Low noise intelligent mower

Abstract

The present application relates to the technical field of lawn mower, particularly relates to a low-noise intelligent lawn mower, which comprises a main shaft, sliding rods and a winding assembly, the main shaft is rotationally arranged, the sliding rods are provided with a plurality of sliding rods, the plurality of sliding rods are arranged along the circumferential direction of the main shaft and are slidingly arranged on the main shaft along the radial direction of the main shaft, the adjacent two sliding rods are provided with a grass rope capable of sliding, the two ends of the grass rope are respectively passed from the side of the corresponding two sliding rods away from the main shaft to the direction close to the main shaft, the length of the grass rope between the adjacent two sliding rods is greater than the distance between the two ends of the two sliding rods away from the main shaft, and the winding assembly is arranged on the main shaft and is used for synchronously winding and unwinding the grass rope when the grass rope slides relative to the sliding rod. When the main shaft rotates, the grass rope is bent to form an included angle, one side of the included angle located on the front side in the rotating direction of the shaft is a working side, and the other side is a standby side, and the working side is easy to wear when contacting the grass. The winding assembly is arranged to wind the working side after wear, so that the grass rope is prevented from being broken.

Description

Technical Field

[0001] This invention relates to the field of lawnmower technology, and in particular to a low-noise intelligent lawnmower. Background Technology

[0002] A lawnmower is a mechanical tool used for trimming lawns, vegetation, etc. It consists of a mounting base, engine, cutting components, and operating mechanism. The engine drives the cutting components to rotate and perform weeding operations. The cutting components, as the core actuator of the lawnmower, come in various forms, mainly divided into rigid blades and flexible trimming ropes. Flexible trimming ropes are favored in scenarios with high noise control requirements (such as green spaces around residential areas) because they generate significantly less noise when in contact with vegetation than rigid blades, and are also cheaper to manufacture and easier to replace. Therefore, they have become the mainstream cutting component choice for low-noise lawnmowers.

[0003] Because the cutting surface of flexible mowing ropes is usually fixed, during prolonged continuous cutting or when working with vegetation with thick roots, the single side in continuous contact with the vegetation will experience severe wear. This significantly reduces the structural strength of the flexible mowing rope, making it highly susceptible to breakage during high-speed rotation. A broken mowing rope not only causes the lawnmower to stop, affecting the work progress, but may also be thrown at high speed under centrifugal force, causing impact damage to the mower itself and posing a serious threat to the personal safety of nearby operators or passersby. Summary of the Invention

[0004] Therefore, it is necessary to provide a low-noise intelligent lawnmower to address the problem of current grass-cutting ropes easily breaking during operation.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A low-noise intelligent lawnmower includes a mowing mechanism and a mobile chassis. The mowing mechanism includes a main shaft, sliding rods, a winding assembly, and an adjusting assembly. The main shaft is vertically mounted on the chassis and rotatably connected to it. Multiple sliding rods are arranged circumferentially along the main shaft and slidably mounted on it radially. A mowing rope is wound between adjacent sliding rods, with both ends passing through the corresponding sliding rods from the side furthest from the main shaft towards the side closest to it. The length of the mowing rope between adjacent sliding rods is greater than the distance between the ends of the two sliding rods furthest from the main shaft, and the rope is slidably connected to the rods. The rope can slide from the rear sliding rod towards the front sliding rod in the direction of main shaft rotation. The winding assembly is mounted on the main shaft and synchronously winds up and down the mowing rope as it slides towards the front sliding rod. The adjusting assembly controls the sliding of the sliding rods radially along the main shaft.

[0007] Preferably, a protective shell is rotatably provided under the vehicle body, the protective shell is rotatably connected to the vehicle body, the rotation axis of the protective shell is parallel to the axis of the main shaft, the main shaft is set inside the protective shell, and the main shaft is rotatably connected to the vehicle body through the protective shell, the circumference of the main shaft is provided with guide tubes consistent with the number of slide rods, each guide tube corresponds to one slide rod, each slide rod passes through the protective shell and is slidably set in the corresponding guide tube, and the slide rod is slidably connected to the protective shell.

[0008] Preferably, there are multiple winding assemblies, each winding assembly corresponding to one grass trimming rope. Each winding assembly includes a winding wheel and a releasing wheel, both of which are rotatably mounted on a guide tube and are connected by a drive. The grass trimming rope passes through one end of a slide bar located on the front side and is wound around the winding wheel. The grass trimming rope passes through one end of a slide bar located on the rear side and is wound around the releasing wheel. The winding wheel rotates to wind up the grass trimming rope, and the releasing wheel rotates to release the grass trimming rope.

[0009] Preferably, the adjusting assembly includes a sliding sleeve, connecting rods, and a power unit. One end of the sliding sleeve passes through the protective shell and is sleeved on the main shaft. The sliding sleeve is rotatably connected to the protective shell. The sliding sleeve is keyed to the main shaft and slidably connected to the main shaft along the axial direction. Multiple connecting rods are provided and arranged around the circumferential direction of the main shaft. The two ends of each connecting rod are respectively hinged to the sliding sleeve and a sliding rod. The power unit is used to control the sliding of the sliding sleeve on the main shaft.

[0010] Preferably, the power unit includes a push rod and a first motor. The push rod is slidably mounted on the vehicle body along its own axis. The push rod is coaxial with the sliding sleeve and is located at the end of the sliding sleeve away from the main shaft. The first motor is mounted on the vehicle body and its output shaft is threadedly connected to the push rod.

[0011] Preferably, the mowing mechanism further includes multiple friction components, each corresponding to a mowing rope. Each friction component includes a connecting wheel, a friction block, and a second spring. The connecting wheel is rotatably mounted on the main shaft and is frictionally connected to the take-up and release wheels between two adjacent slide rods. The take-up and release wheels are driven by the connecting wheel. The friction block is slidably mounted on the main shaft and located below the connecting wheel. The second spring connects the friction block and the protective shell, providing a force for the friction block to move closer to the connecting wheel, so that the friction block abuts against the connecting wheel, providing resistance to the rotation of the connecting wheel.

[0012] Preferably, the main shaft is provided with a plurality of telescopic rods arranged along the axis of the main shaft, each telescopic rod extending and retracting along the axial direction of the main shaft and abutting against a friction block.

[0013] Preferably, the protective shell is provided with a rotating wheel, which is sleeved on the sliding sleeve and slidably connected to the sliding sleeve in the axial direction of the sliding sleeve. The rotating wheel is keyed to the sliding sleeve to rotate synchronously with the sliding sleeve. A second motor is provided on the vehicle body to drive the rotating wheel to rotate.

[0014] Preferably, each slide bar is provided with two guide wheels that rotate around its own axis. The two guide wheels are located on both sides of the slide bar in the axial direction of the main shaft, and the axis of the guide wheels is parallel to the axis of the main shaft. The guide wheels are located outside the protective shell, and the straw rope between two adjacent slide bars is wound around the corresponding two guide wheels.

[0015] Preferably, the vehicle body is equipped with a probe to detect the size of the roots and stems of unharvested grass in front of the vehicle as it travels.

[0016] The beneficial effects of this invention are as follows: Through the coordinated arrangement of the trimming rope and the sliding rod, after the main shaft rotates, the loose trimming rope will tighten under the centrifugal force. The trimming rope between two adjacent sliding rods will bend on the horizontal plane, forming an angle. Even if the trimming rope breaks, it will not fly out, ensuring the safety of nearby personnel and equipment. Simultaneously, as the trimming rope bends and forms an angle, in the direction of main shaft rotation, one side located before the angle is designated as the working side, which is prone to wear when in contact with the grass, while the other side is the waiting side, which does not contact the grass. When the working side wears down and its mass decreases, the centrifugal forces on the working side and the waiting side become unequal. By incorporating a winding assembly, the waiting side will move closer to the working side and pass through the bend to form a new working side, while the original working side will be wound up, preventing the trimming rope from breaking.

[0017] An adjustment mechanism is installed, which controls the angle between adjacent sliders of the cutting rope, thereby changing the cutting direction when the working edge contacts the grass. This makes it easier to cut grass with different root sizes. When encountering grass with larger root sizes, the angle between the working edge and the grass is reduced, causing the working edge to tilt and cut towards the grass, making it easier to cut the grass and reducing wear on the cutting rope. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a low-noise intelligent lawnmower provided in an embodiment of the present invention;

[0019] Figure 2 A front view of a low-noise intelligent lawnmower provided in an embodiment of the present invention;

[0020] Figure 3 for Figure 2 Sectional view along the middle AA direction;

[0021] Figure 4 for Figure 3 Enlarged view of point C in the middle;

[0022] Figure 5 for Figure 2 Sectional view along the BB direction;

[0023] Figure 6 for Figure 5 Enlarged view of point D in the middle;

[0024] Figure 7 A partial structural schematic diagram of the mowing mechanism of a low-noise intelligent lawnmower provided in an embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the internal structure of the protective shell of a low-noise intelligent lawnmower provided in an embodiment of the present invention;

[0026] Figure 9 A top view of the mowing mechanism of a low-noise intelligent lawnmower provided in an embodiment of the present invention;

[0027] Figure 10 for Figure 9 A sectional view along the EE direction;

[0028] Figure 11 for Figure 10 Enlarged view of point F in the middle.

[0029] in:

[0030] 100. Vehicle body; 101. Main shaft; 102. Sliding rod; 103. Straw rope; 104. Protective shell; 105. Guide tube; 106. Retracting wheel; 107. Unloading wheel; 108. Sliding sleeve; 109. Connecting rod; 110. Through groove; 111. Top rod; 112. First motor; 113. First spring; 114. Connecting wheel; 115. Friction block; 116. Second spring; 117. Telescopic rod; 118. Third spring; 119. Rotating wheel; 120. Second motor; 121. Transmission belt; 122. Guide wheel; 123. Probe head. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0032] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] like Figures 1 to 11 As shown, this embodiment of the invention provides a low-noise intelligent lawnmower, including a mowing mechanism and a mobile vehicle body 100. The mowing mechanism includes a main shaft 101, slide rods 102, a winding assembly, and an adjustment assembly. The main shaft 101 is vertically mounted on the vehicle body 100 and is rotatably connected to the vehicle body 100. Multiple slide rods 102 are provided, arranged circumferentially along the main shaft 101 and slidably mounted on the main shaft 101 in the radial direction. The slide rods 102 extend in the radial direction of the main shaft 101. A mowing rope 103 is wound between two adjacent slide rods 102, with each end of the mowing rope 103 originating from one of the corresponding two slide rods. The slide bar 102 passes through the side away from the main shaft 101 towards the main shaft 101; the length of the straw rope 103 between two adjacent slide bars 102 is greater than the distance between the ends of the two slide bars 102 away from the main shaft 101, and the straw rope 103 is slidably connected to the slide bar 102, so that the straw rope can slide from the slide bar 102 located on the rear side to the slide bar 102 located on the front side in the direction of rotation of the main shaft 101; the winding assembly is provided on the main shaft 101 and is used to synchronously wind up and unwind the straw rope 103 when it slides towards the slide bar 102 located on the front side; the adjusting assembly is used to control the sliding of the slide bar 102 in the radial direction of the main shaft 101.

[0035] Through the coordinated arrangement of the trimming rope 103 and the sliding rod 102, after the main shaft 101 rotates, the loose trimming rope 103 will tighten under the centrifugal force. The trimming rope 103 between two adjacent sliding rods 102 bends on the horizontal plane, forming an angle. Even if the trimming rope 103 breaks, it will not fly out, ensuring the safety of nearby personnel and equipment. At the same time, when the trimming rope 103 bends and forms an angle, in the direction of rotation of the main shaft 101, one side located on the front of the angle is designated as the working side, which is prone to wear when in contact with grass, while the other side is designated as the waiting side, which does not come into contact with grass. When the working side wears down and its mass decreases, the centrifugal forces on the working side and the waiting side become unequal. By setting up a winding component, the waiting side will move closer to the working side and pass through the bend to form a new working side, while the original working side will be wound up, preventing the trimming rope 103 from breaking.

[0036] An adjustment component is provided, which controls the angle between adjacent sliding rods 102 and the cutting rope 103, thereby changing the cutting direction when the working edge contacts the grass. This makes it easier to cut grass with different sized roots. When encountering grass with larger roots, the angle between the working edge and the grass is reduced, causing the working edge to tilt and cut towards the grass, making it easier to cut the grass and reducing wear on the cutting rope 103.

[0037] In this embodiment, a protective shell 104 is rotatably provided below the vehicle body 100. The protective shell 104 is rotatably connected to the vehicle body 100. The rotation axis of the protective shell 104 is parallel to the axis of the main shaft 101. The main shaft 101 is disposed inside the protective shell 104 and is rotatably connected to the vehicle body 100 through the protective shell 104. The circumferential surface of the main shaft 101 is provided with guide tubes 105 in the same number as the slide rods 102. The guide tubes 105 are located inside the protective shell 104. Each guide tube 105 corresponds to one slide rod 102. Each slide rod 102 passes through the protective shell 104 and is slidably disposed in the corresponding guide tube 105. The slide rod 102 is slidably connected to the protective shell 104.

[0038] In this embodiment, multiple winding assemblies are provided, each corresponding to one haystack rope 103. Each winding assembly includes a winding wheel 106 and a unwinding wheel 107. Both the winding wheel 106 and the unwinding wheel 107 are rotatably mounted on guide tubes 105 and located on the side of the two guide tubes 105 corresponding to the haystack rope 103 that are close to each other. The winding wheel 106 and the unwinding wheel 107 are connected by a drive mechanism. The haystack rope 103 passes through one end of the slide bar 102 located on the front side and is wound around the winding wheel 106. The haystack rope 103 passes through one end of the slide bar 102 located on the rear side and is wound around the unwinding wheel 107. The winding wheel 106 rotates to wind up the haystack rope 103, and the unwinding wheel 107 rotates to release the haystack rope 103. When the trimming rope 103 is subjected to centrifugal force, it exerts tension on the take-up reel 106 and the release reel 107. The take-up reel 106 and the release reel 107 tend to rotate under external force. The rotational tendencies of the take-up reel 106 and the release reel 107 cancel each other out, and the length of the trimming rope 103 between the take-up reel 106 and the release reel 107 remains unchanged. When the working edge of the trimming rope 103 wears down, the tension on the take-up reel 106 decreases, and the rotational tendency of the release reel 107 is greater than that of the take-up reel 106. The release reel 107 then drives the take-up reel 106 to rotate, and the trimming rope 103 between the release reel 107 and the take-up reel 106 will wrap around the take-up reel 106. The release reel 107 will then release a new trimming rope 103, thereby replacing the worn working edge of the trimming rope 103 and preventing the trimming rope 103 from breaking due to excessive wear.

[0039] In this embodiment, the adjustment assembly includes a sliding sleeve 108, a connecting rod 109, and a power unit. One end of the sliding sleeve 108 passes through the protective shell 104 and is sleeved on the main shaft 101. The sliding sleeve 108 is rotatably connected to the protective shell 104. The sliding sleeve 108 is keyed to the main shaft 101 and slidably connected to the main shaft 101 along the axial direction of the main shaft 101. Multiple connecting rods 109 are provided and arranged around the circumferential direction of the main shaft 101. The two ends of each connecting rod 109 are respectively hinged to the sliding sleeve 108 and a sliding rod 102. The power unit is used to control the sliding sleeve 108 to slide on the main shaft 101.

[0040] Specifically, the extension direction of the hinge axis of each connecting rod 109 with the main shaft 101 and the slide rod 102 is perpendicular to the sliding direction of the slide rod 102 and the extension direction of the axis of the main shaft 101; a through groove 110 is provided on the protective shell 104, and one end of the connecting rod 109 is located inside the protective shell 104 and is slidably connected to the protective shell 104 through the through groove 110. After the sliding sleeve 108 slides relative to the main shaft 101, it can control the slide rod 102 to slide in the guide tube 105 through the connecting rod 109. After two adjacent slide rods 102 slide, the included angle at the bend of the trimming rope 103 between them is changed, thereby changing the tilt angle when the working edge of the trimming rope 103 contacts the grass, so that the trimming rope 103 can handle grasses with different root sizes.

[0041] In this embodiment, the power unit includes a push rod 111 and a first motor 112. The push rod 111 is slidably mounted on the vehicle body 100 along its own axis. The push rod 111 is coaxial with the sliding sleeve 108 and is located at the end of the sliding sleeve 108 away from the main shaft 101. The first motor 112 is mounted on the vehicle body 100 and its output shaft is threadedly connected to the push rod 111.

[0042] Specifically, a first spring 113 is provided between the main shaft 101 and the sliding sleeve 108. The first spring 113 connects the main shaft 101 and the sliding sleeve 108. Under the action of the first spring 113, the sliding sleeve 108 abuts against the push rod 111. A plane bearing is provided between the sliding sleeve 108 and the push rod 111. The sliding sleeve 108 and the push rod 111 contact each other through the plane bearing, which can reduce the friction between the sliding sleeve 108 and the push rod 111. The first motor 112 can push the push rod 111 to slide along the axial direction of the main shaft 101 on the vehicle body 100 through threaded engagement with the push rod 111. Under the action of the first spring 113, the sliding sleeve 108 can slide synchronously with the push rod 111 along its own axial direction.

[0043] In this embodiment, the mowing mechanism also includes multiple friction components, each corresponding to a mowing rope 103. Each friction component includes a connecting wheel 114, a friction block 115, and a second spring 116. The connecting wheel 114 is rotatably mounted on the main shaft 101 and is frictionally connected to the take-up wheel 106 and the release wheel 107 between two adjacent slide rods 102. The rotating wheel 119 and the release wheel 107 are driven by the connecting wheel 114. The friction block 115 is slidably mounted on the main shaft 101 and located below the connecting wheel 114. The second spring 116 connects the friction block 115 and the protective shell 104, providing a force for the friction block 115 to move closer to the connecting wheel 114, so that the friction block 115 abuts against the connecting wheel 114, providing resistance to the rotation of the connecting wheel 114. The rotation between the rotating wheel 119 and the release wheel 107 is also subject to resistance, preventing the take-up wheel 106 and the release wheel 107 from rotating after slight wear of the working edge of the mowing rope 103, thus avoiding waste of the mowing rope 103.

[0044] In this embodiment, the main shaft 101 is provided with a plurality of telescopic rods 117 arranged along the axial direction of the main shaft 101. Each telescopic rod 117 extends and retracts along the axial direction of the main shaft 101 and abuts against a friction block 115. The end of the telescopic rod 117 away from the main shaft 101 and the side of the friction block 115 that contacts the connecting wheel 114 are both U-shaped. When the telescopic rod 117 abuts against the corresponding friction block 115, it can avoid the connecting wheel 114. The telescopic rod 117 is provided with a third spring 118 to provide power for the resetting of the telescopic rod 117. When the telescopic rod 117 contacts the friction block 115, the third spring 118 is in a compressed state. When the sliding sleeve 108 moves away from the friction block 115, the telescopic rod 117 extends, reducing the contact force between the telescopic rod 117 and the friction block 115. At this time, the friction between the friction block 115 and the connecting wheel 114 increases, and the length of the trimming rope 103 between two adjacent sliding rods 102 increases. The angle between the working side and the waiting side decreases, enabling the processing of grass with smaller roots and increasing the resistance of the waiting side replacing the working side. This allows the trimming rope 103 to play a more effective role without breaking, reducing waste.

[0045] In this embodiment, a rotating wheel 119 is provided on the protective shell 104. The rotating wheel 119 is rotatably connected to the protective shell 104. The rotating wheel 119 is sleeved on the sliding sleeve 108 and is slidably connected to the sliding sleeve 108 in the axial direction of the sliding sleeve 108. The rotating wheel 119 is keyed to the sliding sleeve 108 to rotate synchronously with the sliding sleeve 108. A second motor 120 is provided on the vehicle body 100 to drive the rotating wheel 119 to rotate.

[0046] Specifically, a transmission belt 121 is wound around the output end of the second motor 120 and the rotating wheel 119. The second motor 120 drives the rotating wheel 119 to rotate through the transmission belt 121, and the rotating wheel 119 drives the sliding sleeve 108 to rotate through its cooperation with the sliding sleeve 108.

[0047] In this embodiment, each slide rod 102 is provided with two guide wheels 122 that rotate around their own axis. The two guide wheels 122 are located on both sides of the slide rod 102 in the axial direction of the main shaft 101, and the axis of the guide wheels 122 is parallel to the axis of the main shaft 101. The guide wheels 122 are located outside the protective shell 104, and the trimming rope 103 between two adjacent slide rods 102 is wound around the corresponding two guide wheels 122. This can reduce the friction between the trimming rope 103 and the slide rod 102 and extend the service life of the trimming rope 103.

[0048] In this embodiment, a probe 123 is provided on the vehicle body 100 to detect the size of the roots and stems of unharvested grass in front of the vehicle body 100 as it travels. The data fed back by the probe 123 controls the start of the first motor 112, thereby changing the length of the grass-cutting rope 103 between two adjacent slide bars 102 and adjusting the angle between the working side and the waiting side of the grass-cutting rope 103, which can better cut the grass and prevent it from breaking itself.

[0049] The working principle of the low-noise intelligent lawnmower provided in the above embodiment is as follows:

[0050] First, the second motor 120 is started. The second motor 120 drives the sliding sleeve 108 to rotate via the transmission belt 121. The rotation of the sliding sleeve 108 drives the main shaft 101 and the protective shell 104 to rotate. The main shaft 101 drives the sliding rod 102 to rotate via the guide tube 105. The straw-cutting rope 103 between two adjacent sliding rods 102 is moved away from the main shaft 101 by centrifugal force and rotates with the main shaft 101. In the rotation direction of the main shaft 101, the working side of the straw-cutting rope 103 is located in front of the side to be worked. As the vehicle body 100 moves forward, the working side of the straw-cutting rope 103 breaks the grass it comes into contact with.

[0051] As the vehicle body 100 moves forward, the probe 123 on the vehicle body 100 identifies the grass that is about to be cut, thereby controlling the angle between the working side and the waiting side. When grass with large roots is detected, the first motor 112 starts. The rotation of the first motor 112 drives the push rod 111 to slide downward through the threaded engagement with the push rod 111. The push rod 111 pushes the sliding sleeve 108 to slide downward. The sliding sleeve 108 drives the sliding rod 102 away from the main shaft 101 through the connecting rod 109. The distance between the two guide wheels 122 that are close to each other on the two adjacent sliding rods 102 increases, the length of the grass-cutting rope 103 between the two guide wheels 122 is shortened, and the included angle between the working side and the waiting side increases. The distance between the bend of the grass-cutting rope 103 and the main shaft 101 decreases. When the grass-cutting rope 103 rotates around the circumferential direction of the main shaft 101, it changes the contact angle with the grass, increases the contact area between the working side and the grass, and breaks the grass by "cutting". This saves effort and avoids large wear on the grass-cutting rope 103 due to the instantaneous impact with the grass.

[0052] When grass with small roots is detected, the first motor 112 starts and reverses. Through its cooperation with the push rod 111, the push rod 111 slides upward. The contact force between the push rod 111 and the sliding sleeve 108 decreases. The first spring 113 releases energy and pushes the sliding sleeve 108 to slide upward relative to the main shaft 101. The sliding sleeve 108 drives the sliding rod 102 to move closer to the main shaft 101 through the connecting rod 109. The distance between the two guide wheels 122 that are close to each other on the two adjacent sliding rods 102 decreases. The length of the grass-cutting rope 103 between the two guide wheels 122 increases. The angle between the working side and the waiting side of the grass-cutting rope 103 decreases. The distance between the bend of the grass-cutting rope 103 between the two adjacent sliding rods 102 and the main shaft 101 increases. This allows grass to be cut over a larger area, improving efficiency.

[0053] When the working edge of the grass trimming rope 103 wears down, the tension of its working edge on the take-up reel 106 is less than the tension of the waiting edge on the release reel 107. The release reel 107 rotates and drives the take-up reel 106 to rotate through the connecting wheel 114. The release reel 107 releases the grass trimming rope 103 wound on it, and the take-up reel 106 winds up the grass trimming rope 103. The worn grass trimming rope 103 gradually approaches the take-up reel 106 and is wound on the take-up reel 106.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A low-noise intelligent lawnmower, characterized in that, The device includes a mowing mechanism and a mobile vehicle body. The mowing mechanism comprises a main shaft, sliding rods, a winding assembly, and an adjusting assembly. The main shaft is vertically mounted on the vehicle body and rotatably connected to it. Multiple sliding rods are arranged circumferentially along the main shaft and slidably mounted on it radially. Mowing ropes are wound between adjacent sliding rods, with both ends passing through the corresponding sliding rods from the side furthest from the main shaft towards the side closest to it. The length of the mowing rope between adjacent sliding rods is greater than the distance between the ends of the two sliding rods furthest from the main shaft, and the mowing ropes are slidably connected to the sliding rods. The mowing ropes can slide from the rear sliding rod towards the front sliding rod in the direction of main shaft rotation. The winding assembly is mounted on the main shaft and is used to simultaneously wind and unwind the mowing ropes as they slide towards the front sliding rod. The adjusting assembly controls the sliding of the sliding rods radially along the main shaft. A protective shell is rotatably mounted on the underside of the vehicle body, rotatably connected to the vehicle body. The axis of rotation of the protective shell is parallel to the axis of the main shaft. The main shaft is housed within the protective shell and rotatably connected to the vehicle body via the protective shell. Guide tubes, matching the number of slide rods, are located on the circumference of the main shaft. Each guide tube corresponds to one slide rod, and each slide rod penetrates the protective shell and slides within its corresponding guide tube. The slide rods are slidably connected to the protective shell. Multiple take-up assemblies are provided, each corresponding to one straw rope. Each take-up assembly includes a take-up reel and a release reel, both rotatably mounted on guide tubes and located on the side of the two guide tubes corresponding to the straw rope that are close to each other. The upper part of the main shaft is connected to the take-up and release wheels via a drive mechanism. The grass-cutting rope passes through one end of a slide bar located at the front and is wound around the take-up wheel. The grass-cutting rope passes through one end of a slide bar located at the rear and is wound around the release wheel. The take-up wheel rotates to wind up the grass-cutting rope, and the release wheel rotates to release the grass-cutting rope. The adjustment assembly includes a sliding sleeve, connecting rods, and a power unit. One end of the sliding sleeve passes through the protective shell and is fitted onto the main shaft. The sliding sleeve is rotatably connected to the protective shell and is keyed to the main shaft and slidably connected to the main shaft along its axial direction. Multiple connecting rods are provided, arranged around the circumference of the main shaft. The two ends of each connecting rod are hinged to the sliding sleeve and a slide bar, respectively. The power unit is used to control the sliding of the sliding sleeve on the main shaft.

2. The low-noise intelligent lawnmower according to claim 1, characterized in that, The power unit includes a push rod and a first motor. The push rod is slidably mounted on the vehicle body along its own axis. The push rod is coaxial with the sliding sleeve and is located at the end of the sliding sleeve away from the main shaft. The first motor is mounted on the vehicle body and its output shaft is threadedly connected to the push rod.

3. The low-noise intelligent lawnmower according to claim 1, characterized in that, The mowing mechanism also includes multiple friction components, each corresponding to a mowing rope. Each friction component includes a connecting wheel, a friction block, and a second spring. The connecting wheel is rotatably mounted on the main shaft and is frictionally connected to the take-up and release wheels between two adjacent slide rods. The take-up and release wheels are driven by the connecting wheel. The friction block is slidably mounted on the main shaft and located below the connecting wheel. The second spring connects the friction block and the protective shell, providing a force for the friction block to move closer to the connecting wheel, so that the friction block abuts against the connecting wheel, providing resistance to the rotation of the connecting wheel.

4. A low-noise intelligent lawnmower according to claim 3, characterized in that, The main shaft is equipped with multiple telescopic rods arranged along the axis of the main shaft. Each telescopic rod extends and retracts along the axial direction of the main shaft and abuts against a friction block.

5. A low-noise intelligent lawnmower according to claim 1, characterized in that, The protective shell is equipped with a rotating wheel, which is sleeved on the sliding sleeve and slidably connected to the sliding sleeve in the axial direction of the sliding sleeve. The rotating wheel is keyed to the sliding sleeve to rotate synchronously with the sliding sleeve. A second motor is provided on the vehicle body to drive the rotating wheel to rotate.

6. A low-noise intelligent lawnmower according to claim 1, characterized in that, Each slide bar is equipped with two guide wheels that rotate around their own axis. The two guide wheels are located on both sides of the slide bar in the axial direction of the main shaft, and the axis of the guide wheels is parallel to the axis of the main shaft. The guide wheels are located outside the protective shell, and the straw rope between two adjacent slide bars is wound around the corresponding two guide wheels.

7. A low-noise intelligent lawnmower according to claim 1, characterized in that, The vehicle is equipped with a probe to detect the size of the roots of unharvested grass in front of it.

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