Safety protection type portable hand-held mower cutter head

Abstract

The application relates to the field of mower cutter heads, and discloses a safe protection type portable handheld mower cutter head, which comprises a cutter head protective cover, the top surface of the cutter head protective cover is fixedly installed with a protective outer shell body, the outer surface of the protective outer shell body is fixedly installed with a limiting ring plate, the outer surface of the protective outer shell body is movably sleeved with a rotating ring plate below the limiting ring plate, the outer surface of the rotating ring plate is circumferentially installed with a plurality of arc-shaped protective baffle rods, the top surface of the limiting ring plate is provided with a limiting fixing mechanism connected with the rotating ring plate, the locking bolt on the limiting ring plate is loosened, the limiting ring plate is separated from the threaded hole on the top surface of the rotating ring plate, the rotating ring plate is easily rotated to a folding state at the rear side of the cutter head protective cover, at the moment, the arc-shaped protective baffle rods around the outer surface of the rotating ring plate are far away from the mower blade, and the rotation cutting operation of the blade is not affected, so that the safe protection and high-efficiency operation effect are realized.

Description

Technical Field

[0001] This application belongs to the field of lawnmower blade technology, specifically a safety-protected portable handheld lawnmower blade. Background Technology

[0002] A handheld lawnmower is a portable gardening tool suitable for maintaining vegetation in home backyards, small green spaces, and other spaces. Due to its small size and flexible operation, it is mainly used for trimming lawns and weeds. Compared with large lawnmowers, it is more convenient to move and has a lower barrier to entry. Its power unit is divided into two types: electric (such as lithium battery) and fuel-powered. It usually consists of a power unit, transmission system, operating handle, and blade head. Users can complete the lawnmower operation by hand. The blade head, as the core execution component, generally includes cutting blades, blade disc, protective cover, and connecting components. The cutting blades are mostly made of metal or high-strength engineering plastics. The blade disc is used to fix and support the blades and is connected to the transmission system. The protective cover covers the outside of the blades to ensure safety. The connecting components are responsible for firmly installing the blade head on the machine body.

[0003] While existing electric handheld lawnmower blades are equipped with protective covers to ensure safety, certain safety hazards still exist during actual operation and carrying. Due to the demands of lawnmowing, the protective covers cannot fully enclose the blades, and sufficient cutting space must be reserved. This results in some blade edges being exposed. When a person holds the handheld lawnmower, the exposed blades are prone to scraping or colliding with surrounding objects, which can easily cause damage such as chipping or deformation, affecting the subsequent cutting effect. At the same time, during carrying, especially in confined spaces or dense vegetation environments, the exposed blades pose a safety hazard. Therefore, a safe and protective portable handheld lawnmower blade is provided. Utility Model Content

[0004] The purpose of this application is to provide a safe and protective portable handheld lawnmower blade to solve the problems mentioned above.

[0005] The technical solution adopted in this application is as follows: a safety-protected portable handheld lawnmower blade, including a blade guard, a protective outer shell fixedly installed on the top surface of the blade guard, a limiting ring plate fixedly installed on the outer surface of the protective outer shell, a rotating ring plate movably sleeved on the outer surface of the protective outer shell below the limiting ring plate, a plurality of arc-shaped protective stops installed in a circumferential array on the outer surface of the rotating ring plate, and a limiting and fixing mechanism connected to the rotating ring plate provided on the top surface of the limiting ring plate.

[0006] In a preferred embodiment, the limiting and fixing mechanism includes a locking bolt and a threaded hole. The top surface of the limiting ring plate is threadedly connected to the locking bolt, and the top surface of the rotating ring plate is provided with a plurality of threaded holes arranged in a circumferential array. One end of the locking bolt is threadedly connected to the interior of one of the plurality of threaded holes.

[0007] In a preferred embodiment, a grass-cutting blade is provided inside the blade guard, and a motor is fixedly installed inside the protective shell. The drive end of the motor extends into the inside of the blade guard and is fixed to the grass-cutting blade by bolts.

[0008] In a preferred embodiment, a connecting rod is fixedly installed on the outer surface of the protective shell. A circular hole is provided at the end of the connecting rod away from the protective shell. Positioning grooves are symmetrically provided on the outer surface of the circular hole. A handheld connecting rod is provided at the end of the circular hole away from the protective shell. One end of the handheld connecting rod is inserted into the inside of the circular hole. A positioning protrusion corresponding to the positioning groove is fixedly installed on the outer surface of the handheld connecting rod. The positioning protrusion is inserted into the inside of the positioning groove.

[0009] In a preferred embodiment, two convenient handles are symmetrically fixedly installed on the top surface of the limiting ring plate.

[0010] In a preferred embodiment, the outer surface of the protective housing is provided with a plurality of heat dissipation holes symmetrically.

[0011] In a preferred embodiment, a threaded hole two is provided on one side of the positioning protrusion, and a fixing bolt corresponding to the threaded hole two is movably passed through one side of the connecting support rod, and the fixing bolt is threadedly connected inside the threaded hole two.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0013] 1. In this application, by adopting the above-mentioned solution, before starting the lawnmower, the locking bolts on the limiting ring plate are loosened to disengage it from the threaded hole on the top surface of the rotating ring plate. The rotating ring plate is then easily rotated to the retracted state behind the blade guard. The locking bolts are then used to re-secure it. At this time, the arc-shaped protective barrier surrounding the outer surface of the rotating ring plate is away from the mowing blade and does not affect the blade's rotation and cutting operation. After starting the motor, its drive end drives the mowing blade to rotate rapidly, efficiently trimming lawns and weeds. When the mowing operation is finished, the locking bolts are loosened again, and the rotating ring plate is rotated and unfolded. The arc-shaped protective barrier then surrounds the mowing blade, forming a tight protective barrier. After tightening the locking bolts, it can effectively prevent the blade from accidentally cutting people during transport or from being damaged by collisions with foreign objects. This device achieves both safety protection and efficient operation by flexibly rotating the arc-shaped protective barrier through the rotating ring plate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this application;

[0015] Figure 2 This is a schematic diagram of the limiting ring plate structure of this application;

[0016] Figure 3 This is a schematic diagram of the rotating ring plate structure of this application;

[0017] Figure 4 This is a schematic diagram of the internal structure of the cutter head guard in this application;

[0018] Figure 5 This is a schematic diagram of the arc-shaped protective barrier structure of this application;

[0019] Figure 6 This is a schematic diagram of the connecting support structure of this application.

[0020] The markings in the diagram are: 1. Blade guard; 2. Protective outer shell; 3. Limiting ring plate; 4. Rotating ring plate; 5. Arc-shaped protective stop bar; 6. Limiting and fixing mechanism; 601. Locking bolt; 602. Threaded hole one; 7. Grass cutting blade; 8. Connecting support rod; 9. Circular hole; 10. Positioning groove; 11. Handheld connecting rod; 12. Positioning protrusion; 13. Convenient handle; 14. Heat dissipation hole; 15. Fixing bolt; 16. Threaded hole two. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] refer to Figures 1-6As shown, a safety-protected portable handheld lawnmower blade includes a blade guard 1, a protective outer shell 2 fixedly mounted on the top surface of the blade guard 1, a lawnmower blade 7 disposed inside the blade guard 1, and a motor fixedly mounted inside the protective outer shell 2. The drive end of the motor extends into the interior of the blade guard 1 and is fixed to the lawnmower blade 7 by bolts. Multiple heat dissipation holes 14 are symmetrically opened on the outer surface of the protective outer shell 2. The blade guard 1 provides basic protection for the lawnmower blade 7, reducing the risk of blade exposure when not in operation. The motor built into the protective outer shell 2 can directly drive the lawnmower blade 7, shortening the transmission path and improving power transmission efficiency. The heat dissipation holes 14 can quickly dissipate the heat generated by the generator, preventing motor performance degradation or failure due to high temperature, extending the service life of the equipment, and reducing safety hazards caused by overheating.

[0023] refer to Figures 1-6 As shown, a limiting ring plate 3 is fixedly installed on the outer surface of the protective shell 2. Two convenient handles 13 are symmetrically fixedly installed on the top surface of the limiting ring plate 3. A rotating ring plate 4 is movably sleeved on the outer surface of the protective shell 2 below the limiting ring plate 3. Multiple arc-shaped protective bars 5 are installed in a circumferential array on the outer surface of the rotating ring plate 4. A limiting and fixing mechanism 6 connected to the rotating ring plate 4 is provided on the top surface of the limiting ring plate 3. Through the cooperation of the limiting ring plate 3 and the rotating ring plate 4, personnel can achieve dynamic protection of the lawnmower blade 7 through the arc-shaped protective bars 5. When the lawnmower is working... When in operation, the rotating ring plate 4 can rotate the arc-shaped protective bar 5 to a position where it is not obstructed behind the cutter head protective cover 1, thus retracting the arc-shaped protective bar 5 without affecting the cutting of the blade. In the non-working state, the rotating ring plate 4 rotates and unfolds, with the arc-shaped protective bar 5 surrounding the outside of the blade to prevent foreign objects from contacting the blade and to prevent the operator from accidentally touching it. The convenient handle 13 makes it easy for personnel to carry and hold the cutter head for movement, improving the convenience of operation. The limiting and fixing mechanism 6 ensures that the rotating ring plate 4 is firmly locked in a specific position to prevent it from accidentally sliding or shifting.

[0024] refer to Figures 1-6 As shown, the limiting and fixing mechanism 6 includes a locking bolt 601 and a threaded hole 602. The top surface of the limiting ring plate 3 is threaded with the locking bolt 601, and the top surface of the rotating ring plate 4 has multiple threaded holes 602 arranged in a circumferential array. One end of the locking bolt 601 is threaded into the interior of one of the multiple threaded holes 602. Through the combination of the locking bolt 601 and the threaded hole 602, the operator can quickly switch the position of the rotating ring plate 4 and the arc-shaped protective stop bar 5 by tightening or loosening the locking bolt 601 according to actual needs (such as working or storage status). The operation is simple and the fixing effect is firm.

[0025] refer to Figures 1-6As shown, a connecting rod 8 is fixedly installed on the outer surface of the protective shell 2. A circular hole 9 is opened at the end of the connecting rod 8 away from the protective shell 2. A positioning groove 10 is symmetrically opened on the outer surface of the circular hole 9. A handheld connecting rod 11 is provided at the end of the circular hole 9 away from the protective shell 2. One end of the handheld connecting rod 11 is inserted into the interior of the circular hole 9. A positioning protrusion 12 corresponding to the positioning groove 10 is fixedly installed on the outer surface of the handheld connecting rod 11. The positioning protrusion 12 is inserted into the interior of the positioning groove 10. The connecting rod 8, the circular hole 9, the positioning groove 10, the handheld connecting rod 11, and the positioning protrusion 12 form a fast connection. The quick-connect structure facilitates easy assembly and disassembly of the blade head and the lawnmower body, improving equipment maintenance and replacement efficiency. The positioning protrusion 12 and positioning groove 10 work together to ensure precise alignment of the blade head during installation, preventing installation deviations from affecting the lawnmower's balance and cutting effect. It also enhances the stability of the connection between the blade head and the body, preventing shaking or detachment during use. A cable connector is installed inside the circular hole 9, and a socket compatible with the cable connector is installed at one end of the handheld connecting rod 11. When the handheld connecting rod 11 is connected to the connecting support rod 8, the connector and socket are compatible, facilitating the transmission of external power.

[0026] refer to Figures 1-6 As shown, a threaded hole 16 is provided on one side of the positioning protrusion 12, and a fixing bolt 15 corresponding to the threaded hole 16 is movably inserted on one side of the connecting support rod 8. The fixing bolt 15 is threaded into the inside of the threaded hole 16. The connection between the handheld connecting rod 11 and the connecting support rod 8 can be further strengthened by the fixing bolt 15 and the threaded hole 16. The threaded fastening method can withstand greater tension and torque. Especially in the high-frequency vibration working scenario of the lawnmower, it can effectively prevent the blade from loosening and ensure operational safety. At the same time, it is convenient for users to perform in-depth inspection or replacement of parts of the blade by disassembling the fixing bolt 15.

[0027] The implementation principle of the safety protection type portable handheld lawnmower blade of this application is as follows: When in use, the person first accurately aligns the positioning protrusion 12 at one end of the handheld connecting rod 11 with the positioning groove 10 in the circular hole 9 at one end of the connecting rod 8 and inserts it. Then, the fixing bolt 15 is tightened so that it is tightly engaged with the threaded hole 16. In this way, the blade can be stably installed with the handheld connecting rod 11, and the connector inside the circular hole 9 can be smoothly connected with the socket of the handheld connecting rod 11, so as to provide stable power supply to the motor inside the protective shell 2.

[0028] Before starting the lawnmower, loosen the locking bolt 601 on the limiting ring plate 3 to disengage it from the threaded hole 602 on the top surface of the rotating ring plate 4. Then, easily rotate the rotating ring plate 4 to the retracted position behind the blade guard 1. Re-secure it using the locking bolt 601. At this point, the arc-shaped protective bar 5 surrounding the outer surface of the rotating ring plate 4 is far from the mowing blade 7, completely unaffecting the high-speed rotation and cutting operation of the blade. After starting the motor, its drive end drives the mowing blade 7 to rotate rapidly, efficiently trimming lawns and weeds. Simultaneously, the heat dissipation holes 14 on the outer surface of the protective housing 2 continuously dissipate the heat from the generator, ensuring motor stability. When the mowing operation is finished, loosen the locking bolt 601 again, rotate the rotating ring plate 4 to unfold, and the arc-shaped protective barrier 5 will then surround the mowing blade 7 to form a tight protective barrier. After tightening the locking bolt 601 to fix it, it can effectively prevent the blade from accidentally cutting people during the carrying and moving process, or from being damaged by collision with foreign objects. The convenient handle 13 on the top surface of the limiting ring plate 3 makes it easy to carry and move the blade. The device can take into account the efficiency during operation and the safety when not in operation by rotating the ring plate 4 to drive the arc-shaped protective barrier 5. It can achieve the effect of safety protection and efficient operation.

[0029] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A safety-protected portable handheld lawnmower blade, comprising a blade guard (1), characterized in that: The top surface of the cutter head protective cover (1) is fixedly installed with a protective outer shell (2). The outer surface of the protective outer shell (2) is fixedly installed with a limiting ring plate (3). The outer surface of the protective outer shell (2) is movably fitted with a rotating ring plate (4) below the limiting ring plate (3). The outer surface of the rotating ring plate (4) is equipped with multiple arc-shaped protective stops (5) in a circular array. The top surface of the limiting ring plate (3) is provided with a limiting and fixing mechanism (6) connected to the rotating ring plate (4).

2. The safety-protected portable handheld lawnmower blade as described in claim 1, characterized in that: The limiting and fixing mechanism (6) includes a locking bolt (601) and a threaded hole (602). The top surface of the limiting ring plate (3) is threaded with a locking bolt (601). The top surface of the rotating ring plate (4) is provided with multiple threaded holes (602) in a circumferential array. One end of the locking bolt (601) is threaded into the interior of one of the multiple threaded holes (602).

3. The safety-protected portable handheld lawnmower blade as described in claim 1, characterized in that: The blade guard (1) is equipped with a grass-cutting blade (7), and a motor is fixedly installed inside the protective shell (2). The drive end of the motor extends into the inside of the blade guard (1) and is fixed to the grass-cutting blade (7) by bolts.

4. The safety-protected portable handheld lawnmower blade as described in claim 1, characterized in that: A connecting rod (8) is fixedly installed on the outer surface of the protective shell (2). A circular hole (9) is opened at one end of the connecting rod (8) away from the protective shell (2). A positioning groove (10) is symmetrically opened on the outer surface of the circular hole (9). A hand-held connecting rod (11) is provided at one end of the circular hole (9) away from the protective shell (2). One end of the hand-held connecting rod (11) is inserted into the inside of the circular hole (9). A positioning protrusion (12) corresponding to the positioning groove (10) is fixedly installed on the outer surface of the hand-held connecting rod (11). The positioning protrusion (12) is inserted into the inside of the positioning groove (10).

5. The safety-protected portable handheld lawnmower blade as described in claim 1, characterized in that: Two convenient handles (13) are symmetrically fixedly installed on the top surface of the limiting ring plate (3).

6. The safety-protected portable handheld lawnmower blade as described in claim 1, characterized in that: The outer surface of the protective outer shell (2) is symmetrically provided with multiple heat dissipation holes (14).

7. The safety-protected portable handheld lawnmower blade as described in claim 4, characterized in that: The positioning protrusion (12) has a threaded hole (16) on one side, and the connecting support rod (8) has a fixing bolt (15) corresponding to the threaded hole (16) on one side. The fixing bolt (15) is threaded into the inside of the threaded hole (16).

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