Grass cutting blade head and weeder

Abstract

The present invention relates to the field of weeding technology and provides a grass cutting blade head and a weeder. The weeding mechanism includes a fixed plate (1) and multiple sets of mowing mechanisms mounted at intervals along the length of the fixed plate. The mowing mechanism includes a drive member (21) mounted on the fixed plate, a transmission assembly (22) including a transmission belt (221) and a drive pulley (222) and a driven pulley (223) connected to the drive end of the drive member, and a weeding blade head assembly (23) rotatably mounted on the fixed plate, with the driven pulley connected to the weeding blade head assembly and the transmission belt wound around the drive pulley and driven pulley. This solves the problems of conventional weeding blade heads, such as poor weeding effect, poor stability of the entire weeding device, and short service life.

Description

[Technical Field]

[0001] The present invention relates to the field of weeding technology, and more particularly to a weeding blade head and a weeder. [Background technology]

[0002] Weeders are important equipment in fields such as garden maintenance, agricultural management, and the operation and maintenance of new energy stations, and are widely used for weeding various grasslands. With the development of intelligent technology, robotic weeding equipment has gradually become popular, demonstrating significant advantages in improving work efficiency and reducing labor costs. However, when faced with complex terrain such as uneven ground, gravel-covered areas, or environments with accumulated debris, traditional weeders still face many challenges in terms of operational stability and blade life.

[0003] The blade head, a key component of a weeder that comes into direct contact with the workpiece, plays a crucial role in the overall system's operating efficiency, operational suitability, and equipment lifespan. Conventional blade heads generally come in nylon cord, steel wire cord, saw blade, mowing blade, and free-blade structures. Nylon cord and steel wire cord structures have good flexibility and a certain degree of cushioning capacity when in contact with hard objects, making them suitable for use in environments with many obstacles. However, their limited impact force makes them difficult to handle thick plants. Furthermore, the cord wears quickly, making them difficult to use for long periods of time. Saw blade and mowing blade heads have high rigidity and can effectively cut thick weeds, but their poor impact resistance makes them susceptible to breakage when colliding with the ground or crushed stone, posing a significant safety risk. Free-blade weed heads combine a flexible connection structure with a metal blade structure, providing a certain degree of impact resistance and mowing capacity. However, if the blade head is embedded in the ground or entangled with foreign objects, the cutter head may still be locked, and if the motor and cutter head are rigidly connected, the motor is likely to burn out or have a mechanical failure. Therefore, the suitability of conventional grass cutting blade heads in complex working environments, their anti-interference ability, and protection for the running motor are still insufficient, and there is an urgent need for an improved weeding blade head structure that can improve the weeding effect while effectively mitigating damage to the motor and transmission system caused by external impact, and enhancing the overall stability and service life of the weeder. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of this, the present invention provides a weeding blade head and a weeder that solves the problems of the conventional weeding blade head, such as poor weeding effect, poor stability of the entire weeding device, and short service life. [Means for solving the problem]

[0005] According to a first aspect, the present invention provides a grass cutting blade head, comprising: a fixed plate; and a plurality of sets of grass cutting mechanisms mounted on the fixed plate at intervals along the length of the fixed plate, the grass cutting mechanism comprising: a drive member mounted on the fixed plate; a transmission assembly including a transmission belt and a drive pulley and a driven pulley connected to the drive end of the drive member; and a grass cutting blade head assembly rotatably mounted on the fixed plate, the driven pulley being connected to the grass cutting blade head assembly, and the transmission belt being wound around the drive pulley and the driven pulley.

[0006] The drive member is connected to the drive pulley and rotates the driven pulley via a transmission belt, thereby rotating the cutting blade head assembly and realizing flexible transmission, which provides a buffer discharge path when the cutting blade head is caught by a foreign object or encounters a sudden change in impact load, reducing the risk of damage to the mechanical transmission system and effectively preventing the drive member from getting stuck or burning out.

[0007] In an alternative embodiment, the two sets of mowing mechanisms are spaced apart along the length of the fixed plate, and the directions of rotation of the cutting blade head assemblies in the two sets of mowing mechanisms are opposite to each other.

[0008] The two sets of cutting blade head assemblies rotate in opposite directions, generating opposing cutting force fields during the weeding process. This guides and concentrates the cut grass clippings toward the center of the fixed plate, reducing the scattering of grass clippings and facilitating their simultaneous collection in the subsequent process through cooperation with the weed collection mechanism. Furthermore, the opposing rotation also offsets to some extent the rotational moment generated between the cutting blade head assemblies, reducing yawing and vibration during the weeder's operation and improving operational stability.

[0009] In an alternative embodiment, each set of the mowing mechanism includes two sets of the cutting blade head assemblies spaced apart along the length of the fixed plate, the transmission assembly includes two of the driven pulleys, each of the driven pulleys is connected to one set of the cutting blade head assemblies, and the transmission belt is wound around the drive pulley and two of the driven pulleys.

[0010] In an optional embodiment, the grass cutting blade head assembly includes an intermediate shaft rotatably connected to the fixed plate, a transmission shaft having an upper end connected to the driven pulley and a lower end connected to the intermediate shaft, an intermediate tray connected to the bottom end of the intermediate shaft, and a grass cutting blade head connected to the intermediate tray.

[0011] In an alternative embodiment, a spacer is fitted onto the transmission shaft and is positioned between the driven pulley and the intermediate shaft.

[0012] The spacer regulates axial play between the driven pulley and the intermediate shaft and prevents structural loosening and wear of the intermediate shaft due to high-speed rotation, thereby improving the mechanical stability and service life of the transmission of the grass cutting blade head.

[0013] In an alternative embodiment, a bearing is provided on the fixed plate, and the intermediate shaft is rotatably connected to the fixed plate via the bearing.

[0014] In an alternative embodiment, the attacking blade head is a six-blade attacking blade head.

[0015] In an alternative embodiment, the drive member is a motor attached to the fixed plate via a raise pin.

[0016] In an alternative embodiment, the drive member is provided with a Hall sensing element suitable for detecting the number of revolutions of the drive member.

[0017] By acquiring information on the rotation speed of the drive end, it is possible to effectively evaluate the operating state and load fluctuations of the cutting blade head. If an abnormality occurs during the operation of the cutting blade head, such as a sudden change in rotation speed due to the blade head becoming tangled, caught, or colliding with a foreign object, the abnormality is quickly identified and an alarm is issued, and protective measures such as speed restriction, shutdown, or alarm are taken. This effectively prevents the drive member from being overloaded.

[0018] According to a second aspect, the present invention further provides a weeder, including the blade head and a traveling assembly, wherein a fixed plate of the blade head is connected to the traveling assembly.

[0019] The blade head can move along with the entire travel assembly, making it easier to continuously weed large areas or irregular terrain, improving the working efficiency of the blade head, while also ensuring stability of the blade head during operation and uniformity of contact with the ground. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a structural diagram of a brush cutting blade head according to an embodiment of the present invention; [Figure 2] 2 is a structural diagram of a grass cutting blade head assembly according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0021] In order to more clearly explain the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also derive other drawings based on these drawings without making any creative efforts.

[0022] In order to clarify the objectives, technical solutions and advantages of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any creative effort are all within the scope of protection of the present invention.

[0023] Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

[0024] According to one aspect of an embodiment of the present invention, a grass cutting blade head is provided, comprising a fixed plate 1 and a plurality of sets of grass cutting mechanisms spaced apart on the fixed plate 1 along the length of the fixed plate 1, the grass cutting mechanism comprising a drive member 21 mounted on the fixed plate 1, a transmission assembly 22 including a transmission belt 221 and a drive pulley 222 and a driven pulley 223 connected to the drive end of the drive member 21, and a grass cutting blade head assembly 23 rotatably mounted on the fixed plate 1, the driven pulley 223 connected to the grass cutting blade head assembly 23, and the transmission belt 221 wound around the drive pulley 222 and the driven pulley 223.

[0025] Specifically, the fixed plate 1 is a long steel structural member on which a plurality of mounting holes are provided for fixing the mowing mechanisms. The multiple sets of mowing mechanisms are spaced apart along the length of the fixed plate 1, with each set fixedly attached to the fixed plate 1, and are uniformly arranged overall. Therefore, the number of sets of mowing mechanisms can be flexibly adjusted based on actual mowing needs, allowing for various widths and complex mowing environments, improving the suitability of the mowing blade head and widening the range of applications.

[0026] The case of the drive member 21 is fixed directly to the upper surface of the fixed plate 1 with screws, and the output end faces the fixed plate 1 to output rotational power to the transmission assembly 22. The drive pulley 222 is fastened and connected to the output shaft of the motor via a key, and the driven pulley 223 is attached to the cutting blade head assembly 23, with the transmission belt 221 wound taut around each pulley to transmit the rotational power from the drive member 21 to the cutting blade head assembly 23.

[0027] The driven pulley 223 is located above the fixed plate 1, and the grass cutting blade head assembly 23 has an upper end connected to the driven pulley 223 and a lower end extending below the fixed plate 1 to facilitate grass cutting operations.

[0028] Furthermore, the transmission assembly 22 uses a belt transmission, which effectively realizes a flexible connection between the drive member 21 and the grass cutting blade head assembly 23. This not only increases transmission efficiency but also provides excellent buffering and vibration control capabilities, significantly reducing the risk of damage to the drive member 21 and transmission assembly 22 due to external impacts and extending the service life of the grass cutting blade head.

[0029] In one embodiment, the two sets of mowing mechanisms are spaced apart along the length of the fixed plate 1, and the directions of rotation of the mowing blade head assemblies 23 in the two sets of mowing mechanisms are opposite to each other.

[0030] In this embodiment, the two sets of mowing mechanisms are arranged as mirror images along the axis of the fixed plate 1, thereby minimizing interference between the grass-cutting blade head assemblies 23 during rotational movement and optimizing the mowing range.

[0031] The rotation directions of the cutting blade head assemblies 23 in the two sets of mowing mechanisms are opposite. For example, the cutting blade head assembly 23 on the left side of the fixed plate 1 rotates clockwise to mow, and the cutting blade head assembly 23 on the right side of the fixed plate 1 rotates counterclockwise to mow. When installing the two sets of drive members 21, the power supply polarity is reversed or the type of dedicated motor is changed so that the rotation directions of their output shafts are opposite.

[0032] Because the cutting blade head assemblies 23 rotate in opposite directions, the rotational force concentrates the cut grass in the center of the fixed plate 1, preventing it from scattering and contributing to the concentrated collection of cut grass in the subsequent process. At the same time, the moments generated by the opposing rotation of the two blade heads cancel each other out, improving the balance and operational stability of the entire cutting blade head.

[0033] In other embodiments, three, four, etc. sets of mowing mechanisms may be provided.

[0034] In one embodiment, each set of mowing mechanisms includes two sets of cutting blade head assemblies 23 spaced apart along the length of the fixed plate 1, the transmission assembly 22 includes two driven pulleys 223, each driven pulley 223 is connected to one set of cutting blade head assemblies 23, and the transmission belt 221 is wound around the drive pulley 222 and the two driven pulleys 223.

[0035] In this embodiment, each set of mowing mechanisms includes two sets of cutting blade head assemblies 23 spaced apart along the length of the fixed plate 1, i.e., a total of four cutting blade head assemblies 23 are provided on the cutting blade head, with the two cutting blade head assemblies 23 on the left side of the fixed plate 1 rotating clockwise and the two cutting blade head assemblies 23 on the right side of the fixed plate 1 rotating counterclockwise. In other embodiments, one, three, etc. sets of cutting blade head assemblies 23 may be provided, and the number of driven pulleys 223 corresponds to the number of cutting blade head assemblies 23 .

[0036] In one embodiment, the driving member 21 is a motor that is attached to the fixed plate 1 via a raising pin 211 .

[0037] Specifically, the driving member 21 is a motor, preferably a small, high-speed DC motor, which has a small volume and stable output torque, and meets the requirements for power continuity and responsiveness in grass mowing work.

[0038] To prevent the vibration of the mowing mechanism during operation from loosening the motor's structure or causing stress transmission, the motor is not rigidly connected directly to the fixed plate 1, but is attached via a set of lift pins 211. Specifically, the lift pins 211 are made of a strong, impact-resistant engineering plastic or lightweight alloy material and are provided at the four corners of the motor. The lift pins 211 are then fixed to the top surface of the fixed plate 1 with screws, and the motor is then attached to the lift pins 211.

[0039] In one embodiment, the drive member 21 is provided with a Hall sensing element suitable for detecting the number of revolutions of said drive member 21 .

[0040] Specifically, a Hall sensor is attached to the motor case, enabling real-time monitoring of the motor's operating status. The Hall sensor is located in the area of ​​the bearing 3 near the output end of the motor or on the edge of the case, and obtains a real-time rotation speed signal for the motor's output shaft by detecting changes in the magnetic field of the permanent magnet rotor inside the motor. The rotation speed data output from the Hall sensor can be input into the controller, enabling monitoring and feedback of the operating status of the mowing mechanism.

[0041] The detected rotation speed signal can be used to determine in real time whether the cutting blade head assembly 23 is operating normally, and a rotation speed threshold can be set by referring to the actual rotation speed of the cutting blade head assembly 23 to identify faults. If the rotation speed of the cutting blade head assembly 23 suddenly drops due to foreign matter getting caught or wrapped around it, the abnormal condition can be quickly identified and a stop or alarm mechanism can be triggered to protect the motor and transmission assembly 22 and prevent overload operation.

[0042] In one embodiment, the grass cutting blade head assembly 23 includes an intermediate shaft 232 rotatably connected to the fixed plate 1, a transmission shaft 231 having an upper end connected to the driven pulley 223 and a lower end connected to the intermediate shaft 232, an intermediate tray 233 connected to the bottom end of the intermediate shaft 232, and a grass cutting blade head 234 connected to the intermediate tray 233.

[0043] Specifically, a through hole is formed in the fixed plate 1, the intermediate shaft 232 is inserted into the through hole, and the intermediate shaft 232 can be provided rotatably relative to the fixed plate 1.

[0044] The transmission shaft 231 is a cylindrical shaft body arranged vertically, and its upper end is connected to the driven pulley 223 via a key and fastened with a screw, and its lower end passes through the axis of the intermediate shaft 232 and is connected to the intermediate shaft 232 via a key. The transmission shaft 231 mainly serves to transmit the rotational power of the driven pulley 223 downward to the intermediate shaft 232.

[0045] The relay tray 233 is mounted on the lower end of the relay shaft 232, i.e., located below the fixed plate 1, and is firmly connected to the bottom of the relay shaft 232 with screws. The relay tray 233 has a disc-shaped structure and is provided with several connection holes evenly distributed on the tray surface. The grass cutting blade head 234 is attached to the connection holes at the bottom of the relay tray 233 with screws, and the grass cutting blade head 234 has a certain free swing function so that it can retract and retract when colliding with a hard object, improving impact resistance.

[0046] In one embodiment, a spacer 235 is fitted onto the transmission shaft 231 and positioned between the driven pulley 223 and the intermediate shaft 232 .

[0047] Specifically, the spacer 235 has a hollow cylindrical structure and is preferably made of high-strength nylon or engineering plastic material, which has excellent wear resistance and a certain degree of elastic cushioning. The spacer 235 is fitted onto the outside of the transmission shaft 231, with its upper end inserted into the fixing groove of the driven pulley 223 and with a certain gap between it and the driven pulley 223, thereby fulfilling the functions of isolating and positioning the driven pulley 223, and its lower end contacting the top surface of the intermediate shaft 232.

[0048] The spacer 235 regulates the axial distance between the driven pulley 223 and the intermediate shaft 232, and can prevent the two from rattling or separating in the axial direction during high-speed operation.

[0049] In one embodiment, a bearing 3 is provided on the fixed plate 1 , and the intermediate shaft 232 is rotatably connected to the fixed plate 1 via the bearing 3 .

[0050] Specifically, the bearing 3 is a deep groove ball bearing that has excellent rotational accuracy and impact resistance. It is fitted between the fixed plate 1 and the outer wall of the intermediate shaft 232 and functions as a rotation guide for the intermediate shaft 232.

[0051] The upper end of the intermediate shaft 232 is inserted into the inner hole of the bearing 3, fitted into the bearing 3 and rotatably connected, a retaining cover for the bearing 3 is attached above the bearing 3, the inner ring of the bearing 3 is located below the spacer 235, and the outer ring of the bearing 3 is located below the retaining cover for the bearing 3.

[0052] In one embodiment, the gun head 234 is a six-blade gun head 234 .

[0053] Specifically, the six-lobed grass cutting blade head 234 includes one central cutter head and six metal blades evenly spaced around the edge of the cutter head, with a 60-degree spacing between any two blades.

[0054] The cutter head is a circular, rigid structure with a mounting hole in the center, which can be screwed to the intermediate tray 233. The blade is made of high-strength spring steel, which has excellent toughness and wear resistance.

[0055] According to another aspect of the present invention, there is further provided a weeder, which includes a traveling assembly and a blade head, and a fixed plate 1 of the blade head is connected to the traveling assembly.

[0056] Specifically, the traveling assembly uses a roller-type mobile platform or a four-wheel differential drive chassis, allowing it to mow diverse and complex terrains. The traveling assembly is equipped with a battery, electronic control system, and traveling motor, allowing it to move autonomously. The fixed plate 1 is directly connected to the front frame of the traveling assembly using a bolted fastening structure, making installation and maintenance easy.

[0057] The fixed plate 1 is attached to the bottom front end of the traveling assembly, and the grass cutting blade head 234 can protrude below the ground to a predetermined height, ensuring that the grass cutting blade head 234 makes reliable contact with weeds on the ground and performs cutting operations while the traveling assembly is traveling.

[0058] The weeder operates by linking the blade head with the travel assembly to continuously move across the grass area to perform efficient weeding, thereby improving weeding efficiency and reducing the need for manual intervention.

[0059] (Operation method) When the traveling assembly starts to move and advances at a uniform speed along the set path, the grass cutting blade head starts, and each set of motors starts to operate, rotating the drive pulley 222, and the power is transmitted to the driven pulley 223 via the transmission belt 221, which further rotates the grass cutting blade head assembly 23 at high speed, thereby realizing continuous cutting of weeds on the ground.

[0060] The cutting blade heads 234 on either side of the center line of the fixed plate 1 rotate in opposite directions, and the rotational force causes the cut grass to concentrate in the center of the fixed plate 1, contributing to the collective collection of cut grass. A Hall sensor is attached to the motor, which provides real-time feedback on the motor's rotation speed and allows the operating status of the cutting blade heads 234 to be monitored.

[0061] Although the embodiments of the present invention have been described with reference to the drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations are intended to be included within the scope of the utility model registration claims. [Explanation of symbols]

[0062] 1 Fixed plate 21 Driving member 211 Up Pin 22 Transmission Assembly 221 Transmission belt 222 Drive pulley 223 driven pulley 23 Grass-cutting blade head assembly 231 Transmission shaft 232 Intermediate shaft 233 Relay Tray 234 Grass-cutting blade head 235 Spacer 3 Bearings

Claims

1. A fixed plate (1), a plurality of sets of mowing mechanisms provided at intervals on the fixed plate (1) along the length of the fixed plate (1); The mowing mechanism includes: a driving member (21) provided on the fixed plate (1); a transmission assembly (22) including a transmission belt (221), a drive pulley (222) connected to the drive end of the drive member (21), and a driven pulley (223); and a grass cutting blade head assembly (23) rotatably mounted on the fixed plate (1), The driven pulley (223) is connected to the grass cutting blade head assembly (23), and the transmission belt (221) is wound around the drive pulley (222) and the driven pulley (223).

2. 2. The grass cutting blade head according to claim 1, wherein the two sets of grass cutting mechanisms are spaced apart along the length of the fixed plate (1), and the grass cutting blade head assemblies (23) of the two sets of grass cutting mechanisms rotate in opposite directions.

3. 3. The grass cutting blade head according to claim 2, wherein each set of the grass cutting mechanism includes two sets of the grass cutting blade head assemblies (23) spaced apart along the length of the fixed plate (1), the transmission assembly (22) includes two of the driven pulleys (223), each of the driven pulleys (223) is connected to one set of the grass cutting blade head assemblies (23), and the transmission belt (221) is wound around the drive pulley (222) and the two driven pulleys (223).

4. The grass cutting blade head assembly (23) an intermediate shaft (232) rotatably connected to the fixed plate (1); a transmission shaft (231) whose upper end is connected to the driven pulley (223) and whose lower end is connected to the intermediate shaft (232); a relay tray (233) connected to the bottom end of the relay shaft (232); 2. The grass cutting blade head according to claim 1, further comprising a grass cutting blade head (234) connected to the relay tray (233).

5. 5. The grass cutting blade head according to claim 4, wherein a spacer (235) positioned between the driven pulley (223) and the intermediate shaft (232) is fitted onto the transmission shaft (231).

6. 5. The grass cutting blade head according to claim 4, wherein a bearing (3) is provided on the fixed plate (1), and the intermediate shaft (232) is rotatably connected to the fixed plate (1) via the bearing (3).

7. 2. The brush cutting blade head of claim 1, wherein the brush cutting blade head (234) is a six-blade brush cutting blade head (234).

8. 2. A blade head according to claim 1, characterized in that the drive member (21) is a motor attached to the fixed plate (1) via a raising pin (211).

9. 9. A blade head according to claim 8, characterized in that the drive member (21) is provided with a Hall sensing element suitable for detecting the number of revolutions of the drive member (21).

10. A blade head according to any one of the preceding claims, further comprising a travelling assembly, wherein a fixed plate (1) in the blade head is connected to the travelling assembly.

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