Blade protection mechanism for a lawnmower
By designing a rotatable protective cover and a pulling structure on the lawnmower, the problem of blades colliding with stones during cutting is solved, thus protecting the blades and extending their lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN YIBEI INTELLIGENT EQUIP CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-06-26
AI Technical Summary
Backpack lawnmower blades are prone to collisions with stones in the grass during the cutting process, leading to damage. The lack of effective protection mechanisms also affects their service life.
Design a blade protection mechanism including a protective cover, a connecting rod, and a pulling structure. The protective cover can rotate to cover the top and front sides of the blade. The protective cover is opened and closed by pulling the connecting rod and the pull ring. The front side of the protective cover is provided with a cutting groove and a spade tooth to avoid collision. A limit block ensures the stability of the protective cover position.
When encountering stones or other debris, the protective cover can automatically lower to protect the blades and prevent collision damage. The shovel teeth push away the stones, and the limit block prevents scratches and extends the blade life.
Smart Images
Figure CN224402230U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lawnmowers, and in particular to a blade protection mechanism for lawnmowers. Background Technology
[0002] Backpack lawnmowers typically use disc-mounted blades or cutting ropes for mowing. When using blades, it's important to avoid collisions between the blades and stones in the grass, as these collisions can easily damage the blades. Furthermore, the lack of effective protection for the blades during the cutting process can shorten their lifespan. Utility Model Content
[0003] To address the aforementioned problems, this utility model provides a blade protection mechanism for a lawnmower, which can protect the blades during the cutting process and improve their service life.
[0004] The technical solution of this utility model is as follows:
[0005] A blade protection mechanism for a lawnmower includes a protective cover, a connecting rod, and a pulling structure. The protective cover is rotatably mounted on the front side of the lawnmower's working head and can be rotated to cover the top and front sides of the blade. A first hinge is provided on the top of the protective cover. One end of the connecting rod is hinged to the protective cover through the first hinge, and the other end is connected to the pulling structure. A plurality of cutting grooves communicating with the bottom side of the protective cover are evenly provided on the front side of the protective cover.
[0006] In a further technical solution, the pulling structure includes a pull ring, a second hinge, and a third hinge. The pull ring is hinged to the operating lever of the lawnmower via the second hinge. The third hinge is located on the pull ring, and the pull ring is hinged to the connecting rod via the third hinge.
[0007] In a further technical solution, the bottom of both sides of the cutting groove of the protective cover is provided with spade teeth.
[0008] In a further technical solution, the thickness of the shovel teeth gradually decreases in the direction away from the protective cover, and the top surface of the shovel teeth is arc-shaped.
[0009] In a further technical solution, a limiting block is provided inside the protective cover. When the protective cover rotates and covers the top and front sides of the blade, the limiting block abuts against the side wall of the working head of the lawnmower.
[0010] In a further technical solution, the top front side of the working head of the lawnmower is provided with two symmetrically arranged connecting plates, and the top rear side of the protective cover is provided with a connector that can be embedded between the two connecting plates. The connecting plates are respectively provided with a first through hole, and the connector is provided with a second through hole with the same diameter as the first through hole. Bolts for connecting the connecting plates and the connector are passed through the first through hole and the second through hole.
[0011] The beneficial effects of this utility model are:
[0012] 1. A blade guard is installed on the front side of the working head of the backpack lawnmower. During normal use, the blade guard can be opened by pulling the connecting rod through the pull mechanism to cut grass. If there are many stones or other debris, the guard can be lowered to protect the blade and allow weeds to pass through the cutting groove for cutting, avoiding damage to the blade from collision with debris.
[0013] 2. The shovel teeth on the front of the protective cover make it easy to scoop up and push away the stones;
[0014] 3. The limit block limits the rotation position of the protective cover to prevent scratching with the blade. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the blade protection mechanism of the lawnmower described in this embodiment of the utility model, which is installed on the lawnmower.
[0016] Figure 2 This is a schematic diagram of the front side of the protective cover according to an embodiment of the present invention;
[0017] Figure 3 This is a top view of the connection between the protective cover and the working head in an embodiment of this utility model.
[0018] Explanation of reference numerals in the attached figures:
[0019] 10. Protective cover; 11. First hinge; 12. Cutting groove; 13. Shovel teeth; 14. Connector; 20. Connecting rod; 31. Blade; 32. Operating lever; 33. Front handle; 34. Working head; 35. Connecting piece; 36. Bolt; 41. Pull ring; 42. Second hinge; 43. Third hinge; 44. Collar. Detailed Implementation
[0020] The embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0021] Example:
[0022] like Figures 1-2As shown, a blade protection mechanism for a lawnmower includes a protective cover 10, a connecting rod 20, and a pulling structure. The protective cover 10 is rotatably mounted on the front side of the working head 34 of the lawnmower, and can be rotated to cover the top and front sides of the blade 31. The top of the protective cover 10 is provided with a first hinge 11. One end of the connecting rod 20 is hinged to the protective cover 10 through the first hinge 11, and the other end is connected to the pulling structure. The pulling structure includes a pull ring 41, a second hinge 42, and a third hinge 43. The pull ring 41 is hinged to the operating lever 32 of the lawnmower through the second hinge 42. The pull ring 41 can be positioned close to the front handle 33 of the existing lawnmower, making it convenient to operate the pull ring 41 while holding the front handle 33 with one hand. The third hinge 43 is provided on the pull ring 41, and the pull ring 41 is hinged to the connecting rod 20 through the third hinge 43. The front side of the protective cover 10 is evenly provided with a plurality of cutting grooves 12 that communicate with the bottom side of the protective cover 10.
[0023] The working principle of the above technical solution is as follows:
[0024] In normal use, pull the ring 41 to rotate relative to the operating lever 32, lift it up and pull the connecting rod 20, so that the other end of the connecting rod 20 pulls the protective cover 10 to flip upward relative to the working head 34, opening the protective cover 10 of the blade 31 for cutting grass. If there are many stones or other debris, the protective cover 10 can be lowered. When working, the lowest position of the front side of the protective cover 10 is lower than the bottom of the blade 31 to prevent the blade 31 from touching the ground, while blocking debris and protecting the blade 31. Only weeds can pass through the cutting groove 12 for cutting, avoiding damage to the blade 31 from collision with debris.
[0025] In another embodiment, such as Figure 1-2 As shown, the bottom of both sides of the cutting groove 12 of the protective cover 10 is provided with shovel teeth 13; the thickness of the shovel teeth 13 gradually decreases in the direction away from the protective cover 10, and the top surface of the shovel teeth 13 is arc-shaped, which is conducive to shoveling up debris.
[0026] The shovel teeth 13 on the front side of the protective cover 10 make it easy to scoop up and push away the stones.
[0027] In another embodiment, such as Figure 1 As shown, a limiting block is provided inside the protective cover 10. When the protective cover 10 rotates and covers the top and front sides of the blade 31, the limiting block abuts against the side wall of the working head 34 of the lawnmower.
[0028] The limit block restricts the rotation position of the protective cover 10 to prevent it from scratching the blade 31.
[0029] In another embodiment, such as Figure 3As shown, the top front side of the working head 34 of the lawnmower is provided with two symmetrically arranged connecting plates 35, and the top rear side of the protective cover 10 is provided with a connector 14 that can be inserted between the two connecting plates 35. The connecting plates 35 are respectively provided with a first through hole, and the connector 14 is provided with a second through hole with the same diameter as the first through hole. Bolts 36 for connecting the connecting plates 35 and the connector 14 are passed through the first through hole and the second through hole. In addition, the second hinge 42 is detachably connected to the operating lever 32 through a ring 44.
[0030] When the protective cover 10 is not in use, it can be disassembled by unscrewing the bolt 36, removing the collar 44 from the operating lever 32, and the entire protective mechanism can be removed. It can be reinstalled when needed without affecting the normal use of the existing lawnmower.
[0031] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. A blade protection mechanism for a mower, characterised in that, The device includes a protective cover, a connecting rod, and a pulling structure. The protective cover is rotatably mounted on the front side of the working head of the lawnmower and can be rotated to cover the top and front sides of the blade. The top of the protective cover is provided with a first hinge. One end of the connecting rod is hinged to the protective cover through the first hinge, and the other end is connected to the pulling structure. The front side of the protective cover is evenly provided with multiple cutting grooves that communicate with the bottom side of the protective cover.
2. A mower blade protection mechanism according to claim 1, characterised in that, The pulling structure includes a pull ring, a second hinge, and a third hinge. The pull ring is hinged to the operating lever of the lawnmower via the second hinge. The third hinge is located on the pull ring, and the pull ring is hinged to the connecting rod via the third hinge.
3. The mower blade protection mechanism of claim 1, wherein, The bottom of the cutting groove on both sides of the protective cover is provided with spade teeth.
4. A mower blade protection mechanism according to claim 3, wherein The thickness of the shovel teeth gradually decreases in the direction away from the protective cover, and the top surface of the shovel teeth is arc-shaped.
5. The mower blade protection mechanism of claim 1, wherein, The protective cover is equipped with a limiting block. When the protective cover rotates and covers the top and front sides of the blade, the limiting block abuts against the side wall of the working head of the lawnmower.
6. A mower blade protection mechanism according to claim 5, wherein The top front side of the working head of the lawnmower is provided with two symmetrically arranged connecting plates. The top rear side of the protective cover is provided with a connector that can be inserted between the two connecting plates. The connecting plates are respectively provided with a first through hole. The connector is provided with a second through hole with the same diameter as the first through hole. Bolts for connecting the connecting plates and the connector are passed through the first through hole and the second through hole.