Lawn mower capable of preventing grass winding
By using a lifting chassis and serrated blade design, the problems of grass tangling and blade tangling are solved, enabling the lawnmower to operate efficiently and output stably.
Patent Information
- Application Number
- CN202520315074.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-25
AI Technical Summary
Traditional lawnmowers have a non-adjustable chassis height, causing grass to get tangled in the narrow space below the chassis. Furthermore, the straight blades are prone to forming long grass strands that get tangled, increasing the risk of blade shaft entanglement and affecting mowing efficiency.
Featuring a liftable chassis and serrated blades, the lifting mechanism controls the chassis height via a drive motor, while the serrated blades cut grass clippings regularly, reducing the risk of grass contacting and tangling with the chassis.
It effectively reduces the risk of grass tangling, keeps the blades rotating normally, improves the stable power output and efficiency of the lawnmower, and prevents grass clippings from clogging the grass discharge channel.
Smart Images
Figure CN223885732U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lawnmower technology, specifically a lawnmower designed to prevent grass tangling. Background Technology
[0002] Lawn mowers are widely used tools in lawn maintenance and gardening. Traditional lawn mowers often face the problem of grass tangling during operation. Lawns contain a wide variety of grasses with diverse growth patterns, and their height, density, and resilience vary depending on the season and environmental conditions. When the mower blades cut the grass, due to the grass's flexibility and the mechanical action of the mower, the grass easily becomes tangled in the blade shafts, chassis components, and grass removal channels.
[0003] Existing lawnmowers with non-adjustable chassis height cause excessive contact between grass and the chassis bottom, making it prone to accumulating and tangling in the narrow space below. Furthermore, traditional lawnmower blades are typically straight-edged, which easily form long, tangled grass strands, increasing the risk of blade shaft entanglement. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned technical defects and provide a lawnmower with a liftable chassis and serrated blades to prevent grass tangling.
[0005] To solve the above problems, the technical solution of this utility model is as follows: a lawnmower that prevents grass tangling, comprising a support column and a chassis, with brackets connected to both ends of the support column, a lifting mechanism inside the brackets, fixing blocks fixedly connected to both ends of one side of the chassis, electric push rods connected to one side of each of the two fixing blocks, support blocks connected to the ends of each of the two electric push rods, an electric rotating shaft fixedly connected to the opposite side of the two support blocks, and a plurality of blades fixedly connected to the outside of the electric rotating shaft.
[0006] Furthermore, the lifting mechanism includes two drive motors, which are respectively connected to the top of the two brackets. The output ends of the two drive motors are respectively fixedly connected to lead screws. The ends of the two lead screws are respectively rotatably connected to the inside of the two brackets, and movable blocks are respectively threaded to the outer sides of the two lead screws in the same horizontal direction. The chassis is fixedly connected to the opposite side of the two movable blocks.
[0007] Furthermore, two limiting rods are fixedly connected to the inner sides of the two brackets, and the two limiting rods pass through the two movable blocks respectively.
[0008] Furthermore, the chassis is placed at an angle and has a rounded corner design at one end.
[0009] Furthermore, several of the blades have a serrated end design.
[0010] Furthermore, rollers are connected to one side of each of the two brackets.
[0011] Furthermore, both of the electric actuators are of the same specification.
[0012] The advantages of this invention compared to existing technologies are as follows:
[0013] (1) This utility model is equipped with a lifting mechanism. By starting two drive motors, their two output ends drive two lead screws to rotate, which in turn drive two movable blocks to raise and lower the chassis. During mowing, the chassis height can be flexibly adjusted according to the height and growth of the grass. When the grass is tall and dense, raising the chassis reduces the contact between the grass and the bottom of the chassis, reducing the chance of the grass being caught between the chassis and the blades. Because a higher chassis provides more space for grass clippings, they can fall more smoothly from the bottom of the mower or be discharged by the grass discharge system, avoiding the grass from accumulating and tangling in the narrow space under the chassis.
[0014] (2) This utility model is equipped with a serrated blade. Compared with traditional straight blades, the grass clippings cut by the serrated blade are relatively regular in shape, and are less likely to form long and tangled grass strips. This effectively reduces the risk of blade shaft entanglement, ensures normal and efficient blade rotation, maintains stable power output of the lawnmower, and improves mowing efficiency. Attached Figure Description
[0015] Figure 1 This utility model relates to a three-dimensional lawnmower designed to prevent grass tangling. Figure 1 .
[0016] Figure 2 This utility model relates to a three-dimensional lawnmower designed to prevent grass tangling. Figure 2 .
[0017] Figure 3 This utility model relates to a three-dimensional lifting mechanism in a lawnmower designed to prevent grass tangling. Figure 3 .
[0018] As shown in the figure: 1. Support column; 2. Bracket; 3. Lifting mechanism; 301. Drive motor; 302. Lead screw; 303. Movable block; 304. Limiting rod; 4. Chassis; 5. Fixed block; 6. Electric push rod; 7. Support block; 8. Electric rotating shaft; 9. Blade; 10. Roller. Detailed Implementation
[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.
[0020] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.
[0021] To make the content of this utility model easier to understand, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0022] like Figures 1 to 3 As shown, a lawnmower designed to prevent grass tangling includes a support column 1 and a chassis 4. Support brackets 2 are connected to both ends of the support column 1. A lifting mechanism 3 is installed inside each support bracket 2. Fixing blocks 5 are fixedly connected to both ends of one side of the chassis 4. Electric push rods 6 are connected to one side of each of the two fixing blocks 5. Support blocks 7 are connected to the ends of each of the two electric push rods 6. An electric rotating shaft 8 is fixedly connected to the opposite side of each of the two support blocks 7. Rollers 10 are connected to one side of each of the two support brackets 2. The two electric push rods 6 are of the same specification. The two electric push rods 6 can further reduce the distance between the chassis 4 and the blades 9, preventing grass clippings from tangling between the blades 9 and the chassis 4.
[0023] The chassis 4 is tilted and has a rounded corner at one end. This tilted placement and rounded corner design conforms to the natural sliding motion of grass clippings under gravity. During mowing, the cut grass clippings, pushed by the blades 9 and guided by the tilt angle of the chassis 4, can slide more quickly from the lower end of the chassis 4, reducing the time grass clippings remain on the chassis 4 and the possibility of accumulation. This lowers the risk of grass clippings tangling and clogging the discharge channel, keeping the discharge system unobstructed, thereby improving the overall working efficiency and performance of the lawnmower.
[0024] Several blades 9 are fixedly connected to the outer side of the electric rotating shaft 8, and the blades 9 have serrated ends. Compared with traditional straight blades, the grass clippings cut by the serrated blades 9 are relatively regular in shape, and are less likely to form long and tangled grass strips. This effectively reduces the risk of blade shaft entanglement, ensures normal and efficient blade rotation, maintains stable power output of the lawnmower, and improves mowing efficiency.
[0025] The lifting mechanism 3 includes two drive motors 301, each connected to the top of one of the two brackets 2. The output ends of each drive motor 301 are fixedly connected to lead screws 302, the ends of which are rotatably connected to the inside of each bracket 2. Movable blocks 303 are threaded onto the outer sides of each lead screw 302 in the same horizontal direction. The chassis 4 is fixedly connected to the opposite side of each of the movable blocks 303. Two limiting rods 304 are fixedly connected to the inner sides of each bracket 2, passing through each of the movable blocks 303. By activating the two drive motors 301, their output ends drive the two lead screws 302 to rotate, which in turn drives the two movable blocks 303 to raise or lower the chassis 4. During mowing, the height of the chassis 4 can be flexibly adjusted according to the height and growth of the grass. When the grass is tall and dense, raising the chassis 4 reduces the contact between the grass and the bottom of the chassis, decreasing the chance of the grass getting caught between the chassis 4 and the blades 9. The higher chassis provides more space for grass clippings, allowing them to fall more smoothly from the bottom of the mower or be discharged by the grass removal system, preventing grass from piling up and tangling in the narrow space under the chassis.
[0026] In practical use, by activating the two drive motors 301, their two output ends drive the two lead screws 302 to rotate, which in turn drive the two movable blocks 303 to raise and lower the chassis 4. During mowing, the height of the chassis 4 can be flexibly adjusted according to the height and growth of the grass. When the grass is tall and dense, raising the chassis 4 reduces the contact between the grass and the bottom of the chassis, lowering the chance of grass getting caught between the chassis 4 and the blades 9. The higher chassis provides more space for the grass clippings, allowing them to fall more smoothly from the bottom of the mower or be discharged by the grass removal system, preventing grass from accumulating and tangling in the narrow space below the chassis. The grass clippings cut by the serrated blades 9 are relatively regular in shape, less likely to form long, tangled grass strips, effectively reducing the risk of blade shaft entanglement, ensuring normal and efficient blade rotation, maintaining stable power output of the mower, and improving mowing efficiency.
[0027] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A lawnmower with anti-grass entanglement function, comprising a support column (1) and a chassis (4), characterized in that: The support column (1) is connected to brackets (2) at both ends. The brackets (2) are equipped with lifting mechanisms (3). The chassis (4) is fixedly connected to two ends at one side. The two fixed blocks (5) are connected to electric push rods (6) on one side. The ends of the two electric push rods (6) are connected to support blocks (7). The two support blocks (7) are fixedly connected to opposite sides of each other. The electric push rods (8) are fixedly connected to a number of blades (9) on the outside of the electric push rods (8).
2. The lawnmower with anti-grass tangling function according to claim 1, characterized in that: The lifting mechanism (3) includes two drive motors (301), which are respectively connected to the top of the two brackets (2). The output ends of the two drive motors (301) are respectively fixedly connected to lead screws (302). The ends of the two lead screws (302) are respectively rotatably connected to the inside of the two brackets (2). The two lead screws (302) are respectively threadedly connected to movable blocks (303) in the same horizontal direction on the outside of the two lead screws (302). The chassis (4) is fixedly connected to the opposite side of the two movable blocks (303).
3. A lawnmower with anti-grass entanglement function according to claim 2, characterized in that: Two limiting rods (304) are fixedly connected to the inner sides of the two brackets (2), and the two limiting rods (304) pass through the two movable blocks (303) respectively.
4. A lawnmower with anti-grass entanglement function according to claim 1, characterized in that: The chassis (4) is placed at an angle and has a rounded corner design at one end.
5. A lawnmower with anti-grass entanglement function according to claim 1, characterized in that: Several of the blades (9) are designed with serrated ends.
6. A lawnmower with anti-grass entanglement function according to claim 1, characterized in that: Rollers (10) are connected to one side of each of the two brackets (2).
7. A lawnmower with anti-grass entanglement function according to claim 1, characterized in that: The two electric actuators (6) are of the same specification.