A portable backpack rotary tiller

Abstract

The present invention discloses a portable backpack rotary tiller, comprising a motor compartment, a knife compartment and a carrying mechanism, wherein the motor compartment and the knife compartment are both detachably connected to the carrying mechanism, a telescopic mechanism is arranged between the motor compartment and the knife compartment, a driving motor is installed in the motor compartment, a transmission box is arranged in the knife compartment, a lifting mechanism is arranged between the transmission box and the knife compartment, a main rotating shaft is arranged in the transmission box, the axis of the main rotating shaft is arranged horizontally, a knife is coaxially connected to the main rotating shaft, the driving motor is connected to the main rotating shaft through a telescopic transmission mechanism, a folding handrail is hinged outwardly to the motor compartment, a walking wheel mounting frame is hinged outwardly to the knife compartment, and a walking wheel is arranged on the walking wheel mounting frame. The present invention has the advantages of small space occupation, easy to carry and high land cultivation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a portable backpack rotary tiller. Background Art

[0002] A rotary tiller is a tilling machine that completes plowing and raking operations. It has been widely used because of its strong soil crushing ability and flat surface after plowing. It can also cut up the root stubble buried below the surface, making it easier for the seeder to operate and providing a good seed bed for later sowing.

[0003] On the plains, rotary tillers can be used in conjunction with tractors and other agricultural power equipment to provide large-scale and fast arable land. Rotary tillers come in a variety of sizes. However, in mountainous areas, due to terrain problems, most farmlands are "palm-sized fields" with different shapes and sizes. The use of traditional rotary tillers is not only difficult to operate, but even the most basic transportation is a problem. At present, the area of ​​arable land in mountainous areas accounts for a large proportion of my country's agriculture, which greatly affects the efficiency and quality of arable land in mountainous areas. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by this patent application is: how to provide a portable backpack rotary tiller that occupies little space, is easy to carry, and has high tillage efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A portable backpack rotary tiller comprises a motor compartment, a knife compartment and a carrying mechanism, wherein the motor compartment and the knife compartment are detachably connected to the carrying mechanism, a telescopic mechanism is arranged between the motor compartment and the knife compartment, a driving motor is installed in the motor compartment, a transmission box is arranged in the knife compartment, a lifting mechanism is arranged between the transmission box and the knife compartment, a main rotating shaft is arranged in the transmission box, the axis of the main rotating shaft is arranged horizontally, a knife is coaxially connected to the main rotating shaft, the driving motor is connected to the main rotating shaft through a telescopic transmission mechanism, a folding armrest is hinged outwardly to the motor compartment, a walking wheel mounting frame is hinged outwardly to the knife compartment, and walking wheels are arranged on the walking wheel mounting frame.

[0007] When in use, the whole portable backpack rotary tiller is carried on the body through the carrying mechanism, and the user walks to the cultivated land in the mountainous area, removes the carrying mechanism, and the telescopic mechanism can adjust the distance between the motor compartment and the knife compartment, so that the portable backpack rotary tiller is smaller in the carrying state. In the cultivated land state, the height is increased to adapt to the operation. The driving motor drives the main shaft to rotate through the telescopic transmission mechanism, and the main shaft drives the knife to rotate to realize the cultivated land operation. The telescopic transmission mechanism can ensure that the power of the driving motor can be output to the knife, and at the same time adapt to the adjustment of the distance between the knife compartment and the motor compartment by the telescopic mechanism. The lifting mechanism can lift the knife and the transmission box so that they can freely enter and leave the knife compartment, so as to realize the storage and use of the knife and the transmission box, which is conducive to reducing the size of the portable backpack rotary tiller. The portable backpack rotary tiller provided by this scheme has the advantages of small size, easy operation, and easy to carry. It is used to process small areas of land such as cultivated land in mountainous areas and "palm fields", reducing the cost of cultivated land and improving efficiency.

[0008] As an optimization, the telescopic mechanism includes a first electric push rod arranged on the motor magazine, the free end of the first electric push rod is arranged downward, a mudguard is extended outward from the outside of the knife magazine, and the free end of the first electric push rod is fixedly mounted on the mudguard.

[0009] In this way, the first electric push rod can adjust the distance between the knife chamber and the motor chamber by extending, thereby achieving overall contraction and extension, which is quick and convenient.

[0010] As an optimization, the telescopic transmission mechanism includes an outer sleeve respectively arranged on the motor magazine and an inner sleeve arranged on the knife magazine, the outer sleeve and the inner sleeve are slidingly connected with each other, a main transmission shaft is vertically arranged in the outer sleeve, a first gear is coaxially mounted on the main transmission shaft, the main transmission shaft is transmission-connected with the driving motor, a secondary transmission shaft is vertically arranged in the inner sleeve, a second gear is arranged on the secondary transmission shaft, the end of the secondary transmission shaft enters the transmission box and is coaxially arranged with a first bevel gear, a second bevel gear is coaxially arranged on the main rotating shaft, and the first bevel gear is meshed with the second bevel gear for transmission.

[0011] In this way, the driving motor provides rotational power to drive the main transmission shaft and the first gear to rotate, and the secondary transmission shaft is driven to rotate through the meshing transmission of the second gear, and then the meshing transmission of the first bevel gear and the second bevel gear drives the main rotating shaft to rotate to provide power for the tool. When the whole is telescopically extended and retracted under the drive of the telescopic mechanism, the main transmission shaft and the secondary transmission shaft can be staggered without affecting the telescopic movement. At the same time, when in use, the lifting mechanism can drive the secondary transmission shaft to be lifted and lowered, and the meshing of the first gear and the second gear is achieved. The outer sleeve and the inner sleeve provide protection to prevent the main transmission shaft and the secondary transmission shaft from leaking out, thereby avoiding injury from the equipment.

[0012] As an optimization, the lifting mechanism includes a cylinder fixedly mounted on the transmission box, the secondary transmission shaft is rotatably mounted in the cylinder, the top of the cylinder is connected to a fixed plate, the secondary transmission shaft is interference fit connected to the fixed plate via a bearing, a second electric push rod is installed on the side of the fixed plate away from the transmission box, the end of the second electric push rod is fixedly connected to a turntable rotatably mounted on the tool magazine, and the turntable is provided with a through hole for accommodating the secondary transmission shaft to pass through.

[0013] In this way, the movement of the second electric push rod can realize the lifting and lowering of the fixed plate, the cylinder and the transmission box. At the same time, the auxiliary transmission shaft can also follow the lifting and lowering of the second electric push rod through the interference fit of the bearing, thereby realizing the action of aligning the meshing of the second gear and the first gear after misalignment.

[0014] As an optimization, the turntable is also connected to the cutter disc rotating mechanism, and the cutter disc rotating mechanism includes a third gear coaxially fixedly connected to the turntable, and the third gear is provided with a through hole to accommodate the passage of the secondary transmission shaft, and the third transmission gear is meshed with the fourth transmission gear for transmission, and the fourth transmission gear is connected to the stepper motor for transmission, and the stepper motor is fixedly mounted on the outside of the knife magazine.

[0015] In this way, the stepper motor drives the fourth gear to rotate, and after the fourth gear engages with the third gear, it drives the disc to rotate, and then drives the lifting mechanism to rotate, completing the rotation of the main rotating axis and the tool. The thickness of the tool is reduced after being folded by the folding mechanism, and it enters the tool magazine after rotation, occupying a small space. In addition, the axis of the tool is perpendicular to the back surface of the carrying mechanism, so if an accident or misoperation occurs when carrying it, it will not cause harm to people.

[0016] As an optimization, the tool folding mechanism includes extension shafts arranged opposite to each other at both ends of the main rotating shaft, and a groove is arranged inwardly on the end surface of the main rotating shaft, and the inner diameter of the groove is consistent with the outer diameter of the extension shaft. The outer surface of the groove and the extension shaft are both provided with a V-groove, and a roller mounting frame is fixedly installed in the V-groove in the groove, and a roller is rotatably installed in the roller mounting frame, and the angle between two adjacent rollers is 90°, and a locking mechanism mounting hole is arranged on the main rotating shaft, and a locking mechanism is arranged in the locking mechanism mounting hole, and locking holes are arranged in a row on the extension shaft opposite to the locking mechanism.

[0017] In this way, the two opposing V-grooves can accommodate the roller mounting frames, achieving a close fit between the extension shaft and the main shaft. The roller mounting frames limit the mutual rotation between the two, ensuring that the power of the main shaft can be transmitted to the extension shaft. The locking mechanism can lock the extension length between the two to avoid mutual sliding between the two during work, thereby ensuring production safety.

[0018] As an optimization, the locking mechanism includes a disk arranged in the locking mechanism mounting hole, the axis of the disk is arranged horizontally, a torsion spring is arranged between the disk and the locking mechanism mounting hole, a button and a locking column are hinged on the disk respectively, the hinge points of the button and the locking column and the disk are symmetrically arranged about the center of the disk, and the locking column is arranged opposite to the locking hole.

[0019] In this way, the button is pressed, and the button moves downward, driving the disc to rotate, and the locking column at the other end is lifted to unlock the extension column and the main shaft. The operation is convenient. When locking is required, the button is pressed, and the extension column is pulled to the specified position, and the button is released. Under the action of the torsion spring, the disc presses the locking column into the locking hole to achieve locking.

[0020] As an optimization, the carrying mechanism includes a back plate, which is connected to the knife magazine and the motor magazine through a disassembly mechanism, and a shoulder strap is provided on the other side of the back plate, and the shoulder strap includes two shoulder straps, and the lower ends of the two shoulder straps are wrapped in the mounting frame on the back plate, and the upper ends of the shoulder straps are connected to the back plate through a height adjustment mechanism, and the height adjustment mechanism includes a plurality of inverted T-shaped through grooves provided on the back plate, and the inverted T-shaped through grooves are horizontally arranged, and the upper ends of the two shoulder straps are connected through an arc plate, and a T-shaped block is provided on the arc plate in the direction facing the back plate, and the T-shaped block is slidably arranged in the inverted T-shaped groove.

[0021] In this way, the back plate can be removed from the knife compartment and the motor compartment without affecting the use. The curved plate is ergonomic and comfortable. Because the heights of users are different, there is a mismatch in the carrying capacity. The height can be adjusted by adjusting the T-shaped block and different inverted T-slots. It is highly versatile, convenient and fast.

[0022] In this way, a stable connection between the T-shaped block and the inverted T-shaped groove can be achieved, thereby preventing the T-shaped block from slipping out during the climbing process, and providing high safety.

[0023] As an optimization, an L-shaped pin is provided at the lower end of the back panel, and the L-shaped pin is provided downwardly, and a back panel mounting plate is provided upwardly on the fender, and an L-shaped slot is provided on the side wall of the back panel mounting plate opposite to the L-shaped pin, and a slide groove is provided on the back panel opposite to the motor compartment, and a slider is slidably installed in the slide groove, and a return spring is provided between the side wall of the slider and the slide groove, and an L-shaped locking block is provided on the slider opposite to the motor compartment, and a accommodating groove is provided on the motor compartment opposite to the slide groove, the accommodating groove is consistent with the length of the slide groove, the depth of the accommodating groove is consistent with the thickness of the L-shaped locking block, and a accommodating hole is horizontally extended on the side wall of the accommodating groove, and the accommodating hole matches the extension section of the L-shaped locking block.

[0024] In this way, the L-shaped pin is inserted into the L-shaped slot to fix the bottom of the back panel. By moving the slider, the L-shaped locking block is set opposite the receiving slot. After releasing the slider, the reset spring drives the slider to reset, and at the same time, the L-shaped locking block is inserted into the receiving hole to complete the locking of the back panel, thereby achieving a stable connection between the back panel, the motor compartment and the compartment pipe, which is convenient for carrying.

[0025] Beneficial effects:

[0026] This solution has the advantages of small size and easy to carry. It can be carried on the back and moved to farmland in mountainous areas or terrain with rugged and difficult terrain. Compared with existing farming methods, it can improve efficiency. In addition, the portable backpack rotary tiller can be freely extended and retracted. It has a small size when stored and is easy to operate when unfolded. The various parts work together. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic structural diagram of a portable backpack rotary tiller disclosed in the present invention.

[0028] Figure 2 This is a schematic structural diagram of the portable backpack rotary tiller disclosed in the present invention (the blade chamber is arc-shaped).

[0029] Figure 3 for Figure 1 Schematic diagram of the northern part (the shoulder strap is not shown).

[0030] Figure 4 for Figure 1 Schematic diagram of usage status.

[0031] Figure 5 for Figure 1 Schematic diagram of the structure of the telescopic transmission mechanism.

[0032] Figure 6 for Figure 5 The schematic diagram of the structure without the transmission box.

[0033] Figure 7 Schematic diagram of the internal structure of the tool folding mechanism.

[0034] Figure 8 for Figure 7 Side view of.

[0035] Fig. 9 Schematic diagram of the back panel structure.

[0036] Fig.10 This is a schematic diagram of the coordination between the back panel and the motor compartment.

[0037] Fig.11 It is a schematic diagram of the structure of the accommodating slot on the motor compartment.

[0038] Fig.12This is a flow chart for storing the cutters of a portable backpack rotary tiller. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Reference Figure 1-12 A portable backpack rotary tiller comprises a motor compartment 1, a knife compartment 11 and a carrying mechanism, wherein the motor compartment 1 and the knife compartment 11 are detachably connected to the carrying mechanism, a telescopic mechanism is arranged between the motor compartment 1 and the knife compartment 11, a driving motor 12 and a power module 2 are installed in the motor compartment 1, a transmission box 13 is arranged in the knife compartment 11, a lifting mechanism is arranged between the transmission box 13 and the knife compartment 11, a main rotating shaft 14 is arranged in the transmission box 13, the axis of the main rotating shaft 14 is arranged horizontally, a knife 15 is coaxially connected to the main rotating shaft 14, the driving motor 12 is connected to the main rotating shaft 14 through a telescopic transmission mechanism, a folding armrest 16 is hinged outwardly to the motor compartment 1, a walking wheel mounting frame is hinged outwardly to the knife compartment 11, and a walking wheel 17 is arranged on the walking wheel mounting frame 59

[0041] When in use, the whole portable backpack rotary tiller is carried on the body through the carrying mechanism, and the user walks to the cultivated land in the mountainous area, removes the carrying mechanism, and the telescopic mechanism can adjust the distance between the motor compartment and the knife compartment, so that the portable backpack rotary tiller is smaller in the carrying state. In the cultivated land state, the height is increased to adapt to the operation. The driving motor drives the main shaft to rotate through the telescopic transmission mechanism, and the main shaft drives the knife to rotate to realize the cultivated land operation. The telescopic transmission mechanism can ensure that the power of the driving motor can be output to the knife, and at the same time adapt to the adjustment of the distance between the knife compartment and the motor compartment by the telescopic mechanism. The lifting mechanism can lift the knife and the transmission box so that they can freely enter and leave the knife compartment, so as to realize the storage and use of the knife and the transmission box, which is conducive to reducing the size of the portable backpack rotary tiller. The portable backpack rotary tiller provided by this scheme has the advantages of small size, easy operation, and easy to carry. It is used to process small areas of land such as cultivated land in mountainous areas and "palm fields", reducing the cost of cultivated land and improving efficiency.

[0042] In this embodiment, the telescopic mechanism includes a first electric push rod 18 arranged on the motor magazine 1, the free end of the first electric push rod 18 is set downward, and a mudguard 19 is extended outward from the outside of the knife magazine 11, and the free end of the first electric push rod 18 is fixedly mounted on the mudguard 19.

[0043] In this way, the first electric push rod can adjust the distance between the knife chamber and the motor chamber by extending, thereby achieving overall contraction and extension, which is quick and convenient.

[0044] Specifically, the power module 2 provides electrical energy to the driving motor 12 and the first electric push rod 18 .

[0045] Specifically, the power module 2 is but not limited to a storage battery or a UPS battery, which can store electric energy and provide stable electric energy output in the absence of AC power.

[0046] In this embodiment, the telescopic transmission mechanism includes an outer sleeve 21 and an inner sleeve 22 respectively arranged on the motor magazine 1 and arranged on the knife magazine 11. The outer sleeve 21 and the inner sleeve 22 are slidingly connected with each other. A main transmission shaft 23 is vertically arranged in the outer sleeve 21, and a first gear 24 is coaxially installed on the main transmission shaft 23. The main transmission shaft 23 is transmission-connected with the drive motor 12. A secondary transmission shaft 25 is vertically arranged in the inner sleeve 22, and a second gear 26 is arranged on the secondary transmission shaft 25. The end of the secondary transmission shaft 25 enters the transmission box 13 and is coaxially arranged with a first bevel gear 27. A second bevel gear 28 is coaxially arranged on the main rotating shaft 14, and the first bevel gear 27 is meshed with the second bevel gear 28 for transmission.

[0047] In this way, the driving motor provides rotational power to drive the main transmission shaft and the first gear to rotate, and the secondary transmission shaft is driven to rotate through the meshing transmission of the second gear, and then the main rotating shaft is driven to rotate through the meshing transmission of the first bevel gear and the second bevel gear to provide power for the tool. When the whole is telescopically extended under the drive of the telescopic mechanism, the main transmission shaft and the secondary transmission shaft can be staggered without affecting the telescopic movement. The outer sleeve and the inner sleeve provide protection to prevent the main transmission shaft and the secondary transmission shaft from leaking out, thereby avoiding injury from the equipment.

[0048] Specifically, in order to prevent the teeth from colliding when the first gear 24 and the second gear 26 are re-engaged after being misaligned, thicker gears can be used, or a pair of gears can be placed side by side.

[0049] In this embodiment, the lifting mechanism includes a cylinder 29 fixedly mounted on the transmission box 13, the auxiliary transmission shaft 25 is rotatably mounted in the cylinder 29, the top of the cylinder 29 is connected to the fixed plate 3, the auxiliary transmission shaft 25 is interference fit connected to the fixed plate 3 through a bearing, and a second electric push rod 31 is installed on the side of the fixed plate 3 away from the transmission box 13, the end of the second electric push rod 31 is fixedly connected to a turntable 32 rotatably mounted on the tool magazine 11, and the turntable 32 is provided with a through hole for accommodating the auxiliary transmission shaft 25 to pass through.

[0050] In this way, the movement of the second electric push rod can realize the lifting and lowering of the fixed plate, the cylinder and the transmission box. At the same time, the auxiliary transmission shaft can also follow the lifting and lowering of the second electric push rod through the interference fit of the bearing, thereby realizing the action of aligning the meshing of the second gear and the first gear after misalignment.

[0051] Specifically, the second electric push rod 31 is electrically connected to the power module to ensure the power source.

[0052] In this embodiment, the turntable 32 is also connected to the cutter disc rotating mechanism, and the cutter disc rotating mechanism includes a third gear 33 coaxially fixedly connected to the turntable 32, and the third gear 33 is provided with a through hole to accommodate the passage of the auxiliary transmission shaft, and the third transmission gear 33 is meshed with the fourth transmission gear 34 for transmission, and the fourth transmission gear 34 is connected to the stepper motor 35 for transmission, and the stepper motor 35 is fixedly installed on the outside of the knife magazine 11.

[0053] In this way, the stepper motor drives the fourth gear to rotate, and after the fourth gear engages with the third gear, it drives the disc to rotate, and then drives the lifting mechanism to rotate, completing the rotation of the main rotating axis and the tool. The thickness of the tool is reduced after being folded by the folding mechanism, and it enters the tool magazine after rotation, occupying a small space. In addition, the axis of the tool is perpendicular to the back surface of the carrying mechanism, so if an accident or misoperation occurs when carrying it, it will not cause harm to people.

[0054] Specifically, the stepper motor 35 is provided with a shaft encoder to facilitate accurate rotation.

[0055] In this embodiment, a tool retraction mechanism is also provided on the main rotating shaft 14, and the tool retraction mechanism includes extension shafts 36 arranged opposite to each other at both ends of the main rotating shaft 14, and a groove is provided inwardly on the end surface of the main rotating shaft 14, and the inner diameter of the groove is consistent with the outer diameter of the extension shaft 36, and the outer surfaces of the groove and the extension shaft 36 are both provided with a V-groove, and a roller mounting frame 37 is fixedly installed in the V-groove in the groove, and a roller 38 is rotatably installed in the roller mounting frame 37, and the angle between two adjacent rollers 38 is 90°, and a locking mechanism mounting hole 39 is provided on the main rotating shaft 14, and a locking mechanism is provided in the locking mechanism mounting hole 39, and locking holes 4 are arranged in a row on the extension shaft 36 opposite to the locking mechanism.

[0056] In this way, the two opposing V-grooves can accommodate the roller mounting frames, achieving a close fit between the extension shaft and the main shaft. The roller mounting frames limit the mutual rotation between the two, ensuring that the power of the main shaft can be transmitted to the extension shaft. The locking mechanism can lock the extension length between the two to avoid mutual sliding between the two during work, thereby ensuring production safety.

[0057] Specifically, the main rotating shaft and the extension shaft realize the retraction of the tool, that is, the distance between two adjacent tools is shortened, which is beneficial to reducing the overall volume. In conjunction with the above-mentioned tool disc rotation mechanism, the main rotating shaft can be rotated 90 degrees. When it is stored in the tool magazine in conjunction with the lifting mechanism, the thickness can be reduced, which is beneficial to reducing the overall volume and reducing space occupancy.

[0058] In this embodiment, the locking mechanism includes a disk 41 arranged in the locking mechanism mounting hole 39, the axis of the disk 41 is horizontally arranged, a torsion spring is arranged between the disk 41 and the locking mechanism mounting hole 39, and a button 42 and a locking column 43 are hinged on the disk 41 respectively, and the hinge points of the button 42 and the locking column 43 and the disk 41 are symmetrically arranged about the center of the disk 41, and the locking column 43 is arranged opposite to the locking hole 4.

[0059] In this way, the button is pressed, and the button moves downward, driving the disc to rotate, and the locking column at the other end is lifted to unlock the extension column and the main shaft. The operation is convenient. When locking is required, the button is pressed, and the extension column is pulled to the specified position, and the button is released. Under the action of the torsion spring, the disc presses the locking column into the locking hole to achieve locking.

[0060] Specifically, a compression spring 44 is arranged in the groove opposite to the extension shaft, which can facilitate the ejection of the extension shaft and resist the extension shaft after locking.

[0061] Specifically, the extension shaft 36 includes multiple sections, and the diameter of each stage of the extension shaft 36 decreases in a direction away from the main transmission shaft 14 .

[0062] Specifically, the tool includes a cutter disc 151, a through hole matching the extension shaft 36 is provided on the cutter disc 151, the cutter disc 151 is coaxially fixedly connected with the upper end surface of the extension shaft 36, and a blade 152 is provided extending outward from the cutter disc 151. The tool can be implemented without affecting the extension and retraction of the extension shaft, and the installation strength and the stability of the rotational power are guaranteed.

[0063] Specifically, the blade 152 is connected to the cutter disc 151 by bolts, which can achieve rapid replacement of the blade and stable connection, and has strong versatility.

[0064] In this embodiment, the carrying mechanism includes a back plate 45, and the back plate 45 is connected to the knife magazine 11 and the motor magazine 1 through a disassembly mechanism. A shoulder strap 46 is provided on the other side of the back plate 45, and the shoulder strap 46 includes two shoulder straps. The lower ends of the two shoulder straps 46 are wrapped in a mounting frame 47 on the back plate 45, and the upper end of the shoulder strap 45 is connected to the back plate 45 through a height adjustment mechanism. The height adjustment mechanism includes a plurality of inverted T-shaped through grooves 48 provided on the back plate 45, and the inverted T-shaped through grooves 48 are horizontally arranged. The upper ends of the two shoulder straps 46 are connected through an arc plate 49, and a T-shaped block 5 is provided on the arc plate 49 in the direction facing the back plate 45, and the T-shaped block 5 is slidably arranged in the inverted T-shaped groove 48.

[0065] In this way, the back plate can be removed from the knife compartment and the motor compartment without affecting the use. The curved plate is ergonomic and comfortable. Because the heights of users are different, there is a mismatch in the carrying capacity. The height can be adjusted by adjusting the T-shaped block and different inverted T-slots. It is highly versatile, convenient and fast.

[0066] Specifically, threaded holes are disposed opposite to each other in the inverted T-shaped groove 48 and on the T-shaped block 49 , and bolts are fitted in the threaded holes.

[0067] In this way, a stable connection between the T-shaped block and the inverted T-shaped groove can be achieved, thereby preventing the T-shaped block from slipping out during the climbing process, and providing high safety.

[0068] In this embodiment, an L-shaped pin 51 is provided at the lower end of the back plate 45, and the L-shaped pin 51 is arranged downwardly, and a back plate mounting plate 52 is provided upwardly on the fender 19, and an L-shaped slot is provided on the side wall of the back plate mounting plate 52 opposite to the L-shaped pin 51, and a slide groove 53 is provided on the back plate 45 opposite to the motor compartment 1, and a slider 54 is slidably installed in the slide groove 53, and a return spring 55 is provided between the side wall of the slider 54 and the slide groove, and an L-shaped locking block 56 is provided on the slider 54 opposite to the motor compartment 1, and a receiving groove 57 is provided on the motor compartment 1 opposite to the slide groove 53, and the length of the receiving groove 57 is consistent with that of the slide groove 53, and the depth of the receiving groove 57 is consistent with the thickness of the L-shaped locking block 56, and the side wall of the receiving groove 57 is horizontally extended with a receiving hole 58, and the receiving hole 25 matches the extended section of the L-shaped locking block 56.

[0069] In this way, the L-shaped pin is inserted into the L-shaped slot to fix the bottom of the back panel. By moving the slider, the L-shaped locking block is set opposite the receiving slot. After releasing the slider, the reset spring drives the slider to reset, and at the same time, the L-shaped locking block is inserted into the receiving hole to complete the locking of the back panel, thereby achieving a stable connection between the back panel, the motor compartment and the compartment pipe, which is convenient for carrying.

[0070] In this embodiment, a walking wheel mounting frame 59 is provided between the walking wheel 17 and the knife magazine 11 .

[0071] In this way, the running wheels can be stored and the carrying volume can be reduced.

[0072] Specifically, a plurality of mounting holes are provided on the walking wheel mounting frame, and a threaded shaft is provided on the knife magazine. The threaded shaft passes through any of the mounting holes to adjust the distance between the walking wheel and the ground. Two nut sleeves are provided on the threaded shaft, and the two nut sleeves are respectively provided on both sides of the walking wheel mounting frame to limit the walking wheel mounting frame and fix it after folding.

[0073] Specifically, it also includes a controller, which is a PLC controller. The controller is electrically connected to the drive motor, stepper motor, shaft encoder, first electric push rod and second electric push rod to achieve coordinated cooperation between the various parts and complete the adjustment of folding, unfolding and rotary tillage actions.

[0074] Specifically, the lower end of the knife magazine 11 is disassembled and matched with a knife magazine end cover 6.

[0075] In this way, the knife can be kept wrapped when carried to avoid injury.

[0076] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A portable backpack rotary tiller, characterized in that: It includes a motor compartment, a knife compartment and a carrying mechanism, the motor compartment and the knife compartment are both detachably connected to the carrying mechanism, a telescopic mechanism is arranged between the motor compartment and the knife compartment, a driving motor and a power module are installed in the motor compartment, a transmission box is arranged in the knife compartment, a lifting mechanism is arranged between the transmission box and the knife compartment, a main rotating shaft is arranged in the transmission box, the axis of the main rotating shaft is arranged horizontally, a knife is coaxially connected to the main rotating shaft, the driving motor is connected to the main rotating shaft through a telescopic transmission mechanism, a folding armrest is hinged outwardly of the motor compartment, a walking wheel mounting frame is hinged outwardly of the knife compartment, and walking wheels are arranged on the walking wheel mounting frame; The telescopic mechanism comprises a first electric push rod arranged on the motor compartment, the free end of the first electric push rod is arranged downward, a fender is arranged extending outwardly from the outer side of the knife compartment, and the free end of the first electric push rod is fixedly mounted on the fender; The telescopic transmission mechanism comprises an outer sleeve arranged on the motor magazine and an inner sleeve arranged on the knife magazine respectively, the outer sleeve and the inner sleeve are slidably sleeved, a main transmission shaft is vertically arranged in the outer sleeve, a first gear is coaxially mounted on the main transmission shaft, the main transmission shaft is transmission-connected with the driving motor, a secondary transmission shaft is vertically arranged in the inner sleeve, a second gear is arranged on the secondary transmission shaft, the end of the secondary transmission shaft enters the transmission box and is coaxially arranged with a first bevel gear, a second bevel gear is coaxially arranged on the main rotating shaft, and the first bevel gear is meshed with the second bevel gear for transmission; The lifting mechanism comprises a cylinder fixedly mounted on the transmission box, the auxiliary transmission shaft is rotatably mounted in the cylinder, the top of the cylinder is connected to a fixed plate, the auxiliary transmission shaft is connected to the fixed plate through an interference fit through a bearing, a second electric push rod is mounted on a side of the fixed plate away from the transmission box, the end of the second electric push rod is fixedly connected to a turntable rotatably mounted on the knife magazine, and a through hole is provided on the turntable to accommodate the auxiliary transmission shaft passing through; The turntable is also connected to the cutter disc rotating mechanism, and the cutter disc rotating mechanism includes a third gear coaxially fixedly connected to the turntable, the third gear is provided with a through hole for accommodating the secondary transmission shaft to pass through, the third gear is meshed with a fourth transmission gear for transmission, the fourth transmission gear is transmission-connected to a stepper motor, and the stepper motor is fixedly mounted on the outside of the cutter chamber; The main shaft is also provided with a tool retracting mechanism, which includes extension shafts arranged opposite to each other at both ends of the main shaft, a groove is arranged inwardly on the end surface of the main shaft, a compression spring is arranged in the groove facing the extension shaft, the inner diameter of the groove is consistent with the outer diameter of the extension shaft, the outer surfaces of the groove and the extension shaft are both provided with a V-shaped groove, a roller mounting frame is fixedly installed in the V-shaped groove in the groove, a roller is rotatably installed in the roller mounting frame, and the angle between two adjacent rollers is 90°, a locking mechanism mounting hole is arranged on the main shaft, a locking mechanism is arranged in the locking mechanism mounting hole, and locking holes are arranged in a row on the extension shaft facing the locking mechanism; The locking mechanism comprises a disk arranged in the locking mechanism mounting hole, the axis of the disk is arranged horizontally, a torsion spring is arranged between the disk and the locking mechanism mounting hole, a button and a locking column are hinged on the disk respectively, the hinge points of the button and the locking column with the disk are arranged symmetrically about the center of the disk, and the locking column is arranged directly opposite to the locking hole; The carrying mechanism includes a back plate, which is connected to the knife magazine and the motor magazine through a disassembly mechanism, and a shoulder strap is provided on the other side of the back plate, and the shoulder strap includes two shoulder straps, the lower ends of the two shoulder straps are wrapped in the mounting frame on the back plate, and the upper end of the shoulder strap is connected to the back plate through a height adjustment mechanism, and the height adjustment mechanism includes a plurality of inverted T-shaped through grooves provided on the back plate, the inverted T-shaped through grooves are horizontally provided, and the upper ends of the two shoulder straps are connected through an arc plate, and a T-shaped block is provided on the arc plate in the direction facing the back plate, and the T-shaped block is slidably provided in the inverted T-shaped groove.

2. A portable backpack rotary tiller according to claim 1, characterized in that: An L-shaped pin is provided at the lower end of the back plate, and the L-shaped pin is arranged downwardly; a back plate mounting plate is provided upwardly on the fender; an L-shaped slot is provided on the side wall of the back plate mounting plate opposite to the L-shaped pin; a slide groove is provided on the back plate opposite to the motor compartment; a slider is slidably installed in the slide groove; a return spring is provided between the side wall of the slider and the slide groove; an L-shaped locking block is provided on the slider opposite to the motor compartment; a receiving groove is provided on the motor compartment opposite to the slide groove; the receiving groove is consistent with the length of the slide groove, the depth of the receiving groove is consistent with the thickness of the L-shaped locking block, and a receiving hole is horizontally extended on the side wall of the receiving groove, and the receiving hole matches the extension section of the L-shaped locking block.

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