A lawnmower

Abstract

This application discloses a lawnmower, including a base and a mowing assembly. A first walking assembly and a second walking assembly are respectively installed at the front and rear ends of the base. A mounting cavity is provided at the front end of the base, and a drive mechanism for driving the first walking assembly is installed in the mounting cavity. The base also has a mowing chamber and a grass-collecting air duct that are interconnected. The mowing assembly is rotatably mounted in the mowing chamber, and the mowing assembly generates negative pressure in the mowing chamber and the grass-collecting air duct through its own rotation. An adjustment assembly for adjusting the height of the second walking assembly is provided between the base and the second walking assembly. The advantages of this application are: placing the drive mechanism at the front end of the base can shift the center of gravity of the lawnmower forward, preventing the front end of the lawnmower from tilting upward during operation; in addition, placing the drive assembly at the front saves space at the rear of the base, allowing the length of the grass-collecting air duct to be designed shorter, which can effectively improve the grass-collecting efficiency of the lawnmower.

Description

Technical Field

[0001] This application relates to the field of lawnmower technology, and in particular to a lawnmower. Background Technology

[0002] With the continuous expansion of urban green areas, greening maintenance personnel need to frequently trim the shape of the greenery to maintain its overall aesthetic appeal. Lawn mowers, as a commonly used greening trimming tool, primarily use internal cutting blades to cut the greenery, making it smoother and more attractive. To further improve the ease of use of lawn mowers, wheels are usually installed at both ends, and a drive mechanism is also added to reduce the physical exertion of the operator.

[0003] In existing technology, the drive mechanism on lawnmowers is generally rear-mounted, meaning it's installed at the rear. While the installation point of the drive mechanism doesn't affect the driving force of the wheels, this rearward placement shifts the lawnmower's center of gravity further back. Furthermore, the handle is also located at the rear. When the operator grips the handle and pushes the lawnmower forward, the front end may tilt due to instability, negatively impacting mowing performance. In addition, a rearward-mounted drive mechanism increases the length of the grass-collecting air duct, reducing grass-collecting efficiency. Therefore, it's necessary to improve existing lawnmower technology. Utility Model Content

[0004] One of the objectives of this application is to provide a lawnmower that can solve at least one of the defects in the aforementioned background art.

[0005] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a lawnmower, comprising a base and a mowing assembly, wherein a first walking assembly and a second walking assembly are respectively installed at the front and rear ends of the base, and a mounting cavity is provided at the front end of the base, wherein a drive mechanism for driving the first walking assembly is installed in the mounting cavity; the base is also provided with a mowing chamber and a grass collecting air duct that are interconnected, the mowing assembly is rotatably mounted in the mowing chamber, and the mowing assembly generates negative pressure in the mowing chamber and the grass collecting air duct by its own rotation; an adjustment assembly for adjusting the height of the second walking assembly is provided between the base and the second walking assembly.

[0006] By placing the drive mechanism at the front of the base, the lawnmower's center of gravity is more forward, preventing the front from tilting upwards when the user pushes it. This allows the mowing components to work smoothly on the greenery, improving the mowing effect. Furthermore, since placing the drive component at the front saves space at the rear of the base, the length of the grass collection duct can be shortened, thus improving the lawnmower's grass collection efficiency.

[0007] Preferably, the mowing chamber is circular, and the mowing assembly includes a cutting blade and a turntable. The cutting blade is located inside the mowing chamber and fixedly connected to the turntable. The turntable is rotatably mounted on the base, and the turntable is concentrically arranged with the mowing chamber. This arrangement allows the turntable to drive the cutting blade to rotate at high speed, quickly and cleanly trimming the greenery.

[0008] Preferably, the base is also equipped with a motor for driving the turntable to rotate.

[0009] Preferably, the motor is eccentrically positioned relative to the turntable, and the motor is close to the drive mechanism. A connecting mechanism is provided between the motor and the turntable. This configuration shifts the lawnmower's center of gravity forward, and the forward-positioned drive mechanism makes the mower's mowing operation more stable. The motor can drive the turntable to rotate via the connecting mechanism.

[0010] Preferably, the connecting mechanism is a connecting belt, which is ring-shaped. The motor is equipped with a rotating shaft, and the connecting belt is simultaneously sleeved with both the turntable and the rotating shaft. The rotating shaft of the motor drives the connecting belt to synchronously rotate the turntable. With this configuration, when the motor is running, the rotating shaft can use the friction of the connecting belt to drive the turntable to rotate synchronously.

[0011] Preferably, the rear end of the base is provided with a grass collection outlet that communicates with the grass collection duct. A baffle for blocking grass clippings is rotatably mounted on the base. The bottom of the baffle is bent inward and cooperates with the base to form a discharge port. This arrangement can prevent grass clippings from spraying outward from the grass collection outlet, ensuring that the grass clippings can only be discharged through the discharge port under the action of the baffle.

[0012] Preferably, the adjustment assembly includes a mounting plate and a limiting rod. The mounting plate is rotatably mounted on the rear end of the base, and the second walking assembly is rotatably mounted on the mounting plate. The base has multiple gear grooves, and the mounting plate has limiting holes. The limiting rod is used to pass through the gear grooves and insert into the limiting holes. With this configuration, the user can adjust the height of the second walking assembly by rotating the mounting plate. When adjusting the height, the user can pull out the limiting rod, then rotate the mounting plate to align the limiting hole with the corresponding height gear groove, and then pass the limiting rod through the gear groove and insert it into the limiting rod to lock the adjusted height of the second walking assembly.

[0013] Preferably, the second walking component includes two second wheels and two second axles. The two second wheels are respectively mounted on both sides of the base and connected by the second axle. Either second wheel can drive the other second wheel to rise / fall synchronously. This configuration allows the adjustment component to be positioned on either side of the base, enabling synchronous adjustment of the second wheel on the other side, further improving the convenience of lawnmower height adjustment.

[0014] Preferably, the first walking assembly includes a first wheel, a connecting plate, and a first axle. The first wheel is rotatably mounted on the connecting plate, and the two are concentrically arranged. A drive section is provided on the first axle, which passes through the connecting plate and is eccentrically connected to the first wheel. The outer contour of the drive section and the inner contour of the first wheel are provided with mutually cooperating teeth. A linkage mechanism is provided between the connecting plate and the mounting plate. This arrangement allows the first wheel to rotate synchronously via the drive section, and the linkage mechanism ensures that the height of the first walking assembly can be synchronously adjusted with the height of the second walking assembly. The eccentric arrangement of the first wheel and the drive section reduces vibration and noise in the mechanical transmission, making the lawnmower move more smoothly.

[0015] Preferably, the linkage mechanism is a connecting rod, one end of which is hinged to the connecting plate and the other end to the mounting plate. The second traveling component drives the first traveling component to adjust its height synchronously via the connecting rod. With this configuration, when the height of the second traveling component changes, the angle of the connecting rod also changes, thereby driving the first traveling component to rise / fall synchronously.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] The lawnmower of this invention features a drive mechanism positioned at the front of the base. This shifts the lawnmower's center of gravity towards the front, preventing the front from tilting upwards when the user pushes it. This allows the mowing components to operate smoothly on the greenery, improving the mowing effect. Furthermore, placing the drive component at the front saves space at the rear of the base, allowing for a shorter grass collection duct and thus increasing the lawnmower's grass collection efficiency.

[0018] The height of the second walking component can be adjusted according to the actual terrain using an adjustment mechanism. When the height of the second walking component changes, it will also drive the first walking component to rise / fall synchronously via a connecting rod; this further improves the lawnmower's adaptability to the working environment. This invention has the advantages of stable operation, high grass collection efficiency, and strong environmental adaptability. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall structure of the lawnmower in this application.

[0020] Figure 2 This is a partial structural diagram of the lawnmower in this application. Figure 1 .

[0021] Figure 3 This is a partial structural diagram of the lawnmower in this application. Figure 2 .

[0022] Figure 4 This is a partial structural diagram of the lawnmower in this application. Figure 3 .

[0023] Figure 5 for Figure 4 A magnified structural diagram of part A in the middle.

[0024] Figure 6 This is a schematic diagram of the connection structure between the first and second walking components of this application. Figure 1 .

[0025] Figure 7 This is a schematic diagram of the connection structure between the first and second walking components of this application. Figure 2 .

[0026] Figure 8 for Figure 7 A magnified structural diagram of part B in the middle section.

[0027] In the diagram: 1. First walking assembly; 11. First wheel; 12. Connecting plate; 13. First axle; 130. Drive section; 100. Drive mechanism; 2. Second walking assembly; 21. Second wheel; 22. Second axle; 200. Turntable; 201. Cutting blade; 3. Base; 31. Cutting chamber; 32. Grass collecting air duct; 33. Grass collecting outlet; 34. Gear groove; 300. Motor; 301. Connecting belt; 4. Adjustment assembly; 41. Mounting plate; 42. Limiting rod; 400. Baffle; 410. Limiting hole; 500. Connecting rod. Detailed Implementation

[0028] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and 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 should not be construed as limiting the specific protection scope of this application.

[0030] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0031] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application 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.

[0032] One aspect of this application provides a lawnmower, such as Figure 1 and Figure 2 As shown, one preferred embodiment includes a base 3 and a mowing assembly. A first walking assembly 1 and a second walking assembly 2 are respectively installed at the front and rear ends of the base 3. A mounting cavity is provided at the front end of the base 3, and a drive mechanism 100 for driving the first walking assembly 1 is installed in the mounting cavity. When the lawnmower needs to move forward, the drive mechanism 100 can drive the first walking assembly 1 to move the base 3, which can further improve the working efficiency of the lawnmower. Under normal circumstances, the force applied by the user when pushing the lawnmower forward is decomposed into a vertically downward component. When this component acts on the rear end of the lawnmower, if the center of gravity of the lawnmower is rearward, it may cause the front end of the lawnmower to tilt upward, thereby reducing the mowing efficiency of the lawnmower. However, by placing the drive mechanism 100 at the front end of the base 3, the center of gravity of the lawnmower is more biased towards the front end, avoiding the phenomenon of the front end tilting upward when the user pushes the lawnmower, so that the mowing assembly can act smoothly on the greenery and improve the mowing effect of the lawnmower.

[0033] Specifically, such as Figure 3As shown, the base 3 is also equipped with a mowing chamber 31 and a grass-collecting air duct 32 that are interconnected. The mowing component is rotatably mounted in the mowing chamber 31. When the greenery extends into the mowing chamber 31, it can be cut by the high-speed rotating mowing component. The mowing component can also create negative pressure in the mowing chamber 31 and the grass-collecting air duct 32 through its own rotation, ensuring that the cut grass clippings are discharged to the outside along the grass-collecting air duct 32 under the action of negative pressure. In addition, in order to enable the lawnmower to adapt to different terrains, an adjustment component 4 is provided between the base 3 and the second walking component 2 for adjusting the height of the second walking component 2. When the terrain changes, the height of the base 3 from the ground can be changed by adjusting the component 4 to avoid the mowing efficiency of the lawnmower being limited by the terrain.

[0034] Understandably, placing the drive assembly at the front will save some space behind the base 3, thus allowing the grass collection duct 32 to be designed to be shorter, thereby improving the grass collection efficiency of the lawnmower.

[0035] In this embodiment, as Figure 3 As shown, the mowing chamber 31 is circular. The mowing assembly includes a cutting blade 201 and a turntable 200. The cutting blade 201 is located inside the mowing chamber 31 and is fixedly connected to the turntable 200. The turntable 200 is rotatably mounted on the base 3, and can drive the cutting blade 201 to rotate at high speed to quickly and cleanly trim the greenery. Furthermore, the turntable 200 is concentrically positioned with the mowing chamber 31 to ensure more even force distribution on the cutting blade 201 during cutting, reducing wear and tear and extending the blade's lifespan.

[0036] Furthermore, a motor 300 for driving the turntable 200 to rotate is mounted on the base 3. The motor 300 is eccentrically positioned relative to the turntable 200 and is close to the drive mechanism 100. When the weight of the drive mechanism 100 alone is insufficient to prevent the front end of the lawnmower from tilting up, moving the motor 300 forward can further increase the weight of the front end of the lawnmower in conjunction with the drive mechanism 100. This shifts the center of gravity of the lawnmower further forward, resulting in a more stable mowing action. In addition, a connecting mechanism is provided between the motor 300 and the turntable 200 to enable the eccentrically positioned motor 300 to drive the turntable 200 to move.

[0037] Specifically, such as Figure 2As shown, the connecting mechanism is a ring-shaped connecting belt 301, which is simultaneously sleeved with the rotating shafts of both the turntable 200 and the motor 300. When the motor 300 is running, the rotating shaft rotates, driving the connecting belt 301 to rotate synchronously. The friction between the connecting belt 301 and the turntable 200 then drives the turntable 200 to rotate. The rotational speed of the turntable 200 can be increased by increasing the rotational speed of the rotating shaft, or by installing a larger rotating wheel on the transmission shaft.

[0038] In this embodiment, as Figure 4 As shown, the rear end of the base 3 is provided with a grass collection outlet 33 that communicates with the grass collection duct 32. A baffle 400 for blocking grass clippings is also rotatably installed on the base 3, and the bottom of the baffle 400 is bent inward to cooperate with the base 3 to form a discharge port. When grass clippings are discharged from the grass collection duct 32 to the grass collection outlet 33, the baffle 400 can block the outflowing grass clippings to prevent them from spraying out of the grass collection outlet 33 in all directions; the blocked grass clippings will be discharged uniformly through the discharge port. Of course, under certain circumstances, the baffle 400 can also be lifted and a collection component can be installed at the discharge port to improve the grass clipping collection speed.

[0039] In this embodiment, as Figures 4-8 As shown, the adjustment assembly 4 includes a mounting plate 41 and a limiting rod 42. The mounting plate 41 is rotatably mounted on the rear end of the base 3, and the second walking assembly 2 is rotatably mounted on the mounting plate 41. The base 3 is provided with multiple gear grooves 34 arranged along an arc. The upper part of the mounting plate 41 is provided with a limiting hole 410 for insertion and engagement with the limiting rod 42. When it is necessary to adjust the height of the base 3, the user can pull out the limiting rod 42, then rotate the mounting plate 41 to align the limiting hole 410 with the other gear grooves 34, and then insert the limiting rod 42 through the corresponding gear groove 34 into the limiting hole 410 to lock the position of the mounting plate 41. In this way, the distance from the base 3 to the ground can be adjusted by changing the relative height between the second walking assembly 2 and the base 3. Thus, when the lawnmower encounters different terrains, the adjustment assembly 4 can be used to make the lawnmower more adaptable to the new terrain.

[0040] Specifically, such as Figure 6 As shown, the second walking assembly 2 includes two second wheels 21 and a second axle 22. The two second wheels 21 are respectively mounted on both sides of the base 3 and connected by the second axle 22, so that either second wheel 21 can drive the other second wheel 21 to rise / fall synchronously. When the user needs to adjust the height of the lawnmower, the height of both second wheels 21 can be changed simultaneously by adjusting the adjustment assembly 4 mounted on one side of the base 3, further improving the convenience of lawnmower height adjustment.

[0041] Furthermore, such as Figure 6 , Figure 7 and Figure 8 As shown, the first walking assembly 1 includes a first wheel 11, a connecting plate 12, and a first axle 13. The first wheel 11 is rotatably mounted on the connecting plate 12, and the two are concentrically arranged. A drive section 130 is provided on the first axle 13, which passes through the connecting plate 12 and is eccentrically connected to the first wheel 11. The eccentric arrangement reduces vibration and noise in the mechanical transmission, thus making the lawnmower move more smoothly. The outer contour of the drive section 130 and the inner contour of the first wheel 11 are both provided with meshing teeth. When the drive mechanism 100 drives the first axle 13 to rotate, the drive section 130 can drive the first wheel 11 to rotate through the meshing teeth, thereby enabling the lawnmower to move. In addition, a linkage mechanism is also provided between the connecting plate 12 and the mounting plate 41.

[0042] Understandably, when the height of the second wheel 21 changes, the first wheel 11 can be adjusted synchronously under the drive of the linkage mechanism to ensure that the first wheel 11 and the second wheel 21 are always on the same horizontal plane. In addition, it can also avoid installing the adjustment component 4 at the front of the lawnmower, further simplifying the structure of the lawnmower.

[0043] In this embodiment, as Figure 6 and Figure 7 As shown, the linkage mechanism is a connecting rod 500. One end of the connecting rod 500 is hinged to the connecting plate 12, and the other end is hinged to the mounting plate 41, so that the second traveling component 2 drives the first traveling component 1 to adjust its height synchronously through the connecting rod 500. When the height of the second traveling component 2 changes, the angle of the connecting rod 500 also changes accordingly, thereby driving the first traveling component 1 to rise / fall synchronously. Of course, in addition to the connecting rod 500, those skilled in the art can design other structures for the linkage mechanism, as long as they enable the first traveling component 1 to follow the second traveling component 2 in synchronous adjustment, they can meet the requirements of this application.

[0044] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A lawnmower, comprising a base (3) and a mowing assembly, wherein a first walking assembly (1) and a second walking assembly (2) are respectively mounted on the front and rear ends of the base (3), characterized in that, The base (3) has an installation cavity at its front end, and a drive mechanism (100) for driving the first walking component (1) is installed in the installation cavity. The base (3) also has a mowing cavity (31) and a grass collecting air duct (32) that are interconnected. The mowing component is rotatably installed in the mowing cavity (31). The mowing component generates negative pressure in the mowing cavity (31) and the grass collecting air duct (32) by rotating itself. An adjustment component (4) for adjusting the height of the second walking component (2) is provided between the base (3) and the second walking component (2).

2. The lawnmower as described in claim 1, characterized in that, The mowing chamber (31) is circular. The mowing assembly includes a cutting blade (201) and a turntable (200). The cutting blade (201) is located inside the mowing chamber (31) and is fixedly connected to the turntable (200). The turntable (200) is rotatably mounted on the base (3) and is concentrically arranged with the mowing chamber (31).

3. The lawnmower as described in claim 2, characterized in that, The base (3) is also equipped with a motor (300) for driving the turntable (200) to rotate.

4. The lawnmower as described in claim 3, characterized in that, The motor (300) is eccentrically positioned with respect to the turntable (200), and the motor (300) is close to the drive mechanism (100). A connecting mechanism is provided between the motor (300) and the turntable (200).

5. The lawnmower as described in claim 4, characterized in that, The connecting mechanism is a connecting belt (301), which is ring-shaped. The motor (300) is provided with a rotating shaft. The connecting belt (301) is simultaneously connected to the turntable (200) and the rotating shaft. The rotating shaft of the motor (300) is used to drive the connecting belt (301) to drive the turntable (200) to rotate synchronously.

6. The lawnmower as described in claim 1, characterized in that, The rear end of the base (3) is provided with a grass collection outlet (33) that is connected to the grass collection air duct (32). A baffle (400) for blocking grass clippings is rotatably installed on the base (3). The bottom of the baffle (400) is bent inward and cooperates with the base (3) to form a discharge port.

7. The lawnmower as described in claim 1, characterized in that, The adjustment component (4) includes a mounting plate (41) and a limiting rod (42). The mounting plate (41) is rotatably mounted on the rear end of the base (3), and the second walking component (2) is rotatably mounted on the mounting plate (41). The base (3) is provided with a plurality of gear grooves (34), and the mounting plate (41) is provided with a limiting hole (410). The limiting rod (42) is used to pass through the gear grooves (34) and be inserted into the limiting hole (410).

8. The lawnmower as described in claim 7, characterized in that, The second walking component (2) includes a second wheel (21) and a second axle (22). There are two second wheels (21). The two second wheels (21) are respectively installed on both sides of the base (3). The two second wheels (21) are connected by the second axle (22). Either second wheel (21) can drive the other second wheel (21) to rise / fall synchronously.

9. The lawnmower as described in claim 8, characterized in that, The first walking assembly (1) includes a first wheel (11), a connecting plate (12) and a first axle (13). The first wheel (11) is rotatably mounted on the connecting plate (12) and the two are concentrically arranged. A drive section (130) is provided on the first axle (13). The drive section (130) passes through the connecting plate (12) and is eccentrically connected to the first wheel (11). The outer contour of the drive section (130) and the inner contour of the first wheel (11) are both provided with mutually cooperating teeth. A linkage mechanism is provided between the connecting plate (12) and the mounting plate (41).

10. The lawnmower as described in claim 9, characterized in that, The linkage mechanism is a connecting rod (500). One end of the connecting rod (500) is hinged to the connecting plate (12), and the other end is hinged to the mounting plate (41). The second walking component (2) drives the first walking component (1) to adjust its height synchronously through the connecting rod (500).

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