A grass trimmer

Abstract

The utility model relates to the technical field of garden tools, and disclose a grass beater, including protective housing, the inside rotation of protective housing is provided with grass beater blade, the bottom of protective housing is equipped with walking wheel through the axle, the mobile front end of protective housing is integrally formed with the projection of edge smooth processing. This grass beater, through setting up the integrally formed projection of edge smooth processing in the mobile front end of protective housing, forms the structure that initiative protection and flow guide combine, and the projection can contact and push away hard impurities such as stone and branch in advance when the grass beater advances, reduces its direct collision with grass beater blade, reduces the risk of blade crack, and the smooth edge can guide the grass clippings to the two sides, reduce the splashing range, avoid the injury to the operator, compared with the traditional plane protection structure, this design not only enhances the protection effect of the tool bit, but also improves the operation safety, especially suitable for the complex lawn environment of many sundries.

Description

Technical Field

[0001] This utility model relates to the field of garden tool technology, specifically a lawn mower. Background Technology

[0002] As a common garden tool, lawn mowers play an irreplaceable role in lawn maintenance due to their efficient cutting capabilities and flexible operation.

[0003] The existing patent document CN217389422U discloses a grass trimming height adjustment structure for a grass trimmer. This utility model realizes the height adjustment of the grass trimming rope through the adjustment hole of the fixed frame, the mounting column on the mounting base and the fastener. At the same time, the fixed shaft and the plug hole make the fixed plate more stably fixed on the power output shaft, further improving the stability of the grass trimmer height adjustment structure.

[0004] However, existing lawn mowers are not convenient for actively handling hard debris during operation. The existing protective structures of lawn mowers are mostly flat designs, which can only passively block some debris and cannot push away stones, branches, etc. in advance. As a result, the debris is easy to collide directly with the mowing blades, increasing the risk of blade breakage. At the same time, the edges of traditional protective structures lack rounded treatment, and the grass clippings are scattered over a large area, which can easily cause accidental injury to the operator. The safety of operating in complex lawn environments with many debris is not good. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a grass cutter to solve the problem mentioned in the background art that existing grass cutters are not convenient for actively handling hard impurities during the process.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a grass cutter, including a protective shell, grass cutting blades are rotatably arranged inside the protective shell, a walking wheel is mounted on the bottom of the protective shell via a wheel axle, and a raised part with rounded edges is integrally formed at the moving front end of the protective shell.

[0009] As a further improvement to the above solution, a support column is vertically welded to the middle of the upper surface of the protective shell, and an adjustment motor is installed at the top of the support column.

[0010] As a further improvement to the above solution, an adjusting screw is fixedly connected to the transmission end of the bottom of the adjusting motor, and the end of the adjusting screw away from the adjusting motor is connected to the bottom inner wall of the support column through a bearing.

[0011] As a further improvement to the above solution, the outer surface of the adjusting screw is connected to a gantry-shaped lifting plate by a thread. The horizontal section of the gantry-shaped lifting plate slides against the inner wall of the supporting column on both sides, and the bottom end of its vertical section slides through the top wall of the protective shell and is connected to a horizontally set support plate.

[0012] As a further improvement to the above solution, a grass-cutting motor is installed in the middle of the upper surface of the support plate, and the transmission end of the grass-cutting motor passes through the support plate and is fixed to the center of the grass-cutting blade.

[0013] As a further improvement to the above solution, a protective cover is provided on the upper surface of the protective shell outside the supporting column, and an upwardly inclined handrail is fixed to the rear end of the protective shell by welding, and a handle with anti-slip texture is horizontally provided on the top of the handrail.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This lawn mower features an integrated, rounded-edge protrusion at the front of its protective shell, creating a structure that combines active protection with flow guidance. As the mower moves, the protrusion proactively contacts and pushes away hard debris such as stones and branches, reducing direct collisions with the mowing blades and lowering the risk of blade breakage. Simultaneously, the rounded edges guide the grass clippings to the sides, reducing the splash range and preventing accidental injury to operators. Compared to traditional flat protective structures, this design enhances blade protection and improves operational safety, making it particularly suitable for complex lawn environments with numerous obstacles.

[0016] 2. This lawn mower uses a motor to drive the adjusting screw to rotate, which, together with the sliding guide between the gantry lifting plate and the support column, forms an electric height adjustment system. During adjustment, simply operate the handle button to adjust the motor, which will drive the screw to rotate in both directions, allowing the gantry lifting plate to rise and fall smoothly along the support column. This, in turn, drives the mowing blades to precisely change height. Compared to the traditional manual bolt adjustment method, this eliminates the need for tool disassembly and assembly, making the adjustment process more convenient and labor-saving. Furthermore, the screw transmission ensures the accuracy of height control, allowing it to quickly adapt to different lawn mowing height requirements.

[0017] 3. This grass cutter, through the rigid connection between the gantry-shaped lifting plate and the support plate, ensures that the grass-cutting blades remain horizontal during the lifting process, avoiding uneven cutting caused by tilting. The protective cover on the outside of the support column effectively prevents grass clippings and dust from entering the adjustment mechanism, extending the service life of components such as the lead screw and motor. The upward-sloping handrail and the anti-slip handle are ergonomically designed to improve grip comfort and reduce fatigue during long-term operation. The overall structure is compact and coordinated, taking into account both functionality and practicality. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the protective shell of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the support plate of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the grass-cutting blade of this utility model.

[0022] In the diagram: 1. Protective shell; 2. Grass trimmer blade; 3. Walking wheel; 4. Protrusion; 5. Support column; 6. Adjusting motor; 7. Adjusting screw; 8. Gate-shaped lifting plate; 9. Support plate; 10. Grass trimmer motor; 11. Protective cover; 12. Handrail; 13. Handle. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a grass cutter, including a protective shell 1, grass cutting blades 2 are rotatably arranged inside the protective shell 1, a walking wheel 3 is installed at the bottom of the protective shell 1 through a wheel axle, and a protrusion 4 with rounded edges is integrally formed at the moving front end of the protective shell 1.

[0025] The bottom wheels 3 roll along the ground, driving the protective shell 1 to move smoothly. At this time, the rounded protrusion 4 at the front of the protective shell 1 will move with the whole machine. Its arc-shaped contour will contact the debris on the ground before the grass cutting blades 2. With the push of the protrusion, hard debris such as stones and branches will be pushed to the sides to avoid directly entering the interior of the protective shell 1 and colliding with the high-speed rotating grass cutting blades 2. At the same time, the rounded edge can also guide the grass clippings to the side and rear to reduce the possibility of splashing onto the operator.

[0026] A support column 5 is vertically welded to the middle of the upper surface of the protective shell 1. An adjusting motor 6 is installed at the top inside the support column 5. An adjusting screw 7 is fixedly connected to the transmission end of the bottom of the adjusting motor 6. The end of the adjusting screw 7 away from the adjusting motor 6 is connected to the bottom inner wall of the support column 5 through a bearing. A portal-shaped lifting plate 8 is threadedly connected to the outer surface of the adjusting screw 7. The horizontal section of the portal-shaped lifting plate 8 slides against the inner wall of the support column 5 on both sides. The bottom end of its vertical section slides through the top wall of the protective shell 1 and is connected to a horizontally set support plate 9. A grass trimming motor 10 is installed in the middle of the upper surface of the support plate 9. The transmission end of the grass trimming motor 10 passes through the support plate 9 and is fixed to the center of the grass trimming blade 2. A protective cover 11 is provided on the upper surface of the protective shell 1 outside the support column 5. An upwardly inclined handrail 12 is fixed to the rear end of the protective shell 1 by welding. A handle 13 with anti-slip texture is horizontally set at the top of the handrail 12.

[0027] During operation, the operator holds the handle 13 with anti-slip texture on the top of the handrail 12 and pushes the machine forward. After starting the lawn mowing motor 10, the motor's output shaft drives the lawn mowing blades 2 to rotate at high speed inside the protective shell 1, typically at 3000-5000 revolutions per minute. The centrifugal force generated by the rotating blades sucks the grass stems into the cutting range, completing the lawn mowing. The protective shell 1 and the protrusion 4 form a semi-enclosed space, further preventing grass clippings from flying and making the operation safer. If it is necessary to adjust the cutting height according to the lawn length, the operator can press the control button on the surface of the handle 13 to start the adjusting motor 6 in the support column 5. The output shaft of the adjusting motor 6 drives the adjusting screw 7 to rotate forward or backward. Because the horizontal section of the gantry lifting plate 8 slides against the inner wall of the support column 5, The axial force generated by the threaded drive will drive the gantry lifting plate 8 to rise and fall smoothly in the vertical direction. The vertical section of the gantry lifting plate 8 passes through the guide hole on the top wall of the protective shell 1, which will synchronously drive the support plate 9 and the mowing motor 10 below to move up and down. In this way, the height of the mowing blade 2 off the ground can be precisely adjusted between 30-150 mm. During the adjustment process, the protective cover 11 on the outside of the support column 5 can effectively block grass clippings and dust, preventing them from entering the internal transmission structure and avoiding the adjustment screw 7 and the threaded pair of the gantry lifting plate 8 from being stuck due to impurities and unable to work. When the blade height reaches the required value, the adjustment motor 6 is turned off. The self-locking characteristics of the screw and thread will fix the blade position, and the operator can continue to push the whole machine to carry out continuous mowing operations until the lawn in the target area is mowed.

[0028] Working Principle: During operation, the operator holds the handle 13 with anti-slip texture at the top of the handrail 12 and pushes the machine forward. The bottom wheels 3 roll along the ground, driving the protective shell 1 to move smoothly. At this time, the rounded protrusion 4 at the front of the protective shell 1 moves with the machine. Its arc-shaped contour will contact the debris on the ground before the grass-cutting blades 2. With the pushing force of the protrusion, hard debris such as stones and branches will be pushed to the sides, preventing them from directly entering the protective shell 1 and colliding with the high-speed rotating grass-cutting blades 2. At the same time, the rounded edge can also guide the grass clippings to the side and rear, reducing the possibility of splashing onto the operator. After starting the grass-cutting motor 10, the output shaft of the motor drives the grass-cutting blades 2 to rotate at high speed inside the protective shell 1, generally at 3000-5000 revolutions per minute. The centrifugal force generated by the rotation of the blades will suck the grass stems into the cutting range, completing the lawn mowing. The protective shell 1 and the protrusion 4 form a semi-enclosed closed space, which can further prevent grass clippings from splashing, making the operation safer. If necessary, adjust according to the length of the lawn. To adjust the cutting height, the operator can press the control button on the surface of the handle 13 to start the adjusting motor 6 inside the support column 5. The output shaft of the adjusting motor 6 drives the adjusting screw 7 to rotate forward or backward. Since the horizontal section of the gantry lifting plate 8 slides against the inner wall of the support column 5, the axial force generated by the threaded transmission will drive the gantry lifting plate 8 to rise and fall smoothly in the vertical direction. The vertical section of the gantry lifting plate 8 passes through the guide hole on the top wall of the protective shell 1, which will synchronously drive the support plate 9 and the grass-cutting motor 10 below to move up and down. In this way, the height of the grass-cutting blade 2 off the ground can be precisely adjusted between 30-150 mm. During the adjustment process, the protective cover 11 on the outside of the support column 5 can effectively block grass clippings and dust, preventing them from entering the internal transmission structure and avoiding the threaded pair of the adjusting screw 7 and the gantry lifting plate 8 from being stuck due to impurities. When the blade height reaches the required value, the adjusting motor 6 is turned off. The self-locking characteristics of the screw and thread will fix the blade position, and the operator can continue to push the whole machine to carry out continuous grass-cutting operations until the lawn in the target area is mowed.

[0029] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A lawn mower, comprising a protective outer shell (1), characterized in that: The protective shell (1) is equipped with a grass-cutting blade (2) for rotation. The bottom of the protective shell (1) is equipped with a walking wheel (3) via an axle. The moving front end of the protective shell (1) is integrally formed with a protrusion (4) with rounded edges.

2. A lawn mower according to claim 1, characterized in that: A support column (5) is vertically welded to the middle of the upper surface of the protective shell (1), and an adjustment motor (6) is installed at the top inside the support column (5).

3. A lawn mower according to claim 2, characterized in that: An adjusting screw (7) is fixedly connected to the transmission end of the bottom of the adjusting motor (6). The end of the adjusting screw (7) away from the adjusting motor (6) is connected to the bottom inner wall of the support column (5) through a bearing.

4. A lawn mower according to claim 3, characterized in that: The outer surface of the adjusting screw (7) is connected to a gantry lifting plate (8) by a thread. The horizontal section of the gantry lifting plate (8) slides against the inner wall of the support column (5) on both sides. The bottom end of its vertical section slides through the top wall of the protective shell (1) and is connected to a horizontally set support plate (9).

5. A lawn mower according to claim 4, characterized in that: A grass-cutting motor (10) is installed in the middle of the upper surface of the support plate (9). The transmission end of the grass-cutting motor (10) passes through the support plate (9) and is fixed to the center of the grass-cutting blade (2).

6. A lawn mower according to claim 2, characterized in that: The upper surface of the protective shell (1) is covered with a protective cover (11) on the outside of the supporting column (5). The rear end of the protective shell (1) is fixed with an upwardly inclined handrail (12) by welding. The top of the handrail (12) is horizontally provided with a handle (13) with anti-slip texture.

Images