Mower mechanical head and mower

Abstract

The utility model discloses a mower mechanical head which comprises a mowing protective cover, a mowing device is arranged in the mowing protective cover, a power transmission box is arranged on the mowing protective cover, a power transmission mechanism is arranged in the power transmission box, and the power transmission mechanism is in transmission connection with the mowing device. The power transmission mechanism is arranged in the power transmission box, so that the mower gearbox can be directly connected with the power transmission mechanism, a mowing device is directly driven, the situations of slipping and abrasion easily occurring in the belt transmission or chain transmission process are avoided, the transmission effect is improved, the working efficiency is improved, and the continuous working time is long.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery, specifically relating to a lawnmower mechanical head and a lawnmower. Background Technology

[0002] In response to the requirements of high-standard farmland construction, farmers are prohibited from spraying pesticides. Weeds are prone to grow in May and June. If manual weeding is used, it will be troublesome for farmers. If farmers have to buy a special lawnmower to remove weeds, the planting cost for farmers will increase significantly.

[0003] In field management, farmers have purchased a variety of agricultural machinery to deal with problems in the fields. Therefore, farmers can purchase grass cutting heads for use on the gearboxes of other agricultural machinery, which can greatly reduce planting costs.

[0004] In addition, when existing lawnmowers are mowing, the engine output shaft simultaneously drives the dedicated gearbox to drive the walking mechanism, and then drives the mowing mechanism through the engine output shaft. This results in the engine output end being subjected to two forces in different directions, making the engine output shaft prone to breakage.

[0005] To address this, our company has developed a lawnmower mechanical head that can be directly driven by a gearbox. Utility Model Content

[0006] To address the aforementioned problems, this utility model designs a lawnmower mechanical head, including a lawnmower protective cover, a lawnmower device installed inside the lawnmower protective cover, a power transmission box installed on the lawnmower protective cover, a power transmission mechanism installed inside the power transmission box, the power transmission mechanism being connected to the lawnmower device, the power input end of the power transmission mechanism being located in the middle of the lawnmower protective cover, and the power transmission box being a housing.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: By adding a power transmission box to the mowing guard and setting a power transmission mechanism inside the power transmission box, the mechanical head of the mower can be connected to the gearbox of other agricultural machinery. The power input end of the power transmission mechanism is located in the middle of the mowing guard, which can ensure that the power of the gearbox of other agricultural machinery is transmitted to the power transmission mechanism. This avoids farmers from having to buy a separate dedicated mower to cut grass when removing weeds, greatly reducing the farmers' planting costs. By connecting the power transmission mechanism to the gearbox, the situation of the engine breaking due to being subjected to forces in two different directions can be avoided.

[0008] By incorporating a power transmission mechanism within the power transmission box, the lawnmower's gearbox can be directly connected to the power transmission mechanism, thereby directly driving the mowing device. This avoids slippage and wear that can easily occur during belt or chain transmission, improving transmission efficiency, increasing work efficiency, and allowing for longer continuous working time and better environmental adaptability.

[0009] Furthermore, the power transmission mechanism includes a first power transmission shaft and a second power transmission shaft. The first power transmission shaft is located in the middle of the rear end of the lawn mower protective cover. The first power transmission shaft and the second power transmission shaft are connected in a transmission manner. One end of the first power transmission shaft is provided with a first transmission gear, and the other end of the first power transmission shaft passes through the power transmission box and is connected in a transmission manner to the gearbox. One end of the second power transmission shaft is provided with a second transmission gear. The first transmission gear and the second transmission gear mesh, and the other end of the second power transmission shaft is connected in a transmission manner to the lawn mower device.

[0010] Preferably, the first transmission gear and the second transmission gear are bevel gears.

[0011] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the power transmission shaft one and the power transmission shaft two are connected by a transmission. The power transmission shaft one is located in the middle of the rear end of the mowing guard, so that the power transmitted from the gearbox is transmitted to the power transmission shaft two through the power transmission shaft one, and then transmitted to the mowing device through the power transmission shaft two, ensuring the stability of the power transmission of the gearbox. The transmission gear one and the transmission gear two are bevel gears, so that the power of the gearbox can be easily turned and then driven to rotate the mowing device, which is conducive to the transmission of the gearbox output power to the mechanical head of the mower.

[0012] Furthermore, the power transmission box includes a first box and a second box, which are detachably connected. The first box has a first retaining channel, and the first power transmission shaft passes through the first retaining channel. The second box has a second retaining channel and a first power transmission channel, and the second power transmission shaft passes through the second retaining channel. The first retaining channel is connected to the first power transmission channel and the second retaining channel. The first transmission gear and the second transmission gear are disposed in the first power transmission channel.

[0013] Preferably, the first clamping channel and the second clamping channel are arranged perpendicularly, and the first power transmission shaft and the second power transmission shaft are arranged perpendicularly.

[0014] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the detachable connection between the first and second housings facilitates the installation of power transmission shaft one and power transmission shaft two; the power transmission shaft one is installed through the clamping channel one, and the power transmission shaft two is installed through the clamping channel two, thereby supporting the power transmission shaft one and power transmission shaft two, thus realizing the meshing of transmission gear one and transmission gear two; the clamping channel one and clamping channel two are set perpendicularly, and the power transmission shaft one and power transmission shaft two are set perpendicularly, thus facilitating the conversion of power between the power transmission shaft one and power transmission shaft two within the power transmission channel one, ensuring stable power transmission.

[0015] Furthermore, the mowing device includes a blade disc, on which a plurality of blade shafts are provided, and on which a plurality of mowing blades are provided, and on which the mowing protective cover is provided a bearing, the blade disc is rotatably connected to the bearing, and a belt transmission mechanism is provided between the blade disc and the second power transmission shaft.

[0016] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the cutter head drives several cutter shafts to rotate, and the power transmission shaft two drives the cutter head to rotate through the belt transmission mechanism, so that the power is stably transmitted to the cutter shafts, which can drive the grass cutter to shred grass efficiently.

[0017] Furthermore, a power connection seat is provided on the first housing, and the power connection seat is located in the middle of the lawn mower protective cover.

[0018] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by setting the power connection seat in the middle of the mowing guard, the power connection between the gearbox and the power connection seat can be guaranteed, and the power of the gearbox can be stably transmitted to the cutter shaft.

[0019] Furthermore, the power transmission mechanism includes a power transmission shaft three, which is located in the middle of the rear end of the lawn mower protective cover. A transmission gear three is provided at one end of the power transmission shaft three. The lawn mower device includes a blade shaft, on which a transmission gear four is provided. The transmission gear three meshes with the transmission gear four.

[0020] Preferably, the third and fourth transmission gears are bevel gears.

[0021] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the transmission gear three of the power transmission shaft three drives the transmission gear four of the cutter shaft to rotate, thereby stably transmitting the power of the gearbox to the cutter shaft through the power transmission mechanism. Since the power transmission shaft three is set in the middle of the grass cutting protective cover, it can ensure that the power of the gearbox is stably transmitted to the grass cutting device.

[0022] Furthermore, the power transmission box includes a third box and a fourth box, which are detachably connected. The third box has a third retaining channel, and the third power transmission shaft passes through the retaining channel and the lawnmower guard to be connected to the gearbox. The second box has a fourth retaining channel and a second power transmission channel, and the blade shaft passes through the fourth retaining channel and the second power transmission channel. The third retaining channel is connected to the second and fourth power transmission channels. The third transmission gear and the fourth transmission gear are located in the second power transmission channel. The third box is detachably connected to the lawnmower guard.

[0023] Preferably, the second power transmission channel is provided with sealing oil;

[0024] Preferably, the cutter shaft is perpendicular to the power transmission shaft.

[0025] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the third housing and the fourth housing are detachably connected, and the third housing is detachably connected to the mowing guard, which facilitates the installation of the power transmission shaft three. By passing through the clamping channel three and the mowing guard to drive the gearbox, and by passing through the clamping channel four and the power transmission channel two, the power transmission shaft three and the cutter shaft are supported, ensuring stable transmission between the transmission gear three and the transmission gear four in the power transmission channel two. By setting sealing oil in the power transmission channel two, the friction between the transmission gear three and the transmission gear four during the transmission meshing process can be reduced, and the heat generated by the friction between the transmission gear three and the transmission gear four can be cooled. By setting the cutter shaft perpendicular to the power transmission shaft three, the power of the gearbox is stably transmitted to the cutter shaft.

[0026] Furthermore, the lawn mowing protective cover is equipped with a bearing, the blade shaft is rotatably mounted inside the bearing, the blade shaft is equipped with a plurality of lawn mowing blades, and the blade shaft is perpendicular to the power transmission shaft.

[0027] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by rotating the blade shaft on the bearing on the mowing guard, and setting the blade shaft perpendicular to the power transmission shaft, the power is stably transmitted to the blade shaft, driving the mowing blade to perform efficient mowing.

[0028] Furthermore, a support wheel rod is provided at the end of the lawn mower protective cover away from the power transmission mechanism, the surface of the support wheel rod is provided with a support wheel adjustment screw, and a support wheel is provided at the bottom end of the support wheel rod.

[0029] The beneficial effects of adopting the above-mentioned further technical solution are as follows: a support wheel is provided on the support wheel rod at the end of the lawn mower protective cover away from the power transmission mechanism, thereby ensuring the stability of the lawn mower during the mowing process. By setting the support wheel adjustment screw, the height of the lawn mower protective cover can be adjusted, which can ensure the stable transmission of power of the lawn mower.

[0030] A lawnmower includes a lawnmower head, a gearbox, and an engine. The power transmission mechanism is driven to the gearbox, the gearbox is driven to a walking mechanism, the gearbox is driven to the engine, and a handle is provided on the gearbox.

[0031] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by connecting the gearbox with the mechanical head of the lawnmower, the mechanical head of the lawnmower can perform grass-cutting work. It can be applied to ordinary gearboxes of other agricultural machinery, avoiding the need for farmers to purchase a separate dedicated lawnmower for weeding, greatly reducing the farmers' planting costs, and at the same time avoiding the situation where the engine breaks due to forces from two different directions; by driving the gearbox through the engine, the gearbox drives the walking mechanism to move and the mechanical head of the lawnmower to perform grass-cutting work. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the mechanical head structure of a lawnmower in Example 1. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the cooperation structure between the power transmission box and the power transmission mechanism in Embodiment 1. Figure 2 ;

[0034] Figure 3 This is a schematic diagram of the mechanical head structure of the lawnmower in Example 2. Figure 1 ;

[0035] Figure 4 This is a schematic diagram of the cooperation structure between the power transmission box and the power transmission mechanism in Embodiment 2. Figure 2 ;

[0036] Figure 5 This is a schematic diagram of the support wheel structure;

[0037] Figure 6 This is a schematic diagram of a lawnmower.

[0038] The diagram shows the following markings: 1. Lawn mower guard; 11. Bearing; 2. Mowing device; 21. Blade disc; 22. Blade shaft; 221. Mowing blade; 222. Transmission gear four; 3. Power transmission box; 31. First box; 311. Holding channel one; 32. Second box; 321. Holding channel two; 322. Power transmission channel one; 33. Third box; 331. Holding channel three; 34. Fourth box; 341. Holding channel four; 342. Power transmission channel two; 4. Power transmission mechanism; 41. Power transmission shaft one; 411. Transmission gear one; 42. Power transmission shaft two; 421. Transmission gear two; 43. Power transmission shaft three; 431. Transmission gear three; 5. Belt transmission mechanism; 6. Support wheel rod; 61. Support wheel adjusting screw; 62. Support wheel; 7. Gearbox; 8. Engine; 9. Walking mechanism; 10. Handle. Detailed Implementation

[0039] 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.

[0040] This embodiment provides Example 1.

[0041] Please see Figure 1-2 5-6, a lawnmower mechanical head includes a mowing guard 1, a mowing device 2 disposed inside the mowing guard 1, a power transmission box 3 disposed on the mowing guard 1, and a power transmission mechanism 4 disposed inside the power transmission box 3. The power transmission mechanism 4 is connected to the mowing device 2, and the power input end of the power transmission mechanism 4 is located in the middle of the mowing guard 1. The power transmission box 3 is a housing. By adding a power transmission box 3 to the mowing guard 1 and setting a power transmission mechanism 4 inside the power transmission box 3, the lawnmower mechanical head can be connected to the gearbox of other agricultural machinery. The power input end of the power transmission mechanism 4 is located in the middle of the mowing guard 1, ensuring that the power from the gearbox of other agricultural machinery is transmitted to the power transmission mechanism 4. This avoids farmers from having to purchase a separate dedicated lawnmower for weeding, greatly reducing farmers' planting costs. Furthermore, the connection between the power transmission mechanism 4 and the gearbox prevents the engine from breaking due to forces from two different directions.

[0042] The power transmission mechanism 4 includes a first power transmission shaft 41 and a second power transmission shaft 42. The first power transmission shaft 41 is located in the middle of the lawn mower protective cover 1. The first power transmission shaft 41 and the second power transmission shaft 42 are connected in a driving manner. One end of the first power transmission shaft 41 is provided with a first transmission gear 411. The other end of the first power transmission shaft 41 passes through the power transmission box 3 and is connected in a driving manner to the gearbox. One end of the second power transmission shaft 42 is provided with a second transmission gear 421. The first transmission gear 411 and the second transmission gear 421 mesh. The other end of the second power transmission shaft 42 is connected in a driving manner to the lawn mower 2. Preferably, the first transmission gear 411 and the second transmission gear 421 are bevel gears. The transmission is connected by a power transmission shaft 41 and a power transmission shaft 42. The power transmission shaft 41 is located in the middle of the rear end of the mower guard 1, so that the power transmitted from the gearbox is transmitted to the power transmission shaft 42 through the power transmission shaft 41, and then transmitted to the mower device 2 through the power transmission shaft 42. This ensures the stability of the power transmission from the gearbox. The transmission gears 411 and 421 are bevel gears, which makes it easy to turn the power of the gearbox to drive the mower device 2 to rotate, which is beneficial to the transmission of the gearbox output power to the mechanical head of the mower.

[0043] The power transmission box 3 includes a first box body 31 and a second box body 32, which are detachably connected. The first box body 31 is provided with a first retaining channel 311, and a first power transmission shaft 41 is disposed through the first retaining channel 311. The second box body 32 is provided with a second retaining channel 321 and a first power transmission channel 322, and a second power transmission shaft 42 is disposed through the second retaining channel 321. The first retaining channel 311 is connected to the first power transmission channel 322 and the second retaining channel 321. The first transmission gear 411 and the second transmission gear 421 are disposed in the first power transmission channel 322. Preferably, the first retaining channel 311 and the second retaining channel 321 are arranged perpendicularly, and the first power transmission shaft 41 and the second power transmission shaft 42 are arranged perpendicularly. The first housing 31 and the second housing 32 are detachably connected, facilitating the installation of power transmission shaft 1 41 and power transmission shaft 2 42. Power transmission shaft 1 41 is inserted through the first holding channel 311, and power transmission shaft 2 42 is inserted through the second holding channel 321, thus supporting power transmission shaft 1 41 and power transmission shaft 2 42 and enabling the meshing of transmission gear 1 411 and transmission gear 2 421. The first holding channel 311 and the second holding channel 321 are vertically arranged, and the first power transmission shaft 41 and the second power transmission shaft 2 are vertically arranged, facilitating the conversion of power within the first power transmission channel 322 and ensuring stable power transmission.

[0044] The mowing device 2 includes a blade disc 21, on which a plurality of blade shafts 22 are mounted, and on each blade shaft 22 a plurality of mowing blades 221 are mounted. A bearing 11 is mounted on the mowing protective cover 1. The blade disc 21 is rotatably connected to the bearing 11. A belt transmission mechanism 5 is provided between the blade disc 21 and the power transmission shaft 42. The blade disc 21 drives the plurality of blade shafts 22 to rotate, and the power transmission shaft 42, through the belt transmission mechanism 5, drives the blade disc 21 to rotate, ensuring stable power transmission to the blade shafts 22, thereby enabling the mowing blades 221 to efficiently shred the grass.

[0045] The first housing is equipped with a power connector, which is located in the middle of the mowing guard. Positioning the power connector in the middle of the mowing guard ensures a stable power connection between the gearbox and the power connector, guaranteeing a reliable power transmission from the gearbox to the cutter shaft.

[0046] The lawn mower protective cover 1 is provided with a support wheel 62 rod 6 at the end away from the power transmission mechanism 4. The surface of the support wheel 62 rod 6 is provided with a support wheel 62 adjusting screw 61, and the bottom end of the support wheel 62 rod 6 is provided with a support wheel 62.

[0047] A support wheel 62 is provided at the end of the lawn mower cover 1 away from the power transmission mechanism 4. The support wheel 62 is provided on the rod 6 to ensure the stability of the lawn mower during the mowing process. By setting the support wheel 62 and adjusting the screw 61, the height of the lawn mower cover 1 can be adjusted to ensure the stable transmission of power of the lawn mower.

[0048] A lawnmower includes a mower head, a gearbox 7, and an engine 8. A power transmission mechanism 4 is driven by the gearbox 7, which in turn is driven by a walking mechanism 9. The gearbox 7 is also driven by the engine 8. A handle 10 is provided on the gearbox 7. The gearbox 7's connection to the mower head enables the mower head to perform mowing operations. This design allows the gearbox 7 to be used with ordinary gearboxes from other agricultural machinery, eliminating the need for farmers to purchase a separate dedicated lawnmower for weeding, significantly reducing their planting costs. It also prevents the engine 8 from breaking due to forces from two different directions. The engine 8 drives the gearbox 7, which in turn drives the walking mechanism 9 to move and the mower head to perform mowing operations.

[0049] This embodiment provides Example 2.

[0050] Please see Figure 3-4 ,

[0051] The power transmission mechanism 4 includes a power transmission shaft 43, which is located in the middle of the rear end of the lawnmower cover 1. One end of the power transmission shaft 43 has a transmission gear 431. The lawnmower device 2 includes a blade shaft 22, on which a transmission gear 222 is mounted. The transmission gear 431 meshes with the transmission gear 222. Preferably, the transmission gear 431 and the transmission gear 222 are bevel gears. The transmission gear 431 of the power transmission shaft 43 drives the transmission gear 222 of the blade shaft 22 to rotate, thereby stably transmitting the power from the gearbox to the blade shaft 22 through the power transmission mechanism 4. The fact that the power transmission shaft 43 is located in the middle of the rear end of the lawnmower cover 1 ensures stable power transmission from the gearbox 7 to the lawnmower device 2.

[0052] The power transmission box 3 includes a third box 33 and a fourth box 34, which are detachably connected. The third box 33 has a third retaining channel 331. The third power transmission shaft 43 passes through the third retaining channel 331 and the lawnmower guard 1, and is connected to the gearbox. The second box 32 has a fourth retaining channel 341 and a second power transmission channel 342. The cutter shaft 22 passes through the fourth retaining channel 341 and the second power transmission channel 342. The third retaining channel 331 communicates with the second and fourth power transmission channels 342 and 341. The third transmission gear 431 and the fourth transmission gear 222 are located within the second power transmission channel 342. The third box 33 is detachably connected to the lawnmower guard 1. Preferably, the second power transmission channel 342 contains sealing oil. More preferably, the cutter shaft 22 is perpendicular to the third power transmission shaft 43. The third housing 33 and the fourth detachable connection facilitate the installation of the power transmission shaft 43. The power transmission shaft 43 is connected to the gearbox via the third holding channel 331 and the grass-cutting guard 1. The cutter shaft 22 is connected to the gearbox via the fourth holding channel 341 and the second power transmission channel 342, thus supporting the power transmission shaft 43 and the cutter shaft 22. This ensures stable transmission of the gears 431 and 222 within the second power transmission channel 342. By providing sealing oil within the second power transmission channel 342, the friction between the gears 431 and 222 during meshing is reduced, and the heat generated by the friction between the gears 431 and 222 is cooled. The cutter shaft 22 is perpendicular to the power transmission shaft 43, ensuring stable power transmission from the gearbox 7 to the cutter shaft 22.

[0053] The lawnmower cover 1 is equipped with a bearing 11, and the blade shaft 22 is rotatably mounted within the bearing 11. The blade shaft 22 is equipped with a plurality of mowing blades 221, and is perpendicular to the power transmission shaft 43. By rotatably mounting the blade shaft 22 on the bearing 11 in the lawnmower cover 1, and by perpendicularly mounting the blade shaft 22 to the power transmission shaft 43, stable power transmission to the blade shaft 22 is ensured, driving the mowing blades 221 to perform efficient mowing.

[0054] 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 mower head, characterised in that: The application relates to a mowing protective cover (1) provided with a mowing device (2), a power transmission box (3) arranged on the mowing protective cover (1), a power transmission mechanism (4) arranged in the power transmission box (3), and a power input end of the power transmission mechanism (4) arranged at the middle of the mowing protective cover (1).

2. The lawn mower mechanical head of claim 1, wherein: The power transmission mechanism (4) comprises a power transmission shaft one (41) and a power transmission shaft two (42), the power transmission shaft one (41) is arranged at the middle of the rear end of the mowing protective cover (1), the power transmission shaft one (41) and the power transmission shaft two (42) are in transmission connection, one end of the power transmission shaft one (41) is provided with a transmission gear one (411), the other end of the power transmission shaft one (41) penetrates through the power transmission box (3), one end of the power transmission shaft two (42) is provided with a transmission gear two (421), the transmission gear one (411) and the transmission gear two (421) are in meshing, and the other end of the power transmission shaft two (42) is in transmission connection with the mowing device (2).

3. The lawn mower mechanical head of claim 2, wherein: The transmission gear one (411) and the transmission gear two (421) are bevel gears.

4. The lawn mower mechanical head of claim 2, wherein: The power transmission box (3) comprises a first box body (31) and a second box body (32), the first box body (31) and the second box body (32) are detachably connected, the first box body (31) is provided with a clamping channel one (311), the power transmission shaft one (41) penetrates through the clamping channel one (311), the second box body (32) is provided with a clamping channel two (321) and a power transmission channel one (322), the power transmission shaft two (42) penetrates through the clamping channel two (321), the clamping channel one (311) is in communication with the power transmission channel one (322) and the clamping channel two (321), and the transmission gear one (411) and the transmission gear two (421) are arranged in the power transmission channel one (322).

5. The lawn mower mechanical head of claim 4, wherein: The clamping channel one (311) and the clamping channel two (321) are vertically arranged, and the power transmission shaft one (41) and the power transmission shaft two (42) are vertically arranged.

6. The lawn mower mechanical head of claim 1 or 4, wherein: The mowing device (2) comprises a cutter head (21), a plurality of cutter shafts (22) are arranged on the cutter head (21), a plurality of mowing knives (221) are arranged on the cutter shafts (22), bearings (11) are arranged on the mowing protective cover (1), the cutter head (21) is in rotary connection with the bearings (11), and a belt transmission mechanism (5) is arranged between the cutter head (21) and the power transmission shaft two (42).

7. The lawn mower mechanical head of claim 4, wherein: The first box body (31) is provided with a power connecting seat (312), and the power connecting seat (312) is arranged at the middle of the mowing protective cover (1).

8. The lawn mower mechanical head of claim 1, wherein: The power transmission mechanism (4) comprises a power transmission shaft three (43), the power transmission shaft three (43) is arranged at the middle of the rear end of the mower protective cover (1), one end of the power transmission shaft three (43) is provided with a transmission gear three (431), the mower device (2) comprises a cutter shaft (22), the cutter shaft (22) is provided with a transmission gear four (222), the transmission gear three (431) is engaged with the transmission gear four (222).

9. The lawnmower mechanical head of claim 8, wherein: The transmission gear three (431) and the transmission gear four (222) are bevel gears.

10. The lawn mower mechanical head of claim 8, wherein: The power transmission box (3) comprises a third box body (33) and a fourth box body (34), the third box body (33) and the fourth box body (34) are detachably connected, the third box body (33) is provided with a clamping channel three (331), the power transmission shaft three (43) penetrates the clamping channel three (331) and the mower protective cover (1), the fourth box body (34) is provided with a clamping channel four (341) and a power transmission channel two (342), the cutter shaft (22) penetrates the clamping channel four (341) and the power transmission channel two (342), the clamping channel three (331) is in communication with the power transmission channel two (342) and the clamping channel four (341), the transmission gear three (431) and the transmission gear four (222) are arranged in the power transmission channel two (342), and the third box body (33) is detachably connected with the mower protective cover (1).

11. The lawn mower mechanical head of claim 10, wherein: The power transmission channel two (342) is provided with sealing oil.

12. The lawn mower mechanical head of claim 11, wherein: The cutter shaft (22) and the power transmission shaft three (43) are arranged vertically.

13. The lawn mower mechanical head of claim 10, wherein: The side, away from the power transmission box, of the mower protective cover (1) is provided with a power connection seat, the power transmission shaft three (43) penetrates the power connection seat, and the power connection seat is arranged at the middle of the mower protective cover.

14. The lawn mower mechanical head of claim 8, wherein: The mower protective cover (1) is provided with a bearing (11), the cutter shaft (22) is rotatably arranged in the bearing (11), and the cutter shaft (22) is provided with a plurality of mower knives (221).

15. A lawnmower characterised in that: The mower comprises the mower mechanical head, a gearbox (7) and an engine (8) as claimed in claims 1-14, the power transmission mechanism (4) is in transmission connection with the gearbox (7), the gearbox (7) is in transmission connection with a walking mechanism (9), the gearbox (7) is in transmission connection with the engine (8), and the gearbox (7) is provided with a handle (10).

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