A dustproof and waterproof lawnmower

Abstract

This invention discloses a dustproof and waterproof lawnmower, belonging to the field of garden tool technology. It solves the problem of poor waterproof and dustproof performance in existing lawnmowers. The technical solution mainly involves an adjustment mechanism including an adjustment knob and a transmission screw. The first end of the transmission screw is toothed into the adjustment knob, and the second end is connected to the cutting mechanism. The machine body has a mounting base for the adjustment knob. The adjustment knob includes an outer ring and an inner ring. The inner sidewall of the inner ring has a first toothed ring. The mounting base has a through hole for the transmission screw to pass through and an annular waterproof rib surrounding the through hole. The transmission screw is toothed into the first toothed ring, and the annular waterproof rib protrudes upwards from the surface of the mounting base to extend between the inner and outer rings. This invention is mainly used to effectively prevent moisture and dust from entering the lawnmower.

Description

Technical Field

[0001] This invention relates to the field of garden tools technology, and in particular to a dustproof and waterproof lawnmower. Background Technology

[0002] To meet the needs of different lawn mowing heights, existing lawnmowers such as CN216532644U and CN209489159U disclose a blade height adjustment mechanism for adjusting the blade height. This mechanism includes an adjustment knob and a drive screw. The adjustment knob is generally located on the top of the lawnmower, and the top of the lawnmower has a through hole through which the drive screw passes and connects to the adjustment knob. The other end of the drive screw is connected to the cutting mechanism. By rotating the adjustment knob on the blade height adjustment assembly, the blade is raised or lowered to select the appropriate height. However, this mechanism lacks a waterproof and dustproof structure, allowing moisture and dust to easily enter the lawnmower through the through hole, affecting the lawnmower's service life. Summary of the Invention

[0003] The purpose of this invention is to provide a dustproof and waterproof lawnmower, which solves the problem of poor waterproof and dustproof performance of existing lawnmowers. It can effectively prevent moisture and dust from entering the lawnmower and ensure the service life of the lawnmower.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a dustproof and waterproof lawnmower, comprising a body, a cutting mechanism disposed on the body, and an adjustment mechanism for adjusting the height of the cutting mechanism on the body. The adjustment mechanism includes an adjustment knob and a transmission screw. The first end of the transmission screw is toothed with the adjustment knob, and the second end of the transmission screw is drivenly connected to the cutting mechanism. The body is provided with a mounting base for mounting the adjustment knob. The adjustment knob includes an outer ring and an inner ring. The inner sidewall of the inner ring is provided with a first toothed ring. The mounting base is provided with a through hole for the transmission screw to pass through and an annular waterproof rib arranged around the through hole. The transmission screw is toothed with the first toothed ring, and the annular waterproof rib protrudes upward relative to the surface of the mounting base to extend between the inner ring and the outer ring.

[0005] After adopting the above technical solution, the present invention has the following advantages: First, through the geared design of the adjustment knob and the transmission screw, the user can easily and accurately adjust the height of the cutting mechanism without the need for tools, thus improving work efficiency. Second, the adjustment knob includes an outer ring and an inner ring, which together form a double barrier against dust and moisture, effectively reducing the entry of dust and moisture into the lawnmower through the through hole. Then, the inner wall of the inner ring is provided with a first gear ring, and an annular waterproof rib is provided around the through hole on the mounting base. The annular waterproof rib protrudes upward relative to the surface of the mounting base to extend between the inner ring and the outer ring. The inner ring is located inside the annular waterproof rib, and the outer ring is located outside the annular waterproof rib, making the annular waterproof rib significantly higher than the surface of the mounting base. This effectively blocks dust and moisture from the external environment outside the annular waterproof rib, effectively reducing the entry of dust and moisture into the first gear ring, ensuring the stability of the geared engagement between the first gear ring and the transmission screw, and also reducing the entry of dust and moisture into the lawnmower, protecting the reliability of the electronic and mechanical parts inside the lawnmower, and ensuring the overall service life of the lawnmower.

[0006] Furthermore, the annular waterproof reinforcement is fitted to the outer wall of the inner ring.

[0007] By adopting the aforementioned technical solution, the design of the annular waterproof rib tightly attached to the outer wall of the inner ring ensures that the gap between the annular waterproof rib and the outer wall of the inner ring is effectively sealed during the rotation of the adjustment knob, forming a continuous sealing interface. This prevents moisture, dust, and other external pollutants from entering the lawnmower, improving the lawnmower's waterproof and dustproof rating and ensuring its service life.

[0008] Furthermore, the machine body is provided with an elastic sealing ring surrounding the through hole, and the inner side of the elastic sealing ring is provided with a flexible lip. The transmission screw passes through the elastic sealing ring and fits against the flexible lip.

[0009] Using the aforementioned technical solution, the elastic sealing ring is set around the through hole, which can effectively prevent dust, moisture or other external pollutants from entering the lawnmower and protect the internal structure from environmental impact. Secondly, the flexible lip fits into the transmission screw, which can reduce the direct friction between the two, reduce the heat and wear generated by friction, protect the surface of the transmission screw from damage, and also reduce operating noise.

[0010] Furthermore, the machine body is provided with a waterproof groove surrounding the through hole, and the elastic sealing ring is inserted into the waterproof groove.

[0011] By using the aforementioned technical solution, the elastic sealing ring can be accurately positioned by inserting it into the waterproof groove, ensuring that it will not shift or fall off when the equipment is running or subjected to external forces. This provides a more stable and reliable sealing effect and also makes the installation of the elastic sealing ring simpler and faster.

[0012] Furthermore, the outer ring includes a water-blocking section and a flow-guiding section extending from the water-blocking section. The water-blocking section is vertically arranged, and the flow-guiding section bends downward from the lower end of the water-blocking section toward the side away from the inner ring.

[0013] By adopting the aforementioned technical solution, the vertical setting of the water-blocking section can directly block most of the water flow that directly impacts the machine, effectively preventing water from splashing into or penetrating into the adjustment knob. The guide section bends downward from the lower end of the water-blocking section away from the inner ring, which can guide the water flow in a specific direction instead of directly impacting the inner ring or the machine body. This reduces the direct impact of water on the internal structure and promotes the rapid discharge of water, reducing the residence time and residual amount of water droplets on the surface, which helps to keep the lawnmower dry.

[0014] Furthermore, the guide section is provided with an outer step, and the mounting base is provided with an inner step that engages with the outer step.

[0015] By adopting the above technical solution, the tight interlocking between the steps forms a sealed barrier, which helps to prevent external pollutants such as moisture and dust from penetrating the interior through the gaps, further enhancing the waterproof and dustproof capabilities of the lawnmower. The step interlocking method simplifies the assembly process.

[0016] Furthermore, the adjustment knob also includes an operating part for user operation, the body is provided with a waterproof cover, the waterproof cover includes a shielding part and an opening part, the operating part extends through the opening part to be located on the outside of the body, and the shielding part covers the inner and outer rings.

[0017] With the above technical solution, the operating part protrudes through the opening of the waterproof cover and is located outside the machine body, ensuring that the user can directly operate the knob without damaging the waterproof structure, without affecting the intuitiveness and convenience of control. The shielding part of the waterproof cover covers the inner and outer rings of the knob, effectively preventing moisture, dust and other contaminants from entering the equipment.

[0018] Furthermore, the top of the shielding part and the outer ring form a water collection cavity that communicates with the opening, and a drain outlet is formed between the lower end of the shielding part and the lower end of the outer ring, and the drain outlet communicates with the water collection cavity.

[0019] By adopting the above technical solution, the water collection chamber can effectively collect water on the surface of the equipment, prevent rainwater from accumulating in the operating part, collect it through the water collection chamber and discharge it through the drain outlet, protect the inside of the lawnmower from moisture, and reduce the risk of short circuits, corrosion and other risks.

[0020] Furthermore, the adjustment knob is also provided with a positioning spring with a central protrusion, the outer wall of the annular waterproof rib is provided with a spring slot, the inner wall of the outer ring is provided with a second toothed ring, the two ends of the positioning spring are engaged in the spring slot, and the central protrusion of the positioning spring is engaged in the tooth groove of the second toothed ring.

[0021] Using the above technical solution, the middle protrusion of the positioning spring is engaged in the tooth groove of the second gear ring. This mechanical interlocking structure provides additional stability and durability. Even when subjected to vibration or external force, the adjustment knob is not easily displaced, ensuring the stability of the setting. Each step of the adjustment knob's rotation provides a clear positioning feel, allowing the user to intuitively feel the change in adjustment position. Users can more accurately adjust to the desired position, improving the accuracy of operation.

[0022] Furthermore, the cutting mechanism includes a mounting frame, a protective cover, a motor, and a cutting disc. The protective cover is located above the cutting disc and is fixedly connected to the mounting frame. The cutting disc is mounted on the output shaft of the motor. The motor is fixedly connected to the mounting frame. The machine body is provided with at least one lifting slide rail. The mounting frame is slidably connected to the lifting slide rail. The mounting frame is provided with a first rotating gear pattern. The second end of the transmission screw is provided with a second rotating gear pattern that meshes with the first rotating gear pattern.

[0023] The above technical solution, which features a sliding connection between at least one lifting slide rail on the machine body and the mounting frame, makes the adjustment of the cutting height more stable. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the dustproof and waterproof lawnmower of the present invention;

[0026] Figure 2 In this invention Figure 1 Enlarged structural diagram at point A;

[0027] Figure 3 This is a schematic diagram of the mounting base in this invention;

[0028] Figure 4 This is a partial structural cross-sectional view of the dustproof and waterproof lawnmower of the present invention;

[0029] Figure 5 This is a cross-sectional view of a portion of the structure of the dustproof and waterproof lawnmower of the present invention from another perspective;

[0030] Figure 6 This is a schematic diagram of the adjustment knob in this invention;

[0031] Figure 7 This is a cross-sectional view of the adjustment knob in this invention;

[0032] In the diagram, 100 is the body; 101 is the waterproof groove; 110 is the adjustment knob; 111 is the inner ring; 112 is the outer ring; 1121 is the water-blocking section; 1122 is the flow guide section; 1123 is the outer step; 113 is the first gear ring; 114 is the operating part; 115 is the rotating shaft; 116 is the second gear ring; 120 is the transmission screw; 121 is the second rotating gear groove; 130 is the mounting base; 131 is the through hole; and 132 is the annular waterproof rib. 133. Inner step; 134. Fixing groove; 135. Spring clip slot; 140. Elastic sealing ring; 141. Flexible lip; 150. Covering part; 151. Opening part; 152. Drain outlet; 153. Water collection chamber; 160. Mounting bracket; 1601. First rotating gear pattern; 161. Protective cover; 162. Motor; 163. Cutting blade; 164. Lifting slide rail; 165. Buffer spring; 170. Positioning spring. Detailed Implementation

[0033] This invention provides a dustproof and waterproof lawnmower, including a body, a cutting mechanism mounted on the body, and an adjustment mechanism for adjusting the height of the cutting mechanism on the body. The adjustment mechanism includes an adjustment knob and a transmission screw. The first end of the transmission screw is toothed with the adjustment knob, and the second end of the transmission screw is drivenly connected to the cutting mechanism. The body is provided with a mounting base for mounting the adjustment knob. The adjustment knob includes an outer ring and an inner ring. The inner sidewall of the inner ring is provided with a first toothed ring. The mounting base is provided with a through hole for the transmission screw to pass through and an annular waterproof rib arranged around the through hole. The transmission screw is toothed with the first toothed ring, and the annular waterproof rib protrudes upward relative to the surface of the mounting base to extend between the inner ring and the outer ring.

[0034] First, the geared design of the adjustment knob and transmission screw allows users to easily and precisely adjust the height of the cutting mechanism without the need for tools, improving work efficiency. Second, the adjustment knob includes an outer ring and an inner ring, which together act as a double barrier against dust and moisture, effectively reducing the amount of dust and moisture entering the lawnmower through the through hole. Third, the inner wall of the inner ring has a first gear ring, and an annular waterproof rib is set around the through hole on the mounting base. This annular waterproof rib protrudes upwards relative to the surface of the mounting base and extends between the inner and outer rings. The inner ring is located inside the annular waterproof rib, and the outer ring is located outside the annular waterproof rib, making the annular waterproof rib on the mounting base significantly higher than the surface of the mounting base. This effectively blocks dust and moisture from the external environment from entering the first gear ring, ensuring the stability of the geared engagement between the first gear ring and the transmission screw. It also reduces the amount of dust and moisture entering the lawnmower, protecting the reliability of the electronic and mechanical parts inside the lawnmower and ensuring the overall service life of the lawnmower.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0037] It should be understood that in the various embodiments of the present invention, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0038] It should be understood that in this invention, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0039] It should be understood that in this invention, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.

[0040] The technical solution of the present invention will be described in detail below with reference to specific embodiments. The following specific embodiments may be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0041] like Figures 1 to 7As shown, the present invention provides a dustproof and waterproof lawnmower, including a body 100, a cutting mechanism disposed on the body 100, and an adjustment mechanism for adjusting the height of the cutting mechanism on the body 100. The adjustment mechanism includes an adjustment knob 110 and a transmission screw 120. The first end of the transmission screw 120 is geared to the adjustment knob 110, and the second end of the transmission screw 120 is drivenly connected to the cutting mechanism. The cutting mechanism includes a mounting frame 160, a protective cover 161, a motor 162, and a cutting disc 163. The protective cover 161 is disposed above the cutting disc 163 and is fixedly connected to the mounting frame 160. The cutting disc 163 is disposed on the output shaft of the motor 162, and the motor 162 is fixedly connected to the mounting frame 160. A lifting slide rail 164 is provided on the body 100, and the mounting frame 160 is slidably connected to the lifting slide rail 164. The mounting frame 160 is provided with a first rotating gear pattern 1601. The second end of the transmission screw 120... The machine body 100 is provided with a second rotating gear 121 that meshes with the first rotating gear 1601. The machine body 100 is provided with a mounting base 130 for mounting the adjustment knob 110. The adjustment knob 110 includes an outer ring 112 and an inner ring 111. The inner side wall of the inner ring 111 is provided with a first gear ring 113. The mounting base 130 is provided with a through hole 131 for the transmission screw 120 to pass through. The transmission screw 120 is meshed with the first gear ring 113. By rotating the adjustment knob 110, the transmission screw 120 is driven to rotate. The rotation of the transmission screw 120 drives the mounting frame 160 to rise and fall along the lifting slide rail 164, thereby driving the cutter head to rise and fall. Users can easily and accurately adjust and select the appropriate cutting height without the need for tools, which improves work efficiency. The design of the inner ring 111 and the outer ring 112 can also form a double barrier against dust and moisture, effectively reducing the entry of dust, moisture and other impurities into the lawnmower through the through hole 131.

[0042] To reduce the entry of dust, moisture, and other impurities into the lawnmower, the mounting base 130 is provided with an annular waterproof rib 132 surrounding the through hole 131. The annular waterproof rib 132 protrudes upward relative to the surface of the mounting base 130 and extends between the inner ring 111 and the outer ring 112, making the annular waterproof rib 132 significantly higher than the surface of the mounting base 130. This effectively blocks dust and moisture from the external environment from entering the annular waterproof rib 132, thereby reducing the entry of dust and moisture into the first gear ring 113. This ensures the stability of the gear engagement between the first gear ring 113 and the transmission screw 120, and also reduces the entry of dust and moisture into the lawnmower, protecting the reliability of the electronic and mechanical parts inside the lawnmower and ensuring the overall service life of the lawnmower.

[0043] The annular waterproof rib 132 fits against the outer wall of the inner ring 111. The design of the annular waterproof rib 132 closely fitting against the outer wall of the inner ring 111 ensures that the gap between the annular waterproof rib 132 and the outer wall of the inner ring 111 is effectively sealed during the rotation of the adjustment knob 110, forming a continuous sealing interface. This prevents moisture, dust and other external pollutants from entering the lawnmower, improving the lawnmower's waterproof and dustproof rating and ensuring its service life.

[0044] Specifically, the adjustment knob 110 includes an operating section 114 for user operation. A waterproof cover is provided on the body 100, comprising a shielding section 150 and an opening 151. The operating section 114 extends through the opening 151 to the outside of the body 100, ensuring that the user can directly operate the knob without damaging the waterproof structure, thus maintaining intuitive and convenient control. The shielding section 150 covers the inner ring 111 and the outer ring 112, effectively preventing moisture, dust, and other contaminants from entering the equipment.

[0045] Since water can enter through the opening 151, in order to reduce water accumulation, the top of the shield 150 and the outer ring 112 form a water collection cavity 153 that communicates with the opening 151. The water collection cavity 153 can effectively collect water on the surface of the equipment and prevent rainwater from accumulating in the operating part 114. A drain outlet 152 is formed between the lower end of the shield 150 and the lower end of the outer ring 112. The drain outlet 152 communicates with the water collection cavity 153. The water is collected through the water collection cavity 153 and discharged through the drain outlet 152, protecting the inside of the lawnmower from moisture and reducing the risk of short circuits, corrosion, etc.

[0046] Secondly, the outer ring 112 includes a water-blocking section 1121 and a guide section 1122 extending from the water-blocking section 1121. The water-blocking section 1121 is vertically set and can directly block most of the water flow that directly impacts it, effectively preventing water from splashing into or penetrating into the adjustment knob 110. The guide section 1122 bends downward from the lower end of the water-blocking section 1121 towards the side away from the inner ring 111, which can guide the water flow in a specific direction instead of directly impacting the inner ring 111 or the body 100. This reduces the direct impact of water on the internal structure and promotes the rapid discharge of water, reducing the residence time and residual amount of water droplets on the surface, which helps to keep the lawnmower dry.

[0047] Furthermore, the guide section 1122 is provided with an outer step 1123, and the mounting base 130 is provided with an inner step 133 that engages with the outer step 1123. The tight engagement of the outer step 1123 and the inner step 133 forms a sealing barrier, which helps to prevent external pollutants such as moisture and dust from entering the interior through gaps, further enhancing the waterproof and dustproof capabilities of the lawnmower. The step engagement method also simplifies the assembly process.

[0048] Furthermore, the body 100 is provided with an elastic sealing ring 140 surrounding the through hole 131. The inner side of the elastic sealing ring 140 is provided with a flexible lip 141. The transmission screw 120 passes through the elastic sealing ring 140 and fits against the flexible lip 141. The elastic sealing ring 140 surrounding the through hole 131 can effectively prevent dust, moisture or other external pollutants from entering the lawnmower and protect the internal structure from environmental influences. Secondly, the flexible lip 141 fits against the transmission screw 120, which can reduce the direct friction between the two, reduce the heat and wear generated by friction, protect the surface of the transmission screw 120 from damage, and also reduce operating noise.

[0049] To further prevent dust, moisture, or other external contaminants from entering the through-hole 131, the machine body 100 is provided with a waterproof groove 101 surrounding the through-hole 131. This effectively prevents moisture from seeping into the lawnmower along the edge of the through-hole 131, especially during rainy days or when cleaning the equipment. This significantly improves the equipment's waterproof capability, protecting internal electronic components and mechanical structures from moisture damage. The elastic sealing ring 140 is inserted into the waterproof groove 101. By inserting the elastic sealing ring 140 into the waterproof groove 101, it ensures accurate positioning and prevents displacement or detachment during equipment operation or under external force, thus providing a more stable and reliable seal. It also makes installing the elastic sealing ring 140 easier and faster.

[0050] To facilitate the assembly of the adjustment knob 110, a fixing groove 134 is provided on the mounting base 130, and a rotating shaft 115 is provided on the adjustment knob 110. The rotating shaft 115 passes through the fixing groove 134 so that the first gear ring 113 and the transmission screw 120 mesh with each other. The assembly process becomes simpler and more direct, and the alignment and connection between the adjustment knob 110 and the transmission mechanism can be completed without complicated alignment or adjustment steps, thus improving assembly efficiency.

[0051] To make the lifting and lowering of the cutting disc 163 more stable, a buffer spring 165 is provided between the protective cover 161 and the machine body 100. On the one hand, it can buffer the lifting and lowering of the cutting disc 163, making the lifting and lowering of the cutting disc 163 more stable. On the other hand, it can also limit the lifting and lowering stroke of the cutting disc 163 to prevent the cutting disc 163 from being too high or too low, thus ensuring the cutting effect.

[0052] Furthermore, the adjustment knob 110 is also equipped with a centrally protruding positioning spring 170, and the outer wall of the annular waterproof rib 132 is provided with a spring slot 135. The inner wall of the outer ring 112 is provided with a second toothed ring 116. The two ends of the positioning spring 170 are engaged in the spring slot 135, and the central protruding section of the positioning spring 170 is engaged in the tooth groove of the second toothed ring 116. This mechanical interlocking structure provides additional stability and durability. Even when subjected to vibration or external force, the adjustment knob 110 is not easily displaced, ensuring that the setting remains stable. Every step of the adjustment knob 110's rotation provides a clear positioning feel, allowing the user to intuitively feel the change in adjustment position. Users can more accurately adjust to the desired position, improving the accuracy of operation.

[0053] Understandably, in other embodiments, the machine body may also be equipped with two, three, four, five, or other suitable lifting slide rails. The configuration of multiple lifting slide rails can evenly distribute the weight of the mounting frame and the dynamic load during operation. Compared to a single slide rail, this significantly improves the stability and load-bearing capacity of the entire system, especially when performing heavy-duty cutting or operating on uneven ground. It maintains good balance and maneuverability. The multi-slide rail system can more precisely control the up-and-down movement of the mounting frame, reducing skewing and shaking, and ensuring accurate adjustment of the cutting depth. At the same time, the increased number of lifting slide rails provides more support points for the mounting frame, making height adjustments smoother and more flexible.

[0054] Understandably, in other embodiments, the annular waterproof rib may also conform to the inner wall of the outer ring to improve the sealing effect.

[0055] Understandably, in other embodiments, two annular waterproof ribs may also be provided, one of which extends between the inner ring and the outer ring and is attached to the outer side wall of the inner ring, and the other is provided on the outer side of the outer ring and is attached to the outer side wall of the outer ring, so as to achieve a double waterproof and dustproof effect.

[0056] Understandably, in other embodiments, the adjustment knob is provided with a fixing groove, and the mounting base is provided with a rotating shaft. The rotating shaft passes through the fixing groove to make the first gear ring and the transmission screw mesh with each other. The assembly process becomes simpler and more direct, and the alignment and connection between the adjustment knob and the transmission mechanism can be completed without complicated alignment or adjustment steps, thus improving assembly efficiency.

[0057] In addition to the preferred embodiments described above, the present invention has other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection claimed by the present invention.

Claims

1. A dustproof and waterproof lawnmower, comprising a body (100), a cutting mechanism disposed on the body (100), and an adjustment mechanism for adjusting the height of the cutting mechanism on the body (100), wherein the adjustment mechanism comprises an adjustment knob (110) and a transmission screw (120), the first end of the transmission screw (120) being toothed into the adjustment knob (110), and the second end of the transmission screw (120) being drivenly connected to the cutting mechanism, characterized in that, The body (100) is provided with a mounting base (130) for mounting an adjustment knob (110). The adjustment knob (110) includes an outer ring (112) and an inner ring (111). The inner sidewall of the inner ring (111) is provided with a first gear ring (113). The mounting base (130) is provided with a through hole (131) for a transmission screw (120) to pass through and an annular waterproof rib (132) arranged around the through hole (131). The transmission screw (120) meshes with the first gear ring (113). The annular waterproof rib (132) protrudes upward relative to the surface of the mounting base (130) to extend between the inner ring (111) and the outer ring (112). The outer ring (112) includes a water-repellent feature. The water-blocking section (1121) and the guide section (1122) extending from the water-blocking section (1121) are arranged vertically. The guide section (1122) bends downward from the lower end of the water-blocking section (1121) away from the inner ring (111). The guide section (1122) is provided with an outer step (1123). The mounting base (130) is provided with an inner step (133) that engages with the outer step (1123). The adjusting knob (110) is also provided with a positioning spring (170) with a central protrusion. The inner sidewall of the outer ring (112) is provided with a second toothed ring (116). The central protrusion of the positioning spring (170) is inserted into the tooth groove of the second toothed ring (116).

2. The dustproof and waterproof lawnmower according to claim 1, characterized in that, The annular waterproof reinforcement bar (132) fits against the outer wall of the inner ring (111).

3. The dustproof and waterproof lawnmower according to claim 1, characterized in that, The body (100) is provided with an elastic sealing ring (140) surrounding the through hole (131), and the inner side of the elastic sealing ring (140) is provided with a flexible lip (141). The transmission screw (120) passes through the elastic sealing ring (140) and fits with the flexible lip (141).

4. The dustproof and waterproof lawnmower according to claim 3, characterized in that, The body (100) is provided with a waterproof groove (101) surrounding the through hole (131), and the elastic sealing ring (140) is inserted into the waterproof groove (101).

5. The dustproof and waterproof lawnmower according to claim 1, characterized in that, The adjustment knob (110) also includes an operation part (114) for user operation. The body (100) is provided with a waterproof cover. The waterproof cover includes a shielding part (150) and an opening part (151). The operation part (114) extends through the opening part (151) and is located outside the body (100). The shielding part (150) covers the inner ring (111) and the outer ring (112).

6. The dustproof and waterproof lawnmower according to claim 5, characterized in that, The top of the shielding part (150) and the outer ring (112) form a water collection cavity (153) that communicates with the opening (151). The bottom of the shielding part (150) and the bottom of the outer ring (112) form a drain outlet (152), which communicates with the water collection cavity (153).

7. The dustproof and waterproof lawnmower according to claim 1, characterized in that, The outer wall of the annular waterproof rib (132) is provided with a spring clip groove (135), and the two ends of the positioning spring clip (170) are inserted into the spring clip groove (135).

8. The dustproof and waterproof lawnmower according to claim 1, characterized in that, The cutting mechanism includes a mounting frame (160), a protective cover (161), a motor (162), and a cutting disc (163). The protective cover (161) is located above the cutting disc (163) and is fixedly connected to the mounting frame (160). The cutting disc (163) is located on the output shaft of the motor (162). The motor (162) is fixedly connected to the mounting frame (160). The machine body (100) is provided with at least one lifting slide rail (164). The mounting frame (160) is slidably connected to the lifting slide rail (164). The mounting frame (160) is provided with a first rotating gear pattern (1601). The second end of the transmission screw (120) is provided with a second rotating gear pattern (121) that meshes with the first rotating gear pattern (1601).

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