A mini-tiller with quick-change blades

Abstract

This utility model relates to the field of agricultural machinery technology, and in particular to a mini-tiller with quick-change blades. It solves the problem that in existing technologies, the snap-fit ​​structure is prone to loosening due to vibration or torque impact, causing the blades to detach from the mounting base, posing a serious safety hazard. Furthermore, this structure lacks effective anti-loosening measures, relying solely on spring force to maintain the connection, which is prone to fatigue failure after prolonged use, further reducing connection reliability. A mini-tiller with quick-change blades includes a push frame, a drive module connected to the top of the push frame, and a transmission module connected to the bottom of the push frame. This utility model, by setting a positioning block that cooperates with a fixing column and using positioning screws for reinforcement, and simultaneously utilizing magnetic attraction to enhance connection strength, combined with a double-locking design of the positioning plate and fixing plate, effectively prevents the blades from loosening and falling off during operation, improves the overall structure's vibration resistance and load-bearing capacity, and ensures safety and reliability under high-intensity operation.

Description

Technical Field

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

[0002] Mini tillers are small agricultural machines widely used in small to medium-sized farmland operations such as farmland, orchards, and vegetable gardens. They are primarily used for tasks such as loosening soil, tilling, weeding, and ditching. Characterized by their small size, light weight, flexible operation, and strong adaptability, they are important tools in modern agricultural production for improving labor efficiency and reducing manual labor intensity. In practical use, because different operating scenarios require different blade shapes and functions, mini tillers often need to frequently change different types of blades. Therefore, a structural design that allows for quick blade changes has become an important technological direction for improving their operating efficiency and ease of use.

[0003] Chinese utility model patent CN 218244295 U discloses a mini-tiller with quick-change blades, including a frame and a blade holder. Multiple blade supports are welded to the outer wall of the blade holder, and each blade support has a sleeve on both sides. Inside, a serpentine spring and a limiting plate are installed. The blades are quickly installed and removed through the conical engagement of a locking block and a locking slot. While this structure enables quick blade installation, in actual tillage, especially under high load, strong vibration, or continuous operation, the locking structure is prone to loosening due to vibration or torque impact, causing the blades to fall off the mounting base, posing a serious safety hazard. This structure lacks effective anti-loosening measures, relying solely on spring force to maintain the connection between the locking block and the through hole. After prolonged use, the spring is prone to fatigue and failure, further reducing connection reliability. Simultaneously, the conical structure of the locking block and the locking slot is prone to axial separation under rotational torque, thus increasing the risk of disengagement.

[0004] Therefore, to address the shortcomings of existing technologies, we urgently need a mini-tiller with quickly changeable blades to solve this problem. This new type of mini-tiller should feature robust connections, easy disassembly, and strong vibration resistance, thereby significantly improving blade changing efficiency and operational safety. Simultaneously, it should better meet the demands of modern agricultural mechanization, high efficiency, and safety, providing strong support for the continued development of agricultural machinery, especially small-scale tillage equipment. Utility Model Content

[0005] The purpose of this invention is to provide a mini-tiller with quick blade replacement, which solves the problem that the existing snap-fit ​​structure is prone to loosening due to vibration or torque impact, causing the blade to fall off the mounting base and posing a serious safety hazard. This structure lacks effective anti-loosening measures and relies solely on spring force to maintain the connection between the snap-fit ​​block and the through hole. After long-term use, the spring is prone to fatigue failure, further reducing the reliability of the connection.

[0006] To achieve the above objectives, this utility model provides a micro-tiller with quick-change blades, including a push frame, a drive module connected to the top of the push frame, and a transmission module connected to the bottom of the push frame. Both sides of the transmission module are connected to rotating rods via drive shafts. The outer ring of the rotating rods has several insertion slots, and each insertion slot has an insertion rod inserted into it. One side of each insertion rod is connected to several positioning blocks, and a blade can be detachably connected to one side of each positioning block.

[0007] One end of the plug rod is detachably connected to the outer ring of the rotating rod via a positioning structure.

[0008] The positioning block has a positioning hole on one side, and a fixing post that matches the positioning hole is fixedly connected to the bottom end of the blade. A positioning screw with one end threaded through the positioning block is provided on one side of the positioning block, and the end of the positioning screw is connected to the side wall of the fixing post.

[0009] One end of the rotating shaft is fixedly connected to a mounting plate, and one end of the rotating rod is fixedly connected to a connecting plate. The connecting plate is bolted to the mounting plate.

[0010] The bottom end of the fixed column is fixedly connected to a magnetic plate, and the bottom of the positioning hole is connected to a magnetic piece.

[0011] The positioning structure includes a positioning plate and a fixing plate. The fixing plate is connected to the end of the plug rod, and the bottom of the positioning plate is connected to the outer ring of the rotating rod. The fixing plate and the positioning plate are detachably connected.

[0012] The fixing plate has a fixing screw with one end threaded through it on one side, and the positioning plate has a screw hole on one side that matches the fixing screw.

[0013] This utility model discloses a mini-tiller with quick-change blades. By setting a joint groove between the plug rod and the rotating rod, and combining it with a positioning structure, it achieves quick disassembly and secure connection. This not only improves the efficiency of blade replacement, but also significantly enhances the vibration resistance and load-bearing capacity of the connection parts, preventing the blades from accidentally falling off during high-intensity operations, and improving the safety and stability of the entire machine. In addition, the combined design of the plug rod and the positioning block enhances the structural adaptability, enabling it to adapt to the quick replacement needs of various types of blades and meet the diverse applications in different operating scenarios. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the rotating rod and the plug rod according to an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the transmission module and mounting plate according to an embodiment of the present utility model.

[0018] Figure 4 This is a schematic diagram of the rotating rod and the insertion slot according to an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the positioning block and the plug-in rod according to an embodiment of the present invention.

[0020] In the diagram: 1. Push frame; 2. Drive module; 3. Rotating rod; 4. Rotating wheel assembly; 5. Blade; 6. Transmission module; 7. Mounting plate; 8. Connecting plate; 9. Positioning plate; 10. Insertion slot; 11. Fixing plate; 12. Positioning block; 13. Magnet plate; 14. Fixing column; 15. Positioning screw; 16. Insertion rod. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Example 1

[0023] Please see Figure 1-5 As shown, a mini-tiller with quick-change blades according to this embodiment includes a push frame 1, a drive module 2 connected to the top of the push frame 1, and a transmission module 6 connected to the bottom of the push frame 1. Both sides of the transmission module 6 are connected to rotating rods 3 via drive shafts. The outer ring of the rotating rod 3 is provided with several insertion slots 10. Each insertion slot 10 is connected to an insertion rod 16. Several positioning blocks 12 are connected to one side of the insertion rod 16. Each positioning block 12 can be detachably connected to a blade 5 on one side. A rotating wheel set 4 is connected to one side of the bottom of the push frame 1.

[0024] One end of the plug rod 16 is detachably connected to the outer ring of the rotating rod 3 via a positioning structure.

[0025] During use, the user controls the tiller to move forward or turn by pushing the frame 1. The drive module 2 transmits power to the transmission module 6, which drives the rotating rod 3 to rotate via the drive shafts on both sides, thereby driving the blades 5 mounted on its outer ring to perform tillage operations. When it is necessary to change to a different type of blade, the operator can apply external force to the plug rod 16 to pull it out of the plug slot 10 on the outer ring of the rotating rod 3, and then remove the original blades 5 on the plug rod 16 and replace them with new blades suitable for the current operation. During this process, the plug rod 16 and the rotating rod 3 are detachably connected through a positioning structure. This positioning structure ensures that the plug rod 16 remains stable and fixed under high-speed rotation and high-load operation, preventing it from falling off due to vibration or torque impact. At the same time, the positioning block 12 connected to one side of the plug rod 16 further enhances the connection strength between it and the rotating rod 3, improving the overall structure's vibration resistance and load-bearing capacity.

[0026] Example 2

[0027] Please see Figure 1-5 As shown in the figure, a mini-tiller with quick-change blades in this embodiment has a positioning hole on one side of the positioning block 12. The bottom end of the blade 5 is fixedly connected to a fixing post 14 that matches the positioning hole. A positioning screw 15 with one end threaded through the positioning block 12 is provided on one side of the positioning block 12. The end of the positioning screw 15 is connected to the side wall of the fixing post 14. Specifically, through the cooperation between the positioning block 12, the fixing post 14 and the positioning screw 15, when changing the blade 5, the fixing post 14 is inserted into the positioning hole of the positioning block 12 and the positioning screw 15 is tightened so that it abuts against the side wall of the fixing post 14, thereby realizing the quick installation and firm fixation of the blade 5, achieving the effect of improving the stability of the blade connection and preventing loosening and falling off during operation.

[0028] A magnet plate 13 is fixedly connected to the bottom end of the fixing post 14, and a magnet piece is connected to the bottom of the positioning hole. Specifically, through the magnetic attraction between the magnet plate 13 at the bottom of the fixing post 14 and the magnet piece inside the positioning hole, after the blade 5 is inserted into the positioning block 12, the magnetic force helps to enhance the connection strength, further preventing the blade from shifting or falling off in a vibration environment, thus achieving the effect of improving the installation stability and vibration resistance of the blade.

[0029] Example 3

[0030] Please see Figure 1-5As shown in this embodiment, a mini-tiller with quick-change blades has a mounting plate 7 fixedly connected to one end of the rotating shaft, and a connecting plate 8 fixedly connected to one end of the rotating rod 3. The connecting plate 8 is bolted to the mounting plate 7. Specifically, through the cooperation between the mounting plate 7, the connecting plate 8, and the bolts, the rotating rod 3 can be quickly separated from or securely connected to the transmission module 6 by tightening or loosening the bolts during assembly or disassembly. This achieves the effect of improving structural maintainability and facilitating the replacement of rotating rods 3 of different specifications to adapt to diverse operational needs.

[0031] The positioning structure includes a positioning plate 9 and a fixing plate 11. The fixing plate 11 is connected to the end of the insertion rod 16, and the bottom of the positioning plate 9 is connected to the outer ring of the rotating rod 3. The fixing plate 11 and the positioning plate 9 are detachably connected. Specifically, through the detachable connection between the positioning plate 9 and the fixing plate 11, after the insertion rod 16 is inserted into the insertion slot 10, the position of the insertion rod 16 is further locked by the connection between the fixing plate 11 and the positioning plate 9, thereby enhancing the overall rigidity and torsional resistance of the insertion structure, achieving the effect of improving connection reliability and preventing dislodgement during high-speed rotation.

[0032] A fixing screw with one end threaded through the fixing plate 11 is provided on one side of the fixing plate 11. A screw hole adapted to the fixing screw is provided on one side of the positioning plate 9. Specifically, through the matching between the fixing screw and the screw hole on the positioning plate 9, after the installation of the plug-in rod 16 is completed, the fixing screw is tightened so that it enters the screw hole and presses the positioning plate 9, thereby achieving secondary locking of the plug-in rod 16, which enhances the anti-loosening performance of the structure and ensures the safety of high-intensity operation.

[0033] During use, the user controls the tiller to move forward or turn by pushing the frame 1. The drive module 2 transmits power to the transmission module 6. The transmission module 6 drives the rotating rod 3 to rotate through the transmission shafts on both sides, thereby driving the blades 5 installed on its outer ring to perform tillage operations. When it is necessary to change to a different type of blade, the operator can apply external force to the plug rod 16 to pull it out of the plug groove 10 on the outer ring of the rotating rod 3. Then, the original blades 5 on the plug rod 16 can be removed and replaced with new blades suitable for the current operation. During this process, the plug rod 16 and the rotating rod 3 are detachably connected through a positioning structure. Specifically, a positioning hole is opened on one side of the positioning block 12, and a fixing post 14 that matches the positioning hole is fixedly connected to the bottom end of the blade 5. A positioning screw 15 with one end threaded through the positioning block 12 is provided on one side of the positioning block 12. The end of the positioning screw 15 is connected to the side wall of the fixing post 14. The fitting arrangement between the fixing post 14 and the positioning screw 15 allows for quick and secure installation of the blade 5 when replacing the blade 5. The fixing post 14 is inserted into the positioning hole of the positioning block 12, and the positioning screw 15 is tightened to abut against the side wall of the fixing post 14. Furthermore, a magnetic plate 13 is fixedly connected to the bottom end of the fixing post 14, and a magnetic piece is connected to the bottom of the positioning hole, further enhancing the connection strength of the blade 5 through magnetic attraction. Simultaneously, multiple positioning blocks 12 connected to one side of the insertion rod 16 enhance the connection strength between it and the rotating rod 3, improving the overall structure's vibration resistance and load-bearing capacity. The positioning structure includes a positioning plate 9 and a fixing plate 11. The fixing plate 11 is connected to the end of the insertion rod 16, and the bottom of the positioning plate 9 is connected to the outer ring of the rotating rod 3. The fixing plate 11 and the positioning plate 9 are locked secondary by the fixing screw and the screw hole on the positioning plate 9, ensuring that the insertion rod 16 remains stable under high-speed rotation and high-load operation.

[0034] This utility model provides a quick-change blade micro-tiller that effectively solves the safety hazards of loose blade connection, easy detachment, and decreased reliability due to spring fatigue failure in existing technologies. First, the coordinated arrangement of the positioning block 12, fixing post 14, and positioning screw 15 enables quick installation and secure fixing of the blade 5, improving blade connection stability and preventing loosening and detachment during operation. Second, the magnetic attraction between the magnetic plate 13 at the bottom of the fixing post 14 and the magnetic piece inside the positioning hole further enhances the installation stability and vibration resistance of the blade. Third, the detachable connection between the positioning plate 9 and the fixing plate 11 enhances the overall rigidity and torsional resistance of the plug-in structure, improving connection reliability and preventing detachment during high-speed rotation. Finally, the engagement between the fixing screw and the screw hole on the positioning plate 9 achieves secondary locking of the plug-in rod 16, enhancing the structure's anti-loosening performance and ensuring safety during high-intensity operation.

[0035] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A mini-tiller with quick-change blades, characterized in that, include: The push frame, the drive module connected to the top of the push frame, and the transmission module connected to the bottom of the push frame are provided. Both sides of the transmission module are connected to rotating rods via transmission shafts. The outer ring of the rotating rod is provided with several insertion slots. Each insertion slot is connected to an insertion rod. One side of the insertion rod is connected to several positioning blocks. Each positioning block can be detachably connected to a blade on one side. One end of the plug rod is detachably connected to the outer ring of the rotating rod via a positioning structure.

2. A mini-tiller with quick-change blades according to claim 1, characterized in that, A positioning hole is provided on one side of the positioning block, and a fixing post that matches the positioning hole is fixedly connected to the bottom end of the blade. A positioning screw with one end threaded through the positioning block is provided on one side of the positioning block, and the end of the positioning screw is connected to the side wall of the fixing post.

3. A mini-tiller with quick-change blades according to claim 1, characterized in that, One end of the rotating shaft is fixedly connected to a mounting plate, and one end of the rotating rod is fixedly connected to a connecting plate. The connecting plate is bolted to the mounting plate.

4. A mini-tiller with quick-change blades according to claim 2, characterized in that, A magnet plate is fixedly connected to the bottom end of the fixed column, and a magnet piece is connected to the bottom of the positioning hole.

5. A mini-tiller with quick-change blades according to claim 3, characterized in that, The positioning structure includes a positioning plate and a fixing plate. The fixing plate is connected to the end of the plug rod, and the bottom of the positioning plate is connected to the outer ring of the rotating rod. The fixing plate and the positioning plate are detachably connected.

6. A mini-tiller with quick-change blades according to claim 5, characterized in that, One side of the fixing plate is provided with a fixing screw with one end threaded through the fixing plate, and one side of the positioning plate is provided with a screw hole that matches the fixing screw.

Images