WO2023131294A1

WO2023131294A1 - Lawn mower

Info

Publication number: WO2023131294A1
Application number: PCT/CN2023/070998
Authority: WO
Inventors: 杜江; 程坤; 王向荣
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2022-01-06
Filing date: 2023-01-06
Publication date: 2023-07-13
Also published as: CN217363833U

Abstract

A lawn mower (100), comprising: a frame (1); a cutting assembly (2), which comprises at least one cutter disc (22) and at least two blades (23), which are arranged on the cutter disc (22) and distributed in a circumferential direction of the cutter disc (22); a first height-adjusting device (3), which is configured to adjust the height of the cutting assembly (2) relative to the frame (1); a floating connection device (4), one end of the floating connection device being pivotally connected to the first height-adjusting device (3), and the other end thereof being pivotally connected to the cutting assembly (2), and the floating connection device (4) being configured to be capable of changing the posture thereof under the action of an external force; and a ground engaging member (5), which is arranged at the end of the cutting assembly (2) facing the ground (200). The lawn mower (100) has a first cutting mode and a second cutting mode. In the first cutting mode, the ground engaging member (5) is separated from the ground (200), the floating connection device (4) is in a tensioned state, and the first height-adjusting device (3) adjusts the height of the cutting assembly (2) relative to the frame (1) by means of raising and lowering the floating connection device (4). In the second cutting mode, the ground engaging member (5) is in contact with the ground (200) and is configured to enable the cutting assembly (2) to change the posture thereof according to a change in the posture of the floating connection device (4), so as to adapt to terrain changes.

Description

Lawn mower

technical field

The application relates to a lawn mower, which belongs to garden equipment.

Background technique

Lawn mowers perform the work of mowing lawns, which currently typically have low-cut and high-cut areas. For example, in golf courses, low-cut areas such as fairway areas generally require grass cutting heights of 10-15mm, and high-cut areas such as semi-long grass areas and long grass areas generally require grass cutting heights to be 20-70mm. Existing lawn mowers cannot meet the requirement of trimming both low cutting area and high and low cutting area. For example, the existing lawn mowers with low cutting height (10mm) are all hob mowers; There are temporarily no products with a low cutting height (10mm) for lawn mowers with a cutting width greater than 600mm. Among the existing lawn mowers in golf courses, the rotary lawn mower is only responsible for the semi-long grass area and the long grass area, and the fairway needs to be cut by another hob mower. In this way, the golf course needs to purchase two lawn mowers for Operate in different cutting areas.

Contents of the invention

The purpose of this application is to provide a lawn mower that can adapt to cutting at different heights and can ensure the consistency of cutting heights.

In order to achieve the above object, the application provides the following technical solutions:

A lawn mower, characterized in that the lawn mower comprises:

frame;

The cutting assembly is arranged on the frame, and the cutting assembly includes: at least one cutterhead and a driving device for driving the cutterhead to rotate, the cutterhead is connected to the output end of the driving device; At least two blades on the cutter head and distributed along the circumferential direction of the cutter head, the cutter head drives the blades to rotate for cutting;

A first height adjustment device, one end of the first height adjustment device is connected to the frame body, configured to adjust the height of the cutting assembly relative to the frame body;

A floating connection device, one end is pivotally connected to the first height-adjusting device, and the other end is pivotally connected to the cutting assembly, configured to change its own posture under the action of an external force;

a ground engaging member disposed at the ground-facing end of the cutting assembly;

The lawn mower has a first cutting mode and a second cutting mode; in the first cutting mode, the cutting assembly has a first cutting height, the ground engaging member is separated from the ground, and the floating connection is in In the tensioned state, the first height-adjusting device adjusts the height of the cutting assembly relative to the frame body by lifting the floating connection device; in the second cutting mode, the cutting assembly has a second cutting The height, where the ground engaging member is in contact with the ground, is configured to incorporate changes in the pose of the floating linkage such that the cutting assembly can change its pose to accommodate changes in terrain.

In some embodiments, the blade includes at least one straight cutting edge, and the thickness of the blade is 0.5mm-1mm.

In some embodiments, the ground engaging member includes a rotating wheel that is rotatable relative to the cutting assembly, and in the second cutting mode, the rotating wheel is in contact with the ground when the rotating wheel is moved by the cutting assembly When the pressure is high, the rotating wheel can rotate along the ground.

In some embodiments, the floating connection means includes a flexible connection member.

In some embodiments, the floating connection device includes a link member, one end of the link member is pivotally connected and movably connected to the first height adjustment device, and the other end is pivotally connected to the cutting assembly, or, One end of the link member is pivotally connected to the first height adjusting device, and the other end is pivotally connected to the cutting assembly and is movably connected.

In some embodiments, the cutting assembly further includes a second height adjusting device configured to adjust the relative distance between the blade and the output end of the driving device in the vertical direction to adjust the cutting height of the blade.

In some embodiments, the second height-adjusting device is a height-adjusting member arranged between the cutter head and the blade, and the height-adjusting member adjusts the vertical height between the cutter head and the blade. The relative distance in the direction is used to adjust the relative distance in the vertical direction between the blade and the output end of the driving device.

In some embodiments, the second height-adjusting device is a height-adjusting component arranged at the connection between the cutter head and the output end of the driving device, and the height-adjusting component adjusts the output of the cutter head and the driving device The relative distance between the ends in the vertical direction is used to adjust the relative distance between the blade and the output end of the driving device in the vertical direction.

In some embodiments, the first height adjustment device includes an actuating device, a first crank connecting rod, a second crank connecting rod, a first pivot member, and a second pivot member; The advance direction of the lawn mower is arranged longitudinally, the axis direction of the first pivot part and the second pivot part is perpendicular to the advance direction of the lawnmower and the first pivot part and the second pivot part are rotatable is attached to the frame, one end of the actuator is hinged to the frame, and the other end is connected to the first pivot member; the first crank connecting rod and the second crank connecting rod are connected along the The advancing direction of the lawn mower is arranged longitudinally and located on both sides of the actuating device respectively, one end of the first crank connecting rod and the second crank connecting rod are respectively pivotally connected to the two ends of the first pivot member, The other ends of the first crank connecting rod and the second crank connecting rod are respectively pivotably connected to two ends of the second pivot member.

In some embodiments, the first cutting height is 20-70 mm, and the second cutting height is 10-15 mm.

The beneficial effect of the present application is that: the lawnmower of the present application has a first cutting mode and a second cutting mode, so that the lawnmower equipped with the cutting assembly can meet the draft cutting requirements of different mowing areas, and the lawnmower can be cut at a low cutting speed. The consistency of the cutting height and the passability of the cutter head can be guaranteed.

The above description is only an overview of the technical solution of the application. In order to understand the technical means of the application more clearly and implement it according to the contents of the specification, the preferred embodiment of the application and accompanying drawings are described in detail below.

Description of drawings

Fig. 1 is a structural schematic diagram of a lawnmower shown in some embodiments of the present application in a second cutting mode;

Fig. 2 is a schematic structural diagram of the first height adjustment device shown in some embodiments of the present application;

Fig. 3 is a schematic structural diagram of a floating connection device shown in some embodiments of the present application;

Fig. 4 is a schematic structural diagram of a lawnmower in a first cutting mode according to some embodiments of the present application.

Explanation of reference signs:

100, lawn mower; 200, ground; 1, frame body; 2, cutting assembly; 20, deck; 21, drive device; 210, drive device output end; 22, cutter head; 23, blade; Height device a; 25, second height adjustment device b; 26,; 27,; 3, first height adjustment device; 30, actuation device; 301, linear actuation component; 302, third crank connecting rod; 31, The first crank connecting rod; 32, the second crank connecting rod; 33, the first pivot component; 34, the second pivot component; 4, the floating connection device; 40, the connecting rod component; 41, the rotation pair a; 42, Moving pair; 43. Rotating pair b; 5. Ground engaging component; 6. Driving device; 61. Front wheel; 62. Rear wheel.

Detailed ways

The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplification of the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific orientation construction and operation, therefore should not be construed as limiting the application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

In addition, the technical features involved in the different embodiments of the present application described below may be combined as long as they do not constitute a conflict with each other.

Referring to FIG. 1 , a lawn mower 100 can cut grass within a moving range. The lawnmower 100 can be an automatically controlled lawnmower 100 or a manually controlled lawnmower 100. In addition, the lawnmower 100 can also be equipped with other lawnmower 100 work stations except that the cutting assembly 2 is carried. Required components, such as camera components, etc. The lawnmower 100 generally has a frame body 1 . The forward and backward directions in the subsequent description are all described from the perspective of the lawn mower 100, and the front is the forward direction of the mobile device (the direction indicated by the arrow in FIG. 1 is the forward direction).

Please refer to FIG. 1 , the cutting assembly 2 is connected with the frame body 1 . The cutting assembly 2 includes a deck 20 , at least one cutterhead 22 , a driving device 21 for driving the cutterhead 22 to rotate, and at least two blades 23 arranged on the cutterhead 22 and distributed along the circumference of the cutterhead 22 . The driving device 21 is installed on the deck 20, and the output end 210 of the driving device is connected with the cutterhead 22 to drive the cutterhead 22 to rotate, thereby driving the blade 23 arranged on the cutterhead 22 to rotate to mow the grass. Rotary knives commonly used in lawn mowers on golf courses (the blade is directly connected to the output shaft of the drive device, in order to increase kinetic energy and meet safety requirements, the cutting blade is thicker, generally 3-5mm, and most of the rotary knives are used for efficient mowing , the cutting edge will be folded into a certain angle compared with other parts of the blade), and the blade set on the cutter head is generally thinner, with simple structure, convenient processing and low cost.

In some embodiments, the blade 23 includes at least one blade with a straight cutting edge, and the thickness is designed to be 0.5mm-1mm, which is thinner than the rotary knife and takes up less installation space in the height direction. Therefore, this A lawn mower with a blade that can have a lower cutting height.

Continuing to refer to FIG. 1 , the lawn mower 100 also includes a first height-adjusting device 3 and a floating connection device 4 , one end of the first height-adjusting device 3 is connected to the frame body 1 , and the other end is pivotably connected to one end of the floating connection device 4 , and the other end of the floating connection device 4 is connected to the cutting assembly 2, so the first height-adjusting device 3 can adjust the height of the cutting assembly 2 relative to the frame body 1 by lifting the floating connection device 4 to adjust the cutting height of the blade 23.

Referring to FIG. 2 , in some embodiments, the first height adjustment device 3 includes a first crank connecting rod 31 , a second crank connecting rod 32 , and a first pivot member 33 , a second pivot member rotatably attached to the frame body 1 . Two pivot parts 34, one end of the first crank connecting rod 31 and the second crank connecting rod 32 are pivotably connected to the two ends of the first pivot part 33 respectively, and the first crank connecting rod 31 and the second crank connecting rod The other ends of the second pivot member 32 are respectively pivotally connected to two ends of the second pivot member 34 . . The first crank connecting rod 31 and the second crank connecting rod 32 are attached to the frame body 1 through the first pivot member 33 and the second pivot member 34, so that the first crank connecting rod 31 and the second crank connecting rod 32 can be opposite to each other. Pivot on frame body 1.

Referring to Fig. 2, the first height-adjusting device 3 also includes an actuating device 30, the actuating device 30 is arranged longitudinally along the fuselage of the mower 100, that is, arranged longitudinally along the forward direction of the mower 100, and one end thereof is connected to the first pivot The parts 33 are connected, and the other end is hinged with the frame body 1 . The axis directions of the first pivot member 33 and the second pivot member 34 are perpendicular to the advancing direction of the lawnmower 100 , that is, arranged laterally along the fuselage of the lawnmower 100 , and are respectively arranged on the front and rear sides of the actuator device. The first crank connecting rod 31 and the second crank connecting rod 32 are arranged longitudinally along the fuselage, and are respectively arranged on two sides of the actuating device 30 . The actuating device 30 can drive the first pivot member 33 connected thereto to rotate, thereby driving the first crank connecting rod 31 and the second crank connecting rod 32 to move. In some embodiments, the actuating device 30 includes a linear actuating part 301 and a third crank connecting rod 302, the linear actuating part 301 is hinged to the third crank connecting rod 302, and the third crank connecting rod 302 is connected to the first pivot part 33 connection, the linear movement of the linear actuating part 301 drives the third crank connecting rod 302 to drive the first pivot part 33 to rotate, thereby making the first crank connecting rod 31 and the second crank connecting rod 32 move. In some embodiments, the linear actuating part 301 adopts an electric push rod, specifically, the electric push rod includes a cylinder body (not labeled) and a push rod (not labeled) protruding from the cylinder body, etc., the electric push rod The rod adopts the prior art and will not be described in detail. The tail end of the electric push rod is hinged on the frame body 1 , and the front end (or extended end) of the electric push rod is hinged with the third crank connecting rod 302 . In other embodiments, the actuating device 30 can also use other devices, as long as it can drive the first pivot member 33 to rotate.

Referring to FIG. 2 , the ends of the first crank connecting rod 31 and the second crank connecting rod 32 are pivotably connected to one end of the floating connecting device 4 , and the other end of the floating connecting device 4 is pivotable to the deck 20 of the cutting assembly 2 When the first crank connecting rod 31 and the second crank connecting rod 32 produce vertical displacement under the action of the actuator 30, the floating connecting device 4 can drive the cutting assembly to rise in the vertical direction Or descend, thereby changing the height of the cutting assembly 2 relative to the frame body 1 .

The floating connection device 4 can change its position or posture relative to the ground under the action of external force. One end of the floating connection device is pivotally connected to the first height adjusting device 3 , and the other end is pivotally connected to the cutting assembly 2 . When the floating connection device 4 is in a tensioned state, the first height adjusting device 3 can adjust the height of the cutting assembly 2 relative to the frame body 1 through the floating connection device 4 , thereby adjusting the cutting height of the blade 23 . When the lawn mower 100 is working in the working area, when the cutting assembly 2 collides with an obstacle or the cutting assembly 2 touches the uneven ground, the floating connection device 4 can adapt to the cutting assembly 2 colliding with the obstacle or touching the ground to change Its own position or posture, so that the cutting assembly 2 can adaptively change its position relative to the obstacle or the position relative to the ground, thereby reducing the damage to the cutting assembly 2 caused by the collision, and improving the obstacle-surmounting ability and passing through of the mower 100 It can also prevent the cutting assembly from damaging the turf when the floating connection device 4 works on uneven ground.

In some embodiments, as shown in FIG. 1 , the floating connection device 4 may be a flexible connection member such as a chain structure.

In some embodiments, as shown in FIG. 3 , the floating connection device 4 includes a link part 40, and one end of the link part 40 is pivotally connected with the first height-adjusting device through a swivel pair a 41, and is movable by a moving pair 42 Connected, the other end of the link member 40 is pivotally connected with the deck 20 of the cutting assembly 2 through the swivel pair b 43. When the cutting assembly 2 bumps into an obstacle or the cutting assembly 2 touches the uneven ground, the link member 40 can adaptively change its position relative to the ground or posture, so that the cutting assembly 2 can adaptively change its position relative to obstacles or relative to the ground. In some embodiments, one end of the connecting member 40 may also be pivotally connected to the first height-adjusting device 3 , and the other end may be pivotally connected to the deck 20 of the cutting assembly 2 and be movably connected.

Referring to FIG. 1 , the lawnmower 100 further includes a ground engaging member 5 disposed at one end of the cutting assembly 2 facing the ground. When the cutting assembly 2 is sufficiently low relative to the ground, the ground engaging member may be in contact with the ground.

The lawnmower 100 has a first cutting mode (as shown in Figure 4) and a second cutting mode (as shown in Figure 1), so that the lawnmower 100 equipped with the cutting assembly 2 can meet the cutting height of the grass in different working areas. need. As shown in Figure 4, when in the first cutting mode, the first height-adjusting device 3 adjusts the height of the cutting assembly 2 relative to the frame body 1, so that the cutting assembly 2 is at a higher position from the ground. The ground is separated, and the cutting assembly 2 is suspended in the air. It is a suspended cutting. The cutting assembly 2 has a first cutting height. The lawn mower 100 can cut the semi-long grass area or the long grass area, and at this time, the floating connection device 4 is in the natural state. In the tensioned state, the first height-adjusting device 3 can further adjust the height of the cutting assembly 2 relative to the frame body 1 through the lifting and floating connection device 4, so as to realize precise control of the lawn mower 100 when working in a semi-grass area or a long grass area The cutting height of the blade 23 meets the grass height requirements of different working areas. As shown in Figure 1, in the second cutting mode, the first height-adjusting device 3 adjusts the height of the cutting assembly 2 relative to the frame body 1, so that the cutting assembly 2 is at a lower position from the ground, and at this time the ground engaging member 5 is in contact with the ground. In contact, the cutting assembly 2 is close to the ground, which is a supporting type of cutting. The cutting assembly 2 has a second cutting height, and the lawn mower 100 can cut low cutting areas such as fairways of golf courses.

Generally speaking, the first cutting height is set at 20-70mm, and the second cutting height is set at 10-15mm. It should be noted that in the actual golf course cutting, 20-70mm is the high cutting area such as the semi-long grass area and the long grass area, and 10-15mm is the low cutting area such as the fairway area. Therefore, when the mower 100 is applied to When in the golf course, it can work in the fairway area, semi-long grass area, and long grass area, without using a variety of different lawn mowers, which saves costs for the maintenance of the golf course. Of course, in other embodiments, the first cutting height and the second cutting height can also be set to other heights according to actual cutting requirements.

The mower 100 also includes a cutting control system (not shown), the cutting control system is electrically connected to the cutting assembly 2, and adjusts the height of the cutting assembly 2 relative to the frame body 1 according to the obtained grass height or the received target cutting height, Mower 100 is caused to switch between a first cutting mode (FIG. 3) and a second cutting mode (FIG. 1). In some embodiments, the actuating device 30 is an electric push rod, and the cutting control system controls the movement of the electric push rod to switch the lawn mower 100 between the first cutting mode and the second cutting mode.

The control mode of the cutting control system can be realized by using a logic circuit or an existing control chip and circuit, which will not be described in detail here. "Grass height or received target cutting height" can be a signal or command sent from outside, or obtained by a sensor on the lawn mower 100 for sensing the height of the grass in the area to be cut or the area to be cut Signal.

As shown in FIG. 1 , in the second cutting mode, the cutting assembly 2 is in contact with the ground through the ground engaging member 5 and connected with the first height adjustment device through the floating connection device 4 . Since in the second cutting mode, the cutting assembly 2 is at a lower position from the ground, it is greatly affected by obstacles or uneven ground conditions during the working process. When the lawn mower 100 is working on uneven ground conditions, the floating connection device 4 can improve the obstacle surmountability and passability of the cutting assembly 2, and the ground engaging member 5 provides support for the cutting assembly 2, which can greatly improve the cutting assembly. 2 for stability and ground following. The ground engaging member 5 combined with the change of the posture of the floating connection device 4 can make the cutting assembly 2 change its position or posture to adapt to the change of the terrain, while ensuring the consistency of the cutting height of the cutting assembly 2 on the same horizontal plane. When there are stones and other obstacles or potholes on the ground 200, since the cutting assembly 2 can float relative to the frame body 1, the rigid impact of the cutting assembly 2 can also be reduced.

In some embodiments, the ground engaging member 5 may be a rotating wheel arranged at the end of the cutting assembly 2 facing the ground and rotatably connected with the cutting assembly 2. In the second cutting mode, the rotating wheel is in contact with the ground. 2, it can rotate relative to the ground, which can reduce ground friction, improve the passability of the mower 100, and prevent the cutting assembly 2 from damaging the turf. In some embodiments, in order to better adapt to the orientation change of the lawn mower 100, the ground engaging member 5 can also be a universal wheel. When the lawn mower 100 turns, the universal wheel will follow the lawn mower 100 to turn, reducing The resistance suffered by the cutting assembly 2 when turning is small, so that the cutting assembly 2 does not need to be lifted when turning, and the cutting assembly 2 can still mow normally even during the turning process.

In some embodiments, the ground engaging member 5 can also include two different structures. For example, the ground engaging member 5 can include two universal wheels arranged at the front end of the deck 20 and a roller or a roller brush arranged at the rear end of the deck 20. Or the roller brush can not only support the cutting assembly 2 in the second cutting mode, but also sweep the broken grass scattered on the surface of the lawn to the ground below the lawn while the cutting assembly 2 is cutting the lawn, so as to ensure the orderliness of the lawn surface Beautiful, the roller can also press out uniform stripes on the lawn to improve the aesthetics of the lawn. In some embodiments, the ground engaging member 5 is composed of rollers located at the front end of the deck 20 and rollers located at the rear end of the deck 20 , and the rollers at both ends are installed on the deck 20 , wherein the rollers located at the rear end can also be called protective wheels. The roller is set to have a certain width to ensure the followability of the ground 200 and prevent grass from being gnawed. In other embodiments, the ground engaging components 5 may also be arranged on the deck 20 according to actual needs, and the number and arrangement thereof are not limited.

In some embodiments, as shown in FIG. 1 , the cutting assembly 2 also includes a second height-adjusting device configured to adjust the relative distance between the blade 23 and the output end 210 of the driving device in the vertical direction, so as to adjust the cutting height of the blade 23. high.

In some embodiments, as shown in Figure 1, the second height-adjusting device is the height-adjusting part 24 that is arranged between the cutter head 22 and the blade 23, and the height-adjusting part a 24 is vertically adjusted by adjusting the cutter head 22 and the blade 23. The relative distance in the direction is used to adjust the relative distance between the blade 23 and the output end 210 of the driving device in the vertical direction, so as to adjust the cutting height of the control blade 23 . In some embodiments, the height-adjusting part a 24 can be a spacer or a component that can increase the relative distance between the blade 23 and the cutter head 22 in the vertical direction such as a spacer.

In some embodiments, as shown in Figure 1, the second height-adjusting device is the height-adjusting part b 25 arranged at the connection between the cutterhead 22 and the output end 210 of the drive device, and the height-adjusting part b 25 adjusts the cutter head 22 and The relative distance between the output end 210 of the driving device in the vertical direction is used to adjust the relative distance between the blade 23 and the output end 210 of the driving device in the vertical direction.

In the first cutting mode, the lawn mower 100 can precisely adjust and control the cutting height of the blade 23 through the first height adjustment device 3, and in the second cutting mode, the lawn mower 100 can precisely adjust and control the cutting height of the blade 23 through the second height adjustment device 23 cutting height. Usually, the height adjustment range of the first height adjustment device 3 corresponds to the first cutting height range, generally set to 20-70mm, and the height adjustment range of the second height adjustment device corresponds to the second cutting height range, generally set 10-15mm.

In some embodiments, the cutting assembly 2 includes two cutter heads 22 , and the two cutting cutter heads 22 are arranged along the forward and rearward directions of the forward direction of the lawn mower 100 . The structure of the cutter head 22 adopts the prior art, which is not described in detail here. In other embodiments, the number of cutter heads 22 can be set according to actual needs, such as three or more. In addition, the arrangement can also be set according to cutting requirements. For example, when three cutter heads 22 are used, the arrangement is triangular .

Please refer to FIG. 1 , the lawn mower 100 also includes a traveling device 6 , which is connected to the frame body 1 and drives the cutting assembly 2 to move, so as to realize cutting in the walking area. In some embodiments, the traveling device 6 includes front wheels 1 and rear wheels 62 . Taking the advancing direction of the mower 100 as a reference direction (the direction indicated by the arrow in FIG. 1 ), the front wheel 61 is located at the front side of the rear wheel 62 , and the cutting assembly 2 is located between the front wheel 61 and the rear wheel 62 . Front wheel 61 adopts universal wheel, and trailing wheel 62 is a driving wheel. When walking, the front wheel 61 and the rear wheel 62 can rotate around their respective rotating shafts (not labeled). In other embodiments, both the front wheel 61 and the rear wheel 62 are driving wheels, or the front wheel 61 is a driving wheel and the rear wheel 62 is a universal wheel.

In some embodiments, the cutting assembly 2 has a reference plane attitude relative to the frame body 1, and the mower 100 is configured to maintain the reference plane attitude when moving from the first cutting mode to the second cutting mode, that is, as shown in FIG. 1 , When the lawn mower 100 is in the second cutting mode, its surface is the ground 200 , as shown in FIG. 3 ; when the lawn mower 100 is in the first cutting mode, its surface is parallel to the ground 200 .

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above examples only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims

A lawn mower, characterized in that the lawn mower comprises:

frame;

The cutting assembly is arranged on the frame, and the cutting assembly includes: at least one cutterhead and a driving device for driving the cutterhead to rotate, the cutterhead is connected to the output end of the driving device; At least two blades on the cutter head and distributed along the circumferential direction of the cutter head, the cutter head drives the blades to rotate for cutting;

A first height adjustment device, one end of the first height adjustment device is connected to the frame body, configured to adjust the height of the cutting assembly relative to the frame body;

A floating connection device, one end is pivotally connected to the first height-adjusting device, and the other end is pivotally connected to the cutting assembly, configured to change its own posture under the action of an external force;

a ground engaging member disposed at the ground-facing end of the cutting assembly;

The lawn mower has a first cutting mode and a second cutting mode; in the first cutting mode, the cutting assembly has a first cutting height, the ground engaging member is separated from the ground, and the floating connection is in In the tensioned state, the first height-adjusting device adjusts the height of the cutting assembly relative to the frame body by lifting the floating connection device; in the second cutting mode, the cutting assembly has a second cutting The height, where the ground engaging member is in contact with the ground, is configured to incorporate changes in the pose of the floating linkage such that the cutting assembly can change its pose to accommodate changes in terrain.
The lawnmower according to claim 1, wherein said blade comprises at least one straight cutting edge, and said blade has a thickness of 0.5mm-1mm.
The lawn mower of claim 1, wherein said ground engaging member includes a rotatable wheel that is rotatable relative to said cutting assembly, and in said second cutting mode, said rotatable wheel is in contact with the ground, When the rotating wheel is pressed by the cutting assembly, the rotating wheel is rotatable along the ground.
3. The lawn mower of claim 1, wherein said floating connection means comprises a flexible connection member.
The lawnmower according to claim 1, wherein the floating connection device comprises a link member, one end of the link member is pivotally connected and movably connected to the first height-adjusting device, and the other end is connected to the first height-adjusting device. The cutting assembly is pivotally connected, or one end of the link member is pivotally connected to the first height adjusting device, and the other end is pivotally connected to the cutting assembly and is movably connected.
The lawn mower according to claim 1, wherein the cutting assembly further comprises a second height adjusting device configured to adjust the relative distance between the blade and the output end of the driving device in the vertical direction to adjust The cutting height of the blade.
The lawnmower according to claim 6, wherein the second height-adjusting device is a height-adjusting member arranged between the cutter head and the blade, and the height-adjusting member adjusts the The relative distance between the disk and the blade in the vertical direction is used to adjust the relative distance between the blade and the output end of the driving device in the vertical direction.
The lawn mower according to claim 6, wherein the second height-adjusting device is a height-adjusting component arranged at the connection between the cutter head and the output end of the driving device, and the height-adjusting component is adjusted The vertical relative distance between the cutter head and the output end of the driving device is used to adjust the relative distance between the blade and the output end of the driving device in the vertical direction.
The lawnmower of claim 1, wherein the first height adjusting device comprises an actuator, a first crank connecting rod, a second crank connecting rod, a first pivot member, a second pivot member The actuating device is arranged longitudinally along the advancing direction of the mower, the axis direction of the first pivot member and the second pivot member is perpendicular to the advancing direction of the mower and the first pivot The shaft part and the second pivot part are rotatably attached to the frame body, one end of the actuating device is hinged to the frame body, and the other end is connected to the first pivot part; the first crank connecting rod 1. The second crank connecting rod is arranged longitudinally along the advancing direction of the lawnmower and is located on both sides of the actuating device respectively, and one end of the first crank connecting rod and the second crank connecting rod are respectively pivotally connected To the two ends of the first pivot member, the other ends of the first crank connecting rod and the second crank connecting rod are respectively pivotally connected to the two ends of the second pivot member.
The lawnmower according to claim 1, characterized in that, the first cutting height is 20-70 mm, and the second cutting height is 10-15 mm.