Hand-push mower

Abstract

The invention discloses a hand-push mower which comprises a mower body, a leveling piece, a mower body heightening piece, a gear shifting plate, a front wheel assembly, a rear wheel assembly and a cutting piece, the rear wheel assembly comprises a rotating shaft and rear wheels arranged in pairs, the two ends of the rotating shaft are connected with the rear wheels, the rotating shaft is connected with the mower body through two assembly points, and the connecting line between the two assembly points forms a first axis; the gear shifting plate comprises a main body part and a supporting part, the main body part is connected with the machine body, a leveling part is arranged on the supporting part and used for making direct contact with the ground, and the leveling part is used for making direct contact with the ground. The rear wheels are tangent to the ground when the machine body is in the upright state, and the included angle beta between straight lines L formed by the contact point of the leveling piece and the ground and the contact point of the rear wheels and the ground is an acute angle under the gears of the machine body heightening piece, and the problem that in the prior art, a mower is poor in standing stability is solved.

Description

Technical Field

[0001] The invention belongs to the technical field related to lawn mowers, and in particular relates to a hand-push lawn mower. Background Art

[0002] In the prior art, the mower folds the handle through the shift plate to minimize the space of the machine body, and the support structure of the shift plate keeps the machine body upright, so that the machine body occupies a smaller area and is easy to store. This design makes it easier to store the mower in an environment with limited space, such as a garage or tool room. However, with the use of the machine body height adjustment part, the user can flexibly adjust the height of the mower to suit different lawn conditions and personal preferences, but this also leads to several potential problems:

[0003] When the height adjustment part of the lawn mower is adjusted, the center of gravity of the entire device may rise. This change in height will make it easier for the lawn mower to lose its balance center of gravity when stored vertically or nearly vertically, and there may be lateral forces or non-uniform external interference in its storage area, which increases the probability of displacement and eventual tipping of the upright stored body after the height adjustment. At the same time, after the body is upright, due to the various ground conditions, it is sometimes not flat, and the flatness of the contact position between the shift plate and the ground is often different, resulting in a small actual contact area between the shift plate and the ground. Its contact points may not be fully solid, weakening the overall support capacity of the machine. When the height adjustment part of the body is adjusted, the center of gravity of the entire device may rise, and when there are protrusions or depressions on the ground with irregular distribution, this effect is further aggravated. In addition, during the production, assembly, and use of the lawn mower, the shift plate may have asymmetry on both sides of the shift plate due to manufacturing and assembly errors, or vibration loosening assembly errors caused by failure to maintain the shift plate in time after use. This error will cause the shift plate and rear wheels to lose balance when they come into contact with the ground. The imbalance is manifested as the shaking of the fuselage. After the height adjustment, the imbalance becomes more obvious as the center of gravity changes. This instability increases the risk of tilting or overturning. In addition, this instability further creates the possibility of scratching and wearing the ground.

[0004] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Summary of the invention

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

[0006] To solve the above technical problems, according to one aspect of the present invention, a push lawn mower is provided, comprising a body, a leveling member, a body height adjustment member, a shift plate, a front wheel assembly, a rear wheel assembly and a cutting member, wherein the rear wheel assembly comprises a rotating shaft and rear wheels arranged in pairs, wherein both ends of the rotating shaft are respectively connected to the paired rear wheels, the rotating shaft is assembled on the body, and the rotating shaft and the body are connected through two assembly points, wherein the straight line where the connection line between the two assembly points lies constitutes a first axis, the straight line where the connection line between the centers of the paired rear wheels lies constitutes a second axis, and the first axis is not coaxial with the second axis, the body height adjustment member comprises at least two gears, and the body height adjustment member drives the rear wheels to rotate with the first axis as the center. The center of the circle rotates to achieve height adjustment, the shift plate is used to fold the grip of the fuselage and keep the fuselage upright when the grip is in the storage state, the shift plate includes a main body and a support portion, the main body is connected to the fuselage, and a leveling member is provided on the support portion for direct contact with the ground, the rear wheel is tangent to the ground when the fuselage is in the upright state, when the fuselage height adjustment member is in the lowest gear, the tangent of the rear wheel located on the side away from the front wheel assembly and passing through the preset point W of the leveling member is L1, when the fuselage height adjustment member is in the highest gear, the tangent of the rear wheel located on the side away from the front wheel assembly and passing through the preset point W of the leveling member is L2, and the angle β between the tangent L1 and the tangent L2 is an acute angle. By setting the axis of the rear wheel and the rotating shaft to be coaxial, the fuselage height adjustment member can drive the rear wheel to rotate to achieve height adjustment, and the angle β between the tangent lines L1 and L2 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 member at the lowest and highest gears is an acute angle, so that when the fuselage is stored upright, it has a sufficiently wide and stable low surface at each gear position to resist small vibrations or external impacts, and at the same time, the angle relationship between the rear wheel and the support part between each gear position is controlled to float within a small angle range, and the mechanical performance is improved by optimizing the support structure and geometric parameters, so as to better solve the problem of mechanical movement. In the process, the center of gravity fluctuation problem caused by structural changes is solved to ensure that the equipment can reliably resist even if it encounters complex external factors, improve the overall anti-dumping performance, and enable the machine to be stored vertically more safely and stably. In addition, by arranging leveling parts on the support part, the leveling parts can adapt to different terrains and provide the best support for the fuselage, and cooperate with the rear wheel position to ensure the standing stability of the fuselage in any gear. At the same time, it can effectively reduce the ground wear caused by friction, and also provide additional shock absorption effect, disperse the pressure of the support part, further enhance the stability of the fuselage, and eliminate the hidden dangers of shaking or overturning of the fuselage in the upright state.

[0007] Optionally, in at least one gear position, at least a portion of the leveling member is in contact with the ground, wherein the hardness of the leveling member is less than the hardness of the support portion. Through the above arrangement, the leveling member can better adapt to tiny irregular surfaces, thereby improving the fit of the device as a whole to the uneven ground when installed, reducing the imbalance of the shift plate and the rear wheel when in contact with the ground, and the leveling member can absorb part of the force when subjected to lateral force or non-uniform external interference, thereby reducing the imbalance of the shift plate and the rear wheel when in contact with the ground, and preventing the shift plate from scratching and wearing the ground when shaking.

[0008] Optionally, in the upright state, the straight line formed by the contact point between the leveling member and the ground and the contact point between the rear wheel and the ground is L, and the distance between the intersection of the vertical line where the center of gravity of the fuselage is located and the straight line L and the midpoint of the straight line L is less than or equal to ±150 mm. Through the above arrangement, the fuselage can maintain a good standing state in all gears, eliminate the risk of shaking or overturning of the fuselage in the upright state, and ensure that the fuselage can have a high standing stability in all gears.

[0009] Optionally, the angle β is less than or equal to 15°. Through the above arrangement, the fuselage has an angle deviation as small as possible in each gear position, avoiding excessive deviation angle of the fuselage center of gravity, and ensuring that the fuselage has high standing stability in each gear position.

[0010] Optionally, the size of the rear wheel is the same as that of the front wheel of the front wheel assembly, the rotation angle θ of the rear wheel 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 highest and lowest gears of the lowest cutting plane of the hand-push mower at the height adjustment part of the body; or the size of the rear wheel is greater than or equal to the size of the front wheel of the front wheel assembly, the rotation angle θ of the rear wheel satisfies: 90°<θ<270°, the distance between the second axis and the first axis is greater than the vertical distance between the highest and lowest gears of the lowest cutting plane of the hand-push mower at the height adjustment part of the body; wherein the lowest cutting plane is the cutting plane when the cutting part is cutting at the lowest gear. Through the above arrangement, it is ensured that when the shift plate and the rear wheel support the body to stand upright, when the angle relationship between the rear wheel and the support part between each gear is controlled to float within a small angle range, the center of gravity is offset backward at a smaller angle, and the angle between the shift plate and the ground is smaller when the body is laid flat, making the body more compact, shortening the product packaging height, and reducing production costs.

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

[0012] Optionally, the support portion and the main body are arranged at an angle. Through the above arrangement, the support portion and the main body are arranged in an L-shaped bending arrangement, so that the side of the leveling member arranged on the support portion close to the ground is a large surface, thereby having a larger contact area and improving the contact stability with the ground.

[0013] Optionally, the support portion and the main body are arranged in the same plane or parallel planes. With the above arrangement, the contact area between the shift plate and the ground can be reduced, so that the contact area between the leveling member and the ground is also relatively small, thereby reducing the wear on the ground as much as possible.

[0014] Optionally, an assembly opening is provided on the main body or the support portion, and the assembly opening is a closed opening or an open opening. By providing the assembly opening, a firm connection between the leveling member and the shift plate can be ensured.

[0015] Optionally, when the assembly opening is located at the main body, or the assembly opening is located at the support part and the support part and the main body are arranged in the same plane or parallel planes, when the assembly opening is a closed opening, the minimum distance h between the side of the assembly opening close to the ground and the outermost edge of the support part close to the ground in an upright state is greater than 2 mm. Through the above arrangement, the assembly opening can not only prevent the problem of local stress concentration caused by unreasonable design during assembly and use, but also avoid damage to the overall strength of the support part, thereby ensuring the long-term durability and stability of the support part.

[0016] Optionally, the support portion and the main body are arranged at an angle and the assembly opening is located at the support portion, and when the assembly opening is a closed opening, the minimum distance h between the periphery of the assembly opening and the outer periphery of the support portion is greater than 2 mm. Through the above arrangement, the assembly opening can not only prevent the problem of local stress concentration caused by unreasonable design during assembly and use, but also avoid damage to the overall strength of the support portion, thereby ensuring the long-term durability and stability of the support portion.

[0017] Optionally, the shift plate further comprises a fastener, and the leveling piece is connected and fixed to the support portion through the assembly opening and the fastener. By providing the fastener, the leveling piece can be firmly fixed on the support portion, and the leveling piece is prevented from falling off as much as possible, thereby reducing unnecessary maintenance and replacement.

[0018] Optionally, a positioning piece is provided on the main body or the support part, and a matching piece is provided on the leveling piece, and the matching piece is engaged with the positioning piece so that the leveling piece is sleeved on the support part. Through the above arrangement, the leveling piece can be connected and fixed to the support part by means of engagement, thereby improving the connection stability.

[0019] Optionally, the leveling piece has a groove, and the minimum distance between any opposing surfaces in the leveling piece is less than the thickness of the support portion, so that the leveling piece is sleeved on the support portion; or the inner wall of the groove is provided with a clamping piece, and the minimum distance between any opposing surfaces of the leveling piece is less than the thickness of the support portion, so that the leveling piece is sleeved on the support portion. Through the above arrangement, the leveling piece is provided as a U-shaped structure with both sides bent inward, so that it can be clamped with the support portion after being sleeved on the support portion, without the need for other fixing structures, which is simple and convenient. By providing the clamping piece, the connection firmness between the leveling piece and the support portion can be further improved.

[0020] Optionally, the first end of the leveling member is sleeved on the support portion, the second end of the leveling member extends from the support portion to the main body portion, the shift plate further comprises a fastener, and one or both ends of the leveling member are connected and fixed to the shift plate through the assembly opening and the fastener. Through the above arrangement, the end of the leveling member can be firmly connected and fixed to the shift plate to ensure the stability of the connection.

[0021] Optionally, the fastener includes a screw, the leveling member is provided with an assembly hole corresponding to the assembly opening, the screw passes through the assembly opening and extends into the assembly hole to be connected and fixed with the leveling member. The screw can be firmly connected with the leveling member, thereby improving the stability of the connection between the leveling member and the shift plate.

[0022] Optionally, a protrusion is provided on the leveling member, and the end of the protrusion is a clamping end, and the protrusion passes through the assembly opening and clamps with the support portion. Through the above arrangement, the clamping end of the protrusion can pass through the assembly opening and clamp the stopper on the inner side of the support portion, so that the leveling member is firmly connected to the support portion.

[0023] Optionally, the two ends of the leveling member have a first locking portion and a second locking portion, respectively, and at least one of the first locking portion and the second locking portion is locked with the assembly port. Through the above arrangement, the two ends of the leveling member can be locked with the shift plate, ensuring the stability of the connection between the leveling member and the shift plate.

[0024] Optionally, the leveling piece has a groove so that the leveling piece is sleeved on the support portion, and through holes corresponding to the assembly openings are respectively opened at both ends of the leveling piece, and the shift plate further includes a fastener, which passes through the two through holes and the assembly opening to connect and fix the leveling piece to the support portion. The connection between the fastener and the through holes and the assembly opening can ensure the stability of the connection between the leveling piece and the support portion.

[0025] Optionally, the two ends of the leveling member have buckle structures respectively, and the buckle structures are fixedly connected with the edge of the support portion. Through the above arrangement, the two ends of the leveling member can be connected with the support portion to achieve clamping and limiting, ensuring the stability of the connection between the leveling member and the support portion.

[0026] Optionally, the leveling member has a receiving groove and a through hole, the through hole is connected to the receiving groove, the end of the support portion is adaptively received in the receiving groove, the support portion is provided with an assembly opening, and the shift plate further comprises a fastener, the fastener passes through the through hole and the assembly opening and is connected and fixed to the support portion. The connection between the fastener and the through hole and the assembly opening can ensure the stability of the connection between the leveling member and the support portion.

[0027] Optionally, the support portion has a receiving groove and an assembly opening, the assembly opening is connected to the receiving groove, the opening of the receiving groove is away from the fuselage, the leveling piece is received in the receiving groove, and the shift plate further includes a fastener, which passes through the assembly opening and is connected and fixed to the leveling piece.

[0028] Optionally, the shift plate is made of a hard material.

[0029] Optionally, the shift plate is made of metal material.

[0030] Optionally, the leveling member is made of soft material.

[0031] Optionally, the soft material is at least one of plastic, silicone, rubber, Teflon, foam polyurethane, polyurethane elastomer or soft polyurethane. The above materials make the leveling piece flexible and wear-resistant, ensuring the service life.

[0032] Optionally, the leveling piece is a solid structure; or the leveling piece is a hollow structure; or the leveling piece has a hollow cavity, and a plurality of support columns are arranged at intervals in the hollow cavity. The solid structure ensures that the leveling piece is in full and stable contact with the ground; the hollow structure can play a further buffering role, so that the leveling piece and the ground are in more flexible contact, and the manufacturing cost of the leveling piece can be saved; while the support column plays a buffering role in the hollow cavity, it can transfer the gravity of the fuselage to the ground more fully, ensuring that the fuselage is in full contact with the ground, so that the fuselage is stably kept in an upright state.

[0033] Optionally, the support part and the main body are detachably connected; or the support part and the main body are integrally formed. The integrally formed setting can ensure that the shift plate has sufficient structural strength, thereby increasing the service life; the detachable connection setting is adopted, when the shift plate needs to be replaced and repaired, only the corresponding support part or the main body needs to be replaced, without replacing the entire shift plate, which is convenient for maintenance personnel to operate and reduces maintenance costs.

[0034] Optionally, the leveling piece is bonded to the support portion. In the above manner, the leveling piece can be directly connected and fixed to the support portion without other structural components, which is convenient and quick.

[0035] Optionally, the support portion is in at least one single shape or a combination of shapes selected from I-shape, J-shape, L-shape, T-shape, I-shape, C-shape and U-shape. With the above configuration, the support portion can be adapted to different connection modes.

[0036] Optionally, the side of the leveling member close to the ground is a plane, an arcuate surface, a trapezoidal surface or a sharp edge structure. With the above arrangement, the leveling member can be adapted to different gears of the fuselage height adjustment member.

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

[0038] Optionally, when the fuselage is in an upright state, the leveling member is in line contact with the ground at any gear position. Through the above arrangement, the contact area between the leveling member and the ground can be reduced, and scratching and wearing the ground can be avoided as much as possible.

[0039] Optionally, when the fuselage is in an upright state, the leveling member is in surface contact with the ground in any gear position. Through the above arrangement, in any gear position, the leveling member has a certain area in contact with the ground, ensuring the stability of the contact with the ground.

[0040] Optionally, under the action of the fuselage height adjustment member, the contact position between the leveling member and the ground changes with the gear position. Through the above arrangement, the leveling member can provide the best support for the fuselage at any gear position, and cooperate with the coordination of the rear wheel position to ensure the standing stability of the fuselage at any gear position.

[0041] Optionally, the support portion is rotatably connected to the main body, and the leveling piece is located on a side of the support portion away from the main body. By arranging the support portion to be rotatable, the leveling piece on the support portion can always keep in surface contact with the ground following gravity, thereby increasing the contact area between the leveling piece and the ground and improving the contact stability with the ground.

[0042] According to another aspect of the present invention, a hand-pushed lawn mower is provided, comprising a body, a body height adjustment member, a shift plate, a front wheel assembly, a rear wheel and a cutting member, wherein the rear wheel assembly comprises a rotating shaft and rear wheels arranged in pairs, wherein both ends of the rotating shaft are respectively connected to the paired rear wheels, the rotating shaft is assembled on the body, and the rotating shaft and the body are connected through two assembly points, wherein the straight line where the connection line between the two assembly points lies constitutes a first axis, and the straight line where the connection line between the centers of the paired rear wheels lies constitutes a second axis, and the first axis is not coaxial with the second axis, the body height adjustment member comprises at least two gears, and the body height adjustment member drives the rear wheels to rotate with the first axis as the center of the circle The shift plate is used to fold the grip of the fuselage and keep the fuselage upright when the grip is in the retracted state. The shift plate includes a main body and a support portion. The main body is connected to the fuselage, and the support portion is used to directly contact the ground. The rear wheel is tangent to the ground when the fuselage is in the upright state. When the fuselage height adjustment device is in the lowest gear, the tangent of the rear wheel located on the side away from the front wheel assembly and passing through the preset point W of the support portion is L1. When the fuselage height adjustment device is in the highest gear, the tangent of the rear wheel located on the side away from the front wheel assembly and passing through the preset point W of the support portion is L2. The angle β between the tangent L1 and the tangent L2 is an acute angle.

[0043] Optionally, in the upright state, the straight line formed by the contact point between the support part and the ground and the contact point between the rear wheel and the ground is L, and the distance between the intersection of the vertical line where the center of gravity of the fuselage is located and the straight line L and the midpoint of the straight line L is less than or equal to ±150 mm. Through the above arrangement, the fuselage can maintain a good standing state in each gear position, eliminate the risk of shaking or overturning of the fuselage in the upright state, and ensure that the fuselage can have a high standing stability in each gear position.

[0044] The angle β is less than or equal to 15°. Through the above arrangement, the fuselage has the smallest possible angle deviation in each gear position, avoiding excessive deviation of the fuselage center of gravity, and ensuring that the fuselage has high standing stability in each gear position.

[0045] Optionally, the size of the rear wheel is the same as that of the front wheel of the front wheel assembly, the rotation angle θ of the rear wheel 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 highest and lowest gears of the lowest cutting plane of the hand-push mower at the height adjustment part of the body; or the size of the rear wheel is greater than or equal to the size of the front wheel of the front wheel assembly, the rotation angle θ of the rear wheel satisfies: 90°<θ<270°, the distance between the second axis and the first axis is greater than the vertical distance between the highest and lowest gears of the lowest cutting plane of the hand-push mower at the height adjustment part of the body; wherein the lowest cutting plane is the cutting plane when the cutting part is cutting at the lowest gear. Through the above arrangement, it is ensured that when the shift plate and the rear wheel support the body to stand upright, when the angle relationship between the rear wheel and the support part between each gear is controlled to float within a small angle range, the center of gravity is offset backward at a smaller angle, and the angle between the shift plate and the ground is smaller when the body is laid flat, making the body more compact, shortening the product packaging height, and reducing production costs.

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

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

[0048] The hand-pushed lawn mower provided by the present invention comprises a machine body, a leveling member, a machine body height adjustment member, a shift plate, a front wheel assembly, a rear wheel assembly and a cutting member, the rear wheel assembly comprises a rotating shaft and rear wheels arranged in pairs, the two ends of the rotating shaft are respectively connected to the paired rear wheels, the rotating shaft is assembled on the machine body, the rotating shaft and the machine body are connected through two assembly points, the straight line where the connection line between the two assembly points is located constitutes a first axis, the straight line where the connection line between the centers of the rear wheels is located constitutes a second axis, and the first axis is not coaxial with the second axis, the machine body height adjustment member comprises at least two gears, the machine body height adjustment member drives the rear wheels to rotate with the first axis as the center to achieve height adjustment, the shift plate is used for folding The shift plate includes a main body and a support part, the main body is connected to the fuselage, and a leveling part is arranged on the support part for directly contacting the ground. The rear wheel is tangent to the ground when the fuselage is in an upright state. When the fuselage height adjustment part is at the lowest gear, the tangent line of the rear wheel located at the side away from the front wheel assembly and passing through the preset point W of the leveling part is L1. When the fuselage height adjustment part is at the highest gear, the tangent line of the rear wheel located at the side away from the front wheel assembly and passing through the preset point W of the leveling part is L2. The angle β between the tangent line L1 and the tangent line L2 is an acute angle. The axis centers of the shafts are set to be different axes, so that the fuselage height adjustment member can drive the rear wheel to rotate to achieve height adjustment, and the angle β between the tangent lines L1 and L2 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 member at the lowest gear and the highest gear is an acute angle, so that when the fuselage is stored upright, it is on a sufficiently wide and stable bottom surface to resist small vibrations or external impacts, and at the same time, the change in the angle relationship between the rear wheel and the support part between each gear is controlled to float within a small angle range, and its mechanical performance is improved by optimizing the support structure and geometric parameters, so as to better solve the problem of center of gravity fluctuation caused by structural changes during mechanical movement. It ensures that the equipment can reliably resist even complex external factors, improves the overall anti-dumping performance, and enables the machine to be stored vertically more safely and stably. In addition, by arranging leveling parts on the support part, the leveling parts can adapt to different terrains and provide the best support for the machine body, and cooperate with the coordination of the rear wheel position to ensure the standing stability of the machine body in any gear position. At the same time, it can effectively reduce the ground wear caused by friction, and also provide additional shock-absorbing effects, disperse the pressure of the support part, further enhance the stability of the machine body, eliminate the hidden dangers of shaking or overturning of the machine body in the upright state, and solve the problem of poor standing stability of lawn mowers in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 A schematic diagram of a bottom-up stereoscopic view of a push lawn mower provided by a specific embodiment of the present invention;

[0051] Figure 2 A schematic structural diagram of a push lawn mower in an upright position provided by a specific embodiment of the present invention;

[0052] Figure 3 for Figure 2 A partial enlarged view of the middle leveling piece;

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

[0054] Figure 5 A schematic diagram of the structure of the connection between the fuselage and the rear wheel assembly provided in a specific embodiment of the present invention;

[0055] Figure 6 A schematic diagram of multiple gears of a push lawn mower provided in a specific embodiment of the present invention;

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

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

[0058] Fig. 9 A schematic diagram of the third gear position of a push lawn mower provided by a specific embodiment of the present invention;

[0059] Fig.10 A partial enlarged view of a support portion provided for a specific embodiment of the present invention;

[0060] Fig.11 A partial enlarged view of a support portion provided for another specific embodiment of the present invention;

[0061] Fig.12 A partial enlarged view of a support portion provided for another specific embodiment of the present invention;

[0062] Fig.13A partial enlarged view of a support portion provided for another specific embodiment of the present invention;

[0063] Fig.14 A partial enlarged view of a support portion provided for another specific embodiment of the present invention;

[0064] Fig.15 A partial enlarged view of a support portion provided for another specific embodiment of the present invention;

[0065] Fig.16 A partial enlarged view of a support portion provided for another specific embodiment of the present invention;

[0066] Fig.17 A schematic diagram of an assembly port provided for a specific embodiment of the present invention.

[0067] Description of reference numerals:

[0068] 10-fuselage; 20-leveling piece; 201-first end; 202-second end; 21-groove; 22-through hole; 23-protrusion; 24-block; 25-clamping piece; 30-shift plate; 31-main body; 32-supporting part; 33-assembly port; 40-front wheel assembly; 50-rear wheel assembly; 51-spindle; 52-rear wheel; 60-fuselage height adjustment piece; 70-cutting piece. DETAILED DESCRIPTION

[0069] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

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

[0071] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0072] The invention solves the problem of poor standing stability of the lawn mower in the prior art.

[0073] like Figures 1 to 4 , Figures 6 to 9As shown, the push mower includes a body 10, a leveling member 20, a body height adjustment member 60, a shift plate 30, a front wheel assembly 40, a rear wheel assembly 50 and a cutting member 70. The front wheel assembly 40 and the rear wheel assembly 50 are respectively located at the front and rear sides of the body 10. It can be understood that the rear side of the body 10 is the operating side, and a grip (not shown) is provided at the rear side of the body 10 for the user to hold and operate the push mower. The shift plate 30 is provided at the rear side of the body 10, and is used to fold the grip of the body 10 and keep the body 10 upright when the grip is in the storage 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 respectively connected to the pair of rear wheels 52. The rotating shaft 51 is assembled on the fuselage 10. The rotating shaft 51 and the fuselage 10 are connected through two assembly points. The straight line where the connection line between the two assembly points is located constitutes the first axis, and the straight line where the connection line between the centers of the paired rear wheels 52 is located constitutes the second axis, and the first axis and the second axis are not coaxial. Specifically, the rotating shaft 51 is similar to a U-shape with two side extension sections. The middle section of the rotating shaft 51 is assembled on the fuselage 10 and serves as the first rotation axis. The two side sections of the rotating shaft 51 are respectively bent inward and then bent outward, and then respectively connected to the rear wheels 52. The two side sections of the rotating shaft 51 are coaxially arranged to form a second rotation axis, so that the rear wheel 52 rotates with the first axis as the center.

[0075] like Figures 10 to 16 As shown, the shift plate 30 includes a main body 31 and a support portion 32. The main body 31 is connected to the fuselage 10, and the support portion 32 is provided with the above-mentioned leveling member 20 for direct contact with the ground. Specifically, the main body 31 extends in a direction away from the rear wheel assembly 50 and toward the rear, and the support portion 32 is located at the extended end of the main body 31, so that the shift plate 30 and the rear wheel assembly 50 form a triangular / quadrangular structure supported at two points, ensuring the stability of the fuselage 10 when in an upright state.

[0076] In this embodiment, if Figure 2 and Figure 4 ,as well as Figures 5 to 9As shown, the body height adjustment member 60 includes at least 2 gears, which provide the lawn mower with the ability to adapt to cutting heights of different terrains and lawn conditions. In different gears, the height of the plane of the body 10 from the ground is different, thereby meeting the operational requirements of different cutting heights. The body height adjustment member 60 drives the rear wheels 52 to rotate around the first axis as the center of the circle to achieve height adjustment. Among them, when the body 10 is in an upright state, the rear wheels 52 are tangent to the ground, and under the action of the body height adjustment member 60, the contact position between the leveling member 20 and the ground changes with the change of the gear. In at least one gear, at least a portion of the leveling member 20 is in contact with the ground. Specifically, as Figure 2 As shown, there is a gear position where the leveling member 20 is in surface contact with the ground; Figure 4 As shown, there is a position where the leveling member 20 is in line contact with the ground. It is understandable that the leveling member 20 is a plate-shaped or block-shaped structure, and the posture of the fuselage 10 is different in different positions, so the angle between the leveling member 20 and the ground is different, and thus the contact with the ground is different.

[0077] Specifically, Figure 2 and Figure 4 As shown, in the upright state, the angle α between the fuselage 10 and the vertical direction is 0° to 20°. That is, in different gears, the posture range of the fuselage 10 is from vertical to 20° backward.

[0078] by Figure 2 For example, the angle α between the fuselage 10 and the vertical direction is 0°, that is, the angle between the fuselage 10 and the ground is 90°, and the side of the shift plate 30 close to the ground is parallel to the ground. Therefore, the bottom surface of the leveling member 20 set on the shift plate 30 is in contact with the ground, that is, surface contact. This contact mode can provide the greatest stability in a static state, distribute the weight of the fuselage 10 in a balanced manner, and reduce local wear and pressure concentration. When the angle between the fuselage 10 and the ground is not 90°, the side of the shift plate 30 close to the ground will not be parallel to the ground, and the edge of the bottom surface of the leveling member 20 on the shift plate 30 is in contact with the ground, that is, line contact. Due to the height change of the fuselage height adjustment member 60, the distance between the fuselage 10 and the ground becomes larger. After the rear wheel assembly 50 is used as a fulcrum, the leveling member 20 can provide the best stability in different usage scenarios. Of course, the included angle between the fuselage 10 and the ground may be other angles, that is, when the fuselage height adjustment member 60 is at other positions, the leveling member 20 and the ground are in surface contact, and is not limited to 90°, and can be selected according to actual needs.

[0079] Furthermore, when the fuselage 10 is in an upright state, the leveling member 20 is in surface contact with the ground at any gear position. Specifically, the support portion 32 is not a flat structure, but a curved structure, such as an arc or polygon. Accordingly, the leveling member 20 is also an arc or polygon, so that at any gear position, the leveling member 20 has a certain area in contact with the ground to ensure the stability of the contact with the ground. Of course, by adjusting the angle of the arc or polygon of the support portion 32, the leveling member 20 can also be in line contact with the ground at any gear position, thereby reducing the contact area with the ground and avoiding scratching and wearing the ground as much as possible. It can be selected according to actual needs.

[0080] In this embodiment, if Figures 6 to 9 As shown, when the fuselage height adjusting member 60 is in the lowest gear, the tangent 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 member 20 is L1, and when the fuselage height adjusting member 60 is in the highest gear, the tangent 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 member 20 is L2, and the angle β between the tangent L1 and the tangent L2 is an acute angle. By adopting the technical solution of the present application, by setting the axes of the rear wheel 52 and the rotating shaft 51 to be coaxial, the fuselage height adjustment member 60 can drive the rear wheel 52 to rotate to achieve height adjustment, and the 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 member 20 at the lowest gear and the highest gear is an acute angle, so that when the fuselage 10 is stored upright, it has a sufficiently wide and stable bottom surface at each gear position to resist small vibrations or external impacts, and at the same time, the angle relationship between the rear wheel 52 and the support part 32 between each gear position is controlled to float within a small angle range, and its mechanical properties are improved by optimizing the support structure and geometric parameters, so as to better solve the problem of center of gravity fluctuation caused by structural changes during mechanical movement, so as to ensure that the equipment can reliably resist even complex external factors, improve the overall anti-dumping performance, and enable the machine to be stored vertically more safely and stably.

[0081] It can be understood that the tangent lines 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 close to the leveling member 20 or the side for contacting the ground in an upright state.

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

[0083] Specifically, in this embodiment, the angle β is less than or equal to 15°. The above parameter range is adopted to make the fuselage 10 have as small an angle deviation as possible in each gear position, avoid the deviation angle of the center of gravity of the fuselage 10 being too large, and ensure that the fuselage 10 can have high standing stability in each gear position.

[0084] Furthermore, in this embodiment, if Figure 6 As shown, in the upright state, the straight line formed by the contact point of the leveling member 20 with the ground and the contact point of the rear wheel 52 with the ground is L, and 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 ±150 mm. Through the above-mentioned arrangement, the fuselage 10 can maintain a good standing state in the upright state in each gear position, eliminate the hidden dangers of shaking or overturning of the fuselage 10 in the upright state, and ensure that the fuselage 10 can have a high standing stability in the upright state in each gear position. It can be understood that the positive or negative 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 represents on which side of the midpoint of the straight line L the intersection of the vertical line where the center of gravity of the fuselage 10 is located. For example, Figure 6 In the figure, the intersection of the vertical line where the center of gravity of the fuselage 10 is located and the straight line L is negative when it is located on the left side of the midpoint of the straight line L, and is positive when it is located on the right side of the midpoint of the straight line L. When the intersection of the vertical line where the center of gravity of the fuselage 10 is located and the straight line L coincides with the midpoint of the straight line L, the value is 0.

[0085] In this embodiment, if Figures 7 to 9 As shown, the rotation angle θ of the rear wheel 52 is 90° to 270°. It can be understood that the rotation angle θ of the rear wheel 52 is the angle of the rear wheel 52 rotating clockwise with the left horizontal line extending from the first axis toward the front wheel assembly 40 as the reference of 0°. Through the above arrangement, the gear position of the fuselage height adjustment member 60 has a larger adjustable range, so as to adapt 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 highest gear and the lowest gear of the lowest cutting plane of the push lawn mower at the body height adjustment part 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 highest gear and the lowest gear of the lowest cutting plane of the push lawn mower at the body height adjustment part 60. Among them, the lowest cutting plane is the cutting plane when the cutting member 70 cuts at the lowest gear. It can be understood that when the size of the rear wheel 52 is the same as that of the front wheel of the front wheel assembly 40, and the distance between the second axis and the first axis is greater than or equal to the vertical distance between the highest gear and the lowest gear of the lowest cutting plane of the push mower at the body height adjustment member 60, when the rotation angle θ of the rear wheel 52 is 90°, the lowest cutting plane is at the lowest gear from the ground, which is also the lowest gear of the body height adjustment member 60. Figure 7 When the rotation angle θ of the rear wheel 52 is 270°, the lowest cutting plane is at the highest gear from the ground, which is also the highest gear of the fuselage height adjustment member 60, such as Fig. 9 shown.

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

[0088] Through the above arrangement, it is ensured that when the shift plate 30 and the rear wheel 52 support the fuselage 10 to stand upright, when the angle relationship between the rear wheel 52 and the support portion 32 is controlled to float within a small angle range between each gear position, the center of gravity shifts backward at a smaller angle, and the angle between the shift plate 30 and the ground is smaller when the fuselage 10 is laid flat, making the fuselage 10 more compact, shortening the product packaging height, and reducing production costs. Further, in this embodiment, the radius of the rear wheel 52 is greater than the distance between the second axis and the first axis by 20 mm. In other words, the distance between the first axis and the outer periphery of the rear wheel 52 is 20 mm.

[0089] In this embodiment, the hardness of the leveling member 20 is less than the hardness of the supporting portion 32. In other words, the leveling member 20 is made of a flexible material. By providing the leveling member 20 and selecting the leveling member 20 as a flexible material, the leveling member 20 can adapt to different terrains and provide the best support for the fuselage 10, and cooperate with the coordination of the position of the rear wheel assembly 50 to ensure the standing stability of the fuselage 10 in any gear position, and at the same time can effectively reduce the ground wear caused by friction, and also provide an additional shock-absorbing effect, disperse the pressure of the support part 32, further enhance the stability of the fuselage 10, and eliminate the hidden dangers of shaking or overturning of the fuselage 10 in the storage state. In addition, the leveling member 20 can better adapt to tiny irregular surfaces, thereby improving the fit effect of the overall installation of the device with the uneven ground, and the balance imbalance when the shift plate 30 and the rear wheel 52 are in contact with the ground. The leveling member 20 can absorb part of the force when subjected to lateral force or non-uniform external interference, thereby reducing the balance imbalance when the shift plate 30 and the rear wheel 52 are in contact with the ground, and avoiding the shift plate 30 from scratching and wearing the ground when shaking.

[0090] In this embodiment, the shift plate 30 is made of a hard material. Further, the shift plate 30 is made of a metal material. For example, the shift plate 30 is an iron plate, an alloy plate or a stainless steel plate.

[0091] In this embodiment, the leveling member 20 is made of a soft material. Furthermore, since there is friction between the leveling member 20 and the ground, the leveling member 20 needs to be wear-resistant on the basis of flexibility to ensure service life. Specifically, the soft material is at least one of plastic, silicone, rubber, Teflon, foam polyurethane, polyurethane elastomer or soft polyurethane.

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

[0093] In this embodiment, in order to ensure that the leveling member 20 is in full and stable contact with the ground, the leveling member 20 is a solid structure. Of course, the leveling member 20 can also be a hollow structure. That is to say, the leveling member 20 has a hollow cavity, and the hollow cavity is filled with air. Through the above arrangement, the hollow cavity can play a further buffering role, so that the leveling member 20 and the ground are in more flexible contact, and the manufacturing cost of the leveling member 20 can be saved. Furthermore, a plurality of support columns can be arranged at intervals in the hollow cavity, so that while the hollow cavity plays a buffering role, the support columns can transfer the gravity of the fuselage 10 to the ground more fully, ensuring that the fuselage 10 is in full contact with the ground, so that the fuselage 10 is firmly maintained in an upright state.

[0094] In this embodiment, the support portion 32 is integrally formed with the main body portion 31. Through the above arrangement, it is possible to ensure that the shift plate 30 has sufficient structural strength, thereby increasing the service life.

[0095] In an optional embodiment, the support portion 32 is detachably connected to the main body 31. With the above arrangement, when the shift plate 30 needs to be replaced and repaired, only the corresponding support portion 32 or the main body 31 needs to be replaced, without replacing 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 31, and the leveling member 20 is located on the side of the support portion 32 away from the main body 31. Specifically, the ends of the main body 31 and the support portion 32 that are close to each other are respectively provided with rotation holes, and the rotation shafts pass through the upper rotation holes of the two components respectively, so that the support portion 32 can rotate relative to the main body 31. By setting the support portion 32 in a rotatable manner, the leveling member 20 on the support portion 32 can follow gravity and always face the ground and maintain surface contact with the ground, 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 piece is provided on the main body 31 or the support part 32, and a matching piece is provided on the leveling piece 20, and the matching piece is engaged with the positioning piece, so that the leveling piece 20 is sleeved on the support part 32. Specifically, the positioning piece can be a protruding piece, and the matching piece can be a recessed piece, or the positioning piece can be a recessed piece, and the matching piece can be a protruding piece, so that the leveling piece 20 and the support part 32 are engaged and fixed by the concave-convex engagement, and the engagement between the leveling piece 20 and the support part 32 is convenient for installation and disassembly, and can also maintain good connection stability during use.

[0098] In this embodiment, when the shift plate 30 is not provided with the leveling member 20, the contact portion between the support portion 32 and the ground is the support surface, and after the shift plate 30 is provided with the leveling member 20, the area relationship between the leveling member 20 and the support surface can be greater than, equal to, or less than. Specifically, when the area of ​​the leveling member 20 is smaller than the support surface, the leveling member 20 is located in the middle of the support portion 32 to ensure contact stability. Of course, the leveling member 20 can also be adapted to the support surface, that is, the areas are equal, so as to more fully contact the ground; further, the area of ​​the leveling member 20 can also be larger than the support surface, that is, the edge of the leveling member 20 exceeds the edge of the support surface, which can further improve the contact stability with the ground. The above method can be selected according to actual needs.

[0099] In an optional embodiment, the push lawn mower may not include the leveling member 20. Specifically, the push lawn mower includes a body 10, a body height adjustment member 60, a shift plate 30, a front wheel assembly 40, a rear wheel assembly 50 and a cutting member 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 assembled on the body 10. The rotating shaft 51 and the body 10 are connected through two assembly points. The straight line where the connection between the two assembly points is located constitutes a first axis. The straight line where the connection between the centers of the paired rear wheels 52 is located constitutes a second axis. The first axis and the second axis are not coaxial. The body height adjustment member 60 includes at least 2 gears. The body height adjustment member 60 drives the rear wheels 52 to rotate with the first axis as the center to achieve height adjustment. The shift plate 30 is used to fold the handle of the body 10 and when the handle is in the storage state The fuselage 10 is kept upright, the shift plate 30 includes a main body 31 and a support portion 32, the main body 31 is connected to the fuselage 10, and the support portion 32 is used to directly contact the ground. The rear wheel 52 is tangent to the ground when the fuselage 10 is in an upright state. When the fuselage height adjustment member 60 is in the lowest gear, the tangent 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 portion 32 is L1. When the fuselage height adjustment member 60 is in the highest gear, the tangent 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 portion 32 is L2, and the angle β between the tangent L1 and the tangent L2 is an acute angle.

[0100] Furthermore, when the leveling member 20 is not included, the straight line formed by the contact point between the support portion 32 and the ground and the contact point between the rear wheel 52 and the ground is L, and 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 ±150 mm.

[0101] The specific structures of the shift plate 30 and the leveling member 20 are described below.

[0102] Embodiment 1

[0103] In this embodiment, the support portion 32 is arranged at an angle to the main body 31. That is, the support portion 32 is arranged at an L-shaped bend to the main body 31. In this way, the side of the leveling member 20 arranged on the support portion 32 close to the ground is a large surface, thereby having a larger contact area and improving the contact stability with the ground.

[0104] Specifically, the support portion 32 and the main body 31 form an angle of 90°, wherein the main body 31 is vertically arranged and the support portion 32 is bent inwardly. With the above arrangement, the leveling member 20 arranged on the support portion 32 can have as large a contact area with the ground as possible, and the inward bending can save space and prevent the support portion 32 from exceeding the width of the fuselage 10. Of course, the support portion 32 and the main body 31 can also form other angles, and the support portion 32 can also be bent outwardly, which can be selected according to actual needs.

[0105] like Fig.10 As shown, both ends of the leveling member 20 have buckle structures, which are fixedly connected with the edge of the support portion 32. Specifically, the leveling member 20 has a groove 21. Fig.10 Specifically, a block 24 is provided on the inner walls of the upper and lower sides of the groove 21, and a gap is formed between the block 24 and the groove bottom of the groove 21. The support portion 32 is accommodated in the space between the block 24 and the groove bottom in the groove 21, and is limited by the block 24 through the upper and lower edges of the support portion 32. Furthermore, the support portion 32 has a limiting section at one end away from the main body 31, and the limiting section is bent in an L shape, so as to limit and stop the leveling member 20, and prevent the leveling member 20 from detaching from one end of the support portion 32.

[0106] In an alternative embodiment, similar to Fig.10 In the arrangement, the leveling member 20 has a groove 21, and the groove 21 is along Fig.10 The minimum distance between any two opposite surfaces of the leveling member 20 is less than the thickness of the support portion 32, so that the leveling member 20 is sleeved on the support portion 32. Fig.10 In the embodiment, the thickness of the support portion 32 is the dimension in the vertical direction. The leveling member 20 in this embodiment is configured as a U-shaped structure with both sides bent inward, so that it can be clamped with the support portion 32 after being sleeved on the support portion 32, without the need for other fixing structures, which is simple and convenient. Furthermore, a clamping member can be provided on the inner wall of the groove 21 so that the leveling member 20 is sleeved on the support portion 32. By providing the clamping member, the connection firmness between the leveling member 20 and the support portion 32 can be further improved.

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

[0108] Furthermore, the shift plate 30 further includes a fastener, and the leveling member 20 is connected and fixed to the support portion 32 through the assembly opening 33 and the fastener. By setting the connection and assembly of the fastener and the assembly opening, the leveling member 20 can be firmly fixed on the support portion 32, and the leveling member 20 is prevented from falling off as much as possible, reducing unnecessary maintenance and replacement.

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

[0110] In an alternative embodiment, if Fig.17 As shown, the assembly opening 33 is an opening. It is understandable that the closed opening is a closed opening that is not connected to the edge of the component where the assembly opening 33 is located, and the open opening is a opening that is connected to the edge of the component where the assembly opening 33 is located.

[0111] In this embodiment, if Fig.12 As shown, when the assembly opening 33 is located at the support portion 32, the minimum distance h between the periphery of the assembly opening 33 and the outer periphery of the support portion 32 is greater than 2 mm. Through the above arrangement, the assembly opening 33 does not affect the structural strength of the support portion 32 itself, ensuring the service life of the support portion 32.

[0112] In an alternative embodiment, if Fig.12 As shown, the first end 201 of the leveling member 20 is sleeved on the support portion 32, and the second end 202 of the leveling member 20 extends from the support portion 32 to the main body 31. The second end 202 of the leveling member 20 is connected and fixed to the shift plate 30 through the assembly opening 33 and the fastener. Specifically, the first end of the leveling member 20 and the support portion 32 is an end away from the main body 31, and the assembly opening 33 is provided on the support portion 32 and is located near the second end of the support portion 32. The leveling member 20 is L-shaped, and the first end 201 of the leveling member 20 has a sleeve port adapted to the support portion 32, so that the extended end of the support portion 32 is inserted into the first end 201 of the leveling member 20, and the second end 202 of the leveling member 20 is flush with the bending surface of the main body 31 and the support portion 32 or exceeds a part of the bending surface of the main body 31 and the support portion 32, and then the fastener passes through the assembly opening 33 to connect with the leveling member 20 to achieve connection and fixation.

[0113] In an alternative embodiment, if Fig.11As shown, the assembly opening 33 is provided on the main body 31, the leveling member 20 is U-shaped, and the first end 201 of the leveling member 20 has a socket adapted to the support portion 32, so that the extended end of the support portion 32 is passed through the first end of the leveling member 20, and the second end 202 of the leveling member 20 is attached to the main body 31, and then the fastener passes through the assembly opening 33 to connect with the leveling member 20 to achieve connection and fixation. In this embodiment, the second end 202 of the leveling member 20 also has a through hole 22, so that the fastener passes through the assembly opening 33 and the through hole 22 in sequence to achieve connection and fixation of the leveling member 20 and the main body 31.

[0114] In an alternative embodiment, different from Fig.11 In the structure, the first end of the support portion 32 has a limiting section, and the limiting section is bent in an L shape. The first end of the support portion 32 is also provided with an assembly opening 33. The first end of the leveling member 20 also has a through hole 22. There are two fasteners, and the two fasteners pass through the two through holes 22 and the assembly opening 33 respectively to connect and fix the leveling member 20 to the support portion 32.

[0115] It should be noted that there may be multiple assembly openings 33 and vias 22 at the same position to improve the connection firmness.

[0116] In an alternative embodiment, if Fig.14 As shown, a protrusion 23 is provided on the leveling member 20, and the end of the protrusion 23 is a clamping end. The protrusion 23 passes through the assembly opening 33 and is clamped with the support portion 32. Specifically, the assembly opening 33 is provided on the support portion 32, and the protrusion is located on the side of the leveling member 20 close to the support portion 32, and is provided corresponding to the assembly opening 33. The clamping end of the protrusion 23 passes through the assembly opening 33 and is clamped with the support portion 32 to stop. Further, the protrusion 23 can be one or more. When there is one protrusion 23, the protrusion 23 is located in the middle position of the leveling member 20. When there are multiple protrusions 23, there are also multiple assembly openings 33. Multiple protrusions 23 are evenly spaced on the leveling member 20 to improve the connection firmness.

[0117] In an optional embodiment, the support portion 32 has a receiving groove and an assembly opening 33, the assembly opening 33 is connected to the receiving groove, the opening of the receiving groove is away from the fuselage 10, the leveling member 20 is received in the receiving groove, and the fastener passes through the assembly opening 33 to be connected and fixed to the leveling member 20. Specifically, the support portion 32 is a U-shaped structure, so as to form a receiving groove, and the size of the leveling member 20 is adapted to the receiving groove, so that the leveling member 20 is just received in the receiving groove, and then connected and fixed to the support portion 32 by the fastener. Of course, it is also possible that the support portion 32 has an assembly opening 33, the leveling member 20 has a receiving groove, the support portion 32 has a clamping protrusion adapted to the receiving groove, the clamping protrusion is adaptively received in the receiving groove, and then the support portion 32 is connected and fixed to the leveling member 20 by the fastener.

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

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

[0120] In this embodiment, adapted to different connection modes, the support portion 32 may be at least one single shape or a combination of I-shape, J-shape, L-shape, T-shape, I-shape, C-shape, and U-shape, and may be selected according to actual needs.

[0121] In this embodiment, the side of the leveling member 20 close to the ground is a plane, an arc-shaped surface, a trapezoidal surface or a sharp edge structure.

[0122] Embodiment 2

[0123] The present embodiment is different from the first embodiment in that the structures of the main body 31 and the supporting part 32 are different.

[0124] Specifically, in this embodiment, the support portion 32 and the main body 31 are arranged in the same plane or parallel planes. In other words, the support portion 32 and the main body 31 are both arranged vertically. With the above arrangement, the contact area between the shift plate 30 and the ground can be reduced, so that the contact area between the leveling member 20 and the ground is also relatively small, thereby reducing the wear on the ground as much as possible.

[0125] In this embodiment, if Figure 3 As shown, when the assembly opening 33 is a closed opening, the minimum distance h between the side of the assembly opening 33 close to the ground and the outermost edge of the support portion 32 close to the ground in an upright state is greater than 2 mm. Specifically, the edge of the support portion 32 is not a regular straight line, but a curve or arc with continuous bending segments, so the distance between the assembly opening 33 and the outermost edge of the support portion 32 is different at different positions. Through the above arrangement, the assembly opening 33 will not affect the structural strength of the support portion 32 itself, ensuring the service life of the support portion 32.

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

[0127] Further, such as Fig.16 As shown, a clamping member 25 may be provided on the inner wall of the groove 21 so that the leveling member 20 is sleeved on the support portion 32. By providing the clamping member 25, the connection firmness between the leveling member 20 and the support portion 32 can be further improved.

[0128] In an alternative embodiment, if Fig.15 As shown, the leveling member 20 has a groove 21 so that the leveling member 20 is sleeved on the support portion 32. Through holes 22 corresponding to the assembly openings 33 are respectively opened at both ends of the leveling member 20. The fastener passes through the two through holes 22 and the assembly openings 33 to connect and fix the leveling member 20 to the support portion 32.

[0129] In an optional embodiment, the first end of the leveling member 20 is sleeved on the support portion 32, the second end of the leveling member 20 extends from the support portion 32 to the main body 31, and one or both ends of the leveling member 20 are connected and fixed to the main body 31 through the assembly opening 33 and the fastener. Specifically, the first end of the leveling member 20 and the support portion 32 is the end away from the main body 31, and the assembly opening 33 is provided on the support portion 32 or the main body 31, depending on the length of the leveling member 20. The leveling member 20 is L-shaped, and the first end of the leveling member 20 has a sleeve port adapted to the support portion 32, so that the extended end of the support portion 32 is inserted into the first end of the leveling member 20, and then the second end of the leveling member 20 is connected to the support portion 32 or the main body 31 through the fastener through the assembly opening 33 to achieve connection and fixation.

[0130] In an optional embodiment, a protrusion is provided on the leveling member 20, and the end of the protrusion is a clamping end, and the protrusion passes through the assembly opening 33 and clamps with the support portion 32. Specifically, the assembly opening 33 is provided on the support portion 32 or the main body 31, and the protrusion is located on the side of the leveling member 20 close to the shift plate 30, and is provided corresponding to the assembly opening 33. The clamping end of the protrusion passes through the assembly opening 33 and clamps with the shift plate 30 to stop. Further, the protrusion can be one or more. When there is one protrusion, the protrusion is located in the middle position of the leveling member 20. When there are multiple protrusions, there are also multiple assembly openings 33. Multiple protrusions are evenly spaced on the leveling member 20 to improve the connection firmness.

[0131] In an optional embodiment, the leveling member 20 has a receiving groove and a through hole 22, the through hole 22 is connected to the receiving groove, the end of the support portion 32 is adaptively received in the receiving groove, the support portion 32 is provided with an assembly opening 33, and the shift plate 30 further includes a fastener, the fastener passes through the through hole 22 and the assembly opening 33 to be connected and fixed to the support portion 32. Specifically, the leveling member 20 is 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 just received in the receiving groove, and then connected and fixed to the leveling member 20 by the fastener. Of course, it is also possible that the end of the support portion 32 is a U-shaped structure, thereby forming a receiving groove, the opening of the receiving groove is away from the fuselage 10, the leveling member 20 is received in the receiving groove, and the fastener passes through the assembly opening 33 to be connected and fixed to the leveling member 20.

[0132] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: the hand-pushed lawn mower includes a body 10, a leveling member 20, a body height adjustment member 60, a shift plate 30, a front wheel assembly 40, a rear wheel assembly 50 and a cutting member 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 assembled on the body 10, the rotating shaft 51 and the body 10 are connected through two assembly points, the straight line where the connection line between the two assembly points is located constitutes a first axis, the straight line where the connection line between the centers of the rear wheels 52 is located constitutes a second axis, and the first axis is different from the second axis. The fuselage height adjustment member 60 includes at least two gears. The fuselage height adjustment member 60 drives the rear wheel 52 to rotate with the first axis as the center of the circle to achieve height adjustment. The shift plate 30 is used to fold the grip of the fuselage 10 and keep the fuselage 10 upright when the grip is in the storage state. The shift plate 30 includes a main body 31 and a support part 32. The main body 31 is connected to the fuselage 10. The support part 32 is provided with a leveling member 20 for direct contact with the ground. The rear wheel assembly 50 is tangent to the ground when the fuselage 10 is in the upright state. At each gear of the fuselage height adjustment member 60, the angle between each straight line L formed by the contact point of the leveling member 20 with the ground and the contact point of the rear wheel 52 with the ground β is an acute angle. By setting the axes of the rear wheel 52 and the rotating shaft 51 to be coaxial, the fuselage height adjustment member 60 can drive the rear wheel 52 to rotate to achieve height adjustment. The angle β between the straight lines L formed by the contact points of the leveling member 20 with the ground and the contact points of the rear wheel 52 with the ground in each gear position is an acute angle. When the fuselage 10 is stored upright, it has a sufficiently wide and stable surface in each gear position 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 position is controlled to float within a small angle range. By optimizing the support structure and geometric parameters, its mechanical performance is improved, and the problem of mechanical movement caused by The structural changes lead to the problem of center of gravity fluctuation, to ensure that the equipment can reliably resist even if it encounters complex external factors, improve the overall anti-dumping performance, and enable the machine to be stored vertically more safely and stably. In addition, by arranging the leveling member 20 on the support part 32, the leveling member 20 can adapt to different terrains and provide the best support for the fuselage 10, and cooperate with the coordination of the position of the rear wheel assembly 50 to ensure the standing stability of the fuselage 10 in any gear position. At the same time, it can effectively reduce the ground wear caused by friction, and also provide additional shock-absorbing effect, disperse the pressure of the support part 32, further enhance the stability of the fuselage 10, and eliminate the hidden dangers of shaking or overturning of the fuselage 10 in the storage state.

[0133] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the present invention.

Claims

1. A push lawn mower, characterized in that: The invention comprises a fuselage (10), a leveling member (20), a fuselage height adjustment member (60), a shift plate (30), a front wheel assembly (40), a rear wheel assembly (50) and a cutting member (70), wherein the rear wheel assembly (50) comprises 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 fuselage (10), and the rotating shaft (51) and the fuselage (10) are connected by two The two assembly points are connected, the straight line where the connection line between the two assembly points is located constitutes a first axis, the straight line where the connection line between the centers of the paired rear wheels (52) is located constitutes a second axis, and the first axis is not coaxial with the second axis, the fuselage height adjustment member (60) comprises at least two gears, the fuselage height adjustment member (60) drives the rear wheels (52) to rotate with the first axis as the center to achieve height adjustment, the shift plate (30) is used to fold the grip of the fuselage (10) and keep the fuselage (10) upright when the grip is in a retracted state, the shift plate (30) comprises a main body (31) and a support part (32), the main body (31) is connected to the fuselage (10), the support part (32) is provided with the leveling member (20) for direct contact with the ground, the rear wheels (52) are tangent to the ground when the fuselage (10) is in an upright state, and the fuselage height adjustment member (60) is in the lowest gear. When the rear wheel (52) is at a side away from the front wheel assembly (40) and passing through a preset point W of the leveling member (20), the tangent line of the rear wheel (52) is L1; when the fuselage height adjustment member (60) is at a highest gear, the tangent line of the rear wheel (52) is at a side away from the front wheel assembly (40) and passing through the preset point W of the leveling member (20), and the angle β between the tangent line L1 and the tangent line L2 is an acute angle.

2. The push lawn mower according to claim 1, characterized in that: In at least one gear position, at least a portion of the leveling member (20) is in contact with the ground, wherein the hardness of the leveling member (20) is smaller than the hardness of the support portion (32).

3. The push lawn mower according to claim 1, characterized in that: In the upright state, the straight line formed by the contact point between the leveling member (20) and the ground and the contact point between the rear wheel (52) and the ground is L, and 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 ±150 mm.

4. The push lawn mower according to claim 1, characterized in that: The angle β is less than or equal to 15°.

5. The push lawn mower according to claim 1, characterized in that: The size of the rear wheel (52) is the same as that of the front wheel of the front wheel assembly (40), the rotation angle θ of the rear wheel (52) 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 highest gear and the lowest gear of the lowest cutting plane of the hand-push lawn mower on the body height adjustment member (60); or 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°, and the distance between the second axis and the first axis is greater than the vertical distance between the highest gear and the lowest gear of the lowest cutting plane of the push lawn mower on the body height adjustment member (60); Wherein, the lowest cutting plane is the cutting plane when the cutting member (70) is cutting at the lowest gear position.

6. The push lawn mower according to claim 1, characterized in that: The radius of the rear wheel (52) is 20 mm greater than the distance between the second axis and the first axis.

7. The push lawn mower according to claim 1, characterized in that: The support portion (32) and the main body portion (31) are arranged at an angle.

8. The push lawn mower according to claim 1, characterized in that: The support portion (32) and the main body portion (31) are arranged in the same plane or in parallel planes.

9. The push lawn mower according to claim 7 or 8, characterized in that: The main body (31) or the support portion (32) is provided with an assembly opening (33), and the assembly opening (33) is a closed opening or an open opening.

10. The push lawn mower according to claim 9, characterized in that: In the case where the assembly opening (33) is located on the main body (31), or the assembly opening (33) is located on the support portion (32) and the support portion (32) and the main body (31) are arranged in the same plane or parallel planes, when the assembly opening (33) is a closed opening, the minimum distance h between the side of the assembly opening (33) close to the ground and the outermost edge of the support portion (32) close to the ground in the upright state is greater than 2 mm.

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