Rotary tillage cutter of mini-tiller

Abstract

The utility model relates to a mini-tiller, and discloses a rotary tillage cutter of a mini-tiller, which comprises a rotating shaft, a cutter sleeve is sleeved on the outer side of the rotating shaft, four limit strips are fixedly mounted on the outer side of the rotating shaft in an array manner, chutes are arranged in the cutter sleeve corresponding to the limit strips, an inserting hole is arranged on the outer side of the rotating shaft, and the inserting hole is communicated with the cutter sleeve. A sliding hole is formed in the position, corresponding to the inserting hole, of the cutter cylinder sleeve, a locking assembly is arranged in the sliding hole, and an adjusting assembly for installing and adjusting the length of the rotary blade is arranged in the movable chamber. By pushing the cutter cylinder sleeve to slide along the rotating shaft, the inserting rod is pressed to drive the lantern ring to compress the compression spring until the compression spring moves to the inserting hole, at the moment, the inserting rod is driven to be inserted into the inserting hole under the action of the compression spring, then the rotary blade is locked and positioned, and after the pulling plate is pulled to pull the inserting rod out of the inserting hole, the locking and positioning effect is not achieved any more. Therefore, the rotary blade can be conveniently dismounted and taken down, and the rotary blade can be conveniently mounted, dismounted, maintained or replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-tillers, in particular to a rotary tillage tool for a micro-tiller. Background Technique

[0002] A micro-tiller is a small-scale tillage machine powered by a small diesel engine or gasoline engine. It has the characteristics of light weight, small volume, and simple structure. The micro-tiller can move freely in the field, which is convenient for users to use and store, eliminating the trouble that large agricultural machinery cannot enter mountain fields, and greatly reducing people's working intensity.

[0003] The existing rotary tillage tools of micro-tillers are usually directly welded on the walking shaft, or sleeved on the walking shaft through a cutter barrel sleeve and then fixed and installed through bolts. When the tool is damaged during rotary tillage and needs to be disassembled for repair or replacement, the welded rotary tillage tool needs to be disassembled as a whole, and for the rotary tillage tool fixed by bolts, the bolts are prone to rust, resulting in inconvenient disassembly. Therefore, further improvement can be made. Content of the Utility Model

[0004] To solve the above-mentioned problems, the utility model provides the following technical solution: A rotary tillage tool for a micro-tiller, including a rotating shaft, a cutter barrel sleeve is sleeved on the outside of the rotating shaft, four groups of mounting shells are fixedly installed on the outside of the cutter barrel sleeve in an array, a rotary blade is fixedly installed inside the mounting shell, four limiting strips are fixedly installed on the outside of the rotating shaft in an array, a sliding groove is opened in the cutter barrel sleeve corresponding to the limiting strip, and the cutter barrel sleeve is restricted from rotating along the limiting strip through the sliding groove. A jack is opened on the outside of the rotating shaft, a sliding hole is opened in the cutter barrel sleeve corresponding to the jack, a locking component is arranged in the sliding hole, an activity chamber is opened inside the bottom of the mounting shell, and an adjusting component for installing and adjusting the length of the rotary blade is arranged in the activity chamber.

[0005] As an optimization, the locking component includes a plug inserted into the sliding hole, a collar is fixedly installed on the outside of the plug located inside the sliding hole, a compression spring is fixedly installed between the collar and the top wall of the sliding hole, and a pulling plate is fixedly installed at the top of the plug.

[0006] As an optimization, the plug and the jack are on the same axis, the collar is slidably connected inside the sliding hole, the compression spring is sleeved on the outside of the plug, and the plug is inserted into the jack under the action of the elastic force of the compression spring. When the plug moves to the jack, the elastic force of the compression spring itself will cause the plug to be inserted into the jack, thereby playing a positioning role in locking the cutter barrel sleeve.

[0007] As an optimization, the adjusting component includes a screw rod rotatably connected inside the installation shell, and a connecting rod is fixedly installed at the bottom end of the screw rod. The connecting rod penetrates into the activity room and is fixedly installed with a first bevel gear. A second bevel gear is rotatably connected to the side wall of the activity room, and the second bevel gear is meshed and connected with the first bevel gear. A runner is fixedly installed at the center of the side surface of the second bevel gear.

[0008] As an optimization, a thread groove matching the screw rod is opened inside the rotary blade, and the screw rod is threadedly connected in the thread groove. By rotating the screw rod counterclockwise in the thread groove of the rotary blade, the rotary blade will gradually move downward along the inner wall of the installation shell and be installed inside, thereby playing a role in limiting the installation of the rotary blade.

[0009] As an optimization, a ball is embedded at the bottom of the screw rod. Six balls are arranged around the screw rod in an array, and the balls abut against the inner wall of the installation shell. When the screw rod rotates, it will drive the balls to roll along the bottom wall of the installation shell, thereby reducing the friction force.

[0010] As an optimization, the adjusting component further has a hexagonal rod. A hexagonal groove matching the hexagonal rod is opened on one side of the front surface of the runner, and the end of the hexagonal rod can be inserted into the hexagonal groove. By inserting the hexagonal rod into the hexagonal groove and rotating, the second bevel gear can be driven to rotate by the runner, and then the first bevel gear meshed with the second bevel gear will drive the screw rod to rotate, thus facilitating the adjustment.

[0011] The beneficial effects of the present utility model: For the rotary tillage tool of this micro-tiller, by pushing the cutter barrel sleeve to slide along the rotating shaft, since the limiting strip is located in the sliding groove, the rotation of the cutter barrel sleeve will be restricted. At the same time, when the inserting rod is pressed, it will drive the collar to compress the compression spring until it moves to the jack. At this time, under the action of the compression spring, the inserting rod will be driven to insert into the jack, and then the rotary tillage knife will be locked and positioned. After pulling the pull plate to pull the inserting rod out of the jack, the locking and positioning function will no longer be exerted, and then the rotary tillage knife can be conveniently disassembled and removed, thus facilitating the installation, disassembly, repair or replacement of the rotary tillage knife; by rotating the runner, the second bevel gear will be driven to rotate, so the first bevel gear meshed with the second bevel gear will rotate clockwise in the thread groove of the rotary blade, and then the rotary blade will slide outwards along the inner wall of the installation shell, so the exposed length of the rotary blade will be extended. On the contrary, the exposed length of the rotary blade will be reduced, thereby being able to adjust the depth of the rotary tillage land. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the present utility model;

[0013] Figure 2 It is a schematic structural diagram of the rotating shaft of the present utility model;

[0014] Figure 3Schematic diagram of the rotary tillage knife structure of the present utility model;

[0015] Figure 4 Schematic diagram of the locking structure of the present utility model;

[0016] Figure 5 Schematic diagram of the adjustment structure of the present utility model.

[0017] In the figure: 1, rotating shaft; 2, cutter barrel sleeve; 3, mounting shell; 4, rotary blade; 5, limiting strip; 6, jack; 7, inserting rod; 8, collar; 9, compression spring; 10, pulling plate; 11, screw rod; 12, bevel gear one; 13, bevel gear two; 14, runner. Specific implementation mode

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1-3 , a rotary tillage tool for a micro-tiller, comprising a rotating shaft 1, a cutter barrel sleeve 2 is sleeved outside the rotating shaft 1, four groups of mounting shells 3 are fixedly installed in an array on the outside of the cutter barrel sleeve 2, a rotary blade 4 is fixedly installed inside the mounting shell 3, four limiting strips 5 are fixedly installed in an array on the outside of the rotating shaft 1, a chute is opened in the cutter barrel sleeve 2 corresponding to the limiting strip 5, and the cutter barrel sleeve 2 is restricted from rotating along the limiting strip 5 through the chute. A jack 6 is opened on the outside of the rotating shaft 1, a sliding hole is opened in the cutter barrel sleeve 2 corresponding to the jack 6, and a locking component is arranged in the sliding hole. An activity chamber is opened in the bottom of the mounting shell 3, and an adjusting component for installing and adjusting the length of the rotary blade 4 is arranged in the activity chamber;

[0020] Please refer to Figure 4 , the locking component includes an inserting rod 7 slidably inserted into the sliding hole. The inserting rod 7 and the jack 6 are located on the same axis. A collar 8 is fixedly installed on the outside of the inserting rod 7 inside the sliding hole. The collar 8 is slidably connected to the inside of the sliding hole. A compression spring 9 is fixedly installed between the collar 8 and the top wall of the sliding hole. The compression spring 9 is sleeved outside the inserting rod 7. The inserting rod 7 is inserted into the jack 6 under the action of the elastic force of the compression spring 9. A pulling plate 10 is fixedly installed at the top of the inserting rod 7. When the inserting rod 7 moves to the jack 6, the elastic force of the compression spring 9 itself will cause the inserting rod 7 to be inserted into the jack 6, thereby playing a positioning role in locking the cutter barrel sleeve 2;

[0021] Please refer to Figure 5, The adjusting component includes a screw rod 11 rotatably connected inside the mounting shell 3. A threaded groove matching the screw rod 11 is formed inside the rotary blade 4. The screw rod 11 is threadedly connected in the threaded groove. By rotating the screw rod 11 counterclockwise in the threaded groove of the rotary blade 4, the rotary blade 4 will gradually move downward along the inner wall of the mounting shell 3 and be installed inside, thus playing a role in limiting the installation of the rotary blade 4. And as the screw rod 11 is rotated counterclockwise, it will drive the rotary blade 4 to move outward, thereby facilitating the adjustment of the length of the rotary blade 4 and being able to change the tillage depth;

[0022] Please refer to Figure 5 , A ball is embedded at the bottom of the screw rod 11. Six balls are arranged in an array around the screw rod 11, and the balls abut against the inner wall of the mounting shell 3. When the screw rod 11 rotates, it will drive the balls to roll along the bottom wall of the mounting shell 3, thereby being able to reduce the friction and facilitating the free rotation of the screw rod 11;

[0023] Please refer to Figure 5 , A connecting rod is fixedly installed at the bottom end of the screw rod 11, and the connecting rod penetrates into the activity room and a first bevel gear 12 is fixedly installed. A second bevel gear 13 is rotatably connected to the side wall of the activity room, and the second bevel gear 13 is meshed with the first bevel gear 12. A runner 14 is fixedly installed at the center of the side of the second bevel gear 13. The adjusting component also has a hexagonal rod. A hexagonal groove matching the hexagonal rod is formed on one side of the front of the runner 14. The end of the hexagonal rod can be inserted into the hexagonal groove. By inserting the hexagonal rod into the hexagonal groove and rotating it, the second bevel gear 13 can be driven to rotate by the runner 14, and then the screw rod 11 will be driven to rotate by the first bevel gear 12 meshed with the second bevel gear 13, thus facilitating the adjustment.

[0024] During installation, the rotary blade 4 is inserted into the mounting shell 3, and the threaded groove inside the rotary blade 4 is aligned with the screw rod 11. Then the hexagonal rod is inserted into the hexagonal groove of the runner 14. By rotating the hexagonal rod, the runner 14 can be driven to rotate. Therefore, the second bevel gear 13 drives the first bevel gear 12 to rotate counterclockwise. As the first bevel gear 12 rotates counterclockwise in the threaded groove of the rotary blade 4, it will drive the rotary blade 4 to slide downward along the inner wall of the mounting shell 3, thereby being able to position the installation of the rotary blade 4;

[0025] By sequentially installing the four rotary blades 4 into the mounting shell 3 through the above steps, a complete rotary tillage knife will be assembled. Then the cutter barrel sleeve 2 is sleeved on the outer side of the rotating shaft 1, and the limiting strip 5 is located in the sliding groove. Then the cutter barrel sleeve 2 is pushed to slide along the rotating shaft 1 to the designated position. At this time, the insertion rod 7 is pressed and moves upward, and then drives the collar 8 to compress the compression spring 9 until it moves to the position corresponding to the insertion hole 6 of the insertion rod 7. Under the action of the compression spring 9, the insertion rod 7 will be driven to insert into the insertion hole 6, thereby locking and positioning the rotary tillage knife;

[0026] When disassembly is required for maintenance or replacement, simply pull the pull plate 10 to pull out the plug rod 7 from the jack 6. At this time, it no longer plays a locking and positioning role, and thus it is convenient to disassemble and remove the rotary tillage blade.

[0027] When it is necessary to adjust the tillage depth, just insert the hexagonal rod into the hexagonal groove of the rotating wheel 14, and then rotate the hexagonal rod to drive the rotating wheel 14 to rotate. Therefore, the second bevel gear 13 will be driven to rotate, and then the first bevel gear 12 meshed with the second bevel gear 13 will be driven to rotate clockwise. The first bevel gear 12 rotates clockwise in the threaded groove in the rotary blade 4, which will drive the rotary blade 4 to slide outward along the inner wall of the mounting shell 3. Thus, the length of the rotary blade 4 exposed can be extended, and the tillage depth can be made deeper. On the contrary, the length of the rotary blade 4 exposed can be reduced, making the tillage depth shallower.

[0028] To sum up, for the rotary tillage tool of this micro-tiller, by pushing the cutter barrel sleeve 2 to slide along the rotating shaft 1, since the limiting strip 5 is located in the sliding groove, the rotation of the cutter barrel sleeve 2 will be restricted. At the same time, when the plug rod 7 is pressed, it will drive the collar 8 to compress the compression spring 9 until it moves to the jack 6. At this time, under the action of the compression spring 9, the plug rod 7 will be driven to insert into the jack 6, and then the rotary tillage blade will be locked and positioned. After pulling the pull plate 10 to pull out the plug rod 7 from the jack 6, it no longer plays a locking and positioning role, and thus it is convenient to disassemble and remove the rotary tillage blade, facilitating the installation, disassembly, maintenance or replacement of the rotary tillage blade.

[0029] By rotating the rotating wheel 14, the second bevel gear 13 will be driven to rotate. Therefore, the first bevel gear 12 meshed with the second bevel gear 13 will rotate clockwise in the threaded groove in the rotary blade 4, and then the rotary blade 4 will be driven to slide outward along the inner wall of the mounting shell 3. So, the length of the rotary blade 4 exposed can be extended, and conversely, the length of the rotary blade 4 exposed can be reduced, thereby being able to adjust the tillage depth.

Claims

1. A rotary tillage tool for a micro-tillage machine, comprising a rotating shaft (1), characterized in that: The outer side of the rotating shaft (1) is provided with a knife barrel sleeve (2), and four groups of mounting shells (3) are fixedly installed in an array on the outer side of the knife barrel sleeve (2), and a rotary blade (4) is fixedly installed inside the mounting shell (3). Four limiting strips (5) are fixedly installed in an array on the outer side of the rotating shaft (1), and a sliding groove is provided inside the knife barrel sleeve (2) corresponding to the limiting strip (5), and the knife barrel sleeve (2) is restricted from rotating along the limiting strip (5) through the sliding groove. A plug hole (6) is provided on the outer side of the rotating shaft (1), and a sliding hole is provided at a position corresponding to the plug hole (6), and a locking component is provided in the sliding hole. An activity chamber is provided in the bottom of the mounting shell (3), and an adjustment component for installing and adjusting the length of the rotary blade (4) is provided in the activity chamber.

2. The rotary tillage tool for a micro-tillage machine according to claim 1, characterized in that: The locking assembly comprises an insertion rod (7) slidably inserted in the sliding hole, a collar (8) is fixedly mounted on the outer side of the insertion rod (7) located inside the sliding hole, a compression spring (9) is fixedly mounted between the collar (8) and the top wall of the sliding hole, and a pull plate (10) is fixedly mounted on the top end of the insertion rod (7).

3. The rotary tillage tool for a micro-tillage machine according to claim 2, characterized in that: The insertion rod (7) and the insertion hole (6) are located on the same axis, the collar (8) is slidably connected inside the sliding hole, the compression spring (9) is sleeved on the outside of the insertion rod (7), and the insertion rod (7) is inserted into the insertion hole (6) under the action of the elastic force of the compression spring (9).

4. The rotary tillage tool for a micro-tillage machine according to claim 1, characterized in that: The adjustment assembly comprises a screw rod (11) rotatably connected to the inside of the mounting shell (3), a connecting rod being fixedly mounted on the bottom end of the screw rod (11), and the connecting rod passing through the activity chamber and being fixedly mounted with a bevel gear 1 (12), a side wall of the activity chamber being rotatably connected with a bevel gear 2 (13), and the bevel gear 2 (13) and the bevel gear 1 (12) being meshingly connected, and a rotating wheel (14) being fixedly mounted on the side center of the bevel gear 2 (13).

5. The rotary tillage tool for a micro-tillage machine according to claim 4, characterized in that: A thread groove matching the screw rod (11) is provided inside the rotary blade (4), and the screw rod (11) is threadedly connected in the thread groove.

6. The rotary tillage tool for a micro-tillage machine according to claim 5, characterized in that: A ball bearing is embedded at the bottom of the screw rod (11), six balls are arranged in an array around the screw rod (11), and the balls abut against the inner wall of the mounting shell (3).

7. The rotary tillage tool for a micro-tillage machine according to claim 5, characterized in that: The adjustment component also has a hexagonal rod, and a hexagonal groove matching the hexagonal rod is provided on one side of the front face of the rotating wheel (14), and the end of the hexagonal rod can be inserted into the hexagonal groove.

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