Lawn mower

Abstract

The grass mower comprises a power device and a grass mowing device, the power device comprises a machine base, the grass mowing device comprises a tool apron, and the tool apron is detachably connected with the machine base; a first locking device used for fixing the tool apron is arranged on the machine base and comprises a first installation rod, a first plug pin and a first locking mechanism. The first mounting rod is arranged on the machine base, the end of the first mounting rod abuts against the side wall of the tool apron, a first inserting hole is formed in the end of the first mounting rod, a through avoiding groove is formed in the tool apron, and the first plug pin sequentially penetrates through the avoiding groove and the first inserting hole; the first locking mechanism is arranged on the first mounting rod and used for fixing the first plug pin.

Description

Technical Field

[0001] The present application relates to the field of lawn mowing equipment, and in particular to a lawn mower. Background Art

[0002] As a core tool for garden maintenance, lawn mowers play a vital role in lawn mowing and garden landscape maintenance. However, with the evolution of technology and the increasing requirements of users for lawn mower performance, the performance of lawn mowers is also constantly evolving, striving to achieve breakthroughs in ease of operation, mowing efficiency and safety of use.

[0003] Most lawn mowers in the related art rely on bolts to fix various devices, mechanisms or parts. When a device, mechanism or part needs to be disassembled separately, the operator must use tools to disassemble it each time, which not only increases the time cost of finding tools, but also brings additional operation steps. At the same time, since these devices, mechanisms or parts are usually fixed by multiple bolts, and the number of bolts is large, each installation or disassembly process is relatively cumbersome and time-consuming. Each installation or disassembly takes at least 5 minutes, and complex structures may even take more than 30 minutes, thereby reducing the maintenance efficiency of the lawn mower. Summary of the invention

[0004] In order to improve the maintenance efficiency and convenience of a lawn mower, the present application provides a lawn mower.

[0005] A lawn mower comprises a power device and a lawn mower device, wherein the power device comprises a machine base, and the lawn mower device comprises a blade holder, wherein the blade holder is detachably connected to the machine base; a first locking device for fixing the blade holder is arranged on the machine base, and the first locking device comprises a first mounting rod, a first latch and a first locking mechanism; the first mounting rod is arranged on the machine base, a first insertion hole is formed at the end of the first mounting rod, a through hole is formed on the blade holder, and the first latch passes through the through hole and the first insertion hole in sequence; the first locking mechanism is arranged on the first mounting rod, and the first locking mechanism is used to fix the first latch.

[0006] With the above solution, when working, the first latch passes through the through hole on the blade holder and the first plug hole on the first mounting rod, and is then fixed by the first locking mechanism, so as to realize the rapid disassembly and assembly of the blade holder and the machine base, thereby realizing the rapid installation and disassembly of the mowing device and the power device. The present application uses the first latch to replace the traditional bolt fixing method, and the cutting device can be manually disassembled without using tools such as wrenches. The disassembly and assembly reduces the use of tools and improves the maintenance efficiency of the lawn mower.

[0007] Optionally, the first locking mechanism includes a first locking rod and a first elastic member, a first sliding hole is provided on the first mounting rod, and the axial direction of the first sliding hole is perpendicular to the axial direction of the first insertion hole; the first locking rod is inserted into the first sliding hole and slidingly cooperates with the first sliding hole, the first elastic member is sleeved on the first locking rod, and the first elastic member is arranged in the first sliding hole; one end of the first elastic member is fixedly connected to the first locking rod, and the other end of the first elastic member is fixedly connected to the inner side wall of the first sliding hole; when the first elastic member is not subjected to external force, the first locking rod abuts against the surface of the first pin under the elastic force of the first elastic member.

[0008] With the above solution, the first locking rod slides in the first sliding hole, and cooperates with the elastic force of the first elastic member to effectively fix and release the first latch. When the first latch is inserted into place, the first locking rod clamps the first latch under the push of the first elastic member to prevent it from falling off, thereby firmly connecting the knife seat and the machine base. When the connection between the knife seat and the machine base needs to be disassembled, the user only needs to overcome the elastic force of the first elastic member and move the first locking rod to release the first latch. This step can usually be completed within 0-5 seconds.

[0009] Optionally, a first positioning groove is formed on the outer side wall of the first latch, and when the first latch is not subjected to external force, the elastic force of the first elastic member drives the end of the first locking rod to abut against the bottom of the first positioning groove.

[0010] With the above solution, the first positioning groove on the first latch and the end of the first locking rod cooperate with each other, and under the elastic force of the first elastic member, the end of the first locking rod can stably abut against the bottom of the first positioning groove, thereby firmly locking the first latch. The stability of the connection is enhanced, the first latch is prevented from accidentally falling off under vibration or external force, the reliable connection between the blade seat and the machine seat is ensured, and the safety and durability of the lawn mower are improved.

[0011] Optionally, a first connecting device is provided between the machine base and the first locking device, and the first locking device realizes left-right swinging through the first connecting device; the first connecting device includes at least two connecting rods, one end of the connecting rod is rotatably connected to the machine base, and the other end of the connecting rod is rotatably connected to the first mounting rod.

[0012] With the above solution, when the lawn mower is moving forward and there is a height difference or slope in the left and right directions of the ground, the blade seat can be fine-tuned within the above-mentioned limited rotation angle; this fine-tuning capability enables the lawn mower to better adapt to various lawn mowing needs, whether uphill or downhill, to maintain high work efficiency and convenient operation. The first connecting device is implemented by at least two connecting rods, allowing the first locking device to swing to a certain extent relative to the machine seat when there is a height difference or slope in the left and right directions of the ground during the lawn mower's forward movement, which helps to maintain stable contact between the lawn mower and the ground and reduce the impact of terrain changes on the stability of the lawn mower's operation.

[0013] Optionally, a second connecting device is provided between the first locking device and the knife holder, and the knife holder is swung in the front-rear direction through the second connecting device.

[0014] With the above solution, when faced with changes in slope, the blade holder can be fine-tuned within a limited rotation angle, so that the mowing device can better adapt to diverse mowing needs, and can maintain high work efficiency and ease of operation whether uphill or downhill.

[0015] Optionally, the second connecting device includes at least one connecting block, the tool holder includes a top tool holder, the top tool holder is rotatably connected to the connecting block, and the through hole is provided on the connecting block; the first mounting rod is provided with an assembly groove for positioning the connecting block, and one side of the assembly groove is open; when the connecting block is installed in the assembly groove, the side wall of the connecting block abuts against the inner side wall of the assembly groove, and the axis of the first socket coincides with the axis of the through hole.

[0016] With the above solution, since one side of the assembly groove is open, it is convenient for the connection block to be quickly aligned and inserted; when the connection block is fully installed in the assembly groove, its side wall is tightly abutted against the inner side wall of the assembly groove, ensuring a stable connection between the knife seat and the machine base. At the same time, the first latch passes through the through hole and the first plug hole, and is firmly locked by the first elastic locking mechanism, thereby enhancing the stability and safety of the connection. The assembly and disassembly process of the mowing device is simplified, and the maintenance efficiency is improved.

[0017] Optionally, a limiting mechanism is provided on the tool holder, and the limiting mechanism includes two limiting members, both of which are provided on the tool holder, and the two limiting members are respectively located on two opposite sides of the tool holder, and when the tool holder rotates, the side wall of the tool holder will contact the inner wall of the limiting member, and the two limiting members are used to limit the rotation angle of the tool holder.

[0018] With the above scheme, firstly, the connecting block is firmly fixed on the first mounting rod through the action of the first locking mechanism, and the two limit members arranged on the blade holder are respectively located on both sides of the connecting block, and the two limit members limit the rotation angle of the blade holder relative to the first mounting rod within the range of 0 to 30 degrees, thereby ensuring the stability of the lawn mowing device during operation and avoiding operational loss of control or damage caused by excessive rotation; when facing changes in slope, the blade holder can be fine-tuned within the limited rotation angle, so that the lawn mowing device can better adapt to diverse lawn mowing needs, whether uphill or downhill, it can maintain high working efficiency and operational convenience.

[0019] Optionally, the top tool holder includes a connecting member and at least one end plate, and the end of the connecting member is detachably connected to the end plate; a avoidance groove is provided on one side of the end plate, and the avoidance groove is opened toward one side of the edge of the end plate.

[0020] With the above scheme, since the end plate in the related art has a through circular hole, square hole or elliptical hole, in the process of disassembling the end plate, it is necessary to first disassemble the parts outside the end plate before disassembling the end plate. Therefore, both the installation process and the disassembly process generally take more than 30 minutes or more than 1 hour. However, one side of the through hole on the end plate in the present application is open. Therefore, whether it is the installation process or the disassembly process of the end plate, it is not necessary to disassemble the parts on the outside of the end plate. Only the end plate needs to be disassembled without disassembling other parts. Generally, it only takes about 5 minutes, which improves maintenance efficiency.

[0021] Optionally, the grass cutting device further comprises a first grass cutting mechanism, which comprises a grass cutting motor and a roller cutter, wherein the roller cutter is rotatably arranged on the cutter seat, the grass cutting motor is detachably connected to the cutter seat, and the output shaft of the grass cutting motor is fixedly connected to the end of the roller cutter.

[0022] With the above solution, the first mowing mechanism enables the mowing motor to be detachably connected to the cutter seat, and its output shaft is directly fixedly connected to the reel to drive the reel to rotate for mowing operations. This facilitates the maintenance and replacement of the mowing motor and ensures that the reel can obtain stable and powerful power, thereby effectively improving the mowing efficiency and quality.

[0023] Optionally, a rotary locking device is provided on the blade holder, and the rotary locking device includes a linkage part and at least one rotary locking part, and the linkage part is connected to the rotary locking part; an arc-shaped locking groove is provided on the rotary locking part; at least one locking column is provided on the lawn mowing motor; when the rotary locking part rotates, the movement trajectory of the locking groove on the rotary locking part will pass through the locking column, and when the rotary locking part rotates to an appropriate position, the locking column will fall into the locking groove, thereby fixing the lawn mowing motor to the blade holder.

[0024] With the above solution, the rotary locking device on the blade holder uses the arc-shaped locking groove on at least one rotary locking member to cooperate with the locking column on the mowing motor. By rotating the locking member, the movement trajectory of the locking groove passes through the locking column, and the locking column falls into the locking groove when in the appropriate position, thereby realizing the rapid fixation of the mowing motor. At the same time, since the shape of the locking groove is a non-standard arc-shaped structure, no matter whether the locking column is fixed on the mowing motor or rotated on the mowing motor, when the mowing motor is locked, the rotary locking member will not rotate easily, thereby increasing the firmness of the rotary locking member fixing the mowing motor. The installation process of the mowing motor is simplified, and a stable connection method is provided, which ensures the stability and safety of the mowing motor when it is running at high speed, and facilitates the disassembly and maintenance of the mowing motor.

[0025] Optionally, a battery mechanism is provided on the base, and the battery mechanism is connected to the lawn mowing motor via a cable, the cable is provided with a flexible sheath on the outside, and the flexible sheath is provided with a hard sheath on the outside, and the hard sheath is detachably connected to the lawn mowing motor; the hard sheath comprises two clamping sleeves, the inner side walls of the two clamping sleeves abut against each other, and two adjacent clamping sleeves are fixed by bolts and nuts; a bearing part is provided on the lawn mowing motor, and a mounting part is fixedly provided on the clamping sleeve, and the lower surface of the mounting part abuts against the upper surface of the bearing part; clamping blocks are provided on the upper surfaces of the two mounting parts located on the same side, and the lower surface of the clamping blocks abuts against the upper surfaces of the two mounting parts at the same time; each of the clamping blocks is provided with a bolt corresponding to the mounting part one by one, and the bolt passes through the mounting part and cooperates with the thread of the bearing part.

[0026] The above solution is adopted. In the related art, since the gasoline engine is used to drive the reel to rotate, it is easy to pollute the environment. The battery mechanism in the present application connects the battery mechanism to the lawn mower motor through a cable. The hard sheath is composed of two detachable clamping sleeves, which are fixed to the bearing part on the lawn mower motor by bolts and nuts, and are firmly installed by the clamping block, protecting the cable from damage and preventing the cable from bending and deformation. It is also easy to install and maintain, ensuring the stability and safety of power transmission, thereby improving the environmental protection of the overall equipment.

[0027] Optionally, the lawn mowing device also includes a second lawn mowing mechanism, which is detachably connected to the lawn mowing device and is located below the first lawn mowing mechanism; the second lawn mowing mechanism includes a bottom blade frame and a bottom blade, the bottom blade frame is detachably connected to the blade seat, the bottom blade is arranged on the bottom blade frame, the upper surface of the bottom blade is inclined, and the bottom of the roller abuts against the upper surface of the bottom blade; a strip-shaped sharpening groove is provided on the upper surface of the bottom blade, and a sharpening flange is provided on the inner side wall of one side of the sharpening groove.

[0028] With the above solution, when the mowing motor drives the reel to rotate in the forward direction (mowing direction), the sharp edge of the reel contacts the upper surface of the bottom blade, and the two work together to achieve the mowing function. At this time, the interaction between the reel and the bottom blade is mainly focused on the transmission of shear force. The inclined upper surface design of the bottom blade helps to guide the grass blades into the shearing area smoothly, while reducing cutting resistance; and when the mowing motor drives the reel to rotate in the opposite direction (sharpening direction), its bottom edge will periodically contact the sharpening flange, which can gradually remove the passivation layer accumulated on the edge of the reel due to long-term use, thereby restoring its sharpness. The bottom blade holder is detachably connected to the blade seat, and the bottom blade is set on the bottom blade holder, which is convenient for the replacement and maintenance of the bottom blade and the bottom blade holder.

[0029] Optionally, a second locking device for fixing the bottom knife holder is provided on the knife seat, and the second locking device includes a second mounting rod, a second pin and a second locking mechanism, the second mounting rod is fixed to the machine seat, and two ends of the second mounting rod respectively abut against the inner side walls of the two connecting blocks, and two ends of the second mounting rod are provided with a second plug hole, and each connecting block is provided with a through-hole penetrating therethrough, and the second pin passes through the through-hole and the second plug hole in sequence to fix the knife seat to the machine seat; the second locking mechanism includes a second locking rod and a second elastic member, the second locking rod is passed through the first sliding hole provided on the second mounting rod and slidably cooperates with the first sliding hole, the second elastic member is sleeved on the second locking rod, one end of the second elastic member is fixedly connected to the second locking rod, and the other end of the second elastic member is fixedly connected to the second mounting rod; when the second elastic member is not subjected to external force, the second locking rod abuts against the surface of the first pin under the elastic force of the second elastic member and the first elastic member.

[0030] By adopting the above scheme, the second mounting rod, the second latch and the second locking mechanism are used to realize a quick and stable connection between the bottom blade holder and the blade seat. The second locking mechanism uses the sliding fit of the second locking rod in the first sliding hole and the elastic force of the second elastic member to realize the effective fixation and release of the second latch. When the second latch is inserted into place, the second locking rod clamps the second latch under the push of the second elastic member, thereby firmly connecting the bottom blade holder and the blade seat; when disassembly is required, it is only necessary to overcome the elastic force of the second elastic member and move the second locking rod to release the second latch, thereby realizing quick disassembly. The disassembly and assembly process of the bottom blade holder is simplified, the stability of the connection and the convenience of disassembly are improved, and the maintenance efficiency and operation convenience of the lawn mower are improved.

[0031] Optionally, it also includes a control device, which includes an armrest, a control mechanism and a control rod. The armrest is detachably connected to the base. The control mechanism is arranged on the armrest and is used to receive operating instructions and control the operation of the power device and the mowing device of the lawn mower. The control rod is rotatably connected to the armrest.

[0032] By adopting the above scheme, the armrest is detachably connected to the base of the lawn mower, and a control mechanism is set on the armrest to receive operating instructions. At the same time, a control lever is provided, and its two ends are rotatably connected to the control mechanism and the armrest respectively, ensuring that the control mechanism will receive the start signal only when the operator holds the armrest and presses the control lever at the same time, and then controls the operation of the power device and the lawn mower, thereby improving the safety of operation. The flexible operation, terrain adaptability and stability of the lawn mower are achieved through the adjustability of the armrest height and the structural reinforcement of the reinforcing rod, effectively improving the lawn mowing efficiency and operating experience.

[0033] Optionally, the power device also includes a roller mechanism and a driving mechanism, the roller mechanism is rotatably connected to the machine base, and the driving mechanism is used to drive the roller mechanism to rotate; the driving mechanism includes a travel motor, and the control device also includes a balancer, and the balancer is electrically connected to the travel motor; when the lawn mower is moving or turning, when the inclination angle of the lawn mower is greater than 10°, the balancer can instantly sense the inclination state of the lawn mower and send a corresponding signal to the travel motor, thereby automatically regulating and slowing down the forward speed of the lawn mower; when the output shaft speed of the travel motor increases or decreases, the output shaft speed of the lawn mower motor correspondingly speeds up or slows down, ensuring that the mowing speed of the lawn mower device is coordinated with the overall forward speed of the lawn mower.

[0034] With the above solution, when the lawn mower is moving or turning, when the lawn mower is moving forward or turning around, when the operator presses the armrest while pressing the control lever, the armrest drives the machine base to rotate, so that the machine base tilts more than 10°, and the balancer can quickly sense and send a signal to the travel motor to automatically adjust and slow down the forward speed of the lawn mower, thereby effectively improving the stability and safety of the lawn mower. When the output shaft speed of the travel motor changes, the output shaft speed of the lawn mower motor can respond immediately and make corresponding adjustments to ensure that the mowing speed of the mowing device is always coordinated with the overall forward speed of the lawn mower. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the lawn mower in Example 1 of the present application.

[0036] Figure 2 It is a schematic diagram of the blade holder, the buffer device and the first mowing mechanism in Example 1 of the present application.

[0037] Figure 3 It is a schematic diagram of the blade holder and the first mowing mechanism in Example 1 of the present application.

[0038] Figure 4 It is a schematic diagram of the first locking device and the second locking device in Example 1 of the present application from another perspective.

[0039] Figure 5 It is a cross-sectional view of the first locking device and the second locking device along the AA direction in Example 1 of the present application.

[0040] Figure 6 It is a schematic diagram of the end plate in Example 1 of the present application.

[0041] Figure 7 It is a schematic diagram of the lawn mower motor and the rotary locking device in Example 1 of the present application.

[0042] Figure 8 It is a schematic diagram of the second mowing mechanism in Example 1 of the present application.

[0043] Fig. 9 yes Figure 8 Enlarged schematic diagram of part A.

[0044] Fig.10 It is a schematic diagram of the lawn mower in Example 2 of the present application.

[0045] Fig.11 It is a schematic diagram of the control device in Example 2 of the present application.

[0046] Description of reference numerals: 1. Power device; 11. Machine base; 111. Mounting cylinder; 12. Roller mechanism; 121. Rotating shaft; 122. Wheel; 13. Driving mechanism; 2. Grass cutting device; 21. Blade holder; 211. Top blade holder; 2111. Connecting piece; 2112. End plate; 2113. Ring seat; 2114. Positioning column; 2115. Through hole; 2116. Avoidance groove; 22. First grass cutting mechanism; 221. Grass cutting motor; 222. Roller; 223, locking column; 224, bearing part; 23, second mowing mechanism; 231, bottom blade frame; 232, bottom blade; 233, sharpening groove; 234, sharpening flange; 24, limiting mechanism; 241, limiting member; 3, control device; 31, handrail; 311, holding rod; 312, connecting rod; 313, reinforcing rod; 32, control mechanism; 33, control rod; 34, mounting seat; 35, holding handle; 4, first locking device; 41, first mounting rod; 411, first plug hole; 412, first sliding hole; 413, assembly groove; 42, first latch; 421, first positioning groove; 43, first locking mechanism; 431, first locking rod; 432, first elastic member; 4 33. First gripping member; 5. Second locking device; 51. Second mounting rod; 511. Second plug hole; 512. Second sliding hole; 52. Second latch; 521. Second positioning groove; 53. Second locking mechanism; 531. Second locking rod; 532. Second elastic member; 533. Second gripping member; 6. Rotary locking device; 61. Linkage member; 62. Rotary locking member; 621. Locking seat; 622. Plug rod; 623. Locking groove; 7. Cable; 71. Flexible sheath; 72. Hard sheath; 721. Clamping sleeve; 722. Mounting part; 73. Clamping block; 8. First connecting device; 81. Connecting rod; 9. Second connecting device; 91. Connecting block; 92. Through hole. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1-11 Describe this application in detail.

[0048] Example 1 The present application embodiment discloses a lawn mower. Figure 1 The lawn mower comprises a power device 1, a grass cutting device 2 and a control device 3. The control device 3 is detachably connected to the power device 1, and the grass cutting device 2 is detachably connected to the power device 1.

[0049] The power device 1 includes a base 11, a roller mechanism 12 and a driving mechanism 13. The roller mechanism 12 includes a rotating shaft 121 and two wheels 122. The rotating shaft 121 passes through the base 11 and is rotatably connected to the base 11. Both ends of the rotating shaft 121 are fixedly connected to the two wheels 122. The driving mechanism 13 is arranged on the base 11, and the driving mechanism 13 is used to drive the rotating shaft 121 to rotate, thereby driving the lawn mower forward. The driving mechanism includes a travel motor and a transmission assembly. The travel motor is arranged on the base 11, and the travel motor is used to drive the transmission assembly to operate, thereby driving the lawn mower forward.

[0050] Reference Figure 2 and Figure 3 The grass cutting device 2 includes a blade seat 21, a first grass cutting mechanism 22 and a second grass cutting mechanism 23. The blade seat 21 is detachably connected to the machine base 11. The first grass cutting mechanism 22 and the second grass cutting mechanism 23 are both arranged on the blade seat 21. The grass cutting function can only be achieved under the cooperation of the first grass cutting mechanism 22 and the second grass cutting mechanism 23.

[0051] A second connecting device 9 is provided between the first locking device 4 and the knife holder 21, and the knife holder 21 is swung in the front-back direction through the second connecting device 9. The second connecting device 9 includes at least one connecting block 91, and the knife holder 21 includes a top knife holder 211. There are two connecting blocks, and the bottom ends of the two connecting blocks 91 are both rotatably connected to the top knife holder 211. The two connecting blocks 91 are parallel to each other, and the through-hole 92 is provided on the connecting block 91. An assembly groove 413 is provided on the first mounting rod 41, and one side of the assembly groove 413 is open; when the connecting block 91 is installed in the assembly groove 413, the side wall of the connecting block 91 abuts against the inner side wall of the assembly groove 413, and at this time, the axis of the first plug hole 411 coincides with the axis of the through-hole 92, which is convenient for the staff to quickly install and remove the first latch 42.

[0052] Reference Figure 3 , Figure 5 and Figure 6In order to fix the knife holder 21 on the machine base 11, the machine base 11 is provided with a first locking device 4 for fixing the knife holder 21. The first locking device 4 includes a first mounting rod 41, a first latch 42 and a first locking mechanism 43. The first mounting rod 41 is fixed on the machine base 11. The two ends of the first mounting rod 41 are respectively abutted against the inner side walls of the two connecting blocks 91. The two ends of the first mounting rod 41 are provided with a first plug hole 411. Each connecting block 91 is provided with a through avoidance groove 2116. The axis of the first plug hole 411 coincides with the axis of the avoidance groove 2116. The first mounting rod 41 is provided with two assembly grooves 413 for accurately positioning the connecting block 91. The two assembly grooves 413 are arranged at intervals and correspond to the two connecting blocks 91 one by one. One side of the assembly groove 413 is open. When the connection block 91 is correctly installed in the assembly groove 413, the side wall of the connection block 91 will tightly abut against the inner side wall of the assembly groove 413, thereby ensuring the stability of the installation.

[0053] Reference Figure 5 There are two first latches 42 and two first locking mechanisms 43. Each first latch 42 passes through the avoidance groove 2116 and the first plug hole 411 in sequence. The end of each first latch 42 abuts against the end of the avoidance groove 2116, thereby fixing the tool holder 21 on the machine base 11.

[0054] Reference Figure 3 and Figure 6 The top blade holder 211 includes at least one connecting member 2111 and at least one end plate 2112. There are two end plates 2112. Both ends of the connecting member 2111 are detachably connected to the two end plates 2112. A clearance groove 2116 for the first mowing mechanism 22 to pass through is provided on one side of the end plate 2112. The clearance groove 2116 is opened toward one side of the edge of the end plate 2112. Therefore, whether it is the installation process or the disassembly process of the end plate 2112, only the end plate 2112 needs to be disassembled, and other parts do not need to be disassembled. Generally, it only takes about 5 minutes, which improves the disassembly efficiency.

[0055] Reference Figure 2 and Figure 3At least two limiting mechanisms 24 are arranged on the top blade holder 211, each limiting mechanism 24 includes two limiting members 241, and the two limiting members 241 are fixed to the end plate 2112 by bolts. The two limiting members 241 are respectively located on opposite sides of the connecting block 91, and the two limiting members 241 are used to limit the rotation angle of the blade holder 21, so as to ensure that the rotation angle of the blade holder 21 around the first mounting rod 41 is 0-30 degrees. Firstly, through the action of the first locking mechanism 43, the connecting block 91 is firmly fixed on the first mounting rod 41, and the two limiting members 241 arranged on the blade holder 21 are respectively located on both sides of the connecting block 91, so as to limit the rotation angle of the blade holder 21 relative to the first mounting rod 41 within the range of 0 to 30 degrees, thereby ensuring the stability of the grass cutting device 2 during operation. When the grass cutting device 2 faces different slopes, the blade holder 21 can be fine-tuned within the limited rotation angle.

[0056] A first connecting device 8 is provided between the machine base 11 and the first locking device 4, and the first locking device 4 is swung in the left and right directions through the first connecting device 8. Each first connecting device 8 includes two connecting rods 81, one end of the connecting rod 81 is rotatably connected to the machine base 11, and the other end of the connecting rod 81 is rotatably connected to the first mounting rod 41. When mowing, if there is a height difference between the mowing surfaces at both ends of the mower, the first connecting device 8 makes the mowing operation more stable and efficient, and reduces the bumpy feeling caused by the uneven road surface.

[0057] Reference Figure 4 and Figure 5 Two first sliding holes 412 are formed at the top of the first mounting rod 41, and the first locking mechanisms 43 correspond to the first sliding holes 412 one by one. Each first locking mechanism 43 includes a first locking rod 431 and a first elastic member 432. The first locking rod 431 is inserted into the first sliding hole 412, and the first locking rod 431 is slidably matched with the first sliding hole 412. The first elastic member 432 is sleeved on the first locking rod 431, and one end of the first elastic member 432 is fixedly connected to the first locking rod 431, and the other end of the first elastic member 432 is fixedly connected to the first mounting rod 41. Specifically, the first elastic member 432 is a spring. When the first locking rod 431 is not affected by external force, under the action of the elastic force of the first elastic member 432, the end of the first locking rod 431 facing the first pin 42 abuts against the surface of the first pin 42, thereby fixing the first pin 42 in the first socket 411 of the first mounting rod 41, thereby fixing the lawn mowing device 2 on the machine base 11.

[0058] Each first locking mechanism 43 further includes a first gripping member 433, which is disposed at one end of the first locking rod 431 away from the first mounting rod 41, and the first gripping member 433 is fixedly connected or movably connected to the first locking rod 431. By pulling the first gripping member 433, the first locking rod 431 is pulled, thereby releasing the fastening effect of the first locking rod 431 on the mowing device 2, and the staff can manually disassemble and assemble the top blade holder 211 without tools, thereby realizing quick disassembly and assembly and saving working time. The first gripping member 433 is a pull ring or a gripping hole, and the pull ring is fixedly connected or movably connected to the first locking rod 431.

[0059] At the same time, a first positioning groove 421 is formed on the arc-shaped outer side wall of the first latch 42. The first positioning groove 421 is annular, and the width of the first positioning groove 421 is equal to the diameter of the first latch 42. When the first latch 42 is not acted upon by an external force, the elastic force of the first elastic member 432 drives the end of the first locking rod 431 to abut against the bottom of the first positioning groove 421. The first positioning groove 421 can prevent the first latch 42 from moving in the axial direction, thereby increasing the firmness of the knife seat 21 fixed to the machine base 11.

[0060] Reference Figure 2 The first mowing mechanism 22 includes a mowing motor 221 and a roller cutter 222. The roller cutter 222 is rotatably arranged on the top cutter frame 211. The mowing motor 221 is installed on the top cutter frame 211. The mowing motor 221 is located at one end of the roller cutter 222. The output shaft of the mowing motor 221 is fixedly connected to the end of the roller cutter 222. The mowing motor 221 is used to drive the roller cutter 222 to rotate.

[0061] Reference Figure 2 , Figure 3 and Figure 7 The mowing motor 221 is detachably connected to the top blade holder 211. The top blade holder 211 is provided with a rotation locking device 6 for fixing the mowing motor 221. The rotation locking device 6 includes a linkage member 61 and two rotation locking members 62. The two rotation locking members 62 are respectively located on both sides of the mowing motor 221. One end of each rotation locking member 62 is rotatably connected to the blade holder 21, and the two ends of the linkage member 61 are detachably connected to the two rotation locking members 62. Of course, the two ends of the linkage member 61 can also be integrally formed with the ends of the two rotation locking members 62.

[0062] Each rotary locking member 62 includes a locking seat 621 and a plug rod 622. The locking seat 621 is rotatably connected to the knife seat 21, and one end of the plug rod 622 close to the locking seat 621 is integrally formed with the locking seat 621. The linkage member 61 is U-shaped, and both ends of the linkage member 61 are provided with plug holes. One end of the plug rod 622 away from the locking seat 621 is inserted into the plug hole, and the plug rod 622 is plugged into the plug hole, so that the two locking seats 621 are fixed to the two ends of the linkage member 61, which increases the convenience of the staff to install and disassemble the rotary locking device 6.

[0063] Each locking seat 621 is provided with an arc-shaped locking groove 623 on one side facing the mowing motor 221. When the rotary locking member 62 is rotated to a vertical state, the locking groove 623 is opened at one end facing the mowing motor 221, which is convenient for subsequent locking operations. The mowing motor 221 is provided with locking columns 223 on two opposite sides. The locking columns 223 and the mowing motor 221 can be connected in a fixed connection or a rotating connection. Both locking posts 223 are rotatably connected to the lawn mowing motor 221. During the process of fixing or removing the lawn mowing motor 221, the friction between the locking post 223 and the rotary locking piece 62 can be reduced, making the operation smoother. At the same time, since the shape of the locking groove 623 is a non-standard arc groove, when the rotary locking piece 62 locks the lawn mowing motor 221, the rotary locking piece 62 will not rotate easily, thereby ensuring that the locking post 223 will not disengage from the locking groove 623, thereby increasing the firmness of the rotary locking piece 62 in fixing the lawn mowing motor 221.

[0064] An annular seat 2113 is fixedly provided on one side of the top blade frame 211 facing the mowing motor 221, and two positioning posts 2114 are fixedly provided on the annular seat 2113. Two positioning holes are correspondingly provided at the end of the mowing motor 221, and the positioning posts 2114 correspond to the positioning holes one by one. When the mowing motor 221 is installed on the top blade frame 211, the positioning posts 2114 are plugged into the positioning holes. The two positioning posts 2114 have a positioning function for the mowing motor 221, thereby increasing the firmness of the mowing motor 221 installed on the top blade frame 211.

[0065] A through hole 2115 is provided on one side of the top blade holder 211 facing the lawn mower motor 221. When the positioning column 2114 on the top blade holder 211 is inserted into the positioning hole at the end of the lawn mower motor 221, the output shaft of the lawn mower motor 221 is plugged into and matched with one end of the roller 222. Therefore, when the lawn mower motor 221 drives the rotating shaft 121 to rotate, it smoothly drives the rolling rotation.

[0066] Reference Figure 3 , Figure 7 and Figure 8, the second mowing mechanism 23 is detachably connected to the top blade frame 211, and the second mowing mechanism 23 is located below the first mowing mechanism 22. The second mowing mechanism 23 includes a bottom blade frame 231 and a bottom blade 232, wherein the bottom blade frame 231 is detachably connected to the top blade frame 211, and the top blade frame 211 is provided with a second locking device 5 for fixing the bottom blade frame 231. When the bottom blade frame 231 is fixed to the top blade frame 211, the bottom blade 232 is located directly below the reel 222, and when the mower is moving forward or backward, the reel 222 will start to rotate through the driving action of the mowing motor 221. During the rotation of the reel 222, it will cooperate with the bottom blade 232 below, and the mower can efficiently realize the mowing function.

[0067] The upper surface of the bottom blade 232 is inclined, and the bottom of the reel 222 abuts against the upper surface of the bottom blade 232; a strip-shaped sharpening groove 233 is provided on the upper surface of the bottom blade 232, and a sharpening flange 234 is provided on the inner side wall of one side of the sharpening groove 233. When the mowing motor 221 drives the reel 222 to rotate forward, the reel 222 cooperates with the bottom blade to achieve the mowing work; when the mowing motor 221 drives the reel 222 to rotate reversely, the bottom blade 232 contacts the reel 222 to achieve the automatic sharpening function, and the reel 222 can be kept sharp without disassembling it, which greatly improves the mowing efficiency and maintenance convenience.

[0068] Reference Figure 4 and Figure 5 The second locking device 5 includes a second mounting rod 51, a second latch 52 and a second locking mechanism 53. The second mounting rod 51 is fixed to the machine base 11. The two ends of the second mounting rod 51 are respectively in contact with the inner side walls of the two connecting blocks 91. The two ends of the second mounting rod 51 are provided with second plug holes 511. Each connecting block 91 is provided with a through hole. The axis of the second plug hole 511 coincides with the axis of the through hole. The number of the second latch 52 and the second locking mechanism 53 are both two. Each second latch 52 passes through the through hole and the second plug hole 511 in turn. The end of each second latch 52 is in contact with the end of the through hole, thereby fixing the knife seat 21 to the machine base 11.

[0069] Reference Figure 3 , Figure 4 and Figure 5The top of the second mounting rod 51 is provided with two second sliding holes 512, and the second locking mechanisms 53 correspond to the second sliding holes 512 one by one. Each second locking mechanism 53 includes a second locking rod 531 and a second elastic member 532. The second locking rod 531 is inserted into the second sliding hole 512, and the second locking rod 531 is slidably matched with the second sliding hole 512. The second elastic member 532 is sleeved on the second locking rod 531, and one end of the second elastic member 532 is fixedly connected to the second locking rod 531, and the other end of the second elastic member 532 is fixedly connected to the second mounting rod 51. Specifically, the second elastic member 532 is a spring. When the second locking rod 531 is not affected by external force, under the action of the elastic force of the second elastic member 532, the second locking rod 531 has one end facing the second pin 52 abut against the surface of the second pin 52, thereby fixing the second pin 52 in the second socket 511 of the second mounting rod 51, thereby fixing the blade seat 21 on the machine seat 11, and thus fixing the lawn mower device 2 on the machine seat 11, which increases the convenience for the staff to install and disassemble the lawn mower device 2.

[0070] Each second locking mechanism 53 also includes a second gripping member 533, which is disposed at one end of the second locking rod 531 away from the second mounting rod 51. The second gripping member 533 is fixedly connected or movably connected to the second locking rod 531. By pulling the second gripping member 533 to pull the second locking rod 531, the second locking rod 531 is released from the fastening effect of the second locking rod 531 on the mowing device 2. The staff can manually disassemble and assemble the top blade holder 211 without tools, thereby realizing quick disassembly and assembly and saving working time. The specific second gripping member 533 is a pull ring, which is fixedly connected or movably connected to the second locking rod 531. Of course, the second gripping member 533 in this embodiment can also be a gripping hole opened on the second locking rod 531.

[0071] Reference Figure 5 At the same time, a second positioning groove 521 is provided on the arc-shaped outer side wall of the second latch 52, and the second positioning groove 521 is annular. When the second latch 52 is not acted upon by an external force, the elastic force of the second elastic member 532 drives the end of the second locking rod 531 to abut against the bottom of the second positioning groove 521. The second positioning groove 521 has a positioning effect on the second latch 52, and can prevent the second latch 52 from moving in the axial direction, thereby increasing the firmness of the knife seat 21 fixed to the machine base 11.

[0072] Reference Figure 7A battery mechanism is provided on the base 11, and a cable 7 is provided between the battery mechanism and the lawn mower motor 221. One end of the cable 7 close to the battery mechanism is fixedly connected to the battery mechanism, and one end of the cable 7 close to the lawn mower motor 221 is fixedly connected to the lawn mower motor 221. A flexible sheath 71 is provided on the outer sheath of one end of the cable 7 close to the lawn mower motor 221, and one end of the flexible sheath 71 is connected to the lawn mower motor 221. A hard sheath 72 is detachably connected to the lawn mower motor 221, and one end of the flexible sheath 71 close to the lawn mower motor 221 is located in the hard sheath 72. The flexible sheath 71 and the hard sheath 72 reduce the bending degree of the cable 7 and extend the service life of the cable 7.

[0073] The hard jacket 72 includes two clamping sleeves 721 of the same and symmetrical structure, the inner side walls of the two clamping sleeves 721 abut against each other, and the two adjacent clamping sleeves 721 are fixed by bolts and nuts. A bearing portion 224 is integrally formed on the top of the housing of the mowing motor 221, and the tops of the two bearing portions 224 are both flat. Mounting portions 722 are integrally formed on the opposite sides of each clamping sleeve 721, the inner side walls of the two mounting portions 722 abut against each other, and the lower surfaces of the two mounting portions 722 abut against the upper surface of the bearing portion 224. A clamping block 73 is provided on the upper surface of the two mounting portions 722 located on the same side, and the lower surface of each clamping block 73 abuts against the upper surfaces of the two mounting portions 722 at the same time. Two bolts are penetrated on each clamping block 73, and the bolts correspond to the mounting portion 722 one by one. Each bolt passes through the mounting portion 722 and is threadedly matched with the bearing portion 224, which increases the convenience of the staff in installing and removing the hard jacket 72.

[0074] Reference Figure 1 The control device 3 includes an armrest 31. Two parallel mounting tubes 111 are integrally formed on the side of the machine base 11 away from the mowing device 2. The end of each mounting tube 111 away from the machine base 11 is open. The armrest 31 includes a gripping rod 311 and two connecting rods 312. The two ends of the gripping rod 311 are fixedly connected to the two connecting rods 312. The connecting rods 312 correspond to the mounting tubes 111 one by one. The connecting rods 312 and the mounting tubes 111 are plugged and matched, so as to fix the armrest 31 on the machine base 11. In addition, the mounting tube 111 is provided with a plurality of bolt holes in sequence along the length direction of its axis. These bolt holes facilitate the installation and removal of the armrest 31, and also allow the operator to adjust the height of the armrest 31 as needed to adapt to different operating requirements and height differences. The armrest 31 also includes a reinforcing rod 313. The two ends of the reinforcing rod 313 are fixedly connected to the two connecting rods 312, respectively, to increase the overall structural strength of the armrest 31.

[0075] The control device 3 also includes a control mechanism 32 and a control rod 33. The control mechanism 32 is disposed on one of the connecting rods 312. The control mechanism 32 is electrically connected to the driving mechanism 13 to facilitate the control of the operation of the driving mechanism 13. At the same time, the control mechanism 32 is electrically connected to the mowing motor 221. The control mechanism 32 is responsible for receiving instructions from the operator and controlling the output shaft of the mowing motor 221 to rotate forward or reverse, thereby realizing the mowing or sharpening function.

[0076] In order to ensure the safety of operation, the control mechanism 32 is also equipped with a control rod 33. One end of the control rod 33 is rotatably connected to the control mechanism 32, and the other end is rotatably connected to the armrest 31. During operation, the operator needs to hold the control rod 33 and the armrest 31 at the same time, and press the control rod 33 in the direction close to the armrest 31 until the two are in contact with each other. At this time, the control mechanism 32 will receive the start signal, and then control the power device 1 to start, so that the lawn mower moves forward and performs the lawn mowing task. If the operator only holds the armrest 31 without pressing the control rod 33, the control mechanism 32 will not receive the start signal, and the lawn mower will remain stopped, thereby effectively preventing safety risks caused by misoperation.

[0077] The control device 3 also includes a balancer, which is arranged on the base 11 and is electrically connected to the travel motor. When the lawn mower is moving or turning, if the operator causes the lawn mower to tilt at an angle greater than 10°, the balancer can instantly sense the tilt state of the base 11 and send a corresponding signal to the travel motor, thereby automatically regulating and slowing down the forward speed of the lawn mower. The lawn mower realizes automatic coordination between the mowing speed and the forward speed by integrating an intelligent speed regulation and balance control system. When the lawn mower is moving forward or turning around, when the operator presses the control lever 33 and presses the armrest 31 at the same time, the armrest 31 drives the base 11 to rotate. When the tilt angle of the base 11 exceeds 10°, the balancer can quickly sense and send a signal to the travel motor, automatically regulating and slowing down the forward speed of the lawn mower, effectively improving the stability and safety of the lawn mower and improving the overall operating efficiency and quality.

[0078] When the operator presses the control lever 33 and starts the lawn mower, the travel motor starts to work and drives the lawn mower forward. At the same time, the control mechanism 32 controls the output shaft of the motor mowing motor 221 to rotate forward or reverse according to the operator's instructions to achieve the mowing or sharpening function. When the output shaft speed of the travel motor increases or decreases, under the action of the balancer, the output shaft speed of the mowing motor speed increases or slows down accordingly, ensuring that the mowing speed of the mowing device 2 is consistent with the overall forward speed of the mowing machine. When the output shaft speed of the travel motor changes, the output shaft speed of the mowing motor can respond immediately and make corresponding adjustments, ensuring that the mowing speed of the mowing device 2 is always consistent with the overall forward speed of the mowing machine.

[0079] The implementation principle of the above embodiment is: the first pin 42 passes through the through hole 92 of the blade seat 21 and the insertion hole of the first mounting rod 41, and the first locking rod 431 in the first locking mechanism 43 slides in the first sliding hole 412 and is clamped by the elastic force of the first elastic member 432 to achieve a stable connection between the blade seat 21 and the machine base 11; when disassembling, the user only needs to simply move the first locking rod 431 to overcome the elastic force to release the first pin 42 and complete the quick disassembly of the mowing device 2. This process does not require tools, simplifies the operation, and improves the maintenance efficiency and convenience of the locking mechanism.

[0080] Example 2 Fig.10 Fig.11 The difference between Example 2 and Example 1 lies in the control device 3: the control device 3 in this embodiment still includes an armrest 31, which includes a reinforcing rod 313 and two connecting rods 312. The two ends of the reinforcing rod 313 are respectively fixedly connected to the two connecting rods 312, and the two connecting rods 312 pass through the mounting seat 34 and are fixedly connected to the mounting seat 34. The armrest 31 is also newly provided with a mounting seat 34 and a gripping handle 35, so that the armrest 31 is more stable.

[0081] Reference Figure 2 and Fig.10 The control mechanism 32 is disposed at the end of the mounting seat 34, so that the control mechanism 32 can conveniently receive the operator's instructions and realize accurate control of the mowing motor 221 and the driving mechanism 13. Similar to the first embodiment, the control mechanism 32 is also electrically connected to the driving mechanism 13 and the mowing motor 221, and is responsible for receiving the operator's instructions and controlling the output shaft of the mowing motor 221 to rotate forward or reverse, thereby realizing the mowing or sharpening function.

[0082] The control mechanism 32 in this embodiment is also equipped with a control rod 33, both ends of which are rotatably connected to the mounting seat 34 and electrically connected to the control mechanism 32. During operation, the operator needs to hold the control rod 33 and the armrest 31 at the same time, and press the control rod 33 in the direction close to the armrest 31 until the two are in contact with each other. Only then will the control mechanism 32 receive the start signal, and then control the power device 1 to start, so that the lawn mower moves forward and performs the lawn mowing task. If the operator only holds the armrest 31 without pressing the control rod 33, the control mechanism 32 cannot receive the start signal, and the lawn mower will remain stopped, thereby effectively preventing safety risks caused by misoperation.

[0083] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lawn mower, characterized in that: The invention comprises a power device (1) and a grass cutting device (2), wherein the power device (1) comprises a machine base (11), and the grass cutting device (2) comprises a blade holder (21), wherein the blade holder (21) is detachably connected to the machine base (11); a first locking device (4) for fixing the blade holder (21) is arranged on the machine base (11), and the first locking device (4) comprises a first mounting rod (41), a first latch (42) and a first locking mechanism (43); the first mounting rod (41) is arranged on the machine base (11), and a first insertion hole (411) is provided at the end of the first mounting rod (41); a through-hole (92) is provided on the blade holder (21), and the first latch (42) passes through the through-hole (92) and the first insertion hole (411) in sequence; the first locking mechanism (43) is arranged on the first mounting rod (41), and the first locking mechanism (43) is used to fix the first latch (42).

2. The lawn mower according to claim 1, characterized in that: The first locking mechanism (43) comprises a first locking rod (431) and a first elastic member (432); the first mounting rod (41) is provided with a first sliding hole (412); the axial direction of the first sliding hole (412) is perpendicular to the axial direction of the first insertion hole (411); the first locking rod (431) is inserted into the first sliding hole (412) and is slidably matched with the first sliding hole (412); the first elastic member (432) is sleeved on the first locking rod (431); 31), the first elastic member is arranged in the first sliding hole (412); one end of the first elastic member (432) is fixedly connected to the first locking rod (431), and the other end of the first elastic member (432) is fixedly connected to the inner wall of the first sliding hole (412); when the first elastic member (432) is not subjected to external force, the first locking rod (431) abuts against the surface of the first pin (42) under the elastic force of the first elastic member (432).

3. The lawn mower according to claim 2, characterized in that: A first positioning groove (421) is provided on the outer side wall of the first latch pin (42). When the first latch pin (42) is not acted upon by an external force, the elastic force of the first elastic member (432) drives the end of the first locking rod (431) to abut against the bottom of the first positioning groove (421).

4. The lawn mower according to claim 1, characterized in that: A first connecting device (8) is provided between the machine base (11) and the first locking device (4), and the first locking device (4) is swung in left and right directions through the first connecting device (8); the first connecting device (8) comprises at least two connecting rods (81), one end of the connecting rod (81) is rotatably connected to the machine base (11), and the other end of the connecting rod (81) is rotatably connected to the first mounting rod (41).

5. The lawn mower according to claim 1, characterized in that: A second connecting device (9) is provided between the first locking device (4) and the knife seat (21), and the knife seat (21) is swung in the front-rear direction through the second connecting device (9).

6. The lawn mower according to claim 5, characterized in that: The second connecting device (9) comprises at least one connecting block (91), the knife seat comprises a top knife holder (211), the top knife holder (211) is rotatably connected to the connecting block (91), and the through hole (92) is provided on the connecting block (91); the first mounting rod (41) is provided with an assembly groove (413) for positioning the connecting block (91), and one side of the assembly groove (413) is open; when the connecting block (91) is installed in the assembly groove (413), the side wall of the connecting block (91) abuts against the inner side wall of the assembly groove (413), and the axis of the first plug hole (411) coincides with the axis of the through hole (92).

7. The lawn mower according to claim 6, characterized in that: A limiting mechanism (24) is provided on the knife seat (21), and the limiting mechanism (24) includes two limiting members (241). The two limiting members (241) are both provided on the knife seat (21), and the two limiting members (241) are respectively located on two opposite sides of the connecting block (91). When the knife seat (21) rotates, the side wall of the connecting block (91) contacts the inner side wall of the limiting member (241), and the two limiting members (241) are used to limit the rotation angle of the knife seat (21).

8. The lawn mower according to claim 6, characterized in that: The top tool holder (211) comprises a connecting piece (2111) and at least one end plate (2112), wherein an end of the connecting piece (2111) is detachably connected to the end plate (2112); a avoidance groove (2116) is provided on one side of the end plate (2112), and the avoidance groove (2116) is opened toward a side of an edge of the end plate (2112).

9. The lawn mower according to claim 1, characterized in that: The grass cutting device (2) further comprises a first grass cutting mechanism (22), the first grass cutting mechanism (22) comprising a grass cutting motor (221) and a roller cutter (222), the roller cutter (222) being rotatably arranged on the cutter seat (21), and the grass cutting motor (221) being detachably connected to the cutter seat (21).

10. The lawn mower according to claim 9, characterized in that: The blade holder (21) is provided with a rotary locking device (6), the rotary locking device (6) comprising a linkage member (61) and at least one rotary locking member (62), the linkage member (61) being connected to the rotary locking member (62); the rotary locking member (62) is provided with an arc-shaped locking groove (623); the lawn mowing motor (221) is provided with at least one locking column (223); when the rotary locking member (62) rotates, the movement trajectory of the locking groove (623) on the rotary locking member (62) passes through the locking column (223); when the rotary locking member (62) rotates to an appropriate position, the locking column (223) falls into the locking groove (623), thereby fixing the lawn mowing motor (221) to the blade holder (21).

11. The lawn mower according to claim 1, characterized in that: The base (11) is provided with a battery mechanism, the battery mechanism is connected to the lawn mowing motor (221) via a cable (7), the cable (7) is provided with a flexible sheath (71) on the outside, the flexible sheath (71) is provided with a hard sheath (72) on the outside, the hard sheath (72) is detachably connected to the lawn mowing motor (221); the hard sheath (72) comprises two clamping sheaths (721), the inner side walls of the two clamping sheaths (721) are in contact with each other, and the two adjacent clamping sheaths (721) are fixed by bolts and nuts; the lawn mowing motor (221) is provided with a flexible sheath (71) on the outside, and the flexible sheath (71) is provided with a hard sheath (72) on the outside, and the hard sheath (72) is detachably connected to the lawn mowing motor (221); the hard sheath (72) comprises two clamping sheaths (721), the inner side walls of the two clamping sheaths (721) are in contact with each other, and the two adjacent clamping sheaths (721) are fixed by bolts and nuts; 1) is provided with a bearing portion (224), a mounting portion (722) is fixedly provided on the clamping sleeve (721), and the lower surface of the mounting portion (722) abuts against the upper surface of the bearing portion (224); a clamping block (73) is provided on the upper surface of the two mounting portions (722) located on the same side, and the lower surface of the clamping block (73) abuts against the upper surfaces of the two mounting portions (722) at the same time; each of the clamping blocks (73) is provided with a bolt corresponding to the mounting portion (722), and the bolt passes through the mounting portion (722) and is threadedly matched with the bearing portion (224).

12. The lawn mower according to claim 9, characterized in that: The mowing device (2) further comprises a second mowing mechanism (23), the second mowing mechanism (23) being detachably connected to the blade holder (21), and the second mowing mechanism (23) being located below the first mowing mechanism (22); the second mowing mechanism (23) comprising a bottom blade holder (231) and a bottom blade (232), the bottom blade holder (231) being detachably connected to the blade holder (21), and the bottom blade (232) being arranged on the bottom blade holder (231); the bottom blade (232) being located below the roller blade (222), the upper surface of the bottom blade (232) being arranged in an inclined manner, and the bottom of the roller blade (222) being in contact with the upper surface of the bottom blade (232); a strip-shaped sharpening groove (233) being provided on the upper surface of the bottom blade (232), and a sharpening flange (234) being provided on the inner side wall of one side of the sharpening groove (233).

13. The lawn mower according to claim 12, characterized in that: The knife seat (21) is provided with a second locking device (5) for fixing the bottom knife frame (231), the second locking device (5) comprises a second mounting rod (51), a second latch (52) and a second locking mechanism (53), the second mounting rod (51) is fixed on the machine base (11), the two ends of the second mounting rod (51) are respectively abutted against the inner side walls of the two connecting blocks (91), the two ends of the second mounting rod (51) are provided with second insertion holes (511), the second latch (52) passes through the through hole (92) and the second insertion hole (511) in sequence, so as to fix the knife seat (21) on the machine base (11); the second locking mechanism (53) comprises a second locking rod (531) and a second elastic member (532), the second mounting rod (51) is provided with a second sliding hole (511), and the second sliding hole (511) is provided on the second mounting rod (51). 2), the axial direction of the second sliding hole (512) is perpendicular to the axial direction of the second plug hole (511); the second locking rod (531) is inserted into the second sliding hole (512) and slides with the second sliding hole (512); the second elastic member (532) is sleeved on the second locking rod (531), and the second elastic member (532) is arranged in the second sliding hole (512); one end of the second elastic member (532) is fixedly connected to the second locking rod (531), and the other end of the second elastic member (532) is fixedly connected to the second mounting rod (51); when the second elastic member (532) is not subjected to external force, the second locking rod (531) abuts against the surface of the first latch (42) under the elastic force of the second elastic member (532).

14. The lawn mower according to claim 1, characterized in that: The invention also comprises a control device (3), the control device (3) comprising an armrest (31), a control mechanism (32) and a control rod (33), the armrest (31) being detachably connected to the machine base (11), the control mechanism (32) being arranged on the armrest (31) and being used for receiving operation instructions and controlling the operation of the power device (1) and the mowing device (2) of the lawn mower, and the control rod (33) being rotatably connected to the armrest (31).

15. The lawn mower according to claim 14, characterized in that: The power device (1) further comprises a roller mechanism (12) and a driving mechanism (13), wherein the roller mechanism (12) is rotatably connected to the machine base (11), and the driving mechanism (13) is used to drive the roller mechanism (12) to rotate; the driving mechanism (13) comprises a travel motor, and the control device (3) further comprises a balancer, wherein the balancer is electrically connected to the travel motor; when the lawn mower is moving or turning, when the inclination angle of the lawn mower is greater than 10°, the balancer can instantly sense the inclination state of the lawn mower and send a corresponding signal to the travel motor, thereby automatically regulating and slowing down the forward speed of the lawn mower; when the output shaft speed of the travel motor increases or decreases, the output shaft speed of the lawn mower motor (221) is correspondingly accelerated or slowed down, thereby ensuring that the grass cutting speed of the lawn mower device (2) is coordinated with the overall forward speed of the lawn mower.

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