Protective structure of mowing machine head

Abstract

The utility model relates to the technical field of mowers, in particular to a protective structure of a mowing machine head, which comprises a machine head and a rotary blade mounted below the machine head, a driving device is arranged in the machine head and connected with the rotary blade, a protective cover is further arranged on the machine head, and the protective cover is connected with the rotary blade. The protective cover comprises an upper protective part arranged above the rotary blade and a side protective part arranged on one side of the rotary blade, a lower protective part is arranged at the lower end of the side protective part in the direction towards the center of the rotary blade, and the upper protective part, the side protective part and the lower protective part form a protective space. The rotary blade part is wrapped in the protection space, and the protection structure is simple in structure, installed on the mower head, more comprehensive in protection and capable of preventing cut grass from splashing towards the direction of a human body.

Description

Technical Field

[0001] This utility model belongs to the field of lawnmower technology, and specifically refers to a protective structure for a lawnmower head. Background Technology

[0002] A lawnmower, also known as a lawn mower, lawn trimmer, or lawn mower, is a mechanical tool used to trim lawns and vegetation. It works by using a motor inside the mower head to drive blades, which in turn trim the grass. However, due to the high-speed rotation of the blades, cut grass flies in all directions during the mowing process. To prevent accidents caused by flying grass, modern lawnmowers have added a protective cover to the mower head. However, this cover is not comprehensive enough, as the high-speed rotating blades can easily pick up and cut grass along with the blades, as illustrated by Chinese patent CN202322475842.X. Figure 2 As shown, the 10-point stop is a protective cover. During the mowing process, even with this protective cover, broken grass can still pass through the bottom of the cover and hit the person's body. Therefore, there is a need for a protective structure that can be installed on the mower head to provide more comprehensive protection and prevent cut grass from flying towards the person. Summary of the Invention

[0003] The purpose of this invention is to provide a simple structure that can be installed on the head of a lawnmower, providing more comprehensive protection and preventing cut grass from flying towards the human body.

[0004] The purpose of this utility model is achieved as follows:

[0005] A protective structure for a lawnmower head includes a head and a rotating blade mounted below the head. The head contains a drive unit connected to the rotating blade. The head also has a protective cover, which includes an upper protective portion above the rotating blade and a side protective portion on one side of the rotating blade. The lower end of the side protective portion has a lower protective portion facing the center of the rotating blade. The upper protective portion, the side protective portion, and the lower protective portion form a protective space. When the rotating blade is mounted below the head, the rotating blade is partially enclosed within the protective space.

[0006] Furthermore, the lower end of the side protection part is provided with several mounting parts, each mounting part having a threaded hole formed therein. The lower protection part has mounting holes adapted to the mounting parts, and mounting screws are provided in the mounting holes. The lower protection part and the side protection part are fixedly connected by mounting screws. The lower protection part is a lower protective cover plate.

[0007] Furthermore, the lower protective part is a semi-circular plate.

[0008] Furthermore, the driving device includes a drive motor, a transmission gear set, and an output shaft. The transmission gear set includes a driving gear and a driven gear meshing with the driving gear. The drive motor is provided with a motor shaft, which is connected to the driving gear, and the driven gear is connected to the output shaft.

[0009] Furthermore, the motor shaft is also provided with a fan impeller, and the fan impeller is provided with a number of blades, which are arranged in an arc shape.

[0010] Furthermore, the machine head is also provided with an air inlet and an air outlet, with the air inlet located above the air outlet and the air outlet located on one side of the impeller.

[0011] Furthermore, the machine head is also equipped with a motor bracket, the drive motor is located inside the motor bracket, the machine head is equipped with a partition plate, the partition plate separates the air inlet and the air outlet, and an installation space is opened in the center of the partition plate, the motor bracket is installed in the installation space and fits against the partition plate.

[0012] Furthermore, the upper protective part is also provided with a mounting base, and the mounting base is provided with a trimming wheel assembly. The trimming wheel assembly includes a connecting part connected to the mounting base and a pulley. When the machine head is at a perpendicular angle to the ground, the height of the pulley is lower than the height of the rotating blade.

[0013] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0014] This utility model is a protective structure for lawnmowers, offering more comprehensive protection compared to previous protective covers. Previous covers, besides covering the horizontal portion of the blades, also included vertical protection. However, due to the design of lawnmowers, the vertical protection couldn't be too long; otherwise, during horizontal cutting, the vertical portion would prematurely touch the ground, preventing the grass from being cut short. Therefore, the vertical protection was limited to a certain distance. With this design, after the high-speed rotating blades cut the weeds, some grass would still be flung out, potentially hitting the user. This utility model, by extending the lower end of the protective cover towards the rotating blades, with the blades mounted below the machine head, covers the blade's cutting edge. When the cut grass is flung out, it only falls onto the upper surface of the lower protective section, preventing it from flying out of the cover. This provides more comprehensive protection in both direction and angle compared to previous designs. Furthermore, this utility model's protective cover doesn't require manual adjustment of the protection range and doesn't affect the distance between the blades and the ground. Attached Figure Description

[0015] Figure 1 This is one of the perspective views of this utility model.

[0016] Figure 2This is the second perspective view of this utility model.

[0017] Figure 3 This is an internal schematic diagram of the present invention with part of the machine head removed.

[0018] Figure 4 This is an exploded view of the protective cover and lower protective part of this utility model.

[0019] Figure 5 This is a perspective view of the protective cover and lower protective part of this utility model.

[0020] Figure 6 This is a schematic diagram of the machine head and protective cover of this utility model.

[0021] Figure 7 This is an exploded view of the driving device of this utility model.

[0022] Figure 8 This is a reference diagram showing the usage state of this utility model.

[0023] The meaning of the labels in the diagram:

[0024] 1-Head; 2-Rotating blade; 3-Drive unit; 4-Side protection section; 5-Lower protection section; 6-Protective space; 7-Mounting section; 8-Threaded hole; 9-Mounting hole; 10-Mounting screw; 11-Drive motor; 12-Transmission gear set; 13-Output shaft; 14-Driving wheel; 15-Driven wheel; 16-Motor shaft; 17-Impeller; 18-Blade; 19-Air inlet; 20-Air outlet; 21-Motor bracket; 22-Divider plate; 23-Mounting base; 24-Trimming wheel set; 25-Connecting part; 26-Pulley; 27-Protective cover; 28-Upper protection section. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments:

[0026] A protective structure for a lawnmower head includes a head 1 and a rotating blade 2 installed below the head 1. The head 1 is equipped with a drive device 3, which is connected to the rotating blade 2. The head 1 is also equipped with a protective cover 27. The protective cover 27 includes an upper protective part 28 located above the rotating blade 2 and a side protective part 4 located on one side of the rotating blade 2. The lower end of the side protective part 4 is provided with a lower protective part 5 facing the center of the rotating blade 2. The upper protective part 28, the side protective part 4, and the lower protective part 5 form a protective space 6. When the rotating blade 2 is installed below the head 1, the rotating blade 2 is partially enclosed within the protective space 6.

[0027] This utility model relates to a protective structure for a lawnmower, offering more comprehensive protection compared to the previous protective cover 27. The previous cover 27, besides covering the horizontal portion of the blade, also provided vertical protection. However, due to the lawnmower's design, the vertical protection could not be too long; otherwise, during horizontal cutting, the vertical portion would prematurely touch the ground, preventing the grass from being cut short. Therefore, the vertical protection was limited to a certain distance. Furthermore, even after the high-speed rotating blades cut the weeds, some grass would still be flung away with the blades' speed, resulting in some... Grass would fly out of the vertical protection section and hit a person's body. However, this utility model extends the lower end of the protective cover 27 towards the rotating blade 2. After the rotating blade 2 is installed below the machine head 1, the protective cover 27 covers the blade edge. When the cut grass is flung away, it will only fall onto the upper surface of the lower protection section 5. The grass cannot fly out from inside the protective cover 27. Compared with the previous method, the protection direction and angle are more comprehensive. In addition, the protective cover 27 of this utility model does not require manual adjustment of the protection range and does not affect the distance between the blade and the ground.

[0028] Preferably, the lower end of the side protection part 4 is further provided with a plurality of mounting parts 7, the mounting parts 7 having threaded holes 8 formed therein, and the lower protection part 5 having mounting holes 9 adapted to the mounting parts 7, the mounting holes 9 having mounting screws 10 therein, the lower protection part 5 and the side protection part 4 being fixedly connected by mounting screws 10, the lower protection part 5 being a lower protective cover plate. This utility model sets the protective cover 27 as a split type, which is convenient for disassembly and replacement, and is more convenient to install than the integrated protective cover 27. After the user installs the rotating blade 2 under the machine head 1, he only needs to cover the lower protection part 5 under the side protection part 4 and then fix it with a screwdriver using the mounting screws 10. The installation time is not limited by the size of the lower protection part 5.

[0029] Preferably, the lower protective part 5 is a semi-circular plate, which reduces the obstruction of the rotating blade 2, facilitates the installation process when the user connects the rotating blade 2 to the output shaft 13, and allows the grass to fall naturally downwards after being cut, preventing excessive grass from tangling in the protective space 6.

[0030] Preferably, the driving device 3 includes a drive motor 11, a transmission gear set 12, and an output shaft 13. The transmission gear set 12 includes a driving wheel 14 and a driven wheel 15 meshing with the driving wheel 14. The drive motor 11 is provided with a motor shaft 16, which is connected to the driving wheel 14, and the driven wheel 15 is connected to the output shaft 13. In this invention, the driving device 3 drives the rotating blade 2 to rotate. The driving device 3 includes a drive motor 11, a transmission gear set 12, and an output shaft 13. The transmission gear set 12 is divided into a driving wheel 14 and a driven wheel 15, which makes the driving process more stable and reduces wear. When the drive motor 11 drives the driving wheel 14 to rotate through the motor shaft 16, the driven wheel 15 rotates synchronously and drives the rotating blade 2 to rotate and cut the grass.

[0031] Preferably, the motor shaft 16 is also provided with a fan impeller 17, and the fan impeller 17 is provided with a plurality of blades 18. The blades 18 are arranged in an arc shape. The head 1 is also provided with an air inlet 19 and an air outlet 20 respectively. The air inlet 19 is located above the air outlet 20, and the air outlet 20 is located on one side of the fan impeller 17. In order to prevent the drive motor 11 from working for a long time after starting for a long time and working in the narrow head 1, the fan impeller 17 is added. In addition, the blades 18 of the fan impeller 17 were all straight blades 18. In this utility model, the blades 18 are set to be arc-shaped, so that they can generate greater wind force during rotation. The faster the rotation speed, the greater the wind force.

[0032] Preferably, the head unit 1 is further provided with a motor bracket 21, and the drive motor 11 is located inside the motor bracket 21. The head unit 1 is provided with a partition plate 22, which separates the air inlet 19 and the air outlet 20. An installation space is opened in the center of the partition plate 22. The motor bracket 21 is installed in the installation space and fits against the partition plate 22, providing a mounting position for the drive motor 11. The fit prevents the air entering from the air inlet 19 from scattering. When the air enters from the air inlet 19, it can only pass through the drive motor 11 and go downwards, so that the position of the drive motor 11 will not always maintain a high temperature. The fan impeller 17 at the lower end rotates and then discharges the high-temperature air from the side air outlet 20, thereby increasing the working efficiency of the lawnmower.

[0033] Preferably, the upper protective part 28 is also provided with a mounting base 23, and the mounting base 23 is provided with a trimming wheel assembly 24. The trimming wheel assembly 24 includes a connecting part 25 connected to the mounting base 23 and a pulley 26. When the machine head 1 is at a perpendicular angle to the ground, the height of the pulley 26 is lower than the height of the rotating blade 2. This utility model can not only cut grass horizontally, but also trim grass and other places laterally. When trimming a short edge, it prevents the blade from being suspended in the air. The added trimming wheel can move forward along the ground. The bottom of the pulley 26 is lower than the rotating blade 2. Therefore, when trimming laterally, the pulley 26 will touch the ground first, ensuring that the rotating blade 2 will not touch the ground and avoid damage to the ground. It also protects the blade edge. The machine head 1 of this utility model is also provided with a connecting rod connected to the lawnmower handle.

[0034] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A protective structure for a lawnmower head, comprising a head (1) and a rotating blade (2) mounted below the head (1), wherein a drive device (3) is provided inside the head (1), and the drive device (3) is connected to the rotating blade (2), characterized in that, The machine head (1) is also provided with a protective cover (27). The protective cover (27) includes an upper protective part (28) above the rotating blade (2) and a side protective part (4) on one side of the rotating blade (2). The lower end of the side protective part (4) is provided with a lower protective part (5) facing the center of the rotating blade (2). The upper protective part (28), the side protective part (4) and the lower protective part (5) form a protective space (6). When the rotating blade (2) is installed below the machine head (1), the rotating blade (2) is partially wrapped in the protective space (6).

2. The protective structure for a lawnmower head according to claim 1, characterized in that: The lower end of the side protection part (4) is also provided with several mounting parts (7), and the mounting parts (7) are formed with threaded holes (8). The lower protection part (5) is provided with mounting holes (9) that are compatible with the mounting parts (7). The mounting holes (9) are provided with mounting screws (10). The lower protection part (5) and the side protection part (4) are fixedly connected by mounting screws (10). The lower protection part (5) is a lower protective cover plate.

3. The protective structure for a lawnmower head according to claim 2, characterized in that: The lower protective part (5) is a semi-circular plate.

4. A protective structure for a lawnmower head according to claim 1 or 2, characterized in that: The drive device (3) includes a drive motor (11), a transmission gear set (12), and an output shaft (13). The transmission gear set (12) includes a drive gear (14) and a driven gear (15) meshing with the drive gear (14). The drive motor (11) is provided with a motor shaft (16), which is connected to the drive gear (14), and the driven gear (15) is connected to the output shaft (13).

5. The protective structure for a lawnmower head according to claim 4, characterized in that: The motor shaft (16) is also provided with a fan impeller (17), and the fan impeller (17) is provided with a number of blades (18), which are arranged in an arc shape.

6. The protective structure for a lawnmower head according to claim 5, characterized in that: The machine head (1) is also provided with an air inlet (19) and an air outlet (20), with the air inlet (19) located above the air outlet (20) and the air outlet (20) located on one side of the impeller (17).

7. The protective structure for a lawnmower head according to claim 6, characterized in that: The machine head (1) is also provided with a motor bracket (21), the drive motor (11) is located in the motor bracket (21), the machine head (1) is provided with a partition plate (22), the partition plate (22) separates the air inlet (19) and the air outlet (20), an installation space is opened in the center of the partition plate (22), the motor bracket (21) is installed in the installation space and fits against the partition plate (22).

8. The protective structure for a lawnmower head according to claim 1, characterized in that: The upper protective part (28) is also provided with a mounting base (23), and the mounting base (23) is provided with a trimming wheel assembly (24). The trimming wheel assembly (24) includes a connecting part (25) connected to the mounting base (23) and a pulley (26). When the machine head (1) is perpendicular to the ground, the height of the pulley (26) is lower than the height of the rotating blade (2).

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