Mowing cutter head and weeding machine

Abstract

The utility model relates to the technical field of weeding, and discloses a mowing cutter head and a weeding machine, the mowing cutter head comprises a fixed plate and mowing mechanisms, a plurality of groups of mowing mechanisms are arranged on the fixed plate at intervals along the length direction of the fixed plate, each mowing mechanism comprises a driving part, a transmission assembly and a mowing cutter head assembly, the driving part is arranged on the fixed plate, and the transmission assembly is arranged on the transmission assembly. The transmission assembly comprises a transmission belt, a driving belt wheel and a driven belt wheel, the driving belt wheel is connected with the driving end of the driving part, the grass cutting tool bit assembly is rotationally arranged on the fixing plate, the driven belt wheel is connected with the grass cutting tool bit assembly, and the transmission belt is wound around the driving belt wheel and the driven belt wheel. The weeding tool bit solves the problems that an existing weeding tool bit is poor in weeding effect, and weeding equipment is poor in overall stability and short in service life.

Description

Technical Field

[0001] This utility model relates to the field of weeding technology, specifically to a weeding blade and a weeding machine. Background Technology

[0002] Weeders are essential equipment in landscaping maintenance, agricultural management, and the operation and maintenance of new energy power plants, and are widely used for weeding operations on various types of grasslands. With the development of intelligent technology, robotic weeding equipment is becoming increasingly common, demonstrating significant advantages in improving operational efficiency and reducing labor costs. However, when facing complex terrains such as undulating ground, gravel cover, or debris accumulation, traditional weeders still face many technical bottlenecks in terms of operational stability and blade life.

[0003] As a key component of a lawnmower that directly contacts the target area, the structural design, material properties, and power connection method of the mowing head play a decisive role in the overall operating efficiency, operational adaptability, and equipment lifespan. Existing mowing heads generally have structures such as nylon rope, wire rope, saw blade, cutter, and swivel blade. Nylon rope and wire rope structures offer good flexibility and some cushioning when encountering hard objects, making them suitable for scenarios with many obstacles. However, their striking force is limited, making them difficult to handle thick vegetation, and the ropes wear out quickly, hindering long-term use. Saw blade and cutter blade heads have high rigidity and can effectively cut thicker weeds, but their impact resistance is poor, making them prone to damage upon impact with the ground or gravel, posing a significant safety hazard. Swing blade mowing heads combine flexible connections with metal blade structures, providing a certain degree of impact resistance and cutting ability. However, when the blade head becomes embedded in the ground or entangled in foreign objects, it can still cause the blade disc to stall. If the connection between the motor and the blade disc is rigid, this can easily lead to motor burnout or mechanical failure. Therefore, the existing weeding blades are still insufficient in terms of adaptability, anti-interference ability and protection performance of the running motor in complex working environments. There is an urgent need for a structurally improved weeding blade that can improve the weeding effect while effectively mitigating the damage of external impacts to the motor and transmission system, and enhancing the overall stability and service life of the weeding machine. Utility Model Content

[0004] In view of this, the present invention provides a weeding blade and a weeding machine to solve the problems of poor weeding effect of existing weeding blades, poor overall stability of weeding equipment, and short service life.

[0005] In a first aspect, this utility model provides a lawnmower blade, comprising:

[0006] Fixing plate;

[0007] A mowing mechanism, comprising multiple sets of mowing mechanisms spaced apart along the length of a fixed plate, includes a driving component, a transmission assembly, and a cutting head assembly. The driving component is mounted on the fixed plate, and the transmission assembly includes a transmission belt, a driving pulley, and a driven pulley. The driving pulley is connected to the driving end of the driving component. The cutting head assembly is rotatably mounted on the fixed plate, and the driven pulley is connected to the cutting head assembly. The transmission belt is wound around the driving pulley and the driven pulley.

[0008] Beneficial effects

[0009] The drive unit is connected to the active pulley, and drives the driven pulley to rotate through the transmission belt, thereby driving the grass trimmer head assembly to rotate. This achieves flexible transmission and provides a buffer release path when the grass trimmer head encounters foreign objects or sudden impact load changes, reducing the risk of damage to the mechanical transmission system and effectively preventing the drive unit from stalling or burning out.

[0010] In one alternative embodiment, the two sets of mowing mechanisms are spaced apart along the length of the fixed plate, and the cutting blade assemblies in the two sets of mowing mechanisms rotate in opposite directions.

[0011] Beneficial effects

[0012] The two sets of cutting blade assemblies rotate in opposite directions. During the cutting process, each blade generates opposing cutting force fields, guiding the cut grass clippings to the center of the fixed plate, reducing scattering and facilitating subsequent collection by the grass-collecting mechanism. Furthermore, the opposing rotation also balances the rotational torque generated between the blade assemblies, reducing sway and vibration during weeding machine operation and improving operational stability.

[0013] In one alternative embodiment, each set of the mowing mechanism includes two sets of mowing head assemblies spaced apart along the length of the fixed plate, and the transmission assembly includes two driven pulleys, each driven pulley being connected to one set of mowing head assemblies, and the transmission belt being wound around the driving pulley and the two driven pulleys.

[0014] In one optional embodiment, the grass trimmer head assembly includes: a drive shaft, a transfer shaft, a transfer plate, and a grass trimmer head. The transfer shaft is rotatably connected to the fixed plate. The upper end of the drive shaft is connected to the driven pulley, and the lower end is connected to the transfer shaft. The transfer plate is connected to the bottom end of the transfer shaft, and the grass trimmer head is connected to the transfer plate.

[0015] In one alternative embodiment, a spacer is fitted onto the drive shaft, and the spacer is located between the driven pulley and the adapter shaft.

[0016] Beneficial effects

[0017] The spacer can limit the axial movement between the driven pulley and the adapter shaft, preventing structural loosening or wear of the adapter shaft caused by high-frequency rotation, thereby improving the mechanical stability and service life of the lawnmower head drive.

[0018] In one alternative embodiment, a bearing is provided on the fixed plate, and the adapter shaft is rotatably connected to the fixed plate through the bearing.

[0019] In one optional implementation, the grass cutter head is a six-bladed grass cutter head.

[0020] In one alternative embodiment, the driving component is a motor, which is mounted on the fixed plate via a shim column.

[0021] In one alternative embodiment, the drive unit is provided with a Hall effect detection element, which is adapted to detect the rotational speed of the drive unit.

[0022] Beneficial effects

[0023] By acquiring the speed information of the drive end, the working status and load changes of the mowing head can be effectively assessed. When abnormalities occur during the operation of the mowing head, such as the head becoming entangled, stuck, or colliding with foreign objects causing a sudden change in speed, the system can quickly identify and issue a warning, and take timely protective measures such as speed limiting, stopping, or alarming, thereby effectively avoiding overload of the drive components.

[0024] Secondly, this utility model also provides a weeding machine, wherein the weeding cutter head further includes a walking assembly, and the fixing plate in the weeding cutter head is connected to the walking assembly.

[0025] Beneficial effects

[0026] The mowing head can move with the machine's walking assembly, facilitating continuous weeding operations in large areas or irregular terrain, thus improving the mowing head's efficiency. At the same time, it also ensures the stability and consistent ground contact of the mowing head during operation. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1This is a schematic diagram of the structure of a lawnmower head according to an embodiment of the present utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the grass trimmer head assembly according to an embodiment of the present utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Fixing plate;

[0032] 21. Drive component; 211. Elevating column; 22. Transmission assembly; 221. Drive belt; 222. Drive pulley; 223. Driven pulley; 23. Grass trimmer head assembly; 231. Drive shaft; 232. Adapter shaft; 233. Adapter plate; 234. Grass trimmer head; 235. Spacer.

[0033] 3. Bearings. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] The following is combined Figures 1 to 2 The following describes embodiments of the present invention.

[0036] According to an embodiment of the present invention, a lawn mower head is provided, comprising: a fixed plate 1 and a mowing mechanism, wherein multiple sets of mowing mechanisms are spaced apart along the length of the fixed plate 1, and the mowing mechanism comprises: a driving member 21, a transmission assembly 22 and a mowing head assembly 23, wherein the driving member 21 is disposed on the fixed plate 1, and the transmission assembly 22 comprises: a transmission belt 221, a driving pulley 222 and a driven pulley 223, wherein the driving pulley 222 is connected to the driving end of the driving member 21, the mowing head assembly 23 is rotatably disposed on the fixed plate 1, the driven pulley 223 is connected to the mowing head assembly 23, and the transmission belt 221 is wound around the driving pulley 222 and the driven pulley 223.

[0037] Specifically, the fixing plate 1 is a long, strip-shaped steel structure with several mounting holes for fixing the mowing mechanism. Multiple sets of mowing mechanisms are spaced apart along the length of the fixing plate 1, each set of mowing mechanisms being fixedly mounted on the fixing plate 1, and the overall arrangement is uniform. Therefore, the number of multiple sets of mowing mechanisms can be flexibly adjusted according to actual mowing operation needs, making it suitable for different widths and complex mowing operation environments, thus improving the adaptability and expandability of the mowing head.

[0038] The housing of the drive unit 21 is directly fixed to the upper surface of the fixing plate 1 with screws, and the output end faces the fixing plate 1 to output rotational power to the transmission assembly 22. The driving pulley 222 is fastened to the motor output shaft by key transmission, the driven pulley 223 is mounted on the grass trimmer head assembly 23, and the transmission belt 221 is tensioned and wound around each pulley to realize the transmission of rotational power from the drive unit 21 to the grass trimmer head assembly 23.

[0039] Driven pulley 223 is located above fixed plate 1. The upper end of grass cutting head assembly 23 is connected to driven pulley 223, and the lower end extends to the bottom of fixed plate 1 to facilitate grass cutting.

[0040] Secondly, the transmission assembly 22 adopts a belt drive, which effectively realizes the flexible connection between the drive component 21 and the grass cutting head assembly 23. It not only has high transmission efficiency, but also has good buffering and vibration reduction capabilities, significantly reducing the risk of damage to the drive component 21 and the transmission assembly 22 from external impacts, thereby extending the service life of the grass cutting head.

[0041] In one embodiment, two sets of mowing mechanisms are spaced apart along the length of the fixed plate 1, and the cutting head assemblies 23 in the two sets of mowing mechanisms rotate in opposite directions.

[0042] In this embodiment, the two sets of mowing mechanisms are mirror-arranged along the axis of the fixed plate 1 to ensure that the interference between the mowing blade assembly 23 during rotation is minimized and the mowing coverage is optimized.

[0043] The blade assembly 23 in the two sets of mowing mechanisms rotates in opposite directions. For example, the blade assembly 23 on the left side of the fixed plate 1 rotates clockwise to mow the grass, while the blade assembly 23 on the right side of the fixed plate 1 rotates counterclockwise to mow the grass. The two sets of drive components 21 are installed by reversing the power supply polarity or changing the type of dedicated motor, so that the rotation direction of their output shafts is reversed.

[0044] The opposite rotation of the grass cutting head assembly 23 allows the cut grass clippings to converge towards the center of the fixed plate 1 under the action of rotational force, preventing the grass clippings from scattering and facilitating the centralized recycling and processing of the grass clippings in the future. At the same time, the torques generated by the two blades rotating in opposite directions can also cancel each other out, improving the overall balance and operational stability of the grass cutting head.

[0045] In other embodiments, three, four, or other sets of mowing mechanisms may also be provided.

[0046] In one embodiment, each mowing mechanism includes two sets of mowing 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 being connected to a set of mowing head assemblies 23. The transmission belt 221 is wound around the driving pulley 222 and the two driven pulleys 223.

[0047] In this embodiment, each grass-cutting mechanism includes two sets of grass-cutting head assemblies 23 spaced apart along the length of the fixed plate 1. That is, the grass-cutting head is provided with a total of four grass-cutting head assemblies 23. The two grass-cutting head assemblies 23 on the left side of the fixed plate 1 rotate clockwise, and the two grass-cutting head assemblies 23 on the right side of the fixed plate 1 rotate counterclockwise.

[0048] In other embodiments, one or three sets of equal numbers of grass-cutting head assemblies 23 may be provided, with the number of driven pulleys 223 corresponding accordingly.

[0049] In one embodiment, the driving component 21 is a motor, which is mounted on the fixed plate 1 via a shim column 211.

[0050] Specifically, the drive component 21 is a motor, preferably a small high-speed DC motor, which is small in size and has stable output torque, making it suitable for the requirements of power continuity and responsiveness in lawn mowing operations.

[0051] To prevent structural loosening or stress transmission of the motor due to vibration of the mowing mechanism during operation, the motor is not directly and rigidly connected to the fixing plate 1, but is installed through a set of support posts 211. Specifically, the support posts 211 are made of sturdy and impact-resistant engineering plastics or lightweight alloy materials, and are set at the four corners of the motor. The support posts 211 are fixed to the upper surface of the fixing plate 1 with screws, and then the motor is installed on the support posts 211.

[0052] In one embodiment, a Hall effect sensor is provided on the drive unit 21, which is adapted to detect the rotational speed of the drive unit 21.

[0053] Specifically, a Hall effect sensor is installed on the motor housing, enabling real-time monitoring of the motor's operating status. This sensor is located near the bearing area (3) or the edge of the housing, close to the motor's output end. It acquires the real-time rotational speed signal of the motor's output shaft by sensing changes in the magnetic field of the permanent magnet rotor inside the motor. The rotational speed data output by the Hall effect sensor can be connected to a controller to monitor and provide feedback on the mowing mechanism's operating status.

[0054] The measured speed signal can be used to determine in real time whether the grass trimmer head assembly 23 is in normal working condition. It can also be combined with the actual speed of the grass trimmer head assembly 23 to set a speed threshold for fault identification. When the grass trimmer head assembly 23 is stuck or entangled by foreign objects, causing a sudden drop in speed, the abnormal state can be identified in time and a shutdown or alarm mechanism can be triggered to protect the motor and transmission assembly 22 and prevent overload operation.

[0055] In one embodiment, the grass trimmer head assembly 23 includes: a drive shaft 231, a transition shaft 232, a transition plate 233, and a grass trimmer head 234. The transition shaft 232 is rotatably connected to the fixed plate 1. The upper end of the drive shaft 231 is connected to the driven pulley 223, and the lower end is connected to the transition shaft 232. The transition plate 233 is connected to the bottom end of the transition shaft 232, and the grass trimmer head 234 is connected to the transition plate 233.

[0056] Specifically, the fixed plate 1 has a through hole, the adapter shaft 232 is inserted into the through hole, and the adapter shaft 232 can be rotated relative to the fixed plate 1.

[0057] The drive shaft 231 is a longitudinally arranged cylindrical shaft. Its upper end is keyed to the driven pulley 223 and fastened with screws; its lower end passes through the axis of the adapter shaft 232 and is also keyed to the adapter shaft 232. The drive shaft 231 is mainly responsible for transmitting the rotational power of the driven pulley 223 downward to the adapter shaft 232.

[0058] The adapter plate 233 is located at the lower end of the adapter shaft 232, specifically below the fixing plate 1, and is securely connected to the bottom of the adapter shaft 232 by screws. The adapter plate 233 is a disc-shaped structure with several evenly distributed connection holes on its surface. The grass trimmer head 234 is mounted on the connection holes at the bottom of the adapter plate 233 by screws, and the grass trimmer head 234 has a certain degree of free swing capability, allowing it to retract and avoid hard objects, thus improving its impact resistance.

[0059] In one embodiment, a spacer 235 is fitted on the drive shaft 231, and the spacer 235 is located between the driven pulley 223 and the adapter shaft 232.

[0060] Specifically, the spacer 235 has a hollow cylindrical structure and is preferably made of high-strength nylon or engineering plastic material, which has good wear resistance and a certain elastic cushioning performance. The spacer 235 is sleeved on the outside of the drive shaft 231, with its upper end inserted into the fixing groove of the driven pulley 223 and leaving a certain gap between it and the driven pulley 223, which plays a role in isolating and positioning the driven pulley 223, while its lower end contacts the top surface of the adapter shaft 232.

[0061] The spacer 235 can limit the axial distance between the driven pulley 223 and the adapter shaft 232, preventing axial movement or loosening of the two during high-speed operation.

[0062] In one embodiment, a bearing 3 is provided on the fixed plate 1, and the adapter shaft 232 is rotatably connected to the fixed plate 1 through the bearing 3.

[0063] Specifically, bearing 3 is a deep groove ball bearing 3, which has good rotational accuracy and impact resistance. It is embedded between the fixed plate 1 and the outer wall of the adapter shaft 232 to provide rotational guidance for the adapter shaft 232.

[0064] The upper end of the adapter shaft 232 is inserted into the inner hole of the bearing 3 and rotates with the bearing 3. A bearing 3 cover is installed 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 bearing 3 cover.

[0065] In one embodiment, the grass trimmer head 234 is a six-bladed grass trimmer head 234.

[0066] Specifically, the six-blade grass cutter head 234 includes a central blade disc and six metal blades evenly arranged around the edge of the blade disc, with a 60-degree interval between each pair of blades.

[0067] The cutter head is a circular steel structure with a mounting hole in the center, allowing it to be connected to the adapter plate 233 via screws. The blades are made of high-strength spring steel, possessing excellent toughness and wear resistance.

[0068] According to an embodiment of the present invention, another aspect provides a weeding machine, which includes a walking assembly and a cutting head, wherein a fixing plate 1 in the cutting head is connected to the walking assembly.

[0069] Specifically, the walking assembly uses a tracked mobile platform or a four-wheel differential drive chassis, capable of adapting to various complex grass-cutting terrains. The walking assembly houses a battery, electronic control system, and walking motor, enabling autonomous movement. The mounting plate 1 is directly connected to the front frame of the walking assembly using a bolt-fastening structure, facilitating disassembly and maintenance.

[0070] The fixing plate 1 is installed at the bottom front end of the walking component, and the grass cutting head 234 can extend to a certain height below the ground to ensure that the grass cutting head 234 can fully contact the ground weeds and perform cutting operations during the walking process.

[0071] The lawnmower enables the cutting head to move continuously with the walking component in the grass area to perform efficient weeding operations, which improves the efficiency of weeding operations and reduces the need for manual intervention.

[0072] Operating method:

[0073] The walking component starts moving and advances at a constant speed along the set route. The grass cutting head starts accordingly, and each set of motors starts running, driving the drive pulley 222 to rotate. The power is transmitted to the driven pulley 223 via the transmission belt 221, and further drives the grass cutting head assembly 23 to rotate at high speed, so as to achieve continuous cutting of weeds on the ground.

[0074] The cutting blades 234 on either side of the center line of the fixed plate 1 rotate in opposite directions. Under the action of rotational force, the cut grass clippings are concentrated towards the center of the fixed plate 1, which is conducive to the unified recycling and processing of the grass clippings. A Hall effect sensor is installed on the motor to provide real-time feedback on the motor speed and monitor the working status of the cutting blades 234.

[0075] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A lawnmower blade, characterized in that, include: Fixing plate (1); A mowing mechanism, wherein multiple sets of the mowing mechanisms are spaced apart along the length of the fixed plate (1), the mowing mechanism includes: a driving member (21), a transmission assembly (22) and a mowing head assembly (23), the driving member (21) is disposed on the fixed plate (1), the transmission assembly (22) includes: a transmission belt (221), a driving pulley (222) and a driven pulley (223), the driving pulley (222) is connected to the driving end of the driving member (21), the mowing head assembly (23) is rotatably disposed on the fixed plate (1), the driven pulley (223) is connected to the mowing head assembly (23), and the transmission belt (221) is wound around the driving pulley (222) and the driven pulley (223).

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

3. The lawnmower head according to claim 2, characterized in that, Each set of the mowing mechanism includes two sets of mowing 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 mowing head assemblies (23). The transmission belt (221) is wound around the driving pulley (222) and the two driven pulleys (223).

4. The lawnmower head according to claim 1, characterized in that, The grass trimmer head assembly (23) includes: a drive shaft (231), a transfer shaft (232), a transfer plate (233), and a grass trimmer head (234). The transfer shaft (232) is rotatably connected to the fixed plate (1). The upper end of the drive shaft (231) is connected to the driven pulley (223), and the lower end is connected to the transfer shaft (232). The transfer plate (233) is connected to the bottom end of the transfer shaft (232), and the grass trimmer head (234) is connected to the transfer plate (233).

5. The lawnmower head according to claim 4, characterized in that, A spacer (235) is fitted on the drive shaft (231), and the spacer (235) is located between the driven pulley (223) and the adapter shaft (232).

6. The lawnmower head according to claim 4, characterized in that, The fixed plate (1) is provided with a bearing (3), and the adapter shaft (232) is rotatably connected to the fixed plate (1) through the bearing (3).

7. The lawnmower head according to claim 1, characterized in that, The grass cutting head (234) is a six-bladed grass cutting head (234).

8. The lawnmower head according to claim 1, characterized in that, The driving component (21) is a motor, which is mounted on the fixing plate (1) via a shim column (211).

9. The lawnmower head according to claim 8, characterized in that, The drive unit (21) is provided with a Hall detection element, which is adapted to detect the rotational speed of the drive unit (21).

10. A weeding machine, comprising the mowing blade as described in any one of claims 1-9, characterized in that, It also includes a walking assembly, wherein the fixing plate (1) in the mowing head is connected to the walking assembly.

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