Grass trimmer coil

Abstract

The utility model relates to a grass trimmer coil. The grass trimmer coil comprises a coil shell and a winding wheel rotationally installed in the coil shell. The coil shell comprises a coil base and a coil cover mounted on the coil base, and the coil cover is provided with a knocking through hole; the reel is provided with a knocking head arranged in the knocking through hole; an elastic piece is further arranged in the coil shell, and the elastic piece drives the winding wheel to have the trend of moving towards the direction of the coil cover all the time. The knocking head is further sleeved with a sealing gasket used for abutting against the top wall of the inner side of the coil cover, and the probability that weeds enter the coil shell along a gap between the knocking head and the inner wall of the knocking through hole is reduced; therefore, the probability of unsmooth line outgoing of the grass trimming rope of the grass trimmer coil due to the fact that weeds invade the grass trimmer coil in the operation process of the grass trimmer is reduced.

Description

Technical Field

[0001] This application relates to the field of garden tools, and in particular to a lawnmower kit. Background Technology

[0002] In modern horticulture, lawn mowers have become an essential tool for lawn maintenance. The mower coil, as the cutting device of the mower, is particularly important, as its construction directly affects the operator's workload and work quality.

[0003] The existing percussion-type mower coil includes a coil base, a winding reel installed inside the coil housing, a percussion head mounted on the winding reel, a spring installed inside the winding reel, and a coil cover that is snapped and fixed to the coil base. During coil release, the percussion head strikes the ground, causing the winding reel to disengage from the coil housing and rotate relative to it, thus releasing the coil. Therefore, a certain gap exists between the coil cover and the percussion head.

[0004] Regarding the aforementioned technologies, the inventors believe that when using a hammer-type mower for mowing, weeds can enter the mower's coil through the gap between the hammer head and the coil cover. When too many weeds accumulate in the mower's coil, it can easily affect the mowing process. Utility Model Content

[0005] In order to reduce the amount of weeds entering the mower cartridge through the gap between the tapping head and the cartridge cover, this application provides a mower cartridge.

[0006] This application provides a lawnmower coil, which adopts the following technical solution:

[0007] A lawnmower coil includes a coil housing and a winding reel rotatably mounted within the coil housing. The coil housing includes a coil base and a coil cover mounted on the coil base, the coil cover having a striking through hole. The winding reel has a striking head disposed in the striking through hole. An elastic element is also provided inside the coil housing, the elastic element driving the winding reel to always have a tendency to move towards the coil cover. A sealing gasket for abutting against the inner top wall of the coil cover is also fitted at the striking head.

[0008] By adopting the above technical solution and setting the structure of elastic element and sealing gasket, the sealing gasket abuts against the inner top wall of the coil cover under the action of elastic element during the operation of the grass cutter, thereby sealing the striking through hole. This reduces the probability that weeds will enter the coil housing through the gap between the striking head and the inner wall of the striking through hole, thus reducing the probability that weeds will invade the grass cutter coil during operation and cause the grass cutting rope of the grass cutter coil to be difficult to deliver.

[0009] Optionally, the sealing gasket has a plurality of radially arranged anti-slip protrusions on its inner circumferential side, which press against the outer wall of the striking head.

[0010] By adopting the above technical solution, the protective protrusions provided on the inner wall of the sealing gasket help to install the sealing gasket on the outer wall of the striking head and help to improve the axial positioning of the sealing gasket at the striking head.

[0011] Optionally, the anti-slip protrusions have an anti-slip arc surface that mates with the outer wall of the striking head.

[0012] By adopting the above technical solution, anti-slip convex teeth with anti-slip arc surface are set, so that the anti-slip convex teeth are tightly attached to the outer wall of the striking head, which helps to further reduce the axial movement of the sealing gasket at the striking head.

[0013] Optionally, the winding reel has a central protrusion and a plurality of support ribs arranged circumferentially around the central protrusion; the sealing gasket has an arrangement groove for arranging the support ribs.

[0014] By adopting the above technical solution, the sealing gasket is provided with an arrangement groove for arranging the support ribs, so that the support ribs can be arranged in the arrangement groove of the sealing gasket, which helps to reduce the probability of the sealing gasket rotating circumferentially.

[0015] Optionally, the bottom of the coil base is provided with a rotating column, and the winding wheel has a rotating hole at the bottom for arranging the rotating column; the top of the rotating column has a spring hole coaxially provided for arranging the elastic element, one end of the elastic element abuts against the top of the rotating hole and the other end abuts against the bottom surface of the spring hole.

[0016] By adopting the above technical solution, the installation structure of the elastic element at the coil base and coil cover is disclosed. The elastic element is installed in the rotating hole of the rotating column, which makes the installation of the elastic element convenient and the elastic support effect ideal.

[0017] Optionally, the top of the rotating hole is provided with a positioning protrusion, which includes a first protrusion and a second protrusion from top to bottom. The outer diameter of the first protrusion is larger than the outer diameter of the second protrusion, and an abutment step surface for the elastic member to abut is formed at the connection between the first protrusion and the second protrusion.

[0018] By adopting the above technical solution, the elastic element is supported on the abutting step surface of the first and second protrusions, which helps to ensure the elastic support effect of the elastic element.

[0019] Optionally, the striking head includes an inner protrusion and a metal cover sleeved on the outside of the inner protrusion, the inner protrusion being integrally formed with the winding reel.

[0020] By adopting the above technical solution, the outside of the striking head is covered with a metal cover, so that when the striking head needs to be struck to lay the line, the metal cover will strike the ground. Compared with directly striking the ground with plastic material, the above-mentioned striking head structure helps to extend its service life.

[0021] Optionally, the coil base has a plug groove and an opening on the outer wall of the plug groove. The plug groove has locking protrusions on both sides of the outer wall and the opening. The bottom surface of the locking protrusion has a locking surface. The coil cover has a locking tab that is elastic and cooperates with the plug groove. The locking tab has a pressing protrusion that cooperates with the opening. The locking tab also has a locking part that corresponds to the locking protrusion and abuts against the locking surface.

[0022] By adopting the above technical solution, a detachable connection structure for the coil base and coil cover is disclosed. The coil base and coil cover are connected by a plug groove and a locking tab, making it easy to assemble and disassemble them.

[0023] Optionally, the top surface of the locking protrusion has a guide slope for the locking part to abut against.

[0024] By adopting the above technical solution, the guide slope provided on the locking protrusion can be used for the locking part to abut, thereby guiding the locking part so that the locking insert can undergo elastic deformation, thus making it easier to lock the locking insert in the insertion groove.

[0025] Optionally, the coil base has a lead-out hole for the straw rope of the winding reel to pass through; the coil housing is provided with a contact post on one side of the lead-out hole for the straw rope to contact; the coil base has a first insertion hole for the contact post to be inserted.

[0026] By adopting the above technical solution, when using the hay cutter coil for line release, the setting of the contact post has a guiding effect on the hay cutting rope, thereby reducing the probability of the hay cutting rope getting tangled in the inner cavity of the hay cutter coil.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. A mower coil, comprising a coil housing, a winding reel, a striking head, an elastic element, and a sealing gasket. By setting the structure of the elastic element and the sealing gasket, during the operation of the mower, the sealing gasket abuts against the inner top wall of the coil cover under the action of the elastic element, thereby sealing the striking through hole and reducing the probability of weeds entering the coil housing through the gap between the striking head and the inner wall of the striking through hole. This reduces the probability of weeds invading the mower coil during operation, causing the mower rope to not emerge smoothly.

[0029] 2. The protective protrusions on the inner wall of the sealing gasket help to install the sealing gasket on the outer wall of the striking head and help to improve the axial positioning of the sealing gasket at the striking head;

[0030] 3. The cable base and cable cover are connected by a plug-in slot and a locking tab, making it easy to assemble and disassemble the two. Attached Figure Description

[0031] Figure 1 This is a cross-sectional schematic diagram of the lawnmower coil in an embodiment of this application.

[0032] Figure 2 This is a schematic diagram of the structure of the lawnmower coil without the coil cover installed in the embodiment of this application.

[0033] Figure 3 This is a schematic diagram of the structure of the wire sheath cover in the embodiments of this application.

[0034] Figure 4 yes Figure 1 A magnified view of a portion of point A in the middle.

[0035] Figure 5 This is a top view of the sealing gasket in an embodiment of this application.

[0036] Figure 6 This is a schematic diagram of the coil base in an embodiment of this application.

[0037] Explanation of reference numerals in the attached drawings: 1. Coil housing; 11. Coil base; 111. Insertion slot; 1111. Arrangement opening; 1112. Locking protrusion; 1112A. Locking surface; 1112B. Guide slope; 112. Cable outlet hole; 113. First insertion hole; 12. Coil cover; 121. Locking insert; 1211. Locking part; 1212. Pressing protrusion; 122. Tapping through hole; 13. Contact post; 14. Rotating column; 141. Spring hole; 2. Winding wheel; 21. Rotating hole; 23. Positioning protrusion; 231. First protrusion; 232. Second protrusion; 233. Stepped surface; 24. Central protrusion; 25. Support rib; 26. Striking head; 261. Inner protrusion; 262. Metal cover; 3. Elastic element; 4. Sealing gasket; 41. Anti-slip teeth; 411. Anti-slip arc surface; 42. Arrangement groove. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-6 This application will be further described in detail below. An embodiment of this application discloses a lawnmower coil. (Refer to...) Figure 1The mower coil includes a coil housing 1, a winding wheel 2 rotatably mounted within the coil housing 1, an elastic element 3 supported between the coil housing 1 and the winding wheel 2, and a sealing washer 4 disposed on the winding wheel 2. The coil housing 1 includes a coil base 11 and a coil cover 12 mounted on the coil base 11. The elastic element 3 drives the winding wheel 2 to always tend to move towards the coil cover 12. In this embodiment, the elastic element 3 is a compression spring.

[0039] Reference Figure 2 The coil base 11 is a cylindrical shell with an open top. Two insertion slots 111 are formed on the outer wall of the coil base 11, and each insertion slot 111 has an outlet 1111 on its outer wall. A locking protrusion 1112 is provided on both sides of each outlet 1111. The bottom surface of the locking protrusion 1112 is a locking surface 1112A, and the top of the locking protrusion 1112 has a guide slope 1112B.

[0040] Reference Figure 2 and Figure 3 The coil cover 12 has locking tabs 121 arranged in a one-to-one correspondence with the insertion slots 111 of the coil base 11. The locking tabs 121 are made of elastic plastic sheet structure. The locking tabs 121 have pressing protrusions 1212 that mate with the arrangement openings 111. The bottom sides of the locking tabs 121 are provided with locking parts 1211 for mate with the locking protrusions 1112. When the coil base 11 and the coil cover 12 are assembled, the locking parts 1211 abut against the locking surfaces 1112A of the locking protrusions 1112.

[0041] Reference Figure 1 and Figure 4 The coil base 11 also has a rotating column 14 at its bottom center. The top of the rotating column 14 has a spring hole 141 for arranging the elastic element 3. The bottom of the winding wheel 2 has a rotating hole 21 for cooperating with the rotating column 14. The winding wheel 2 has a positioning protrusion 23 at the top of the rotating hole 21. The positioning protrusion 23 includes a first protrusion 231 and a second protrusion 232 from top to bottom. The outer diameter of the first protrusion 231 is larger than the outer diameter of the second protrusion 232, and a stepped surface 233 for the elastic element 3 to abut at the connection between the first protrusion 231 and the second protrusion 232.

[0042] Refer to 1 and Figure 2 The winding reel 2 has a central protrusion 24 at its center, and eight supporting ribs 25 are arranged circumferentially on the top surface of the winding reel 2. A striking head 26 is also provided on the top surface of the central protrusion 24. A striking through hole 122 for the striking head 26 to pass through is provided at the center of the coil cover 12. The striking head 26 includes an inner protrusion 261 integrally formed with the striking head 26 and a metal cover 262 sleeved on the outside of the inner protrusion 261.

[0043] Reference Figure 1 and Figure 5 A sealing washer 4 is fitted onto the striking head 26 to abut against the inner top wall of the casing cover 12. The sealing washer 4 has multiple radially arranged anti-slip protrusions 41 on its inner circumferential surface, which press against the outer wall of the striking head 26. Each anti-slip protrusion 41 has an anti-slip arc surface 411 that mates with the outer wall of the striking head 26, ensuring that the anti-slip protrusions 41 are tightly against the outer wall of the striking head 26. The bottom end of the sealing washer 4 has an arrangement groove 42 for arranging the support rib 25, allowing the support rib 25 to be arranged within the arrangement groove 42 of the sealing washer 4, thereby reducing the probability of circumferential rotation of the sealing washer 4.

[0044] Reference Figure 2 and Figure 6 The side wall of the coil base 11 has an outlet hole 112 for the straw rope of the winding reel 2 to pass through. A contact post 13 for the straw rope to contact is provided on one side of the outlet hole 112. The coil base 11 has a first insertion hole 113 for the bottom end of the contact post 13 to be inserted. The straw rope on the winding reel 2 contacts the guiding contact post 13 and extends out through the outlet hole 112 of the coil base 11, thereby reducing the probability of the straw rope tangling inside the straw bundle of the straw trimmer.

[0045] The implementation principle of a grass trimmer coil in this application embodiment is as follows: First, the elastic element 3 is placed into the spring hole 141 inside the winding wheel 2. Then, the rotating hole 21 arranged in the center of the winding wheel 2 is axially sleeved with the rotating column 14 of the coil base 11. Simultaneously, the grass trimming rope wound on the surface of the winding wheel 2 is guided to pass through the outlet hole 112 of the coil base 11 along a preset path. Next, a sealing washer 4 is installed at the striking head 26 on the top of the winding wheel 2. The upper end face of the sealing washer 4 forms an elastic abutment with the inner top wall of the coil cover 12. Finally, the locking insert 121 of the coil cover 12 is inserted and locked with the corresponding snap-fit ​​groove of the coil base 11, so that the coil cover 12 is snapped onto the coil base 11.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lawnmower coil, characterized in that, The device includes a coil housing (1) and a winding wheel (2) rotatably mounted inside the coil housing (1); the coil housing (1) includes a coil base (11) and a coil cover (12) mounted on the coil base (11), the coil cover (12) having a striking through hole (122); the winding wheel (2) has a striking head (26) arranged in the striking through hole (122); an elastic element (3) is also provided inside the coil housing (1), the elastic element (3) driving the winding wheel (2) to always have a tendency to move toward the coil cover (12); a sealing gasket (4) for abutting against the inner top wall of the coil cover (12) is also sleeved at the striking head (26).

2. The lawnmower coil according to claim 1, characterized in that, The sealing gasket (4) has multiple radially arranged anti-slip protrusions (41) on its inner circumference that press against the outer wall of the striking head (26).

3. A lawnmower coil according to claim 2, characterized in that, The anti-slip protrusions (41) have an anti-slip arc surface (411) that mates with the outer wall of the striking head (26).

4. A lawnmower coil according to claim 1, characterized in that, The winding reel (2) has a central protrusion (24) arranged at its center and a plurality of support ribs (25) arranged circumferentially on the central protrusion (24); the sealing gasket (4) has an arrangement groove (42) for arranging the support ribs (25).

5. A lawnmower coil according to claim 1, characterized in that, The bottom of the coil base (11) is provided with a rotating column (14), and the winding wheel (2) has a rotating hole (21) at the bottom for the rotating column (14) to be arranged; the top of the rotating column (14) is coaxially provided with a spring hole (141) for the elastic element (3) to be arranged, and one end of the elastic element (3) abuts against the top of the rotating hole (21) and the other end abuts against the bottom surface of the spring hole (141).

6. A lawnmower coil according to claim 5, characterized in that, The top of the rotating hole (21) is provided with a positioning protrusion (23). The positioning protrusion (23) includes a first protrusion (231) and a second protrusion (232) from top to bottom. The outer diameter of the first protrusion (231) is larger than the outer diameter of the second protrusion (232), and an abutment step surface (233) for the spring to abut is formed at the connection between the first protrusion (231) and the second protrusion (232).

7. A lawnmower coil according to claim 1, characterized in that, The striking head (26) includes an inner protrusion (261) and a metal cover (262) sleeved on the outside of the inner protrusion (261). The inner protrusion (261) is integrally formed with the winding wheel (2).

8. A lawnmower coil according to claim 1, characterized in that, The coil base (11) has a plug groove (111) and an arrangement opening (1111) on the outer wall of the plug groove (111). The plug groove (111) has locking protrusions (1112) on both sides of the outer wall and the arrangement opening (1111). The bottom surface of the locking protrusions (1112) has a locking surface (1112A). The coil cover (12) has a locking insert (121) that is elastic and cooperates with the plug groove (111). The locking insert (121) has a pressing protrusion (1212) that cooperates with the arrangement opening (1111). The locking insert (121) also has a locking part (1211) that corresponds one-to-one with the locking protrusions (1112) and abuts against the locking surface.

9. A lawnmower coil according to claim 8, characterized in that, The top surface of the locking protrusion (1112) has a guide slope (1112B) for the locking part (1211) to abut against.

10. A lawnmower coil according to claim 1, characterized in that, The coil base (11) has a wire outlet hole (112) for the straw rope of the winding reel (2) to pass through; the coil housing (1) has a contact post (13) on one side of the wire outlet hole (112) for the straw rope to contact; the coil base (11) has a first insertion hole (113) for the contact post (13) to be inserted.

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