Rotary blade switching structure and mini-tiller

Abstract

The invention relates to the technical field of mini-tillers, and discloses a rotary blade switching structure and a mini-tiller, the rotary blade switching structure comprises a mini-tiller output rotating shaft, a fixed sleeve is arranged outside the mini-tiller output rotating shaft, a hexagonal shaft is fixedly mounted on the mini-tiller output rotating shaft, a rotary blade body is slidably arranged outside the fixed sleeve, and the hexagonal shaft and the inner surface of a positioning plate are mutually clamped and connected; and a bearing plate is fixedly mounted on the positioning plate. According to the rotary blade switching structure and the mini-tiller, clamping or clamping releasing between the hexagonal shaft and the positioning plate can be achieved through movement of the bearing plate, use of the walking wheel is achieved or follow-up lifting and storage of the walking wheel are facilitated, the movable plate can be driven to move through work of the lifting screw, storage of the walking wheel is achieved, and meanwhile the walking wheel can be conveniently moved by the lifting screw. When the rotary blade rotates, a second gear is linked to rotate, that is, a push plate also starts to move, the rotary blade body is pushed, the rotary blade body and a hexagonal shaft are in butt joint, and then the rotary blade body and the hexagonal shaft are clamped and fixed through a fixing pin rod, so that switching between the walking wheel and the rotary blade is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of micro-tillage machines, and in particular to a rotary tillage blade switching structure and a micro-tillage machine. Background Art

[0002] The micro-tiller is a very common agricultural machinery. It can be used to operate in orchards, vegetable fields, greenhouses, hilly slopes and small plots (water and dry fields). The internal combustion engine drives the rotating blades, and the weight and design of the blades enable the blades to rotate and till the soil surface. Because the micro-tiller is small in size and light in weight, it is easy to transport and store. It can operate flexibly in complex terrains such as narrow plots, slopes, orchards, etc., solving the problem that large agricultural machinery cannot enter.

[0003] At present, the patent with announcement number CN112514562B discloses a rotary tiller, including a casing and a reducer, a tractor connecting frame is arranged on one side of the top of the casing, the reducer is arranged inside the tractor connecting frame, and a guide assembly is arranged on the side of the lower part of the casing close to the tractor connecting frame; the guide assembly includes two groups of mounting frames, the two groups of mounting frames are respectively hinged on the front and back sides of the casing, and a longitudinally extending fixed plate is hinged at the bottom of the mounting frame, a plurality of downwardly inclined crushing teeth are arranged on the side of the fixing plate away from the casing along its length direction, and a cylinder is hinged on the side of the fixing plate away from the crushing teeth, the other end of the cylinder is rotatably matched with the outer side wall of the casing, a rotating seat is arranged on the mounting frame above the cylinder, an elastic rod is hinged on the rotating seat, and the other end of the elastic rod is hinged on a mounting seat connected to the outer wall of the casing. By arranging an inclined rack-shaped soil-shoveling structure on one side of the forward direction of the rotary tiller, the soil before the tilling operation is pre-lifted upward to the top of the front of the rotary tiller to ensure that the soil scooping direction is opposite to the rotation direction of the rotary tiller. Then, the lifted soil is crushed and refined through the rotating action of the rotary tiller to increase the impact effect between the soil and the plow blade structure, thereby achieving soil fluffing. At the same time, a shock-absorbing component with a spring structure is arranged behind the shovel-shaped crushing teeth to prevent the crushing teeth from being damaged by direct impact, which is highly practical.

[0004] However, the following problems still exist during the use of the above-mentioned micro-tillage machine: during use, the rotary tiller and the walking wheel need to be switched according to different usage scenarios, that is, when the micro-tillage machine is moved to a specified position, the walking wheel needs to be used, and after reaching the position, the walking wheel needs to be removed and replaced with the rotary tiller. The whole process is not only very time-consuming and laborious, but also when used in larger places such as orchards, after rotary tillage, it is necessary to run to the original position of rotary tillage to retrieve the walking wheel, which is very inconvenient. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a rotary tiller blade switching structure and a micro-tillage machine, which can select the use of the rotary tiller blade and the traveling wheel by switching, which is more convenient and quick.

[0006] The present invention provides the following technical solutions: a rotary tiller blade switching structure comprises a micro-tillage machine output shaft, a fixed sleeve is arranged on the outside, a hexagonal shaft is fixedly installed on the micro-tillage machine output shaft, a rotary tiller blade body is slidably arranged on the outside of the fixed sleeve, and the hexagonal shaft is engaged with the inner surface of a positioning plate, and a receiving plate is fixedly installed on the positioning plate, an axis groove and a ball groove are arranged on the receiving plate, a limited ball is slidably arranged in the ball groove, and a first electric telescopic rod is fixedly installed on the limited ball, and the first electric telescopic rod is fixedly installed on the moving The plate is provided with a connecting shaft for rotation on the movable plate, and a positioning pin is provided on the outer surface of the connecting shaft, and the positioning pin is snap-fitted with the receiving plate, a walking wheel is connected to the upper shaft of the connecting shaft, a threaded hole is provided in the middle of the movable plate, and a lifting screw is provided in the threaded hole provided on the movable plate, an electric motor is provided at the upper end of the lifting screw, a positioning magnetic rod is adsorbed and bonded to the outer surface of the rotary tiller body, a third electric telescopic rod is fixedly installed on the movable plate, and an adjustment plate is fixedly installed on the lower end of the third electric telescopic rod, and the adjustment plate, the hexagonal shaft and the positioning plate are bonded to each other.

[0007] Furthermore, a hexagonal groove is provided inside the rotary blade body, and the hexagonal groove inside the rotary blade body is larger than the outer diameter of the hexagonal shaft and the fixed sleeve. Through the above structure, the rotary blade body can move freely outside the fixed sleeve, and the rotary blade body and the hexagonal shaft can be engaged and limited.

[0008] Furthermore, four positioning pins are arranged at equal angles with respect to the center of the connecting shaft, and the connecting shaft is snap-connected with the receiving plate through an axis groove opened on the receiving plate, and the limiting ball is rollingly connected with the receiving plate through the ball groove. Through the above structure, it is convenient to support the receiving plate without affecting the rotation of the receiving plate.

[0009] Furthermore, the movable plate is provided with a cylindrical slide groove that penetrates through, and a guide rod is arranged in the slide groove provided on the movable plate, and a fixed plate is fixedly installed at the lower end of the guide rod, a first bearing is installed in the middle position of the fixed plate, and the fixed plate is rotatably connected with the lifting screw through the first bearing, a support plate is fixedly installed at the upper end of the guide rod, and a second bearing is installed in the middle of the support plate, the lifting screw is rotatably connected with the support plate through the second bearing, and a motor is arranged on the support plate, and a storage box is fixedly installed on the support plate. Through the above structure, it is convenient to limit the moving range of the movable plate through the guide rod to avoid the rotation of the movable plate.

[0010] Furthermore, the movable plate is configured as a "7"-shaped plate structure, and a fixed rack is fixedly installed on the movable plate, and the fixed rack is meshed with the first gear, the first gear is rotatably installed at the lower end of the fixed plate, and a second gear is also installed at the lower end of the fixed plate, the pulley is composed of two wheels connected to the belt, and the two wheels constituting the pulley are coaxially connected to the first gear and the second gear respectively. Through the above structure, it is convenient to drive the second gear to rotate by the rotation of the first gear.

[0011] Furthermore, two limiting sliding rods are symmetrically arranged on the lower surface of the fixed plate, and a limiting plate is arranged on the external sliding of the limiting sliding rod, and a sliding plate is fixedly installed on the lower end of the limiting plate, a gear structure is arranged on the upper end of the sliding plate, and the sliding plate is meshed with the second gear through the gear structure arranged on the upper end. Through the above structure, the sliding plate can be moved with the rotation of the second gear, and the sliding plate can be supported and limited while the sliding plate moves.

[0012] Furthermore, a push plate is rotatably provided on the sliding plate, and a gear set is coaxially installed on the push plate, a second electric telescopic rod is fixedly installed on the side of the sliding plate, and a driving rack is provided on the upper end of the second electric telescopic rod, and the driving rack and the gear set are meshed with each other. Through the above structure, the second electric telescopic rod can drive the driving rack to rotate, thereby causing the push plate to rotate, thereby realizing the use or storage of the push plate.

[0013] Furthermore, three through positioning grooves are provided at equal angles on the hexagonal shaft, and a fixing pin is fitted in the positioning groove provided on the hexagonal shaft, a limiting pin is provided through the fixing pin, and the limiting pin is provided in a "U"-shaped structure, and both sides of the limiting pin pass through the extension plate, a positioning rod is provided through the extension plate, and the positioning rod and the limiting pin fit each other, a positioning spring is fixedly installed on the positioning rod, and the positioning spring is fixedly installed on the side of the extension plate. Through the above structure, it is convenient to stably engage and fix the rotary blade body and the hexagonal shaft.

[0014] The present invention further provides a micro-tillage machine, comprising a micro-tillage machine body, characterized in that the micro-tillage machine body comprises any of the above-mentioned rotary tillage blade switching structures.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The rotary tiller blade switching structure and the micro-tillage machine can realize the engagement or disengagement between the hexagonal shaft and the positioning plate through the movement of the receiving plate, so that the walking wheel can be used or the walking wheel can be lifted and stored later. The moving plate can be driven to move up and down by the operation of the lifting screw to realize the storage of the walking wheel. While the walking wheel is being stored, the second gear is linked to rotate, so that the sliding plate moves, that is, the pushing plate also starts to move, so as to push the rotary tiller blade body, realize the docking between the rotary tiller blade body and the hexagonal shaft, and then the fixing pin rod is used to carry out The locking and fixing can realize the switching between the walking wheel and the rotary tiller, and the stability of the fixing pin can be ensured by the extension plate and the positioning rod to avoid it falling off during use. The adjustment plate is driven to move by the third electric telescopic rod, and the adjustment plate can push the hexagonal shaft and the positioning plate to adjust the position to ensure the subsequent smooth docking between the two. The movement of the rack can drive the gear set and the pushing plate to rotate. As the pushing plate rotates, the pushing plate can be stored to avoid the pushing plate blocking and obstructing the rotary tiller body during the subsequent rotary tillage process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the micro-tillage machine body of the present invention;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the travel wheel of the present invention;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixing plate of the present invention;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the lifting screw rod of the present invention;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the movable plate of the present invention;

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the push plate of the present invention;

[0023] Figure 7 It is a schematic diagram of the three-dimensional cross-sectional structure of the gear set of the present invention;

[0024] Figure 8 It is a schematic diagram of the three-dimensional cross-sectional structure of the fixing sleeve of the present invention;

[0025] Fig. 9 This is a schematic diagram of the exploded three-dimensional structure of the hexagonal shaft of the present invention;

[0026] Fig.10 It is a schematic diagram of the three-dimensional cross-sectional structure of the extension plate of the present invention;

[0027] Fig.11 This is a schematic diagram of the three-dimensional structure of the adjustment plate of the present invention;

[0028] Fig.12 It is a schematic diagram of the three-dimensional cross-sectional structure of the receiving plate of the present invention;

[0029] Fig.13 It is a schematic diagram of the exploded three-dimensional structure of the connecting shaft of the present invention.

[0030] In the figure: 1. micro-tillage machine body; 2. micro-tillage machine output shaft; 3. fixed sleeve; 4. rotary tiller body; 5. hexagonal shaft; 6. positioning plate; 7. receiving plate; 8. limit ball; 9. first electric telescopic rod; 10. moving plate; 11. connecting shaft; 12. positioning pin; 13. walking wheel; 14. guide rod; 15. fixed plate; 16. lifting screw; 17. support plate; 18. motor; 19. storage box; 20. positioning magnetic rod; 21. Fixed rack; 22, first gear; 23, pulley; 24, second gear; 25, limiting slide bar; 26, limit plate; 27, sliding plate; 28, push plate; 29, gear set; 30, second electric telescopic rod; 31, driving rack; 32, third electric telescopic rod; 33, adjustment plate; 34, shaft groove; 35, ball groove; 36, fixed pin rod; 37, limiting pin rod; 38, extension plate; 39, positioning rod; 40, positioning spring. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] See also Figure 1-Figure 13 The present invention provides a technical solution: a rotary tiller blade switching structure, comprising a micro-tillage machine output shaft 2, a fixed sleeve 3 is arranged on the outside, and a hexagonal shaft 5 is fixedly installed on the micro-tillage machine output shaft 2, a rotary tiller blade body 4 is slidably arranged on the outside of the fixed sleeve 3, and the hexagonal shaft 5 is mutually engaged with the inner surface of the positioning plate 6, and a receiving plate 7 is fixedly installed on the positioning plate 6, and an axis groove 34 and a ball groove 35 are opened on the receiving plate 7, a limit ball 8 is slidably arranged in the ball groove 35, and a first electric telescopic rod 9 is fixedly installed on the limit ball 8, and the first electric telescopic rod 9 is fixedly installed on the first electric telescopic rod 9. The rod 9 is fixedly installed on the movable plate 10, and a connecting shaft 11 is rotatably arranged on the movable plate 10, and a positioning pin 12 is arranged on the outer surface of the connecting shaft 11, and the positioning pin 12 is snap-fitted with the receiving plate 7, and a walking wheel 13 is connected to the connecting shaft 11, and four positioning pins 12 are arranged at equal angles about the center of the connecting shaft 11, and the connecting shaft 11 is snap-fitted with the receiving plate 7 through an axis groove 34 opened on the receiving plate 7, and the limiting ball 8 is rollingly connected with the receiving plate 7 through the ball groove 35, and a positioning magnetic rod 20 is adsorbed and attached to the outer surface of the rotary blade body 4.

[0033] The micro-tillage machine body 1 can be moved to a specified position by the walking wheel 13, so that the third electric telescopic rod 32 starts to work. Because the lower end of the third electric telescopic rod 32 is provided with an adjustment plate 33, the adjustment plate 33 starts to push the positioning plate 6 and the receiving plate 7, so that the side positions of the positioning plate 6 and the receiving plate 7 are fitted with the adjustment plate 33 (the corner positions of the non-positioning plate 6 and the receiving plate 7 are fitted), and then the first electric telescopic rod 9 starts to shrink. Because the first electric telescopic rod 9 is fixedly installed with a limiting ball 8, and the limiting ball 8 is rollingly connected with the receiving plate 7 through the ball groove 35, As the first electric telescopic rod 9 contracts, the receiving plate 7 begins to move toward the moving plate 10, because the receiving plate 7 is engaged with the positioning pin 12 arranged outside the connecting shaft 11 through the shaft groove 34. At this time, as the receiving plate 7 moves, the positioning pin 12 begins to slide in the shaft groove 34. Since the positioning plate 6 is fixedly mounted on the receiving plate 7, the positioning plate 6 begins to move away from the hexagonal shaft 5 until it no longer fits with the hexagonal shaft 5. At this time, the limit between the hexagonal shaft 5 and the positioning plate 6 is released, that is, the walking wheel 13 no longer rotates with the rotation of the hexagonal shaft 5.

[0034] A threaded hole is provided in the middle of the movable plate 10, and a lifting screw 16 is arranged in the threaded hole provided on the movable plate 10, and a motor 18 is arranged on the upper end of the lifting screw 16, a hexagonal groove is provided inside the rotary blade body 4, and the hexagonal groove in the rotary blade body 4 is larger than the outer diameter of the hexagonal shaft 5 and the fixed sleeve 3, a cylindrical slide groove is provided on the movable plate 10, and a guide rod 14 is arranged in the slide groove provided on the movable plate 10, and a fixed plate 15 is fixedly installed at the lower end of the guide rod 14, a first bearing is installed in the middle position of the fixed plate 15, and the fixed plate 15 is rotatably connected with the lifting screw 16 through the first bearing, a support plate 17 is fixedly installed on the upper end of the guide rod 14, and a second bearing is installed in the middle of the support plate 17, the lifting screw 16 is rotatably connected with the support plate 17 through the second bearing, and an electric motor 18 is arranged on the support plate 17. The motor 18 is provided, and a storage box 19 is fixedly mounted on the support plate 17. The movable plate 10 is arranged as a "7"-shaped plate-shaped structure, and a fixed rack 21 is fixedly mounted on the movable plate 10, and the fixed rack 21 is meshed with the first gear 22, the first gear 22 is rotatably mounted on the lower end of the fixed plate 15, and a second gear 24 is also mounted on the lower end of the fixed plate 15, the pulley 23 is composed of two rotating wheels connected with a belt, and the two rotating wheels constituting the pulley 23 are coaxially connected with the first gear 22 and the second gear 24 respectively, two limiting slide bars 25 are symmetrically arranged on the lower surface of the fixed plate 15, and a limiting plate 26 is provided for sliding outside the limiting slide bar 25, and a sliding plate 27 is fixedly mounted on the lower end of the limiting plate 26, a gear structure is provided on the upper end of the sliding plate 27, and the sliding plate 27 is meshed with the second gear 24 through the gear structure provided on the upper end.

[0035] As the hexagonal shaft 5 and the positioning plate 6 are disengaged, the motor 18 starts to work. Because the output end of the motor 18 is connected to the lifting screw 16, the lifting screw 16 starts to rotate. Because the lifting screw 16 is connected to the moving plate 10 through the threaded hole on the moving plate 10, as the lifting screw 16 rotates, the moving plate 10 starts to move under the limiting action of the guide rod 14, that is, the moving plate 10 starts to move upward, thereby driving the walking wheel 13 to move and be stored, so as to prevent the walking wheel 13 from affecting the subsequent rotary tillage process. Because the fixed rack 21 is fixedly installed on the moving plate 10, and the fixed rack 21 is connected to the first gear 22, the first gear 22 starts to rotate. Because the first gear 22 is coaxially connected to the pulley 23, and the pulley 23 is coaxially connected to the second gear 24, the second gear 24 starts to rotate. Because the second gear 24 is meshed with the sliding plate 27, under the action of the limiting slide bar 25 and the limiting plate 26, the sliding plate 10 The movable plate 27 begins to move, because a pushing plate 28 is provided at the lower end of the sliding plate 27. At this time, the pushing plate 28 begins to move, because the pushing plate 28 is in contact with the blade provided on the rotary blade body 4, the blade can be pushed to move, that is, the rotary blade body 4 is pushed to move (the blade material on the rotary blade body 4 is set to be an iron material that can be adsorbed by a magnet. In the process of retracting the rotary blade body 4, the blade provided on the rotary blade body 4 begins to be adsorbed by the positioning magnetic rod 20, because the micro-tiller output shaft 2 and the micro-tiller body 1 are connected to each other by a resistance shaft, that is, the micro-tiller output shaft 2 will not rotate during the pushing process, that is, the hexagonal shaft 5 will not rotate, so that the rotary blade body 4 can be rotated to adjust the position, so that the blade is in contact with the positioning magnetic rod 20, which is convenient for direct docking during subsequent movement). At this time, the square groove opened inside the rotary blade body 4 begins to fit with the outside of the hexagonal shaft 5, so that the rotary blade body 4 can be driven to rotate by the rotation of the hexagonal shaft 5. It should be noted that the push plate 28 is a circular arch plate, and the number of blades on the rotary blade body 4 is evenly distributed is more than 4, so as to ensure that the movement of the push plate 28 can drive the movement of the rotary blade body 4.

[0036] A third electric telescopic rod 32 is fixedly installed on the moving plate 10, and an adjustment plate 33 is fixedly installed at the lower end of the third electric telescopic rod 32, and the adjustment plate 33 is in contact with the hexagonal shaft 5 and the positioning plate 6. A push plate 28 is rotatably provided on the sliding plate 27, and a gear set 29 is coaxially installed on the push plate 28. A second electric telescopic rod 30 is fixedly installed on the side of the sliding plate 27, and a driving rack 31 is provided on the upper end of the second electric telescopic rod 30, and the driving rack 31 is meshed with the gear set 29. The hexagonal shaft 5 is equiangular. Three through positioning grooves are provided, and a fixing pin 36 is fitted in the positioning groove provided on the hexagonal shaft 5, a limiting pin 37 is provided through the fixing pin 36, and the limiting pin 37 is provided in a "U"-shaped structure, and both sides of the limiting pin 37 pass through the extension plate 38, a positioning rod 39 is provided through the extension plate 38, and the positioning rod 39 and the limiting pin 37 fit each other, a positioning spring 40 is fixedly installed on the positioning rod 39, and the positioning spring 40 is fixedly installed on the side position of the extension plate 38.

[0037] As the tiller body 4 and the hexagonal shaft 5 fit together, the fixing pin 36 and the limiting pin 37 are taken out from the storage box 19 (the figure shows the installation position, which is directly drawn on the hexagonal shaft 5, but in actual use, it is only used when the hexagonal shaft 5 and the tiller body 4 are connected). As the tiller body 4 moves to the outside of the hexagonal shaft 5, the fixing pin 36 is passed through the tiller body 4 and the hexagonal shaft 5 in turn, and then the positioning rod 39 is pulled to make the positioning rod 39 start to move away from the extension plate 38. Because the positioning spring 40 is fixedly installed on the positioning rod 39, the positioning spring 40 begins to be stretched and deformed at this time, and then the extension plate 38 and the limiting pin 37 fit together, and the positioning rod 39 is released. Under the action of the positioning spring 40 restoring the deformation, the positioning rod 39 begins to engage with the limiting pin 37, thereby achieving stable fixation between the rotary blade body 4 and the hexagonal shaft 5, and then the second electric telescopic rod 30 starts to work. Because the second electric telescopic rod 30 is fixedly installed with a driving rack 31, the driving rack 31 begins to move upward at this time. Because the driving rack 31 is engaged with the gear set 29, the gear set 29 begins to rotate at this time. Because the gear set 29 is coaxially connected with the push plate 28, the push plate 28 begins to rotate in the direction close to the sliding plate 27, so that the push plate 28 can be folded and stored, avoiding the push plate 28 affecting the rotation of the rotary blade body 4.

[0038] When use is completed, the positioning rod 39 is pulled to remove the extension plate 38 from the limiting pin 37, and then the limiting pin 37 and the fixing pin 36 are removed, and the fixing pin 36, the limiting pin 37 and the extension plate 38 are placed in the storage box 19, and then the third electric telescopic rod 32 drives the rack 31 to move downward, that is, the push plate 28 starts to rotate in the direction away from the sliding plate 27, that is, the push plate 28 starts to fit with the rotary blade body 4, so that the lifting screw 16 drives the moving plate 10 to move downward, and the sliding plate 27 drives the push plate 28 to push the rotary blade body 4 to move in the direction close to the micro-tillage machine body 1, and at the same time, the third electric The movable telescopic rod 32 starts to work, and the third electric telescopic rod 32 starts to drive the adjustment plate 33 to adjust the position of the hexagonal shaft 5. As the pushing plate 28 moves, the rotary blade body 4 is pushed to the outside of the fixed sleeve 3. At this time, the rotary blade body 4 begins to adsorb with the positioning magnetic rod 20, and then the first electric telescopic rod 9 starts to work, thereby driving the receiving plate 7 to move away from the movable plate 10 until the positioning plate 6 is engaged with the hexagonal shaft 5 again. At this time, the rotary blade body 4 can be stored and the walking wheel 13 can be used to switch the rotary blade. At this time, there is no need to return to the original position to take the walking wheel 13, which is more convenient and quick.

[0039] A micro-tillage machine comprises a micro-tillage machine body 1, wherein the micro-tillage machine body 1 comprises any one of the above-mentioned rotary tillage blade switching structures.

[0040] A micro-tiller output shaft 2 is installed at the lower end of the micro-tiller body 1 through a resistance shaft, and the micro-tiller output shaft 2 can be driven to rotate through the internal structure of the micro-tiller body 1, and the driving method is consistent with the driving method of the existing micro-tiller, and fixing plates 15 are fixedly installed on both sides of the micro-tiller body 1 by screws, and a support plate 17 is provided on the upper end of the fixing plate 15, and the support plate 17 is fixedly installed on the micro-tiller body 1.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary tiller blade switching structure, comprising a micro-tiller output shaft (2), an externally provided fixed sleeve (3), and a hexagonal shaft (5) fixedly mounted on the micro-tiller output shaft (2), characterized in that: Also includes: A rotary tiller body (4) is slidably provided on the outside of the fixed sleeve (3), and the hexagonal shaft (5) is engaged with the inner surface of the positioning plate (6), and a receiving plate (7) is fixedly installed on the positioning plate (6), and an axis groove (34) and a ball groove (35) are provided on the receiving plate (7), and a limiting ball (8) is slidably provided in the ball groove (35), and a first electric telescopic rod (9) is fixedly installed on the limiting ball (8), and the first electric telescopic rod (9) is fixedly installed on the moving plate (10), and a connecting shaft (11) is rotatably provided on the moving plate (10), and a positioning pin (12) is provided on the outer surface of the connecting shaft (11), and The positioning pin (12) is connected to the receiving plate (7) in a snap-fitting manner. The upper shaft of the connecting shaft (11) is connected to a walking wheel (13). A threaded hole is provided in the middle of the movable plate (10). A lifting screw (16) is provided in the threaded hole provided on the movable plate (10). An electric motor (18) is provided at the upper end of the lifting screw (16). A positioning magnetic rod (20) is adsorbed and attached to the outer surface of the rotary tiller body (4). A third electric telescopic rod (32) is fixedly installed on the movable plate (10). An adjustment plate (33) is fixedly installed at the lower end of the third electric telescopic rod (32). The adjustment plate (33) is attached to the hexagonal shaft (5) and the positioning plate (6).

2. The rotary tiller blade switching structure according to claim 1, characterized in that: A penetrating hexagonal groove is provided inside the rotary blade body (4), and the hexagonal groove inside the rotary blade body (4) is larger than the outer diameters of the hexagonal shaft (5) and the fixed sleeve (3).

3. A rotary tiller blade switching structure according to claim 1 or 2, characterized in that: Four positioning pins (12) are arranged at equal angles with respect to the center of the connecting shaft (11), and the connecting shaft (11) is connected to the receiving plate (7) in a snap-fit ​​manner through a shaft groove (34) provided on the receiving plate (7), and the limiting ball (8) is connected to the receiving plate (7) in a rolling manner through the ball groove (35).

4. A rotary tiller blade switching structure according to claim 1 or 2, characterized in that: The movable plate (10) is provided with a cylindrical sliding groove, and a guide rod (14) is provided in the sliding groove provided on the movable plate (10), and a fixed plate (15) is fixedly installed at the lower end of the guide rod (14), a first bearing is installed in the middle of the fixed plate (15), and the fixed plate (15) is rotatably connected to the lifting screw (16) through the first bearing, a support plate (17) is fixedly installed at the upper end of the guide rod (14), and a second bearing is installed in the middle of the support plate (17), and the lifting screw (16) is rotatably connected to the support plate (17) through the second bearing, and a motor (18) is provided on the support plate (17), and a storage box (19) is fixedly installed on the support plate (17).

5. The rotary tiller blade switching structure according to claim 4, characterized in that: The movable plate (10) is configured as a "7"-shaped plate structure, and a fixed rack (21) is fixedly mounted on the movable plate (10), and the fixed rack (21) and the first gear (22) are meshed with each other, the first gear (22) is rotatably mounted on the lower end of the fixed plate (15), and the lower end of the fixed plate (15) is also mounted with a second gear (24), the pulley (23) is composed of two rotating wheels connected to a belt, and the two rotating wheels constituting the pulley (23) are coaxially connected to the first gear (22) and the second gear (24), respectively.

6. The rotary tiller blade switching structure according to claim 5, characterized in that: Two limiting slide bars (25) are symmetrically arranged on the lower surface of the fixed plate (15), and a limiting plate (26) is slidably arranged outside the limiting slide bar (25), and a sliding plate (27) is fixedly installed on the lower end of the limiting plate (26), and a gear structure is arranged on the upper end of the sliding plate (27), and the sliding plate (27) is meshed with the second gear (24) through the gear structure arranged on the upper end.

7. The rotary tiller blade switching structure according to claim 6, characterized in that: A push plate (28) is rotatably provided on the sliding plate (27), and a gear set (29) is coaxially installed on the push plate (28). A second electric telescopic rod (30) is fixedly installed on the side of the sliding plate (27), and a driving rack (31) is provided on the upper end of the second electric telescopic rod (30), and the driving rack (31) and the gear set (29) are meshed with each other.

8. A rotary tiller blade switching structure according to claim 1, 2, 5, 6 or 7, characterized in that: The hexagonal shaft (5) is provided with three through positioning grooves at equal angles, and a fixing pin (36) is fitted in the positioning grooves provided on the hexagonal shaft (5), a limiting pin (37) is provided through the fixing pin (36), and the limiting pin (37) is provided in a "U"-shaped structure, and both sides of the limiting pin (37) pass through the extension plate (38), a positioning rod (39) is provided through the extension plate (38), and the positioning rod (39) and the limiting pin (37) fit each other, a positioning spring (40) is fixedly installed on the positioning rod (39), and the positioning spring (40) is fixedly installed on the side of the extension plate (38).

9. A micro-tillage machine, comprising a micro-tillage machine body (1), characterized in that: The micro-tillage machine body (1) comprises the rotary blade switching structure according to any one of the above claims.

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