Mini-tiller

By adopting a separate upper and lower friction disc design in the clutch transmission system of the mini tiller, and utilizing elastic components and pressure rod components to achieve power transmission and rapid disengagement, the problem of severe wear of the lower friction disc is solved, thereby improving the reliability and safety of the equipment.

CN224124584UActive Publication Date: 2026-04-17XIAN JIAOTONG ENG COLLEGE
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
XIAN JIAOTONG ENG COLLEGE
Filing Date
2025-04-28
Publication Date
2026-04-17

AI Technical Summary

Technical Problem

In the existing clutch transmission system of multi-functional micro-tillers, the lower friction disc is prone to severe wear due to long-term preload, leading to deformation and breakage, which poses a safety hazard.

Method used

The design adopts a separate upper and lower friction disc. By setting a pressure rod component and an elastic component at the bottom of the lower friction disc, the elastic component is used to lift the lower friction disc to contact the upper friction disc and transmit power. When it is necessary to stop, the discs are separated to avoid wear caused by long-term preload.

Benefits of technology

This enables rapid disconnection of power transmission, reduces wear and deformation of the lower friction disc, and improves the service life and safety of the equipment.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224124584U_ABST
    Figure CN224124584U_ABST
Patent Text Reader

Abstract

The utility model discloses a mini-tiller, relates to the technical field of agricultural mechanical equipment, and mainly aims to provide a mini-tiller capable of manually controlling an upper friction disc and a lower friction disc to be quickly separated. According to the main technical scheme, the mini-tiller comprises a rack, an engine is arranged on the upper portion of the rack, a handle component is arranged on the side face of the rack, a power transmission component is arranged in the rack, and one end of the power transmission component is connected to the engine; the clutch component and the upper friction disc are fixedly connected to the other end of the power transmission component, the lower portion of the elastic component is connected to the bottom of the clutch shell, the upper portion of the elastic component abuts against the lower friction disc, one end of the pressing rod component is connected to the handle component, and the other end of the pressing rod component is connected to the side face of the elastic component. One end of a worm body is fixedly connected to the lower friction disc, the side face of the other end of the worm body is connected to the side face of the worm gear part, and the machine tool is connected to the middle of the worm gear part. The ploughing machine is mainly used for ploughing.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery and equipment technology, and in particular to a micro-tiller. Background Technology

[0002] Multi-functional mini tillers are adaptable to different working environments by changing attachments. They are characterized by versatility, light weight, simple structure, and flexibility, and can operate in various conditions. They can largely solve the problems of larger tillage machinery requiring specific terrain and cultivated area, and thus have enormous market potential.

[0003] The main components of existing multi-functional micro-tillers include a power unit, frame, clutch transmission system, and working parts. The power unit provides power, and the clutch transmission system is located inside the frame. Power is transmitted to the working parts through the clutch transmission system, causing the working parts to rotate, thereby achieving the purpose of tilling the land. The existing clutch transmission system uses an upper friction disc and a lower friction disc. The upper friction disc is fixed on the main shaft, and the lower friction disc is fixed on the shift fork. When it is necessary to stop, a preload force is applied to the lower friction disc, and the drive shift fork forms active braking. When the drive clutch disengages, it directly brakes the drive shaft, thereby stopping the rotary tiller blades in time and avoiding unexpected safety accidents. However, this stopping method will cause severe wear on the lower friction disc. At the same time, due to the long-term application of preload force to the lower friction disc, the lower friction disc will deform, leading to breakage and deformation of the lower friction disc. Utility Model Content

[0004] In view of this, the present invention provides a micro-tiller, the main purpose of which is to provide a micro-tiller that allows for the rapid separation of the upper and lower friction discs by manual control.

[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0006] This utility model embodiment provides a micro-tiller, including:

[0007] A frame, wherein an engine is mounted on the upper part of the frame, a handle component is mounted on the side of the frame, a power transmission component is mounted inside the frame, and one end of the power transmission component is connected to the engine;

[0008] A clutch assembly includes a clutch housing, an upper friction disc, a lower friction disc, an elastic component, and a pressure rod component. The upper friction disc, the lower friction disc, and the elastic component are disposed inside the clutch housing. The upper friction disc is fixedly connected to the other end of the power transmission component. The lower part of the elastic component is connected to the bottom of the clutch housing, and the upper part of the elastic component abuts against the lower friction disc. One end of the pressure rod component is connected to the handle component, and the other end is connected to the side of the elastic component.

[0009] The worm gear assembly includes a worm body, a worm wheel assembly, and a tool. One end of the worm body is fixedly connected to the lower friction disc, and the other end is connected to the side of the worm wheel assembly. The tool is connected to the middle of the worm wheel assembly.

[0010] Furthermore, the upper friction disc includes an upper ring body and an upper disc body. A first keyhole is provided on the side of the upper ring body. The upper disc body is fixedly connected to the upper ring body. The outer side of the upper disc body extends outward at an obtuse angle.

[0011] Furthermore, the lower friction disc includes a lower ring body and a lower disc body. The inner side of the lower disc body is fixedly connected to the worm gear body, and the lower disc body is fixedly connected to the lower ring body. The outer side of the lower ring body extends inward at an acute angle.

[0012] Furthermore, the lower ring body has a lower extension ring at its edge, and the upper ring body has an upper extension ring at its edge, with the inner side of the upper extension ring and the outer side of the lower extension ring fitting together.

[0013] Furthermore, the power transmission component includes a first pulley, a second pulley, a belt component, a first transmission shaft, and a second transmission shaft. The first transmission shaft is connected to the output end of the engine. The first pulley is disposed on the first transmission shaft. One end of the second transmission shaft is connected to the second pulley, and the other end extends out of the frame and is connected to the upper friction disc. The belt component is wound between the first pulley and the second pulley.

[0014] Furthermore, a first belt groove is provided on the outer edge of the first belt pulley, and a second belt groove is provided on the edge of the second belt pulley, with the belt component engaging in the first belt groove and the second belt groove.

[0015] Furthermore, the elastic component includes an upper washer, a lower washer, a spring body, and a tapered bearing. The tapered bearing is disposed at the lower part of the clutch housing and sleeved on the outside of the worm gear body. The lower washer is disposed at the upper part of the tapered bearing. The upper washer is disposed at the lower part of the lower friction disc. The spring body is disposed between the upper washer and the lower washer.

[0016] Furthermore, the handle component includes a handle body, a controller, and a clutch cable. The controller is disposed on the handle body, and one end of the clutch cable is connected to the controller, while the other end is connected to the pressure rod component.

[0017] Furthermore, the guide wheel component includes a connecting frame, a guide wheel bracket, and a guide wheel body. The connecting frame is fixedly connected to the clutch housing, and one end of the guide wheel bracket is connected to the connecting frame, while the other end is connected to the guide wheel body.

[0018] Furthermore, a resistance rod is mounted on the connecting frame.

[0019] Compared with the prior art, the present invention has the following technical effects:

[0020] In the technical solution provided by this utility model embodiment, the frame supports the micro-tiller. An engine is mounted on the upper part of the frame, and a handle is mounted on the side of the frame. A power transmission component is housed inside the frame, with one end connected to the engine. The clutch component transmits or disconnects power and includes a clutch housing, an upper friction disc, a lower friction disc, an elastic component, and a pressure rod. The upper friction disc, the lower friction disc, and the elastic component are disposed inside the clutch housing. The upper friction disc is fixedly connected to the other end of the power transmission component, and the lower part of the elastic component is connected to the bottom of the clutch housing. The upper part of the component abuts against the lower friction disc. One end of the pressure rod component is connected to the handle component, and the other end is connected to the side of the elastic component. The worm gear component drives the implement to rotate. The worm gear component includes a worm body, a worm wheel component, and the implement. One end of the worm body is fixedly connected to the lower friction disc, and the other end is connected to the side of the worm wheel component. The implement is connected to the middle of the worm wheel component. Compared with the prior art, the main components of the existing multi-functional micro-tiller include a power unit, a frame, a clutch transmission system, and working parts. The power unit provides power, and the clutch transmission system is set in the frame. Power is transmitted to the machine through the clutch transmission system. The working parts rotate to achieve the purpose of tilling. Existing clutch transmission systems use an upper friction disc and a lower friction disc. The upper friction disc is fixed to the main shaft, and the lower friction disc is fixed to a shift fork. When stopping is required, a preload force is applied to the shift fork to the lower friction disc, using the drive fork to create active braking. When the drive clutch disengages, it directly brakes the drive shaft, thus stopping the rotary tiller blades promptly and avoiding unforeseen safety accidents. However, this stopping method leads to severe wear on the lower friction disc. Furthermore, the long-term application of preload force to the lower friction disc causes deformation, potentially leading to breakage and deformation. In this technical solution… By setting a pressure rod component and an elastic component at the lower part of the lower friction disc, and connecting the power transmission component to the upper friction disc, when tilling is required, the handle component applies external force to the pressure rod component, the pressure rod component releases pressure, and the elastic component lifts the lower friction disc, causing the lower friction disc to contact the upper friction disc. The power transmission component drives the upper friction disc to rotate, the upper friction disc drives the lower friction disc to rotate, and the lower friction disc drives the worm gear body, worm wheel component, and implement to rotate. When the implement needs to stop rotating, the external force of the pressure rod component is released, the pressure rod component lowers the lower friction disc, the upper and lower friction discs separate, the worm gear component stops rotating, while the upper friction disc continues to rotate, thereby achieving the technical effect of quickly disconnecting and controlling the rotation of the implement. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of a micro-tiller provided in an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0023] Figure 3 for Figure 1 Enlarged structural diagram at point B;

[0024] Figure 4 for Figure 1 Schematic diagram of the structure at point C;

[0025] Figure 5 A left-side view of a micro-tiller provided for an embodiment of this utility model.

[0026] Figure 6 This is a top view of a micro-tiller provided in an embodiment of the present invention. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0028] like Figures 1 to 6 As shown, this embodiment of the utility model provides a micro-tiller, including:

[0029] A frame 1 is provided, an engine 11 is provided on the upper part of the frame 1, a handle component 12 is provided on the side of the frame 1, a power transmission component 13 is provided inside the frame 1, and one end of the power transmission component 13 is connected to the engine 11.

[0030] The clutch assembly includes a clutch housing 21, an upper friction disc, a lower friction disc, an elastic component, and a pressure rod component 25. The upper friction disc, lower friction disc, and elastic component are disposed inside the clutch housing 21. The upper friction disc is fixedly connected to the other end of the power transmission component 13. The lower part of the elastic component is connected to the bottom of the clutch housing 21, and the upper part of the elastic component abuts against the lower friction disc. One end of the pressure rod component 25 is connected to the handle component 12, and the other end is connected to the side of the elastic component.

[0031] The worm gear assembly includes a worm body 31, a worm wheel assembly 32, and a tool. One end of the worm body 31 is fixedly connected to the lower friction disc, and the other end is connected to the side of the worm wheel assembly 32. The tool is connected to the middle of the worm wheel assembly 32.

[0032] In the technical solution provided by this utility model embodiment, the frame 1 supports the micro-tiller. An engine 11 is mounted on the upper part of the frame 1, a handle component 12 is mounted on the side of the frame 1, and a power transmission component 13 is mounted inside the frame 1. One end of the power transmission component 13 is connected to the engine 11. The clutch component transmits or disconnects power. The clutch component includes a clutch housing 21, an upper friction disc, a lower friction disc, an elastic component, and a pressure rod component 25. The upper friction disc, lower friction disc, and elastic component are disposed inside the clutch housing 21. The upper friction disc is fixedly connected to the other end of the power transmission component 13. The lower part of the elastic component is connected to the bottom of the clutch housing 21, and the upper part of the elastic component abuts against the lower friction disc. The friction disc and pressure rod component 25 are connected at one end to the handle component 12 and at the other end to the side of the elastic component. The worm gear component drives the implement to rotate. The worm gear component includes a worm body 31, a worm wheel component 32, and the implement. One end of the worm body 31 is fixedly connected to the lower friction disc, and the other end is connected to the side of the worm wheel component 32. The implement is connected to the middle of the worm wheel component 32. Compared with the prior art, the main components of the existing multi-functional micro-tiller include a power unit, a frame 1, a clutch transmission system, and working parts. The power unit provides power, and the clutch transmission system is set in the frame 1. Power is transmitted to the working parts through the clutch transmission system, causing the working parts to rotate. To achieve the purpose of tilling, existing clutch transmission systems use an upper friction disc and a lower friction disc. The upper friction disc is fixed to the main shaft, and the lower friction disc is fixed to the shift fork. When stopping is required, a preload force is applied to the shift fork to the lower friction disc, using the drive shift fork to form active braking. When the drive clutch disengages, it directly brakes the drive shaft, thus stopping the rotary tiller blades in time and avoiding unexpected safety accidents. However, this stopping method leads to severe wear on the lower friction disc. Furthermore, the long-term application of preload force to the lower friction disc causes deformation, potentially leading to breakage and deformation. In this technical solution, a pressure rod component 2 is installed at the lower part of the lower friction disc. 5. The elastic component and the power transmission component 13 are connected to the upper friction plate. When tilling is required, the handle component 12 applies external force to the pressure rod component 25. The pressure rod component 25 releases the pressure, and the elastic component lifts the lower friction plate, so that the lower friction plate contacts the upper friction plate. The power transmission component 13 drives the upper friction plate to rotate, and the upper friction plate drives the lower friction plate to rotate. The lower friction plate drives the worm gear body 31, the worm wheel component 32, and the implement to rotate. When the implement needs to stop rotating, the external force of the pressure rod component 25 is released, and the pressure rod component 25 lowers the lower friction plate. The upper and lower friction plates separate, so that the worm gear component stops rotating, while the upper friction plate continues to rotate, thereby achieving the technical effect of quickly disconnecting and rotating the implement.

[0033] The frame 1 serves to support the micro-tiller. An engine 11 is mounted on the upper part of the frame 1, and a handle component 12 is mounted on the side of the frame 1. A power transmission component 13 is housed inside the frame 1, with one end connected to the engine 11. The engine 11's output end extends into the frame 1 and connects to the power transmission component 13. The clutch component functions to transmit or disconnect power. The clutch component includes a clutch housing 21, an upper friction disc, a lower friction disc, an elastic component, and a pressure rod component 25. The upper friction disc, lower friction disc, and elastic component are located inside the clutch housing 21, and the upper friction disc is fixedly connected to the power transmission component 13. At the other end, the lower part of the elastic component is connected to the bottom of the clutch housing 21, and the upper part of the elastic component abuts against the lower friction disc. One end of the pressure rod component 25 is connected to the handle component 12, and the other end is connected to the side of the elastic component. The upper part of the clutch housing 21 is fixed to the lower part of the frame 1. The upper friction disc is installed at the other end of the power transmission component, which can transmit power and drive the upper friction disc to rotate. The elastic component is located at the lower part of the clutch housing 21, and the lower friction disc is installed at the upper part of the elastic component. The elastic component can push the lower friction disc upward. The pressure rod component 25 presses down on the lower friction disc. When the handle component 12 applies external force, the pressure rod component 25 releases pressure, causing the elastic component to... The force-transmitting component pushes the lower friction disc upward until it contacts the upper friction disc, thus transmitting power. The worm gear component drives the tool to rotate. The worm gear component includes a worm body 31, a worm wheel component 32, and the tool. One end of the worm body 31 is fixedly connected to the lower friction disc, and the other end is connected to the side of the worm wheel component 32. The tool is connected to the middle of the worm wheel component 32. The worm body 31 is fixedly connected to the lower friction disc. When the lower friction disc rotates, it drives the worm body 31 to rotate, which in turn drives the worm wheel component 32 and the tool to rotate. In this technical solution, by setting a pressure rod component 25 and an elastic component at the lower part of the lower friction disc, the power... The transmission component 13 is connected to the upper friction disc. When tilling is required, the handle component 12 applies external force to the pressure rod component 25. The pressure rod component 25 releases the pressure, and the elastic component lifts the lower friction disc, causing the lower friction disc to contact the upper friction disc. The power transmission component 13 drives the upper friction disc to rotate, and the upper friction disc drives the lower friction disc to rotate. The lower friction disc drives the worm gear body 31, the worm wheel component 32, and the implement to rotate. When the implement needs to stop rotating, the external force of the pressure rod component 25 is released, and the pressure rod component 25 lowers the lower friction disc. The upper and lower friction discs separate, causing the worm gear component to stop rotating, while the upper friction disc continues to rotate. This achieves the technical effect of quickly disconnecting and controlling the rotation of the implement.

[0034] Furthermore, the upper friction disc includes an upper ring body 221 and an upper disc body 222. A first keyhole is provided on the side of the upper ring body 221, and the upper disc body 222 is fixedly connected to the upper ring body 221. The outer side of the upper disc body 222 extends outward at an obtuse angle. In this embodiment, the upper friction disc is further defined. The upper ring body 221 and the upper disc body 222 are integrally formed. A first keyhole is provided on the side of the upper ring body 221, and a key is installed in the first keyhole to connect the upper friction disc to the power transmission component 13, thereby fixing the upper friction disc to the power transmission component 13. The obtuse angle outward extension of the outer side of the upper disc body 222 forms an umbrella-shaped structure, thereby increasing the contact area between the upper and lower friction discs. Optionally, the lower friction disc includes a lower ring body 231 and a lower disc body 232. The inner side of the lower disc body 232 is fixedly connected to the worm gear body 31, and the lower disc body 232 is fixedly connected to the worm gear body 31. The lower ring body 231 is attached to the lower ring body 231. The outer side of the lower ring body 231 extends inward at an acute angle. The lower ring body 231 and the lower disc body 232 are integrally formed. The lower ring body 231 is fixedly connected to the worm gear body 31. The lower disc body 232 has a bowl-shaped structure, which makes the outer edge of the lower disc body 232 have more contact area, thereby increasing the contact area between the lower friction disc and the upper friction disc. Specifically, the lower ring body 231 has a lower extension ring 233 on its edge, and the upper ring body 221 has an upper extension ring 223 on its edge. The inner side of the upper extension ring 223 and the outer side of the lower extension ring 233 fit together, thereby achieving the technical effect of further improving the friction between the upper friction disc and the lower friction disc.

[0035] Furthermore, the power transmission component 13 includes a first pulley 131, a second pulley 132, a belt component 133, a first transmission shaft 134, and a second transmission shaft 135. The first transmission shaft 134 is connected to the output end of the engine 11. The first pulley 131 is disposed on the first transmission shaft 134. One end of the second transmission shaft 135 is connected to the second pulley 132, and the other end extends out of the frame 1 and is connected to the upper friction disc. The belt component 133 is wound between the first pulley 131 and the second pulley 132. In this embodiment, the power transmission components are further defined. The first transmission shaft 134 is connected to the output end of the engine 11 via a coupling. The first pulley 131 is mounted on the first transmission shaft 134 via a key. The second transmission shaft 135 is mounted on the frame 1 via a bearing seat. The second pulley 132 is mounted on the second transmission shaft 135 via a key. The belt component 133 is wound between the first pulley 131 and the second pulley 132. When the first transmission shaft 134 rotates, it can drive the first pulley 131 to rotate, and then drive the second pulley 132, the second transmission shaft 135, and the upper friction disc to rotate, thereby achieving the driving effect. The technical effect of rotating the upper friction disc can be achieved by optionally providing a first belt groove on the outer edge of the first belt disc 131 and a second belt groove on the edge of the second belt disc 132. The belt component 133 is inserted into the first and second belt grooves. Multiple first belt grooves are provided on the outer edge of the first belt disc 131, and the cross-section of the first belt groove is trapezoidal. The second belt groove is provided on the edge of the second belt disc 132, and the cross-section of the second belt groove is trapezoidal. The belt component 133 uses an existing non-elastic belt, and the cross-section of the belt component 133 is also trapezoidal, thereby achieving the technical effect of increasing the friction between the belt component 133 and the pulley.

[0036] Furthermore, the elastic component includes an upper washer 241, a lower washer 242, a spring body 243, and a tapered bearing 244. The tapered bearing 244 is disposed at the lower part of the clutch housing 21 and is sleeved on the outside of the worm gear body 31. The lower washer 242 is disposed at the upper part of the tapered bearing 244. The upper washer 241 is disposed at the lower part of the lower friction disc. The spring body 243 is disposed between the upper washer 241 and the lower washer 242. In this embodiment, the elastic component is further defined. The spring body 243 is disposed between the upper washer 241 and the lower washer 242. The tapered bearing 244 is installed in the lower part of the clutch housing 21. The worm gear body 31 passes through the tapered bearing 244, the lower washer 242, the spring body 243 and the upper washer 241 from bottom to top and is connected to the lower friction disc. After applying external force to the pressure rod component 25, the pressure rod component 25 drives the upper washer 241 to move downward, causing the lower friction disc to disengage from the upper friction disc, thereby achieving the technical effect of quickly disengaging the lower friction disc from the upper friction disc. Specifically, the pressure rod component includes a pressure rod body 251 and an operating rod 252. One end of the pressure rod body 251 is connected to the operating rod 252, and the other end is abutted against the upper part of the upper washer 241. After applying external force to the operating rod 252, the pressure rod body 251 rotates, causing the upper washer 241 to move downward, thereby achieving the technical effect of quickly disengaging the lower friction disc from the upper friction disc.

[0037] Furthermore, the handle component 12 includes a handle body 121, a controller 123, and a clutch cable 122. The controller 123 is mounted on the handle body 121, and one end of the clutch cable 122 is connected to the controller 123, while the other end is connected to the pressure lever component 25. In this embodiment, the handle component 12 is further defined. The handle body 121 is mounted on the frame 1, and the controller 123 is mounted on the handle body 121 for easy operation. One end of the clutch cable 122 is connected to the controller 123, and the other end is connected to the pressure lever component 25. When tilling is required, the operator squeezes the controller 123, and the pressure lever component 25 releases pressure, causing the lower friction disc to move upward under the action of the elastic component, so that the lower friction disc and the upper friction disc come into contact. When tilling needs to be stopped, the operator releases the controller 123, the pressure lever component 25 returns to its initial position, the movable bearing seat moves downward and squeezes the elastic component, causing the lower friction disc to disengage from the upper friction disc, thereby achieving the technical effect of quickly disengaging the lower friction disc from the upper friction disc.

[0038] Furthermore, the guide wheel component includes a connecting frame 41, a guide wheel bracket 42, and a guide wheel body 43. The connecting frame 41 is fixedly connected to the clutch housing 21, and one end of the guide wheel bracket 42 is connected to the connecting frame 41, while the other end is connected to the guide wheel body 43. In this embodiment, the guide wheel component is further defined. The connecting frame 41 is installed outside the clutch housing 21, and one end of the guide wheel bracket 42 is fixedly connected to the connecting frame 1, while the other end is equipped with the guide wheel body 43. This allows the micro-tiller to be guided. Optionally, a resistance rod 5 is added, which is installed on the connecting frame 41, enabling the micro-tiller to control the depth of rotary tillage, thereby achieving the technical effect of conveniently adjusting the tillage depth.

[0039] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A mini-tiller characterized by, include: A frame, wherein an engine is mounted on the upper part of the frame, a handle component is mounted on the side of the frame, a power transmission component is mounted inside the frame, and one end of the power transmission component is connected to the engine; A clutch assembly includes a clutch housing, an upper friction disc, a lower friction disc, an elastic component, and a pressure rod component. The upper friction disc, the lower friction disc, and the elastic component are disposed inside the clutch housing. The upper friction disc is fixedly connected to the other end of the power transmission component. The lower part of the elastic component is connected to the bottom of the clutch housing, and the upper part of the elastic component abuts against the lower friction disc. One end of the pressure rod component is connected to the handle component, and the other end is connected to the side of the elastic component. The worm gear assembly includes a worm body, a worm wheel assembly, and a tool. One end of the worm body is fixedly connected to the lower friction disc, and the other end is connected to the side of the worm wheel assembly. The tool is connected to the middle of the worm wheel assembly.

2. A micro-tiller according to claim 1, characterized in that, The upper friction disc includes an upper ring body and an upper disc body. A first keyhole is provided on the side of the upper ring body. The upper disc body is fixedly connected to the upper ring body. The outer side of the upper disc body extends outward at an obtuse angle.

3. A micro-tiller according to claim 2, characterized in that, The lower friction disc includes a lower ring body and a lower disc body. The inner side of the lower disc body is fixedly connected to the worm gear body, and the lower disc body is fixedly connected to the lower ring body. The outer side of the lower ring body extends inward at an acute angle.

4. A micro-tiller according to claim 3, characterized in that, The lower ring body has a lower extension ring at its edge, and the upper ring body has an upper extension ring at its edge. The inner side of the upper extension ring and the outer side of the lower extension ring are in contact with each other.

5. A micro-tiller according to any one of claims 1 to 4, characterized in that, The power transmission component includes a first pulley, a second pulley, a belt component, a first transmission shaft, and a second transmission shaft. The first transmission shaft is connected to the output end of the engine. The first pulley is disposed on the first transmission shaft. One end of the second transmission shaft is connected to the second pulley, and the other end extends out of the frame and is connected to the upper friction disc. The belt component is wound between the first pulley and the second pulley.

6. A micro-tiller according to claim 5, characterized in that, The outer edge of the first pulley is provided with a first belt groove, and the edge of the second pulley is provided with a second belt groove. The belt component is inserted into the first belt groove and the second belt groove.

7. A micro-tiller according to any one of claims 1 to 4, characterized in that, The elastic component includes an upper washer, a lower washer, a spring body, and a tapered bearing. The tapered bearing is located at the lower part of the clutch housing and is sleeved on the outside of the worm gear body. The lower washer is located at the upper part of the tapered bearing. The upper washer is located at the lower part of the lower friction disc. The spring body is located between the upper washer and the lower washer.

8. A micro-tiller according to any one of claims 1 to 4, characterized in that, The handle component includes a handle body, a controller, and a clutch cable. The controller is mounted on the handle body, and one end of the clutch cable is connected to the controller, while the other end is connected to the lever component.

9. A mini-tiller as claimed in any one of claims 1 to 4, wherein, Also includes: A guide wheel assembly, comprising a connecting frame, a guide wheel bracket, and a guide wheel body, wherein the connecting frame is fixedly connected to the clutch housing, and one end of the guide wheel bracket is connected to the connecting frame and the other end is connected to the guide wheel body.

10. The mini-tiller as claimed in claim 9, wherein, Also includes: A resistance rod is mounted on the connecting frame.