiple sets of push springs are connected to the bottom surface of the sliding sleeve. The connecting plate is fixed to the bottom end of the multiple sets of push springs. The arc-shaped slider is fixed to the bottom surface of the multiple sets of connecting plates. The annular groove is located on the top surface of the rotating sleeve and is slidably connected to the multiple sets of arc-shaped sliders. The unlocking groove is located at one end of the multiple sets of limiting grooves. Through the cooperation of the push spring and the arc-shaped slider, the unlocking mechanism can effectively release the locked state during depth adjustment, which facilitates quick adjustment of the working depth and ensures a smooth and stable unlocking process.

[0010] The present invention is further configured such that the positioning mechanism includes a positioning sleeve, a compression spring, a positioning block, and a positioning groove. The positioning sleeve is fixed to the bottom surface of the rotating sleeve. Multiple sets of compression springs are distributed inside the positioning sleeve. The positioning block is connected to the bottom end of the multiple sets of compression springs. Multiple sets of positioning grooves are distributed on the outer wall of the fixed sleeve. The positioning mechanism, through the cooperation of the positioning block and the positioning groove, accurately ensures that the rotating sleeve maintains a stable depth position during the adjustment process, avoiding depth drift caused by misoperation or vibration.

[0011] The present invention is further configured such that a rotating rod is provided at the bottom of the trolley, and wheels are fixedly provided at both ends of the rotating rod. A transmission component is provided between the outer wall of the rotating rod and the outer wall of the eccentric wheel. The design of the rotating rod and the wheels allows the equipment to move more flexibly, while the combination of the eccentric wheel and the transmission component can precisely control the change in the rice planting depth, further improving the accuracy and efficiency of the operation.

[0012] The present invention is further configured such that a limiting block is provided on the outer wall of the snap-fit ​​rod, and a limiting hole is provided inside the fixing sleeve. The limiting block is inserted into the limiting hole and is configured as a polygon. The cooperative design of the limiting block and the limiting hole provides a more stable snap-fit ​​method, avoids loosening or misoperation during the depth adjustment process, and ensures the accuracy in operation.

[0013] The present invention is further provided that a reset spring is connected between the bottom surface of each of the multiple sets of inclined blocks and the fixed sleeve. The design of the reset spring ensures that the inclined blocks can automatically return to the initial position during the depth adjustment process, reducing the complexity of manual operation and improving the ease of operation and stability of the equipment.

[0014] The present invention is further configured such that a compression spring is connected to the inner wall of the fixed sleeve, and a pressure plate is connected to the bottom end of the compression spring. The design of the compression spring and the pressure plate effectively enhances the pressure adjustment function inside the fixed sleeve, so that a stable support force can be provided during the depth adjustment process, ensuring the stability of the position of each component and the consistency of the depth.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a rice transplanter depth adjustment mechanism, which has the following beneficial effects:

[0017] 1. By optimizing the design of the hole-opening mechanism, the accuracy of depth adjustment and operational efficiency have been significantly improved. During the hole-opening process, the eccentric wheel drives the connecting rod to rotate, which in turn causes the cone to slide inside the support cylinder, thereby effectively adjusting the depth of the planting hole. This design can adapt to different soil conditions and operational requirements, ensuring the stability and consistency of the planting depth, and reducing the problems caused by unstable depth in traditional equipment during operation. By driving the eccentric wheel to rotate through the transmission component, the displacement of the cone can be precisely controlled, further improving the overall accuracy of the operation.

[0018] 2. The optimized adjustment mechanism provides great convenience, especially in terms of the speed of depth adjustment and the ease of fixing and disassembling. The design of the insertion rod and fixing hole makes the process of adjusting the pit depth simple and fast. In addition, the locking design of the locking rod and the locking block can firmly fix the position of the cone and prevent depth deviation during operation. Furthermore, the adjustment mechanism can easily release and fix the depth through the cooperation of the sliding sleeve and the pressure ring, avoiding the cumbersome process of complex disassembly and fixing required in traditional equipment, and significantly improving work efficiency.

[0019] 3. The design of the limiting mechanism effectively ensures the precise positioning of each component and the safety of operation. Through the interaction of the limiting block and the rotating sleeve, the limiting mechanism ensures that the cone remains in the required position during the depth adjustment process, avoiding instability caused by over-adjustment or loosening. The engagement method between the positioning block and the positioning groove makes the positioning more accurate during the adjustment process. Furthermore, the design of the push spring and the return spring enables each component to automatically reset, reducing the complexity of manual operation. Overall, the limiting mechanism effectively ensures the accuracy of depth adjustment during operation and the long-term stable operation of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a rice transplanter depth adjustment mechanism according to the present invention;

[0021] Figure 2 This is a schematic diagram of the eccentric wheel in this utility model;

[0022] Figure 3 This is a cross-sectional view of the conical cylinder in this utility model;

[0023] Figure 4 This is a cross-sectional view of the fixing sleeve in this utility model;

[0024] Figure 5 This is a cross-sectional view of the positioning mechanism in this utility model.

[0025] Figure 6 This is a schematic diagram of the connecting rod in this utility model.

[0026] In the diagram: 1. Trolley; 2. Eccentric wheel; 3. Connecting rod; 4. Support cylinder; 5. Conical cylinder; 6. Fixing hole; 7. Connecting block; 8. Insert rod; 9. Snap-fit ​​rod; 10. Fixing sleeve; 11. Inclined groove; 12. Inclined block; 13. Snap-fit ​​block; 14. Snap-fit ​​groove; 15. Sliding groove; 16. Pressure ring; 17. Sliding sleeve; 18. Support rod; 19. Limiting block; 20. Rotating sleeve; 21. Limiting groove; 22. Push spring; 23. Connecting plate; 24. Arc-shaped slider; 25. Annular groove; 26. Unlocking groove; 27. Positioning sleeve; 28. Compression spring; 29. ​​Positioning block; 30. Positioning groove; 31. Rotating rod; 32. Wheel; 33. Transmission assembly; 34. Limiting block; 35. Limiting hole; 36. Reset spring; 37. Compression spring; 38. Pressure plate. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-6A rice transplanter depth adjustment mechanism includes a trolley 1 with a hole-opening mechanism. The hole-opening mechanism includes an eccentric wheel 2, a connecting rod 3, a support cylinder 4, a cone cylinder 5, and an adjustment mechanism. The eccentric wheel 2 rotates on the trolley 1, the connecting rod 3 rotates on the outer wall of the eccentric wheel 2, the support cylinder 4 is fixed to the top surface of the trolley 1, and the cone cylinder 5 slides within the support cylinder 4. The adjustment mechanism includes a fixing hole 6, a connecting block 7, an insert rod 8, a locking rod 9, a fixing sleeve 10, an inclined groove 11, an inclined block 12, a locking block 13, a locking groove 14, a sliding groove 15, a pressure ring 16, a sliding sleeve 17, and a limiting mechanism. Multiple sets of holes 6 are distributed on the outer wall of the cone cylinder 5. The connecting block 7 is fixed to the bottom end of the connecting rod 3. The insert rod 8 is inserted into the fixing hole 6. The snap-fit ​​rod 9 is fixed to the top end of the insert rod 8. The fixing sleeve 10 is fixed to the top surface of the connecting block 7. Multiple sets of inclined grooves 11 are distributed on the inner wall of the fixing sleeve 10. The inclined block 12 slides in the multiple sets of inclined grooves 11. The snap-fit ​​block 13 is fixed to the inner side of the inclined block 12. Multiple sets of snap-fit ​​grooves 14 are distributed on the outer wall of the snap-fit ​​rod 9. Multiple sets of sliding grooves 15 are distributed on the outer wall of the fixing sleeve 10. The pressure ring 16 slides in the sliding groove 15. The sliding sleeve 17 is fixed on the outer wall of the pressure ring 16.

[0031] The limiting mechanism includes a support rod 18, a limiting block 19, a rotating sleeve 20, a limiting groove 21, an unlocking mechanism, and a positioning mechanism. Multiple sets of support rods 18 are distributed on the bottom surface of the sliding sleeve 17. The limiting block 19 is fixed to the bottom end of multiple sets of support rods 18. The rotating sleeve 20 is rotatably mounted on the outer wall of the fixed sleeve 10. Multiple sets of limiting grooves 21 are distributed on the top surface of the rotating sleeve 20 and are slidably connected to multiple sets of limiting blocks 19. The combination of support rods 18 and limiting blocks 19 ensures that the rotating sleeve 20 is restricted during adjustment. The sliding connection between the limiting groove 21 and the limiting block 19 ensures the depth adjustment accuracy of the rotating sleeve and avoids errors during the depth adjustment process.

[0032] The unlocking mechanism includes a push spring 22, a connecting plate 23, an arc-shaped slider 24, an annular groove 25, and an unlocking groove 26. Multiple sets of push springs 22 are connected to the bottom surface of the sliding sleeve 17. The connecting plate 23 is fixed to the bottom end of the multiple sets of push springs 22. The arc-shaped slider 24 is fixed to the bottom surface of the multiple sets of connecting plates 23. The annular groove 25 is located on the top surface of the rotating sleeve 20 and is slidably connected to the multiple sets of arc-shaped sliders 24. The unlocking groove 26 is located at one end of the multiple sets of limiting grooves 21. The design of the push spring 22 and the arc-shaped slider 24 allows the unlocking process to be completed by sliding through the annular groove 25. When unlocking is performed, the push spring 22 provides the necessary restoring force to ensure a smooth unlocking process, release the restriction of the rotating sleeve 20, and facilitate depth adjustment.

[0033] The positioning mechanism includes a positioning sleeve 27, a compression spring 28, a positioning block 29, and a positioning groove 30. The positioning sleeve 27 is fixed to the bottom surface of the rotating sleeve 20. Multiple sets of compression springs 28 are distributed inside the positioning sleeve 27. The positioning block 29 is connected to the bottom end of the multiple sets of compression springs 28. Multiple sets of positioning grooves 30 are distributed on the outer wall of the fixed sleeve 10. The positioning mechanism ensures that the rotating sleeve 20 can be accurately fixed in the target position after each adjustment through the elastic action of the compression springs 28 and the positioning blocks 29. The cooperation between the positioning grooves 30 and the positioning blocks 29 effectively avoids depth errors and improves the stability of adjustment.

[0034] The bottom of the trolley 1 is equipped with a rotating rod 31, and wheels 32 are fixed at both ends of the rotating rod 31. A transmission component 33 is connected between the outer wall of the rotating rod 31 and the outer wall of the eccentric wheel 2. The design of the rotating rod 31 and the wheels 32 allows the trolley 1 to move flexibly. The cooperation between the eccentric wheel 2 and the transmission component 33 adjusts the depth through eccentric rotation, thereby achieving precise depth adjustment and control, and improving the flexibility and accuracy of equipment operation.

[0035] The outer wall of the snap-fit ​​rod 9 is provided with a limiting block 34, and the fixing sleeve 10 is provided with a limiting hole 35. The limiting block 34 is inserted into the limiting hole 35 and is set as a polygon. The limiting block 34 and the limiting hole 35 enhance the connection stability between the snap-fit ​​rod 9 and the fixing sleeve 10 through the cooperation of the polygonal structure, prevent the depth adjustment position from shifting due to external force interference, and ensure the accuracy of depth adjustment.

[0036] Each of the multiple sets of inclined blocks 12 is connected to a reset spring 36 between its bottom surface and the fixed sleeve 10. The reset spring 36 provides elastic force so that the inclined block 12 can automatically return to its initial position during the depth adjustment process, which simplifies the operation, ensures the stability during the adjustment process, and prevents unnecessary displacement of the components.

[0037] A compression spring 37 is connected to the inner wall of the fixed sleeve 10, and a pressure plate 38 is connected to the bottom end of the compression spring 37. The design of the compression spring 37 and the pressure plate 38 provides an additional pressure adjustment function. After the depth adjustment is completed, the compression spring 37 can maintain appropriate pressure, so that the components inside the fixed sleeve 10 always remain stable and avoid position changes due to vibration or external force.

[0038] In this embodiment, when it is necessary to adjust the depth of the planting hole, the mounting block is moved to the outside of the fixing hole 6 at the specified height, and then the insertion rod 8 is inserted into the fixing hole 6. At the same time, the locking rod 9 is inserted into the fixing sleeve 10. Then, the sliding sleeve 17 is pushed to slide along the sliding groove 15, which drives the pressure ring 16 to push multiple sets of locking blocks 13. The multiple sets of locking blocks 13 slide along the inclined groove 11 through the inclined block 12 and push the locking blocks 13 to engage in the locking groove 14 and squeeze the return spring 36. At the same time, the sliding sleeve 17 pushes the limiting block 19 to move into the unlocking groove 26 and squeezes the multiple sets of push springs 2. 2. Extrusion is performed, and then the rotating sleeve 20 is rotated so that multiple sets of limiting blocks 19 slide into the limiting groove 21. Multiple sets of push springs 22 push the positioning block 29 to engage in the positioning groove 30 to position the rotating sleeve 20. The limiting block 19 limits the sliding sleeve 17, thus completing the fixation of the connecting rod 3 and the cone 5. Then, the trolley 1 is pushed, and the wheel 32 drives the rotating rod 31 to rotate. The rotating rod 31 drives the eccentric wheel 2 to rotate through the transmission assembly 33. The eccentric wheel 2 drives the connecting rod 3 to rotate. The connecting rod 3 pulls the cone 5 to slide along the support cylinder 4 and open a pit in the soil.

[0039] More specifically, when adjustment is required again, force is applied to rotate the rotating sleeve 20, causing the outer wall of the positioning groove 30 to push the positioning block 29 outward to squeeze the compression spring 28. When it moves to the next set of positioning grooves 30, the compression spring 28 pushes the positioning block 29 to engage again in the positioning groove 30. Continuing to rotate, the limiting block 19 moves into the unlocking groove 26 and releases the limiting of the sliding sleeve 17. Multiple sets of push springs 22 push the sliding sleeve 17 to slide along the sliding groove 15, causing the pressure ring 16 to release its contact with the multiple sets of locking blocks 13. Multiple sets of reset springs 36 push the inclined block 12 to slide along the inclined groove 11, pushing the multiple sets of locking blocks 13 to disengage from the locking groove 14 along the relief groove, releasing the locking of the locking rod 9. The compression spring 37 resets and pushes the pressure plate 38, and the pressure plate 38 pushes the locking rod 9 and the insertion rod 8 to pop out of the fixing hole 6, releasing the fixing of the cone cylinder 5.

[0040] In summary, when the overall equipment is in use or operation: when it is necessary to adjust the planting hole depth, move the mounting block to the outside of the fixed hole 6 at the specified height, then insert the insertion rod 8 into the fixed hole 6, and simultaneously insert the locking rod 9 into the fixed sleeve 10. Then, push the sliding sleeve 17 to slide along the sliding groove 15, causing the pressure ring 16 to push multiple sets of locking blocks 13. The multiple sets of locking blocks 13 slide along the inclined groove 11 through the inclined block 12 and push the locking blocks 13 to engage in the locking groove 14, thus squeezing the return spring 36. At the same time, the sliding sleeve 17 pushes the limiting block 19 to move into the unlocking groove 26 and... Multiple sets of push springs 22 compress the rotating sleeve 20, and then the rotating sleeve 20 is rotated so that multiple sets of limiting blocks 19 slide into the limiting groove 21. The multiple sets of push springs 22 push the positioning block 29 to engage in the positioning groove 30 to position the rotating sleeve 20. The limiting block 19 limits the sliding sleeve 17, thus completing the fixation of the connecting rod 3 and the cone 5. Then the trolley 1 is pushed, and the wheel 32 drives the rotating rod 31 to rotate. The rotating rod 31 drives the eccentric wheel 2 to rotate through the transmission component 33. The eccentric wheel 2 drives the connecting rod 3 to rotate. The connecting rod 3 pulls the cone 5 to slide along the support cylinder 4 and open a pit in the soil.

[0041] When adjustment is required again, force is applied to rotate the rotating sleeve 20, causing the outer wall of the positioning groove 30 to push the positioning block 29 outward to squeeze the compression spring 28. When it moves to the next set of positioning grooves 30, the compression spring 28 pushes the positioning block 29 to engage again in the positioning groove 30. Continuing to rotate, the limiting block 19 moves into the unlocking groove 26 and releases the limiting of the sliding sleeve 17. Multiple sets of push springs 22 push the sliding sleeve 17 to slide along the sliding groove 15, causing the pressure ring 16 to release its contact with the multiple sets of locking blocks 13. Multiple sets of reset springs 36 push the inclined block 12 to slide along the inclined groove 11, pushing the multiple sets of locking blocks 13 to disengage from the locking groove 14 along the relief groove, releasing the locking of the locking rod 9. The compression spring 37 resets and pushes the pressure plate 38, and the pressure plate 38 pushes the locking rod 9 and the insertion rod 8 to pop out of the fixing hole 6, releasing the fixing of the cone cylinder 5.

[0042] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rice transplanter depth adjustment mechanism, comprising a trolley (1), characterized in that: The trolley (1) is equipped with a pit-opening mechanism, which includes an eccentric wheel (2), a connecting rod (3), a support cylinder (4), a cone cylinder (5), and an adjustment mechanism. The eccentric wheel (2) rotates on the trolley (1), the connecting rod (3) rotates on the outer wall of the eccentric wheel (2), the support cylinder (4) is fixed on the top surface of the trolley (1), and the cone cylinder (5) slides inside the support cylinder (4). The adjustment mechanism includes a fixing hole (6), a connecting block (7), an insert rod (8), a snap-fit ​​rod (9), a fixing sleeve (10), an inclined groove (11), an inclined block (12), a snap-fit ​​block (13), a snap-fit ​​groove (14), a sliding groove (15), a pressure ring (16), a sliding sleeve (17), and a limiting mechanism. The fixing hole (6) is equipped with a... Multiple sets are distributed on the outer wall of the cone (5), the connecting block (7) is fixed at the bottom of the connecting rod (3), the insert rod (8) is inserted into the fixing hole (6), the snap rod (9) is fixed at the top of the insert rod (8), the fixing sleeve (10) is fixed on the top surface of the connecting block (7), the inclined groove (11) is provided with multiple sets distributed on the inner wall of the fixing sleeve (10), the inclined block (12) slides in multiple sets of inclined grooves (11), the snap block (13) is fixed on the inner side of the inclined block (12), the snap groove (14) is provided with multiple sets distributed on the outer wall of the snap rod (9), the sliding groove (15) is provided with multiple sets distributed on the outer wall of the fixing sleeve (10), the pressure ring (16) slides in the sliding groove (15), and the sliding sleeve (17) is fixed on the outer wall of the pressure ring (16).

2. The rice transplanter depth adjustment mechanism according to claim 1, characterized in that: The limiting mechanism includes a support rod (18), a limiting block (19), a rotating sleeve (20), a limiting groove (21), an unlocking mechanism, and a positioning mechanism. The support rod (18) is provided in multiple sets distributed on the bottom surface of the sliding sleeve (17). The limiting block (19) is fixed to the bottom end of the multiple sets of support rods (18). The rotating sleeve (20) is rotatably installed on the outer wall of the fixed sleeve (10). The limiting groove (21) is provided in multiple sets distributed on the top surface of the rotating sleeve (20) and slidably connected to the multiple sets of limiting blocks (19).

3. The rice transplanter depth adjustment mechanism according to claim 2, characterized in that: The unlocking mechanism includes a push spring (22), a connecting plate (23), an arc-shaped slider (24), an annular groove (25), and an unlocking groove (26). The push spring (22) is provided with multiple sets connected to the bottom surface of the sliding sleeve (17). The connecting plate (23) is fixed to the bottom end of the multiple sets of push springs (22). The arc-shaped slider (24) is fixed to the bottom surface of the multiple sets of connecting plates (23). The annular groove (25) is provided on the top surface of the rotating sleeve (20) and is slidably connected to the multiple sets of arc-shaped sliders (24). The unlocking groove (26) is provided at one end of the multiple sets of limiting grooves (21).

4. The rice transplanter depth adjustment mechanism according to claim 3, characterized in that: The positioning mechanism includes a positioning sleeve (27), a compression spring (28), a positioning block (29), and a positioning groove (30). The positioning sleeve (27) is fixed on the bottom surface of the rotating sleeve (20). Multiple sets of compression springs (28) are provided on the inner side of the positioning sleeve (27). The positioning block (29) is connected to the bottom end of the multiple sets of compression springs (28). Multiple sets of positioning grooves (30) are provided on the outer wall of the fixed sleeve (10).

5. The rice transplanter depth adjustment mechanism according to claim 4, characterized in that: The trolley (1) has a rotating rod (31) at the bottom, and wheels (32) are fixed at both ends of the rotating rod (31). A transmission assembly (33) is connected between the outer wall of the rotating rod (31) and the outer wall of the eccentric wheel (2).

6. The rice transplanter depth adjustment mechanism according to claim 5, characterized in that: The outer wall of the snap-fit ​​rod (9) is provided with a limiting block (34), and the fixing sleeve (10) is provided with a limiting hole (35). The limiting block (34) is inserted into the limiting hole (35) and is set as a polygon.

7. The rice transplanter depth adjustment mechanism according to claim 6, characterized in that: multiple sets of... A return spring (36) is provided between the bottom surface of the inclined block (12) and the fixed sleeve (10).

8. The rice transplanter depth adjustment mechanism according to claim 7, characterized in that: The inner wall of the fixed sleeve (10) is connected to a compression spring (37), and the bottom end of the compression spring (37) is connected to a pressure plate (38).

Images