Variable spacing semi-automatic transplanter

Abstract

The application relates to a variable-distance semi-automatic transplanting machine, belonging to the technical field of agricultural machinery, which comprises a frame, a seat assembly, a rear wheel assembly, a front wheel assembly, a track assembly, a power assembly, a driving assembly, a planting mechanism and a seedling tray mechanism. The seat assembly comprises a seat and a seat support, the seat support comprises a lower seat support and a seat transverse support, the rear wheel assembly is arranged below the seat transverse support, the distal end of the seat transverse support is rotationally connected with the frame, when the frame is flipped over relative to the seat transverse support, the rear wheel of the rear wheel assembly can just contact the ground to form support, and the track assembly is formed to be suspended, the seat and the lower seat support jointly form a same flipping force arm, and the planting mechanism is provided with a planting frame stabilizer. Through specific design, on one hand, the wheel track can be adjusted at any position and at any time; on the other hand, the stabilizer weakens the impact load of the crank, so that the planting movement is stable, accurate and reliable, and the semi-automation of the planting operation is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and in particular to a variable-distance semi-automatic transplanter. Background Art

[0002] Transplanting is a crucial step in the growth process of many crops. Due to the high volume of some crops, the intensity of transplanting operations also increases. Currently, manual tobacco transplanting is labor-intensive and has low efficiency, high labor intensity, and poor transplanting quality.

[0003] To improve work efficiency and reduce the intensity of transplanting operations, transplanting machines have gradually emerged. However, existing transplanting machines can generally only complete part of the work, and many transplanting machines cannot adjust the ridge spacing, transplanting distance, planting depth, etc., and have poor terrain adaptability.

[0004] At the same time, the existing transplantation operation is implemented by a crank mechanism, which balances the unevenness of movement generated during the movement by adjusting the weight of the counterweight. This method is affected by the crank speed. If the speed is too high, the weight of the counterweight needs to be readjusted. The method of use has limitations and is inconvenient to replace. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a variable-distance semi-automatic transplanter to at least partially solve the problems mentioned in the above background technology.

[0006] The present invention is achieved through the following technical solutions:

[0007] A variable-distance semi-automatic transplanter includes a frame, a seat assembly, a rear wheel assembly, a front wheel assembly, a crawler assembly, a power assembly, a drive assembly, a planting mechanism, and a seedling tray mechanism. The characteristics are as follows: the seat assembly includes a seat and a seat bracket, the seat bracket includes a seat lower bracket and a seat cross bracket vertically connected to the seat lower bracket, the rear wheel assembly is arranged below the proximal end of the seat cross bracket connected to the seat lower bracket, the distal end of the seat cross bracket is rotatably connected to the frame, and when the rear wheel of the rear wheel assembly is flipped relative to the frame, the rear wheel of the rear wheel assembly is just It can contact the ground to form support and make the track assembly suspended. The seat and the bracket under the seat together constitute the same flipping force arm. The track assembly includes two tracks whose spacing is adjusted by a distance adjuster. The power assembly includes a generator, a battery, a motor and a hydraulic cylinder. The generator is fixed on the frame and is connected to the battery, the motor and the hydraulic motor. The motor provides power to the reducer through a sprocket. The lower end of the hydraulic cylinder is fixed on the frame, and the upper end is fixed on the lifting frame column. The planting mechanism and the seedling tray mechanism are fixed on the lifting frame. The planting mechanism is provided with a planting frame stabilizer for stabilizing the planting movement.

[0008] Furthermore, the planting mechanism includes a transmission shaft, a planting frame, a crank, a movable frame, a shovel, a fixed plate, a duckbill piece and a spring. The planting frame is fixed on the lifting frame and rises and falls with the lifting frame.

[0009] Furthermore, the planting frame stabilizer includes a pressure wheel coaxially arranged with the crank shaft and a pressure belt slidably sleeved on the pressure wheel. Both ends of the pressure belt are fixed to the frame, and at least one end is provided with an adjustment mechanism for adjusting the pressure of the pressure belt.

[0010] Furthermore, the adjustment mechanism includes a fixed seat, a pulley, a driving motor, a driving pulley and a driven pulley. The pulley is provided with a pressure belt winding groove. The fixed seat is fixed to the frame by bolts. A pulley shaft and a driving shaft are provided through the fixed seat. One end of the pulley shaft is fixed to the pulley, and the other end is fixed to the driven pulley. One end of the driving shaft is fixed to the output shaft of the driving motor, and the other end is fixed to the driving pulley. The driving pulley and the driven wheel are driven by gear meshing.

[0011] Furthermore, the frame is fixed with a vertical fixing ear, and the vertical fixing ear is provided with a pin hole. The lower end of the seat lower bracket is inserted into the pin hole through a horizontal fixing pin to form a detachable fixation with the frame, and the seat cross bracket is rotatably connected to the frame through the vertical fixing pin.

[0012] Furthermore, the track assembly includes a track, a track tensioner, a tensioning rod, a track roller, a track bracket and a track bearing seat. The track is a triangular track, the track bracket is arranged in the triangular track, and the track bearing seat is fixed on the track bracket.

[0013] Furthermore, the drive assembly includes a reducer, a track drive shaft and a track bearing seat. The input end of the reducer is connected to the output end of the motor. The output end of the reducer is provided with a drive shaft sleeve. The track drive shaft is fixed to the frame through the drive bearing seat. The drive shaft sleeve is provided with a hexagonal hole. The track drive shaft is a hexagonal shaft that is inserted into the hexagonal hole. The track bearing seat is provided with an adjustment hole that slides with the hexagonal shaft, and the hexagonal shaft extends through the adjustment hole to both sides of the track.

[0014] Furthermore, the track bracket is provided with a track support shaft sleeve and a track support shaft slidingly matched with the track support shaft sleeve, and the pitch adjuster includes a screw shaft sleeve fixed on the track support shaft sleeve and a reciprocating screw shaft threadedly connected to the screw shaft sleeve, and the reciprocating screw shaft is slidably connected to the track bracket through a screw shaft fixing plate.

[0015] Furthermore, a console and a brake pedal are provided on the frame.

[0016] The beneficial effects of the present invention are:

[0017] 1. For machines using this chassis, when the track wheels bear a heavy weight, this structure can still make it easier to adjust the track and wheelbase on the spot. By using the chair as a lever and the wheels behind it as a fulcrum, it can support a large weight.

[0018] 2. For hilly and mountainous areas with complex terrain, narrow and rugged roads, and small plots of land, track-driven vehicles have better passing performance, and triangular tracks are used to increase the chassis height and enhance its obstacle-crossing ability;

[0019] 3. Using the rear wheels as support can ensure that the crawler body is not damaged during the track pitch change process, avoid track wear caused by friction between the crawler and the ground during the pitch change process, and avoid damage to the chassis mechanical structure;

[0020] 4. The adaptive adjustment of the crank movement through the planting frame stabilizer can ensure that the entire planting process is smooth and controllable, ensuring accurate seedling grafting and transplanting, and the pressure can be adjusted at any time, which is convenient to adjust.

[0021] In summary, the present invention can adjust the wheelbase at any position and at any time through its specific design; on the other hand, it can reduce the impact load of the crank through the stabilizer, making the planting movement smooth, accurate and reliable, and realizing semi-automatic planting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the first direction of the present invention;

[0023] Figure 2 A schematic diagram of the second direction of the present invention;

[0024] Figure 3 This is a schematic diagram of the present invention after removing the seedling tray mechanism;

[0025] Figure 4 It is a side view of the present invention;

[0026] Figure 5 This is a schematic diagram of the present invention in the first direction after removing the power assembly, seedling tray mechanism, and planting mechanism;

[0027] Figure 6 This is a second-direction schematic diagram of the present invention after removing the power assembly, seedling tray mechanism, and planting mechanism;

[0028] Figure 7 This is a third-direction schematic diagram of the present invention after removing the power assembly, seedling tray mechanism, and planting mechanism;

[0029] Figure 8 It is a distance adjustment schematic diagram of the present invention;

[0030] Figure 9 for Figure 8A top view of

[0031] Figure 10 A schematic diagram of a first direction of the planting rack stabilizer of the present invention;

[0032] Figure 11 A schematic diagram of the planting rack stabilizer of the present invention in a second direction;

[0033] Figure 12 This is a schematic diagram of the planting rack stabilizer of the present invention in the third direction.

[0034] Description of reference numerals:

[0035] 1. Frame, 2. Track, 3. Track tensioner, 4. Tensioning rod, 5. Track roller, 6. Track bracket, 7. Track bearing seat, 8. Track drive shaft, 9. Screw handle, 10. Reciprocating screw, 11. Drive shaft sleeve, 12. Reducer, 13. Rear wheel fixing bracket, 14. Rear wheel fixing hole, 15. Rear wheel hub, 16. Rear wheel, 17. Horizontal fixing pin, 18. Vertical fixing ear, 19. Seat lower bracket, 20. Seat, 21. Front wheel rod, 22. Front wheel rod sleeve, 23. Front wheel bracket, 24. Front wheel hub, 25. Front wheel, 26. Seat cross bracket, 27. Upper vertical fixing pin, 28. Lower vertical fixing pin hole, 29. Track support shaft, 30. Track support shaft sleeve, 31. First screw fixing plate, 32. Screw nut, 33. Second screw fixing plate, 34. Screw bushing, 35. Drive bearing seat, 36. Scissor frame, 37. Seat assembly, 38. Rear wheel assembly, 39. Front wheel assembly, 40. Track assembly, 41. Powertrain, 42. Drive assembly, 43. Planting mechanism, 44. Seedling tray mechanism, 45. Generator, 46. Battery, 47. Motor, 48. Hydraulic cylinder, 49. Sprocket, 50. Lifting frame, 51. Planting frame stabilizer, 52. Drive shaft, 53. Planting frame, 54. Crank, 55. Movable frame, 56. Shovel, 57. Fixed plate, 58. Duckbill, 59. Spring, 60. Pressure wheel, 61. Pressure belt, 62. Fixed seat, 63. Pulley, 64. Drive motor, 65. Driving wheel, 66. Driven wheel, 67. Pressure belt winding groove, 68. Pulley shaft, 69. Drive shaft. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0039] In the above description of the present invention, it should be noted that the terms "one side," "the other side," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0040] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0041] like Figures 1 to 12 As shown, a variable-distance semi-automatic transplanter of this embodiment includes a frame, a seat assembly 37, a rear wheel assembly 38, a front wheel assembly 39, a track assembly 40, a power assembly 41, a drive assembly 42, a planting mechanism 43, and a seedling tray mechanism 44;

[0042] The power assembly includes a generator 45, a battery 46, a motor 47 and a hydraulic cylinder 48. The generator is fixed on the frame and is electrically connected to the battery, motor and hydraulic motor. The motor provides power to the reducer through a sprocket 49. The lower end of the hydraulic cylinder is fixed on the frame, and the upper end is fixed on the lifting frame column. The planting mechanism and the seedling tray mechanism are fixed on the lifting frame 50. The planting mechanism is provided with a planting frame stabilizer 51 for stabilizing the planting movement.

[0043] The planting mechanism includes a transmission shaft 52, a planting frame 53, a crank 54, a movable frame 55, a shovel 56, a fixed plate 57, a duckbill piece 58 and a spring 59. The planting frame is fixed on the lifting frame and rises and falls with the lifting frame.

[0044] In particular, this embodiment includes a planting frame stabilizer, specifically including a pressure wheel 60 coaxially arranged with the crank shaft and a pressure belt 61 slidably sleeved on the pressure wheel, both ends of the pressure belt are fixed to the frame, and at least one end is provided with an adjustment mechanism for adjusting the pressure of the pressure belt.

[0045] The adjusting mechanism includes a fixed seat 62, a pulley 63, a driving motor 64, a driving pulley 65 and a driven pulley 66. The pulley is provided with a pressure belt winding groove 67. The fixed seat is fixed to the frame by bolts. A pulley shaft 68 and a driving shaft 69 are provided through the fixed seat. One end of the pulley shaft is fixed to the pulley, and the other end is fixed to the driven pulley. One end of the driving shaft is fixed to the output shaft of the driving motor, and the other end is fixed to the driving pulley. The driving pulley and the driven wheel are driven by gear meshing.

[0046] When adjustment is required, just turn on the drive motor, the motor rotates, drives the driving wheel to rotate, drives the driven wheel to rotate through gear engagement, and then drives the pulley to rotate, tightening or loosening the pressure wheel, thereby adjusting the pressure to the set value.

[0047] Through pressure regulation, a damping effect can be formed on the crank movement. When the crank moves too quickly, the stabilizer needs to stop its movement and slow down the movement. When the crank moves too slowly, the stabilizer needs to actively pull the movement and promote acceleration.

[0048] Adaptive adjustment of the crank movement through the planting frame stabilizer can ensure that the entire planting process is smooth and controllable, ensuring accurate seedling grafting and transplanting, and the pressure can be adjusted at any time, which is convenient to adjust.

[0049] The motor is arranged at the front end of the frame, and the motor uses a sprocket to transmit power to the reducer input shaft; the power on the reducer input shaft is transmitted to the reducer through the hexagonal shaft to output to the crawler, and the power is transmitted to the first shaft through the sprocket to provide power for the planting mechanism and seedling tray mechanism.

[0050] The first shaft is fixed on the top of the frame through the vertical frames at both ends. The right sprocket inputs power and the left sprocket outputs the power to the gearbox input shaft on the support column. Two pairs of gears are engaged in the gearbox. The power is output from the gearbox output shaft through the sprocket to the commutator, and then output to the dial shaft after reversing.

[0051] The dial shaft is fixed to the lifting frame by a bearing seat. The sprocket at the left end of the shaft transmits power to the first planting shaft. The right end of the dial shaft is equipped with two notched round pieces, and a long seedling-pushing piece is rotated at the notch. When the dial shaft rotates, the seedling-pushing piece at the end of the dial shaft drives the bearing on the rotating disk fixed below the seedling tray shaft to rotate, driving the seedling tray shaft to rotate. The seedling tray shaft is fixedly connected to the seedling tray seat at the upper end, and the seedling cup is fixedly connected to the seedling tray seat. When rotating, it drives one of the seedling cups to rotate to the notch of the seedling ring, and the bottom cover of the seedling cup opens and the seedling pot falls freely into the duckbill mechanism to complete the seedling planting action.

[0052] The hydraulic cylinder is fixed on both sides of the frame, the lower base of the hydraulic cylinder is fixed to the frame, the upper side is fixed to the lifting frame by bolts, the lower slide is fixed to the frame, the upper slide is fixed to the lifting frame, and there is a scissor frame on the slide that moves along the slide. When the hydraulic cylinder is energized, the upper side drives the lifting frame to rise, and the scissor frame 36 moves along the slide as a support to ensure the stability of the lifting frame. The scissor frame can also serve as a support when it reaches the specified height.

[0053] The planting mechanism is fixed on the lifting frame. The power of the planting mechanism is transmitted to the first planting shaft by the sprocket at the left end of the dial shaft, and the sprocket on the first planting shaft is then transmitted to the second planting shaft. A friction wheel is fixed on the left end of the second planting shaft, which is mainly composed of a fixing bolt, a friction belt, a friction wheel, etc. The friction wheel will rotate with the rotating shaft and play a buffering role on the movement of the entire crank mechanism.

[0054] The seat assembly includes a seat 20 and a seat frame. The seat frame includes a seat lower frame 19 and a seat cross frame 26. A rear wheel assembly is arranged below the proximal end of the seat cross frame connected to the seat lower frame. The distal end of the seat cross frame is rotatably connected to the frame, and when it is flipped relative to the frame, the rear wheel of the rear wheel assembly can just contact the ground to form support, and the track assembly can be suspended. The seat and the seat lower frame together constitute the same flipping force arm.

[0055] The drive assembly includes a reducer 12, a track drive shaft 8, and a track bearing seat 7. The reducer is fixed to the front end of the frame. Power is transmitted to the reducer via the reducer input shaft and then output through the output shaft after reduction. The reducer output shaft ends at a drive sleeve 11, which has a round exterior and a hexagonal hole inside. The track drive shaft 8, a hexagonal shaft, nests within the sleeve for power transmission. The track drive shaft 8 is supported by a drive bearing seat 35, which is bolted to the frame.

[0056] Above the reducer is a seat 20, hinged to the frame 1 via a lower seat bracket 19 and a seat cross bracket 26. The lower end of the lower seat bracket 19 is secured to the frame by a horizontal fixing pin 17 and a vertical fixing lug 18. The cross bracket 26 is vertically connected to the lower seat bracket 19. The other end of the cross bracket 26 is hinged to a hole at the lower end of the frame 1 by an upper vertical fixing pin 27, allowing rotation around the pin. The lower end of the lower seat bracket 19 is fixedly connected to the rear wheel mounting bracket 13. The rear wheel mounting bracket 13 is fixedly connected to the rear wheel hub 15 via bolts in the rear wheel fixing hole 14. The rear wheel 16 is fixedly connected to the rear wheel hub 15.

[0057] Track assemblies are arranged on both sides of the frame 1. The track assembly mainly consists of a track 2 and a track tensioner 3, a tensioning rod 4, a track roller 5, a track bracket 6, and a track bearing seat 7 to form an integrated structure and can be disassembled as a whole.

[0058] The frame is mainly supported by the track support sleeve 30. The outside of the track support sleeve 30 is a hexagonal shaft with a larger side length, and the inside is composed of a hexagonal hole with a smaller side length. The track support shaft 29 and the track support sleeve 30 are nested and matched. When the pitch does not need to be changed, they are fixed by bolts on the outside of the sleeve.

[0059] The reciprocating screw 10 is fixed to the inside of the track support 6 by screw fixing plates 31 (both tracks) with bolts on the plates. The screw nut 32 is fixed to the first screw fixing plate 31 and can move laterally along the reciprocating screw 10. The middle part of the reciprocating screw 10 is fixed below the track support sleeve 30 by a screw sleeve 34 and a second screw fixing plate 33, keeping it stationary and allowing the reciprocating screw to rotate within it.

[0060] The front wheel assembly includes a front wheel rod sleeve 22 fixed in front of the frame, the outside of which is a hexagonal shaft sleeve with a larger side length and the inside is a hexagonal through hole. The front wheel rod 21 and the front wheel rod sleeve 22 are nested and matched, and can move laterally. They are fixed by bolts when no pitch change is required.

[0061] The specific operations of pitch change are as follows:

[0062] Step 1: When changing the pitch, first pull out the pins that fix the seat, that is, the horizontal fixing pins 17 (two on the left and right) that connect the lower bracket 19 of the seat to the vertical fixing ears 18 on the frame 1, and the seat rotates downward around the frame along the upper vertical fixing pins 27;

[0063] Step 2: When the seat rotates, the rear wheel 16 contacts the ground. The rear wheel 16 is used as a fulcrum, and the seat and the bracket under the seat are used as levers to press the seat. The seat and the bracket under the seat together form a same turning arm to pry the two track wheels off the ground. The pitch change operation is extremely labor-saving.

[0064] Step 3: Use the fixing pin to fix through the lower vertical fixing pin hole 28 and the second hole on the seat cross bracket. At this time, the rear wheel serves as a support wheel and the track is suspended in the air.

[0065] Step 4: Insert the screw handle 9 by the tool to rotate the reciprocating screw 10. Under the action of force, the screw nut 32 drives the screw fixing plate 33 and the integrated crawler assembly to move outward along the crawler support axis to the appropriate width, that is, the crawler pitch change on one side is completed. Rotate the reciprocating screw on the other side in the opposite direction to the appropriate width, and the crawler pitch change on both sides is completed;

[0066] Step 5: Use bolts to fix the track fixing sleeve and track fixing shaft, remove the fixing pin inserted in the lower vertical fixing pin hole 28, and return the seat to its original position;

[0067] Step 6: Remove the bolts that secure the front wheel rod and the front wheel rod sleeve, move the front wheel rod outward along the front wheel rod sleeve to the appropriate distance and then secure it. The front wheel pitch change is completed.

[0068] Both the tracks and the front wheels have completed pitch change.

[0069] The crawler track of this embodiment is a V-belt, which can increase the height of the chassis and enhance its obstacle-crossing capability.

[0070] The rear wheel of this embodiment is not limited to a rubber wheel. The material can be selected according to actual needs, such as a metal wheel, or the type can be selected, such as an inflatable wheel or a solid wheel. To increase strength, it can be a solid wheel or a metal wheel, thereby improving its carrying capacity.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A variable-distance semi-automatic transplanter, comprising a frame, a seat assembly, a rear wheel assembly, a front wheel assembly, a crawler assembly, a power assembly, a drive assembly, a planting mechanism, and a seedling tray mechanism, characterized in that: the seat assembly comprises a seat and a seat bracket, the seat bracket comprises a seat lower bracket and a seat cross bracket vertically connected to the seat lower bracket, the rear wheel assembly is arranged below the proximal end of the seat cross bracket connected to the seat lower bracket, the distal end of the seat cross bracket is rotatably connected to the frame, and when the rear wheel of the rear wheel assembly is flipped relative to the frame, the rear wheel of the rear wheel assembly is just It can contact the ground to form support and make the crawler assembly suspended. The seat and the bracket under the seat together constitute the same flip arm. The crawler assembly includes two crawlers whose spacing is adjusted by a distance adjuster. The power assembly includes a generator, a battery, a motor and a hydraulic cylinder. The generator is fixed on the frame and is electrically connected with the battery, the motor and the hydraulic cylinder. The motor provides power to the reducer through a sprocket. The lower end of the hydraulic cylinder is fixed on the frame and the upper end is fixed on the lifting frame column. The planting mechanism and the seedling tray mechanism are fixed on the lifting frame. The planting mechanism is provided with a planting frame stabilizer for stabilizing the planting movement, the planting mechanism includes a crank, the planting frame stabilizer includes a pressure wheel coaxially arranged with the crank shaft and a pressure belt slidably sleeved on the pressure wheel, both ends of the pressure belt are fixed to the frame, and at least one end is provided with an adjustment mechanism for adjusting the pressure of the pressure belt, the adjustment mechanism includes a fixed seat, a pulley, a driving motor, a driving wheel and a driven wheel, the pulley is provided with a pressure belt winding groove, the fixed seat is fixed to the frame by bolts, and the pulley shaft and The drive shaft has one end fixed to the pulley and the other end fixed to the driven wheel, one end of the drive shaft is fixed to the output shaft of the driving motor, and the other end is fixed to the driving wheel, and the driving wheel and the driven wheel gear are meshed and driven, and the track assembly includes a track bracket, and the track bracket is provided with a track support shaft sleeve and a track support shaft slidingly matched with the track support shaft sleeve, and the pitch adjuster includes a screw shaft sleeve fixed on the track support shaft sleeve and a reciprocating screw screw threadedly connected to the screw shaft sleeve, and the reciprocating screw screw is slidably connected to the track bracket through a screw shaft fixing plate.

2. The variable-distance semi-automatic transplanter according to claim 1, characterized in that: The planting mechanism also includes a transmission shaft, a planting frame, a movable frame, a shovel, a fixed plate, a duckbill piece and a spring. The planting frame is fixed on the lifting frame and rises and falls with the lifting frame.

3. The variable-distance semi-automatic transplanter according to claim 1, characterized in that: The frame is fixed with a vertical fixing ear, and the vertical fixing ear is provided with a pin hole. The lower end of the seat lower bracket is inserted into the pin hole through a horizontal fixing pin to form a detachable fixation with the frame, and the seat cross bracket is rotatably connected to the frame through the vertical fixing pin.

4. The variable-distance semi-automatic transplanter according to claim 1, characterized in that: The track assembly also includes a track, a track tensioning wheel, a tensioning rod, a track roller and a track bearing seat. The track is a triangular track, the track bracket is arranged in the triangular track, and the track bearing seat is fixed on the track bracket.

5. The variable-distance semi-automatic transplanter according to claim 1, characterized in that: The drive assembly includes a reducer, a track drive shaft and a track bearing seat. The input end of the reducer is connected to the output end of the motor. A drive shaft sleeve is provided at the output end of the reducer. The track drive shaft is fixed to the frame through the drive bearing seat. The drive shaft sleeve is provided with a hexagonal hole. The track drive shaft is a hexagonal shaft that is inserted into the hexagonal hole. The track bearing seat is provided with an adjustment hole that slides with the hexagonal shaft, and the hexagonal shaft extends through the adjustment hole to both sides of the track.

6. The variable-distance semi-automatic transplanter according to claim 1, characterized in that: A console and a brake pedal are provided on the frame.

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