A lawnmower

Abstract

A lawnmower characterized in that it comprises a drive device and a mowing unit, wherein the drive device comprises a machine base, the mowing unit comprises a blade carrier, and the blade carrier is detachably connected to the machine base; a first locking device for securing the blade carrier is arranged on the machine base, wherein the first locking device comprises a first mounting rod, a first locking pin, and a first locking mechanism; the first mounting rod is arranged on the machine base, a first through-hole is formed in its end part, a through-hole is formed in the blade carrier, and the first locking pin is successively inserted through the through-hole and the first through-hole; and the first locking mechanism is arranged on the first mounting rod and serves to fix the first locking pin.

Description

Technical field

[0001] The present application concerns the field of lawn mowing equipment, in particular a lawn mower. State of the art

[0002] Lawn mowers, as core tools in garden maintenance, play a crucial role in lawn care and the upkeep of garden landscapes. With technological advancements and increasing user demands for lawn mower performance, their capabilities are constantly evolving, with a focus on breakthroughs in user-friendliness, cutting performance, and operational safety.

[0003] In related lawnmower technologies, various devices, mechanisms, or components are typically fastened with screws. If a particular device, mechanism, or component needs to be disassembled separately, the operator must use tools each time, resulting not only in time-consuming tool searches but also additional work steps. Since these devices, mechanisms, or components are usually secured with multiple screws, and the number of screws is relatively high, the assembly or disassembly processes are comparatively cumbersome and time-consuming, with each assembly or disassembly taking at least 5 minutes or more, and even 30 minutes or more for complex structures, thus reducing the lawnmower's maintenance efficiency. Content of the invention

[0004] To improve the maintenance efficiency and convenience of lawn mowers, the present application offers a lawn mower.

[0005] A lawnmower comprises a drive device and a mowing unit, wherein the drive device comprises a machine base, the mowing unit comprises a blade carrier, and the blade carrier is detachably connected to the machine base; a first locking device for securing the blade carrier is arranged on the machine base, wherein the first locking device comprises a first mounting rod, a first locking pin, and a first locking mechanism; the first mounting rod is arranged on the machine base, a first through-hole is formed in its end part, a through-hole is formed in the blade carrier, and the first locking pin is successively inserted through the through-hole and the first through-hole; and the first locking mechanism is arranged on the first mounting rod and serves to fix the first locking pin.

[0006] By applying the above concept, the first locking pin is inserted through the through-hole on the blade carrier and the first through-hole on the first mounting rod, and then secured by the first locking mechanism. This allows for quick assembly and disassembly of the blade carrier with the machine base and, consequently, quick assembly and disassembly of the mower unit with the drive unit. The present application uses the first locking pin instead of the conventional screw fastening, allowing the mower unit to be disassembled manually without the need for tools such as wrenches. This reduces the number of tools required and increases the maintenance efficiency of the lawnmower.

[0007] Optionally, the first locking mechanism comprises a first locking bar and a first spring element, wherein a first sliding bore is formed in the first mounting bar, the axial direction of which is perpendicular to the axial direction of the first through-hole; the first locking bar is arranged in the first sliding bore and is slidably guided with it, the first spring element is mounted on the first locking bar and is arranged in the first sliding bore; one end of the first spring element is fixedly connected to the first locking bar and the other end is fixedly connected to the inner wall of the first sliding bore; and when no external force acts on the first spring element, the first locking bar rests against the surface of the first locking pin under the spring force of the first spring element.

[0008] With this design, the first locking bar slides in a first displacement bore, and in conjunction with the spring force of the first spring element, the first locking pin can be effectively locked and unlocked. When the first locking pin is fully inserted, it is secured by the first locking bar, which is advanced by the first spring element, to prevent loosening and thus stabilize the connection between the knife carrier and the machine base. To release the connection between the knife carrier and the machine base, the user simply needs to counteract the spring force of the first spring element and move the first locking bar to release the first locking pin. This step can typically be completed within 0-5 seconds.

[0009] Optionally, a first positioning groove is formed in the outer wall of the first locking pin, and when no external force acts on the first locking pin, the spring force of the first spring element presses the end part of the first locking bar against the groove base of the first positioning groove.

[0010] With this design, the first positioning groove on the first locking pin and the end of the first locking rod interlock. Under the spring force of the first spring element, the end of the first locking rod can be pressed firmly against the bottom of the first positioning groove, thus securely locking the first locking pin. This increases the stability of the connection, prevents unintentional loosening of the first locking pin due to vibration or external forces, ensures a reliable connection between the blade carrier and the machine base, and improves the safety and longevity of the lawnmower.

[0011] Optionally, a first connecting device is arranged between the machine base and the first locking device, which enables the first locking device to pivot in a left-right direction; wherein the first connecting device comprises at least two hinge rods, one end of which is rotatably connected to the machine base and the other end of which is rotatably connected to the first mounting rod.

[0012] This design allows the blade carrier to fine-tune itself within a defined angle of rotation when the lawnmower encounters changes in elevation or slopes in a left-right direction while in motion. This fine-tuning capability enables the mower unit to adapt better to different mowing tasks and ensures high work efficiency and ease of use when mowing both uphill and downhill. The first connecting device is implemented using at least two articulated rods and allows the first locking mechanism to pivot to a certain extent relative to the machine base while the lawnmower is moving over changes in elevation or slopes in a left-right direction. This helps to maintain stable contact between the mower unit and the ground and reduces the effects of terrain changes on the lawnmower's stability.

[0013] Optionally, a second connecting device is arranged between the first locking device and the knife carrier, which allows the knife carrier to pivot in a forward-backward direction.

[0014] With this concept, the blade carrier can fine-tune itself within the limited rotation angle when the gradient changes, enabling the mowing device to adapt better to different mowing tasks and ensuring high work efficiency and ease of use both uphill and downhill.

[0015] Optionally, the second connection device comprises at least one connecting block; the knife carrier includes an upper knife holder; the upper knife holder is rotatably connected to the connecting block; and the through-hole is formed in the connecting block; a mounting groove for positioning the connecting block is formed in the first mounting rod, with one side of the mounting groove being open; and when the connecting block is mounted in the mounting groove, its side wall rests against the inner wall of the mounting groove, and the axis of the first through-hole coincides with the axis of the through-hole.

[0016] This design facilitates quick alignment and insertion of the connecting block, as one side of the mounting groove is open. Once the connecting block is fully seated in the mounting groove, its side wall rests firmly against the inner wall of the groove, ensuring a stable connection between the blade carrier and the machine base. Simultaneously, the first locking pin, inserted through the feedthrough opening and secured by the first locking mechanism, enhances the stability and security of the connection. This simplifies the assembly and disassembly process of the mower unit and improves maintenance efficiency.

[0017] Optionally, a limiting device is arranged on the knife carrier, comprising two limiting elements, both of which are arranged on the knife carrier and are located on opposite sides of the knife carrier; when the knife carrier rotates, its side wall abuts the inner wall of a limiting element, and the two limiting elements serve to limit the rotation angle of the knife carrier.

[0018] With this design, the first locking mechanism securely fixes the connecting block to the first mounting rod. The two limiting elements, located on opposite sides of the connecting block, are positioned on the blade carrier. These limiting elements restrict the blade carrier's rotation angle relative to the first mounting rod to a range of 0 to 30 degrees. This ensures the stability of the mower during operation and prevents malfunctions or damage caused by excessive rotation. When encountering changes in gradient, the blade carrier can fine-tune its position within this limited rotation angle, allowing the mower to adapt more effectively to different mowing tasks and ensuring high efficiency and ease of use both uphill and downhill.

[0019] Optionally, the upper blade holder comprises a connecting part and at least one end plate, wherein the end part of the connecting part is detachably connected to the end plate. A recessed groove is formed in one side of the end plate, the side of which facing the edge of the end plate is open.

[0020] With the aforementioned concept, end plates in related technologies that have a continuous round, square, or oval opening require the disassembly of components located outside the end plate before the end plate itself can be removed. Therefore, both the assembly and disassembly processes typically take more than 30 minutes or even over an hour. In the end plate described in this application, the side with the through-hole is open. This eliminates the need to disassemble any external components during either the assembly or disassembly process. Only the end plate itself needs to be removed, without the need to remove any other parts. This typically takes only about 5 minutes, thus increasing maintenance efficiency.

[0021] Optionally, the mowing unit further includes a first mowing device comprising a mowing drive motor and a roller blade. The roller blade is rotatably mounted on the blade carrier, the mowing drive motor is detachably attached to the blade carrier, and the output shaft of the mowing drive motor is rigidly connected to the end of the roller blade.

[0022] With this concept, the first mowing device allows for the detachable mounting of the mower drive motor to the blade carrier. Its output shaft is directly connected to the roller blade and drives it to perform the mowing task. This not only simplifies maintenance and replacement of the mower drive motor, but also ensures that the roller blade receives a stable and powerful drive force, thereby effectively increasing mowing performance and quality.

[0023] Optionally, a rotary locking device is arranged on the blade carrier, comprising a drive element and at least one rotary locking element, wherein the drive element is connected to the rotary locking element; an arc-shaped locking slot is formed in the rotary locking element; at least one locking pin is arranged on the mower drive motor; and when the rotary locking element is rotated, the movement track of the locking slot on the rotary locking element passes the locking pin, and when the rotary locking element is rotated into a suitable position, the locking pin engages in the locking slot, thereby fixing the mower drive motor to the blade carrier.

[0024] With this design, the rotary locking device on the blade carrier utilizes the arc-shaped locking slot on at least one rotary locking element, which interacts with the locking pin on the mower drive motor. Rotating the rotary locking element guides the movement of the locking slot over the locking pin, and upon reaching the appropriate position, the locking pin engages in the slot, enabling quick and secure locking of the mower drive motor. Because the locking slot has a non-standard arc-shaped structure, the rotary locking element cannot easily rotate after the mower drive motor is locked, regardless of whether the locking pin on the mower drive motor is fixed or rotatably mounted. This increases the strength of the mower drive motor's fixation by the rotary locking element.This not only simplifies the installation process of the mower drive motor, but also provides a stable connection method that ensures the stability and safety of the mower drive motor during high-speed operation, while also facilitating disassembly and maintenance.

[0025] Optionally, a battery unit is mounted on the machine base and connected to the mower drive motor via a cable. This cable is enclosed by a flexible protective sleeve, which in turn is enclosed by a rigid protective sleeve. The rigid protective sleeve is detachably connected to the mower drive motor. The rigid protective sleeve comprises two clamping sleeves whose inner walls abut each other, and two adjacent clamping sleeves are fastened by screws and nuts. A support bracket is mounted on the mower drive motor, and a mounting bracket is permanently attached to the clamping sleeves. The lower surface of this mounting bracket rests against the upper surface of the support bracket. A clamping block is located on the upper side of each of the two mounting brackets on the same side, with its lower surface simultaneously resting against the upper surfaces of both mounting brackets.Each clamping block has a screw inserted that corresponds to the mounting part, is guided through the mounting part and is screwed into the supporting part.

[0026] With this concept, related technologies that use gasoline engines to drive the roller knife easily cause environmental pollution.

[0027] The battery unit described in this application is connected to the mower drive motor via a cable. The rigid protective casing consists of two removable clamping sleeves, which are attached to the mounting bracket of the mower drive motor by means of screws and nuts and securely installed by clamping blocks. This protects the cable from damage, prevents its bending and deformation, facilitates installation and maintenance, and ensures the stability and safety of the power transmission, thereby increasing the overall environmental friendliness of the device.

[0028] Optionally, the mowing device further comprises a second mowing device which is detachably connected to the knife carrier and is located below the first mowing device; the second mowing device comprises a lower knife holder and a lower knife blade, wherein the lower knife holder is detachably connected to the knife carrier, the lower knife blade is arranged on the lower knife holder, its upper surface is inclined and the bottom of the roller knife rests against the upper surface of the lower knife blade; and a strip-shaped grinding groove is formed in the upper surface of the lower knife blade, the inner side wall of which is provided with a grinding collar.

[0029] With this concept, when the mower drive motor rotates the roller blade in the forward direction (cutting direction), the sharp cutting edges of the roller blade contact the top of the bottom blade, and both work together to perform the cutting task. In this case, the interaction between the roller blade and the bottom blade focuses primarily on the transmission of shearing force. The angled top of the bottom blade helps to efficiently guide the grass into the cutting area while simultaneously reducing cutting resistance; when the mower drive motor rotates the roller blade in the opposite direction (sharpening direction), its lower edge periodically comes into contact with the grinding ring, gradually removing the dull layer that has formed on the edge of the roller blade over time, thus restoring its sharpness.The lower blade holder is detachably connected to the blade carrier, and the lower blade is attached to the lower blade holder, which facilitates the replacement and maintenance of the lower blade and holder.

[0030] Optionally, a second locking device for securing the lower knife holder is arranged on the knife carrier, comprising a second mounting rod, a second locking pin and a second locking mechanism, wherein the second mounting rod is attached to the machine base, its two ends each rest against the inner walls of the two connecting blocks and a second through-hole is formed at each end, a through-hole is formed in each connecting block and the second locking pin is inserted successively through the through-hole and the second through-hole to fix the knife carrier to the machine base;The second locking mechanism comprises a second locking bar and a second spring element, wherein the second locking bar is arranged in and slidably guided in a second sliding bore formed in the second mounting bar, the second spring element is mounted on the second locking bar, one end of the second spring element is fixedly connected to the second locking bar and the other end is fixedly connected to the second mounting bar; and when no external force acts on the second spring element, the second locking bar rests against the surface of the second locking pin under the spring force of the second spring element.

[0031] This design achieves a quick and stable connection between the lower blade holder and the blade carrier through the use of a second mounting rod, a second locking pin, and a second locking mechanism. The second locking mechanism utilizes the sliding guide of the second locking rod in the second sliding bore, as well as the spring force of the second spring element, to effectively secure and release the second locking pin. When the second locking pin is fully inserted, it is secured by the second locking rod, which is advanced by the second spring element, thus fixing the lower blade holder to the blade carrier. Disassembly requires only counteracting the spring force of the second spring element and moving the second locking rod to release the second locking pin, enabling quick removal.This not only simplifies the assembly and disassembly process of the lower blade holder, but also increases the stability of the connection and the ease of disassembly, thereby improving the maintenance efficiency and usability of the lawnmower.

[0032] Optionally, the lawnmower further includes a control device comprising a handle, a control mechanism and a control rod, wherein the handle is detachably connected to the machine base, the control mechanism is arranged on the handle and serves to receive operating commands and to control the operation of the drive device and the mowing device of the lawnmower, and the control rod is rotatably connected to the handle.

[0033] With this design, the handle is detachably connected to the base of the lawnmower. The control mechanism attached to the handle receives operator commands and is combined with the control rod, which is rotatably connected to the control mechanism and the handle at both ends. This ensures that the control mechanism only receives a start signal when the operator simultaneously holds the handle and operates the control rod, before activating the drive and cutting mechanism. This not only increases operational safety but also allows for flexible operation, terrain adaptation, and stability of the lawnmower thanks to the adjustable handle height and the structural reinforcement provided by support rods, effectively improving mowing performance and the user experience.

[0034] Optionally, the drive device further comprises a roller assembly and a drive mechanism, wherein the roller assembly is rotatably connected to the machine base and the drive mechanism serves to drive the roller assembly to rotate; the drive mechanism comprises a drive motor, and the control device further comprises a tilt sensor which is electrically connected to the drive motor; if the lawnmower tilts during travel or steering and its tilt angle exceeds 10°, the tilt sensor can immediately detect the tilt state of the lawnmower and send appropriate signals to the drive motor in order to automatically regulate and reduce the forward speed of the lawnmower;and if the speed of the output shaft of the drive motor increases or decreases, the speed of the output shaft of the mower drive motor accelerates or decelerates accordingly to ensure that the cutting speed of the mower unit is coordinated with the overall forward speed of the lawnmower.

[0035] With this concept, the tilt sensor can quickly detect the tilt state if the lawnmower tilts while driving or turning – especially if the operator simultaneously operates the control rod and presses on the handle, causing the handle to rotate the machine base and exceed a tilt angle of 10° – and send signals to the drive motor to automatically regulate and reduce the lawnmower's forward speed, effectively increasing the lawnmower's stability and safety. If the speed of the drive motor's output shaft changes, the output shaft of the mower drive motor can react immediately and make the necessary adjustments to ensure that the cutting speed of the cutting unit is always coordinated with the overall forward speed of the lawnmower. Figures: Fig. Figure 1 is a schematic representation of the lawnmower according to embodiment 1 of the present application. Fig. Figure 2 is a schematic representation of the knife carrier, the damping device and the first mowing device according to embodiment 1 of the present application. Fig. Figure 3 is a schematic representation of the knife carrier and the first mowing device according to embodiment 1 of the present application. Fig. Figure 4 is a schematic representation of the first locking device and the second locking device from a different perspective according to embodiment 1 of the present application. Fig. Figure 5 is a cross-sectional view of the first locking device and the second locking device along line AA according to embodiment 1 of the present application. Fig. Figure 6 is a schematic representation of the end plate according to embodiment 1 of the present application. Fig. Figure 7 is a schematic representation of the mower drive motor and the rotary locking device according to embodiment 1 of the present application. Fig. Figure 8 is a schematic representation of the second mowing device according to embodiment 1 of the present application. Fig. Figure 9 is an enlarged view of section A in Fig. 8. Fig. Figure 10 is a schematic representation of the lawnmower according to embodiment 2 of the present application. Fig. Figure 11 is a schematic representation of the control device according to embodiment 2 of the present application. Reference symbol:

[0036] 1 drive device; 11 machine bases; 111 mounting cylinders 12 Roller assembly; 121 Pivot axis 122 Wheel 13 Drive mechanism; 2 Mowing device; 21 Blade carriers; 211 Upper blade holders 2111 Connecting part 2112 End plate 2113 Ring seat 2114 Positioning pin 2115 Through hole 2116 Recess groove 22 First mowing device; 221 Mower drive motor 222 Roller blade 223 Locking pin 224 Support part 23 second mowing device; 231 lower blade holder 232 Lower blade 233 Grinding groove 234 Grinding collar 24 Limiting device; 241 Limiting element 3 Control device; 31 Grab handle; 311 Handle bar; 312 Connecting bar; 313 Reinforcing rod 32 Control mechanism; 33 Control rod; 34 Mounting bracket; 35 Handle; 4 First locking device; 41 first mounting rod; 411 first through-hole 412 first sliding bore; 413 mounting groove 42 first locking pin; 421 first positioning groove 43 first locking mechanism; 431 first locking rod 432 first spring element 433 first handle part 5 second locking device; 51 second mounting rod; 511 second through-hole 512 second sliding bore; 52 second locking pin; 521 second positioning groove; 53 second locking mechanism; 531 second locking bar; 532 second spring element; 533 second handle part; 6 rotary locking device; 61 drive part; 62 Rotary locking element; 621 Locking seat 622 Plug rod 623 Locking slot 7 Cable; 71 Flexible protective sleeve; 72 Rigid protective sleeve; 721 Clamping sleeve 722 Mounting part 73 Terminal block; 8 First connection device; 81 Joint rod; 9 Second connection device; 91 Connection block; 92 Feed-through opening; Designs

[0037] The present application will be described below based on the attached documents. Fig. Items 1 to 11 are described in detail. Example 1

[0038] The embodiment of the present application discloses a lawnmower. With reference to Fig. 1 The lawnmower comprises a drive device 1, a mowing unit 2 and a control device 3. The control device 3 is detachably connected to the drive device 1, and the mowing unit 2 is detachably connected to the drive device 1.

[0039] The drive device 1 comprises a machine base 11, a roller assembly 12, and a drive mechanism 13. The roller assembly 12 includes a pivot shaft 121 and two wheels 122. The pivot shaft 121 penetrates the machine base 11 and is rotatably connected to it. The two ends of the pivot shaft 121 are each rigidly connected to the two wheels 122. The drive mechanism 13 is arranged on the machine base 11 and serves to drive the pivot shaft 121 to rotate, thus moving the lawnmower forward. The drive mechanism 13 comprises a drive motor and a gearbox. The drive motor is arranged on the machine base 11 and serves to drive the gearbox, thus moving the lawnmower forward.

[0040] With reference to Fig. 2 and Fig. The mowing device 2 comprises a blade carrier 21, a first mowing device 22, and a second mowing device 23. The blade carrier 21 is detachably connected to the machine base 11. Both the first mowing device 22 and the second mowing device 23 are arranged on the blade carrier 21. The mowing function can only be achieved through the interaction of the first mowing device 22 and the second mowing device 23.

[0041] A second connecting device 9 is arranged between the first locking device 4 and the knife carrier 21, allowing the knife carrier 21 to pivot in a forward-backward direction. The second connecting device 9 comprises at least one connecting block 91. The knife carrier 21 includes an upper knife holder 211. There are two connecting blocks 91, and the undersides of both connecting blocks 91 are rotatably connected to the upper knife holder 211. The two connecting blocks 91 are parallel to each other. A through-opening 92 is formed in each connecting block 91. A mounting groove 413 is formed in the first mounting rod 41, with one side of the mounting groove 413 being open. When the connecting block 91 is mounted in the mounting groove 413, its side wall rests against the inner wall of the mounting groove 413.In this case, the axis of the first through-hole 411 coincides with the axis of the feed-through opening 92, which facilitates quick insertion and removal of the first locking pin 42 by the operator. With reference to... Fig. 2, Fig. 3, Fig. 5 and Fig. 6: To fix the knife carrier 21 to the machine base 11, a first locking device 4 for securing the knife carrier 21 is arranged on the machine base 11. The first locking device 4 comprises a first mounting rod 41, a first locking pin 42, and a first locking mechanism 43. The first mounting rod 41 is attached to the machine base 11. Its two ends each rest against the inner walls of the two connecting blocks 91. A first through-hole 411 is formed at each end of the first mounting rod 41. A through-hole 92 is formed in each connecting block 91. The axis of the first through-hole 411 coincides with the axis of the through-hole 92. Two mounting grooves 413 for the precise positioning of the connecting blocks 91 are formed in the first mounting rod 41. The two mounting grooves 413 are spaced apart and each corresponds to one of the two connecting blocks 91.One side of each mounting groove 413 is open. When the connecting block 91 is correctly installed in the mounting groove 413, its side wall rests firmly against the inner wall of the mounting groove 413, ensuring a stable installation.

[0042] With reference to Fig. In section 5, the number of both the first locking pins 42 and the first locking mechanisms 43 is two each. Each first locking pin 42 is inserted successively through a through-hole 92 and a first through-hole 411. The end part of each first locking pin 42 rests against the end of the respective through-hole 92, thereby fixing the knife carrier 21 to the machine base 11.

[0043] With reference to Fig. 3 and Fig. The upper blade holder 211 comprises at least one connecting part 2111 and at least one end plate 2112. There are two end plates 2112. The two ends of the connecting part 2111 are each detachably connected to the two end plates 2112. A recessed groove 2116 is formed in one side of each end plate 2112, which serves to guide the first mowing device 22. The side of the recessed groove 2116 facing the edge of the end plate 2112 is open. Therefore, both the assembly and disassembly processes of the end plate 2112 require only the removal of the end plate 2112 itself, without having to disassemble any other components. This typically takes only about 5 minutes and increases disassembly efficiency.

[0044] With reference to Fig. 2 and Fig. 3. At least two limiting devices 24 are arranged on the upper blade holder 211. Each limiting device 24 comprises two limiting elements 241. Both limiting elements 241 are fastened to the end plate 2112 by means of screws. The two limiting elements 241 are located on opposite sides of the connecting block 91. The two limiting elements 241 serve to limit the rotation angle of the blade carrier 21 and to ensure that the rotation angle of the blade carrier 21 about the first mounting rod 41 is 0-30°. First, the connecting block 91 is stably fixed to the first mounting rod 41 by the action of the first locking mechanism 43. The two limiting elements 241 arranged on the blade carrier 21 are located on opposite sides of the connecting block 91 and limit the rotation angle of the blade carrier 21 relative to the first mounting rod 41 to a range of 0 to 30 degrees.This ensures the stability of the mowing unit 2 during operation. On varying slopes, the blade carrier 21 of the mowing unit 2 can finely adjust itself within the limited angle of rotation. With reference to... Fig. 2 A first connecting device 8 is arranged between the machine base 11 and the first locking device 4. The first locking device 4 can pivot in a left-right direction via the first connecting device 8. Each first connecting device 8 comprises two articulated rods 81. One end of each articulated rod 81 is rotatably connected to the machine base 11, and the other end is rotatably connected to the first mounting rod 41. During mowing, if there are differences in height on both sides of the lawnmower in the mowing area, the first connecting device 8 makes the mowing process more even and efficient and reduces vibration due to uneven surfaces.

[0045] With reference to Fig. 4 and Fig. 5 Two first sliding bores 412 are formed in the upper surface of the first mounting rod 41. The first locking mechanisms 43 each correspond to one first sliding bore 412. Each first locking mechanism 43 comprises a first locking rod 431 and a first spring element 432. The first locking rod 431 is arranged in the first sliding bore 412 and slides within it. The first spring element 432 is attached to the first locking rod 431. One end of the first spring element 432 is fixedly connected to the first locking rod 431, and the other end is fixedly connected to the first mounting rod 41. Specifically, the first spring element 432 is a spring. If no external force acts on the first locking rod 431, the end of the first locking rod 431 pointing towards the first locking pin 42 presses against the surface of the first locking pin 42 under the spring force of the first spring element 432.This secures the first locking pin 42 in the first through-hole 411 of the first mounting rod 41 and thus attaches the mowing device 2 to the machine base 11.

[0046] Each first locking mechanism 43 further comprises a first handle part 433.

[0047] The first handle part 433 is located at the end of the first locking bar 431, which points away from the first mounting bar 41. The first handle part 433 is either fixedly or movably connected to the first locking bar 431. Pulling on the first handle part 433 pulls the first locking bar 431, thereby releasing the locking effect of the first locking bar 431 on the mowing device 2. The operator can then manually mount and dismount the upper blade holder 211 without tools, enabling quick assembly / disassembly and saving working time. The first handle part 433 is a pull ring or a handle opening. The pull ring is either fixedly or movably connected to the first locking bar 431. Simultaneously, a first positioning groove 421 is formed in the arcuate outer wall of the first locking pin 42. The first positioning groove 421 is annular, and its width corresponds to the diameter of the first locking pin 42.If no external force acts on the first locking pin 42, the spring force of the first spring element 432 presses the end part of the first locking rod 431 against the base of the first positioning groove 421. The first positioning groove 421 can prevent axial movement of the first locking pin 42 and thus increases the strength with which the knife carrier 21 is fixed to the machine base 11.

[0048] With reference to Fig. The first mowing device 22 comprises a mowing drive motor 221 and a roller blade 222. The roller blade 222 is rotatably mounted on the upper blade holder 211. The mowing drive motor 221 is mounted on the upper blade holder 211 and is located at one end of the roller blade 222. The output shaft of the mowing drive motor 221 is fixedly connected to the end part of the roller blade 222. The mowing drive motor 221 serves to drive the rotation of the roller blade 222.

[0049] With reference to Fig. 2, Fig. 3 and Fig. The mower drive motor 221 is detachably connected to the upper blade holder 211. A rotary locking device 6 for securing the mower drive motor 221 is arranged on the upper blade holder 211. The rotary locking device 6 comprises a drive element 61 and two rotary locking elements 62. The two rotary locking elements 62 are located on opposite sides of the mower drive motor 221. One end of each rotary locking element 62 is rotatably connected to the blade carrier 21. The two ends of the drive element 61 are each detachably connected to the two rotary locking elements 62. Alternatively, the two ends of the drive element 61 can be formed integrally with the end parts of the two rotary locking elements 62.

[0050] Each rotary locking element 62 comprises a locking seat 621 and a connecting rod 622. The locking seat 621 is rotatably connected to the knife carrier 21. The end of the connecting rod 622 closest to the locking seat 621 is integrally formed with it. The drive element 61 is U-shaped. A plug-in opening is formed at each end of the drive element 61. The end of the connecting rod 622 pointing away from the locking seat 621 is positioned in the plug-in opening. The connecting rod 622 and the plug-in opening are plug-fit, thereby fixing the two locking seats 621 to the two ends of the drive element 61. This improves the ease of assembly and disassembly of the rotary locking device 6 for the operator.

[0051] On the side of each locking seat 621 facing the mower drive motor 221, an arc-shaped locking slot 623 is formed. When the locking element 62 is rotated into the vertical position, the end of the locking slot 623 facing the mower drive motor 221 is open, which facilitates subsequent locking operations. Locking pins 223 are arranged on opposite sides of the mower drive motor 221. The connection between the locking pins 223 and the mower drive motor 221 can be fixed or rotatable. Both locking pins 223 are rotatably connected to the mower drive motor 221. This reduces friction between the locking pins 223 and the rotary locking elements 62 during the fixing or dismantling of the mower drive motor 221, thus making the process smoother.At the same time, the non-standard arc-shaped form of the locking slot 623 prevents the rotary locking element 62 from rotating easily after the mower drive motor 221 has been locked. This ensures that the locking pins 223 do not slip out of the locking slot 623, thus increasing the strength with which the rotary locking element 62 secures the mower drive motor 221.

[0052] A ring seat 2113 is fixedly attached to the side of the upper blade holder 211 facing the mower drive motor 221. Two positioning pins 2114 are fixedly attached to the ring seat 2113. Correspondingly, two positioning holes are formed at the end of the mower drive motor 221. The positioning pins 2114 each correspond to one of these positioning holes. When the mower drive motor 221 is mounted on the upper blade holder 211, the positioning pins 2114 engage in the positioning holes. The two positioning pins 2114 have a positioning effect on the mower drive motor 221 and increase the strength with which the mower drive motor 221 is mounted on the upper blade holder 211.

[0053] A through-hole 2115 is formed in the side of the upper blade holder 211 facing the mower drive motor 221. When the positioning pins 2114 of the upper blade holder 211 are inserted into the positioning holes at the end of the mower drive motor 221, the output shaft of the mower drive motor 221 engages one end of the roller blade 222. Therefore, during the drive of the pivot axis 121, the mower drive motor 221 causes the roller blade to rotate frictionlessly.

[0054] With reference to Fig. 3, Fig. 7 and Fig. 8 The second mowing device 23 is detachably connected to the upper blade holder 211 and is located below the first mowing device 22. The second mowing device 23 comprises a lower blade holder 231 and a lower blade 232. The lower blade holder 231 is detachably connected to the upper blade holder 211. A second locking device 5 for securing the lower blade holder 231 is arranged on the upper blade holder 211. When the lower blade holder 231 is fixed to the upper blade holder 211, the lower blade 232 is located directly below the roller blade 222. When the lawnmower moves forward or backward, the roller blade 222 begins to rotate due to the drive of the mower drive motor 221. During the rotation of the roller blade 222, it works in conjunction with the lower blade 232 below it, enabling the lawnmower to perform the mowing function efficiently.

[0055] The upper surface of the lower blade 232 is inclined. The base of the roller blade 222 rests against the upper surface of the lower blade 232. A strip-shaped grinding groove 233 is formed in the upper surface of the lower blade 232. The inner side wall of one side of the grinding groove 233 is provided with a grinding collar 234. When the mower drive motor 221 drives the roller blade 222 in a forward direction, the roller blade 222 and the lower blade 232 work together to perform the mowing. When the mower drive motor 221 drives the roller blade 222 in a reverse direction, the contact between the lower blade 232 and the roller blade 222 creates an automatic sharpening function. This maintains the sharpness of the roller blade 222 without the need for disassembly, which significantly improves mowing performance and ease of maintenance.

[0056] With reference to Fig. 4 and Fig. The second locking device 5 comprises a second mounting rod 51, a second locking pin 52, and a second locking mechanism 53. The second mounting rod 51 is attached to the machine base 11. Its two ends each rest against the inner walls of the two connecting blocks 91. A second through-hole 511 is formed at each end of the second mounting rod 51. A through-hole 92 is formed in each connecting block 91. The axis of the second through-hole 511 coincides with the axis of the through-hole 92. There are two second locking pins 52 and two second locking mechanisms 53. Every second locking pin 52 is inserted successively through a through-hole 92 and a second through-hole 511. The end portion of each second locking pin 52 rests against the end of the respective through-hole 92, thereby fixing the knife carrier 21 to the machine base 11.

[0057] With reference to Fig. 3, Fig. 4 and Fig. Two second sliding bores 512 are formed in the upper surface of the second mounting rod 51. The second locking mechanisms 53 each correspond to one of these second sliding bores 512. Each second locking mechanism 53 comprises a second locking rod 531 and a second spring element 532. The second locking rod 531 is arranged in and slides within the second sliding bore 512. The second spring element 532 is attached to the second locking rod 531. One end of the second spring element 532 is fixedly connected to the second locking rod 531, and the other end is fixedly connected to the second mounting rod 51. Specifically, the second spring element 532 is a spring. If no external force acts on the second locking bar 531, the end of the second locking bar 531 pointing towards the second locking pin 52 presses against the surface of the second locking pin 52 under the spring force of the second spring element 532.This secures the second locking pin 52 in the second through-hole 511 of the second mounting rod 51, attaches the blade carrier 21 to the machine base 11, and thus secures the mowing unit 2 to the machine base 11. This increases the ease of use for the operator when assembling and disassembling the mowing unit 2.

[0058] Every second locking mechanism 53 further comprises a second handle part 533. The second handle part 533 is arranged at the end of the second locking bar 531, which points away from the second mounting bar 51. The second handle part 533 is either fixedly or movably connected to the second locking bar 531. Pulling on the second handle part 533 pulls the second locking bar 531, thereby releasing the locking effect of the second locking bar 531 on the mowing device 2. The operator can manually mount and dismount the upper blade holder 211 without tools, enabling quick assembly / disassembly and saving working time. Specifically, the second handle part 533 is a pull ring. The pull ring is either fixedly or movably connected to the second locking bar 531. Of course, in this embodiment, the second handle part 533 can also be a handle opening formed in the second locking bar 531.

[0059] With reference to Fig. 5 Simultaneously, a second positioning groove 521 is formed in the arc-shaped outer wall of the second locking pin 52. The second positioning groove 521 is annular. When no external force acts on the second locking pin 52, the spring force of the second spring element 532 presses the end part of the second locking bar 531 against the base of the second positioning groove 521. The second positioning groove 521 has a positioning effect on the second locking pin 52 and can prevent axial movement of the second locking pin 52, thus increasing the strength with which the knife carrier 21 is fixed to the machine base 11.

[0060] With reference to Fig. A battery unit is arranged on the machine base 11. A cable 7 runs between the battery unit and the mower drive motor 221. The end of the cable 7 near the battery unit is permanently connected to it. The end of the cable 7 near the mower drive motor 221 is also permanently connected to it. A flexible protective sleeve 71 is fitted around the end of the cable 7 near the mower drive motor 221. One end of the flexible protective sleeve 71 is connected to the mower drive motor 221. A rigid protective sleeve 72 is detachably attached to the mower drive motor 221. The end of the flexible protective sleeve 71 near the mower drive motor 221 is located inside the rigid protective sleeve 72. The flexible protective sleeve 71 and the rigid protective sleeve 72 reduce the degree of curvature of the cable 7 and extend its service life.

[0061] The rigid protective cover 72 comprises two structurally identical and symmetrical clamping sleeves 721. Their inner walls rest against each other. Two adjacent clamping sleeves 721 are fastened by screws and nuts. Support parts 224 are integrally formed on the upper side of the housing of the mower drive motor 221. The upper surfaces of both support parts 224 are flat. Mounting parts 722 are integrally formed on opposite sides of each clamping sleeve 721. The inner walls of the two mounting parts 722 rest against each other. The lower surfaces of both mounting parts 722 rest on the upper surface of the support part 224. A clamping block 73 is arranged on the upper side of each of the two mounting parts 722. The lower surface of each clamping block 73 rests simultaneously on the upper surfaces of both mounting parts 722. Two screws are inserted through each clamping block 73. Each screw corresponds to one mounting part 722.Each screw penetrates a mounting part 722 and is screwed into the support part 224. This increases the ease of use for the operating personnel when assembling and disassembling the rigid protective cover 72.

[0062] With reference to Fig. The control unit 3 includes a handle 31. On the side of the machine base 11 facing away from the mowing unit 2, two parallel mounting cylinders 111 are integrally formed. The end of each mounting cylinder 111 that points away from the machine base 11 is open. The handle 31 comprises a grip rod 311 and two connecting rods 312. The two ends of the grip rod 311 are each firmly connected to the two connecting rods 312. Each connecting rod 312 corresponds to one mounting cylinder 111. The connecting rods 312 and the mounting cylinders 111 are plug-in connected, thereby fixing the handle 31 to the machine base 11. In addition, several through-holes are arranged along the longitudinal axis of each mounting cylinder 111.These screw holes facilitate the assembly and disassembly of the handrail 31 and allow the operator to adjust its height as needed to accommodate different operating requirements and body sizes. The handrail 31 also includes a reinforcing bar 313. The two ends of the reinforcing bar 313 are each firmly connected to the two connecting bars 312, which increases the overall structural strength of the handrail 31.

[0063] The control device 3 further comprises a control mechanism 32 and a control rod 33. The control mechanism 32 is arranged on one of the connecting rods 312 and is electrically connected to the drive mechanism 13, which facilitates the control of the operation of the drive mechanism 13. Simultaneously, the control mechanism 32 is electrically connected to the mower drive motor 221. It is responsible for receiving commands from the operator and controlling the output shaft of the mower drive motor 221 in a forward or reverse direction, thereby realizing the mowing or grinding function.

[0064] To ensure operational safety, the control mechanism 32 is 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 handle 31. During operation, the operator must simultaneously hold the control rod 33 and the handle 31 and push the control rod 33 towards the handle 31 until they touch. At this moment, the control mechanism 32 receives a start signal and then controls the starting of the drive unit 1, causing the lawnmower to move forward and perform the mowing task. If the operator only holds the handle 31 without pushing the control rod 33, the control mechanism 32 cannot receive a start signal, and the lawnmower remains stationary, thus effectively preventing safety risks due to operator error.

[0065] The control unit 3 also includes a tilt sensor. The tilt sensor is located on the machine base 11 and is electrically connected to the drive motor. If the lawnmower tilts while driving or steering, and the tilt angle is greater than 10° due to the operator's input, the tilt sensor can immediately detect the tilt of the machine base 11 and send corresponding signals to the drive motor to automatically regulate and reduce the lawnmower's forward speed. Through the integration of an intelligent speed control and balance control system, the lawnmower achieves automatic coordination of mowing speed and forward speed.While the lawnmower is moving forward or turning, if the operator simultaneously presses the control rod 33 and the handle 31, causing the handle 31 to rotate the machine base 11, the tilt sensor can quickly detect when the tilt angle of the machine base 11 exceeds 10° and send signals to the drive motor to automatically regulate and reduce the lawnmower's forward speed. This effectively increases the lawnmower's stability and safety, improving overall work performance and quality. When the operator presses the control rod 33 and starts the lawnmower, the drive motor begins to operate and propels the lawnmower forward. Simultaneously, the control mechanism 32, according to the operator's instructions, controls the output shaft of the mower drive motor 221 in a forward or reverse direction to perform the mowing or grinding function.When the speed of the drive motor's output shaft increases or decreases, the speed of the mower drive motor's output shaft accelerates or decelerates accordingly under the influence of the tilt sensor to ensure that the cutting speed of the mower unit 2 is coordinated with the overall forward speed of the lawnmower. If the speed of the drive motor's output shaft changes, the speed of the mower drive motor's output shaft can react immediately and make the necessary adjustments to ensure that the cutting speed of the mower unit 2 is always coordinated with the overall forward speed of the lawnmower.

[0066] The operating principle of the above embodiment is as follows: By inserting the first locking pin 42 through the blade carrier 21, the through-hole 92, and the through-hole of the first mounting rod 41, and by locking the first locking pin 42 in the first locking mechanism 43 by means of the first locking rod 431, which slides in the first displacement bore 412 and is secured by the spring force of the first spring element 432, a stable connection is established between the blade carrier 21 and the machine base 11. For disassembly, the user simply needs to move the first locking rod 431 to counteract the spring force and release the first locking pin 42, thus completing the quick disassembly of the mowing unit 2. This process requires no tools, simplifies operation, and increases maintenance efficiency and ease of use. Example 2

[0067] With reference to Fig. 10 and Fig. 11. Exemplary embodiment 2 differs from exemplary embodiment 1 in the control device 3: The control device 3 in this exemplary embodiment also includes a handgrip 31. The handgrip 31 contains a reinforcing rod 313 and two connecting rods 312. The two ends of the reinforcing rod 313 are each firmly connected to the two connecting rods 312. The two connecting rods 312 penetrate a mounting bracket 34 and are firmly connected to it. A mounting bracket 34 and a handle 35 are also added to the handgrip 31, which makes the handgrip 31 more stable. With reference to Fig. 2 and Fig.In embodiment 10, the control mechanism 32 is arranged at the end of the mounting bracket 34, which allows the control mechanism 32 to conveniently receive commands from the operator and to precisely control the mower drive motor 221 and the drive mechanism 13. Similar to embodiment 1, the control mechanism 32 is also electrically connected to the drive mechanism 13 and the mower drive motor 221. It is responsible for receiving commands from the operator and controlling the output shaft of the mower drive motor 221 in a forward or reverse direction, thereby realizing the mowing or grinding function.

[0068] The control mechanism 32 in this embodiment is also equipped with a control rod 33. Both ends of the control rod 33 are rotatably connected to the mounting bracket 34 and electrically connected to the control mechanism 32. During operation, the operator must simultaneously hold the control rod 33 and the handle 31 and push the control rod 33 towards the handle 31 until they touch. At this moment, the control mechanism 32 first receives a start signal and then controls the starting of the drive unit 1, causing the lawnmower to move forward and perform the mowing task. If the operator only holds the handle 31 without pushing the control rod 33, the control mechanism 32 cannot receive a start signal, and the lawnmower remains stationary, thus effectively preventing safety risks due to operator error.

[0069] All the examples mentioned above are preferred embodiments of the present application and do not limit the scope of protection of this application. Therefore, all equivalent modifications based on the structure, form, or principle of this application are to be included within the scope of protection of this application.

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