Rotary cutter type mower with adjustable cutting blade protective cover
By designing an adjustable cutting blade guard, the problems of obstruction and grass deformation caused by the guard on rotary lawnmowers have been solved, resulting in more efficient grass cutting and convenient maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-04-03
AI Technical Summary
The protective cover on existing rotary lawnmowers can obstruct the cutting blades, affecting cutting efficiency and causing the grass to deform due to compression.
An adjustable cutting blade guard was designed, including a protective shell, a mounting ring, an inner toothed ring, and a protective plate. The mounting ring is driven to rotate by a motor. The protective plate provides reverse support when cutting grass. The height of the protective plate is adjustable to adapt to different grass heights. The protective shell is removable for easy cleaning.
It improves cutting efficiency, reduces grass deformation, enhances the ability to remove debris, and facilitates the cleaning and maintenance of the protective shell and blades.
Smart Images
Figure CN224069232U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of rotary blade lawnmowers, and in particular to a rotary blade lawnmower with an adjustable cutting blade guard. Background Technology
[0002] Rotary blade lawnmowers are a common type of lawn mowing equipment. The core component of a rotary blade lawnmower is a high-speed rotating blade mounted on a vertical axis. The blade rotates at high speed in the horizontal plane and cuts the grass stems by colliding with the blades. Nowadays, rotary blade lawnmowers use protective covers to prevent grass from splashing onto the mower. However, the protective covers can obstruct some of the cutting blades, compress the grass, deform it, and affect the cutting of the grass. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a rotary blade mower with an adjustable cutting blade guard, so as to solve the problem that the guard of the prior art will block part of the cutting blade, squeeze the grass and deform it, thus affecting the cutting of the grass.
[0004] In view of this, the present invention provides a rotary lawnmower with an adjustable cutting blade guard, including a housing, on which a protective mechanism is provided; the protective mechanism includes a protective shell, a mounting ring, an inner toothed ring, and several protective plates, the protective shell is installed on the outer wall of the housing, the mounting ring is rotatably installed on the inner wall of the protective shell, the inner toothed ring is fixedly installed on the inner wall of the mounting ring, and several protective plates are fixedly installed on the top of the mounting ring by bolts, with one end of each protective plate extending to the outside of the outer wall of the mounting ring.
[0005] Optionally, the protective plate is T-shaped.
[0006] Optionally, a second motor is fixedly installed at the top of the protective shell, the output end of the second motor extends to the bottom of the protective shell, and a spur gear is fixedly installed at the output end of the second motor.
[0007] Optionally, the spur gear meshes with the inner ring of the internal gear ring.
[0008] Optionally, a plurality of threaded posts are fixedly installed at the bottom of the outer wall of the outer shell, and an internal threaded cylinder is threadedly connected to the outer wall of the threaded posts. A plurality of mounting ports are opened at the top of the protective shell, and the protective shell is slidably installed on the outer wall of the threaded posts through the mounting ports.
[0009] Optionally, a rotating ring is fixedly installed at the bottom end of one of the internally threaded cylinders, and a rotating groove is provided at the top end of the protective shell, with the rotating ring rotatably mounted on the groove wall.
[0010] Optionally, a first motor is fixedly installed on the inner wall of the housing, the output end of the first motor extends to the bottom of the housing, a mounting shaft is fixedly installed on the output end of the first motor, and a blade is fixedly installed at the bottom end of the mounting shaft.
[0011] As can be seen from the above technical solutions, the embodiments of this utility model have the following advantages:
[0012] 1. This utility model discloses a rotary lawnmower with an adjustable cutting blade guard. By setting up a protective mechanism, the protective shell covers the top of the blade, and the mounting ring rotates on the protective shell. The mounting ring rotates in the opposite direction to the blade. When the protective plate moves with the mounting ring, it can provide opposite support to one side of the grass during cutting, so that the blade can cut the grass better.
[0013] 2. The present invention relates to a rotary lawnmower with an adjustable cutting blade protective cover. When a rotating ring is connected to an internal threaded cylinder, the vertical position of the protective cover can be adjusted. Another internal threaded cylinder is used to press the protective cover from above to fix it in place. When it is necessary to clean the bottom of the protective cover or the blade, it is convenient to adjust the vertical height of the protective cover to facilitate cleaning of the bottom of the protective cover or the bottom of the blade.
[0014] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings:
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a side view of the present invention;
[0018] Figure 3 This is a cross-sectional view of the present invention;
[0019] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.
[0020] Explanation of reference numerals in the attached drawings: 1. Outer shell; 2. Threaded column; 3. Internal threaded cylinder; 4. First motor; 5. Protective shell; 6. Mounting ring; 7. Internal gear ring; 8. Protective plate; 9. Second motor; 10. Spur gear; 11. Mounting shaft; 12. Blade; 13. Rotating ring. Detailed Implementation
[0021] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.
[0022] The following describes in detail, with reference to the accompanying drawings, a rotary lawnmower with an adjustable cutting blade guard, according to an embodiment of the present invention. Example 1
[0023] For easier understanding, please refer to Figures 1 to 4 This utility model provides an embodiment of a rotary lawnmower with an adjustable cutting blade guard, including a housing 1, on which a protective mechanism is provided; the protective mechanism includes a protective shell 5, a mounting ring 6, an inner toothed ring 7 and several protective plates 8, the protective shell 5 is installed on the outer wall of the housing 1, the mounting ring 6 is rotatably installed on the inner wall of the protective shell 5, the inner toothed ring 7 is fixedly installed on the inner wall of the mounting ring 6, and several protective plates 8 are fixedly installed on the top of the mounting ring 6 by bolts, with one end of the protective plate 8 extending to the outside of the outer wall of the mounting ring 6.
[0024] It should be noted that by setting up a protective mechanism, the protective shell 5 covers the top of the blade 12, the mounting ring 6 rotates on the protective shell 5, and the rotation direction of the mounting ring 6 is opposite to that of the blade 12. When the protective plate 8 moves with the mounting ring 6, it can provide opposite support to one side of the grass when cutting grass, so that the blade 12 can cut the grass better. When the protective plate 8 moves along the circular trajectory, it can also clear away stones and other debris on the ground to protect the blade 12.
[0025] In some embodiments, such as Figure 3 As shown, the protective plate 8 is T-shaped, and a second motor 9 is fixedly installed at the top of the protective shell 5. The output end of the second motor 9 extends to the bottom end of the protective shell 5. A spur gear 10 is fixedly installed at the output end of the second motor 9, and the spur gear 10 meshes with the inner ring of the internal gear ring 7.
[0026] It should be noted that one end of the T-shaped protective plate 8 supports one side of the grass, while the other end moves stones and other debris on the ground. The second motor 9 starts and drives the spur gear 10 to rotate. The spur gear 10 drives the mounting ring 6 to rotate through meshing with the internal gear ring 7.
[0027] In some embodiments, such as Figure 2 , Figure 3 As shown, a first motor 4 is fixedly installed on the inner wall of the outer casing 1. The output end of the first motor 4 extends to the bottom of the outer casing 1. A mounting shaft 11 is fixedly installed on the output end of the first motor 4. A blade 12 is fixedly installed at the bottom end of the mounting shaft 11.
[0028] It should be noted that the first motor 4 starts and drives the blade 12 to rotate, cutting the grass. Example 2
[0029] In some embodiments, such as Figure 3 As shown, several threaded columns 2 are fixedly installed on the bottom of the outer wall of the outer shell 1. The outer wall of the threaded column 2 is threadedly connected to an internal threaded cylinder 3. Several installation ports are opened at the top of the protective shell 5. The protective shell 5 is slidably installed on the outer wall of the threaded column 2 through the installation ports. A rotating ring 13 is fixedly installed at the bottom of one of the internal threaded cylinders 3. A rotating groove is opened at the top of the protective shell 5. The rotating ring 13 is rotatably installed on the groove wall of the rotating groove.
[0030] It should be noted that when the internally threaded cylinder 3 connected to the protective shell 5 via the rotating ring 13 rotates, the vertical position of the protective shell 5 can be adjusted. The other internally threaded cylinder 3 is used to press the protective shell 5 from above to fix it. When it is necessary to clean the bottom of the protective shell 5 or the blade 12, it is convenient to adjust the vertical height of the protective shell 5 to facilitate cleaning of the bottom of the protective shell 5 or the bottom of the blade 12.
[0031] In this utility model, the first motor 4 and the second motor 9 are known components and will not be described in detail here.
[0032] Working principle: When mowing, the first motor 4 starts and drives the blade 12 to rotate, cutting the grass. At the same time, the second motor 9 starts and drives the spur gear 10 to rotate. The spur gear 10 drives the mounting ring 6 to rotate through meshing with the internal gear ring 7. The protective plate 8 moves along a circular trajectory, which can support the grass from one side.
[0033] The above-described 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 rotary blade mower with an adjustable cutting blade guard, characterized by: Including shell (1), the shell (1) is provided with a protection mechanism on it; The protection mechanism includes a protective shell (5), a mounting ring (6), an inner tooth ring (7) and a plurality of protective plates (8), the protective shell (5) is installed on the outer wall of the shell (1), the mounting ring (6) is rotatably installed on the inner wall of the protective shell (5), the inner tooth ring (7) is fixedly installed on the inner wall of the mounting ring (6), and the plurality of protective plates (8) are fixedly installed on the top of the mounting ring (6) by bolts, one end of the protective plate (8) extends to the outside of the outer wall of the mounting ring (6).
2. A rotary blade lawnmower with an adjustable cutting blade guard according to claim 1, characterized in that: The protective plate (8) is T-shaped.
3. A rotary knife grass trimmer with an adjustable cutting blade guard as claimed in claim 1 wherein: The top of the protective shell (5) is fixedly provided with a second motor (9), the output end of the second motor (9) extends to the bottom of the protective shell (5), and the output end of the second motor (9) is fixedly provided with a spur gear (10).
4. A rotary blade lawnmower with an adjustable cutting blade guard according to claim 3, characterized in that: The spur gear (10) is engaged with the inner ring of the inner tooth ring (7).
5. A rotary knife grass trimmer with an adjustable cutting blade guard as claimed in claim 1 wherein: A plurality of threaded columns (2) are fixedly installed on the bottom of the outer wall of the shell (1), the outer wall of the threaded column (2) is threadedly connected with an internal thread cylinder (3), a plurality of mounting holes are formed in the top of the protective shell (5), and the protective shell (5) is slidably installed on the outer wall of the threaded column (2) through the mounting hole.
6. A rotary blade lawnmower with an adjustable cutting blade guard according to claim 5, characterized in that: The bottom of one of the internal thread cylinders (3) is fixedly provided with a rotating ring (13), the top of the protective shell (5) is provided with a rotating groove, and the rotating ring (13) is rotatably installed on the groove wall of the rotating groove.
7. A rotary knife grass trimmer with an adjustable cutting blade guard as claimed in claim 1 wherein: A first motor (4) is fixedly installed on the inner wall of the shell (1), the output end of the first motor (4) extends to the bottom of the shell (1), the output end of the first motor (4) is fixedly provided with a mounting shaft (11), and the bottom of the mounting shaft (11) is fixedly provided with a blade (12).