Variable-distance semi-automatic transplanter

Abstract

The invention relates to a variable-pitch semi-automatic transplanter, and belongs to the technical field of agricultural machinery, the variable-pitch semi-automatic transplanter comprises a rack, a seat assembly, a rear wheel assembly, a front wheel assembly, a crawler belt assembly, a power assembly, a driving assembly, a planting mechanism and a seedling tray mechanism, the seat assembly comprises a seat and a seat bracket, the seat bracket comprises a seat lower bracket and a seat transverse bracket, and the seat lower bracket is connected with the front wheel assembly; the rear wheel assembly is arranged below the seat transverse support, the far end of the seat transverse support is rotationally connected with the rack, when the far end of the seat transverse support and the rack are turned over relatively, a rear wheel of the rear wheel assembly can just make contact with the ground to form supporting, the crawler belt assembly is suspended, and the seat and the seat lower support jointly form the same turning force arm. The planting mechanism is provided with a planting frame stabilizer. Through the specific design, on one hand, the wheel track can be adjusted at any position and any moment; on the other hand, the impact load of the crank is weakened through the stabilizer, so that planting movement is stable, accurate and reliable, and semi-automation of planting operation is achieved.

Description

Technical Field

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

[0002] Transplanting is an important part of the growth process of many crops. Due to the large amount of some crops, the intensity of transplanting operations also increases. At present, the labor efficiency of manual tobacco transplanting is very low, and there are problems such as high labor intensity and poor transplanting quality.

[0003] In order to improve work efficiency and reduce the intensity of transplanting work, some 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 adjusts the weight of the counterweight to balance the unevenness of the movement during the movement. 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, 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 seat cross bracket is flipped relative to the frame, the rear wheel of the rear wheel assembly can just contact the ground to form support, and make The track assembly is suspended, and the seat and the support 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 electrically 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 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, a pulley shaft and a driving shaft are penetrated through the fixed seat, one end of the pulley shaft is fixed to the pulley, and the other end is fixed to the driven wheel, 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 wheel, and the driving wheel is 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 tensioning wheel, 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 sleeve, the track drive shaft is fixed to the frame through the drive bearing seat, the drive sleeve is provided with a hexagonal hole, the track drive shaft is a hexagonal shaft 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 passes through the adjustment hole and extends to both sides of the track.

[0014] Furthermore, the track bracket is provided with a track support shaft sleeve and a track support shaft slidably 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 threadedly connected to the screw shaft sleeve, and the reciprocating screw is slidably connected to the track bracket through a screw fixing plate.

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

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

[0017] 1. For machinery using this chassis, when the weight borne by the crawler wheels is very large, the structure can still adjust the crawler and wheelbase on the spot more conveniently, using the chair as a lever and the wheels behind it as a fulcrum to support a large weight;

[0018] 2. For the terrain characteristics of hilly and mountainous areas, the terrain is complex, the roads are narrow and rugged, and the plots are small. The track wheel drive has better passing performance, and the triangular track is used to increase the chassis height and increase its obstacle crossing ability;

[0019] 3. The rear wheels are used as support to ensure that the crawler body is not damaged during the crawler pitch change process, and to avoid the crawler wear caused by friction between the crawler and the ground during the pitch change process, which may cause 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, through a specific design, can adjust the wheelbase at any position and any time on the one hand; on the other hand, the stabilizer can reduce the impact load of the crank, so that the planting movement is smooth, accurate and reliable, and semi-automation of the planting operation is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 It is a schematic diagram of the second direction of the present invention;

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

[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, the seedling tray mechanism, and the 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] Fig. 9 for Figure 8A top view of

[0031] Fig.10 It is a schematic diagram of the first direction of the planting rack stabilizer of the present invention;

[0032] Fig.11 It is a schematic diagram of the planting rack stabilizer of the present invention in a second direction;

[0033] Fig.12 It 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 frame, 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 frame, 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. Screw fixing plate, 32. Screw nut, 33. Screw fixing plate, 34 . Screw sleeve, 35. Transmission bearing seat, 36. Scissor frame, 37. Seat assembly, 38. Rear wheel assembly, 39. Front wheel assembly, 40. Track assembly, 41. Power assembly, 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. Transmission shaft, 53. Planting frame, 54. Crank, 55. Movable frame, 56. Shovel, 57. Fixed plate, 58. Duckbill piece, 59. Spring, 60. Pressure wheel, 61. Pressure belt, 62. Fixed seat, 63. Pulley, 64. Driving motor, 65. Driving wheel, 66. Driven wheel, 67. Pressure belt winding groove, 68. Pulley shaft, 69. Driving shaft. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 here 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 claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are 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, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the above description of the present invention, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but 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 connected to the battery, the motor and the 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 wheel 65 and a driven wheel 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 penetrated through the fixed seat. One end of the pulley shaft is fixed to the pulley, and the other end is fixed to the driven wheel. 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 wheel. The driving wheel and the driven wheel are driven by gear meshing.

[0046] When adjustment is required, just turn on the drive motor, the motor rotates, driving the driving wheel to rotate, and through gear meshing, driving the driven wheel to rotate, and then driving 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 to slow down the movement. When the crank moves too slowly, the stabilizer needs to actively pull the movement to promote acceleration.

[0048] By adaptively adjusting the crank movement through the planting frame stabilizer, the entire planting process can be ensured to be smooth and controllable, ensuring accurate seedling grafting and transplanting, and the pressure can be adjusted at any time, making the adjustment convenient.

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

[0050] The first shaft is fixed on the top of the frame through the two end brackets. The right sprocket inputs power and the left sprocket outputs the power to the gear box input shaft on the support column. Two pairs of gears are meshed in the gear box. The power is output from the gear box output shaft through the sprocket to the commutator, and then output to the dial shaft after reversing.

[0051] The dial shaft is fixed on the lifting frame by a bearing seat. The sprocket at the left end of the shaft transmits power to the first planting shaft. Two round pieces with notches are installed on the right end of the dial shaft. Long strips of seedling-pushing pieces are rotated at the notches. When the dial shaft rotates, the seedling-pushing pieces at the end of the dial shaft drive the bearings on the rotating disk fixed below the seedling tray shaft to rotate, thereby 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, one of the seedling cups is driven to rotate to the notch of the seedling ring, and the bottom cover of the seedling cup is opened, 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 on 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 a specified height.

[0053] A planting mechanism is fixed on the lifting frame, and 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 further 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 fixing bolts, friction belts, friction wheels, etc. The friction wheel will rotate with the rotating shaft to buffer 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. When the seat is flipped relative to the frame, the rear wheel of the rear wheel assembly can just touch the ground to form support and make the track assembly 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 at the front end of the frame. The power is transmitted to the reducer by the reducer input shaft and output through the output shaft after deceleration. The end of the reducer output shaft is a drive sleeve 11, which is a round shaft on the outside and a hexagonal hole on the inside. The track drive shaft 8 is a hexagonal shaft that is nested with the drive sleeve 8 for power transmission. The track drive shaft 8 is supported by a drive bearing seat 35, and the drive bearing seat is fixed to the frame by bolts.

[0056] There is a seat 20 above the reducer, which is hinged to the frame 1 through the seat lower bracket 19 and the seat cross bracket 26. The lower end of the seat lower bracket 19 is fixed to the frame by the horizontal fixing pin 17 and the vertical fixing ear 18. The seat cross bracket 26 is vertically connected to the seat lower bracket 19. The other end of the seat cross bracket 26 is hinged to the hole at the lower end of the frame 1 by the upper vertical fixing pin 27 and can rotate around the pin. The lower end of the seat lower bracket 19 is fixedly connected to the rear wheel fixing frame 13. The rear wheel fixing frame 13 is fixedly connected to the rear wheel hub 15 through the bolts in the rear wheel fixing hole 14, and 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 tensioning wheel 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 track support sleeve 30 has a hexagonal shaft with a larger side length on the outside and a hexagonal hole with a smaller side length on the inside. The track support shaft 29 is nested with the track support sleeve 30 and is fixed by bolts on the outside of the sleeve when the pitch does not need to be changed.

[0059] The reciprocating screw 10 is fixed to the inner side of the track support 6 by bolts on the screw fixing plate 31 (both tracks have it), and the screw nut 32 is fixed on the screw fixing plate 31, and the screw nut 32 can move laterally along the reciprocating screw 10. The middle part of the reciprocating screw 10 is fixed under the track support sleeve 30 by the screw sleeve 34 and the screw fixing plate 33, and remains fixed, and the reciprocating screw can rotate therein.

[0060] The front wheel assembly includes a front wheel rod sleeve 22 fixed in front of the frame, the outer portion of which is a hexagonal shaft sleeve with a larger side length and the inner portion 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. When the pitch change is not required, it is fixed by bolts.

[0061] The specific operation of pitch change is 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: During the rotation of the seat, 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 the same flip arm to pry the two track wheels off the ground, and 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 supporting wheel and the track is suspended;

[0065] Step 4: Insert the screw handle 9 through 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 a suitable width, that is, the crawler pitch change on one side is completed, and the reciprocating screw on the other side is rotated in the opposite direction to a suitable width, and the crawler pitch change on both sides is completed;

[0066] Step 5: Use bolts to fix the track fixing sleeve and the 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 fix the front wheel rod and the front wheel rod sleeve, move the front wheel rod outward along the front wheel rod sleeve to a suitable distance and then fix it, and 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 the 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 solution of the present invention rather than to limit it. 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 solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A variable distance semi-automatic transplanter, The invention comprises a frame, a seat assembly, a rear wheel assembly, a front wheel assembly, a track assembly, a power assembly, a drive assembly, a planting mechanism, and a seedling tray mechanism, and is 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 seat cross bracket 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 is suspended, the seat and the seat lower bracket together constitute the same flipping force arm, the track assembly comprises two tracks whose spacing is adjusted by a distance adjuster, the power assembly comprises 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 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.

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

3. A variable-distance semi-automatic transplanter according to claim 2, characterized in that: The planting frame stabilizer comprises 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.

4. A variable-distance semi-automatic transplanter according to claim 3, characterized in that: The adjusting mechanism comprises 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. A pulley shaft and a driving shaft are penetrated through the fixed seat. One end of the pulley shaft is fixed to the pulley, and the other end is fixed to the driven wheel. 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 wheel. The driving wheel is driven by gear meshing.

5. The variable-distance semi-automatic transplanter according to claim 1, characterized in that: The frame is fixedly provided 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.

6. The variable-distance semi-automatic transplanter according to claim 1, characterized in that: The track assembly comprises a track, a track tensioning wheel, 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.

7. The variable-distance semi-automatic transplanter according to claim 6, 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 sleeve is provided at the output end of the reducer. The track drive shaft is fixed to the frame through a drive bearing seat. The drive sleeve is provided with a hexagonal hole. The track drive shaft is a hexagonal shaft 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 passes through the adjustment hole and extends to both sides of the track.

8. The variable-distance semi-automatic transplanter according to claim 7, characterized in that: The track bracket is provided with a track support shaft sleeve and a track support shaft slidably matched with the track support shaft sleeve. The pitch adjuster includes a screw shaft sleeve fixed on the track support shaft sleeve and a reciprocating screw threadedly connected to the screw shaft sleeve. The reciprocating screw is slidably connected to the track bracket through a screw fixing plate.

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

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