Turning structure for mini-tiller

Abstract

The utility model provides a turning structure for a mini-tiller. The turning structure comprises a machine head part, a support frame, an auxiliary wheel, a first gearbox and a steering mechanism, on the basis of not changing the original structure of the two-drive mini-tiller, the steering mechanism for controlling the rotation direction or the rotation speed of the auxiliary wheel is added; turning or turning of the mini-tiller is achieved by controlling the rotating speed difference or the rotating direction of the two auxiliary wheels; therefore, the mode that a handle is manually controlled to achieve turning or reversing of the mini-tiller is omitted, the turning or reversing angle of the mini-tiller is reduced to a great extent, and the mini-tiller can be well used even in narrow areas.

Description

TECHNICAL FIELD

[0001] The utility model relates to a micro ploughing machine equipment technical field, concretely relates to a turning structure for micro ploughing machine. BACKGROUND

[0002] In the existing cultivation operation, two drive micro ploughing machines are loved by farmers in Sichuan, Guizhou, Yunnan and other mountainous and steep field areas because of the characteristics of being cheap and durable and being able to cultivate some places where medium and large micro ploughing machines cannot reach, basically every family has such a micro ploughing machine, the existing micro ploughing machine is generally divided into two working modes when being used, one is that people follow the micro ploughing machine to work, and the other is that people ride on the micro ploughing machine to work, in the two working modes, most of the micro ploughing machines only make the micro ploughing machine turn and reverse by driving the handle of the micro ploughing machine, but because the weight of the head of the micro ploughing machine is large, the operator consumes a lot of physical strength, at the same time, the handle control makes the micro ploughing machine need a large angle to turn and reverse, and the limitation is large in a relatively small area. SUMMARY

[0003] The utility model discloses a turning structure for micro ploughing machine to solve the problem in the background art. To achieve the above object, the utility model provides the following technical scheme: including the support frame that is connected with the head part, the auxiliary wheel is fixedly connected on the support frame, the first gearbox is connected with the output shaft of the head part, further including the steering mechanism that is connected with the output shaft of the first gearbox and is used for controlling the rotation direction or the rotating speed of the auxiliary wheel, the steering mechanism is fixedly connected on the support frame, and the output end of the steering mechanism is connected with the rotating shaft of the auxiliary wheel.

[0004] Further, the first bevel gear is fixedly connected on the output end of the first gearbox, the steering mechanism includes the first support that is fixedly connected on the support frame, the second bevel gear and the third bevel gear that are coaxial are rotatably connected on the first support, the second bevel gear and the second bevel gear are engaged with the first bevel gear, the first support cylinder is further fixedly connected on the first support, the first rotating shaft is rotatably connected on the first support cylinder, the top of the first rotating shaft is rotatably connected with the inside of the second bevel gear, the bottom of the first rotating shaft is connected with the rotating shaft through the gear transmission structure, the first reversing mechanism is arranged between the second bevel gear and the third bevel gear, and the first output cylinder of the first reversing mechanism is connected between the first rotating shaft.

[0005] Further, the first reversing mechanism comprises a first reversing plate, the first output cylinder in rotation connection with the first reversing plate, the first output cylinder being internally provided with first internal teeth, the first output cylinder being externally provided with first external teeth, the outer circle of the first rotation shaft being provided with second external teeth in mesh with the first internal teeth, the second bevel gear and the third bevel gear being internally provided with second internal teeth in mesh with the first external teeth, the first reversing plate being fixedly connected with a first reversing rod, the first reversing plate and the first support being provided with a first spring, one end of the first spring being fixedly connected with the first reversing plate, the other end of the first spring being fixedly connected with the first support.

[0006] Further, the first support is provided with a first threaded boss, the first support cylinder being in threaded connection with the first threaded boss.

[0007] Further, the support frame is fixedly connected with a seat, the seat being higher than the first gearbox.

[0008] Further, the output end of the first gearbox is fixedly connected with a fourth bevel gear, the steering mechanism comprising a second support fixedly connected with the support frame, the second support being in rotation connection with a fifth bevel gear and a sixth bevel gear with coinciding axes, the fifth bevel gear and the sixth bevel gear being in mesh with a seventh bevel gear fixedly connected with the end of the rotation shaft, the second support being further fixedly connected with a second support cylinder, the second support cylinder being in rotation connection with a second rotation shaft, the bottom of the second rotation shaft being in rotation connection with the inside of the fifth bevel gear, the top of the second rotation shaft being connected with the fourth bevel gear through an eighth bevel gear, the fifth bevel gear and the sixth bevel gear being provided with a second reversing mechanism, the second output cylinder of the second reversing mechanism and the second rotation shaft, the end of the second output cylinder and the inner hole of the fifth bevel gear or the sixth bevel gear being connected through internal and external teeth.

[0009] Further, the second reversing mechanism comprises a second reversing plate, the second output cylinder in rotation connection with the second reversing plate, the second output cylinder being internally provided with third internal teeth, the second output cylinder being externally provided with third external teeth, the outer circle of the second rotation shaft being provided with third external teeth in mesh with the third internal teeth, the fifth bevel gear and the sixth bevel gear being internally provided with fourth internal teeth in mesh with the third external teeth, the second reversing plate being fixedly connected with a second reversing rod, the second reversing plate and the second support being provided with a second spring, one end of the second spring being fixedly connected with the second reversing plate, the other end of the second spring being fixedly connected with the second support.

[0010] Further, the second support is provided with a second threaded boss, the second support cylinder being in threaded connection with the second threaded boss.

[0011] Further, the steering mechanism comprises a second gearbox connected with the output end of the first gearbox, the output end of the second gearbox is fixed with the rotating shaft, the first gearbox is internally provided with a differential, the input end of the second gearbox is higher than the output end, and brake assemblies are arranged on the two output ends of the first gearbox.

[0012] Further, the support frame is fixed with two symmetrically distributed third gearboxes, the output end of the third gearbox is fixed with the auxiliary wheel, and a driving assembly for controlling the rotating speed of the output end of the third gearbox is fixed to the top of the third gearbox.

[0013] Compared with the prior art, the utility model has the beneficial effects of:

[0014] The utility model discloses a steering mechanism for controlling the rotating direction or rotating speed of the auxiliary wheel is added on the basis of not changing the original structure of the two-drive mini-tiller, the rotating speed difference or rotating direction difference of the two auxiliary wheels is controlled, so that the mini-tiller can turn or make a U-turn, and the manual control handle for realizing the turning or reversing of the mini-tiller is cancelled, the turning or reversing angle of the mini-tiller is greatly reduced, and the mini-tiller can be well used in narrow areas. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0016] Figure 1 It is the whole structure schematic diagram of embodiment 1;

[0017] Figure 2 It is the whole structure schematic diagram of embodiment 1;

[0018] Figure 3 It is the whole structure schematic diagram of embodiment 1;

[0019] Figure 4 It is the whole structure schematic diagram of embodiment 2;

[0020] Figure 5 It is the whole structure schematic diagram of embodiment 3;

[0021] Figure 6 It is the whole structure schematic diagram of embodiment 4.

[0022] Wherein: 1, head part; 2, support frame; 3, auxiliary wheel; 4, steering mechanism; 5, seat; 6, first gearbox; 7, handle; 8, first reversing rod; 9, second helical gear; 10, first output cylinder; 11, third helical gear; 12, first support cylinder; 13, first rotating shaft; 14, gear transmission structure; 15, first support; 16, first reversing plate; 17, first spring; 18, first helical gear; 19, first outer tooth; 20, second inner tooth; 21, second outer tooth; 22, first threaded boss; 23, fourth helical gear; 24, seventh helical gear; 25, brake assembly; 26, second gearbox; 27, third gearbox; 28, driving assembly; 29, control console. DETAILED DESCRIPTION

[0023] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0024] Embodiment 1: please refer to Figures 1-3 A turning structure for a micro tiller, comprising a support frame 2 connected with a head part 1, an auxiliary wheel 3 fixedly connected on the support frame 2, a first gearbox 6 connected with an output shaft of the head part 1, and a steering mechanism 4 connected with an output shaft of the first gearbox 6 and used for controlling the rotating direction or rotating speed of the auxiliary wheel 3, the steering mechanism 4 is fixedly connected on the support frame 2, and the output end of the steering mechanism 4 is connected with the rotating shaft of the auxiliary wheel 3. Therefore, the utility model controls the rotating speed difference or rotating direction difference of the two auxiliary wheels 3 through the steering mechanism 4, so as to realize the turning or U-turn of the micro tiller, and the manual control handle 7 is cancelled to realize the turning or reversing of the micro tiller, and the rotating speed difference or rotating direction difference of the two auxiliary wheels 3 is adopted, which greatly reduces the turning or reversing angle of the micro tiller, and the rotating direction difference of the two auxiliary wheels 3 can realize the U-turn in place, so that the utility model greatly saves the physical strength of the operator, and simultaneously reduces the turning and U-turn angles of the micro tiller, and the micro tiller can be well used in a narrow area.

[0025] In the embodiment, the first bevel gear 18 is fixed on the output end of the first gearbox 6, the steering mechanism 4 comprises the first support 15 fixed on the support frame 2, the first support 15 is rotatably connected with the second bevel gear 9 and the third bevel gear 11 with the same axis, the second bevel gear 9 and the third bevel gear 9 are both engaged with the first bevel gear 18, the first support 15 is further fixed with the first support cylinder 12, the first support cylinder 12 is rotatably connected with the first rotating shaft 13, the top of the first rotating shaft 13 is rotatably connected with the inside of the second bevel gear 9, the bottom of the first rotating shaft 13 is connected with the rotating shaft through the gear transmission structure 14, the first reversing mechanism is arranged between the second bevel gear 9 and the third bevel gear 11, the first output cylinder 10 of the first reversing mechanism is connected with the first rotating shaft 13 through the inner and outer teeth, and the end of the first output cylinder 10 is connected with the inner hole of the second bevel gear 9 or the third bevel gear 11 through the inner and outer teeth, the first reversing mechanism comprises the first reversing plate 16 and the first output cylinder 10 rotatably connected with the first reversing plate 16, the inside of the first output cylinder 10 is provided with the first inner teeth, the outside of the first output cylinder 10 is provided with the first outer teeth 19, the outer circle of the first rotating shaft 13 is provided with the second outer teeth 21 engaged with the first inner teeth, the inside of the second bevel gear 9 and the third bevel gear 11 is provided with the second inner teeth 20 engaged with the first outer teeth 19, the first reversing plate 16 is fixed with the first reversing rod 8, the first spring 17 is arranged between the first reversing plate 16 and the first support 15, one end of the first spring 17 is fixed with the first reversing plate 16, and the other end is fixed with the first support 15, wherein the rotating mode described above can adopt the bearing connection mode, which will not be described in detail here; therefore, in the initial state, that is, when the auxiliary wheel 3 rotates forward, the second inner teeth 20 in the inside of the third bevel gear 11 are engaged with the first outer teeth 19 at the lower end of the first rotating shaft 13, when it is needed to turn or make a U-turn, the first reversing rod 8 is pulled, the first reversing plate 16 moves upward, the second inner teeth 20 in the inside of the third bevel gear 11 are separated from the first outer teeth 19 at the lower end of the first rotating shaft 13, then the second inner teeth 20 in the inside of the second bevel gear 9 are engaged with the first outer teeth 19 at the upper end of the first rotating shaft 13, so as to realize the reverse rotation of the first rotating shaft 13, and further realize the reverse rotation of the auxiliary wheel 3; the first support 15 is provided with the first threaded boss 22, the first support cylinder 12 is threadedly connected with the first threaded boss 22, so as to facilitate the installation and maintenance of the steering mechanism 4; the seat 5 is fixed on the support frame 2, and the seat 5 is higher than the first gearbox 6, so that the operator can operate more easily; in addition, the plurality of bevel gears in the embodiment are immersed in the oil tank, so as to prevent the soil from adhering to the bevel gears and ensure the lubrication in the gear engagement, since the specific structure of the steering mechanism 4 is displayed, the specific structure and position of the oil tank are not shown in the drawings; the first output cylinder 10, the second bevel gear 9 and the third bevel gear 11 can be replaced with the traditional clutch friction plate or magnet, wherein the reversing of the magnet and the clutch friction plate is smoother, the reversing can be performed without stopping, and the torque overload protection is further provided;One of the second bevel gear 9 and the third bevel gear 11 is fixedly connected with the first support 15, and the fixed bevel gear is not engaged with the first bevel gear 18, thereby forming a locking mechanism, equivalent to a brake, when the first output cylinder 10 is engaged with the fixed bevel gear, the auxiliary wheel 3 is in a locked state, and when the first output cylinder 10 is engaged with the other rotating bevel gear, it is in a working state, at this time, the two auxiliary wheels can also produce a speed difference to turn; when the first output cylinder 10 is between the second bevel gear 9 and the third bevel gear 11, that is, the first output cylinder 10 is not engaged with the second inner tooth 20, there is also a speed difference between the two auxiliary wheels, thereby realizing turning or U-turn.

[0026] The working principle of embodiment 1: when turning or U-turn is needed, only the first reversing rod 8 needs to be pulled to make the first reversing plate 16 move upwards, so that the second inner tooth 20 inside the third bevel gear 11 is separated from the first outer tooth 19 at the lower end of the first rotating shaft 13, and then the first reversing rod 8 is continuously pulled to make the second inner tooth 20 inside the second bevel gear 9 engage with the first outer tooth 19 at the upper end of the first rotating shaft 13, thereby realizing the reverse rotation of the first rotating shaft 13, and then realizing the reverse rotation of the auxiliary wheel 3, so that the rotating directions of the two auxiliary wheels 3 are opposite; thereby realizing the turning or U-turn of the mini-cultivator, when the turning or U-turn is finished, only the first reversing rod 8 needs to be released, the first reversing plate 16 moves downwards under the action of the spring, so that the second inner tooth 20 inside the second bevel gear 9 is separated from the first outer tooth 19 at the upper end of the first rotating shaft 13, and the second inner tooth 20 inside the third bevel gear 11 is engaged with the first outer tooth 19 at the lower end of the first rotating shaft 13, so that the rotating directions of the two auxiliary wheels 3 are the same; therefore, the utility cancels the manual control handle 7 to realize the turning or reversing of the mini-cultivator, greatly saving the operator's physical strength, and reducing the turning or reversing angle of the mini-cultivator, so that the mini-cultivator can be well used in a small area.

[0027] Embodiment 2: please refer to Figure 4A turning structure for a micro tiller, which is different from the embodiment 1 in that a fourth helical gear 23 is fixed on the output end of the first gearbox 6, the turning mechanism 4 comprises a second support fixed on the support frame 2, a fifth helical gear and a sixth helical gear with coinciding axes are rotatably connected on the second support, the fifth helical gear and the sixth helical gear are both engaged with a seventh helical gear 24 fixed on the end of the rotating shaft, a second support cylinder is also fixed on the second support, a second rotating shaft is rotatably connected on the second support cylinder, the bottom of the second rotating shaft is rotatably connected with the inside of the fifth helical gear, the top of the second rotating shaft is connected with the fourth helical gear 23 through an eighth helical gear, a second reversing mechanism is arranged between the fifth helical gear and the sixth helical gear, the second output cylinder of the second reversing mechanism and the second rotating shaft, and the end of the second output cylinder and the inner hole of the fifth helical gear or the sixth helical gear are all connected through inner and outer teeth, the second reversing mechanism comprises a second reversing plate and a second output cylinder rotatably connected with the second reversing plate, the inside of the second output cylinder is provided with a third inner tooth, the outside of the second output cylinder is provided with a third outer tooth, the outer circle of the second rotating shaft is provided with a third outer tooth engaged with the third inner tooth, the inside of the fifth helical gear and the sixth helical gear is provided with a fourth inner tooth engaged with the third outer tooth, a second reversing rod is fixed on the second reversing plate, a second spring is arranged between the second reversing plate and the second support, one end of the second spring is fixed with the second reversing plate, and the other end is fixed with the second support, a second threaded boss is arranged on the second support, and the second support cylinder is threadedly connected with the second threaded boss, so as to realize the auxiliary forward rotation and reverse rotation; the structure of the embodiment 2 is basically the same as that of the embodiment 1, the difference is that the input end and the output end of the two are opposite, so the detailed description is not repeated here, and the comparison can be made by referring to the drawings Figure 1 and the drawings Figure 2 .

[0028] Embodiment 3: please refer to Figure 5A turning structure for a micro tiller, which is different from the embodiment 1 in that the turning mechanism comprises a second gearbox 26 connected with the output end of the first gearbox 6, the output end of the second gearbox 26 is fixedly connected with the rotating shaft, the inside of the first gearbox is provided with a differential, the input end of the second gearbox 26 is higher than the output end, and the two output ends of the first gearbox 6 are both provided with brake assemblies 25, wherein the differential and the brake assembly 25 are conventional differentials and brake assemblies in the form of brake pads, the combination of the differential and the brake assembly 25 makes the rotating speed of the output ends of the two ends of the first gearbox 6 inconsistent when the brake assembly at one end is started, so that the rotating speed of the two auxiliary wheels 3 is inconsistent, thereby achieving the effect of turning or U-turn, thereby reducing the labor intensity of the workers, wherein the brake assembly 25 can adopt a common speed adjusting part, which will not be described here in detail; the brake assembly 25 of the embodiment is arranged to be higher, which can effectively prevent the damage of soil to the brake assembly 25, and the design of the second gearbox 26 can effectively reduce the braking strength in the brake assembly 25, thereby improving the service life of the brake assembly 25; in addition, in other embodiments, the first gearbox 6 and the second gearbox 26 can be replaced by the switching, speed changing and braking of the forward and reverse rotation of the electric motor, hydraulic motor or pneumatic motor, and only the related electronic elements and related electromagnetic switches need to be installed to remotely control the micro tiller turning, U-turn and walking, so as to realize unmanned operation, and the seat can be cancelled at this time; in addition, the first gearbox 6 and the second gearbox 26 can be arranged as a whole, or the first gearbox 6, the second gearbox 26 and the gearbox of the head part of the micro tiller can be arranged as a whole, so that the structure of the micro tiller is more compact, and in other embodiments, the support frame 2 is also provided with a functional interface, which can be mounted with a film laminating machine, a furrow plough, a pesticide spraying machine and the like.

[0029] Embodiment 4: please refer to Figure 6 A turning structure for a micro tiller, which is different from the embodiment 1 in that the support frame 2 is fixedly connected with two symmetrical third gearboxes 27, the output end of the third gearbox 27 is fixedly connected with the auxiliary wheel 3, and the top of the third gearbox 27 is fixedly connected with a driving assembly 28 for controlling the rotating speed of the output end of the third gearbox 27, wherein the driving assembly 28 can adopt the form of an electric motor, as long as it can realize the speed control or rotating direction control of the output end of the third gearbox 27, which will not be described here in detail, the rotating speed difference or rotating direction difference of the two auxiliary wheels 3 is controlled, so as to realize the turning or U-turn of the micro tiller; thereby the manual control handle 7 for realizing the turning or reversing of the micro tiller is cancelled, which greatly reduces the turning or reversing angle of the micro tiller, and the micro tiller can be well used in a small area, and in addition, the support frame 2 of the embodiment is also provided with a control console 29, which is convenient for adjusting the rotating direction and rotating speed of the two electric motors.

[0030] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "upper," "lower," "left," "right," "front," "back," and similar expressions used in this document are for illustrative purposes only.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A turning structure for use in a mini-tiller, comprising a support frame connected with a machine head, a support frame being fixedly connected with an auxiliary wheel, a first gearbox connected with an output shaft of the machine head, characterized in that: The steering mechanism is fixed to the support frame, an output end of the steering mechanism is connected with the rotating shaft of the auxiliary wheel, a first helical gear is fixed to the output end of the first gearbox, the steering mechanism comprises a first support frame fixed to the support frame, a second helical gear and a third helical gear with coinciding axes are rotatably connected to the first support frame, the second helical gear and the third helical gear are engaged with the first helical gear, a first supporting cylinder is further fixed to the first support frame, a first rotating shaft is rotatably connected to the first supporting cylinder, a top of the first rotating shaft is rotatably connected with the inside of the second helical gear, a bottom of the first rotating shaft is connected with the rotating shaft through gear transmission structure, a first reversing mechanism is arranged between the second helical gear and the third helical gear, and the first output cylinder of the first reversing mechanism and the first rotating shaft, and the end of the first output cylinder and the inner hole of the second helical gear or the third helical gear are connected through inner and outer teeth.

2. The turning structure for use in a mini-tiller as claimed in claim 1, wherein: The first reversing mechanism comprises a first reversing plate and the first output cylinder rotatably connected with the first reversing plate, the inside of the first output cylinder is provided with first inner teeth, the outside of the first output cylinder is provided with first outer teeth, the outer circle of the first rotating shaft is provided with second outer teeth engaged with the first inner teeth, the inside of the second helical gear and the third helical gear is provided with second inner teeth engaged with the first outer teeth, the first reversing plate is fixed with a first reversing rod, a first spring is arranged between the first reversing plate and the first support frame, one end of the first spring is fixed with the first reversing plate, and the other end is fixed with the first support frame.

3. The turning structure for use in a mini-tiller as claimed in claim 1, wherein: The first support frame is provided with a first threaded boss, and the first supporting cylinder is threadedly connected with the first threaded boss.

4. The turning structure for use in a mini-tiller as claimed in claim 1, wherein: The output end of the first gearbox is fixed with a fourth helical gear, the steering mechanism comprises a second support frame fixed to the support frame, a fifth helical gear and a sixth helical gear with coinciding axes are rotatably connected to the second support frame, the fifth helical gear and the sixth helical gear are engaged with a seventh helical gear fixed to the end of the rotating shaft, a second supporting cylinder is further fixed to the second support frame, a second rotating shaft is rotatably connected to the second supporting cylinder, a bottom of the second rotating shaft is rotatably connected with the inside of the fifth helical gear, a top of the second rotating shaft is connected with the fourth helical gear through an eighth helical gear, a second reversing mechanism is arranged between the fifth helical gear and the sixth helical gear, a second output cylinder of the second reversing mechanism and the second rotating shaft, and an end of the second output cylinder and the inner hole of the fifth helical gear or the sixth helical gear are connected through inner and outer teeth.

5. The turning structure for use in a mini-tiller as claimed in claim 4, wherein: The second reversing mechanism comprises a second reversing plate, and the second output cylinder in rotation connection with the second reversing plate, the inside of the second output cylinder is provided with third internal teeth, the outside of the second output cylinder is provided with third external teeth, the outer circle of the second rotation shaft is provided with third external teeth in mesh with the third internal teeth, the inside of the fifth bevel gear and the sixth bevel gear is provided with fourth internal teeth in mesh with the third external teeth, the second reversing plate is fixedly connected with a second reversing rod, the second reversing plate and the second support are provided with a second spring, one end of the second spring is fixedly connected with the second reversing plate, and the other end is fixedly connected with the second support.

6. The turning structure for use in a mini-tiller as claimed in claim 4, wherein: The second support is provided with a second threaded boss, and the second support cylinder is in threaded connection with the second threaded boss.

7. The turning structure for use in a mini-tiller as claimed in claim 1, wherein: The steering mechanism comprises a second gearbox connected with the output end of the first gearbox, the output end of the second gearbox is fixedly connected with the rotation shaft, the inside of the first gearbox is provided with a differential, the input end of the second gearbox is higher than the output end, and the two output ends of the first gearbox are provided with brake assemblies.

8. The turning structure for use in a mini-tiller according to any one of claims 1 to 7, characterized in that: The support frame is fixedly connected with a seat, and the seat is higher than the first gearbox.

9. The turning structure for use in a mini-tiller as claimed in claim 1, wherein: The support frame is fixedly connected with two symmetrically distributed third gearboxes, the output end of the third gearbox is fixedly connected with the auxiliary wheel, and the top of the third gearbox is fixedly connected with a driving assembly for controlling the rotating speed of the output end of the third gearbox.

Images