Mini-tiller

Abstract

The mini-tiller comprises a mini-tiller body, the mini-tiller body comprises a first shell, a driving assembly, a control assembly and a cutter set, the driving assembly, the control assembly and the cutter set are arranged in the first shell, and the control assembly controls the driving assembly to drive the cutter set to rotate for rotary tillage; the first end of an output shaft of the driving assembly is connected with a cooling fan, the cooling fan is arranged between the control assembly and the driving assembly, the cooling fan comprises a first fan blade and a second fan blade, the cooling fan is provided with the first fan blade and the second fan blade, and the first fan blade can conduct cooling on the control assembly, namely a circuit board. The second fan can dissipate heat of the driving assembly, namely the motor, and the same heat dissipation fan can dissipate heat of a plurality of parts under the condition that the number of heat dissipation devices is small, so that the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural products, and in particular relates to a micro-tillage machine. Background Art

[0002] Rotary tillers are an indispensable part of modern agriculture. In existing agricultural machines, in order to achieve the effect of loosening the soil, a rotary digging knife is usually set to plow the land first, and then a soil crusher is used to cut the soil into pieces. Such agricultural machines have the following defects: 1. The handle height of the machine body cannot be adjusted, and it cannot adapt to users of various heights, resulting in an increase in the force required by the user to push the micro-tiller, affecting the use efficiency; 2. General micro-tillers, such as the prior art CN104350817B provides "A Micro-tiller", which has auxiliary wheels, but the auxiliary wheels will increase the rotary tillage resistance when not in use. Therefore, it is very important to obtain a micro-tiller that overcomes the above defects. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the present invention provides a micro-tillage machine, comprising a micro-tillage machine body, wherein the micro-tillage machine body comprises a first housing, a driving component disposed in the first housing, a control component and a knife group, wherein the control component controls the driving component to drive the knife group to rotate to perform rotary tillage;

[0004] The first end of the output shaft of the driving assembly is connected to a cooling fan, the cooling fan is placed between the control assembly and the driving assembly, and the cooling fan includes a first fan blade and a second fan blade.

[0005] At least one first air outlet is provided on the first shell, and the first fan blade rotates to inhale air from the first air outlet, and the air flows to the cooling fan through the control component to form a first flow channel. At least one second air outlet is provided on the first shell, and the second fan blade rotates to inhale air from the first air outlet, and the air flows to the cooling fan through the drive component to form a second flow channel. The first shell has a third air outlet, and the cooling fan outputs the inhaled air through the third air outlet to form an outlet flow channel.

[0006] The second housing is also provided with at least one air inlet. The first housing is installed in the second housing. Air enters from the air inlet and flows upward to the first air outlet. Air enters from the air inlet and flows downward to the second air outlet. The second housing is provided with at least one air outlet. The third air outlet is connected to the air outlet through an air outlet channel. The second air outlet is arranged near the bottom of the drive assembly.

[0007] Through the above technical solution, since the cooling fan has a first blade and a second blade, the first blade can dissipate heat for the control component, i.e., the circuit board, and the second blade can dissipate heat for the driving component, i.e., the motor. The same cooling fan can dissipate heat for multiple components with fewer cooling devices, thereby increasing the cooling efficiency.

[0008] The first shell includes an upper shell for accommodating a control component, a middle shell for accommodating a cooling fan, and a lower shell for accommodating a driving component. The upper shell, the middle shell, and the lower shell are fixed and connected in sequence. The first air outlet is opened in the upper shell, and the second air outlet is opened in the side wall of the lower shell; the control component includes a circuit board, and the driving component includes a motor.

[0009] It also includes a third shell, a third shell cover detachably connected to the third shell, and a transmission assembly placed in the third shell. The third shell is integrally cast and connected to the first shell or the second shell. The second end of the output shaft of the drive assembly drives the transmission assembly to rotate, and the transmission assembly drives the knife group to rotate.

[0010] Among them, the integrated design of the third shell can not only increase the strength of the shell, but also simplify the assembly.

[0011] The transmission assembly includes a first transmission gear meshed with the second end of the output shaft of the motor, a transmission rod fixed to the first transmission gear, and a second transmission gear fixedly connected to the connecting shaft of the knife group, wherein the second transmission gear meshes with the second end of the transmission rod. The first transmission gear and the second transmission gear are arranged vertically or at other angles.

[0012] The knife group includes a connecting shaft, and the connecting shaft includes a main shaft and at least one extension shaft detachably connected to the main shaft. One end of the extension shaft is inserted into the main shaft or the main shaft is inserted into the extension shaft and fixed by a limit pin. A through hole is set on the third shell, and the main shaft passes through the through hole. A connecting sleeve is matched between the main shaft and the extension shaft, that is, the second transmission gear is fixed on the main shaft, the main shaft is plugged into the connecting sleeve, and the connecting sleeve is plugged into the extension shaft. The limit pin passes through the main shaft, the connecting sleeve and the extension shaft to achieve the fixation of the three. The knife group includes at least one blade group, and the blade group includes a base plate fixed to the connecting shaft and a blade fixed on the base plate in a spiral distribution. The base plate is square, and there are four blades. The base plate is fixed outside the main shaft, the connecting sleeve or the extension shaft. The base plate is fixed to the connecting shaft through a reinforcing connector. It also includes a tiller wheel, which is fixedly connected to the connecting shaft through a connecting column.

[0013] The blade groups are rotated at a certain angle to allow blades from different blade groups to be staggered.

[0014] Through the above technical solution, the above setting of the connecting shaft can adjust the length of the connecting shaft. Different lengths can be selected according to different ridge widths to adapt to different occasions.

[0015] It also includes an armrest assembly connected to the micro-tiller body, the armrest assembly includes a first armrest and a second armrest, the first armrest is fixed to the micro-tiller body, and the second armrest is connected to the first armrest by adjusting a limiting structure to adjust the connection angle between the second armrest and the first armrest; it also includes an auxiliary wheel assembly, the auxiliary wheel assembly is connected to the micro-tiller body through a flip structure to select whether to use the auxiliary wheel assembly.

[0016] Through the above technical solution, the setting of the adjusting limit structure can adjust the angle between the second armrest and the first armrest, adjust the highest height of the second armrest, and adapt to a variety of people.

[0017] The adjustment limit structure includes at least one limit member, which is fixedly connected to the second armrest or the first armrest, and is connected to the first armrest or the second armrest through a first rotating shaft. A plurality of adjustment holes are provided on the limit member, and a second axial hole is provided on the first armrest or the second armrest, and the second axial hole is at least partially connected to at least one adjustment hole. A fastener is inserted into the second axial hole to limit the adjustment angle of the limit member.

[0018] The first armrest or the second armrest is provided with a rotation groove, and the second armrest or the first armrest at least partially forms the first rotation axis and is rotatably arranged in the rotation groove. At least one side wall of the rotation groove forms an elastic arm structure to clamp the second armrest. Several of the adjustment holes are connected, and several of the adjustment holes are arranged with the first rotation axis as the center of the circle. A guard is also included, and a second axis is provided on the limit member, and a long hole is provided on the guard member, and the second axis is arranged at the long hole. A through hole is also provided on the guard member, and the fastener passes through the through hole.

[0019] It also includes a protective cover, a connecting piece extending from one side wall of the rotating groove, the connecting piece is fixed to the protective cover, two sides of the protective cover form extension walls, two limiting pieces are provided and are respectively placed on both sides of the first armrest, and a covering structure is formed between the extension walls.

[0020] Through the above technical solution, the two connecting parts are connected by a connecting portion, and an arc structure is formed above the connecting parts. The arc structure is fixed to the second armrest, wherein the second armrest is U-shaped, and an arc surface is provided on one side of the adjusting part located on the protective cover, and the arc surface is bent with a bent arm to increase the strength of the overall adjusting part.

[0021] The flip structure includes at least one flip member. The flip member is connected to the auxiliary wheel assembly, and the flip member is rotatably connected to the micro-tiller body through a third rotating shaft. A limit pin is connected to the flip member, and a first slot and a second slot are formed on both sides of the third rotating shaft, respectively. The limit pin is placed in the first slot or the second slot to realize the use state and the folding state of the auxiliary wheel assembly.

[0022] The flipping piece is provided with a bending portion to increase the strength of the entire flipping piece.

[0023] A spring is connected between the flipping piece and the micro-tillage machine body, and the spring increases the strength of the flipping piece and the use state.

[0024] The micro-tillage machine body also includes a frame, and the first shell, the second shell and the third shell can be fixed on the frame.

[0025] Compared with the prior art, the present invention has the following advantages: the present invention has a simple structure, and the air enters from the air inlet and is divided into two paths, one path goes up through the first flow channel to take away the heat of the circuit board, and the other path goes down into the bottom of the motor and passes through the second flow channel from bottom to top to take away the heat of the motor. In addition, the third air outlet is larger, which is convenient for heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic cross-sectional view of the first housing portion of the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of air flow;

[0028] Figure 3 This is a schematic cross-sectional view of the knife assembly of the present invention;

[0029] Figure 4 This is a schematic diagram of the cooling fan structure;

[0030] Figure 5 It is a cross-sectional schematic diagram of the present invention;

[0031] Figure 6 The present invention is a three-dimensional Figure 1 ;

[0032] Figure 7 The present invention is a three-dimensional Figure 2 ;

[0033] Figure 8 A partial three-dimensional diagram of the adjustment limit structure;

[0034] Fig. 9 It is a three-dimensional diagram of the flipped structure;

[0035] Fig.10 A side view of the auxiliary wheel assembly of the present invention after being turned over;

[0036] Reference numerals:

[0037] 101 first handrail; 102 second handrail;

[0038] 201 stopper; 202 first rotating shaft; 203 second shaft hole; 204 adjustment hole; 205 rotation slot; 206 elastic arm; 207 second shaft; 208 guard; 209 long hole; 210 through hole; 211 fastener; 212 protective cover; 213 connecting member; 214 extension wall; 215 connecting part; 216 arc structure; 217 bending arm;

[0039] 3 training wheel assembly;

[0040] 401 flip member; 402 third rotating shaft; 403 limit pin; 404 first slot; 405 second slot; 406 bending portion; 407 spring;

[0041] 5 first housing; 501 first air outlet; 502 second air outlet; 503 third air outlet; 504 upper housing; 505 middle housing; 506 lower housing;

[0042] 6 second housing; 601 air inlet; 602 air outlet;

[0043] 7 third housing; 701 third housing cover;

[0044] 8 transmission assembly; 801 first transmission gear; 802 transmission rod; 803 second transmission gear;

[0045] 9 drive assembly; 901 motor;

[0046] 10 control component; 1001 circuit board;

[0047] 11 knife assembly; 1101 connecting shaft; 1102 main shaft; 1103 extension shaft; 1104 stop pin; 1105 connecting sleeve; 1106 base plate; 1107 blade; 1108 tilling wheel; 1109 connecting column;

[0048] 12 cooling fan; 1201 first fan blade; 1202 second fan blade. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the present invention, and thus to more clearly define the scope of the protection claimed in the present invention, the present invention is described in detail with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementations of the present invention, which are only some embodiments of the present invention, wherein the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and each specific feature does not naturally and directly limit the scope of implementation of the present invention.

[0050] Referring to the accompanying drawings, the present invention adopts the following technical scheme: a micro-tillage machine, comprising a micro-tillage machine body, wherein the micro-tillage machine body comprises a first housing 5, a driving component 9 disposed in the first housing 5, a control component 10 and a knife group 11, wherein the control component 10 controls the driving component 9 to drive the knife group 11 to rotate for rotary tillage;

[0051] The first end of the output shaft of the driving assembly 9 is connected to the cooling fan 12, and the cooling fan 12 is placed between the control assembly 10 and the driving assembly 9. The cooling fan 12 includes a first fan blade 1201 and a second fan blade 1202.

[0052] At least one first air outlet 501 is provided on the first shell 5, and the first fan blade 1201 rotates to inhale air from the first air outlet 501, and the air flows to the cooling fan 12 through the control component 10 to form a first flow channel. At least one second air outlet 502 is provided on the first shell 5, and the second fan blade 1202 rotates to inhale air from the first air outlet 501, and the air flows to the cooling fan 12 through the driving component 9 to form a second flow channel. The first shell 5 has a third air outlet 503, and the cooling fan 12 outputs the inhaled air through the third air outlet 503 to form an outlet flow channel.

[0053] The second housing 6 is also provided with at least one air inlet 601. The first housing 5 is installed in the second housing 6. Air enters from the air inlet 601 and flows upward to the first air outlet 501. Air enters from the air inlet 601 and flows downward to the second air outlet 502. The second housing 6 is provided with at least one air outlet 602. The third air outlet 503 is connected to the air outlet 602 through an air outlet channel. The second air outlet 502 is arranged near the bottom of the driving assembly 9.

[0054] Through the above technical solution, since the cooling fan 12 has a first blade 1201 and a second blade 1202, the first blade 1201 can dissipate heat for the control component 10, i.e., the circuit board 1001, and the second fan can dissipate heat for the drive component 9, i.e., the motor 901. The same cooling fan 12 can dissipate heat for multiple components with fewer cooling devices, thereby increasing the cooling efficiency.

[0055] The first fan blade 1201 and the second fan blade 1202 are vertically arranged and staggered.

[0056] The first shell 5 includes an upper shell 504 for accommodating the control component 10, a middle shell 505 for accommodating the cooling fan 12 and a lower shell 506 for accommodating the driving component 9. The upper shell 504, the middle shell 505 and the lower shell 506 are fixed and connected in sequence. The first air outlet 501 is opened in the upper shell 504, and the second air outlet 502 is opened on the side wall of the lower shell 506; the control component 10 includes a circuit board 1001, and the driving component 9 includes a motor 901.

[0057] It also includes a third shell 7, a third shell cover 701 detachably connected to the third shell 7, and a transmission assembly 8 placed in the third shell 7. The third shell 7 is integrally cast and connected to the first shell 5 or the second shell 6. The second end of the output shaft of the driving assembly 9 drives the transmission assembly 8 to rotate, and the transmission assembly 8 drives the knife group 11 to rotate.

[0058] The integrated design of the third housing 7 can not only increase the strength of the housing but also simplify assembly.

[0059] The transmission assembly 8 includes a first transmission gear 801 meshed with the second end of the output shaft of the motor 901, a transmission rod 802 fixed to the first transmission gear 801, and a second transmission gear 803 fixedly connected to the connecting shaft 1101 of the knife group 11, wherein the second transmission gear 803 meshes with the second end of the transmission rod 802. The first transmission gear 801 and the second transmission gear 803 are arranged vertically or at other angles.

[0060] The knife assembly 11 includes a connecting shaft 1101, and the connecting shaft 1101 includes a main shaft 1102 and at least one extension shaft 1103 detachably connected to the main shaft 1102. One end of the extension shaft 1103 is inserted into the main shaft 1102, or the main shaft 1102 is inserted into the extension shaft 1103 and then fixed by a stop pin 1104. A through hole is provided on the third housing 7, and the main shaft 1102 passes through the through hole. A connecting sleeve 1105 is provided between the main shaft 1102 and the extension shaft 1103, that is, the second transmission gear 803 is fixed on the main shaft 1102, the main shaft 1102 is plugged into the connecting sleeve 1105, and the connecting sleeve 1105 is plugged into the extension shaft 1103. The stop pin passes through the main shaft 1102, the connecting sleeve 1105 and the extension shaft 1103 to achieve the fixation of the three. The knife set 11 includes at least one blade set 1107, and the blade set 1107 includes a base plate 1106 fixed to the connecting shaft 1101, and blades 1107 fixed to the base plate 1106 and distributed in a spiral. The base plate 1106 is square, and there are four blades 1107. The base plate 1106 is fixed to the main shaft 1102, the connecting sleeve 1105 or the extension shaft 1103. The base plate 1106 is fixed to the connecting shaft 1101 through a reinforcing connector. It also includes a tiller wheel 1108, and the tiller wheel 1108 is fixedly connected to the connecting shaft 1101 through a connecting column 1109.

[0061] Several blade groups 1107 are rotated at a certain angle so that blades 1107 in different blade groups 1107 are staggered.

[0062] Through the above technical solution, the above setting of the connecting shaft 1101 can adjust the length of the connecting shaft 1101. Different lengths can be selected according to different ridge widths to adapt to different occasions.

[0063] It also includes an armrest assembly connected to the micro-tillage machine body, the armrest assembly includes a first armrest 101 and a second armrest 102, the first armrest 101 is fixed to the micro-tillage machine body, and the second armrest 102 is connected to the first armrest 101 by adjusting the limiting structure to adjust the connection angle between the second armrest 102 and the first armrest 101; it also includes an auxiliary wheel assembly 3, the auxiliary wheel assembly 3 is connected to the micro-tillage machine body through a flip structure to select whether to use the auxiliary wheel assembly 3. In other embodiments, the first armrest 101 may not be provided, that is, the second armrest 102 is directly connected to the micro-tillage machine body by adjusting the limiting structure.

[0064] Through the above technical solution, the setting of the adjusting limit structure can adjust the angle between the second armrest 102 and the first armrest 101, and adjust the highest height of the second armrest 102 to adapt to a variety of people.

[0065] The adjustment limit structure includes at least one limit member 201, which is fixedly connected to the second armrest 102 or the first armrest 101, and is connected to the first armrest 101 or the second armrest 102 via a first rotating shaft 202. A plurality of adjustment holes 204 are provided on the limit member 201, and a second axis 207 hole 203 is provided on the first armrest 101 or the second armrest 102, and the second axis 207 hole 203 is at least partially connected to at least one adjustment hole 204, and a fastener 211 is inserted into the second axis 207 hole 203 to limit the adjustment angle of the limit member 201.

[0066] The first armrest 101 or the second armrest 102 is provided with a rotation groove 205, and the second armrest 102 or the first armrest 101 at least partially forms the first rotation axis 202 and is rotatably arranged in the rotation groove 205. At least one side wall of the rotation groove 205 forms an elastic arm 206 structure to clamp the second armrest 102. Several of the adjustment holes 204 are connected, and the several adjustment holes 204 are arranged with the first rotation axis 202 as the center of the circle. A guard 208 is also included, and a second shaft 207 is provided on the limit member 201, and a long hole 209 is provided on the guard 208, and the second shaft 207 is arranged at the long hole 209. The guard 208 is also provided with a through hole 210, and the fastener 211 passes through the through hole 210.

[0067] It also includes a protective cover 212, a connecting piece 213 extends from one side wall of the rotating groove 205, the connecting piece 213 is fixed to the protective cover 212, and extension walls 214 are formed on both sides of the protective cover 212. The limiting piece 201 is provided with two and is respectively placed on both sides of the first armrest 101, and a covering structure is formed between the extension walls 214.

[0068] Through the above technical solution, the two connecting members 213 are connected by a connecting portion 215, and an arc structure 216 is formed above the connecting member 213. The arc structure 216 is fixed to the second armrest 102, wherein the second armrest 102 is U-shaped, and an arc surface is provided on one side of the adjusting member located on the protective cover 212, and the arc surface is bent with a bending arm 217 to increase the strength of the overall adjusting member.

[0069] In this embodiment, the rotation groove 205 is set on the first armrest 101, and the first rotation shaft 202, that is, part of the second armrest 102, is fixed to the rotating member. In other embodiments, the rotation groove 205 can be opened on the second armrest 102, and the first rotation shaft 202 is fixed on the first armrest 101.

[0070] The flip structure includes at least one flip member 401. The flip member 401 is connected to the auxiliary wheel assembly 3, and the flip member 401 is rotatably connected to the micro-tillage machine body through the third rotating shaft 402. A limit pin 403 is connected to the flip member 401, and a first slot 404 and a second slot 405 are formed on both sides of the third rotating shaft 402, respectively. The limit pin 403 is placed in the first slot 404 or the second slot 405 to realize the use state and the folding state of the auxiliary wheel assembly 3.

[0071] The flip member 401 is provided with a bending portion 406 to increase the strength of the entire flip member 401 .

[0072] A spring 407 is connected between the flipping member 401 and the micro-tillage machine body, and the spring 407 increases the strength of the flipping member and the micro-tillage machine in the use state.

[0073] In this embodiment, there are two flip members 401 , and the two flip members 401 are connected via a third rotating shaft 402 or via a limiting pin 403 .

[0074] For example, the main body of the micro-tillage machine includes a frame, the first armrest 101 is fastened to the frame by a fastener 211 or by welding, and the flip structure is also arranged on the frame.

[0075] Compared with the prior art, the present invention has the following advantages: the present invention has a simple structure, and the air enters from the air inlet and is divided into two paths, one path goes up through the first flow channel to take away the heat of the circuit board, and the other path goes down into the bottom of the motor and passes through the second flow channel from bottom to top to take away the heat of the motor. In addition, the third air outlet is larger, which is convenient for heat dissipation.

[0076] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A micro-tillage machine, characterized in that: The micro-tillage machine comprises a main body, the main body comprising a first housing (5), a drive assembly (9) disposed in the first housing (5), a control assembly (10) and a knife group (11), the control assembly (10) controlling the drive assembly (9) to drive the knife group (11) to rotate for rotary tillage; The first end of the output shaft of the driving component (9) is connected to a cooling fan (12), the cooling fan (12) is disposed between the control component (10) and the driving component (9), and the cooling fan (12) comprises a first fan blade (1201) and a second fan blade (1202), At least one first air outlet (501) is provided on the first shell (5), and the first fan blade (1201) rotates to suck air from the first air outlet (501), and the air flows to the heat dissipation fan (12) through the control component (10) to form a first flow channel; at least one second air outlet (502) is provided on the first shell (5), and the second fan blade (1202) rotates to suck air from the first air outlet (501), and the air flows to the heat dissipation fan (12) through the drive component (9) to form a second flow channel; the first shell (5) has a third air outlet (503), and the heat dissipation fan (12) outputs the sucked air through the third air outlet (503) to form an outlet flow channel.

2. The micro-tillage machine according to claim 1, characterized in that: The invention also comprises a second outer shell (6), wherein at least one air inlet (601) is provided on the second outer shell (6). The first outer shell (5) is installed in the second outer shell (6), and air enters from the air inlet (601) and flows upward to the first air outlet (501), and air enters from the air inlet (601) and flows downward to the second air outlet (502).

3. The micro-tillage machine according to claim 2, characterized in that: At least one air outlet (602) is provided on the second housing (6), and the third air outlet (503) is connected to the air outlet (602) via an air outlet channel; And / or, the second air outlet (502) is arranged close to the bottom of the driving assembly (9).

4. The micro-tillage machine according to claim 1, characterized in that: The direction of the first fan blade (1201) and / or the second fan blade (1202) is consistent with the direction of the output shaft.

5. The micro-tillage machine according to claim 1, characterized in that: The invention also comprises a third housing (7), a third housing cover (701) detachably connected to the third housing (7), and a transmission assembly (8) disposed in the third housing (7); the third housing (7) is integrally cast and connected to the first housing (5) or the second housing (6); the second end of the output shaft of the driving assembly (9) drives the transmission assembly (8) to rotate, and the transmission assembly (8) drives the knife group (11) to rotate.

6. The micro-tillage machine according to claim 1, characterized in that: The first housing (5) comprises an upper housing (504) for accommodating a control component (10), a middle housing (505) for accommodating a cooling fan (12), and a lower housing (506) for accommodating a drive component (9); the upper housing (504), the middle housing (505), and the lower housing (506) are fixed in sequence and connected; the first air outlet (501) is provided on the upper housing (504), and the second air outlet (502) is provided on a side wall of the lower housing (506); the control component (10) comprises a circuit board (1001), and the drive component (9) comprises a motor (901).

7. The micro-tillage machine according to claim 6, characterized in that: The transmission assembly (8) comprises a first transmission gear (801) meshed with the second end of the output shaft of the motor (901), a transmission rod (802) fixed to the first transmission gear (801), and a second transmission gear (803) wheel fixedly connected to the connecting shaft (1101) of the knife assembly (11), wherein the second transmission gear (803) wheel meshes with the second end of the transmission rod (802).

8. The micro-tillage machine according to claim 1, characterized in that: The knife assembly (11) comprises a connecting shaft (1101), wherein the connecting shaft (1101) comprises a main shaft (1102) and at least one extension shaft (1103) detachably connected to the main shaft (1102), wherein one end of the extension shaft (1103) is inserted into the main shaft (1102), or the main shaft (1102) is inserted into the extension shaft (1103) and then fixed by a limit pin (1104).

9. The micro-tillage machine according to claim 7, characterized in that: The knife group (11) comprises at least one blade (1107) group, and the blade (1107) group comprises a base plate (1106) fixed to a connecting shaft (1101), and blades (1107) fixed to the base plate (1106) and distributed in a spiral shape; the base plate (1106) is fixed to the connecting shaft (1101) via a reinforcing connecting piece.

10. The micro-tillage machine according to claim 8, characterized in that: It also includes a tilling wheel (1108), and the tilling wheel (1108) is fixedly connected to the connecting shaft (1101) via a connecting column (1109).

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