A rotary weeding device

Abstract

The application discloses a rotary weeding device, which comprises a hub, a pair of hubs are connected through a shaft coaxial with the hubs; a weeding knife, and a plurality of weeding knives are arranged at intervals on the side of the pair of hubs, and a plurality of triangular auxiliary teeth distributed on the same line are formed on the blade of the weeding knife through a plurality of continuous triangular grooves arranged on the blade; a fixedly arranged hanging type mounting bracket is rotatably connected to the two ends of the shaft, the two side hanging type mounting brackets are connected through a cross beam, and the scraper is reciprocatingly arranged on the cross beam through a scraper driving mechanism. The auxiliary teeth arranged on the blade of the weeding knife improve the ability of the weeding knife to break soil and cut weeds, the soil breaking and loosening effect of the auxiliary teeth is beneficial to the falling of the soil and the weeds carried by the soil from the weeding knife, and the scraper is combined with the weeding knife, so that the rotary weeding device can reasonably select a weeding mode according to the working condition, and the rotary weeding device can maintain the normal soil breaking and weeding function of the weeding knife under different working conditions.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a rotary weeding device. Background Technology

[0002] In modern farming operations, mini-tillers are commonly used for weeding. The key weeding component of these mini-tillers is the weeding blade, which applies torque to till and remove soil and weeds. While traditional weeding machines can meet the weeding requirements, the blades are prone to problems such as tangling with weeds, dulling, and soil adhesion during operation.

[0003] Although optimizing the blade and installation angle of the weeding knife can improve the above problems, it is still difficult to completely solve them. Especially when the soil moisture is high and there are many small mounds in the soil, the soil attached to the weeding knife is difficult to fall off in time. As a result, the soil and weeds attached to the weeding knife will gradually accumulate, which not only affects the weeding effect of the weeding knife, but also increases the resistance of the weeding knife to removing soil, thus increasing the power consumption of the weeding device. Summary of the Invention

[0004] The purpose of this invention is to provide a rotary weeding device to solve the technical problem in the prior art where the weeding effect of the weeding device is reduced because it is difficult to clean the soil and weeds attached to the weeding blade.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0006] A rotary weeding device, comprising:

[0007] A pair of hubs are provided, and the pair of hubs are connected by axles coaxial with them;

[0008] A weeding blade is provided on the side of the pair of wheel hubs, and multiple weeding blades are provided at equal intervals. The blade of the weeding blade is provided with multiple triangular grooves to form multiple triangular auxiliary teeth distributed on the same straight line.

[0009] A scraper, spaced apart from the weeding blade, is used to scrape away soil and weeds carried by the outside of the weeding blade as it passes through a scraping position aligned with it.

[0010] The two ends of the axle are rotatably connected to fixed hanging brackets, and the two sides of the hanging brackets are connected by a crossbeam. The crossbeam is spaced apart from the weeding blade and the wheel hub. The scraper is reciprocally slidably mounted on the crossbeam by a scraper drive mechanism.

[0011] As a preferred embodiment of the present invention, the auxiliary tooth is inclined in a manner that is laterally twisted at the root.

[0012] As a preferred embodiment of the present invention, the weeding knife has a front side of the blade located in front of the rotation direction of the weeding knife, and the front side of the weeding knife is inclined to the outside away from the wheel axle.

[0013] In a preferred embodiment of the present invention, the crossbeam is mounted on the suspended mounting bracket via a scraper following mechanism. The crossbeam is driven by the scraper following mechanism to reciprocate around the axle, so that the scraper can move synchronously around the axle with the weeding blade during the scraping action, and the crossbeam is reset after the scraper completes the scraping action.

[0014] As a preferred embodiment of the present invention, the scraper following mechanism includes a positioning ring, a swing arm, a swing arm driving assembly and a swing arm resetting assembly, wherein the positioning ring is rotatably sleeved at both ends of the wheel axle, and both ends of the crossbeam are supported on the corresponding positioning ring by the swing arm;

[0015] The swing arm drive assembly is mounted on the suspended mounting bracket and connected to the swing arm. The swing arm drive assembly drives the crossbeam to swing around the wheel axle through the swing arm, so that the scraper moves synchronously with the weeding blade during the scraping action.

[0016] The swing arm reset assembly is mounted on the suspended mounting bracket and connected to the swing arm. The swing arm reset assembly drives the crossbeam through the swing arm so that the crossbeam resets after the scraper completes the scraping action.

[0017] As a preferred embodiment of the present invention, an arc-shaped guide plate is provided on the side of the swing arm near the hanging mounting bracket, the center of the circle containing the arc-shaped guide plate is located on the axis of the wheel axle, and an arc-shaped guide groove is provided on the side of the hanging mounting bracket, with the arc-shaped guide plate slidingly engaging with the arc-shaped guide groove.

[0018] In a preferred embodiment of the present invention, the scraper includes a blade head, a blade holder, a blade head return spring, and a pull electromagnet. The blade holder is fixedly mounted on the scraper drive mechanism. The blade head is located at the bottom of the blade holder facing the weeding blade, and a blade groove is provided at the bottom of the blade holder. One end of the blade head is rotatably mounted in the blade groove via a positioning shaft, and the other end of the blade head is connected to the blade head return spring fixedly mounted in the blade groove. The pull electromagnet is located in the blade groove and away from the positioning shaft.

[0019] The electromagnet is used to pull the other end of the blade head into the blade groove during the process of the crossbeam returning to its initial position, so that the scraper avoids the weeding blade behind it.

[0020] As a preferred embodiment of the present invention, the swing arm drive assembly includes a linkage ring, an annular shell, a photoelectric sensor, a transmission pin, a push-pull electromagnet, and a controller. The linkage ring is coaxial and fixedly sleeved on the wheel axle. The annular shell is fixedly disposed on the outside of the positioning ring and is disposed opposite to the linkage ring.

[0021] The linkage ring is provided with a plurality of linkage slots that are circumferentially and equally spaced on the outer side of the annular shell, and the transmission pin is provided on the inner side of the annular shell through the push-pull electromagnet.

[0022] Both the photoelectric sensor and the controller are mounted on the annular shell, and both the photoelectric sensor and the push-pull electromagnet are electrically connected to the controller.

[0023] The controller detects the rotation angle of the linkage ring through the photoelectric sensor, and inserts the locking pin into the linkage slot through the push-pull electromagnet to realize the axle driving the positioning ring.

[0024] As a preferred embodiment of the present invention, the swing arm reset assembly is a swing arm reset tension spring with one end fixedly mounted on the hanging mounting bracket and the other end connected to the swing arm.

[0025] As a preferred embodiment of the present invention, the scraper driving mechanism is a rodless cylinder, which is embedded in the bottom of the crossbeam facing the wheel axle.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] This invention improves the ability of a weeding blade to break up soil and cut weeds by adding auxiliary teeth to its blade, thereby reducing the power consumption of the rotary weeding device and increasing its efficiency. The auxiliary teeth also help to break up and loosen the soil, allowing soil and weeds to fall off the blade. Combined with the scraper's function of actively scraping away soil and weeds attached to the outside of the blade, the rotary weeding device can rationally select the weeding mode according to the working conditions, ensuring that the blade can maintain normal soil breaking and weeding functions under different working conditions. Attached Figure Description

[0028] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0029] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the scraper structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the swing arm drive assembly of the present invention;

[0032] Figure 4 This is a schematic diagram of the arc-shaped guide groove of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the weeding knife of the present invention.

[0034] The labels in the diagram represent the following:

[0035] 1-Hub; 2-Axle; 3-Weeding blade; 4-Auxiliary tooth; 5-Scraper; 6-Hanging mounting bracket; 7-Crossbeam; 8-Scraper drive mechanism; 9-Scraper following mechanism; 10-Arc-shaped guide plate; 11-Arc-shaped guide groove; 12-Blade groove; 13-Linkage slot;

[0036] 501 - Cutting head; 502 - Cutting head holder; 503 - Cutting head return spring; 504 - Pull-pull electromagnet;

[0037] 901 - Positioning ring; 902 - Swing arm; 903 - Swing arm drive assembly; 904 - Swing arm reset assembly;

[0038] 9031-Linkage ring; 9032-Annular shell; 9033-Photoelectric sensor; 9034-Transmission pin; 9035-Push-pull electromagnet; 9036-Controller. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figures 1 to 5 As shown, the present invention provides a rotary weeding device, comprising:

[0041] A hub 1, which is provided in pairs, and the pair of hubs 1 are connected by a wheel axle 2 coaxial with it;

[0042] Weeding blade 3 is set on the side of a pair of wheel hubs 1, and multiple weeding blades 3 are evenly spaced. Multiple triangular auxiliary teeth 4 are formed on the blade of the weeding blade 3 by setting multiple continuous triangular grooves and distributed on the same straight line.

[0043] The scraper 5 is spaced apart from the weeding blade 3 and is used to scrape away the soil and weeds carried on the outside of the weeding blade 3 as it passes the scraping position aligned with it.

[0044] The two ends of the axle 2 are rotatably connected to fixed hanging brackets 6. The tops of the hanging brackets 6 on both sides are connected by crossbeams 7. The crossbeams 7 are spaced apart from the weeding blades 3 and the hub 1. The scraper 5 is reciprocally slidably mounted on the crossbeams 7 through the scraper drive mechanism 8.

[0045] When the soil is relatively dry and there are few mounds, the auxiliary teeth 4 have a similar function of loosening the soil as a rake. The soil carried by the weeding blade 3 becomes looser and more porous after being divided by multiple auxiliary teeth 4, which makes it easier for the soil on the weeding blade 3 to fall off as the weeding blade 3 is turned over.

[0046] When soil moisture is high and there are many raised mounds, making it difficult for soil adhering to the weeding blade 3 to fall off promptly as the blade 3 rotates, the scraper drive mechanism 8 reciprocates to drive the scraper 5. For example, if the scraper 5 is located directly above the axle 2, when the weeding blade 3 reaches the highest point of its circular path, the outer surface of the weeding blade 3 engages with the scraper 5. At this time, the soil and weeds adhering to the outer surface of the weeding blade 3 are quickly scraped off by the scraper 5 at the other end, reducing the resistance to driving the weeding blade 3 and maintaining its normal cutting ability, thereby reducing energy consumption and improving efficiency. Furthermore, the mechanism can rationally select whether the scraper 5 needs to intervene based on the working conditions to meet the actual needs of use.

[0047] In addition, the scraper 5 is set at an angle so that the soil and weeds scraped off by the scraper 5 can fall from the front and back of the weeding blade 3.

[0048] This invention improves the ability of the weeding blade 3 to break soil and cut weeds by setting auxiliary teeth 4 on the blade, thereby reducing the power consumption of the rotary weeding device and improving its efficiency. The auxiliary teeth 4 also help to break and loosen the soil, allowing the soil and weeds attached to it to fall off the weeding blade 3. Combined with the scraper 5's active function of cleaning the soil and weeds attached to the outside of the weeding blade 3, the rotary weeding device can rationally select the weeding mode according to the working conditions, so that the rotary weeding device can maintain the normal soil breaking and weeding functions of the weeding blade 3 under different working conditions.

[0049] In order to extend the service life of the auxiliary tooth 4, the auxiliary tooth 4 is tilted in a way that the root is twisted laterally. So when the weeding knife 3 rotates and comes into contact with the soil and weeds, the force on the auxiliary tooth 4 is decomposed into two components in two directions by tilting, avoiding the disadvantage that the auxiliary tooth 4 is easily bent due to direct force in its thickness direction.

[0050] Furthermore, the inclined setting of the auxiliary teeth 4 improves the cutting ability of its two sides against weeds and soil, which not only helps to reduce the resistance of the weeding blade 3 to soil removal, thereby extending the service life of the weeding blade 3 and reducing energy consumption, but also improves the cutting ability of the weeding blade 3 against weeds, thereby enhancing the weeding effect and efficiency of the rotary weeding device (hereinafter referred to as the weeding blade wheel).

[0051] The weeding knife 3 has a blade with its front side located in front of the direction of rotation of the weeding knife 3, and the front side of the weeding knife 3 is inclined to the outside away from the wheel axle 2. That is, the blade of the front side of the weeding knife 3 is inclined to the outside, which helps to avoid the back of the weeding knife 3 from contacting soil, weeds and other debris, thus affecting the resistance, stability and service life of the weeding knife 3, and is also beneficial to cutting weeds.

[0052] Accordingly, in order for the scraper 5 to fully scrape away the soil and weeds on the outer surface of the weeding blade 3, the bottom of the scraper 5 is parallel to the outer surface of the weeding blade 3 that is rotated between the scraper 5 and the axle 2.

[0053] To ensure that the scraper 5 maintains a consistent gap with the outer side of the weeding blade 3 during the scraping action, thus guaranteeing the scraping effect of the scraper 5 on the surface of the weeding blade 3, the crossbeam 7 is mounted on the hanging bracket 6 via the scraper following mechanism 9. The crossbeam 7 is driven by the scraper following mechanism 9 to swing back and forth around the wheel axle 2, so that the scraper 5 can move synchronously around the wheel axle 2 with the weeding blade 3 during the scraping action, and the crossbeam 7 returns to its original position after the scraper 5 completes the scraping action.

[0054] The scraper following mechanism 9 includes a positioning ring 901, a swing arm 902, a swing arm drive assembly 903 and a swing arm reset assembly 904. Both ends of the wheel axle 2 are rotatably fitted with positioning rings 901, and both ends of the crossbeam 7 are supported on the corresponding positioning rings 901 by the swing arms 902.

[0055] The swing arm drive assembly 903 is mounted on the hanging bracket 6 and connected to the swing arm 902. The swing arm drive assembly 903 drives the crossbeam 7 to swing around the wheel axle 2 through the swing arm 902, so that the scraper 5 moves synchronously with the weeding blade 3 during the scraping action.

[0056] The swing arm reset assembly 904 is mounted on the hanging bracket 6 and connected to the swing arm 902. The swing arm reset assembly 904 drives the crossbeam 7 through the swing arm 902 so that the crossbeam 7 is reset after the scraper 5 completes the scraping action.

[0057] However, if the distance between the scraper 5 and the outer side of the weeding blade 3 is small when the scraper 5 is performing the scraping action, the weeding blade 3 tilted outwards from the front will cause the scraper 5 to collide with the weeding blade 3 behind it during the process of returning to the initial position.

[0058] Therefore, the scraper 5 includes a blade head 501, a blade holder 502, a blade head return spring 503, and a pull electromagnet 504. The blade holder 502 is fixedly mounted on the scraper drive mechanism 8. The blade head 501 is located at the bottom of the blade holder 502 facing the weeding blade 3, and a blade groove 12 is provided at the bottom of the blade holder 502. One end of the blade head 501 is rotatably mounted in the blade groove 12 through a positioning shaft, and the other end of the blade head 501 is connected to the blade head return spring 503 fixedly mounted in the blade groove 12. The pull electromagnet 504 is mounted in the blade groove 12 and away from the positioning shaft.

[0059] The electromagnet 504 is used to pull the other end of the blade 501 into the blade groove 12 during the process of the crossbeam 7 returning to the initial position, so that the scraper 5 avoids the weeding blade 3 behind it. This allows the scraper 5 to maintain a small distance from the outer side of the weeding blade 3 to complete the scraping action, while avoiding the scraper 5 from colliding with the weeding blade 3 behind it during the process of the crossbeam 7 returning to the initial position.

[0060] In addition, an arc-shaped guide plate 10 is provided on the side of the swing arm 902 near the hanging mounting bracket 6. The center of the circle of the arc-shaped guide plate 10 is located on the axis of the wheel axle 2. An arc-shaped guide groove 11 is provided on the side of the hanging mounting bracket 6. The arc-shaped guide plate 10 and the arc-shaped guide groove 11 slide together to increase the stability of the reciprocating swing of the crossbeam 7.

[0061] Since the scraper 5 does not need to continuously scrape the weeding blade 3, and the weeding blade wheel usually rotates at a high speed, if the scraper were to continuously scrape adjacent weeding blades 3 in sequence, the crossbeam 7 would need to swing continuously at a high frequency. This would not only increase the fatigue and mechanical failure of the drive scraper following mechanism 9, but also greatly increase the requirements for the durability, stability and precision of the scraper following mechanism 9. Otherwise, it would negatively affect the stability of the scraper 5 on the crossbeam 7, and even cause the scraper 5 to collide with the weeding blade 3.

[0062] Therefore, the swing arm drive assembly 903 includes a linkage ring 9031, an annular shell 9032, a photoelectric sensor 9033, a transmission pin 9034, a push-pull electromagnet 9035, and a controller 9036. The linkage ring 9031 is coaxial and fixedly sleeved on the wheel axle 2. The annular shell 9032 is fixedly disposed on the outside of the positioning ring 901. The annular shell 9032 is disposed opposite to the linkage ring 9031.

[0063] The linkage ring 9031 is provided with multiple linkage slots 13 that are circumferentially and equally spaced on the outer side of the annular shell 9032, and the transmission pin 9034 is provided on the inner side of the annular shell 9032 through a push-pull electromagnet 9035.

[0064] Both the photoelectric sensor 9033 and the controller 9036 are mounted on the annular shell 9032, and both the photoelectric sensor 9033 and the push-pull electromagnet 9035 are electrically connected to the controller 9036.

[0065] The controller 9036 detects the rotation angle of the linkage ring 9031 through the photoelectric sensor 9033, and inserts the locking pin into the linkage slot 13 through the push-pull electromagnet 9035 to realize the drive of the wheel axle 2 to the positioning ring 901.

[0066] For example, the number of linkage slots 13 corresponds to six for each of the six weeding blades 3. When the controller 9036 controls the push-pull electromagnet 9035 to insert the transmission pin 9034 into the linkage slot 13, the linkage ring 9031 drives the annular shell 9032 to rotate, thereby causing the annular shell 9032 to rotate through the swing arm 902, causing the crossbeam 7 to rotate with the first weeding blade 3. When the photoelectric sensor 9033 detects that the six linkage slots 13 have passed again, the controller 9036 controls the push-pull electromagnet 9035 to drive the transmission pin 9034 out of the linkage slot 13, so that the swing arm reset assembly 904 drives the swing arm 902 to reset the crossbeam 7. Thus, when the photoelectric sensor 9033 detects that the seventh linkage slot 13 has passed, the controller 9036 controls the push-pull electromagnet 9035 to drive the sensing pin to insert into the seventh linkage slot 13. At this point, the weeding blade wheel has rotated one revolution, and the scraper 5 is aligned with the second weeding blade 3 behind the first weeding blade 3, and rotates with the second weeding blade 3.

[0067] In this mode, the scraper 5 will rotate one, two, or more times before scraping the second scraper 3 behind the first scraper 3. This not only ensures that each scraper 3 can have its outer surface soil and weeds scraped away by the scraper 5, but also significantly reduces the load on the scraper following mechanism 9 and the scraper driving mechanism 8. This reduces the manufacturing requirements for the mechanical strength, fatigue resistance, and repeatability of the scraper following mechanism 9 and the scraper driving mechanism 8, thus extending their service life and solving the problem of significantly increased energy consumption caused by the high-frequency operation of the oscillating mechanism and the scraper driving mechanism 8. More importantly, it facilitates the stable operation of the scraper 5 and reduces the risk of collision between the scraper 5 and the scraper 3 due to unstable operation.

[0068] Furthermore, the scraper following mechanism 9 is driven by the wheel axle 2, which enables it to maintain precise coordination with multiple weeding blades 3, thereby improving the overall reliability and accuracy of the weeding blade wheel.

[0069] The scraper following mechanism 9 can be optimized in the way described above to reduce the working frequency, while ensuring that the weeding blade 3 can work normally and efficiently. This is because the weeding blade 3 with auxiliary teeth 4 has the advantage of being conducive to the removal of soil and weeds, and the scraper drive mechanism 8 also benefits from this.

[0070] Among them, the scraper drive mechanism 8 is a rodless cylinder, which is embedded in the bottom of the crossbeam 7 facing the wheel axle 2.

[0071] Among them, the swing arm reset assembly 904 is a swing arm reset tension spring with one end fixed on the hanging mounting bracket 6 and the other end connected to the swing arm 902.

[0072] Since the optimization of the scraper drive mechanism (8) and the reset assembly embodiment brings little benefit to the soil removal and weed removal functions of the weeding blade (3), the above-described embodiments of the scraper drive mechanism (8) and the swing arm reset assembly (904) are for reference only.

[0073] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A rotary weeding device, characterized in that, include: Hub (1), a pair of hubs (1) are connected by axle (2) coaxial with them; Weeding blade (3) is provided on the side of the pair of wheel hubs (1), and multiple weeding blades (3) are provided at equal intervals. Multiple triangular grooves are provided on the blade of the weeding blade (3) to form multiple triangular auxiliary teeth (4) distributed on the same straight line. A scraper (5) is provided at a distance from the weeding knife (3), the scraper (5) being used to scrape away soil and weeds carried on the outside of the weeding knife (3) which is aligned with it at the scraping position; The two ends of the axle (2) are rotatably connected to fixed hanging brackets (6), and the two sides of the hanging brackets (6) are connected by a crossbeam (7). The crossbeam (7) is spaced apart from the weeding blade (3) and the hub (1). The scraper (5) is reciprocally slidably mounted on the crossbeam (7) by the scraper drive mechanism (8). The crossbeam (7) is mounted on the hanging bracket (6) via a scraper following mechanism (9). The crossbeam (7) is driven by the scraper following mechanism (9) to swing back and forth around the wheel axle (2) so that the scraper (5) can move synchronously around the wheel axle (2) with the weeding blade (3) when performing the scraping action, and so that the crossbeam (7) is reset after the scraper (5) has completed the scraping action. The scraper following mechanism (9) includes a positioning ring (901), a swing arm (902), a swing arm drive assembly (903), and a swing arm reset assembly (904). The positioning ring (901) is rotatably sleeved on both ends of the wheel axle (2), and both ends of the crossbeam (7) are supported on the corresponding positioning ring (901) by the swing arm (902). The swing arm drive assembly (903) is mounted on the hanging bracket (6) and connected to the swing arm (902). The swing arm drive assembly (903) drives the crossbeam (7) to swing around the wheel axle (2) through the swing arm (902) so that the scraper (5) moves synchronously with the weeding blade (3) during the scraping action. The swing arm reset assembly (904) is mounted on the hanging bracket (6) and connected to the swing arm (902). The swing arm reset assembly (904) drives the crossbeam (7) through the swing arm (902) so that the crossbeam (7) is reset after the scraper (5) completes the scraping action.

2. The rotary weeding device according to claim 1, characterized in that, The auxiliary tooth (4) is inclined in a lateral twisting manner at the root.

3. The rotary weeding device according to claim 1, characterized in that, The weeding knife (3) has a blade front side located in front of the rotation direction of the weeding knife (3), and the front side of the weeding knife (3) is inclined to the outside away from the wheel axle (2).

4. A rotary weeding device according to claim 1, characterized in that, An arc-shaped guide plate (10) is provided on the side of the swing arm (902) near the hanging mounting bracket (6). The center of the circle containing the arc-shaped guide plate (10) is located on the axis of the wheel axle (2). An arc-shaped guide groove (11) is provided on the side of the hanging mounting bracket (6). The arc-shaped guide plate (10) and the arc-shaped guide groove (11) are in sliding cooperation.

5. A rotary weeding device according to claim 1, characterized in that, The scraper (5) includes a blade head (501), a blade holder (502), a blade head return spring (503), and a pull electromagnet (504). The blade holder (502) is fixedly mounted on the scraper drive mechanism (8). The blade head (501) is located at the bottom of the blade holder (502) facing the weeding blade (3), and a blade groove (12) is provided at the bottom of the blade holder (502). One end of the blade head (501) is rotatably mounted in the blade groove (12) through a positioning shaft. The other end of the blade head (501) is connected to the blade head return spring (503) fixedly mounted in the blade groove (12). The pull electromagnet (504) is located in the blade groove (12) and away from the positioning shaft. The electromagnet (504) is used to pull the other end of the blade (501) into the blade groove (12) during the process of the crossbeam (7) being reset to the initial position, so that the scraper (5) avoids the weeding blade (3) behind it.

6. A rotary weeding device according to claim 1, characterized in that, The swing arm reset assembly (904) is a swing arm reset tension spring with one end fixed on the hanging mounting bracket (6) and the other end connected to the swing arm (902).

7. A rotary weeding device according to claim 1, characterized in that, The scraper drive mechanism (8) is a rodless cylinder, which is embedded in the bottom of the crossbeam (7) facing the wheel axle (2).

Images