Lawn mower with protective structure
The grass trimmer incorporates retractable blades and adjustable protective shields to address safety and usability issues, enhancing safety and adaptability in grass trimming operations.
Patent Information
- Application Number
- CN202510590225.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2025-07-15
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing lawn mowers lack protective structures, which causes damage to the operator's accidental contact of the blade, and the distance between the blade and the grass cannot be adjusted, limiting its scope of application.
A lawn mower with a protective structure is designed, including a protective plate and an adjustable blade hiding mechanism, which hides the blade in the support frame when the blade stops working, prevents mistouching, and adjusts the distance between the blade and the grass by adjusting the distance between the protective plate and the support frame.
It effectively avoids the risk of operators touching the blade by mistake, improves the safety of the lawn mower, and enhances the scope of application and operation stability of the lawn mower by adjusting the distance between the blade and the grass.
Smart Images
Figure CN120304145A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of mowing equipment, and specifically relates to a lawn mower with a protection structure. Background Art
[0002] A lawn mower is also known as a weeding machine, a grass cutting machine, a lawn trimmer, etc. A lawn mower is a mechanical tool used for trimming lawns, vegetation, etc. It is composed of a cutter head, an engine, walking wheels, a walking mechanism, blades, a handrail, and a control part. The cutter head is installed on the walking wheels, the engine is installed on the cutter head, the output shaft of the engine is equipped with blades. The high-speed rotation of the blades by the engine greatly improves the speed, saves the working time of weeding workers, and reduces a large amount of human resources.
[0003] Currently, during the process of mowing grass, a lawn mower is often used. Although the existing lawn mower has basic mowing functions, during the use of the blades, since they are often exposed outside and there is no protection structure, it may cause operators to accidentally touch them, resulting in certain harm. At the same time, during the process of mowing grass, since the distance between the blades and the grass cannot be adjusted, its scope of application is greatly limited to a certain extent. Therefore, it needs to be improved. Summary of the Invention
[0004] Technical Problems to be Solved
[0005] In view of the deficiencies of the prior art, the present invention provides a lawn mower with a protection structure.
[0006] Technical Solutions
[0007] To achieve the above-mentioned solution purpose, the present invention provides the following technical solutions: A lawn mower with a protection structure includes a support frame and a mounting plate connected to the left end of the support frame, and is characterized in that: a connecting rod is provided at the top of the mounting plate, a protection plate is connected to one side of the connecting rod, a round rod is installed at the left end of the support frame, the connecting rod is movably sleeved with the round rod, a first movable plate is hinged to the right end of the connecting rod, a rectangular block is hinged to the right end of the first movable plate, and a power mechanism is connected to the right end of the rectangular block.
[0008] Further, the power mechanism includes a fixed rod, a sliding cylinder is movably installed inside the fixed rod, a pushing rod is movably installed inside the sliding cylinder, a lead screw is movably sleeved at the right end of the pushing rod, and the sliding cylinder is connected to the support frame through a fixing plate.
[0009] Further, a protective cover is installed at the top of the mounting plate, and a power motor located on the top of the support frame is installed inside the protective cover.
[0010] Further, the output shaft of the power motor penetrates through the mounting plate and extends to the bottom end of the mounting plate. A disc is connected to the output shaft of the power motor, and blade bodies are movably mounted equidistantly on the disc.
[0011] Further, the screw rod is internally threadedly sleeved with the sliding cylinder, and a cross block is arranged at the right end of the screw rod.
[0012] Further, a support plate is mounted in the middle of the fixed rod, and rollers are arranged on the support plate.
[0013] Further, a long groove is formed inside the support frame, a second movable plate is mounted inside the long groove, and a plurality of insertion rods are equidistantly mounted on the side surface of the second movable plate.
[0014] Further, a plurality of springs are mounted on the side surface of the second movable plate, and the other ends of the springs are fixedly connected to the inside of the long groove.
[0015] Further, a movable button is mounted on the upper part of the second movable plate, and one end of the movable button penetrates through the support frame and extends to the outside of the support frame.
[0016] Further, a front wheel is hinged to the left end of the mounting plate, and a torsion spring is sleeved on the hinge column of the front wheel and the mounting plate.
[0017] Beneficial Effects
[0018] Compared with the prior art, the present invention provides a lawn mower with a protection structure, which has the following
[0019] beneficial effects:
[0020] 1. For a lawn mower with a protection structure, by arranging the protection plate 12, after the blade body 5 stops working, the blade body 5 located in front of the mounting plate 2 will retract into the inside of the support frame 1 during the process of driving the protection plate 12 to move by the driving mechanism, which will eliminate potential hazards and prevent the operator from accidentally touching, thus avoiding injuries to a certain extent. Therefore, by adjusting the distances between the two protection plates 12 and the front and rear sides of the support frame 1, the blade body 5 can be completely hidden into the inside of the support frame 1. The arrangement of the protection plate 12 can not only play a certain role in shielding the blade body 5 to prevent accidental touch, but also has a certain function of preventing the cut grass from splashing when the blade body 5 is mowing the grass. As a result, the grass will not splash from both sides, but will be placed towards the rear of the whole lawn mower, which is more conducive to the operator's cleaning after the operation.
[0021] 2. A lawn mower with a protective structure. By arranging a long groove 18 inside the support frame 1, a second movable plate 24 is movably installed inside the long groove 18. A plug rod 19 is installed on the second movable plate 24. The left end of the plug rod 19 is inserted into the inside of the fixed rod 6. There is a spring 20. By pressing the movable button 22, the limitation on it can be released, so that the whole support frame 1 can move with the support of the support plate 15 and move on the fixed rod 6. During the movement, under the action of the spring 20, another plug rod 19 will be inserted into the fixed rod 6, thereby adjusting the distance between the blade body 5 and the grass. With the cooperation of the front wheels 17, the mowing movement is made more stable. Since a torsion spring 23 is arranged on the hinge column at the left end of the front wheel 17 and the support frame 1, it can cooperate with the position after the whole support frame 1 slides. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 is a schematic structural diagram of the present invention;
[0023] Figure 2 is a schematic cross-sectional structural diagram of the top of the present invention;
[0024] Figure 3 is a schematic structural diagram of the top of the present invention;
[0025] Figure 4 is a schematic cross-sectional structural diagram of the front of the present invention;
[0026] Figure 5 For the present invention Figure 2 is a partial enlarged structural diagram at position A in the present invention.
[0027] In the figure: 1, support frame; 2, mounting plate; 3, power motor; 4, disc; 5, blade body; 6, fixed rod; 7, sliding cylinder; 8, rectangular block; 9, first movable plate; 10, round rod; 11, connecting rod; 12, protective plate; 13, push rod; 14, lead screw; 15, support plate; 16, protective cover; 17, front wheel; 18, long groove; 19, plug rod; 20, spring; 21, fixing plate; 22, movable button; 23, torsion spring; 24, second movable plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] In order to more clearly illustrate the overall concept of the present invention, the following is a detailed description by way of example in conjunction with the drawings of the specification.
[0029] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation and be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.
[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.
[0031] In the present invention, unless otherwise clearly specified and limited, the terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0032] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "one solution", "some solutions", "example", "specific example" or "some examples" means that the specific feature, structure, material or characteristic described in connection with the solution or example is included in at least one solution or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same solution or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more solutions or examples.
[0033] Please refer to Figures 1 to 5 The present invention provides a lawn mower with a protection structure. In an actual use scenario, the operator first holds the convenient grip at the tail of the support frame 1 and smoothly pushes the lightweight lawn mower as a whole to the outdoor operation area. The middle position of the support frame 1 is flexibly sleeved with the fixed rod 6 through a movable kit, ensuring a stable structure while taking into account a certain angle adjustment function. At the bottom of the fixed rod 6, a wide anti-slip support plate 15 is cleverly installed, and its surface is designed with micro-convex points.
[0034] Meanwhile, to greatly improve the handling convenience and labor-saving effect during the operation of the lawn mower, an installation plate 2 made of high-strength aluminum alloy is specially fixed and assembled at the left end of the support frame 1. Inside the left end of the installation plate 2, a front wheel 17 is installed, and a set of torsion springs 23 with a high elastic coefficient are innovatively built into its axle part. When the lawn mower travels on uneven terrain, one end of the torsion spring 23 is firmly welded to the hinge rod, and the other end is firmly connected to the reinforcing rib inside the left end of the installation plate 2, forming a unique elastic support system. This ingenious design not only provides stable elastic support for the front wheel 17 in the normal traveling state, but also allows the operator to flexibly deflect the front wheel 17 within a small range of ±15° in the vertical plane by moderately applying a guiding force according to the actual terrain requirements. This user-friendly shock absorption and fine-tuning mechanism not only significantly reduces the physical consumption during long-term operation, but also enables the lawn mower to have stronger obstacle-crossing ability when facing obstacles such as stones and tree roots, comprehensively optimizing the use experience and work efficiency of outdoor operations.
[0035] Then, after the initial deployment of the lawn mower, the operator needs to start the power system: At the top of the support frame 1, a high-power waterproof and dustproof power motor 3 is fixedly installed through a bolt group. The output shaft of the power motor 3 passes through the hollow inner cavity of the support frame 1 and extends to the bottom of the installation plate 2. A disc 4 is sleeved on the outer surface of the output shaft. A blade body 5 is movably installed around the disc 4. When the power motor 3 runs, its high-speed rotating output shaft drives the disc 4 to rotate. At this time, during the rotation, since the blade body 5 and the disc 4 are designed to be movably connected, the blade body 5 will change into a diastolic mode under the action of its own gravity and inertia, and thus can mow the grass. However, during the rotation, due to the movement trajectory of the blade body 5, the blade body 5 will be exposed on the front and back sides of the installation plate 2, thus there will be a certain risk. Therefore, protective plates 12 are provided on both sides of the support frame 1. The bottom end of the protective plate 12 is slightly longer than the bottom end of the blade body 5. Therefore, the setting of the protective plate 12 can not only play a certain role in shielding the blade body 5 to prevent accidental touch, but also when the blade body 5 is performing the mowing operation, the blade body 5 will have a certain function of preventing the cut grass from splashing, so that the grass will not splash from both sides, but will be placed towards the rear of the whole lawn mower, which is more conducive to the operator's cleaning after the operation.
[0036] Inside the support frame 1, this will greatly increase potential hazards and may cause operators to accidentally touch the blade body 5 inadvertently, resulting in certain injuries. Therefore, protective plates 12 are cleverly arranged on both sides of the support frame 1, and by adjusting the distance between the two protective plates 12 and the front and rear sides of the support frame 1, the blade body 5 can be completely and safely hidden inside the support frame 1, thus effectively avoiding safety accidents that may be caused by the exposure of the blade. To achieve this function, the designer connects connecting rods 11 to the tops of the two protective plates 12, so that the connecting rods 11 can drive the protective plates 12 to move together, thereby adjusting the distance between the protective plates 12 and the support frame 1. To ensure that the movement trajectories of the two connecting rods 11 conform to the preset trajectories, the designer fixedly installs a round rod 10 at the left end of the support frame 1, and the two connecting rods 11 are sleeved on the round rod 10. At this time, the round rod 10 plays a good limiting role on the connecting rods 11, so that the connecting rods 11 can move along the predetermined trajectories, ensuring that the protective plates 12 can accurately adjust their positions, realizing effective shielding of the blade body 5, greatly improving the safety of the lawn mower in the non-working state, and providing more reliable protection for the operator.
[0037] The other end of the connecting rod 11 is hinged to the first movable plate 9 to form a movable connection structure. The other end of the first movable plate 9 is flexibly hinged to the rectangular block 8 by a hinge shaft made of high-strength alloy steel, which can achieve multi-angle deflection to adapt to different adjustment requirements. In the middle of the right end of the rectangular block 8, a push rod 13 is fixedly connected by a nut. The push rod 13 is installed through the inside of the sliding cylinder 7. The sliding cylinder 7 is movably connected to the fixed rod 6 through a universal joint, so that the sliding cylinder 7 can not only maintain a stable supporting effect, but also move flexibly with the movement of the push rod 13. The sliding cylinder 7 not only provides a stable support for the push rod 13. To ensure the precise operation of the entire adjustment mechanism, a threaded screw rod 14 is movably sleeved on the right end of the push rod 13. The right end of the screw rod 14 is fixedly installed on a cross block located on the outer surface of the right end of the sliding cylinder 7. The cross block is made of thickened aluminum alloy material, and its surface is treated by oxidation to enhance wear resistance. The screw rod 14 is precisely matched with the internal thread of the sliding cylinder 7. At the same time, the outer surface of the sliding cylinder 7 is connected to the support frame 1 through a fixed plate 21, thereby forming a firm fixed connection between the sliding cylinder 7 and the support frame 1, effectively preventing the sliding cylinder 7 from shifting during the adjustment process, and providing reliable mechanical support and precise motion control for the entire protective plate adjustment system.
[0038] As the lead screw 14 rotates, the push rod 13 gradually advances forward inside the sliding cylinder 7. The front end of the push rod 13 is firmly connected to the rectangular block 8, so the rectangular block 8 also moves forward under the drive of the push rod 13. The movement of the rectangular block 8 is transmitted to the first movable plate 9 through the hinge structure, causing the two first movable plates 9 to adjust the angle around the hinge point. The movement of the first movable plate 9 further drives the connecting rod 11 to slide on the round rod 10, and since the movement trajectory of the connecting rod 11 is limited by the round rod 10, the two connecting rods 11 start to move away from each other. Driven by the connecting rod 11, the two protective plates 12 gradually move away from the front and back sides of the mounting plate 2, so that there is enough space for the blade body 5 to perform mowing operations during rotation without being interfered by the protective plates 12.
[0039] After the mowing operation is completed, the operator rotates the cross block again, but the rotation direction is opposite to that before. The reversely rotating lead screw 14 drives the push rod 13 to retract backward inside the sliding cylinder 7, and the rectangular block 8 also moves backward accordingly. The backward movement of the rectangular block 8 causes the first movable plate 9 to adjust the angle in the reverse direction, thereby driving the connecting rod 11 to move toward each other on the round rod 10. As the connecting rods 11 move toward each other, the two protective plates 12 gradually approach. The bottom end of the protective plate 12 is designed to be slightly longer than the blade body 5, so during the movement of the protective plate 12, they completely wrap and hide the blade body 5 inside the bottom end of the support frame 1. At the same time, the two protective plates 12 not only play a role in safety protection, but also effectively shield the area below the support frame 1, preventing the operator from accidentally touching the blade body 5 due to the lack of shielding below, thus significantly improving the safety of the lawn mower in the non-working state and providing comprehensive protection for the operator.
[0040] At this time, the operator rotates the transverse block, driving the lead screw 14 fixedly connected to the transverse block to perform a rotational motion. The lead screw 14 meshes precisely with the internal thread of the sliding cylinder 7. During the operation of the lawn mower, in order to adapt to different grass heights, the operator needs to accurately adjust the height difference between the blade body 5 and the grass on the ground. At this time, the long groove 18 ingeniously arranged inside the support frame 1 becomes a key structure. A second movable plate 24 is movably installed in the long groove 18, and a number of insertion rods 19 are equidistantly installed on it. The left ends of these insertion rods 19 can be inserted into the preset hole positions of the fixed rod 6 to fix the relative positions of the support frame 1 and the fixed rod 6. At the same time, a plurality of springs 20 are evenly distributed on the other side of the second movable plate 24. One end of the spring 20 is firmly connected to the second movable plate 24, and the other end is fixed to the inner wall of the long groove 18, providing elastic support for the expansion and contraction of the insertion rods 19. When the blade height needs to be adjusted, the operator only needs to press the movable button 22 on the outside of the support frame 1. This button is connected to the insertion rod 19. After pressing, the insertion rod 19 withdraws from the hole position of the fixed rod 6, releasing the fixation of the support frame 1. At this time, the operator can push the entire support frame 1 with the support plate 15 as the fulcrum and longitudinally move on the fixed rod 6. During the movement, the spring 20 monitors the position change in real time. Once the support frame 1 reaches the target position, the insertion rod 19 automatically inserts into the corresponding new hole position of the fixed rod 6 under the elastic force of the spring 20 to complete the fixation and adjust the height difference between the blade body 5 and the grass. The front wheel 17 plays an important role in this process. It is hinged to the left end hinge column of the support frame 1, and the torsion spring 23 installed on the column can make the front wheel 17 automatically adjust the angle according to the new position of the support frame 1 to ensure the overall stability of the lawn mower.
[0041] A protective cover 16 is carefully designed at the top of the mounting plate 2. The protective cover 16 is made of engineering plastics with strong weather resistance, formed by a special process, with a smooth surface and a streamlined design. It can effectively resist the impact of grass clippings and small stones, providing an all-round protection barrier for the internal core components such as the power motor 3 and the transmission disc 4, preventing the erosion of the external environment and physical damage. The protective cover 16 is not completely enclosed, but is designed with a number of optimized ventilation and heat dissipation holes. These hole positions are reasonably arranged, which can not only prevent foreign objects from entering, but also effectively guide the air flow, providing continuous heat dissipation for the moving parts, ensuring that the internal temperature of the lawn mower is within a safe range during long-term operation, and avoiding the performance degradation of components caused by overheating.
[0042] In addition, a specially designed baffle is firmly connected to the right bottom end of the mounting plate 2. The baffle is made of rubber material with high strength and high flexibility, and has good wear resistance and impact resistance. When the lawn mower is operating, the grass clippings generated by the blade body 5 cutting the grass fly, and the baffle can effectively block these grass clippings, preventing them from entering the inside of the lawn mower, avoiding the entanglement of mechanical components by grass clippings or the blockage of ventilation and heat dissipation channels, thereby ensuring the cleanliness and stable operation of the internal structure of the lawn mower, extending the service life of the lawn mower, and guaranteeing the operation efficiency and safety.
[0043] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A lawn mower with a protective structure, comprising a support frame (1) and a mounting plate (2) connected to the left end of the support frame (1), characterized in that: A connecting rod (11) is provided at the top of the mounting plate (2). A protective plate (12) is connected to one side of the connecting rod (11). A round rod (10) is installed at the left end of the support frame (1). The connecting rod (11) is movably sleeved with the round rod (10). The right end of the connecting rod (11) is hinged to a first movable plate (9). The right end of the first movable plate (9) is hinged to a rectangular block (8). A power mechanism is connected to the right end of the rectangular block (8).
2. The lawn mower with a protection structure according to claim 1, characterized in that: The power mechanism includes a fixed rod (6). A sliding cylinder (7) is movably installed inside the fixed rod (6). A push rod (13) is movably installed inside the sliding cylinder (7). The right end of the push rod (13) is movably sleeved with a lead screw (14). The sliding cylinder (7) is connected to the support frame (1) through a fixing plate (21).
3. A lawn mower with a protective structure according to claim 1, characterized in that: A protective cover (16) is installed at the top of the mounting plate (2). A power motor (3) located on the top of the support frame (1) is installed inside the protective cover (16).
4. The lawn mower with a protection structure according to claim 3, wherein: The output shaft of the power motor (3) penetrates through the mounting plate (2) and extends to the bottom of the mounting plate (2). The output shaft of the power motor (3) is connected to a disc (4). Blade bodies (5) are equidistantly and movably installed on the disc (4).
5. A lawn mower with a protective structure according to claim 2, characterized in that: The lead screw (14) is threadedly sleeved inside the sliding cylinder (7). A cross block is provided at the right end of the lead screw (14).
6. The lawn mower with a protection structure according to claim 2, wherein: A support plate (15) is installed in the middle of the fixed rod (6). Rollers are provided on the support plate (15).
7. A lawn mower with a protective structure according to claim 1, characterized in that: A long groove (18) is formed inside the support frame (1). A second movable plate (24) is installed inside the long groove (18). A plurality of insertion rods (19) are equidistantly installed on the side surface of the second movable plate (24).
8. A lawn mower with a protection structure according to claim 7, characterized in that: A plurality of springs (20) are installed on the side surface of the second movable plate (24). The other ends of the springs (20) are fixedly connected to the inside of the long groove (18).
9. The lawn mower with a protective structure according to claim 7, characterized in that: An activity button (22) is installed on the upper part of the second movable plate (24). One end of the activity button (22) penetrates through the support frame (1) and extends to the outside of the support frame (1).
10. A lawn mower with a protection structure according to claim 1, characterized in that: A front wheel (17) is hinged to the left end of the mounting plate (2). A torsion spring (23) is sleeved on the hinge column of the front wheel (17) and the mounting plate (2).