Double sleeve guard type mower head

Abstract

A double-layer sleeve protection type mowing mechanical head, comprising a cutter shaft, a protective cover is arranged outside the cutter shaft; further comprising a first anti-winding sleeve, a second anti-winding sleeve and a supporting sleeve, the first anti-winding sleeve is sleeved outside the second anti-winding sleeve, the second anti-winding sleeve is sleeved outside the supporting sleeve, the first anti-winding sleeve is connected with the protective cover, the second anti-winding sleeve is connected with the cutter shaft, and the supporting sleeve is connected with the protective cover; a transmission part is arranged in the supporting sleeve, and the cutter shaft is rotationally connected with the supporting sleeve through the transmission part; the first anti-winding sleeve is sleeved outside the second anti-winding sleeve, the second anti-winding sleeve is sleeved outside the supporting sleeve, double-layer protection is formed at both ends of the cutter shaft, the side of the supporting sleeve close to the gap between the protective cover and the cutter shaft is blocked, the weeds are prevented from entering the supporting sleeve and winding on the transmission part, and the service life of the transmission part is prolonged, and the working of the mowing mechanical head is improved.

Description

Technical Field

[0001] This utility model belongs to the field of automated lawnmower equipment, and specifically relates to lawnmower mechanical heads. Background Technology

[0002] The existing lawnmower blade shaft is connected to the protective cover via a bearing. When the blade shaft rotates to cut weeds, a certain gap needs to be set between it and the protective cover and bearing support to avoid friction between the blade shaft and the protective cover.

[0003] However, when the blade shaft drives the cutting rotation, the weeds near the ends of the blade shaft are easily entered into the gap between the ends of the blade shaft and the protective cover under the action of centrifugal force, and then into the bearing. This causes the blade shaft to be unable to rotate in the bearing, which seriously affects the operation of the lawnmower head.

[0004] To address this issue, our company has developed a "double-sleeve protective mowing head" that can prevent weeds from getting tangled inside the bearings. Utility Model Content

[0005] To address the aforementioned problems, this utility model designs a double-sleeve protective lawnmower head, including a blade shaft with a protective cover installed outside the blade shaft; it also includes an anti-tangling sleeve one, an anti-tangling sleeve two, and a support sleeve. The anti-tangling sleeve one is fitted outside the anti-tangling sleeve two, and the anti-tangling sleeve two is fitted outside the support sleeve. The anti-tangling sleeve one is connected to the protective cover, the anti-tangling sleeve two is connected to the blade shaft, and the support sleeve is connected to the protective cover.

[0006] The support sleeve is equipped with a transmission component, and the cutter shaft is rotatably connected to the support sleeve through the transmission component.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting the first anti-tangling sleeve on the outside of the second anti-tangling sleeve, the second anti-tangling sleeve is fitted on the outside of the support sleeve, which can form a double layer of protection at both ends of the cutter shaft. The first anti-tangling sleeve effectively prevents weeds from getting tangled at both ends of the cutter shaft, and at the same time slows down the progress of weeds entering the gap between the cutter shaft and the protective cover. By setting the second anti-tangling sleeve inside the first anti-tangling sleeve, the two ends of the cutter shaft are further sealed to prevent weeds from entering the gap. By setting the support sleeve inside the second anti-tangling sleeve, the side of the support sleeve near the gap between the protective cover and the cutter shaft is sealed to prevent weeds from entering the support sleeve and to prevent weeds from getting tangled on the transmission components, thereby improving the service life of the transmission components and improving the operation of the mowing machine head.

[0008] Furthermore, the anti-tangling sleeve is disposed on the inner side of the protective cover;

[0009] The anti-tangle sleeve includes an anti-tangle side plate, one end of which is connected to the inner wall of the protective cover and extends along the axial direction of the cutter shaft.

[0010] The second anti-tangle sleeve includes an anti-tangle base plate and an anti-tangle side plate. The anti-tangle base plate is disposed on the outer periphery of the cutter shaft and connected to the cutter shaft. The second anti-tangle side plate is disposed on the side of the anti-tangle base plate near the transmission component and connected to the anti-tangle base plate. The second anti-tangle side plate extends along the axial direction of the cutter shaft.

[0011] The axial extension direction of the first anti-tangle sleeve is opposite to that of the second anti-tangle sleeve.

[0012] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by setting the anti-tangling sleeve one inside the protective cover, the end of the cutter shaft inside the protective cover is protected, preventing weeds from getting tangled on the end of the cutter shaft. The anti-tangling side plate one extends axially inside the protective cover, and at the same time, it is opposite to the axial extension direction of the anti-tangling sleeve two, which increases the effect of double-layer axial anti-tangling. At the same time, the anti-tangling bottom plate and the anti-tangling side plate two can block weeds from entering the anti-tangling sleeve one, greatly reducing the amount of weeds entering the gap between the cutter shaft and the protective cover.

[0013] Furthermore, the first anti-entanglement sleeve is an annular sleeve, the length of the first anti-entanglement sleeve is 20-50mm, and the thickness of the first anti-entanglement sleeve is 1-20mm.

[0014] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by using the anti-tangling sleeve with a length of 20-50mm and a thickness of 1-20mm, it is possible to effectively prevent weeds inside the protective cover from tangling around the two ends of the cutter shaft.

[0015] Furthermore, the end of the cutter shaft is provided with a mounting platform, and the anti-tangle base plate and the anti-tangle side plate form an anti-tangle groove around the mounting platform of the cutter shaft, and one end of the support sleeve extends into the anti-tangle groove;

[0016] Preferably, the anti-tangle base plate is an annular plate, the second anti-tangle side plate is an annular sleeve, the anti-tangle groove is an annular groove, and the mounting platform is an annular platform;

[0017] More preferably, the anti-tangling groove has a width of 2-8mm and a depth of 2-10mm.

[0018] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by setting an anti-entanglement base plate and an anti-entanglement side plate on the outside of the cutter shaft, an anti-entanglement groove is formed around the mounting platform of the cutter shaft, thereby forming a double-layer protective plate on the outside of the transmission component inside the support sleeve, so that a protective space is formed between the cutter shaft and the support sleeve, effectively preventing weeds from entering the transmission component. At the same time, with the anti-entanglement base plate being an annular plate and the anti-entanglement side plate being an annular sleeve, the anti-entanglement sleeve can cooperate with the rotation of the cutter shaft to ensure the stability of the cutter shaft during rotation.

[0019] Furthermore, both ends of the cutter shaft penetrate the center of the anti-entanglement sleeve and the side wall of the protective cover;

[0020] The anti-tangle side plate is fitted outside the anti-tangle side plate two, and the gap between the anti-tangle side plate one and the anti-tangle side plate two is less than 30mm;

[0021] The vertical distance from the anti-tangle base plate to the end of the anti-tangle side plate furthest from the protective cover is 20-40mm.

[0022] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by penetrating the center of the anti-tangling sleeve one and the side wall of the protective cover at both ends of the cutter shaft, the two ends of the cutter shaft are protected, preventing weeds from getting tangled at both ends of the cutter shaft; by ensuring that the gap between the anti-tangling side plate one and the anti-tangling side plate two is less than 30mm, and by ensuring that the vertical distance from the anti-tangling bottom plate to the end of the anti-tangling side plate one away from the protective cover is 20-40mm, weeds inside the protective cover can be effectively blocked from entering the transmission component.

[0023] Furthermore, the protective cover is provided with a mounting groove, a mounting plate is provided on one side of the mounting groove, the mounting plate is provided with mounting holes, and the mounting plate is located inside the protective cover and is detachably connected to the protective cover.

[0024] The first anti-entanglement sleeve is connected to the mounting plate, and the first anti-entanglement sleeve communicates with the mounting hole and the mounting groove;

[0025] Preferably, the mounting groove is an annular groove and a straight groove, the straight groove extends to the bottom end of the side wall, and the mounting hole is an annular hole;

[0026] The diameter of the annular groove in the mounting slot is larger than the diameter of the mounting hole.

[0027] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by setting the mounting groove, it is convenient for the cutter shaft to be installed from the bottom end of the straight groove on the side wall of the protective cover into the annular groove, and then the mounting plate is used to seal the mounting groove to prevent weeds from getting tangled into the transmission component from the bottom end.

[0028] Furthermore, the support sleeve is provided with a connecting plate, the connecting plate is provided with a first connecting hole, the protective cover is provided with a second connecting hole, and locking bolts are provided in the first connecting hole and the second connecting hole;

[0029] Preferably, the support sleeve is an annular sleeve.

[0030] The beneficial effect of adopting the above-mentioned further technical solution is that by setting a connecting plate on the support sleeve, the support sleeve can be connected to the protective cover, thereby ensuring that the cutter shaft rotates stably within the bearing.

[0031] Furthermore, the mounting plate extends along the straight groove to the bottom of the side wall of the protective cover, and a discharge channel is provided between the connecting plate and the mounting plate, the discharge channel being connected to the anti-tangling sleeve.

[0032] The width of the mounting plate is wider than the width of the mounting groove.

[0033] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the mounting plate extends along the straight groove to the bottom of the side wall of the protective cover, and a discharge channel is provided between the connecting plate and the mounting plate. When there are weeds inside the anti-tangling sleeve, they can be discharged from the discharge channel to the outside of the protective cover, avoiding the accumulation of weeds inside the anti-tangling sleeve and further preventing weeds from getting tangled inside the transmission components.

[0034] Furthermore, the transmission component is a bearing, and the transmission component is disposed on the outside of the protective cover;

[0035] The support sleeve is provided with a retaining platform, the height of which does not exceed the height of the outer ring of the bearing.

[0036] A limiting stage is provided on the cutter shaft inside the support sleeve, and the height of the limiting stage is lower than the height of the inner ring of the bearing.

[0037] The diameter of the cutter shaft disposed in the support sleeve is smaller than the diameter of the middle part of the cutter shaft, and the bearing is disposed between the clamping table and the limiting table;

[0038] Preferably, the holding platform is a ring-shaped platform, and the limiting platform is a ring-shaped platform;

[0039] Preferably, a sealing ring is provided on the bearing.

[0040] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by setting a retaining platform on the support sleeve and a limiting platform on the cutter shaft, the bearing is held between the limiting platform and the retaining platform, preventing the bearing from shifting, ensuring the stable rotation of the cutter shaft, and forming a protective gap between the bearing and the cutter shaft, which can ensure that the friction between the bearing and the cutter shaft is small while preventing weeds from entering the bearing.

[0041] Furthermore, the blade shaft is equipped with several grass-chopping blades, which are located inside the protective cover;

[0042] One end of the cutter shaft is provided with a connecting cavity, which is connected to the drive mechanism.

[0043] The beneficial effect of adopting the above-mentioned further technical solution is that the connection between the drive mechanism and the connecting cavity of the cutter shaft ensures that the cutter shaft drives the grass shredder to cut weeds. Attached Figure Description

[0044] Figure 1 This is a structural diagram of a lawnmower head;

[0045] Figure 2 This is a cross-sectional view of the head of a lawnmower.

[0046] Figure 3 This is an enlarged view of section A of the cross-sectional view of the lawnmower head in Example 1;

[0047] Figure 4 This is a structural diagram of the cutter shaft;

[0048] Figure 5 A structural diagram showing the fit between the anti-entanglement sleeve and the mounting plate;

[0049] Figure 6 This is a structural schematic diagram of the transmission component support base;

[0050] Figure 7 This is a schematic diagram of the protective cover.

[0051] Figure 8 This is a schematic diagram of the structure of the protective cover side plate and the cutter shaft.

[0052] Figure 9 This is an enlarged view of section A of the sectional view of the lawnmower head in Example 2;

[0053] Markings in the diagram: 1. Cutter shaft; 11. Mounting platform; 12. Limiting platform; 13. Connecting cavity; 2. Protective cover; 21. Mounting groove; 22. Mounting plate; 221. Mounting hole; 23. Connecting hole two; 3. Anti-tangle sleeve one; 31. Anti-tangle side plate one; 4. Anti-tangle sleeve two; 41. Anti-tangle bottom plate; 42. Anti-tangle side plate two; 43. Anti-tangle groove; 5. Transmission component; 6. Transmission component support seat; 61. Support sleeve; 62. Connecting plate; 621. Connecting hole one; 63. Holding platform; 7. Discharge channel; 8. Grass shredder; Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model.

[0055] This embodiment provides Embodiment 1: Please refer to... Figure 1-8To address the aforementioned problems, this utility model designs a double-sleeve protective lawnmower head, including a blade shaft 1, with a protective cover 2 installed outside the blade shaft 1; it also includes an anti-tangling sleeve 3, an anti-tangling sleeve 4, and a support sleeve 61. The anti-tangling sleeve 3 is sleeved outside the anti-tangling sleeve 4, and the anti-tangling sleeve 4 is sleeved outside the support sleeve 61. The anti-tangling sleeve 3 is connected to the protective cover 2, the anti-tangling sleeve 4 is connected to the blade shaft 1, and the support sleeve 61 is connected to the protective cover 2. A transmission component 5 is installed inside the support sleeve 61, and the blade shaft 1 is rotatably connected to the support sleeve 61 through the transmission component 5. By placing anti-tangling sleeve 3 on the outside of anti-tangling sleeve 4, and placing anti-tangling sleeve 4 on the outside of support sleeve 61, double-layer protection can be formed at both ends of the cutter shaft 1. Anti-tangling sleeve 3 effectively prevents weeds from getting tangled at both ends of the cutter shaft 1, and at the same time slows down the progress of weeds entering the gap between the cutter shaft 1 and the protective cover 2. By placing anti-tangling sleeve 4 inside anti-tangling sleeve 3, the two ends of the cutter shaft 1 are further sealed to prevent weeds from entering the gap. By placing support sleeve 61 inside anti-tangling sleeve 4, the side of support sleeve 61 near the gap between the protective cover 2 and the cutter shaft 1 is sealed to prevent weeds from entering support sleeve 61 and preventing weeds from getting tangled on the transmission component 5, thereby improving the service life of the transmission component 5 and improving the operation of the mowing machine head.

[0056] The first anti-tangle sleeve 3 is disposed inside the protective cover 2; the first anti-tangle sleeve 3 includes an anti-tangle side plate 31, one end of which is connected to the inner wall of the protective cover 2 and extends axially along the cutter shaft 1; the second anti-tangle sleeve 4 includes an anti-tangle base plate 41 and an anti-tangle side plate 42, the base plate 41 is disposed on the outer periphery of the cutter shaft 1 and connected to the cutter shaft 1, and the side plate 42 is disposed on the side of the base plate 41 near the transmission component 5 and connected to the base plate 41, and extends axially along the cutter shaft 1; the axial extension direction of the first anti-tangle sleeve 3 is opposite to the axial extension direction of the second anti-tangle sleeve 4. The anti-tangling sleeve 3 is installed inside the protective cover 2 to protect the end of the cutter shaft 1 inside the protective cover 2, preventing weeds from getting tangled on the end of the cutter shaft 1. The anti-tangling side plate 31 extends axially inside the protective cover 2, and at the same time, it extends in the opposite direction to the axial extension of the anti-tangling sleeve 4, which increases the effect of double-layer axial anti-tangling. At the same time, the anti-tangling bottom plate 41 and the anti-tangling side plate 42 can block weeds from entering the anti-tangling sleeve 3, which greatly reduces the amount of weeds entering the gap between the cutter shaft 1 and the protective cover 2.

[0057] The anti-tangling sleeve 3 is an annular sleeve with a length of 20-50mm and a thickness of 1-20mm. The 20-50mm length and 1-20mm thickness of the anti-tangling sleeve 3 effectively prevent weeds inside the protective cover 2 from tangling around both ends of the cutter shaft 1.

[0058] The end of the cutter shaft 1 is provided with a mounting platform 11. The anti-tangle base plate 41 and the second anti-tangle side plate 42 form an anti-tangle groove 43 around the mounting platform 11 of the cutter shaft 1. One end of the support sleeve 61 extends into the anti-tangle groove 43. Preferably, the anti-tangle base plate 41 is an annular plate, the second anti-tangle side plate 42 is an annular sleeve, the anti-tangle groove 43 is an annular groove, and the mounting platform 11 is an annular platform. More preferably, the groove width of the anti-tangle groove 43 is 2-8mm, and the groove depth of the anti-tangle groove 43 is 2-10mm. By setting an anti-entanglement base plate 41 and an anti-entanglement side plate on the outside of the cutter shaft 1, an anti-entanglement groove 43 is formed around the mounting platform 11 of the cutter shaft 1, thereby forming a double-layer protective plate on the outside of the transmission component 5 inside the support sleeve 61, creating a protective space between the cutter shaft 1 and the support sleeve 61, effectively preventing weeds from entering the transmission component 5. At the same time, the anti-entanglement base plate 41 is an annular plate and the anti-entanglement side plate is an annular sleeve, which enables the anti-entanglement sleeve 4 to cooperate with the rotation of the cutter shaft 1, ensuring the stability of the cutter shaft 1 during rotation.

[0059] The cutter shaft 1 penetrates the center of the anti-entanglement sleeve 3 and the side wall of the protective cover 2 at both ends; the anti-entanglement side plate 31 is sleeved on the outside of the anti-entanglement side plate 42, and the gap between the anti-entanglement side plate 31 and the anti-entanglement side plate 42 is less than 30mm; the vertical distance from the anti-entanglement bottom plate 41 to the end of the anti-entanglement side plate 31 away from the protective cover 2 is 20-40mm. By penetrating the center of the anti-entanglement sleeve 3 and the side wall of the protective cover 2 at both ends of the cutter shaft 1, the two ends of the cutter shaft 1 are protected, preventing weeds from entangled at both ends of the cutter shaft 1; the gap between the anti-entanglement side plate 31 and the anti-entanglement side plate 42 is less than 30mm, and the vertical distance from the anti-entanglement bottom plate 41 to the end of the anti-entanglement side plate 31 away from the protective cover 20-40mm, effectively preventing weeds inside the protective cover from entering the transmission component 5.

[0060] The protective cover 2 is provided with a mounting groove 21, and a mounting plate 22 is provided on one side of the mounting groove 21. The mounting plate 22 is provided with a mounting hole 221, and the mounting plate 22 is disposed inside the protective cover 2 and detachably connected to the protective cover 2. The anti-entanglement sleeve 3 is connected to the mounting plate 22, and the anti-entanglement sleeve 3 communicates with the mounting hole 221 and the mounting groove 21. Preferably, the mounting groove 21 is an annular groove and a straight groove, the straight groove extends to the bottom end of the side wall, and the mounting hole 221 is an annular hole. The diameter of the annular groove of the mounting groove 21 is larger than the diameter of the mounting hole 221. By providing the mounting groove 21, it is convenient for the cutter shaft 1 to be installed into the annular groove from the bottom end of the straight groove on the side wall of the protective cover 2, and then the mounting plate 22 seals the mounting groove 21 to prevent weeds from getting entangled into the transmission component 5 from the bottom end.

[0061] A connecting plate 62 is provided on the support sleeve 61, and a first connecting hole 621 is provided on the connecting plate 62. A second connecting hole 23 is provided on the protective cover 2. Locking bolts are provided in the first connecting hole 621 and the second connecting hole 23. Preferably, the support sleeve 61 is an annular sleeve. By providing the connecting plate 62 on the support sleeve 61, the support sleeve 61 can be connected to the protective cover 2, thereby ensuring that the cutter shaft 1 rotates stably within the bearing.

[0062] The mounting plate 22 extends along the straight groove to the bottom of the side wall of the protective cover 2. A discharge channel 7 is provided between the connecting plate 62 and the mounting plate 22, and the discharge channel 7 communicates with the anti-tangling sleeve 3. The width of the mounting plate 22 is wider than the width of the mounting groove 21. By extending the mounting plate 22 along the straight groove to the bottom of the side wall of the protective cover 2, and by providing a discharge channel 7 between the connecting plate 62 and the mounting plate 22, when there are weeds inside the anti-tangling sleeve 3, they can be discharged to the outside of the protective cover 2 through the discharge channel 7, preventing weeds from accumulating inside the anti-tangling sleeve 3, and further preventing weeds from getting tangled inside the transmission component 5.

[0063] The transmission component 5 is a bearing, and it is located on the outside of the protective cover 2. A retaining platform 63 is provided inside the support sleeve 61, and the height of the retaining platform 63 does not exceed the height of the outer ring of the bearing. A limiting platform 12 is provided on the cutter shaft 1 located inside the support sleeve 61, and the height of the limiting platform 12 is lower than the height of the inner ring of the bearing. The diameter of the cutter shaft 1 located inside the support sleeve 61 is smaller than the diameter of the middle portion of the cutter shaft 1. The bearing is located between the retaining platform 63 and the limiting platform 12. Preferably, the retaining platform 63 is an annular platform, and the limiting platform 12 is an annular platform. More preferably, a sealing ring is provided on the bearing. By providing the retaining platform 63 on the support sleeve 61 and the limiting platform 12 on the cutter shaft 1, the bearing is retained between the limiting platform 12 and the retaining platform 63, preventing bearing misalignment and ensuring stable rotation of the cutter shaft 1. A protective gap is formed between the bearing and the cutter shaft 1, ensuring low friction between them while preventing weeds from entering the bearing.

[0064] The blade shaft 1 is equipped with several grass-chopping blades 8, which are located inside the protective cover 2. One end of the blade shaft 1 is provided with a connecting cavity 13, which is connected to the drive mechanism. The connection between the drive mechanism and the connecting cavity 13 of the blade shaft 1 ensures that the blade shaft 1 drives the grass-chopping blades 8 to cut weeds.

[0065] This embodiment provides Embodiment 2: as follows Figure 9 As shown,

[0066] The transmission component consists of several balls, which are disposed between the limiting platform 12 and the holding platform 63.

[0067] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Although this utility model 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; and these 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 utility model.

Claims

1. A double-layer sleeve protective type lawnmower head, characterized in that: The device includes a cutter shaft (1) with a protective cover (2) on its outside; it also includes an anti-tangle sleeve (3), an anti-tangle sleeve (4), and a support sleeve (61). The anti-tangle sleeve (3) is fitted on the outside of the anti-tangle sleeve (4), and the anti-tangle sleeve (4) is fitted on the outside of the support sleeve (61). The anti-tangle sleeve (3) is connected to the protective cover (2), the anti-tangle sleeve (4) is connected to the cutter shaft (1), and the support sleeve (61) is connected to the protective cover (2). A transmission component (5) is provided inside the support sleeve (61), and the cutter shaft (1) is rotatably connected to the support sleeve (61) through the transmission component (5).

2. The lawnmower head according to claim 1, characterized in that: The first anti-tangle sleeve (3) is disposed on the inner side of the protective cover (2); the first anti-tangle sleeve (3) includes an anti-tangle side plate (31), one end of which is connected to the inner wall of the protective cover (2) and extends axially along the cutter shaft (1); the second anti-tangle sleeve (4) includes an anti-tangle base plate (41) and an anti-tangle side plate (42), the anti-tangle base plate (41) is disposed on the outer periphery of the cutter shaft (1) and connected to the cutter shaft (1), the second anti-tangle side plate (42) is disposed on the side of the anti-tangle base plate (41) near the transmission component (5) and connected to the anti-tangle base plate (41), the second anti-tangle side plate (42) extends axially along the cutter shaft (1); the axial extension direction of the first anti-tangle sleeve (3) is opposite to the axial extension direction of the second anti-tangle sleeve (4).

3. The lawnmower head according to claim 2, characterized in that: The anti-tangling sleeve (3) is an annular sleeve, the length of the anti-tangling sleeve (3) is 20-50mm, and the thickness of the anti-tangling sleeve (3) is 1-20mm.

4. The lawnmower head according to claim 2, characterized in that: The end of the cutter shaft (1) is provided with a mounting platform (11). The anti-tangle base plate (41) and the second anti-tangle side plate (42) form an anti-tangle groove (43) around the mounting platform (11) of the cutter shaft (1). One end of the support sleeve (61) extends into the anti-tangle groove (43). The anti-tangle base plate (41) is an annular plate, the second anti-tangle side plate (42) is an annular sleeve, the anti-tangle groove (43) is an annular groove, and the mounting platform (11) is an annular platform. The groove width of the anti-tangle groove (43) is 2-8mm, and the groove depth of the anti-tangle groove (43) is 2-10mm.

5. The lawnmower head according to claim 2, characterized in that: The cutter shaft (1) passes through the center of the anti-tangle sleeve (3) and the side wall of the protective cover (2) at both ends; the anti-tangle side plate (31) is sleeved on the outside of the anti-tangle side plate (42), and the gap between the anti-tangle side plate (31) and the anti-tangle side plate (42) is less than 30mm; the vertical distance from the anti-tangle bottom plate (41) to the end of the anti-tangle side plate (31) away from the protective cover (2) is 20-40mm.

6. The lawnmower head according to claim 1, characterized in that: The protective cover (2) is provided with an installation groove (21), and an installation plate (22) is provided on one side of the installation groove (21). The installation plate (22) is provided with an installation hole (221). The installation plate (22) is located inside the protective cover (2) and is detachably connected to the protective cover (2). The anti-tangling sleeve (3) is connected to the installation plate (22). The anti-tangling sleeve (3) is connected to the installation hole (221) and the installation groove (21). The installation groove (21) is an annular groove and a straight groove. The straight groove extends to the bottom of the side wall. The installation hole (221) is an annular hole. The diameter of the annular groove of the installation groove (21) is larger than the diameter of the installation hole (221).

7. The lawnmower head according to claim 6, characterized in that: The support sleeve (61) is provided with a connecting plate (62), the connecting plate (62) is provided with a first connecting hole (621), the protective cover (2) is provided with a second connecting hole (23), and locking bolts are provided in the first connecting hole (621) and the second connecting hole (23); the support sleeve (61) is an annular sleeve.

8. The lawnmower head according to claim 7, characterized in that: The mounting plate (22) extends along the straight groove to the bottom of the side wall of the protective cover (2). A discharge channel (7) is provided between the connecting plate (62) and the mounting plate (22). The discharge channel (7) is connected to the anti-tangling sleeve (3). The width of the mounting plate (22) is wider than the width of the mounting groove (21).

9. The lawnmower head according to claim 1, characterized in that: The transmission component (5) is a bearing, and the transmission component (5) is located on the outside of the protective cover (2); a retaining platform (63) is provided inside the support sleeve (61), and the height of the retaining platform (63) does not exceed the height of the outer ring of the bearing; a limiting platform (12) is provided on the cutter shaft (1), and the limiting platform (12) is located inside the support sleeve (61), and the height of the limiting platform (12) is lower than the height of the inner ring of the bearing; the diameter of the cutter shaft (1) located inside the support sleeve (61) is smaller than the diameter of the middle part of the cutter shaft (1), and the bearing is located between the retaining platform (63) and the limiting platform (12); the retaining platform (63) is an annular platform, and the limiting platform (12) is an annular platform.

10. The lawnmower head according to claim 1, characterized in that: The blade shaft (1) is provided with a plurality of grass-chopping blades (8), which are located inside the protective cover (2); one end of the blade shaft (1) is provided with a connecting cavity (13), which is connected to the drive mechanism.

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