Lightweight grass trimming head with adjusting function
By designing structures such as turntables, guide columns, pallets and discs in the grass-punch, the existing grass-punching head has solved the problem of cumbersome operation of adjusting the length of plastic knife strips, and a fast and convenient blade length adjustment is achieved.
Patent Information
- Application Number
- CN202421312330.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The existing grass-punching heads are cumbersome when adjusting the length of plastic blades, which require disassembly and reorganization. The user needs to carry blades of different lengths with him, which increases the difficulty of operation.
A lightweight sturtle head with adjustment function was designed. By setting up a rotary dial, guide column, pallet and disc, and using structures such as snaps, torsion springs and limiting grooves, the plastic knife bars can be quickly adjusted and fixed.
It realizes rapid adjustment of the length of the plastic knife strip, simplifies the operation process, reduces the disassembly of the grass head and the tool, and improves the user's operation convenience.
Smart Images
Figure CN222786408U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of weeding tools, in particular to a lightweight weeding head with an adjustment function. Background Art
[0002] A mowing head refers to a device installed at the end of a lawn mower. It is used to trim weeds in flower beds, lawns and other areas to ensure that they are clean and beautiful. Currently, most of the mowing heads on the market are rotary mowing heads. The mowing head is installed on the end of the lawn mower and rotated at high speed, and the plastic blade installed on the mowing head cuts the grass to achieve the purpose of weeding.
[0003] The existing mowing head needs to be equipped with plastic blades of different lengths according to different weeding environments when in use. When replacing the plastic blade, the mowing head needs to be removed from the lawn mower, and then the outer shell of the mowing head is removed and the screws on the mowing head for fixing the plastic blade are removed, the original plastic blade is removed and the required plastic blade is installed, and then the screws and the outer shell are reinstalled to complete the switching of the plastic blade length.
[0004] When adjusting the length of the plastic blade of the above-mentioned grass trimmer head, a series of tools are needed to disassemble and reassemble the grass trimmer head. The operation process is relatively cumbersome, and the user is required to carry plastic blades of different lengths with him / her, which is not easy for the user to operate anytime and anywhere, thereby increasing the difficulty of operation for the user. Utility Model Content
[0005] Based on this, the purpose of the utility model is to provide a lightweight grass trimmer head with an adjustment function to solve the technical problems mentioned in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lightweight grass trimmer head with an adjustment function, comprising a chassis, a first round pile is arranged on the outer wall of the chassis, and a buckle is sleeved on the outer wall of the first round pile, a second round pile is arranged on the top of the chassis, and a torsion spring is sleeved on the outer wall of the second round pile, a baffle is installed on the outer wall of the chassis, a fourth round pile is welded on the end of the buckle, a sleeve is welded on the top of the chassis, a turntable is sleeved on the outer wall of the sleeve, and two groups of protrusions are arranged on the top of the turntable, two groups of guide columns are installed on the outer wall of the turntable, a slot is provided at the bottom of the turntable, a disc is provided at the top of the turntable, and a circular groove is provided on the top of the disc, a fixer is installed on the inner wall of the circular groove, and two groups of limiting grooves are provided on the outer wall of the fixer, a plastic knife strip is provided on the inner wall of the limiting groove, two groups of the first through holes are provided on the inner wall of the circular groove, and a tray is provided at the bottom of the disc.
[0007] By adopting the above technical solution, when the grass trimming head rotates at high speed, the buckle and the slot are engaged to achieve fixation between the turntable and the chassis, so that there is no relative sliding between the turntable and the chassis when the grass trimming head is working. By providing a limit groove, it is convenient to install the plastic blade inside the disc, thereby achieving fixation of the plastic blade.
[0008] The utility model is further configured such that a first circular hole is opened at the bottom of the turntable, and the inner wall of the first circular hole fits with the outer wall of the sleeve, the two groups of guide columns are symmetrically arranged about the center line of the turntable, and the guide columns are composed of two cylinders with different bottom diameters.
[0009] By adopting the above technical solution, by setting the first circular hole and the sleeve, it is convenient to connect the turntable to the top of the chassis, and by setting a guide column on the outer wall of the turntable, it is convenient to guide the plastic knife strip when adjusting the length of the plastic knife strip, making the process of adjusting the length of the plastic knife strip smoother and easier for users to operate.
[0010] The utility model is further configured that a second through hole is opened on the inner wall of the tray, two groups of the second stoppers are installed inside the tray, the height of the second stoppers is lower than the horizontal line of the lower edge of the second through hole, and a first stopper is installed on one side of the protrusion.
[0011] By adopting the above technical solution, when the turntable is rotated, the first stopper on the protrusion will contact the second stopper on the tray, thereby driving the tray to rotate through the turntable. When the tray rotates, the second through hole opened on the inner wall of the tray will exert force on the plastic knife strip, thereby making the plastic knife strip better expanded and contracted, and the height of the second stopper is lower than the horizontal line of the lower edge of the second through hole, so as not to interfere with the plastic knife strip during the process of expanding and contracting the plastic knife strip.
[0012] The utility model is further configured as follows: a third round pile is welded to the bottom of the disc, a second round hole is opened at the bottom of the tray, the tray is sleeved on the outer wall of the third round pile through the second round hole, the sleeve is threadedly connected to the third round pile, the limiting groove is aligned with the opening of the first through hole, and a plastic knife strip is inserted between the limiting groove and the first through hole.
[0013] By adopting the above technical solution, by sleeved the tray on the outer wall of the third round pile, it is convenient for the tray to rotate when adjusting the length of the plastic knife strip. By setting the first through hole whose opening is aligned with the limit groove, it is convenient to pass the plastic knife strip through and fix it inside the disc to prevent it from loosening and falling off.
[0014] The utility model is further configured such that the second round hole is movably connected to the third round pile, the plastic knife strip is inserted between the first through hole and the second through hole, the plastic knife strip is slidably connected to the guide column, one end of the torsion spring is in contact with the outer wall of the fourth round pile, and the other end of the torsion spring is in contact with the outer wall of the baffle.
[0015] By adopting the above technical solution, by passing the plastic blade strip between the first through hole and the second through hole, the plastic blade strip can be retracted into the tray when it is shrunk, thereby making the plastic blade strip easier to shrink and place. By arranging a torsion spring on the outer wall of the chassis, it is beneficial to realize automatic resetting of the buckle when the mowing head stops rotating, thereby releasing the lock between the turntable and the chassis.
[0016] In summary, the utility model mainly has the following beneficial effects:
[0017] The utility model is provided with a turntable, a guide column, a tray and a disc. When installing the plastic knife strip, the plastic knife strip is passed through the first through hole and the second through hole through the limiting groove, so that the end of the plastic knife strip passes through the inner wall of the second through hole, and the tray is rotated so that the plastic knife strip is tightened inwardly and wrapped around the outer wall of the third round pile under the action of the tray and the second through hole. Finally, the end of the plastic knife strip passes through the guide column, and the disc is installed to the upper end of the turntable to complete the installation of the plastic knife strip. When adjusting the length of the plastic knife strip, the turntable is rotated so that the guide column on the turntable guides the plastic knife strip so that the plastic knife strip obtains outward tension, thereby making the plastic knife strip wrapped in the disc open outward and stretch. When the length of the plastic knife strip stretches to the required length, the turntable is stopped to complete the adjustment. During the length adjustment process, there is no need to disassemble the grass trimmer head or use any tools, so that the adjustment process is more concise and convenient, and easy for users to operate. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the structure of the utility model;
[0019] Figure 2 It is a three-dimensional diagram of the chassis of the utility model;
[0020] Figure 3 It is a three-dimensional diagram of the turntable of the utility model;
[0021] Figure 4 It is a top view of the turntable of the utility model;
[0022] Figure 5 A three-dimensional diagram of a disc of the present utility model;
[0023] Figure 6 A three-dimensional diagram of a tray of the utility model;
[0024] Figure 7 This is a structural schematic diagram of the second embodiment of the present utility model.
[0025] In the figure: 1. chassis; 11. first round pile; 12. second round pile; 121. torsion spring; 13. baffle; 14. buckle; 141. fourth round pile; 15. sleeve; 2. turntable; 21. protrusion; 211. first stopper; 22. guide column; 23. first round hole; 24. slot; 3. disc; 31. round slot; 311. fixer; 312. limit slot; 32. first through hole; 33. tray; 331. second through hole; 332. second round hole; 333. second stopper; 34. third round pile; 4. plastic knife strip; 5. slide slot; 51. slider; 52. spring. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.
[0027] The following describes an embodiment of the utility model based on its overall structure.
[0028] Embodiment 1
[0029] A lightweight trimmer head with adjustable function, such as Figure 1 - Figure 6 As shown, it includes a chassis 1, a first round pile 11 is provided on the outer wall of the chassis 1, and a buckle 14 is sleeved on the outer wall of the first round pile 11, a second round pile 12 is provided on the top of the chassis 1, and a torsion spring 121 is sleeved on the outer wall of the second round pile 12, which is conducive to limiting and resetting the buckle 14, a baffle 13 is installed on the outer wall of the chassis 1, a fourth round pile 141 is welded on the end of the buckle 14, a sleeve 15 is welded on the top of the chassis 1, which is conducive to installing the turntable 2 on the outer wall of the sleeve 15, the outer wall of the sleeve 15 is sleeved with the turntable 2, and two groups of protrusions 21 are provided on the top of the turntable 2, two groups of guide columns 22 are installed on the outer wall of the turntable 2, and a card slot 24 is opened at the bottom of the turntable 2, which is conducive to the card slot set on the outer wall of the chassis 1 The buckle 14 is combined to lock the chassis 1 and the turntable 2. When the grass trimming head rotates at a high speed, the buckle 14 is engaged with the slot 24 to fix the turntable 2 and the chassis 1, so that the turntable 2 and the chassis 1 will not slide relative to each other when the grass trimming head is working. A disc 3 is arranged on the top of the turntable 2, and a circular groove 31 is opened on the top of the disc 3, and a fixer 311 is installed on the inner wall of the circular groove 31, and two groups of limiting grooves 312 are opened on the outer wall of the fixer 311, and a plastic blade strip 4 is arranged on the inner wall of the limiting groove 312, and the plastic blade strip 4 is installed in the disc 3 to fix the plastic blade strip 4, and the inner wall of the circular groove 31 is opened with two groups of first through holes 32, and a tray 33 is arranged at the bottom of the disc 3.
[0030] See also Figure 1 , Figure 3 and Figure 5 A first circular hole 23 is provided at the bottom of the turntable 2, and the inner wall of the first circular hole 23 fits with the outer wall of the sleeve 15, which is conducive to sleeve the turntable 2 on the top of the chassis 1. The two groups of guide columns 22 are symmetrically arranged about the center line of the turntable 2, and the guide columns 22 are composed of two cylinders with different bottom diameters, which is conducive to guiding the plastic knife strip 4 when adjusting the length of the plastic knife strip 4, making the process of adjusting the length of the plastic knife strip 4 smoother and easier for users to operate.
[0031] See also Figure 1 , Figure 3 and Figure 6 A second through hole 331 is provided on the inner wall of the tray 33, and two groups of second stops 333 are installed inside the tray 33. The height of the second stops 333 is lower than the horizontal line of the lower edge of the second through hole 331. A first stop 211 is installed on one side of the protrusion 21. When the turntable 2 is rotated, the first stop 211 on the protrusion 21 will contact the second stop 333 on the tray 33, thereby driving the tray 33 to rotate through the turntable 2. When the tray 33 rotates, the second through hole 331 provided on the inner wall of the tray 33 will generate a force on the plastic knife strip 4, thereby making the plastic knife strip 4 better expand and contract, and the height of the second stop 333 is lower than the horizontal line of the lower edge of the second through hole 331, and will not interfere with the plastic knife strip 4 during the process of expanding and contracting it.
[0032] See also Figure 2 , Figure 5 and Figure 6 A third round pile 34 is welded to the bottom of the disc 3, and a second round hole 332 is opened at the bottom of the tray 33. The tray 33 is sleeved on the outer wall of the third round pile 34 through the second round hole 332. By sleeved on the outer wall of the third round pile 34, the tray 33 is convenient to rotate when adjusting the length of the plastic knife strip 4. The sleeve 15 is threadedly connected to the third round pile 34, and the limiting groove 312 is aligned with the opening of the first through hole 32, which is conducive to passing and fixing the plastic knife strip 4 inside the disc 3 to prevent it from loosening and falling off. A plastic knife strip 4 is passed between the limiting groove 312 and the first through hole 32.
[0033] See also Figure 2 , Figure 4 , Figure 5 and Figure 6 The second round hole 332 is movably connected with the third round pile 34, and the plastic blade strip 4 is arranged between the first through hole 32 and the second through hole 331, which is conducive to retracting the plastic blade strip 4 into the tray 33 when shrinking it, so that the plastic blade strip 4 is easier to shrink and place, and the plastic blade strip 4 is slidably connected with the guide column 22, one end of the torsion spring 121 is in contact with the outer wall of the fourth round pile 141, and the other end of the torsion spring 121 is in contact with the outer wall of the baffle 13, which is conducive to realizing the automatic resetting of the buckle 14 when the grass trimming head stops rotating, thereby releasing the lock between the turntable 2 and the chassis 1.
[0034] Embodiment 2
[0035] A lightweight trimmer head with adjustable function, such as Figure 7 As shown, the technical scheme and parts of this embodiment are basically the same as those of the first embodiment, and the technically identical parts will not be repeated here. The difference is that a slide groove 5 is installed on the outer wall of the chassis 1, and a slider 51 is slidably installed on the outer wall of the slide groove 5, and a spring 52 is connected to the end of the slider 51, one end of the spring 52 is fixed to the inner wall of the slide groove 5, and the other end of the spring 52 is fixed to the end of the slider 51, and the slider 51 is movably connected to the slot 24. When the lawn mower starts working, the mowing head starts to rotate at a high speed. At this time, the slider 51 on the outer wall of the chassis 1 begins to slide outward on the inner wall of the slide groove 5 under the action of centrifugal force and stretches the spring 52. The slider 51 slides outward until it is opened with the outer wall of the turntable 2 The locking groove 24 is combined with the designed one, so that the turntable 2 and the chassis 1 remain relatively still, and the turntable 2 is prevented from rotating during the high-speed rotation of the grass trimming head, which affects the rotation process. After use, the grass trimming head is removed, and the grass trimming head stops rotating. Since the slider 51 loses the effect of centrifugal force, the slider 51 slides inward along the slide groove 5 under the action of the elastic force of the spring 52 to reset, and the lock between the turntable 2 and the chassis 1 is released. By providing the slide groove 5, the slider 51 and the spring 52, the slider 51 can lock the turntable 2 and the chassis 1 when the grass trimming head rotates at a high speed, preventing the turntable 2 from rotating, thereby ensuring the normal operation of the grass trimming head.
[0036] The working principle of the utility model is as follows: the plastic knife strip 4 is passed through the first through hole 32 and the second through hole 331 through the limiting groove 312, so that the end of the plastic knife strip 4 passes through the inner wall of the second through hole 331, and the tray 33 is rotated by the protrusion 21, so that the plastic knife strip 4 is tightened inwardly and wrapped around the outer wall of the third round pile 34 under the action of the tray 33 and the second through hole 331, and finally the end of the plastic knife strip 4 passes through the guide column 22, and the disc 3 is installed to the upper end of the turntable 2 to complete the installation of the plastic knife strip 4, and then the turntable 2 is rotated so that the guide column 22 on the turntable 2 is aligned with the plastic knife strip 4. The knife strip 4 is guided so that the plastic knife strip 4 obtains outward tension, so that the plastic knife strip 4 slides on the outer wall of the guide column 22 and expands outward. During the expansion of the plastic knife strip 4, since the tray 33 is acted upon by the force of the plastic knife strip 4, the tray 33 will rotate around the outer wall of the third round pile 34, so that the plastic knife strip 4 wrapped in the disc 3 is opened outward and stretched. When the length of the plastic knife strip 4 is stretched to the required length, the rotation of the turntable 2 is stopped to complete the adjustment of the length of the plastic knife strip 4, and the disc 3 and the turntable 2 are installed to the upper end of the chassis 1 through the third round pile 34. The grass head is installed on the lawn mower. When the lawn mower starts working, the grass head starts to rotate at high speed. At this time, the end of the buckle 14 on the chassis 1 begins to expand outward around the first round pile 11 due to the centrifugal force and squeezes the torsion spring 121 through the fourth round pile 141 welded on its outer wall. The buckle 14 expands to combine with the slot 24 on the outer wall of the turntable 2, so that the turntable 2 and the chassis 1 remain relatively still, preventing the turntable 2 from rotating during the high-speed rotation of the grass head and affecting the rotation process. After use, the grass head is removed, and the grass head stops rotating at this time. The end of the buckle 14 loses the effect of centrifugal force, and under the action of the elastic force of the torsion spring 121, the buckle 14 rotates around the first round pile 11 to reset, and the turntable 2 is rotated until the first stop block 211 on the inner wall of the protrusion 21 contacts the second stop block 333. The turntable 2 continues to rotate. Due to the interaction between the first stop block 211 and the second stop block 333, the tray 33 will rotate synchronously with the turntable 2, so that the plastic knife strip 4 is tightened inward and wrapped around the outer wall of the third round pile 34 under the action of the tray 33 and the second through hole 331, completing the retraction of the plastic knife strip 4 and completing the entire weeding process.
[0037] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.
Claims
1. A lightweight grass trimmer head with an adjustable function, comprising a chassis (1), characterized in that: The outer wall of the chassis (1) is provided with a first round pile (11), and the outer wall of the first round pile (11) is sleeved with a buckle (14); the top of the chassis (1) is provided with a second round pile (12), and the outer wall of the second round pile (12) is sleeved with a torsion spring (121); the outer wall of the chassis (1) is installed with a baffle (13), and the end of the buckle (14) is welded with a fourth round pile (141); the top of the chassis (1) is welded with a sleeve (15), and the outer wall of the sleeve (15) is sleeved with a turntable (2), and the top of the turntable (2) is provided with two groups of protrusions (21); Two groups of guide columns (22) are installed on the outer wall of the turntable (2), a slot (24) is provided at the bottom of the turntable (2), a disc (3) is provided at the top of the turntable (2), a circular groove (31) is provided at the top of the disc (3), a fixer (311) is installed on the inner wall of the circular groove (31), two groups of limiting grooves (312) are provided on the outer wall of the fixer (311), a plastic knife strip (4) is provided on the inner wall of the limiting groove (312), two groups of first through holes (32) are provided on the inner wall of the circular groove (31), and a tray (33) is provided at the bottom of the disc (3).
2. The lightweight grass trimmer head with an adjustable function according to claim 1, characterized in that: A first circular hole (23) is provided at the bottom of the rotating disk (2), and the inner wall of the first circular hole (23) is in contact with the outer wall of the sleeve (15).
3. The lightweight grass trimmer head with an adjustable function according to claim 1, characterized in that: The two groups of guide columns (22) are symmetrically arranged about the center line of the rotating disk (2), and the guide columns (22) are composed of two cylinders with different bottom diameters.
4. The lightweight grass trimmer head with an adjustable function according to claim 1, characterized in that: A second through hole (331) is provided on the inner wall of the tray (33), two groups of second stoppers (333) are installed inside the tray (33), the height of the second stoppers (333) is lower than the horizontal line of the lower edge of the second through hole (331), and a first stopper (211) is installed on one side of the protrusion (21).
5. The lightweight grass trimmer head with an adjustable function according to claim 1, characterized in that: A third round pile (34) is welded to the bottom of the disc (3), a second round hole (332) is opened at the bottom of the tray (33), the tray (33) is sleeved on the outer wall of the third round pile (34) through the second round hole (332), and the sleeve (15) is threadedly connected to the third round pile (34).
6. The lightweight grass trimmer head with an adjustable function according to claim 1, characterized in that: The limiting groove (312) and the opening of the first through hole (32) are aligned, and a plastic knife strip (4) is provided between the limiting groove (312) and the first through hole (32).
7. The lightweight grass trimmer head with an adjustable function according to claim 5, characterized in that: The second circular hole (332) is movably connected to the third circular pile (34), the plastic blade (4) is inserted between the first through hole (32) and the second through hole (331), and the plastic blade (4) is slidably connected to the guide column (22).
8. The lightweight grass trimmer head with an adjustable function according to claim 1, characterized in that: One end of the torsion spring (121) contacts the outer wall of the fourth round pile (141), and the other end of the torsion spring (121) fits the outer wall of the baffle (13).