Dustproof and waterproof mower

Abstract

The utility model discloses a dustproof and waterproof lawn mower, which belongs to the technical field of gardening tools, solves the problem of poor waterproof and dustproof effects of lawn mowers in the prior art, and adopts the technical scheme that an adjusting mechanism comprises an adjusting knob and a transmission screw rod, a first end of the transmission screw rod is in toothed connection with the adjusting knob, and a second end of the transmission screw rod is in toothed connection with the adjusting knob. The second end of the transmission screw is in transmission connection with the cutting mechanism, the machine body is provided with a mounting seat for mounting an adjusting knob, the adjusting knob comprises an outer ring and an inner ring, the inner side wall of the inner ring is provided with a first gear ring, and the mounting seat is provided with a through hole for the transmission screw to penetrate out and an annular waterproof rib arranged around the through hole. The transmission screw is in tooth connection with the first gear ring, and the surface, opposite to the mounting base, of the annular waterproof rib protrudes upwards so as to extend between the inner ring and the outer ring. The mowing machine is mainly used for effectively preventing water vapor and dust from entering the mowing machine.

Description

Technical Field

[0001] The utility model relates to the technical field of garden tools, in particular to a dustproof and waterproof lawn mower. Background Art

[0002] In order to meet the needs of differentiated lawn mowing heights, existing lawn mowers such as CN216532644U and CN209489159U all disclose a cutter disc height adjustment mechanism for adjusting the height of the cutter disc. The cutter disc height adjustment mechanism includes an adjusting knob, a transmission screw and other structures. The adjusting knob is generally arranged on the top of the lawn mower. A through hole is arranged on the top of the lawn mower for the transmission screw to pass through and connect with the adjusting knob. The other end of the transmission screw is connected to the cutting mechanism in a transmission manner. By rotating the adjusting knob on the cutter disc height adjustment assembly, the cutter disc is driven to rise and fall, thereby selecting a suitable height. However, no waterproof and dustproof structure is provided. Water vapor and dust can easily enter the interior of the lawn mower from the through hole, thereby affecting the service life of the lawn mower. Utility Model Content

[0003] The utility model aims to provide a dustproof and waterproof lawn mower, which solves the problem of poor waterproof and dustproof effect of lawn mowers in the prior art, can effectively prevent water vapor and dust from entering the interior of the lawn mower, and ensure the service life of the lawn mower.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a dustproof and waterproof lawn mower, comprising a body, a cutting mechanism arranged on the body and an adjustment mechanism for adjusting the height of the cutting mechanism on the body, the adjustment mechanism comprising an adjusting knob and a transmission screw, the first end of the transmission screw is gear-engaged with the adjusting knob, the second end of the transmission screw is transmission-connected with the cutting mechanism, a mounting seat for installing the adjusting knob is provided on the body, the adjusting knob comprises an outer ring and an inner ring, a first gear ring is provided on the inner side wall of the inner ring, a through hole for the transmission screw to pass through and an annular waterproof rib arranged around the through hole is provided on the mounting seat, the transmission screw is gear-engaged with the first gear ring, and the annular waterproof rib is protruded upward relative to the surface of the mounting seat to extend between the inner ring and the outer ring.

[0005] After adopting the above technical scheme, the utility model has the following advantages: first, through the gear connection design of the adjustment knob and the transmission screw, the user can easily and accurately adjust the height of the cutting mechanism without the assistance of tools, thereby improving work efficiency; second, the adjustment knob includes an outer ring and an inner ring, and the inner ring and the outer ring form a double function of blocking dust and water vapor, effectively reducing dust and water vapor from entering the interior of the lawn mower from the through hole; then, a first gear ring is provided on the inner side wall of the inner ring, and an annular waterproof rib is provided around the through hole on the mounting seat, and the annular waterproof rib is protruded upward relative to the surface of the mounting seat to extend between the inner ring and the outer ring, the inner ring is located on the inner side of the annular waterproof rib, and the outer ring is located on the outer side of the annular waterproof rib, so that the annular waterproof rib is significantly higher than the surface of the mounting seat, and dust and water vapor in the external environment can be blocked outside the annular waterproof rib, effectively reducing dust and water vapor from entering the first gear ring, ensuring the stability of the gear connection between the first gear ring and the transmission screw, and also reducing dust and water vapor from entering the interior of the lawn mower, protecting the reliability of the electronic equipment and mechanical parts inside the lawn mower, and ensuring the overall service life of the lawn mower.

[0006] Furthermore, the annular waterproof rib fits the outer wall of the inner ring.

[0007] By adopting the above-mentioned technical solution, the design of the annular waterproof rib close to the outer wall of the inner ring ensures that during the rotation of the adjustment knob, the gap between the annular waterproof rib and the outer wall of the inner ring is effectively closed, forming a continuous sealing interface, blocking moisture, dust and other external pollutants from entering the interior of the lawn mower, improving the waterproof and dustproof level of the lawn mower, and ensuring the service life of the lawn mower.

[0008] Furthermore, the body is provided with an elastic sealing ring arranged around the through hole, the inner side of the elastic sealing ring is provided with a flexible lip, and the driving screw passes through the elastic sealing ring and fits with the flexible lip.

[0009] By adopting the above-mentioned technical solution, an elastic sealing ring is arranged around the through hole, which can effectively prevent dust, moisture or other external pollutants from entering the interior of the lawn mower and protect the internal structure from environmental influences. Secondly, the flexible lip fits against 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 body is provided with a waterproof groove surrounding the through hole, and the elastic sealing ring is inserted into the waterproof groove.

[0011] By adopting the above-mentioned technical solution, by inserting the elastic sealing ring into the waterproof groove, the elastic sealing ring can be accurately positioned and will not shift or fall off when the equipment is running or subjected to external force, thereby providing a more stable and reliable sealing effect and making the installation of the elastic sealing ring easier and faster.

[0012] Furthermore, the outer ring includes a water retaining section and a diversion section extending from the water retaining section, the water retaining section is vertically arranged, and the diversion section is inclined and bent downward from the lower end of the water retaining section to a side away from the inner ring.

[0013] By adopting the above-mentioned technical solution, the vertical setting of the water retaining section can directly block most of the directly impacting water flow, effectively preventing water from directly splashing into or penetrating into the adjusting knob. The guide section is tilted and bent downward from the lower end of the water retaining section to the side away from the inner circle, which can guide the water flow to flow in a specific direction instead of directly impacting the inner circle or the fuselage. This not only reduces the direct impact of water on the internal structure, but also promotes the rapid discharge of water, reduces the residence time and residual amount of water droplets on the surface, and helps to keep the lawn mower dry.

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

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

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

[0017] By adopting the above technical solution, the operating part passes through the opening of the waterproof cover and is arranged on the outside of the fuselage, ensuring that the user can directly operate the knob without destroying the waterproof structure, without affecting the intuitiveness and convenience of the control. The shielding part of the waterproof cover covers the inner and outer circles of the knob, effectively blocking moisture, dust and other contaminants from entering the interior of the device.

[0018] Furthermore, the shielding portion and the top end of the outer ring form a water collecting chamber connected to the opening portion, and a drainage port is formed between the lower end of the shielding portion and the lower end of the outer ring, and the drainage port is connected to the water collecting chamber.

[0019] By adopting the above technical solution, the water collection chamber can effectively collect the accumulated water on the surface of the equipment, which can prevent rainwater from accumulating in the operating part. The water is collected in the water collection chamber and discharged through the drain outlet, thereby protecting the interior of the lawn mower from moisture invasion and reducing the risks of short circuit, rust, etc.

[0020] Furthermore, the adjustment knob is also provided with a positioning spring piece with a middle protrusion, the outer wall of the annular waterproof rib is provided with a spring piece slot, the inner wall of the outer ring is provided with a second gear ring, the two ends of the positioning spring piece are inserted into the spring piece slot, and the middle protrusion section of the positioning spring piece is inserted into the tooth groove of the second gear ring.

[0021] By adopting the above technical solution, the middle raised section of the positioning spring is inserted into 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. Every step of the adjustment knob during rotation has a clear sense of positioning. The user can intuitively feel the change in the adjustment position during adjustment. The user can adjust to the desired position more accurately, thereby improving the accuracy of the operation.

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

[0023] By adopting the above technical solution, the sliding matching connection design of at least one lifting slide rail on the machine body and the mounting frame makes the adjustment of the cutting height more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] Figure 1 It is a schematic structural diagram of the dustproof and waterproof lawn mower in the utility model;

[0026] Figure 2 For the utility model Figure 1 A schematic diagram of the structure enlargement at the center A;

[0027] Figure 3 It is a structural schematic diagram of the mounting seat in the utility model;

[0028] Figure 4 It is a partial structural cross-sectional view of the dustproof and waterproof lawn mower of the utility model;

[0029] Figure 5 It is a cross-sectional view of a part of the structure of the dustproof and waterproof lawn mower of the utility model from another perspective;

[0030] Figure 6 It is a structural schematic diagram of the adjusting knob in the utility model;

[0031] Figure 7 It is a cross-sectional view of the adjusting knob in the utility model;

[0032] In the figure, 100, fuselage; 101, waterproof groove; 110, adjustment knob; 111, inner ring; 112, outer ring; 1121, water retaining section; 1122, diversion section; 1123, outer step; 113, first gear ring; 114, operating part; 115, rotating shaft; 116, second gear ring; 120, transmission screw; 121, second rotating gear pattern; 130, mounting seat; 131, through hole; 132, annular waterproof rib; 133. Inner step; 134. Fixing groove; 135. Spring clip slot; 140. Elastic sealing ring; 141. Flexible lip; 150. Shielding portion; 151. Opening portion; 152. Drainage outlet; 153. Water collecting chamber; 160. Mounting frame; 1601. First rotating gear pattern; 161. Protective cover; 162. Motor; 163. Cutting disc; 164. Lifting rail; 165. Buffer spring; 170. Positioning spring. DETAILED DESCRIPTION

[0033] The utility model provides a dustproof and waterproof lawn mower, comprising a body, a cutting mechanism arranged on the body and an adjusting mechanism for adjusting the height of the cutting mechanism on the body, the adjusting mechanism comprising an adjusting knob and a driving screw, the first end of the driving screw is gear-engaged with the adjusting knob, the second end of the driving screw is drivingly connected with the cutting mechanism, a mounting seat for mounting the adjusting knob is arranged on the body, the adjusting knob comprises an outer ring and an inner ring, the inner side wall of the inner ring is provided with a first gear ring, a through hole for the driving screw to pass through and an annular waterproof rib arranged around the through hole are provided on the mounting seat, the driving screw is gear-engaged with the first gear ring, and the annular waterproof rib is protruded upward relative to the surface of the mounting seat to extend into between the inner ring and the outer ring.

[0034] First, through the tooth connection design of the adjustment knob and the transmission screw, the user can easily and accurately adjust the height of the cutting mechanism without the assistance of tools, thereby improving work efficiency. Secondly, the adjustment knob includes an outer ring and an inner ring, and the inner ring and the outer ring form a double barrier to dust and water vapor, effectively reducing dust and water vapor from entering the interior of the lawn mower through the through hole. Then, a first tooth ring is provided on the inner side wall of the inner ring, and an annular waterproof rib is provided around the through hole on the mounting seat. The annular waterproof rib is protruded upward relative to the surface of the mounting seat to extend between the inner ring and the outer ring. The inner ring is located on the inner side of the annular waterproof rib, and the outer ring is located on the outer side of the annular waterproof rib, so that the annular waterproof rib on the mounting seat is significantly higher than the surface of the mounting seat, which can block dust and water vapor in the external environment outside the annular waterproof rib, effectively reducing dust and water vapor from entering the first tooth ring, ensuring the stability of the tooth connection between the first tooth ring and the transmission screw, and also reducing dust and water vapor from entering the interior of the lawn mower, protecting the reliability of the electronic equipment and mechanical parts inside the lawn mower, and ensuring the overall service life of the lawn mower.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

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

[0037] It should be understood that in various embodiments of the present invention, the size of the serial number of each process does not mean 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 the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0039] It should be understood that in the present utility model, "plurality" refers to two or more than two. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0040] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0041] like Figures 1 to 7As shown, the utility model provides a dustproof and waterproof lawn mower, including a body 100, a cutting mechanism arranged on the body 100 and an adjusting mechanism for adjusting the height of the cutting mechanism on the body 100, the adjusting mechanism including an adjusting knob 110 and a driving screw 120, a first end of the driving screw 120 is gear-engaged with the adjusting knob 110, a second end of the driving screw 120 is drivingly connected with 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 arranged above the cutting disc 163 and is fixedly connected with the mounting frame 160, the cutting disc 163 is arranged on the output shaft of the motor 162, the motor 162 is fixedly connected with the mounting frame 160, a lifting slide rail 164 is arranged on the body 100, the mounting frame 160 is slidably matched with the lifting slide rail 164, a first rotating gear pattern 1601 is arranged on the mounting frame 160, a second rotating gear pattern 1601 is arranged on the driving screw 120 The end is provided with a second rotating gear pattern 121 which meshes with the first rotating gear pattern 1601. The body 100 is provided with a mounting seat 130 for mounting the adjusting knob 110. The adjusting 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 seat 130 is provided with a through hole 131 for the transmission screw 120 to pass through. The transmission screw 120 is gear-engaged with the first gear ring 113. The transmission screw 120 is driven to rotate by rotating the adjusting knob 110. The rotational movement of the transmission screw 120 drives the mounting frame 160 to rise and fall along the lifting slide rail 164 to drive the cutter disc to rise and fall. The user can easily and accurately adjust and select a suitable cutting height without the assistance of tools, thereby improving work efficiency. The design of the inner ring 111 and the outer ring 112 can also form a double dust and water vapor blocking effect, effectively reducing the entry of impurities such as dust and water vapor into the interior of the lawn mower from the through hole 131.

[0042] In order to reduce the entry of impurities such as dust and water vapor into the interior of the lawn mower, the mounting seat 130 is provided with an annular waterproof rib 132 arranged around the through hole 131. The annular waterproof rib 132 protrudes upward relative to the surface of the mounting seat 130 to extend into between the inner ring 111 and the outer ring 112, so that the annular waterproof rib 132 is significantly higher than the surface of the mounting seat 130, which can block dust and water vapor in the external environment outside the annular waterproof rib 132, effectively reduce dust and water vapor from entering the first gear ring 113, ensure the stability of the tooth connection between the first gear ring 113 and the transmission screw 120, and also reduce dust and water vapor from entering the interior of the lawn mower, protect the reliability of the electronic equipment and mechanical parts inside the lawn mower, and ensure the overall service life of the lawn mower.

[0043] Among them, the annular waterproof rib 132 fits the outer wall of the inner ring 111. The design of the annular waterproof rib 132 close to the outer wall of the inner ring 111 ensures that during the rotation of the adjustment knob 110, the gap between the annular waterproof rib 132 and the outer wall of the inner ring 111 is effectively closed to form a continuous sealing interface, which prevents moisture, dust and other external pollutants from entering the interior of the lawn mower, improves the waterproof and dustproof level of the lawn mower, and ensures the service life of the lawn mower.

[0044] Specifically, the adjustment knob 110 includes an operating portion 114 for user operation, and a waterproof cover is provided on the body 100, the waterproof cover includes a shielding portion 150 and an opening portion 151, and the operating portion 114 passes through the opening portion 151 to be arranged outside the body 100, ensuring that the user can directly operate the knob without destroying the waterproof structure, without affecting the intuitiveness and convenience of the control. The shielding portion 150 is provided above the inner ring 111 and the outer ring 112, effectively preventing moisture, dust and other pollutants from entering the interior of the device.

[0045] Since water can enter from the opening 151, in order to reduce the occurrence of water accumulation, the shielding portion 150 and the top of the outer ring 112 form a water collecting chamber 153 that is connected to the opening 151. The water collecting chamber 153 can effectively collect water on the surface of the equipment and can prevent rainwater from accumulating on the operating portion 114. A drain port 152 is formed between the lower end of the shielding portion 150 and the lower end of the outer ring 112. The drain port 152 is connected to the water collecting chamber 153, and the water is collected through the water collecting chamber 153 and discharged through the drain port 152, thereby protecting the interior of the lawn mower from moisture invasion and reducing the risks of short circuit, rust, etc.

[0046] Secondly, the outer ring 112 includes a water retaining section 1121 and a diversion section 1122 extending from the water retaining section 1121. The water retaining section 1121 is vertically arranged, which can directly block most of the directly impacting water flow, and effectively prevent water from directly splashing into or penetrating into the adjusting knob 110. The diversion section 1122 is tilted and bent downward from the lower end of the water retaining section 1121 to the side away from the inner ring 111, and can guide the water flow to flow in a specific direction instead of directly impacting the inner ring 111 or the body 100. This not only reduces the direct impact of water on the internal structure, but also promotes the rapid discharge of water, reduces the residence time and residual amount of water droplets on the surface, and helps to keep the lawn mower dry.

[0047] Furthermore, the guide section 1122 is provided with an outer step 1123, and the mounting seat 130 is provided with an inner step 133 which is engaged with the outer step 1123. The tight engagement of the outer step 1123 and the inner step 133 forms a sealed barrier, which helps to prevent external pollutants such as moisture and dust from invading the interior through the gap, further enhancing the waterproof and dustproof capabilities of the lawn mower. The step-engaging method also simplifies the assembly steps.

[0048] Furthermore, the body 100 is provided with an elastic sealing ring 140 arranged around the through hole 131, and a flexible lip 141 is provided on the inner side of the elastic sealing ring 140. The transmission screw 120 passes through the elastic sealing ring 140 and fits with the flexible lip 141. The elastic sealing ring 140 is arranged around the through hole 131, which can effectively prevent dust, moisture or other external pollutants from entering the interior of the lawn mower and protect the internal structure from environmental influences. Secondly, the flexible lip 141 fits with 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 the operating noise.

[0049] In order to further prevent dust, moisture or other external contaminants from entering the through hole 131, the body 100 is provided with a waterproof groove 101 arranged around the through hole 131, which can effectively prevent moisture from penetrating into the lawn mower along the edge of the through hole 131, especially in rainy days or when cleaning the equipment, which can significantly improve the waterproof ability of the equipment and protect the internal electronic components and mechanical structures from moisture. Among them, 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 can be ensured that the elastic sealing ring 140 is accurately positioned and will not be offset or fall off when the equipment is running or subjected to external forces, thereby providing a more stable and reliable sealing effect, and also making it easier and faster to install the elastic sealing ring 140.

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

[0051] In order 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 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 stroke of the cutting disc 163 to prevent the cutting disc 163 from being too high or too low, thereby ensuring the cutting effect.

[0052] Furthermore, the adjusting knob 110 is also provided with a middle raised positioning spring piece 170, the outer wall of the annular waterproof rib 132 is provided with a spring piece slot 135, the inner wall of the outer ring 112 is provided with a second gear ring 116, the two ends of the positioning spring piece 170 are inserted into the spring piece slot 135, and the middle raised section of the positioning spring piece 170 is inserted into the tooth groove of the second gear ring 116. This mechanical interlocking structure provides additional stability and durability. Even when subjected to vibration or external force, the adjusting knob 110 is not easily displaced, ensuring the stability of the setting. The adjusting knob 110 has a clear sense of positioning at every step of rotation, and the user can intuitively feel the change in the adjustment position when adjusting. The user can adjust to the desired position more accurately, thereby improving the accuracy of the operation.

[0053] It is understandable that in other embodiments, the fuselage may also be provided with two, three, four, five or other suitable lifting rails. The configuration of multiple lifting rails can evenly distribute the weight of the mounting frame and the dynamic load during operation. Compared with a single rail, the stability and load-bearing capacity of the entire system are significantly improved, especially when performing heavy-load cutting or working on uneven ground, it can maintain good balance and controllability. The multi-rail system can more accurately control the up and down movement of the mounting frame, reduce deflection and shaking, and ensure accurate adjustment of the cutting depth. At the same time, the increased number of lifting rails also provides more support points for the mounting frame, making it smoother and more flexible to adjust the height.

[0054] It is understandable that in other embodiments, the annular waterproof rib may also fit the inner wall of the outer ring to improve the sealing effect.

[0055] It can be understood that in other embodiments, two annular waterproof ribs can also be provided, one of which extends between the inner ring and the outer ring and fits against the outer wall of the inner ring, and the other is provided on the outside of the outer ring and fits against the outer wall of the outer ring, thereby achieving a double waterproof and dustproof effect.

[0056] It can be understood that in other embodiments, the adjusting knob is provided with a fixing groove, and a rotating shaft is provided on the mounting seat. The rotating shaft is inserted into the fixing groove so that the first gear ring and the transmission screw can engage with each other. The assembly process becomes simpler and more direct, and the alignment and connection of the adjusting knob and the transmission mechanism can be completed without complicated alignment or adjustment steps, thereby improving the assembly efficiency.

[0057] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A dustproof and waterproof lawn mower, comprising a body (100), a cutting mechanism arranged on the body (100), and an adjusting mechanism for adjusting the height of the cutting mechanism on the body (100), the adjusting mechanism comprising an adjusting knob (110) and a driving screw (120), the first end of the driving screw (120) being gear-engaged with the adjusting knob (110), and the second end of the driving screw (120) being drivingly connected with the cutting mechanism, characterized in that: The body (100) is provided with a mounting seat (130) for mounting an adjusting knob (110); the adjusting knob (110) comprises 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 seat (130) is provided with a through hole (131) for a driving screw (120) to pass through and an annular waterproof rib (132) arranged around the through hole (131); the driving screw (120) is gear-engaged with the first gear ring (113); the annular waterproof rib (132) is arranged to protrude upward relative to the surface of the mounting seat (130) so as to extend between the inner ring (111) and the outer ring (112).

2. The dustproof and waterproof lawn mower according to claim 1, characterized in that: The annular waterproof rib (132) fits the outer wall of the inner ring (111).

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

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

5. The dustproof and waterproof lawn mower according to claim 1, characterized in that: The outer ring (112) comprises a water retaining section (1121) and a flow guide section (1122) extending from the water retaining section (1121); the water retaining section (1121) is vertically arranged; and the flow guide section (1122) is inclined and bent downward from the lower end of the water retaining section (1121) to a side away from the inner ring (111).

6. The dustproof and waterproof lawn mower according to claim 5, characterized in that: The guide section (1122) is provided with an outer step (1123), and the mounting seat (130) is provided with an inner step (133) that is buckled with the outer step (1123).

7. The dustproof and waterproof lawn mower according to claim 1, characterized in that: The adjusting knob (110) further comprises an operating portion (114) for a user to operate. A waterproof cover is provided on the body (100), and the waterproof cover comprises a shielding portion (150) and an opening portion (151). The operating portion (114) passes through the opening portion (151) to be arranged outside the body (100), and the shielding portion (150) is arranged to cover the inner ring (111) and the outer ring (112).

8. The dustproof and waterproof lawn mower according to claim 7, characterized in that: The shielding portion (150) and the top end of the outer ring (112) form a water collecting chamber (153) that is connected to the opening portion (151), and a drainage port (152) is formed between the lower end of the shielding portion (150) and the lower end of the outer ring (112), and the drainage port (152) is connected to the water collecting chamber (153).

9. The dustproof and waterproof lawn mower according to claim 1, characterized in that: The adjusting knob (110) is also provided with a centrally protruding positioning spring piece (170); the outer side wall of the annular waterproof rib (132) is provided with a spring piece retaining groove (135); the inner side wall of the outer ring (112) is provided with a second gear ring (116); the two ends of the positioning spring piece (170) are inserted into the spring piece retaining groove (135); and the centrally protruding section of the positioning spring piece (170) is inserted into the tooth groove of the second gear ring (116).

10. The dustproof and waterproof lawn mower according to claim 1, characterized in that: The cutting mechanism comprises a mounting frame (160), a protective cover (161), a motor (162), and a cutting blade disc (163); the protective cover (161) is arranged above the cutting blade disc (163) and is fixedly connected to the mounting frame (160); the cutting blade disc (163) is arranged on the output shaft of the motor (162); the motor (162) is fixedly connected to the mounting frame (160); at least one lifting rail (164) is arranged on the body (100); the mounting frame (160) is connected to the lifting rail (164) in a sliding manner; the mounting frame (160) is provided with a first rotating gear pattern (1601); and the second end of the transmission screw (120) is provided with a second rotating gear pattern (121) meshing with the first rotating gear pattern (1601).

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