Hand push mower

Abstract

This application discloses a push lawnmower, including a body (10), a front wheel assembly (40), a rear wheel assembly (50), the rear wheel assembly (50) including a pair of rear wheels (52), the front wheel assembly (40) and the rear wheel assembly (50) being disposed on the body (10), a body height adjustment component (60) including at least two gears, and a leveling component (20). When the body (10) is in an upright state, the straight line formed by the contact point between the leveling component (20) and the ground and the contact point between the rear wheel (52) and the ground is L. The distance between the intersection of the vertical line where the center of gravity of the body (10) is located and the straight line L and the midpoint of the straight line L is less than or equal to ±150mm, so that the body can maintain a good standing state in each gear, eliminating the risk of shaking or tipping of the body in an upright state, and ensuring that the body can have high standing stability in each gear.

Description

Technical Field

[0001] This invention belongs to the technical field of lawnmowers, specifically relating to a push lawnmower. Background Technology

[0002] In existing technology, lawnmowers fold the handle using a shift plate to minimize the machine's footprint and maintain an upright position through the shift plate's support structure. This design makes the lawnmower easier to store in space-constrained environments such as garages or tool sheds. However, with the use of height-adjustable components, users can flexibly adjust the lawnmower's height to suit different lawn conditions and personal preferences. But this also leads to several potential problems:

[0003] When the height adjustment mechanism of a lawnmower is adjusted, the center of gravity of the entire machine may rise. This change in height makes the lawnmower more prone to losing balance when stored vertically or near vertically. Furthermore, the storage area is susceptible to lateral forces or uneven external disturbances, increasing the probability of displacement and eventual tipping over when the machine is stored upright. Additionally, ground conditions vary, and the flatness of the contact area between the shift plate and the ground is often inconsistent, resulting in a smaller actual contact area and potentially insufficient firmness at all points. This weakens the machine's overall support. The increased center of gravity after the height adjustment mechanism is adjusted further exacerbates this effect when combined with irregularly distributed protrusions or depressions on the ground. Moreover, during the production, assembly, and use of the lawnmower, manufacturing and assembly errors may lead to asymmetry on both sides of the shift plate, or vibration-induced loosening due to lack of timely maintenance after use. This error can cause an imbalance when the shift paddles and rear wheels contact the ground, resulting in a wobbling of the aircraft. This imbalance becomes more pronounced with the change in the center of gravity after altitude adjustment, increasing the risk of tilting or overturning. Furthermore, this instability also increases the possibility of scraping and abrading the ground.

[0004] Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is the poor standing stability of the lawnmower.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, a push lawnmower is provided, including a body, a leveling component, a body height adjustment component, a shift plate, a front wheel assembly, a rear wheel assembly, and a cutting component. The rear wheel assembly includes a rotating shaft and a pair of rear wheels. The two ends of the rotating shaft are respectively connected to the pair of rear wheels. The rotating shaft is mounted on the body and connected to the body through two assembly points. The straight line connecting the two assembly points constitutes a first axis, and the straight line connecting the centers of the pair of rear wheels constitutes a second axis. The first axis and the second axis are not coaxial. The body height adjustment component includes at least two positions. The body height adjustment component drives the rear wheels around the first axis. The center rotates to adjust the height. The shift plate is used to fold the handle of the machine body and keep the machine body upright when the handle is in the retracted state. The shift plate includes a main body and a support body. The main body is connected to the machine body. The support body is equipped with a leveling component for direct contact with the ground. The rear wheel is tangent to the ground when the machine body is upright. When the height adjustment component is in the lowest position, the tangent line of the rear wheel located on the side of the rear wheel away from the front wheel assembly and passing through the preset point W of the leveling component is L1. When the height adjustment component is in the highest position, the tangent line of the rear wheel located on the side of the rear wheel away from the front wheel assembly and passing through the preset point W of the leveling component is L2. The included angle β between the tangent lines L1 and L2 is an acute angle. By setting the rear wheel and the pivot axis to different axes, the height adjustment component can drive the rear wheel to rotate to achieve height adjustment. Furthermore, in the lowest and highest gears, the angle β between the tangents L1 and L2 of the rear wheel (located on the side furthest from the front wheel assembly and passing through the preset point W of the leveling component) is acute. This ensures that when the machine is stored upright, it has a sufficiently wide and stable low surface in all gear positions to resist minor vibrations or external impacts. Simultaneously, the angle between the rear wheel and the support is controlled to fluctuate within a small angle range between gear positions. By optimizing the support structure and geometric parameters, its mechanical performance is improved, better addressing issues related to mechanical movement. During the process, structural changes caused fluctuations in the center of gravity. To ensure the equipment can reliably withstand complex external factors, the overall anti-tipping performance is improved, allowing the machine to be stored more safely and stably vertically. In addition, by setting leveling components on the support, these components can adapt to different terrains and provide optimal support for the machine body. Combined with the coordination of the rear wheel position, this ensures the machine body's stability at any gear, effectively reduces ground wear caused by friction, and provides additional shock absorption, dispersing the pressure on the support and further enhancing the machine body's stability, eliminating the risk of swaying or tipping when the machine is upright.

[0007] Optionally, in at least one gear position, at least a portion of the leveling component is in contact with the ground, wherein the hardness of the leveling component is less than the hardness of the support portion. With this configuration, the leveling component can better adapt to minor irregularities on the surface, thereby improving the fit between the device and uneven ground during overall installation, reducing imbalance when the shift plate and rear wheels are in contact with the ground, and allowing the leveling component to absorb some force when subjected to lateral forces or non-uniform external disturbances, thus reducing imbalance when the shift plate and rear wheels are in contact with the ground, and preventing the shift plate from scraping and abrading the ground during shaking.

[0008] Optionally, in the upright position, the straight line formed by the contact point between the leveling component and the ground and the contact point between the rear wheel and the ground is L. The distance between the intersection of the vertical line of the machine's center of gravity and the straight line L and the midpoint of the straight line L is less than or equal to ±150mm. This configuration ensures that the machine maintains a good standing position in all gears, eliminating the risk of swaying or tipping in the upright position and guaranteeing high standing stability in all gears.

[0009] Optionally, the included angle β is less than or equal to 15°. This setting ensures that the aircraft body has the smallest possible angular deviation in each gear position, preventing excessive shift in the aircraft's center of gravity and guaranteeing high stability in all gear positions.

[0010] Optionally, the size of the rear wheel is the same as that of the front wheel of the front wheel assembly, and the rotation angle θ of the rear wheel satisfies: 90°≤θ≤270°, and the distance between the second axis and the first axis is greater than or equal to the vertical distance between the lowest cutting plane of the push mower and the highest and lowest settings of the body height adjustment mechanism; or the size of the rear wheel is greater than or equal to the size of the front wheel of the front wheel assembly, and the rotation angle θ of the rear wheel satisfies: 90°<θ<270°, and the distance between the second axis and the first axis is greater than the vertical distance between the lowest cutting plane of the push mower and the highest and lowest settings of the body height adjustment mechanism; wherein, the lowest cutting plane is the cutting plane of the cutting element when cutting at the lowest setting. Through the above settings, when the shift plate and rear wheel support the machine body upright, and when controlling the change in the angle relationship between the rear wheel and the support part between each setting to fluctuate within a small angle range, the rearward shift angle of the center of gravity is smaller, and the angle between the shift plate and the ground when the machine body is laid flat is smaller, making the machine body more compact, shortening the product packaging height, and reducing production costs.

[0011] Optionally, the radius of the rear wheel is 20 mm greater than the distance between the second axle and the first axle.

[0012] Optionally, the support portion and the main body are arranged at an angle. This arrangement creates an L-shaped bend between the support portion and the main body, resulting in a larger contact area and improved contact stability with the ground on the side of the leveling component on the support portion that is closest to the ground.

[0013] Optionally, the support portion and the main body portion are arranged in the same plane or parallel plane. This arrangement reduces the contact area between the shift plate and the ground, resulting in a relatively smaller contact area between the leveling component and the ground, thereby minimizing wear on the ground.

[0014] Optionally, the main body or support section has an assembly port, which can be closed or open. By providing the assembly port, a firm connection between the leveling component and the shift plate can be ensured.

[0015] Optionally, when the assembly opening is located in the main body or in the support section and the support section and the main body are arranged in the same plane or parallel plane, and the assembly opening is closed, the minimum distance h between the side of the assembly opening closest to the ground and the outermost edge of the support section closest to the ground in an upright state is greater than 2mm. This design not only prevents localized stress concentration caused by unreasonable design during assembly and use, but also avoids damage to the overall strength of the support section, thus ensuring the long-term durability and stability of the support section.

[0016] Optionally, the support portion and the main body portion are arranged at an angle, with the assembly opening located on the support portion. When the assembly opening is closed, the minimum distance h between the periphery of the assembly opening and the outer periphery of the support portion is greater than 2mm. This arrangement not only prevents localized stress concentration caused by unreasonable design during assembly and use, but also avoids damage to the overall strength of the support portion, thus ensuring its long-term durability and stability.

[0017] Optionally, the shift plate also includes fasteners, and the leveling component is connected and fixed to the support via the mounting port and the fasteners. By using fasteners, the leveling component can be firmly fixed to the support, minimizing the possibility of it falling off and reducing unnecessary maintenance and replacement.

[0018] Optionally, the main body or support portion is provided with a positioning element, and the leveling element is provided with a mating element. The mating element engages with the positioning element so that the leveling element is fitted onto the support portion. This configuration allows the leveling element and the support portion to be connected and fixed through a snap-fit ​​mechanism, improving connection stability.

[0019] Optionally, the leveling component has a groove, and the minimum distance between any two opposing surfaces within the leveling component is less than the thickness of the support portion, so that the leveling component fits onto the support portion; or the inner wall of the groove is provided with a clamping element, and the minimum distance between any two opposing surfaces of the leveling component is less than the thickness of the support portion, so that the leveling component fits onto the support portion. With these configurations, the leveling component, by being designed as a U-shaped structure with inward bending on both sides, can be clamped to the support portion after being fitted onto it, without the need for other fixing structures, making it simple and convenient. The clamping element further enhances the connection strength between the leveling component and the support portion.

[0020] Optionally, the first end of the leveling component is fitted onto the support portion, and the second end of the leveling component extends from the support portion to the main body portion. The shift plate also includes fasteners, and one or both ends of the leveling component are connected and fixed to the shift plate through an assembly port and fasteners. This configuration ensures that the end of the leveling component is firmly connected and fixed to the shift plate, guaranteeing a stable connection.

[0021] Optionally, the fastener includes a screw, and the leveling component has a mounting hole corresponding to the mounting opening. The screw passes through the mounting opening and extends into the mounting hole to connect and fix with the leveling component. The screw can achieve a stable connection with the leveling component, thereby improving the stability of the connection between the leveling component and the shift plate.

[0022] Optionally, the leveling component is provided with a protrusion, the end of which is a snap-fit ​​end. The protrusion passes through the assembly opening and snaps into the support component. With the above configuration, the snap-fit ​​end of the protrusion can pass through the assembly opening and snap into the inner side of the support component, thus ensuring a stable connection between the leveling component and the support component.

[0023] Optionally, the two ends of the leveling component have a first locking part and a second locking part, respectively, and at least one of the first locking part and the second locking part locks with the assembly port. This configuration allows both ends of the leveling component to lock with the shift plate, ensuring a stable connection between the leveling component and the shift plate.

[0024] Optionally, the leveling component has a groove to allow it to fit onto the support portion. Both ends of the leveling component have through holes corresponding to the mounting opening. The shift plate also includes fasteners that pass through the two through holes and the mounting opening to connect and fix the leveling component to the support portion. This connection method, using fasteners, through holes, and the mounting opening, ensures the stability of the connection between the leveling component and the support portion.

[0025] Optionally, each end of the leveling component has a snap-fit ​​structure, which engages and secures with the edge of the support portion. This design allows the two ends of the leveling component to engage and limit their position with the support portion, ensuring the stability of the connection between the leveling component and the support portion.

[0026] Optionally, the leveling component has a receiving groove and a through hole, the through hole communicating with the receiving groove. The end of the support portion is adapted to be received within the receiving groove. The support portion has an assembly opening. The shift plate also includes fasteners, which pass through the through hole and the assembly opening to connect and fix to the support portion. The connection method of the fasteners with the through hole and the assembly opening ensures the stability of the connection between the leveling component and the support portion.

[0027] Optionally, the support has a receiving groove and an assembly port, the assembly port is connected to the receiving groove, the opening of the receiving groove is away from the machine body, the leveling component is received in the receiving groove, and the shift plate also includes a fastener, the fastener passes through the assembly port and is connected and fixed to the leveling component.

[0028] Optionally, the shift plate can be made of a rigid material.

[0029] Optionally, the shift plate can be made of metal.

[0030] Optionally, the leveling component can be made of a soft material.

[0031] Optionally, the flexible material is at least one of plastic, silicone, rubber, Teflon, polyurethane foam, polyurethane elastomer, or flexible polyurethane. These materials allow the leveling components to be both flexible and wear-resistant, ensuring a long service life.

[0032] Optionally, the leveling component is a solid structure; or the leveling component is a hollow structure; or the leveling component has a hollow cavity with multiple support columns spaced apart within the cavity. A solid structure ensures full and stable contact between the leveling component and the ground; a hollow structure provides further cushioning, allowing for more flexible contact between the leveling component and the ground, and also reduces manufacturing costs; the support columns, while providing cushioning within the hollow cavity, can more effectively transfer the weight of the aircraft to the ground, ensuring full contact between the aircraft and the ground, and keeping the aircraft stably upright.

[0033] Optionally, the support portion and the main body portion can be detachably connected; or the support portion and the main body portion can be integrally formed. The integral forming design ensures sufficient structural strength for the shift plate, thereby increasing its service life. The detachable connection design allows for replacement or maintenance of the shift plate only by replacing the corresponding support portion or the main body portion, rather than replacing the entire shift plate, facilitating maintenance and reducing maintenance costs.

[0034] Optionally, the leveling component is bonded to the support. Using this method, the leveling component can be directly connected and fixed to the support without the need for other structural parts, which is convenient and quick.

[0035] Optionally, the support portion can be at least one single or combined form of I-shape, J-shape, L-shape, T-shape, I-shape, C-shape, and U-shape. This configuration allows the support portion to adapt to different connection methods.

[0036] Optionally, the side of the leveling component closest to the ground can be a flat surface, a curved surface, a trapezoidal surface, or a pointed edge. This design allows the leveling component to be adapted to different height settings of the machine body adjustment mechanism.

[0037] Optionally, in the upright position, the angle α between the fuselage and the vertical direction is 0° to 20°.

[0038] Optionally, when the machine body is in an upright position, the leveling component makes line contact with the ground at any setting. This setting reduces the contact area between the leveling component and the ground, minimizing scratches and wear.

[0039] Optionally, when the machine body is in an upright position, the leveling component makes surface contact with the ground at any setting. This configuration ensures that the leveling component has a certain contact area with the ground at any setting, guaranteeing stable contact with the ground.

[0040] Optionally, with the help of the height adjustment mechanism, the contact position between the leveling component and the ground changes according to the gear position. Through this setup, the leveling component can provide optimal support to the machine body at any gear position, and in conjunction with the coordinated action of the rear wheel position, ensure the machine body's stability at any gear position.

[0041] Optionally, the support portion is rotatably connected to the main body, and the leveling component is located on the side of the support portion away from the main body. By making the support portion rotatable, the leveling component on the support portion can always maintain surface contact with the ground under gravity, thereby increasing the contact area between the leveling component and the ground and improving the contact stability with the ground.

[0042] According to another aspect of the present invention, a push lawnmower is provided, comprising a body, a body height adjustment mechanism, a shift plate, a front wheel assembly, a rear wheel, and a cutting component. The rear wheel assembly includes a rotating shaft and a pair of rear wheels. The two ends of the rotating shaft are respectively connected to the pair of rear wheels. The rotating shaft is mounted on the body and connected to the body through two mounting points. The straight line connecting the two mounting points constitutes a first axis, and the straight line connecting the centers of the pair of rear wheels constitutes a second axis. The first axis and the second axis are not coaxial. The body height adjustment mechanism includes at least two settings. The body height adjustment mechanism drives the rear wheels to rotate around the first axis. The shifter is used to adjust the height. The shifter is used to fold the grip of the body and keep the body upright when the grip is in the retracted state. The shifter includes a main body and a support. The main body is connected to the body, and the support is used to make direct contact with the ground. The rear wheel is tangent to the ground when the body is upright. When the body height adjustment is in the lowest position, the tangent line of the rear wheel located on the side of the rear wheel away from the front wheel assembly and passing through the preset point W of the support is L1. When the body height adjustment is in the highest position, the tangent line of the rear wheel located on the side of the rear wheel away from the front wheel assembly and passing through the preset point W of the support is L2. The included angle β between the tangent lines L1 and L2 is an acute angle.

[0043] Optionally, in the upright position, the straight line formed by the contact point between the support and the ground and the contact point between the rear wheel and the ground is L. The distance between the intersection of the vertical line of the fuselage's center of gravity and the straight line L and the midpoint of the straight line L is less than or equal to ±150mm. This configuration ensures that the fuselage maintains a good standing position in all positions, eliminating the risk of swaying or tipping in the upright position and guaranteeing high standing stability in all positions.

[0044] The included angle β is less than or equal to 15°. This setting ensures the aircraft has the smallest possible angular deviation across all gear positions, preventing excessive shift in the aircraft's center of gravity and guaranteeing high stability across all gear positions.

[0045] Optionally, the size of the rear wheel is the same as that of the front wheel of the front wheel assembly, and the rotation angle θ of the rear wheel satisfies: 90°≤θ≤270°, and the distance between the second axis and the first axis is greater than or equal to the vertical distance between the lowest cutting plane of the push mower and the highest and lowest settings of the body height adjustment mechanism; or the size of the rear wheel is greater than or equal to the size of the front wheel of the front wheel assembly, and the rotation angle θ of the rear wheel satisfies: 90°<θ<270°, and the distance between the second axis and the first axis is greater than the vertical distance between the lowest cutting plane of the push mower and the highest and lowest settings of the body height adjustment mechanism; wherein, the lowest cutting plane is the cutting plane of the cutting element when cutting at the lowest setting. Through the above settings, when the shift plate and rear wheel support the machine body upright, and when controlling the change in the angle relationship between the rear wheel and the support part between each setting to fluctuate within a small angle range, the rearward shift angle of the center of gravity is smaller, and the angle between the shift plate and the ground when the machine body is laid flat is smaller, making the machine body more compact, shortening the product packaging height, and reducing production costs.

[0046] Optionally, the radius of the rear wheel is 20 mm greater than the distance between the second axle and the first axle.

[0047] The technical solution provided by this invention has the following advantages:

[0048] The present invention provides a push lawnmower, comprising a body, a leveling component, a body height adjustment component, a shift plate, a front wheel assembly, a rear wheel assembly, and a cutting component. The rear wheel assembly includes a rotating shaft and a pair of rear wheels. The two ends of the rotating shaft are respectively connected to the pair of rear wheels. The rotating shaft is mounted on the body and connected to the body via two mounting points. The straight line connecting the two mounting points constitutes a first axis, and the straight line connecting the centers of the rear wheels constitutes a second axis. The first axis and the second axis are not coaxial. The body height adjustment component includes at least two positions. The body height adjustment component drives the rear wheels to rotate around the first axis to achieve height adjustment. The shift plate is used for folding... The folded grip stick keeps the aircraft upright. The shifter includes a main body and a support. The main body is connected to the aircraft, and the support has a leveling component for direct contact with the ground. When the aircraft is upright, the rear wheel is tangent to the ground. When the aircraft height adjustment is at its lowest setting, the tangent line of the rear wheel located on the side furthest from the front wheel assembly and passing through the preset point W of the leveling component is L1. When the aircraft height adjustment is at its highest setting, the tangent line of the rear wheel located on the side furthest from the front wheel assembly and passing through the preset point W of the leveling component is L2. The angle β between tangent lines L1 and L2 is an acute angle. This allows the rear wheel and the shifter to... The shafts are set at different axes, allowing the height adjustment mechanism to rotate the rear wheel for height adjustment. Furthermore, in the lowest and highest gears, the angle β between the tangents L1 and L2 of the rear wheel (located on the side furthest from the front wheel assembly and passing through the preset point W of the leveling component) is acute. This ensures the machine is stored upright on a sufficiently wide and stable base to resist minor vibrations or external impacts. Simultaneously, the angle between the rear wheel and the support is controlled to fluctuate within a small range between gear positions. By optimizing the support structure and geometric parameters, its mechanical performance is improved, better addressing the issue of center of gravity fluctuation caused by structural changes during mechanical movement. This design ensures the equipment can reliably withstand complex external factors, improving overall anti-tipping performance and allowing for safer and more stable vertical storage. Furthermore, by incorporating leveling components on the support structure, these components adapt to different terrains and provide optimal support for the machine. Combined with the coordinated position of the rear wheels, this ensures the machine's stability in any gear position, effectively reducing ground wear from friction and providing additional shock absorption. It also distributes pressure on the support structure, further enhancing the machine's stability and eliminating the risk of swaying or tipping when upright. This solves the problem of poor standing stability in existing lawnmowers. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0050] Figure 1 A bottom-view perspective view of a hand-push lawnmower provided in a specific embodiment of the present invention;

[0051] Figure 2 A schematic diagram of a hand-push lawnmower in an upright position according to a specific embodiment of the present invention;

[0052] Figure 3 for Figure 2 Enlarged view of a portion of the leveling component;

[0053] Figure 4 A schematic diagram of another gear position of a push lawnmower in an upright state, provided in a specific embodiment of the present invention;

[0054] Figure 5 This is a schematic diagram of the connection between the fuselage and the rear wheel assembly according to a specific embodiment of the present invention;

[0055] Figure 6 A schematic diagram of multiple gear positions of a push lawnmower provided in a specific embodiment of the present invention;

[0056] Figure 7 A schematic diagram of the first gear position of a push lawnmower provided in a specific embodiment of the present invention;

[0057] Figure 8 A schematic diagram of the second gear position of a push lawnmower provided in a specific embodiment of the present invention;

[0058] Figure 9 A schematic diagram of the third gear position of a push lawnmower provided in a specific embodiment of the present invention;

[0059] Figure 10 This is a partial enlarged view of the support portion provided in a specific embodiment of the present invention;

[0060] Figure 11 A partial enlarged view of the support portion provided in another specific embodiment of the present invention;

[0061] Figure 12 A partial enlarged view of the support portion provided in another specific embodiment of the present invention;

[0062] Figure 13A partial enlarged view of the support portion provided in another specific embodiment of the present invention;

[0063] Figure 14 A partial enlarged view of the support portion provided in another specific embodiment of the present invention;

[0064] Figure 15 A partial enlarged view of the support portion provided in another specific embodiment of the present invention;

[0065] Figure 16 A partial enlarged view of the support portion provided in another specific embodiment of the present invention;

[0066] Figure 17 This is a schematic diagram of an assembly port provided in a specific embodiment of the present invention.

[0067] Explanation of reference numerals in the attached figures:

[0068] 10-Body; 20-Leveling component; 201-First end; 202-Second end; 21-Groove; 22-Through hole; 23-Protrusion; 24-Clamping block; 25-Clamping component; 30-Shift plate; 31-Main body; 32-Supporting part; 33-Assembly port; 40-Front wheel assembly; 50-Rear wheel assembly; 51-Shaft; 52-Rear wheel; 60-Body height adjustment component; 70-Cutting component. Detailed Implementation

[0069] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0070] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0071] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0072] This invention solves the problem of poor standing stability of existing lawnmowers.

[0073] like Figures 1 to 4 , Figures 6 to 9As shown, the push lawnmower includes a body 10, a leveling component 20, a body height adjustment component 60, a shift plate 30, a front wheel assembly 40, a rear wheel assembly 50, and a cutting component 70. The front wheel assembly 40 and the rear wheel assembly 50 are located on the front and rear sides of the body 10, respectively. It can be understood that the rear side of the body 10 is the operating side, and a handle (not shown) is provided on the rear side of the body 10 for the user to hold and operate the push lawnmower. The shift plate 30 is located on the rear side of the body 10 and is used to fold the handle of the body 10, keeping the body 10 upright when the handle is in the retracted state. When the body 10 is in the upright state, the rear wheel 52 and the shift plate 30 are in contact with the ground to provide support.

[0074] like Figure 5 As shown, the rear wheel assembly 50 includes a rotating shaft 51 and a pair of rear wheels 52. The two ends of the rotating shaft 51 are connected to the pair of rear wheels 52. The rotating shaft 51 is mounted on the fuselage 10, and the rotating shaft 51 is connected to the fuselage 10 through two mounting points. The straight line connecting the two mounting points forms the first axis, and the straight line connecting the centers of the pair of rear wheels 52 forms the second axis. The first axis and the second axis are not coaxial. Specifically, the rotating shaft 51 is similar to a U-shape with two extended sections on both sides. The middle section of the rotating shaft 51 is mounted on the fuselage 10 and serves as the first axis of rotation. The two side sections of the rotating shaft 51 are bent inwards and then outwards, and then connected to the rear wheels 52 respectively. The two side sections of the rotating shaft 51 are coaxially arranged, thus forming the second axis of rotation. In this way, the rear wheels 52 rotate around the first axis.

[0075] like Figures 10 to 16 As shown, the shift plate 30 includes a main body 31 and a support 32. The main body 31 is connected to the fuselage 10, and the support 32 is provided with the aforementioned leveling member 20 for direct contact with the ground. Specifically, the main body 31 extends rearward away from the rear wheel assembly 50, and the support 32 is located at the extended end of the main body 31, thereby forming a triangular / quadrilateral structure with two-point support between the shift plate 30 and the rear wheel assembly 50, ensuring the stability of the fuselage 10 in an upright position.

[0076] In this embodiment, as Figure 2 and Figure 4 ,as well as Figures 5 to 9As shown, the body height adjustment component 60 includes at least two settings, providing the lawnmower with the ability to cut heights adaptable to different terrains and lawn conditions. At different settings, the height of the body 10 from the ground varies, thus meeting the operational needs for different cutting heights. The body height adjustment component 60 drives the rear wheel 52 to rotate around the first axis to achieve height adjustment. Specifically, when the body 10 is in an upright position, the rear wheel 52 is tangent to the ground, and under the action of the body height adjustment component 60, the contact position between the leveling component 20 and the ground changes with the setting. In at least one setting, at least a portion of the leveling component 20 is in contact with the ground. Specifically, as shown... Figure 2 As shown, there is a setting where the leveling component 20 is in surface contact with the ground; as Figure 4 As shown, in one gear position, the leveling component 20 is in line contact with the ground. It can be understood that the leveling component 20 is a plate-shaped or block-shaped structure. The attitude of the fuselage 10 is different in different gear positions, so the angle between the leveling component 20 and the ground is different, and thus the contact situation with the ground is different.

[0077] Specifically, such as Figure 2 and Figure 4 As shown, in the upright position, the angle α between the fuselage 10 and the vertical direction is 0° to 20°. That is to say, in different positions, the attitude range of the fuselage 10 is from vertical to tilted back 20°.

[0078] by Figure 2 For example, when the angle α between the fuselage 10 and the vertical direction is 0°, meaning the angle between the fuselage 10 and the ground is 90°, the side of the shift plate 30 closest to the ground is parallel to the ground. Therefore, the bottom surface of the leveling component 20 on the shift plate 30 contacts the ground, which is a surface contact. This contact method can provide maximum stability in a static state, evenly distribute the weight of the fuselage 10, and reduce local wear and pressure concentration. However, when the angle between the fuselage 10 and the ground is not 90°, the side of the shift plate 30 closest to the ground will not be parallel to the ground. In this case, the edge of the bottom surface of the leveling component 20 on the shift plate 30 contacts the ground, which is a line contact. Due to the height adjustment of the fuselage height adjustment component 60, the distance between the fuselage 10 and the ground increases. With the rear wheel assembly 50 as the fulcrum, the leveling component 20 can provide optimal stability under different usage conditions. Of course, the angle between the body 10 and the ground can also be other angles, that is, when the body height adjustment component 60 is in other positions, the leveling component 20 is in surface contact with the ground, and it is not limited to 90°. You can choose according to actual needs.

[0079] Furthermore, when the machine body 10 is in an upright position, the leveling component 20 makes surface contact with the ground in any setting. Specifically, the support part 32 is not a flat structure, but a curved structure, such as an arc or a polygon. Correspondingly, the leveling component 20 is also arc-shaped or polygonal. In this way, in any setting, the leveling component 20 has a certain area in contact with the ground, ensuring stable contact with the ground. Of course, by adjusting the angle of the arc or polygon of the support part 32, the leveling component 20 can also make line contact with the ground in any setting, thereby reducing the contact area with the ground and minimizing scratches and wear on the ground. This can be selected according to actual needs.

[0080] In this embodiment, as Figures 6 to 9 As shown, when the fuselage height adjustment component 60 is in the lowest position, the tangent line of the rear wheel 52 located on the side of the rear wheel 52 away from the front wheel assembly 40 and passing through the preset point W of the leveling component 20 is L1. When the fuselage height adjustment component 60 is in the highest position, the tangent line of the rear wheel 52 located on the side of the rear wheel 52 away from the front wheel assembly 40 and passing through the preset point W of the leveling component 20 is L2. The included angle β between the tangent line L1 and the tangent line L2 is an acute angle. By adopting the technical solution of this application, the rear wheel 52 and the pivot 51 are set to different axes, so that the body height adjustment component 60 can drive the rear wheel 52 to rotate to achieve height adjustment. In the lowest and highest gears, the included angle β between the tangents L1 and L2 of the rear wheel 52 located on the side of the rear wheel 52 away from the front wheel assembly 40 and passing through the preset point W of the leveling component 20 is an acute angle. This makes the body 10 have a sufficiently wide and stable bottom surface in each gear when stored upright, so as to resist small vibrations or external impacts. At the same time, the angle relationship between the rear wheel 52 and the support part 32 between each gear is controlled to fluctuate within a small angle range. By optimizing the support structure and geometric parameters, its mechanical performance is improved, and the problem of center of gravity fluctuation caused by structural changes during mechanical movement is better solved. This ensures that the equipment can reliably resist even when encountering complex external factors, improves the overall anti-tipping performance, and enables the machine to be stored vertically more safely and stably.

[0081] It is understandable that the tangents L1 and L2 are located on the side of the rear wheel 52 away from the front wheel assembly 40, that is, on the side closer to the leveling component 20, or the side used to contact the ground in an upright position.

[0082] It should be noted that the preset point W of the leveling component 20 can be the center of gravity of the leveling component 20, or a point on the plane of the leveling component 20 near the ground, or any point on the leveling component 20. Its purpose is to serve as a reference point to illustrate the angle change relationship between the tangents L1 and L2, so the specific location does not need to be limited.

[0083] Specifically, in this embodiment, the included angle β is less than or equal to 15°. By using the above parameter range, the fuselage 10 has the smallest possible angular deviation in each gear position, avoiding excessive offset of the fuselage 10's center of gravity and ensuring that the fuselage 10 has high standing stability in each gear position.

[0084] Furthermore, in this embodiment, as Figure 6 As shown, in the upright position, the straight line L formed by the contact point between the leveling component 20 and the ground and the contact point between the rear wheel 52 and the ground is called L. The distance between the intersection of the vertical line of the center of gravity of the fuselage 10 and the straight line L and the midpoint of the straight line L is less than or equal to ±150mm. Through the above settings, the fuselage 10 can maintain a good standing position in all gears, eliminating the risk of swaying or tipping in the upright position, and ensuring high standing stability in all gears. It can be understood that the sign of the distance between the intersection of the vertical line of the center of gravity of the fuselage 10 and the straight line L and the midpoint of the straight line L indicates which side of the midpoint of the straight line L the intersection of the vertical line of the center of gravity of the fuselage 10 is located on. For example, in... Figure 6 In the equation, the intersection of the vertical line containing the center of gravity of fuselage 10 and the straight line L is negative if it is to the left of the midpoint of the straight line L, and positive if it is to the right of the midpoint of the straight line L. The value is 0 when the intersection of the vertical line containing the center of gravity of fuselage 10 and the straight line L coincides with the midpoint of the straight line L.

[0085] In this embodiment, as Figures 7 to 9 As shown, the rotation angle θ of the rear wheel 52 ranges from 90° to 270°. It can be understood that the rotation angle θ of the rear wheel 52 is the angle at which the rear wheel 52 rotates clockwise with a reference of 0° to the horizontal line extending from the first axle towards the front wheel assembly 40 on the left. This configuration allows for a wider range of adjustment for the fuselage height adjustment mechanism 60, thus adapting to various application scenarios and terrains.

[0086] In this embodiment, when the size of the rear wheel 52 is the same as the size of the front wheel of the front wheel assembly 40, the rotation angle θ of the rear wheel 52 satisfies: 90°≤θ≤270°. The distance between the second axis and the first axis is greater than or equal to the vertical distance between the lowest cutting plane of the push mower and the highest and lowest settings of the body height adjustment component 60. When the size of the rear wheel 52 is greater than or equal to the size of the front wheel of the front wheel assembly 40, the rotation angle θ of the rear wheel 52 satisfies: 90°<θ<270°. The distance between the second axis and the first axis is greater than the vertical distance between the lowest cutting plane of the push mower and the highest and lowest settings of the body height adjustment component 60. The lowest cutting plane is the cutting plane of the cutting element 70 when cutting at the lowest setting. Understandably, when the size of the rear wheel 52 is the same as the size of the front wheel of the front wheel assembly 40, and the distance between the second axle and the first axle is greater than or equal to the vertical distance between the lowest cutting plane of the push lawnmower and the highest and lowest settings of the body height adjustment component 60, and the rotation angle θ of the rear wheel 52 is 90°, the lowest cutting plane is at its lowest setting from the ground, which is also the lowest setting of the body height adjustment component 60. Figure 7 As shown; when the rotation angle θ of the rear wheel 52 is 270°, the lowest cutting plane is at its highest position above the ground, which is also the highest position of the fuselage height adjustment component 60, as shown. Figure 9 As shown.

[0087] When the size of the rear wheel 52 is greater than the size of the front wheel of the front wheel assembly 40, or when the size of the rear wheel 52 is equal to the size of the front wheel of the front wheel assembly 40, and the distance between the second axle and the first axle is greater than the vertical distance between the lowest cutting plane of the push mower and the highest and lowest settings of the body height adjustment component 60, when the rotation angle θ of the rear wheel 52 is close to 90°, the lowest cutting plane is at the lowest setting from the ground, which is also the lowest setting of the body height adjustment component 60; when the rotation angle θ of the rear wheel 52 is close to 270°, the lowest cutting plane is at the highest setting from the ground, which is also the highest setting of the body height adjustment component 60.

[0088] With the above settings, when the shift plate 30 and rear wheel 52 support the machine body 10 upright, and the angle between the rear wheel 52 and the support part 32 fluctuates within a small angle range between each gear position, the rearward shift of the center of gravity is smaller, and the angle between the shift plate 30 and the ground is smaller when the machine body 10 is laid flat. This makes the machine body 10 more compact, shortens the product packaging height, and reduces production costs. Furthermore, in this embodiment, the radius of the rear wheel 52 is greater than the distance of 20mm between the second axle center and the first axle center. In other words, the distance between the first axle center and the outer periphery of the rear wheel 52 is 20mm.

[0089] In this embodiment, the hardness of the leveling component 20 is less than the hardness of the support portion 32. That is to say, the leveling component 20 is made of a flexible material. By setting the leveling component 20 and selecting a flexible material for it, the leveling component 20 can adapt to different terrains and provide optimal support for the body 10. In conjunction with the coordinated position of the rear wheel assembly 50, it ensures the stability of the body 10 in any gear position, effectively reduces ground wear caused by friction, and provides additional shock absorption, dispersing the pressure of the support part 32, further enhancing the stability of the body 10 and eliminating the risk of shaking or tipping of the body 10 in the storage state. In addition, the leveling component 20 can better adapt to small irregular surfaces, thereby improving the fit of the device with uneven ground during overall installation, preventing imbalance when the shift plate 30 and rear wheel 52 are in contact with the ground, and the leveling component 20 can absorb some force when subjected to lateral force or non-uniform external disturbances, thereby reducing imbalance when the shift plate 30 and rear wheel 52 are in contact with the ground, and preventing the shift plate 30 from scraping and wearing the ground when shaking.

[0090] In this embodiment, the shift plate 30 is made of a rigid material. Alternatively, the shift plate 30 may be made of a metallic material, such as an iron plate, alloy plate, or stainless steel plate.

[0091] In this embodiment, the leveling component 20 is made of a soft material. Furthermore, since there is friction between the leveling component 20 and the ground, it must be flexible yet also wear-resistant to ensure its service life. Specifically, the soft material is at least one of plastic, silicone, rubber, Teflon, polyurethane foam, polyurethane elastomer, or flexible polyurethane.

[0092] In this embodiment, there are one or two shift plates 30, which are located at one or both ends of the rear side of the body 10, so that the body 10 can be stably kept upright in an upright state. Correspondingly, there are also two leveling parts 20.

[0093] In this embodiment, to ensure sufficient and stable contact between the leveling component 20 and the ground, the leveling component 20 is a solid structure. Of course, the leveling component 20 can also be a hollow structure. That is, the leveling component 20 has a hollow cavity filled with air. Through this arrangement, the hollow cavity provides further cushioning, allowing for more flexible contact between the leveling component 20 and the ground, and also reduces the manufacturing cost of the leveling component 20. Furthermore, multiple support columns can be spaced apart within the hollow cavity. This way, while the hollow cavity provides cushioning, the support columns can more effectively transfer the weight of the fuselage 10 to the ground, ensuring full contact between the fuselage 10 and the ground, and keeping the fuselage 10 stably upright.

[0094] In this embodiment, the support portion 32 and the main body portion 31 are integrally formed. This design ensures that the shift plate 30 has sufficient structural strength, thereby improving its service life.

[0095] In an optional embodiment, the support portion 32 is detachably connected to the main body portion 31. With the above configuration, when the maintenance shift plate 30 needs to be replaced, only the corresponding support portion 32 or the main body portion 31 needs to be replaced, without having to replace the entire shift plate 30, which facilitates the operation of maintenance personnel and reduces maintenance costs.

[0096] In an optional embodiment, the support portion 32 is rotatably connected to the main body portion 31, and the leveling member 20 is located on the side of the support portion 32 away from the main body portion 31. Specifically, the main body portion 31 and the support portion 32 have rotation holes at their respective ends close to each other, and the rotating shafts pass through the upper rotation holes of the two components to allow the support portion 32 to rotate relative to the main body portion 31. By making the support portion 32 rotatable, the leveling member 20 on the support portion 32 can always face towards the ground and maintain surface contact with the ground under gravity, thereby increasing the contact area between the leveling member 20 and the ground and improving the contact stability with the ground.

[0097] In this embodiment, a positioning member is provided on the main body 31 or the support 32, and a mating member is provided on the leveling member 20. The mating member engages with the positioning member so that the leveling member 20 is fitted onto the support 32. Specifically, the positioning member can be a protrusion and the mating member can be a recess, or the positioning member can be a recess and the mating member can be a protrusion. This interlocking action secures the leveling member 20 to the support 32, facilitating installation and disassembly while maintaining good connection stability during use.

[0098] In this embodiment, when the leveling component 20 is not provided on the shift plate 30, the contact area between the support portion 32 and the ground is the support surface. After the leveling component 20 is provided on the shift plate 30, the area relationship between the leveling component 20 and the support surface can be greater than or equal to or less than the area of ​​the support surface. Specifically, when the area of ​​the leveling component 20 is less than that of the support surface, the leveling component 20 is located in the middle position of the support portion 32 to ensure contact stability. Of course, the leveling component 20 can also be adapted to the support surface, that is, the area is equal, so as to make more sufficient contact with the ground; furthermore, the area of ​​the leveling component 20 can also be greater than that of the support surface, that is, the edge of the leveling component 20 extends beyond the edge of the support surface, which can further improve the contact stability with the ground. The above methods can be selected according to actual needs.

[0099] In an optional embodiment, the push lawnmower may not include the leveling component 20. Specifically, the push lawnmower includes a body 10, a body height adjustment component 60, a shift plate 30, a front wheel assembly 40, a rear wheel assembly 50, and a cutting component 70. The rear wheel assembly 50 includes a pivot 51 and a pair of rear wheels 52. The two ends of the pivot 51 are respectively connected to the pair of rear wheels 52. The pivot 51 is mounted on the body 10 and is connected to the body 10 through two mounting points. The straight line connecting the two mounting points forms a first axis, and the straight line connecting the centers of the pair of rear wheels 52 forms a second axis. The first axis and the second axis are not coaxial. The body height adjustment component 60 includes at least two positions. The body height adjustment component 60 drives the rear wheels 52 to rotate around the first axis to achieve height adjustment. The shift plate 30 is used to fold the handle of the body 10 and to keep the handle in a stowed state. The lowering mechanism keeps the fuselage 10 upright. The shift plate 30 includes a main body 31 and a support 32. The main body 31 is connected to the fuselage 10, and the support 32 is used to directly contact the ground. The rear wheel 52 is tangent to the ground when the fuselage 10 is upright. When the fuselage height adjustment component 60 is in the lowest position, the tangent line of the rear wheel 52 located on the side of the rear wheel 52 away from the front wheel assembly 40 and passing through the preset point W of the support 32 is L1. When the fuselage height adjustment component 60 is in the highest position, the tangent line of the rear wheel 52 located on the side of the rear wheel 52 away from the front wheel assembly 40 and passing through the preset point W of the support 32 is L2. The included angle β between the tangent lines L1 and L2 is an acute angle.

[0100] Furthermore, excluding the leveling component 20, the straight line formed by the contact point between the support part 32 and the ground and the contact point between the rear wheel 52 and the ground is L. The distance between the intersection of the vertical line where the center of gravity of the fuselage 10 is located and the straight line L and the midpoint of the straight line L is less than or equal to ±150mm.

[0101] The specific structure of the shift plate 30 and the leveling component 20 will be described below.

[0102] Example 1

[0103] In this embodiment, the support portion 32 and the main body portion 31 are arranged at an angle. That is, the support portion 32 and the main body portion 31 are arranged in an L-shape. This makes the side of the leveling member 20 provided on the support portion 32 closer to the ground a large surface area, thereby having a larger contact area and improving the contact stability with the ground.

[0104] Specifically, the support portion 32 and the main body portion 31 form a 90° angle, with the main body portion 31 vertically positioned and the support portion 32 bent inwards. This arrangement allows the leveling component 20 mounted on the support portion 32 to have the largest possible contact area with the ground, and the inward bend saves space, preventing the support portion 32 from exceeding the width of the fuselage 10. Of course, the angle between the support portion 32 and the main body portion 31 can also be other, and the support portion 32 can also be bent outwards, depending on actual needs.

[0105] like Figure 10 As shown, the leveling component 20 has snap-fit ​​structures at both ends, which are engaged and fixed to the edge of the support portion 32. Specifically, the leveling component 20 has a groove 21 for... Figure 10 Specifically, locking blocks 24 are provided on the upper and lower inner walls of the groove 21, with a gap between the locking blocks 24 and the bottom of the groove 21. The support part 32 is accommodated in the space between the locking blocks 24 and the bottom of the groove 21, and is limited by the locking blocks 24 through engagement with the upper and lower edges of the support part 32. Furthermore, the end of the support part 32 away from the main body 31 has a limiting section, which is L-shaped and bent to limit and stop the leveling member 20, preventing the leveling member 20 from detaching from one end of the support part 32.

[0106] In one alternative embodiment, similar to Figure 10 In the setting, the leveling part 20 has a groove 21, and the groove 21 is along... Figure 10 Extending horizontally within the leveling member 20, the minimum distance between any two opposing surfaces is less than the thickness of the support portion 32, so that the leveling member 20 fits onto the support portion 32. It should be noted that... Figure 10 In this embodiment, the thickness of the support portion 32 is its vertical dimension. The leveling component 20, by being configured as a U-shaped structure with inward bending on both sides, can be clamped to the support portion 32 after being fitted onto it, requiring no other fixing structure, making it simple and convenient. Furthermore, a clamping component can be provided on the inner wall of the groove 21 to allow the leveling component 20 to fit onto the support portion 32. By providing the clamping component, the connection strength between the leveling component 20 and the support portion 32 can be further improved.

[0107] Furthermore, such as Figure 3 , Figures 11 to 16 As shown, in order to ensure a firm connection between the leveling component 20 and the shift plate 30, an assembly opening 33 is provided on the main body 31 or the support part 32. The assembly opening 33 is a closed opening.

[0108] Furthermore, the shift plate 30 also includes fasteners, and the leveling component 20 is connected and fixed to the support portion 32 through the mounting port 33 and the fasteners. By setting the fasteners and mounting port for connection and assembly, the leveling component 20 can be firmly fixed to the support portion 32, minimizing the possibility of the leveling component 20 falling off and reducing unnecessary maintenance and replacement.

[0109] In this embodiment, the fastener includes a screw. The leveling component 20 has a mounting hole corresponding to the mounting opening 33. The screw passes through the mounting opening 33 and extends into the mounting hole to connect and fix with the leveling component 20. Specifically, the mounting hole can be a threaded hole so that the screw is threadedly connected to the leveling component 20. Of course, the fastener can also be other types of structures such as rivets, which can be selected according to actual needs.

[0110] In one alternative embodiment, such as Figure 17 As shown, assembly port 33 is an opening. It can be understood that a closed opening is an opening that is not connected to the edge of the component where assembly port 33 is located and is therefore closed, while an open opening is an opening that is connected to the edge of the component where assembly port 33 is located.

[0111] In this embodiment, as Figure 12 As shown, when the assembly port 33 is located in the support portion 32, the minimum distance h between the periphery of the assembly port 33 and the outer periphery of the support portion 32 is greater than 2mm. This design ensures that the assembly port 33 does not affect the structural strength of the support portion 32 itself, thus guaranteeing the service life of the support portion 32.

[0112] In one alternative embodiment, such as Figure 12 As shown, the first end 201 of the leveling component 20 is fitted onto the support portion 32, and the second end 202 of the leveling component 20 extends from the support portion 32 to the main body portion 31. The second end 202 of the leveling component 20 is connected and fixed to the shift plate 30 through the mounting port 33 and fasteners. Specifically, the first end of the leveling component 20 and the support portion 32 is the end away from the main body portion 31, and the mounting port 33 is provided on the support portion 32 and located near the second end of the support portion 32. The leveling component 20 is L-shaped, and the first end 201 of the leveling component 20 has a sleeve interface adapted to the support portion 32, so that the extended end of the support portion 32 passes through the first end 201 of the leveling component 20. The second end 202 of the leveling component 20 is flush with or extends beyond the bending surfaces of the main body portion 31 and the support portion 32, and is then connected and fixed by fasteners passing through the mounting port 33 to the leveling component 20.

[0113] In one alternative embodiment, such as Figure 11As shown, the assembly port 33 is provided on the main body 31. The leveling member 20 is U-shaped. The first end 201 of the leveling member 20 has a sleeve interface adapted to the support part 32, so that the extension end of the support part 32 passes through the first end of the leveling member 20. The second end 202 of the leveling member 20 is attached to the main body 31. Then, the connection and fixation are achieved by fasteners passing through the assembly port 33 and connecting with the leveling member 20. In this embodiment, the second end 202 of the leveling member 20 also has a through hole 22, so that the fasteners pass through the assembly port 33 and the through hole 22 in sequence to achieve the connection and fixation between the leveling member 20 and the main body 31.

[0114] In one alternative embodiment, distinct from Figure 11 In the structure, the first end of the support part 32 has a limiting section, which is bent in an L shape. The first end of the support part 32 is also provided with an assembly port 33. The first end of the leveling part 20 is also provided with a through hole 22. There are two fasteners, which pass through the two through holes 22 and the assembly port 33 respectively, so that the leveling part 20 is connected and fixed to the support part 32.

[0115] It should be noted that there can be multiple assembly ports 33 and through holes 22 in the same position to improve the connection strength.

[0116] In one alternative embodiment, such as Figure 14 As shown, the leveling component 20 is provided with a protrusion 23, the end of which is a snap-fit ​​end. The protrusion 23 passes through the assembly port 33 and snaps into the support component 32. Specifically, the assembly port 33 is provided on the support component 32, and the protrusion is located on the side of the leveling component 20 near the support component 32, corresponding to the assembly port 33. The snap-fit ​​end of the protrusion 23 passes through the assembly port 33 and snaps into the support component 32 for a stop. Furthermore, there can be one or more protrusions 23. When there is only one protrusion 23, it is located in the middle position of the leveling component 20. When there are multiple protrusions 23, there are also multiple assembly ports 33. The multiple protrusions 23 are evenly spaced on the leveling component 20 to improve the connection firmness.

[0117] In one optional embodiment, the support portion 32 has a receiving groove and a mounting opening 33. The mounting opening 33 communicates with the receiving groove, and the opening of the receiving groove is away from the body 10. The leveling member 20 is received in the receiving groove, and fasteners pass through the mounting opening 33 and are connected and fixed to the leveling member 20. Specifically, the support portion 32 has a U-shaped structure, thereby forming a receiving groove. The size of the leveling member 20 is adapted to the receiving groove, so that it is precisely received in the receiving groove, and then it is connected and fixed to the support portion 32 by fasteners. Of course, the support portion 32 may also have a mounting opening 33, the leveling member 20 may have a receiving groove, and the support portion 32 may have a snap-fit ​​protrusion adapted to the receiving groove. The snap-fit ​​protrusion is adapted to be received in the receiving groove, and then the support portion 32 and the leveling member 20 are connected and fixed by fasteners.

[0118] In an optional embodiment, the leveling member 20 has a first locking portion and a second locking portion at both ends, and at least one of the first locking portion and the second locking portion locks with the assembly port 33. Specifically, the main body 31 is provided with an assembly port 33, and the first locking portion located at the second end of the leveling member 20 locks with the assembly port 33 on the main body 31. Furthermore, the first end of the support portion 32 may also be provided with an assembly port 33, so that the first locking portion locks with the assembly port 33 on the support portion 32, thereby further improving the connection strength between the leveling member 20 and the support portion 32.

[0119] Furthermore, in addition to the connection method using the assembly port 33 and fasteners, the leveling component 20 can also be bonded to the support portion 32. In this way, the leveling component 20 can be directly connected and fixed to the support portion 32 without the need for other structural components, which is convenient and quick.

[0120] In this embodiment, the support part 32 can be adapted to different connection methods, and can be at least one single form or combination form among I-shaped, J-shaped, L-shaped, T-shaped, I-shaped, C-shaped and U-shaped, which can be selected according to actual needs.

[0121] In this embodiment, the side of the leveling component 20 closest to the ground is a flat surface, an arc surface, a trapezoidal surface, or a sharp edge structure.

[0122] Example 2

[0123] In this embodiment, the difference from that in Embodiment 1 lies in the different structural forms of the main body 31 and the support 32.

[0124] Specifically, in this embodiment, the support portion 32 and the main body portion 31 are arranged in the same plane or parallel plane. That is, both the support portion 32 and the main body portion 31 are vertically arranged. By adopting the above arrangement, the contact area between the shift plate 30 and the ground can be reduced, and the contact area between the leveling component 20 and the ground can also be relatively small, thereby minimizing wear on the ground.

[0125] In this embodiment, as Figure 3 As shown, when the assembly opening 33 is closed, the minimum distance h between the side of the assembly opening 33 closest to the ground and the outermost edge of the support 32 closest to the ground in an upright state is greater than 2mm. Specifically, the edge of the support 32 is not a regular straight line, but a curve or arc with continuous bending segments. Therefore, the distance between the assembly opening 33 and the outermost edge of the support 32 varies at different locations. This design ensures that the assembly opening 33 does not affect the structural strength of the support 32 itself, thus guaranteeing the service life of the support 32.

[0126] like Figure 15 As shown, the leveling component 20 has a groove 21, and the groove 21 is along... Figure 15Extending vertically within the leveling member 20, the minimum distance between any two opposing surfaces is less than the thickness of the support portion 32, so that the leveling member 20 is fitted onto the support portion 32. Figure 15 In this embodiment, the thickness of the support portion 32 is a horizontal dimension. The leveling component 20 is configured as a U-shaped structure with both sides bent inward, so that it can be clamped to the support portion 32 after being sleeved on, without the need for other fixing structures, which is simple and convenient.

[0127] Furthermore, such as Figure 16 As shown, a clamping member 25 can also be provided on the inner wall of the groove 21 so that the leveling member 20 is fitted onto the support part 32. By providing the clamping member 25, the connection between the leveling member 20 and the support part 32 can be further strengthened.

[0128] In one alternative embodiment, such as Figure 15 As shown, the leveling part 20 has a groove 21 so that the leveling part 20 is fitted onto the support part 32. The two ends of the leveling part 20 are respectively provided with through holes 22 corresponding to the assembly opening 33. Fasteners pass through the two through holes 22 and the assembly opening 33 so that the leveling part 20 is connected and fixed to the support part 32.

[0129] In an optional embodiment, the first end of the leveling component 20 is sleeved on the support portion 32, and the second end of the leveling component 20 extends from the support portion 32 to the main body portion 31. One or both ends of the leveling component 20 are connected and fixed to the main body portion 31 through the mounting port 33 and fasteners. Specifically, the first end of the leveling component 20 and the support portion 32 is the end away from the main body portion 31, and the mounting port 33 is provided on the support portion 32 or the main body portion 31, depending on the length of the leveling component 20. The leveling component 20 is L-shaped, and the first end of the leveling component 20 has a sleeve interface adapted to the support portion 32, so that the extended end of the support portion 32 passes through the first end of the leveling component 20. Then, the second end of the leveling component 20 is connected and fixed to the support portion 32 or the main body portion 31 through the mounting port 33 by fasteners.

[0130] In an optional embodiment, the leveling component 20 is provided with a protrusion, the end of which is a snap-fit ​​end. The protrusion passes through the assembly port 33 and snaps into the support component 32. Specifically, the assembly port 33 is provided on the support component 32 or the main body 31. The protrusion is located on the side of the leveling component 20 near the shift plate 30, corresponding to the assembly port 33. The snap-fit ​​end of the protrusion passes through the assembly port 33 and snaps into the shift plate 30 for a stop. Further, there can be one or more protrusions. When there is only one protrusion, it is located in the middle of the leveling component 20. When there are multiple protrusions, there are also multiple assembly ports 33. The multiple protrusions are evenly spaced on the leveling component 20 to improve the connection firmness.

[0131] In one optional embodiment, the leveling component 20 has a receiving groove and a through hole 22, the through hole 22 communicating with the receiving groove. The end of the support portion 32 is adapted to be received in the receiving groove. The support portion 32 has an assembly opening 33. The shift plate 30 also includes a fastener, which passes through the through hole 22 and the assembly opening 33 and is connected and fixed to the support portion 32. Specifically, the leveling component 20 has a U-shaped structure, thereby forming a receiving groove. The size of the end of the support portion 32 is adapted to the receiving groove, so that it is precisely received in the receiving groove, and then connected and fixed to the leveling component 20 by the fastener. Of course, it is also possible that the end of the support portion 32 has a U-shaped structure, thereby forming a receiving groove, the opening of the receiving groove being away from the body 10, the leveling component 20 being received in the receiving groove, and the fastener passing through the assembly opening 33 and connected and fixed to the leveling component 20.

[0132] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: The push lawnmower includes a body 10, a leveling component 20, a body height adjustment component 60, a shift plate 30, a front wheel assembly 40, a rear wheel assembly 50, and a cutting component 70. The rear wheel assembly 50 includes a rotating shaft 51 and a pair of rear wheels 52. The two ends of the rotating shaft 51 are respectively connected to the pair of rear wheels 52. The rotating shaft 51 is mounted on the body 10. The rotating shaft 51 and the body 10 are connected through two assembly points. The straight line connecting the two assembly points constitutes the first axis, and the straight line connecting the centers of the rear wheels 52 constitutes the second axis. The first axis and the second axis are different. The shaft and the body height adjustment component 60 include at least two positions. The body height adjustment component 60 drives the rear wheel 52 to rotate around the first shaft center to achieve height adjustment. The shift plate 30 is used to fold the handle of the body 10 and keep the body 10 upright when the handle is in the retracted state. The shift plate 30 includes a main body 31 and a support part 32. The main body 31 is connected to the body 10, and the support part 32 is provided with a leveling component 20 for direct contact with the ground. The rear wheel assembly 50 is tangent to the ground when the body 10 is upright. In each position of the body height adjustment component 60, the angle between each straight line L formed by the contact point between the leveling component 20 and the ground and the contact point between the rear wheel 52 and the ground is... β is an acute angle. By setting the axes of the rear wheel 52 and the rotating shaft 51 to different axes, the body height adjustment component 60 can drive the rear wheel 52 to rotate to achieve height adjustment. Furthermore, the angle β between the straight lines L formed by the contact points of the leveling component 20 and the ground and the contact points of the rear wheel 52 and the ground in each gear position is an acute angle. This ensures that when the body 10 is stored upright, it has a sufficiently wide and stable surface in each gear position to resist minor vibrations or external impacts. Simultaneously, it controls the angular relationship between the rear wheel 52 and the support 32 between each gear position to fluctuate within a small angle range. By optimizing the support structure and geometric parameters, its mechanical performance is improved, better addressing the issues arising during mechanical movement. The structural changes cause center of gravity fluctuations, ensuring that the equipment can reliably withstand complex external factors, improving overall anti-tipping performance, and enabling the machine to be stored more safely and stably vertically. In addition, by setting a leveling component 20 on the support 32, the leveling component 20 can adapt to different terrains and provide optimal support for the body 10. In conjunction with the coordinated role of the rear wheel assembly 50, it ensures the standing stability of the body 10 in any gear, effectively reduces ground wear caused by friction, and provides additional shock absorption, dispersing the pressure on the support 32, further enhancing the stability of the body 10, and eliminating the risk of shaking or tipping of the body 10 in the storage state.

[0133] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. Based on the embodiments of the present invention, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the scope of protection of the present invention.

Claims

1. A push lawnmower, characterized in that, include: Fuselage (10); A front wheel assembly (40) is mounted on the front end of the fuselage (10); A rear wheel assembly (50) is mounted at the rear end of the fuselage (10), the rear wheel assembly (50) including a pair of rear wheels (52); A fuselage height adjustment component (60) is used to adjust the height of the fuselage (10) relative to the ground; as well as A leveling component (20) is used to directly contact the ground. The leveling component (20) is connected to the body (10). When the body (10) is in an upright state, the contact point between the leveling component (20) and the ground and the contact point between the rear wheel (52) and the ground form a straight line L. The distance between the intersection of the vertical line where the center of gravity of the body (10) is located and the straight line L and the midpoint of the straight line L is less than or equal to ±150mm.

2. The hand-push lawnmower according to claim 1, characterized in that, The fuselage height adjustment component (60) includes at least two positions, and the contact position between the leveling component (20) and the ground is configured to change with the change of the position.

3. The hand-push lawnmower according to claim 1, characterized in that, When the machine body (10) is in the upright state, the leveling component (20) is in surface contact with the ground in any of the gear positions.

4. The hand-push lawnmower according to claim 1, characterized in that, The fuselage height adjustment component (60) is configured to include a highest setting that moves the fuselage (10) furthest from the ground and a lowest setting that moves the fuselage (10) closest to the ground. When the fuselage height adjustment component (60) is in the lowest setting, the tangent line L1 is the tangent line of the rear wheel (52) located on the side of the rear wheel (52) away from the front wheel assembly (40) and passing through the preset point W of the leveling component (20). When the fuselage height adjustment component (60) is in the highest setting, the tangent line L2 is the tangent line of the rear wheel (52) located on the side of the rear wheel (52) away from the front wheel assembly (40) and passing through the preset point W of the leveling component (20). The included angle β between the tangent line L1 and the tangent line L2 is an acute angle.

5. The hand-push lawnmower according to claim 4, characterized in that, The included angle β is less than or equal to 15°.

6. The hand-push lawnmower according to claim 1, characterized in that, It also includes a shift plate (30) and fasteners, the fasteners being configured to connect the leveling component (20) to the shift plate (30) through the assembly port (33).

7. The hand-push lawnmower according to claim 1, characterized in that, It also includes a shift plate (30), which includes a support portion (32), and the leveling component (20) is bonded to the support portion (32).

8. The hand-push lawnmower according to claim 1, characterized in that, The rear wheel assembly (50) also includes a pivot (51), the two ends of which are respectively connected to a pair of rear wheels (52). The pivot (51) is mounted on the fuselage (10). The pivot (51) and the fuselage (10) are connected by two assembly points. The straight line connecting the two assembly points forms a first axis, and the straight line connecting the centers of the paired rear wheels (52) forms a second axis. The radius of the rear wheel (52) is greater than the distance between the second axis and the first axis by 20 mm.

9. The hand-push lawnmower according to claim 1, characterized in that, It also includes a cutting component (70) which is disposed on the machine body. The rear wheel assembly (50) also includes a rotating shaft (51) which is connected to a pair of rear wheels (52) at both ends. The rotating shaft (51) is mounted on the machine body (10). The rotating shaft (51) and the machine body (10) are connected by two assembly points. The straight line connecting the two assembly points forms the first axis, and the straight line connecting the centers of the pair of rear wheels (52) forms the second axis. The size of the rear wheel (52) is greater than or equal to the size of the front wheel of the front wheel assembly (40), and the rotation angle θ of the rear wheel (52) satisfies: 90° < θ < 270°, and the distance between the second axle center and the first axle center is greater than the vertical distance between the highest grade cutting plane and the lowest grade cutting plane.

10. The hand-push lawnmower according to claim 1, characterized in that, In the upright position, the angle α between the fuselage (10) and the vertical direction is 0° to 20°.

Images