WO2020063609A9

WO2020063609A9 - Lawnmower

Info

Publication number: WO2020063609A9
Application number: PCT/CN2019/107650
Authority: WO
Inventors: 许海深; 山冈敏成; 杨戬
Original assignee: 南京德朔实业有限公司
Priority date: 2018-09-27
Filing date: 2019-09-25
Publication date: 2021-02-18
Also published as: WO2020063609A1

Abstract

A lawnmower (100), comprising: a blade assembly (11), configured to execute a cutting function; a chassis (12), formed with an accommodating space for accommodating at least a part of the blade assembly (11); a motor (13), configured to drive the blade assembly (11) to rotate about a rotation axis (100') as an axis; and a battery pack, configured to supply the motor (13) with a power source. The blade assembly (11) comprises a first cutting portion (111a) configured to cut grass, and a second cutting portion (112a) configured to cut grass; in a direction parallel to the rotation axis (100'), the second cutting portion (112a) is located below the first cutting portion (111a); and the battery pack comprises a battery pack casing, and a cell unit provided in the battery pack casing.

Description

Lawn mower

This application requires that the application date is September 27, 2018, the application number is 201821584956.0, the application date is November 15, 2018, the application number is 201821889111.2, the application date is April 18, 2019, the application number is 201920533524.5, the application date Priority for the Chinese patent application with the application date of April 18, 2019, the application number of 201910312144.3, the application date of June 28, 2019, the application number of 201910576318.7, and the application date of September 17, 2019, the application number of 201921545742.7 The entire content of the above application is incorporated into this application by reference.

Technical field

This application relates to an electric machine, such as a lawn mower.

Background technique

Mowing is one of the most basic operations of lawn trimming. It requires the use of simple and efficient mowing machinery to complete the mowing task with high quality and quantity. Lawnmowers have been widely used in the construction of various types of lawns. Among them, the blade of the lawnmower is a functional element. The structural design of the blade greatly affects the cutting performance of the lawnmower.

According to the energy source, the lawn mower can be divided into engine drive and motor drive. Among them, motor-driven lawn mowers generally use battery packs as energy sources, which have the advantages of less noise and cleaner. However, considering the load problem, the motor-driven lawn mower in the related art has a large load on the motor and low cutting efficiency due to unreasonable blade structure settings.

Summary of the invention

The present application provides a lawn mower with a smaller motor load and higher cutting efficiency.

[Corrected according to Rule 91 08.07.2020]
An embodiment provides a lawn mower, including: a blade assembly configured to perform a cutting function; a chassis formed with an accommodation space for accommodating at least part of the blade assembly; and a motor configured to drive the blade assembly to a rotation axis Shaft rotation; and a battery pack configured to provide a power source for the motor; wherein the blade assembly includes: a first cutting part configured to cut grass; and a second cutting part configured to cut grass; In a direction parallel to the axis of rotation, the second cutting portion is located on the lower side of the first cutting portion; the battery pack includes: a battery pack casing; and a battery cell unit disposed on the battery pack casing The body; the maximum value of the length of the line connecting any two points of the projection of the blade assembly in a plane perpendicular to the rotation axis and the projection of the rotation axis in the plane is the rotation diameter of the blade assembly; The product of the rotating diameter D (mm) of the blade assembly, the number N of battery cells contained in the battery pack, and the mass M (g) of the blade assembly is greater than or equal to 3.5×10 ⁵ (mm· g) and 7.3×10 ⁷ (mm·g) or less.

Description of the drawings

Fig. 1 is a schematic diagram of the lawn mower provided in the first embodiment;

Figure 2 is a plan view of a partial structure of the lawn mower in Figure 1;

Figure 3 is a perspective view of a partial structure of the lawn mower in Figure 1;

Figure 4 is a plan view of a partial structure of the blade assembly of the lawn mower in Figure 1;

5 is a cross-sectional view of a part of the structure of the lawn mower in FIG. 1, in which the mounting assembly is in a first mounting state;

Figure 6 is an exploded view of a partial structure of the lawn mower in Figure 1;

FIG. 7 is a schematic diagram of a part of the structure of the lawn mower provided in the first embodiment, in which the installation assembly is in a second installation state;

8 is a schematic diagram of a part of the structure of the lawn mower provided in the first embodiment, in which the installation assembly is in a second installation state;

Figure 9 is an exploded view of the blade assembly of the lawn mower in Figure 1;

Fig. 10 is a schematic diagram of the first blade and the second blade of the lawn mower in Fig. 1;

11 is a schematic diagram of a part of the structure of the lawn mower provided in the second embodiment;

12 is a schematic diagram of the blade assembly and the connecting assembly of the lawn mower provided in the third embodiment;

13 is a schematic diagram of the blade assembly of the lawn mower provided in the fourth embodiment;

Figure 14 is a plan view of the blade assembly in Figure 13;

15 is a plan view of the second blade of the blade assembly in FIG. 13;

Fig. 16 is a plan view from another perspective of the second blade of the blade assembly in Fig. 13;

17 is a schematic diagram of a part of the structure of the lawn mower provided in the fifth embodiment;

Figure 18 is a cross-sectional view of the structure in Figure 17;

Figure 19 is an exploded view of a partial structure of the lawn mower in Figure 17;

20 is a schematic diagram of a part of the structure of the lawn mower provided in the sixth embodiment;

21 is a plan view of the blade assembly and mounting assembly of the lawn mower provided in the sixth embodiment;

Figure 22 is an exploded view of a partial structure of the lawn mower in Figure 20;

23 is a schematic diagram of a part of the structure of the lawn mower provided in the seventh embodiment;

Figure 24 is a cross-sectional view of the structure in Figure 23;

Figure 25 is an exploded view of the structure in Figure 23;

26 is a schematic diagram of a part of the structure of the lawn mower provided in the eighth embodiment;

Fig. 27 is a schematic diagram of a lawn mower connected with a grass pressing component provided in the ninth embodiment;

Figure 28 is a perspective view of the grass pressing assembly in Figure 27;

Figure 29 is a plan view of the grass pressing component in Figure 27;

Figure 30 is a cross-sectional view of the grass pressing assembly in Figure 27;

Figure 31 is a schematic diagram of a grass pressing component connected to a lawn mower provided in the tenth embodiment;

Figure 32 is a perspective view of the lawn mower provided in the eleventh embodiment;

Figure 33 is a bottom view of the lawn mower in Figure 32;

Figure 34 is a circuit system diagram of the lawn mower in Figure 32;

35 is a schematic diagram of the connection between the first signal line of the lawn mower in FIG. 32 and the first output circuit board and the second output circuit board;

Figure 36 is a circuit system diagram of the lawn mower provided in the twelfth embodiment;

Fig. 37 is a schematic diagram of a partial structure of the lawn mower in Fig. 32;

Figure 38 is a perspective view of the chassis in the lawn mower in Figure 32;

Figure 39 is a plan view of the chassis in Figure 38;

Figure 40 is a cross-sectional view of the chassis in Figure 39 along the line V-V;

Figure 41 is a perspective view of the chassis in Figure 38 when a plug is connected;

42 is a schematic diagram of the lawn mower provided in the thirteenth embodiment;

Figure 43 is a perspective view of the lawn mower in Figure 42;

Figure 44 is a plan view of the blade assembly of the lawn mower in Figure 42;

Figure 45 is an exploded view of the blade assembly in Figure 44;

Figure 46 is a plan view of a partial structure of the blade assembly in Figure 45;

Fig. 47 is a schematic diagram of a lawn mower provided in the fourteenth embodiment;

Figure 48 is a perspective view of the blade assembly of the lawn mower in Figure 47;

Figure 49 is a plan view of the blade of the blade assembly in Figure 48;

Figure 50 is a sectional view of the blade in Figure 49;

Fig. 51 is a schematic diagram of a blade assembly of a lawn mower provided in the fifteenth embodiment;

Fig. 52 is a plan view of the blade of the blade assembly in Fig. 51;

detailed description

Example one

Fig. 1 is a schematic diagram of a lawn mower 100 provided in Embodiment 1 of the application. According to a user's operation mode, the lawn mower 100 in this application may be a hand-push lawn mower or a riding lawn mower. In this embodiment, a hand-push lawn mower driven by a motor is taken as an example for description. All "components" in this application refer to a combination that includes at least one component, and this combination achieves a specific function through interaction or cooperation . In order to facilitate the description of the technical solution of the present application, the vertical direction as shown in FIG. 1 is set.

As shown in FIGS. 1 to 3, the lawn mower 100 includes a blade assembly 11, a chassis 12, a motor 13, and a battery pack. The blade assembly 11 is configured to perform the cutting function of the lawn mower 100; the chassis 12 is formed with an accommodation space for accommodating at least part of the blade assembly 11. In this embodiment, the blade assemblies 11 are all located inside the accommodation space; the motor 13 drives the blade assembly 11 to rotate The axis 100' is a shaft rotation, and the motor 13 is located above the chassis 12 and forms a coaxial rotation with the blade assembly 11 taking the rotation axis 100' as the axis. In an embodiment, the motor 13 includes a motor shaft, and the lawn mower 100 further includes a drive shaft 14 that drives the blade assembly 11 to rotate. The drive shaft 14 may be a motor shaft. A transmission mechanism may also be provided between the motor 13 and the blade assembly 11 The transmission is performed so that the motor 13 and the drive shaft 14 form a non-coaxial rotation. The battery pack provides a power source for the motor 13. The lawn mower 100 also includes a fan 15 connected to the drive shaft 14; the fan 15 rotates about an axis parallel or coincident with the rotation axis 100'.

When the motor 13 is started to drive the blade assembly 11 to rotate about the axis of rotation 100' and the linear velocity of the blade assembly 11 is greater than or equal to 40m/s and less than or equal to 100m/s, the battery pack consumes 100WH of energy and the lawnmower 100 The working time is defined as the 100Wh battery life of the lawn mower 100, and the 100Wh battery life of the lawn mower 100 is greater than or equal to 4min and less than or equal to 30min; in one embodiment, the 100Wh battery life of the lawn mower 100 It is greater than or equal to 5 minutes and less than or equal to 20 minutes; in other embodiments, the hectowatt-hour battery life of the lawn mower 100 is greater than or equal to 6 minutes and less than or equal to 15 minutes. In this embodiment, the lifetime of the lawn mower 100 is about 12 minutes per 100 watt hour. Since the lawn mower 100 in this embodiment has a better structural design, a smaller load, and a higher cutting efficiency blade assembly 100, the lawn mower 100 has a life time of 100 watt-hours in the above range during operation, thereby making the cutting The grass machine 100 has high cutting performance. The battery pack here only refers to a battery pack that provides electrical energy for the motor 13 that drives the blade assembly 11 to rotate.

In addition, when the motor 13 drives the blade assembly 11 to rotate around the axis of rotation 100' with no load, the battery pack consumes 100WH of energy and the working time of the lawn mower 100 is defined as the no-load life time of the lawn mower 100. The no-load endurance time is greater than or equal to 9 min and less than or equal to 35 min; in one embodiment, the no-load endurance time of the lawn mower 100 is greater than or equal to 12 minutes and less than or equal to 33 minutes; in other embodiments, the no-load endurance time of the lawn mower 100 18min or more and 30min or less. In this embodiment, the no-load endurance of the lawn mower 100 is about 22 minutes. Since the lawn mower 100 in this embodiment has a better structural design, a smaller load, and a higher cutting efficiency blade assembly 100 and a reasonable setting of no-load conditions, the lawn mower 100 has the above-mentioned range of no-load during operation. Life time, so that the working performance of the lawn mower 100 is better.

As shown in FIGS. 2 to 5, the blade assembly 11 includes a first blade 111 and a second blade 112. The first blade 111 and the second blade 112 are respectively formed with a first cutting portion 111a and a second cutting portion configured to cut grass. 112a. When the whole formed by the first blade 111 and the second blade 112 rotates around the rotation axis 100' as an axis, the first cutting portion 111a and the second cutting portion 112a cut grass. In this embodiment, the cutting part refers to a structure with cutting function for cutting vegetation, and it may be a common cutting part or a cutting structure different from the cutting part. A cutting part refers to an integral or continuous structure.

In a direction parallel to the rotation axis 100', the second cutting portion 112a is located below but not limited to directly below the first cutting portion 111a; or the second cutting portion 112a and the first cutting portion 111a are at least partially located in the same plane. In this implementation, the first blade 111 and the second blade 112 are two blades formed separately, and the first blade 111 is located above the second blade 112 relative to the ground in a direction parallel to the rotation axis 100'. The first blade 111 and the second blade 112 form a synchronous rotation. As shown by the arrow in FIG. 2, the first blade 111 and the second blade 112 rotate coaxially and synchronously around the rotation direction A with the rotation axis 100' as the axis.

The lawn mower 100 also includes a control system configured to control the operation of the motor 13. When the lawn mower 100 is under no load, the sum of the input power of the motor 13, the input power of the control system, and the input power of the blade assembly 11 is the lawn mower 100 The no-load input power is greater than or equal to 100W and less than or equal to 380W. In this embodiment, the no-load input power is greater than or equal to 200W and less than or equal to 300W.

In one embodiment, idling refers to that the blade assembly 11 of the lawn mower 100 rotates at a preset speed under atmospheric pressure, and the blade assembly 11 has no external load.

Define the volume of the smallest cylinder 11' that wraps the first blade 111 and the second blade 112 as the sweep volume of the blade assembly 11. When the blade assembly 11 rotates around the rotation axis 100', the first cutting part 111a and the second cutting The portions 112a are all located in the space surrounded by the smallest cylinder 11'. As shown in Fig. 2, the rectangle indicated by the dashed line is a plan view of the cylinder 11' wrapping the first blade 111 and the second blade 112 in this embodiment. The sweep volume of the blade assembly 11 is the volume of the cylinder 11'. The volume of the cylinder 11' is approximately the diameter D of the blade assembly 11 (refer to FIG. 4), and the blade assembly 11 is parallel or coincident with The maximum height in the direction of the rotation axis 100' is the volume of the tall cylinder 11'. The rotation diameter D of the blade assembly 11 is the maximum length of a line connecting any two points of the projection of the blade assembly 11 in a plane perpendicular to the rotation axis 100' and the projection of the rotation axis 100' in the plane. In this embodiment, since the first blade 111 and the second blade 112 are both perpendicular to the rotation axis 100' and the first blade 111 and the second blade 112 are coaxially mounted to the drive shaft 14, the first blade 111 is located on the side of the second blade 112 Right above, the sweep volume of the blade assembly 11 is about the radius of the maximum distance from any point on the blade assembly 11 to the rotation axis 100', and the first blade 111 and the second blade 112 are along the direction parallel to the rotation axis 100' The maximum value of the sum of heights is the volume of the tall cylinder 11'. In an embodiment, the heights of the first blade 111 and the second blade 112 are respectively the maximum dimensions of the first blade 111 and the second blade 112 in a direction parallel to the rotation axis 100' when the blade assembly 11 is installed on the drive shaft 14.

In this embodiment, the blade assembly 11 is greater than the swept volume of 400cm ³ and equal to or less 8000cm ^3. When the sweep volume of the blade assembly 11 is kept within this range, the lawn mower 100 has a smaller load, or in other words, when the sweep volume of the blade assembly 11 is kept within this range, the lawn mower 100 has a smaller load. At the same time, the double blades ensure the cutting performance of the lawn mower 100, thereby enabling the lawn mower 100 to have a higher cutting efficiency. In this embodiment, the sweep volume of the blade assembly 11 is greater than or equal to 600 cm ³ and less than or equal to 6800 cm ^3. In one embodiment, the sweep volume of the blade assembly 11 is greater than or equal to 1000 cm ³ and less than or equal to 5000 cm ³ .

The structure of the blade assembly is not limited to the structure in this embodiment. In one embodiment, the blade assembly may include only one blade; the first cutting part and the second cutting part are both provided on the blade, and in the direction of the axis of rotation, the second The cutting part is located below but not limited to directly below the first cutting part; the first cutting part and the second cutting part may be integrally formed or connected with other structures to form a complete blade. For example, the blade assembly includes a blade body, the first cutting part and the second cutting part are respectively provided on a plurality of fins extending from the blade body, and the plurality of fins are fixedly connected with the blade body or integrally formed or detachably connected.

As shown in FIG. 4, the phase angle α formed by the first cutting portion 111a and the second cutting portion 112a is greater than or equal to 0 and less than 90 degrees. The phase angle α is the angle between the projection of the edge 111b of the first cutting portion 111a and the edge 112b of the second cutting portion 112a in a plane perpendicular to the rotation axis 100'. The blade edge 111b of the first cutting portion 111a is the edge that constitutes the foremost side of the first cutting portion 111a, that is, when the first blade 111 rotates along the rotation direction A with the rotation axis 100' as the axis, the edge that first contacts the vegetation ; Similarly, the edge 112b of the second cutting portion 112a constitutes the foremost edge of the second cutting portion 112a, that is, when the second blade 112 rotates along the rotation direction A with the rotation axis 100' as the axis, the first contact To the side of the vegetation. When the phase angle of the first cutting part 111a and the second cutting part 112a is within the above range, the first cutting part 111a and the second cutting part 112a as a whole have a higher cutting efficiency. In an embodiment, the phase angle α formed by the first cutting portion 111a and the second cutting portion 112a is greater than or equal to 10 degrees and less than or equal to 60 degrees. In this embodiment, the phase angle α formed by the first cutting portion 111a and the second cutting portion 112a is about 20 degrees.

The first blade 111 includes at least one first cutting portion 111 a, and the first cutting portion 111 a can be considered as a continuous cutting portion formed on the first blade 111. In an embodiment, the first blade 111 and the second blade 112 respectively include at least two first cutting portions 111a and at least two second cutting portions 112a. In this embodiment, two first cutting portions 111a are formed on the first blade 111, and the two first cutting portions 111a are respectively provided at both ends of the first blade 111, and both are provided on the front side of the rotation direction A. That is, when the first blade 111 rotates along the rotation direction A with the rotation axis 100' as the axis, the side that first contacts the vegetation; the two first cutting portions 111a are center-symmetric about the rotation axis 100'. Similarly, the second blade 112 also includes at least one second cutting portion 112a. In this embodiment, the second blade 112 is formed with two second cutting portions 112a, and the two second cutting portions 112a are respectively provided on the second blade 112. Both ends are arranged on the front side of the rotation direction A, that is, when the second blade 112 rotates along the rotation direction A with the rotation axis 100' as the axis, the side that first contacts the vegetation; two second cutting parts 112a It is symmetric about the center of the rotation axis 100'.

It is defined that the sum of the number of first cutting parts 111a formed by the first blade 111 and the number of second cutting parts 112a formed by the second blade 112 (in units) is the number of cutting parts of the blade assembly 11. For the blade in this embodiment In the component 11, the ratio of the sweep volume of the blade component 11 to the number of cutting parts is greater than or equal to 50 cm ³ /piece and less than or equal to 4000 cm ³ /piece. In one embodiment, the ratio of the sweep volume of the blade assembly 11 to the number of cutting parts is greater than or equal to 75 cm ³ /piece and less than or equal to 3400 cm ³ /piece. In one embodiment, the first cutting portion 111a with discontinuous structure is regarded as a plurality of different first cutting portions 111a, and the number of the first cutting portions 111a is the discontinuous first cutting portions 111a provided on the first blade 111. The number of a cutting portion 111a; similarly, the second cutting portion 112a with a discontinuous structure is regarded as a plurality of different second cutting portions 112a, and the number of the second cutting portions 112a is the number of the second cutting portions 112a arranged on the second blade 112. The number of discontinuous second cutting portions 112a. In this embodiment, the ratio of the sweep volume of the blade assembly 11 to the number of cutting parts is about 1700 cm ³ /piece. The more the number of cutting parts, the better the cutting performance of the lawn mower 100, but the more the number of cutting parts, the larger the sweep volume requirement of the blade assembly 11, and the load of the lawn mower 100 will increase accordingly. In this embodiment, by optimizing the structure of the blade assembly 11, the ratio of the sweep volume of the blade assembly 11 to the number of cutting parts is kept within the above-mentioned preferred range, thereby ensuring that the lawn mower 100 maintains a better cutting performance under the condition of a small load. performance.

As shown in FIG. 5, the lawn mower 100 further includes a mounting assembly 16, which has a first mounting state where the blade assembly 11 is mounted to the drive shaft 14 so that the blade assembly 11 rotates with the drive shaft 14 and the first blade 111 One of the second blades 112 and the second blade 112 are detached, and only the other one of the first cutting portion 111a and the second cutting portion 112a is installed to perform the second installation state of the cutting function.

In this embodiment, as shown in FIGS. 5 to 8, since the first cutting portion 111a and the second cutting portion 112a are respectively provided on the first blade 111 and the second blade 112 formed separately, the mounting assembly 16 has a The blade assembly 11 is installed to the drive shaft 14 in a first installation state in which the blade assembly 11 rotates with the drive shaft 14 and one of the first blade 111 and the second blade 112 is removed and only the first blade 111 and the second blade are installed The other one of 112 is to perform the second installation state of the cutting function. In other words, the mounting assembly 16 can mount the blade assembly 11 including the first blade 111 and the second blade 112 to the drive shaft 14 in the first mounting state, and can also include only the first blade in the second mounting state. The blade assembly 11 of one of 111 and the second blade 112 is mounted to the drive shaft 14. Taking into account the diversity of operating conditions, the mounting assembly 16 in this embodiment has multiple mounting states, so it has better adaptability, enabling users to reduce or increase the number of blades according to specific needs without the need to replace the mounting assembly as a whole 16 and the blade assembly 11, thereby enhancing the practicality of mowing.

In one embodiment, the mounting assembly 16 has a first mounting state for mounting the first type blade assembly including the first cutting part and the second cutting part to the drive shaft. The second type blade assembly containing only one cutting part can be installed to the second installation state of the drive shaft. Based on the structure that the first cutting part and the second cutting part are respectively arranged on the first blade and the second blade, that is to say, the mounting assembly has the function of mounting the first type of blade assembly including the first blade and the second blade to In the first installation state of the drive shaft, the mounting assembly also has a second installation state in which the second type blade assembly containing only one blade can be installed to the drive shaft when the first type blade assembly is removed. In other words, the mounting assembly 16 can not only independently install one or both of the first blade and the second blade, but also independently install other blades that do not belong to the first blade and the second blade.

In an embodiment, the lawn mower includes a first-type blade assembly that performs a cutting function, the first-type blade assembly includes a first blade, and the first blade is formed with a first cutting portion configured to cut grass. The mounting assembly has a first mounting state in which the first type of blade assembly is mounted to the drive shaft so that the blade assembly rotates with the drive shaft; the mounting assembly also has a second type that includes two cutting parts by removing the first type of blade assembly The blade assembly is installed to the drive shaft to perform the second installation state of the cutting function; wherein, the two cutting parts of the second type of blade assembly are respectively located on the upper and lower sides in the direction of the rotation axis. In other words, the mounting assembly makes the lawn mower switch from the first type blade assembly with one cutting part to the second type blade assembly with two cutting parts, and the two cutting parts are respectively located in the direction along the axis of rotation. The upper and lower sides. In an embodiment, the second type of blade assembly may include the first cutting portion of the first type of blade assembly, or may not include the first cutting portion of the first type of blade assembly, but is formed completely different from the first type of blade assembly. The second type of blade assembly. When the second type of blade assembly includes the first cutting part of the first type of blade assembly, the position of the first cutting part relative to the drive shaft may be unchanged or changed. For example, the first type of blade assembly includes a first blade provided with a first cutting part, and the second type of blade assembly adds a second blade provided with a second cutting part to the first type of blade assembly, and the second The blade is installed to the lower side or the upper side of the first blade through the mounting assembly along the rotation axis direction.

In an embodiment, the lawn mower includes a blade assembly and a lawn mower body. The lawn mower body includes a chassis, a motor, and a battery pack. The motor is mounted on the chassis, and the battery pack provides power to the motor. The blade assembly includes a first type of blade assembly and a second type of blade assembly. The motor drives the first type of blade assembly or the second type of blade assembly to rotate about the axis of rotation; the first type of blade assembly includes a first blade, and the first blade is formed with A first cutting part for mowing; the second type of blade assembly includes a first blade and a second blade, the first blade is formed with a first cutting part for mowing; the second blade is formed with a second cutting part configured for mowing; Wherein, in the direction along the rotation axis, the second cutting part is located below the first cutting part; the main body of the lawn mower can be adapted to the first type blade assembly or the second type blade assembly. The main body of the lawn mower may be adapted to install the second type of blade assembly after the first type of blade assembly is disassembled, or may be adapted to install the first type of blade assembly when the second type of blade assembly is disassembled.

The blade assembly 11 in this embodiment is driven by friction, and the mounting assembly 16 includes a driving member 161. The driving member 161 is configured to drive the blade assembly 11 to rotate about the rotation axis 100'. The driving member 161 is connected to the driving shaft 14 and is driven. The shaft 14 is driven, and the drive member 161 and the blade assembly 11 are driven by static friction. In one embodiment, as shown in FIGS. 5 and 6, the driving member 161 is a flange, and the flange and the driving shaft 14 form a fixed connection along the radial direction, and the blade assembly 11 is in a plane perpendicular to the rotation axis 100' Make face contact with flange. The mounting assembly 16 further includes a pressing assembly 162, which is configured to press the blade assembly 11 to the surface of the driving member 161 along the direction of the rotation axis 100'. The pressing assembly 162 is mounted to the drive shaft 14 and is connected to the drive shaft 14. A fixed and detachable connection is formed in the direction along the rotation axis 100'. In one embodiment, the drive shaft 14 and the flange form a flat fit, and the pressing assembly 162 includes a bolt 162a and a first gasket 162b. The flange, the blade assembly 11, the first gasket 162b and the bolt 162a are tightly attached from top to bottom along the rotation axis 100', wherein the flange, the blade assembly 11 and the first gasket 162b are sleeved to the drive shaft 14, and the bolt 162a Inserted into the drive shaft 14 to form a threaded connection with the drive shaft 14.

As shown in FIG. 5, when the mounting assembly 16 is in the first mounting state, the bottom surface of the driving member 161 is close to the upper surface of the blade assembly 11. The first gasket 162b and the drive shaft 14 also form a flat fit.

As shown in Figures 7 and 8, the mounting assembly 16 is in the second mounting state. In FIG. 7, only the first blade 111 is mounted to the drive shaft 14 through the mounting assembly 16. In this embodiment, a second washer 162c is added to fix the position of the first blade 111 relative to the drive shaft 14 along the rotation axis 100'. . As shown in FIG. 8, the mounting assembly 16 further includes a fan 15. The fan 15 is fixedly connected to the driving part 161 and sleeved outside the driving part 161, and forms a coaxial connection with the driving part 161. The fan 15 is driven by the driving member 161, and the driving member 161 is formed with a driving portion 161a (as shown in FIG. 5) for driving the fan 15, and the driving portion 161a protrudes from the driving member 161 in the radial direction. The fan 15 is formed with a driving portion 161a. Form a tightly fitting groove. Along the rotation axis 100' direction, the lower surface of the fan 15 is located below the lower surface of the driving member 161. When only the first blade 111 or the second blade 112 is mounted to the drive shaft 14, the fan 15 and the blade assembly 11 form a surface contact , The lower surface of the fan 15 is against the upper surface of the blade assembly 11, and the fan 15 and the blade assembly 11 constitute a friction drive. In an embodiment, the connection between the mounting assembly 16 and the blade assembly 11 can use the connection methods in the above two embodiments at the same time, that is, the mounting assembly 16 presses the first blade 111 or the second blade 112 through the pressing assembly 162. , The pressing assembly 162 includes a fan 15 and a second gasket 162c.

In one embodiment, the structure of the mounting assembly 16 and the connection between the mounting assembly 16 and the blade assembly 11 are not limited to the above several embodiments. For example, when the mounting assembly 16 is in the second mounting state, a thickness greater than that of the first gasket is used. The second gasket 162c of 162b replaces the first gasket 162b; as long as other simple adjustments or replacements are made on the basis of the installation assembly 16 of the present application, the installation state switching can be realized, shall be considered to be within the protection scope of the present application . The mounting assembly 16 may include multiple components. When the mounting assembly 16 is in the first and second mounting states, the mounting assembly 16 may include different components.

The driving member 161 and the blade assembly 11 form a surface contact in a plane perpendicular to the rotation axis 100'; the contact area between the driving member 161 and the blade assembly 11 is greater than or equal to 100 mm ² and less than or equal to 1000 mm ² . In one embodiment, the contact area between the driving member 161 and the blade assembly 11 is greater than or equal to 300 mm ² and less than or equal to 500 mm ² . In this embodiment, the contact area between the flange and the blade assembly 11 is about 432 mm ² , and the contact area between the lower surface of the flange and the upper surface of the blade assembly 11 is about 432 mm ² . Correspondingly, when the mounting assembly 16 is in the second mounting state and the fan 15 and the blade assembly 11 form a friction transmission, the fan 15 and the blade assembly 11 form a surface contact in a plane perpendicular to the rotation axis 100'; the fan 15 and the blade assembly 11 The contact area is greater than or equal to 100mm ² and less than or equal to 1000mm ² .

As shown in FIGS. 4 to 6 and 9, the blade assembly 11 is formed with at least one mounting hole 113 that cooperates with the drive shaft 14. In this embodiment, when the blade assembly 11 forms a unit that can move together, the blade assembly 11 is formed with only one mounting hole 113 that cooperates with the drive shaft 14 to facilitate user installation. The mounting hole 113 is roughly located at the center of the blade assembly 11, and the blade assembly 11 is center-symmetric with respect to the center of the mounting hole 113, so that the blade assembly 11 rotates more stably about the rotation axis 100' and avoids eccentric torque. In one embodiment, the first blade 111 and the second blade 112 are respectively formed with a first mounting hole 113a and a second mounting hole 113b. When the blade assembly 11 is mounted to the drive shaft 14, the first mounting hole 113a and the second mounting hole 113a The mounting holes 113b overlap up and down along the direction of the rotation axis 100'. In an embodiment, the blade assembly 11 is formed with a plurality of mounting holes 113, and the mounting assembly 16 correspondingly includes a plurality of connecting shafts that cooperate with the mounting holes 113, and the connecting shafts are connected to the driving shaft 14.

As shown in FIG. 5, the mounting assembly 16 contacts the blade assembly 11 to form at least one mounting surface 16a substantially perpendicular to the rotation axis 100'; when the blade assembly 11 is cut, at least one cutting surface 11a perpendicular to the rotation axis 100' is formed; at least A mounting surface 16a is located above the cutting surface 11a along the direction of the rotation axis 100'. In this embodiment, the flange of the mounting assembly 16 or the fan 15 and the first gasket 162b form a surface contact with the blade assembly 11 and form two upper and lower mounting surfaces 16a perpendicular to the rotation axis 100'; when the blade assembly 11 includes a first When a blade 111 or a second blade 112 is used, the first blade 111 or the second blade 112 rotates about the axis of rotation 100' to form a cutting surface 11a, and the plane of the cutting surface 11a is the edge 111b of the first cutting portion 111a or The plane where the edge 112b of the second cutting portion 112a is located; when the blade assembly 11 includes a first blade 111 and a second blade 112, the first blade 111 and the second blade 112 rotate around the rotation axis 100' to form two upper and lower blades. The planes of the parallel cutting surface 11a and the upper and lower cutting surfaces 11a are the planes where the edge 111b of the first cutting portion 111a and the edge 112b of the second cutting portion 112a are located, respectively. In this embodiment, one mounting surface 16a is located above the two cutting surfaces 11a along the direction of the rotation axis 100', avoiding the installation of the mounting assembly 16 below the cutting surface 11a. In this embodiment, the driving member 161 for driving the rotation of the blade assembly 11 is located above the cutting surface 11a.

As shown in FIG. 9, the blade assembly 11 also includes a connecting assembly 114, which connects the second blade 112 to the first blade 111 so that the blade assembly 11 forms a unit that can move together when it is not mounted on the drive shaft 14; After the connecting assembly 114 connects the second blade 112 to the first blade 111, the second cutting portion 112a and the first cutting portion 111a are located at different axial positions in the direction along the rotation axis 100'. That is to say, when the first blade 111 and the second blade 112 are not integrally formed, the first blade 111 and the second blade 112 are connected as a whole through the connecting assembly 114. When the first blade 111 and the second blade 112 are not mounted to the drive shaft 14, the first blade The connection between 111 and the second blade 112 may be fixed or movable, and the first blade 111 may move relative to the second blade 112. When the blade assembly 11 is mounted to the drive shaft 14 and performs cutting as a whole, the first blade 111 is fixed relative to the second blade 112. At the same time, the connecting assembly 114 determines the relative position of the first cutting portion 111a and the second cutting portion 112a along the rotation axis 100'. In one embodiment, the first cutting portion 111a is located above the second cutting portion 112a. In the embodiment, the first blade 111 is located above the second blade 112. The connecting assembly 114 enables the blade assembly 11 to be disassembled and assembled by the user as a whole, which facilitates the operation. At the same time, it also fixes the relative axial positions of the first cutting part 111a and the second cutting part 112a, avoiding the user from cutting the two cutting parts during assembly. The re-positioning of the part in the axial direction also avoids that the user installs the first blade 111 and the second blade 112 upside down or incorrectly, which plays a foolproof effect.

When the connecting assembly 114 connects the second blade 112 to the first blade 111, the second blade 112 is fixed within a preset angle range relative to the first blade 111. In one embodiment, the preset angle range is greater than or equal to 0 degrees and less than It is equal to 20 degrees. In this embodiment, the preset angle range is greater than or equal to 5 degrees and less than or equal to 10 degrees. That is to say, the connecting assembly 114 connects the first blade 111 and the second blade 112, so that the first blade 111 and the second blade 112 form a fixed connection or movable connection in the rotation axis. When the first blade 111 and the second blade When 112 forms an axial movable connection, the first blade 111 can rotate relative to the second blade 112 by a rotation angle greater than or equal to 0 degrees and less than or equal to 10 degrees. The first blade 111 and the second blade 112 form a detachable connection through the connecting assembly 114, which facilitates the maintenance or replacement of the blade assembly 11 later.

In this embodiment, the connecting component 114 is a common fastener, such as a bolt and a nut or a screw and a nut. The blade assembly 11 is formed with at least one positioning portion 115 connected to the connecting assembly 114, the positioning portion 115 can define the range of the phase angle of the first blade 111 relative to the second blade 112, and the connecting assembly 114 is installed to the positioning portion 115. In this embodiment, the positioning portion 115 is a positioning hole, and positioning holes are formed on the first blade 111 and the second blade 112. The number of positioning portions 115 is not limited. In this embodiment, the number of positioning portions 115 is greater than Equals two. In an embodiment, the first blade 111 is formed with two diamond-shaped holes symmetrical about the rotation axis 100', and the second blade 112 is formed with two circular holes symmetrical about the rotation axis 100', the diamond-shaped hole and the bolt head The round hole is matched with the stud of the bolt, the bolt and the nut are matched and locked, so that the first blade 111 and the second blade 112 form a fixed phase angle in the circumferential direction and a fixed relative position in the axial direction. connection. In an embodiment, the positioning hole may also be a square hole or a waist-shaped hole or other shapes; the positioning hole on the first blade 111 and the positioning hole on the second blade 112 and the connection assembly 114 are not limited here.

The connecting assembly 114 includes a mating portion 114 a that cooperates with the positioning portion 115. In this embodiment, the positioning portion 115 is a positioning hole, and the matching portion 114a is a bolt, and is a screw rod of the bolt, and the positioning hole forms a shaft hole to fit. The connecting assembly 114 further includes an axial fixing part for fixing the position of the first blade 111 relative to the second blade 112 in a direction parallel to the rotation axis 100', and the axial fixing part is a bolt and a nut. In an embodiment, the axial fixing portion may be a magnetic element mounted to the first blade 111 and the second blade 112, and the axial position of the first blade 111 relative to the second blade 112 is fixed by magnetic attraction. The specific structure of the fitting portion 114a and the axial fixing portion is not limited to the above-mentioned manner.

In one embodiment, the mating part of the connecting component is arranged on a fan or a flange or other mounting parts, and forms a fixed connection or integrally formed with the fan and the flange and other mounting parts. For example, a driving part is formed at the lower end of the fan, and the driving part is configured to install and position the blade assembly. In an embodiment, the connecting assembly further includes a pressing member for axially clamping the blade assembly, and the pressing member is connected to the blade assembly and forms surface contact with the blade assembly. In this case, the blade assembly can either form a friction drive with the drive shaft or form a mechanical positioning drive, such as a flat position.

As shown in Figures 4, 5 and 10, the positioning portion 115 roughly has a geometric center. The distance from the geometric center to the axis of rotation 100' is the positioning radius r. The positioning radius r is greater than or equal to 0 mm and less than or equal to 50 mm. In an example, the positioning radius r of the positioning portion 115 is greater than or equal to the radius of the drive shaft 14 and less than or equal to 50 mm; in this embodiment, the positioning radius r of the positioning portion 115 is about 30 mm. When the positioning radius r of the positioning portion 115 is 0 mm, that is, the geometric center of the positioning portion 115 coincides with the rotation axis 100'. In one embodiment, a radial slot is defined on the drive shaft 14, and the slot can accommodate the positioning portion 115. The positioning portion 115 is arranged outside the drive shaft 14, that is, the positioning radius r of the positioning portion 115 is greater than or equal to the radius of the drive shaft 14. For the positioning portion 115 with a regular shape, the geometric center is uniquely determined. For the positioning portion 115 with an irregular shape, a point at the center of the positioning portion 115 can be roughly determined as the geometric center. In one embodiment, the ratio of the rotation diameter D of the blade assembly 11 to the positioning radius r of the positioning portion 115 is greater than or equal to 5 and less than or equal to 25. When the position of the positioning portion 115 is within the above range, the positioning effect of the positioning portion 115 Better. The rotating diameter D is greater than or equal to 200 mm and less than or equal to 700 mm.

In an embodiment, the positioning hole may be another positioning hole with an incomplete positioning effect, such as an elliptical hole. The positioning hole can restrict to a preset degree but cannot completely restrict the rotation of the first blade 111 relative to the second blade 112 , So that the blade assembly 11 has a preset adjustment space when encountering obstacles, thereby enhancing the service life of the blade assembly 11.

The maximum length of the line connecting any two points in the plane perpendicular to the rotation axis 100' of the first blade 111 in the direction perpendicular to the rotation diameter D1 of the first blade 111 is the width W1 of the first blade 111. The ratio of the rotation diameter D1 of 111 to the width W1 of the first blade 111 is greater than or equal to 5 and less than or equal to 13; the projection of the second blade 112 in a plane perpendicular to the rotation axis 100' is in the direction perpendicular to the rotation diameter D2 of the second blade 112 The maximum length of the line connecting any two points is the width W2 of the second blade 112, and the ratio of the rotation diameter D2 of the second blade 112 to the width W2 of the second blade 112 is greater than or equal to 5 and less than or equal to 13. In this embodiment, the rotation diameter D1 of the first blade 111 is about 511 mm, the width W1 of the first blade 111 is about 51 mm, and the rotation diameter D2 of the second blade 112 is approximately equal to the rotation diameter D1 of the first blade 111. The width W2 of 112 is approximately equal to the width W1 of the first blade 111.

As shown in FIGS. 9 and 10, at least one reinforcing rib 116 is formed on the surfaces of the first blade 111 and the second blade 112 respectively. In this embodiment, the first blade 111 and the second blade 112 are respectively formed with two reinforcing ribs 116. The two reinforcing ribs 116 on the surface of the first blade 111 protrude upward and extend along the length direction of the first cutting portion 111a. The rotation axis 100' is symmetrical; the two reinforcing ribs 116 on the surface of the second blade 112 protrude downward, extend along the length direction of the second cutting portion 112a and are symmetrical about the rotation axis 100'. The shape of the rib 116 is a long strip. The ratio of the rotational diameter D1 of the first blade 111 to the length a1 of the single rib 116 is greater than or equal to 2.5 and less than or equal to 10; the ratio of the rotational diameter D1 of the first blade 111 to the total length of the plurality of ribs 116 is greater than or equal to 1.3 and less than Equal to 5; the ratio of the width W1 of the first blade 111 to the width b1 of the single rib 116 is greater than or equal to 2 and less than or equal to 5. Similarly, the ratio of the rotation diameter D2 of the second blade 112 to the length a1 of the single rib 116 is greater than or equal to 2.5 and less than or equal to 10; the ratio of the rotation diameter D2 of the second blade 112 to the total length of the plurality of ribs 116 is greater than or equal to 1.3 and less than or equal to 5; the ratio of the width W2 of the second blade 112 to the width b1 of the single rib 116 is greater than or equal to 2 and less than or equal to 5. In one embodiment, the length a1 of the rib 116 refers to the maximum dimension of the projection of the rib 116 in a plane perpendicular to the rotation axis 100' in the extending direction of the rib 116, and the width b1 of the rib 116 refers to the reinforcement The projection of the rib 116 in a plane perpendicular to the rotation axis 100 ′ is the largest dimension perpendicular to the extending direction of the reinforcing rib 116. In the extension direction of the first blade 111 or the second blade 112 and in the direction perpendicular to the extension direction of the first blade 111 or the second blade 112, the ribs 116 are distributed in the middle position of the first blade 111 and the second blade 112 ; To enhance the strength of the first blade 111 or the second blade 112. In other embodiments, the number, position and specific shape of the reinforcing rib 116 are not limited thereto.

In this embodiment, the first blade 111 basically extends along the first straight direction; the second blade 112 basically extends along the first curved direction. Since the first blade 111 is arranged above the second blade 112 in the direction of the rotation axis 100', and the first curve is at least partially bent downward, a sufficient accommodation space is formed between the first blade 111 and the second blade 112. In an embodiment, the first blade 111 substantially extends along the second curve direction; the second blade 112 substantially extends along the third curve direction, that is, the first blade 111 and the second blade 112 extend along the curve, respectively, The second curve and the third curve are two different curves with at least partial curvatures, so that a sufficient accommodation space is formed between the first blade 111 and the second blade 112.

The length of the projection of the first cutting portion 111a in the plane perpendicular to the rotation axis 100' is greater than or equal to 10mm and less than or equal to 600mm; the length of the projection of the second cutting portion 112a in the plane perpendicular to the rotation axis 100' is greater than or equal to 10mm and Less than or equal to 600mm. In an embodiment, the length of the projection of the first cutting portion 111a in a plane perpendicular to the rotation axis 100' refers to the projection of the edge 111b of the first cutting portion 111a in a plane perpendicular to the rotation axis 100' length. When the first blade 111 includes a plurality of first cutting portions 111a, the length of the projection of the first cutting portion 111a in a plane perpendicular to the rotation axis 100' is that the blade edges 111b of the plurality of first cutting portions 111a are perpendicular to the rotation The sum of the length of the projection in the plane of the axis 100'; similarly, the length of the projection of the second cutting portion 112a in the plane perpendicular to the rotation axis 100' means that the edge 112b of the second cutting portion 112a is perpendicular to The length of the projection in the plane of the rotation axis 100'; when the second blade 112 includes a plurality of second cutting portions 112a, the length of the projection of the second cutting portion 112a in a plane perpendicular to the rotation axis 100' is a plurality of first The sum of the projection lengths of the edge 112b of the two cutting portions 1112a in a plane perpendicular to the rotation axis 100'. The length of the projection of the first cutting portion 111a in a plane perpendicular to the rotation axis 100' and the length of the projection of the second cutting portion 112a in a plane perpendicular to the rotation axis 100' are both greater than or equal to 10mm and less than or equal to 600mm, In an embodiment, the length of the projection of the first cutting portion 111a in a plane perpendicular to the rotation axis 100' and the length of the projection of the second cutting portion 112a in a plane perpendicular to the rotation axis 100' are both greater than or equal to 20 mm and less than or equal to 400mm. In this embodiment, the projection length of the first cutting portion 111a in a plane perpendicular to the rotation axis 100' is about 236mm. In an embodiment, the length of the projection of the first cutting portion 111a in a plane perpendicular to the rotation axis 100' and the length of the projection of the second cutting portion 112a in a plane perpendicular to the rotation axis 100' are substantially equal.

The mass of the blade assembly 11 is greater than or equal to 0.35 kg and less than or equal to 1.8 kg. When the mass of the blade assembly 11 is within the value range, the load of the lawn mower 100 is small and the work efficiency is high. When the first blade 111 and the second blade 112 are formed separately and the mass of the first blade 111 is less than or equal to the mass of the second blade 112, the ratio of the mass of the first blade 111 to the mass of the second blade 112 is greater than or equal to 0.5 and Less than or equal to 1. In one embodiment, when the first blade 111 and the second blade 112 are formed separately and the mass of the second blade 112 is less than or equal to the mass of the first blade 111, the mass of the second blade 112 is the same as that of the first blade The mass ratio of 111 is greater than or equal to 0.5 and less than or equal to 1.

[Corrected according to Rule 91 08.07.2020]
The battery pack includes a battery pack casing and a cell unit. The cell unit is arranged in the battery pack casing. The number of cell units contained in the battery pack is N and the unit is one. The mass of the blade assembly 11 is M, and the unit is kilogram. The maximum length of the line connecting any two points of the projection of the blade assembly 11 in a plane perpendicular to the rotation axis 100' and the projection of the rotation axis 100' in the plane is the rotation diameter D of the blade assembly 11; the unit is mm . The product of the rotation diameter D (mm) of the blade assembly 11, the number of battery cells N, and the mass M (g) of the blade assembly 11 is greater than or equal to 3.5×10 ⁵ (mm·g) and less than or equal to 7.3×10 ⁷ ( mm·g); In one embodiment, the product of the rotation diameter D (mm) of the blade assembly 11, the number of battery cells N and the mass M (g) of the blade assembly 11 is greater than or equal to 7×10 ⁵ (mm ·G) and less than or equal to 3.6×10 ⁷ (mm·g); in one embodiment, the rotating diameter D (mm) of the blade assembly 11, the number of battery cells N, and the mass M (g) of the blade assembly 11 are three The product of those is greater than or equal to 1.4×10 ⁶ (mm·g) and less than or equal to 1.8×10 ⁷ (mm·g). When the product of the rotation diameter D (mm) of the blade assembly 11, the number N of battery cells, and the mass M (g) of the blade assembly 11 meets the above numerical range, the lawn mower 100 has a smaller load or a higher load. Cutting efficiency. In this embodiment, the mass M of the blade assembly 11 refers to the total mass of the blade assembly 11 including the first blade 111 and the second blade 112. When the lawn mower 100 includes multiple battery packs, the number N of battery cells here refers to the total number of battery cells included in all battery packs. In this embodiment, the rotating diameter D of the blade assembly 11 is about Equal to 508 mm, the number N of battery cells contained in the battery pack is equal to 10. In one embodiment, the number N of cell units refers to the number of cell units included in the battery pack that provides a power source for the motor 13 that drives the blade assembly 11. When the lawn mower 100 is a self-propelled lawn mower, it usually also includes a self-propelled motor that drives the wheels to rotate. In this case, the motor 13 should not include a self-propelled motor. In other words, the battery pack here does not include the battery pack for powering the self-propelled motor.

[Corrected according to Rule 91 08.07.2020]
In an embodiment, the larger value of the rotation diameter D1 of the first blade 111 and the rotation diameter D2 of the second blade 112 is defined as the transverse dimension of the blade assembly 11. The battery pack contains the number N of battery cells, and the mass of the blade assembly 11 is M(g). The product of the transverse dimension (mm) of the blade assembly 11, the number of battery cells N, and the mass M (g) of the blade assembly 11 is greater than or equal to 3.5×10 ⁵ (mm·g) and less than or equal to 7.3×10 ⁷ (mm · G); In one embodiment, the product of the transverse dimension (mm) of the blade assembly 11, the number of battery cells N, and the mass M (g) of the blade assembly 11 is greater than or equal to 7×10 ⁵ (mm·g) ) And less than or equal to 3.6×10 ⁷ (mm·g); in one embodiment, the product of the transverse dimension (mm) of the blade assembly 11, the number of battery cells N, and the mass M(g) of the blade assembly 11 1.4×10 ⁶ (mm·g) and 1.8×10 ⁷ (mm·g) or less.

The output torque of the motor 13 is greater than or equal to 0 and less than or equal to 10N·m; in one embodiment, the output torque of the motor 13 is greater than or equal to 3N·m and less than or equal to 8N·m; in this embodiment, the output torque of the motor 13 is about 4N·m. When the output torque of the motor 13 meets the above numerical range, the lawn mower 100 has higher cutting efficiency or cutting ability.

In this embodiment, the moment of inertia of the blade assembly 11 is greater than or equal to 8000 kg·mm ² and less than or equal to 23000 kg·mm ² ; in one embodiment, the moment of inertia of the blade assembly 11 is greater than or equal to 15000 kg·mm ² and less than or equal to 20000 kg·mm ² .

In addition, under certain working conditions, the lawn mower 100 not only needs to cut vegetation, but also needs to break the vegetation, or collect the cut vegetation into a collection device. By adopting the structural design of the above-mentioned blade assembly 11, the cutting The machine 100 also has a higher grass shredding ability or grass rowing ability. The lawn mower 100 is also provided with a collecting device (not shown) for collecting cut vegetation, the collecting device is connected to the chassis 12, in one embodiment, the chassis 12 is formed with a grass outlet, and the collecting device is connected to the grass outlet to For the cut vegetation to enter the collection device from the chassis 12. When the blade assembly 11 rotates at a rotational speed greater than or equal to 40m/s and less than or equal to 100m/s, the average wind speed of the grass outlet is greater than or equal to 3m/s and less than or equal to 25m/s. In one embodiment, When the blade assembly 11 rotates at a speed greater than or equal to 40m/s and less than or equal to 100m/s, the average wind speed of the grass outlet is greater than or equal to 5m/s and less than or equal to 15m/s, and the average wind speed of the grass outlet meets In the above numerical range, it is beneficial to improve the grass shredding ability and grass rowing ability of the lawn mower 100.

In this embodiment, the linear velocity of the cutting edge of the blade assembly 11 refers to the linear velocity of the point where the distance between the blade assembly 11 and the rotation axis 100' is the largest when the blade assembly 11 rotates around the rotation axis 100'.

Example two

FIG. 11 is a schematic diagram of the blade assembly 21 of the lawn mower provided in the second embodiment of the application being installed to the drive shaft 24. The difference between this embodiment and the first embodiment is that the blade assembly 21 in this embodiment does not include a connecting assembly, and the blade assembly 21 is formed with a positioning portion 213 and a mating portion configured to limit the phase angle range of the first blade 211 and the second blade 212 Section 214, the rest of the structure of the lawn mower of this embodiment is the same as that of the first embodiment. One of the first blade 211 and the second blade 212 is formed with a positioning portion 213, and the other is formed with a matching portion 214 configured to cooperate with the positioning portion 213; when the positioning portion 213 and the matching portion 214 cooperate with each other, the second The blade 212 is fixed relative to the first blade 211 in the circumferential direction around the rotation axis 211 ′ or can rotate within a preset angle range. In other words, no connecting components are required, and the position of the second blade 212 relative to the first blade 211 on the rotation axis 211' in the circumferential direction is limited only by the positioning portion 213 and the matching portion 214. In this embodiment, the first blade 211 and the second blade 212 are respectively provided with a mating portion 214 and a positioning portion 213. The positioning portion 213 is a convex portion that is provided on the second blade 212 and protrudes from the upper surface of the second blade 212. As a result, the mating portion 214 is a through hole provided on the first blade 211. When the first blade 211 and the second blade 212 are installed to the drive shaft 24, the protrusion passes through the through hole and matches with the through hole, thereby achieving The first blade 211 is positioned relative to the second blade 212 in the circumferential direction of the rotation axis 211 ′. The positioning portion 213 may be a regular three-dimensional structure such as a cylindrical shape or other irregular shapes; the matching portion 214 may be a through hole with a circular cross section, or may be other through holes that can be matched with the positioning portion 213.

In an embodiment, the specific structures of the positioning portion 213 and the mating portion 214 are not limited to the above-mentioned protrusions and through holes. For example, the positioning portion 213 is a protrusion protruding from the second blade 212, and the mating portion 214 is formed on the second blade. A accommodating portion protruding upward on the surface of the blade 211, the accommodating portion can accommodate at least a part of the positioning portion 213 or cooperate with the positioning portion 213, so as to realize the positioning of the first blade 211 relative to the second blade 212.

The number of the positioning portion 213 and the matching portion 214 is not limited. In one embodiment, the positioning portion 213 and the matching portion 214 are respectively an even number and are respectively arranged symmetrically about the rotation axis 211', so that the first blade 211 and the second blade 212 The force received is more uniform, so that the position of the first blade 211 relative to the second blade 212 is more stable.

Similar to the first embodiment, the positioning portion 213 in this embodiment roughly has a geometric center. The distance from the geometric center to the rotation axis 211' is the positioning radius r'. The positioning radius r'of the positioning portion 213 is greater than or equal to 0 mm and less than or equal to 0 mm. 50 mm. In one embodiment, the positioning radius r'of the positioning portion 213 is greater than or equal to the radius of the drive shaft 24 and less than or equal to 50 mm; in this embodiment, the positioning radius r'of the positioning portion 213 is about 30 mm. When the positioning radius r'is 0 mm, that is, the geometric center of the positioning portion 213 coincides with the rotation axis 211'. In one embodiment, a radial slot is defined on the drive shaft 24 to accommodate the positioning portion 213. The positioning portion 213 is disposed outside the drive shaft 24, that is, the positioning radius r'of the positioning portion 213 is greater than or equal to the radius of the drive shaft 24. For the positioning portion 213 with a regular shape, the geometric center is uniquely determined, and for the positioning portion 213 with an irregular shape, a point located at the center of the positioning portion 213 can be roughly determined as the geometric center. The maximum length of the line connecting any two points of the projection of the blade assembly 21 in a plane perpendicular to the rotation axis 211' and the projection of the rotation axis 211' in the plane is the rotation diameter of the blade assembly 21; The rotation diameter is greater than or equal to 200 mm and less than or equal to 700 mm. In one embodiment, the rotation diameter is greater than or equal to 250 mm and less than or equal to 560 mm. In one embodiment, the ratio of the rotation diameter of the blade assembly 21 to the positioning radius r'of the positioning portion 213 is greater than or equal to 5 and less than or equal to 25. When the position of the positioning portion 213 is within the above range, the positioning effect of the positioning portion 213 Better. Correspondingly, the mating portion 214 also roughly has a geometric center. The distance from the geometric center to the rotation axis 211' is the positioning radius of the mating portion 214. The positioning radius of the mating portion 214 is greater than or equal to 0 and less than or equal to 50 mm. In an embodiment , The positioning radius of the matching portion 214 is greater than or equal to the radius of the drive shaft 24 and less than or equal to 50 mm.

Example three

FIG. 12 is a schematic diagram of the blade assembly and the connecting assembly of the lawn mower provided in the third embodiment of the application. The difference from the first embodiment and the second embodiment lies in the structure of the connecting assembly and the connecting manner of the connecting assembly and the blade assembly, and other similarities can be applied to this embodiment. The lawn mower includes a connecting assembly 312. The connecting assembly 312 is formed with a first connecting portion 312a connected to the first blade 311 and a second connecting portion 312b connected to the second blade 313; the second blade 313 is positioned relative to the first blade 311 around the axis of rotation 311' is fixed in the circumferential direction or can rotate within a preset angle range. In other words, the first blade 311 and the second blade 313 are fixed in the circumferential direction around the rotation axis 311' through the connecting assembly 312 or can be rotated within a preset angle range, and the first blade 311 and the second blade 313 themselves Does not constitute a connection. In this embodiment, the connecting component 312 is a flange, but it is not limited to a flange. The connecting assembly 312 is fixedly connected to the first blade 311 and the second blade 313 in the vertical direction, so that the first blade 311 and the second blade 313 form a fixed phase angle. The connection between the connecting assembly 312 and the first blade 311 and the second blade 313 can also be movable, so that the second blade 313 can be within a preset angle range relative to the first blade 311 in the circumferential direction around the rotation axis 311' Rotate.

Example four

13 to 16 are schematic diagrams of the blade assembly 41 of the lawn mower provided in the fourth embodiment of the application. Similarly, the blade assembly 41 rotates around the axis of rotation 411'. The blade assembly 41 in this embodiment is different from the lawn mower in the first embodiment only in the structure of the second blade 412 of the blade assembly 41. The same points as in the first embodiment can be applied to this embodiment. In the direction parallel to the rotation axis 411', the second cutting portion 412a is located on the lower side of the first cutting portion 411a; in the circumferential direction around the rotation axis 411', the first cutting portion 411a is disposed on the second cutting portion 412a The second cutting portion 412a is provided on the front edge of the second blade 412. In an embodiment, the front side in the circumferential direction around the rotation axis 411' refers to the side that first contacts the vegetation when the blade assembly 41 rotates along the first direction A'about the rotation axis 411' as the axis, and also That is to say, the first cutting part 411a contacts the vegetation before the second cutting part 412a, and the second cutting part 412a is arranged on the edge of the second blade 412 that first contacts the vegetation. In this embodiment, the two first cutting portions 411a are respectively provided on the front side of the two ends of the first blade 411, and the two first cutting portions 411a are centrally symmetrical about the rotation axis 411'; the two second cutting portions 412a are respectively provided On the front side of the two ends of the second blade 412, the two second cutting portions 412a are center-symmetric about the rotation axis 411', and the blade assembly 41 is center-symmetric about the rotation axis 411' as a whole.

The rear side of the second blade 412 is also formed with a first guide portion 412b and a second guide portion 412c that guide the airflow to move upward, that is, the second blade 412 is in contact with the second cutting portion 412a in the circumferential direction of the rotation axis 411'. A first guide portion 412b and a second guide portion 412c are formed on the opposite side, and the first guide portion 412b and the second guide portion 412c are arranged to guide the air flow upward. The first guide portion 412b and the second guide portion 412c here refer to two entities that are at least partially separated. In this embodiment, the first guide portion 412b and the second guide portion 412c are both integrally formed with the second blade 412 The first guide portion 412b and the second guide portion 412c extend substantially perpendicular to the length direction of the second blade 412 and are arranged in sequence along the length direction of the second blade 412. In an embodiment, the first guide portion 412b and the second guide portion 412c may also be formed separately from the second blade 412 and fixedly connected to the second blade 412.

Each second cutting portion 412a corresponds to a first guiding portion 412b and a second guiding portion 412c. The first guiding portion 412b and the second guiding portion 412c are arranged on the back side of the same end of the second cutting portion 412a. In this embodiment Since the second blade 412 is provided with two second cutting parts 412a, two first guide parts 412b and two second guide parts 412c, two first guide parts 412b and two second guide parts 412c are formed. They are centrally symmetrical about the axis of rotation 411'.

The first guide portion 412b is curved upward along a first curved surface, and the second guide portion 412c is curved upward along a second curved surface different from the first curved surface. In one embodiment, at least a portion of the first guide portion 412b and at least a portion of the second guide portion 412c have different curvatures. The first guide portion 412b and the second guide portion 412c may each have a fixed curvature, or the curvatures of the first guide portion 412b and the second guide portion 412c may change according to a preset rule or may change irregularly, which is not limited here. In this embodiment, the first guide portion 412b and the second guide portion 412c have varying curvatures. In an embodiment, the radius of curvature of any point of the first guide portion 412b and the second guide portion 412c is greater than or equal to 0 and less than or equal to 100 mm. In this embodiment, any point of the first guide portion 412b and the second guide portion 412c The radius of curvature is greater than or equal to 0mm and less than or equal to 60mm.

The second blade 412 includes at least a first guide portion 412b and a second guide portion 412c. In this embodiment, the second blade 412 is further provided with a third guide portion. In an embodiment, the second blade 412 may also be provided with multiple guide portions such as a fourth guide portion, and the multiple guide portions are along the second blade The extension direction of 412 is arranged in sequence.

Both the first guide portion 412b and the second guide portion 412c are turned up from the end of the second blade 412. The first guide portion 412b starts to turn up at the first root portion 412d and the second guide portion 412c. The part that starts to turn upward is the second root portion 412e. The first root portion 412d and the second root portion 412e are approximately on the same straight line, and the straight line intersects obliquely with the extension line of the edge of the second cutting portion 412a. The intersection angle β formed by the extension line of the edge of the cutting portion 412a is greater than or equal to 0 and less than or equal to 40 degrees. In one embodiment, the intersection angle formed by the straight line and the extension of the edge of the second cutting portion 412a is greater than or equal to 0 and less than It is equal to 15 degrees. In this embodiment, the intersection angle formed by the straight line and the extension line of the second cutting portion 412a is about 6.9 degrees.

The outer side of the first guide portion 412b and the outer side of the second guide portion 412c extend substantially along the same straight line, and the straight line obliquely intersects the extension line of the second cutting portion 412a. The outer side of the first guide portion 412b refers to the edge opposite to the first root portion 412d, and the outer side of the second guide portion 412c refers to the edge opposite to the second root portion 412e. In this embodiment, the extending directions of the outer side of the first guide portion 412b and the outer side of the second guide portion 412c are substantially parallel to the straight line where the first root portion 412d and the second root portion 412e are located.

In this embodiment, the outer side of the first guide portion 412b and the outer side of the second guide portion 412c are also formed with a cutting portion opening, which can further cut vegetation and improve the grass cutting ability of the lawnmower. In an embodiment, the cutting portion openings on the first guiding portion 412b and the second guiding portion 412c are not necessarily common cutting portion structures, as long as they have a preset cutting ability.

Example five

17 is a schematic diagram of a part of the structure of the lawn mower provided in the fifth embodiment of the application. The difference between this embodiment and the first embodiment lies in the structure of the blade assembly 51 and the mounting assembly 56. The same parts as those of the first embodiment It can be applied to this embodiment.

As shown in Figures 17 to 19, the motor-driven blade assembly 51 rotates about the axis of rotation 511'; the blade assembly 51 includes a first cutting portion 511a and a second cutting portion 512a configured to cut vegetation; In the direction of the rotation axis 511', the second cutting portion 512a is located on the lower side of the first cutting portion 511a; in this embodiment, the blade assembly 51 includes a first blade 511 and a second blade 512, and the first cutting portion 511a is disposed on the first cutting portion 511a. On a blade 511, the second cutting portion 512a is disposed on the second blade 512, and the first blade 511 is installed above the second blade 512 along the direction of the rotation axis 511'. The mounting assembly 56 includes a driving member 561, which is configured to drive the blade assembly 51 to rotate about the axis of rotation 511', and the blade assembly 51 is detachably connected to the driving member 561. In one embodiment, the driving member 561 is connected to the driving shaft 54 and rotates synchronously with the driving shaft 54. The driving member 561 and the driving shaft 54 form a fixed connection along the circumference of the rotation axis 511', such as a flat connection or a threaded connection.

In this embodiment, the mounting assembly 56 further includes a driving part 561a, which is fixedly connected to the driving part 561 or integrally formed with the driving part 561; the driving part 561a is connected to the blade assembly 51 so that the blade assembly 51 rotates relative to the driving part 561 The circumferential fixed connection of the axis 511 ′ may enable the blade assembly 51 to rotate relative to the driving member 561 along the circumferential direction of the rotation axis 511 ′ within a predetermined angle range. In an embodiment, the driving part 561a is respectively connected with the first blade 511 and the second blade 512 and drives both the first blade 511 and the second blade 512 to form a synchronous rotation with the driving part 561a. The position where the driving part 561a is installed and the number of the driving part 561a are not limited. In this embodiment, the number of driving parts 561a is two, and the two driving parts 561a are respectively arranged on both sides of the rotation axis 511', and the first blade 511 and the second blade 512 are stacked together in the direction of the rotation axis 511' And at least partly in contact, the two driving parts 561a are connected with the first blade 511 and the second blade 512, and the first blade 511 and the second blade 512 are formed with positioning holes that cooperate with the two driving parts 561a; The part 561a is substantially cylindrical and forms a rotational connection with the first blade 511 and the second blade 512; the other driving part 561a forms a flat connection with the first blade 511 and the second blade 512. In other embodiments, only one driving part 561a may be provided and the driving part 561a and the blade assembly 51 may be connected in a flat position; or, two cylindrical driving parts 561a may be provided to connect to the blade assembly 51.

The mounting assembly 56 also includes a pressing assembly 562 and a fastening assembly 563; the pressing assembly 562 is arranged to clamp the blade assembly 51 along the direction of the rotation axis 511', and the blade assembly 51 is arranged in the drive in a direction parallel to the rotation axis 511'. Between the member 561 and the pressing member 562; the fastening member 563 is arranged to fix the position of the blade assembly 51 relative to the driving member 561 in a direction parallel to the rotation axis 511', and the fastening member 563 is detachably connected to the driving shaft 54. In this embodiment, the pressing component 562 is one or more metal washers and is at least partially in contact with the blade assembly 51; the fastening component 563 can be a nut, screw, or bolt, etc., and the fastening component 563 is connected to the drive shaft 54 and is in contact with each other. To the compression assembly 562. In this embodiment, the drive shaft 54 passes through the blade assembly 51 and the pressing assembly 562, and the fastening assembly 563 and the drive shaft 54 form a threaded connection. In one embodiment, when the fastening component 563 includes a bolt or screw, etc., the fastening component 563 may pass through at least one of the blade component 51 and the pressing component 562, and the fastening component 563 and the drive shaft 54 form a fixed and can Disconnected connection.

The mounting assembly 56 also includes an insulating member 564, which is arranged to realize insulation between the blade assembly 51 and the drive shaft 54; the insulating member 564 is made of insulating material; the insulating member 564 is arranged on the pressing assembly along the direction of the rotation axis 511' Between the 562 and the blade assembly 51, the first blade 511 and the second blade 512 are both disposed between the driving member 561 and the insulating member 564. In this embodiment, the insulating member 564 is in surface contact with the blade assembly 51 and the pressing assembly 562. Along the rotation axis 511' direction, a groove 564a is formed at the bottom of the insulating member 564, and the pressing component 562 is embedded in the groove 564a. The drive shaft 54 or the fastening component 563 passes through the insulating member 564.

In this embodiment, the lawn mower does not include a connecting assembly that connects the first blade 511 and the second blade 512 as a whole before installation. In other words, the first blade 511 and the second blade 512 are two independently formed and independently installed blades, which are respectively mounted to the drive shaft 54 and constituted by the mounting assembly 56. In this embodiment, the blade assembly 51 is connected through the driving part 561a so that the phase angle between the first blade 511 and the second blade 512 is basically unchanged.

Example Six

20 is a schematic diagram of a part of the structure of the lawn mower provided in the sixth embodiment of the application. The difference between this embodiment and the fifth embodiment is the structure of the mounting assembly 66. The same parts as those in the fifth embodiment can be applied. To this embodiment.

As shown in FIGS. 20-22, the difference between the mounting assembly 66 in this embodiment and the mounting assembly 56 in the fifth embodiment lies in the structure of the insulating member 664. In this embodiment, in the direction of the rotation axis 611', two grooves, an upper groove 664a and a lower groove 664b, are respectively provided above and below the insulating member 664, and the first blade 611 and the second blade 612 are arranged in the upper recess. In the groove 664a, the pressing component 662 is disposed in the lower groove 664b. The shape of the upper groove 664a fits the blade assembly 61, so that the first blade 611 and the second blade 612 have a predetermined phase angle along the rotation axis 611'. Similar to the fifth embodiment, a driving part 661a is provided on the driving member 661 (refer to FIG. 20). In this embodiment, the design of the insulating member 664 can not only better realize the insulation between the blade assembly 61 and the drive shaft, but also help the blade assembly 61 to maintain a fixed phase angle to prevent slippage; at the same time, it is also beneficial to the drive member. The 661 drives the blade assembly 61 more efficiently.

Example Seven

FIG. 23 shows a schematic diagram of part of the structure of the lawn mower provided in the seventh embodiment of the application. The difference between this embodiment and the sixth embodiment is the structure of the mounting assembly 76, and the same thing as the sixth embodiment Apply to this embodiment.

As shown in FIGS. 23-25, the difference between the mounting assembly 76 in this embodiment and the mounting assembly 66 in the sixth embodiment lies in the structure of the driving member 761 and the insulating member 764. In this embodiment, the driving member 761 drives the blade assembly 71 through friction. The drive member 761 and the blade assembly 71 form at least partial contact through the pressing assembly and the fastening assembly. In this embodiment, the drive member 761 and the blade assembly 71 form surface contact and are pressed against each other, and the drive member 761 and the blade assembly 71 are formed between A preset magnitude of positive pressure along the direction of the rotation axis 701. When the drive shaft drives the driving member 761 to rotate along the rotation axis 701, the blade assembly 71 rotates along the rotation axis 701 under the action of the friction force along the circumference of the rotation axis 701. In other words, there is no need to provide a driving part for driving the blade assembly 71 on the driving member 761, and there is no need to provide a positioning hole matching the driving part on the blade assembly 71. The driving member 761 drives the first blade 711 through friction, and the first blade 711 drives the second blade 712 through the driving insulating member 764. The insulating member 764 is disposed between the first blade 711 and the second blade 712. The insulating member 764 is also formed with an upper groove 764a and a lower groove 764b. The first blade 711 is disposed in the upper groove 764a, and the second blade 712 is disposed. In the lower groove 764b. In other words, the first blade 711 is disposed between the driving member 761 and the insulating member 764; the second blade 712 is disposed between the insulating member 764 and the pressing assembly 762. In one embodiment, the upper groove 764a and the lower groove 764b are respectively attached to the edges of the first blade 711 and the second blade 712 so that the first blade 711 and the second blade 712 form a predetermined range of phase angle. The pressing component 762 is pressed to the second blade 712. In this embodiment, the pressing component 762 is attached to the lower surface of the second blade 712.

Example eight

FIG. 26 shows a schematic diagram of part of the structure of the lawn mower provided in the eighth embodiment of the application. The difference between this embodiment and the fifth embodiment is that the structure of the blade assembly 81 and the mounting assembly 86 are the same as those of the fifth embodiment Anything can be applied to this embodiment. The blade assembly 81 includes at least two split first blades 811 and an integrally formed second blade 812. In this embodiment, the number of first blades 811 is two, and each first blade 811 is provided with one The first cutting portion 811a and the second blade 812 are provided with a second cutting portion 812a. Along the rotation axis 801 direction, the first blade 811 is located above the second blade 812. The two first blades 811 are respectively located on two sides of the rotation axis 801 and fixedly connected to the second blade 812. In an embodiment, the first blade 811 is detachably connected to the second blade 812. In other embodiments, the first blade 811 is an integral blade, the second blade 812 is a plurality of split blades and is respectively fixedly connected to the first blade 811, and the first cutting portion 811a and the second cutting portion 812a are respectively provided on the first blade 811. A blade 811 and a second blade 812. In one embodiment, the first blade 811 and the second blade 812 are integrally formed, but the first cutting portion 811a and the second cutting portion 812a are provided on the first blade 811 and the second blade 812, respectively. In other words, the blade assembly 81 is an integral blade, but is provided with a plurality of first cutting portions 811a and second cutting portions 812a distributed up and down along the rotation axis 801 direction.

In this embodiment, the driving part 861 is provided with a driving part, the blade assembly 81 is provided with a positioning hole that cooperates with the driving part, and the driving part 861 drives the blade assembly 81 to rotate through the driving part. In an embodiment, the driving part is connected to the first blade 811. The shape and number of driving parts are not limited. In one embodiment, there is no need to provide a driving part on the driving member 861, and the driving member 861 is closely attached to the blade assembly 81, and the blade assembly 81 is driven to rotate on the rotation axis 801 through friction.

Example 9

FIG. 27 shows a schematic diagram of a lawn mower 100 connected with a grass pressing assembly 20 according to the ninth embodiment. The lawn mower 100 in this embodiment is the same as the lawn mower in the first embodiment, and the only difference is The lawn mower 100 in this embodiment is also connected with a grass pressing assembly 20. The lawn mower 100 includes a blade assembly 11 and a chassis 12. The blade assembly 11 is configured to perform the cutting function of the lawn mower 100; the chassis 12 is formed with an accommodation space for accommodating at least a part of the blade assembly 11. In this embodiment, the blade assemblies 11 are all located inside the accommodation space. The lawn mower 100 has a traveling direction 101' when traveling in a straight line on the ground. In this embodiment, the traveling direction 101' is parallel to the front-rear direction. All "components" in this application refer to a combination including at least one component, and this combination achieves a specific function through interaction or cooperation. The lawn mower 100 in the present application may be a hand-push lawn mower or a riding lawn mower. In order to facilitate the description of the technical solution of the present application, the front and back and up and down directions as shown in FIG. 27 are set.

As shown in FIGS. 27 to 30, the grass pressing assembly 20 is connected to the lawn mower 100. In an embodiment, the grass pressing assembly 20 is detachably connected to the rear end of the lawn mower 100. The grass pressing component 20 is configured to compact the lawn, and the grass pressing component 20 is used as an accessory for users to selectively assemble according to specific needs. The lawn mower 100 includes a mounting shaft 17, which is perpendicular to the traveling direction 101'. The grass pressing assembly 20 is rotatably connected to the mounting shaft 17 so that the grass pressing assembly 20 can rotate about the mounting shaft 17 as an axis. The mounting shaft 17 here is a shaft body of the lawn mower 100 itself, and may be a wheel shaft for mounting wheels, or other shaft bodies. In other words, the grass pressing assembly 20 is detachably connected to the mounting shaft 17, and there is no need to add another installation structure for installing the grass pressing assembly 20 to the lawn mower 100, so it has the advantage of convenient installation. For any type of lawn mower 100, as long as it has a ready-made shaft, the grass pressing assembly 20 in this embodiment can be installed on the lawn mower 100, which has the advantage of strong adaptability.

As shown in FIG. 28, the grass pressing assembly 20 includes a roller 201, a connecting part 202 and a supporting part 203. Among them, the roller 201 has a preset weight so that the roller 201 always exerts pressure on the ground, and the pressure is large enough to make the lawn compact. In other words, the grass pressing assembly 20 in this embodiment mainly exerts pressure on the lawn by the weight of the roller 201. The connecting portion 202 and the mounting shaft 17 form a rotating connection, that is, the connecting portion 202 can rotate around the mounting shaft 17. In this embodiment, the connecting portion 202 is approximately in the shape of a hook with an opening in the circumferential direction. After the connecting portion 202 is hung on the mounting shaft 17, the connecting portion 202 is closed circumferentially by screws or pins and other fasteners so that the mounting shaft 17 cannot be removed from The connecting portion 202 is separated in the radial direction.

As shown in FIG. 29, the supporting part 203 connects the drum 201 and the connecting part 202. The supporting portion 203 and the connecting portion 201 may be integrally molded or separately molded. The supporting portion 203 includes a first supporting arm 2031 and a second supporting arm 2032. The drum 201 has a length direction, and the first supporting arm 2031 and the second supporting arm 2032 extend at least partially along the length direction perpendicular to the drum 201. The length direction of the drum 201 is parallel to the axis 171 of the mounting shaft 17.

In this embodiment, the first support arm 2031 connects the first end of the roller 201 and the connecting portion 202, and the second support arm 2032 connects the second end of the roller 201 and the connecting portion 202. The supporting portion 203 further includes a third supporting arm 2033, and the third supporting arm 2033 is fixedly connected to the first supporting arm 2031 and the second supporting arm 2032 to enhance the overall strength and rigidity of the supporting portion 203. The third support arm 2033 extends in a direction parallel to the mounting shaft 17, and both ends of the third support arm 2033 are connected to the first support arm 2031 and the second support arm 2032, respectively.

The drum 201 has a middle dividing surface 21' perpendicular to the length direction, and the drum 201 is symmetrical about the middle dividing surface 21'; the support portion 203 has a symmetry surface 22', the supporting portion 203 is symmetric about the symmetry plane 22', and the symmetry plane 22' is parallel Or coincide with the middle face 21'. When the connecting portion 202 is installed to the middle position of the mounting shaft 17, the symmetry plane 22' coincides with the center dividing plane 21'. In other embodiments, the connecting portion 202 can also be installed at any position in the axial direction of the mounting shaft 17.

As shown in FIG. 30, the drum 201 includes a central shaft 2011 and a cylindrical portion 2012. The central axis 2011 extends along the length direction of the drum 201, the cylindrical portion 2012 rotates around the central axis 2011, the cylindrical portion 2012 is basically a hollow cylindrical shape; the central axis 2011 and the cylindrical portion 2012 are both made of metal. The central shaft 2011 and the supporting part 203 are connected together by screws, and the central shaft 2011 and the screws form a threaded connection, that is, the central shaft 2011 and the supporting part 203 form a fixed connection, and the cylindrical part 2012 can rotate relative to the central shaft 2011 . In an embodiment, the screw can be replaced with a bolt fixedly connected to the supporting portion 203 so that the central shaft 2011 can rotate around the bolt; in other words, the screw and the central shaft 2011 form a rotational connection, and the central shaft 2011 can rotate relative to the screw.

In this embodiment, the lawn mower 100 includes an adjustment assembly (not shown) for adjusting the height of the chassis 12 from the ground, and the grass pressing assembly 20 is connected to a shaft on the adjustment assembly. The adjustment assembly in this embodiment is mainly composed of a linkage mechanism. When the user adjusts the height of the chassis 12 from the ground, the height of the adjusting component from the ground also changes. In other words, the height of the mounting shaft 17 from the ground is variable. In this embodiment, the installation shaft 17 is parallel to the ground, and the distance d from the axis 171 of the installation shaft 17 to the axis 2011a of the central axis 2011 of the drum 201 is long enough so that no matter what height the installation shaft 17 is from the ground, the drum 201 still touches the ground. And supported by the ground. In other words, the distance d from the axis 2011a of the central shaft 2011 to the axis 171 of the mounting shaft 17 is greater than the maximum distance from the axis 171 of the mounting shaft 17 to the ground.

Example ten

31 is a schematic diagram of the grass pressing assembly 20' provided in the tenth embodiment of the application. Compared with the ninth embodiment, the difference lies in the structure of the supporting portion 203'. Only the supporting portion 203' will be introduced below. . The supporting portion 203' includes a first supporting arm 2031', a second supporting arm 2032', and a third supporting arm 2033'. The two ends of the third support arm 2033' are respectively connected to the two ends of the drum 201'; the two ends of the first support arm 2031' are respectively connected to the third support arm 2033' and the connecting portion 202', and the two ends of the second support arm 2032' The ends are respectively connected to the third support arm 2033' and the connecting portion 202'. Wherein, the connection of the first support arm 2031' and the second support arm 2032' is a fixed connection, including welding connection or screw connection. Both ends of the third support arm 2033' extend substantially in a direction perpendicular to the mounting shaft 17', the middle portion of the third support arm 2033' extends substantially in a direction parallel to the mounting shaft 17', the first support arm 2031' and the second The two supporting arms 2032' extend in a direction perpendicular to the mounting shaft 17'.

Example 11

32 is a schematic diagram of the lawn mower 50 provided in the eleventh embodiment of the application. Compared with the first embodiment, the main difference lies in the structure and position arrangement of the lighting assembly. The following mainly introduces the lighting assembly 508 related information. As shown in Figures 32 to 34, the lawn mower 50 includes a host 501 and an operating device 502. The host 501 includes a host housing 5011, a prime mover, and a working component 5013. The working component 5013 includes a tool function for performing garden tools. For the lawn mower 50, the working element is a cutting element configured to cut grass, and is a blade assembly 5013a. The main engine housing 5011 is configured to install the prime mover and the working element for output power. For the lawn mower 50, the main body housing 5011 may include a chassis 60. The prime mover is configured to output power to the working element to drive the work element to move. In this embodiment, the prime mover is a motor 5012 that can drive the blade assembly 5013a to rotate. The operating device 502 is configured to be operated by the user to control the host 501, and the operating device 502 includes an operating element for the user to operate, and the operating element is a trigger 5021. As a hand-push power tool, the lawn mower 50 also includes a connecting rod assembly that connects the host 501 and the operating device 502. The lawn mower 50 also includes a pair of walking wheels 5014. The walking wheels 5014 drive the lawn mower 50 to walk on the ground. The two walking wheels 5014 are symmetrically arranged on both sides of the first plane 501'.

The connecting rod assembly includes a pair of connecting rods 5031, and the connecting rods 5031 connect the host 501 and the operating device 502. The two connecting rods 5031 are symmetrically arranged on both sides of the first plane 501'. In this embodiment, the area at the end of the connecting rod assembly 503 with the operating device 502 is defined as the operating area 505, the area at the end of the connecting rod assembly 503 with the host 501 is defined as the working area 503, and the operating device 502 is located in the operating area In 505, the host 501 is located in the work area 503. The connecting rod assembly further includes an armrest 5032, which can be held by a user in an operating position to push the lawn mower 50. The armrest 5032 connects the two connecting rods 5031 and is located at the end of the connecting rod 5031 away from the host 501.

As shown in FIGS. 32 to 35, a signal acquisition system 5023 is also provided in the operation area 505, and the signal acquisition system 5023 is connected to the operation device 502 to receive input information of the operation device 502. A signal output system 5015 is also provided in the work area 503, and the signal output system 5015 is set to control the output of the work component 5013. The operating device 502 further includes an operating table 5022, the operating table 5022 is connected to two connecting rods 5031, and the operating table 5022 is located between the armrest 5032 and the host 501. The trigger 5021 and the console 5022 form a rotating connection. The user can rotate the trigger 5021 so that the trigger 5021 fits to the armrest 5032, and the user's hand simultaneously holds the trigger 5021 and the armrest 5032. The signal acquisition system 5023 is arranged in the space surrounded by the console 5022. The signal output system 5015 is arranged in the space surrounded by the main body housing 5011.

The lawn mower 50 further includes a signal line assembly 504 that connects the signal output system 5015 and the signal acquisition system 5023 so that the signal output system 5015 and the signal acquisition system 5023 form a communication connection. In this way, after the signal acquisition system 5023 collects the signals output by the operating device 502, the signal line component 504 transmits the information to the signal output system 5015, and the signal output system 5015 controls the working component 5013 to perform corresponding functions in corresponding states.

The signal acquisition system 5023 includes a signal circuit board 5023a, and the signal output system 5015 includes a first output circuit board 5015a, and the first output circuit board 5015a is connected to a motor 5012. The signal circuit board 5023a is configured to install or connect a signal switch, and the signal switch is controlled by an operating element. The first output circuit board 5015a sends signals to the working elements, electronic switches, circuit boards, etc. in the working area 503. The signal line assembly 504 includes a first signal line 5041, and the first signal line 5041 is respectively connected to the first output circuit board 5015a and the signal circuit board 5023a to realize communication between the first output circuit board 5015a and the signal circuit board 5023a.

Garden tools in the related art connect multiple electronic components through power lines and electronic switches, resulting in large power loss, high cable costs, and complicated wiring, resulting in chaos in the internal structure of the machine. In this embodiment, the first signal line 5041 is used to connect the signal circuit board 5023a and the first output circuit board 5015a. A total signal line can realize the connection between multiple electronic components, thereby making the mowing of this embodiment The machine 50 has low power loss, low cable cost and simple wiring, which makes the internal structure of the machine simple. Moreover, because the internal cables of the lawn mower 50 are small and the wiring is simple, the lawn mower 50 has good stability, is not easy to be damaged, and is relatively convenient for maintenance.

In this embodiment, the signal acquisition system 5023 is provided with only one signal circuit board 5023a. In other embodiments, the signal acquisition system 5023 also includes multiple signal circuit boards 5023a, and the multiple signal circuit boards 5023a are implemented through signal lines. Communication connection.

The lawn mower 50 also includes a power source. The power source is a battery pack 5016. The battery pack 5016 is configured to supply power to the motor 5012. The battery pack 5016 and the motor 5012 are both installed on the host 501. The signal output system 5015 further includes a second output circuit board 5015b, and the second output circuit board 5015b is disposed in the host casing 5011. The second output circuit board 5015b and the battery pack 5016 form a communication connection. The first signal line 5041 is also connected to a splitter 5042. The splitter 5042 is connected to two output terminals 5042a. The two output terminals 5042a are respectively connected to the first output circuit board 5015a and the second output circuit board 5015b (refer to FIG. 34 35), so that the first output circuit board 5015a communicates with the first signal circuit board 5023a through the first signal line 5041, and the second output circuit board 5015b communicates with the first signal circuit board 5023a through the first signal line 5041 Communication connection.

In this embodiment, the working assembly 5013 also includes other functional elements that implement additional functions of the lawn mower 50, and the functional elements may be, for example, a lighting element 5081 or a self-propelled motor. In this embodiment, the functional element is the lighting element 5081 as an example. The lawn mower 50 also includes a third output circuit board 5015c for controlling the lighting element 5081, and the third output circuit board 5015c is connected to the first output circuit board 5015a.

The first output circuit board 5015a is also installed or connected to a first access terminal 5015d, and the first access terminal 5015d is configured to receive the signal output by the first signal line 5041. The second output circuit board 5015b is also installed or connected with a second access terminal 5015e, and the second access terminal 5015e is configured to receive the signal output by the first signal line 5041. The first access terminal 5015d is connected to one of the two output terminals 5042a connected to the splitter 5042, and the second access terminal 5015e is connected to the other of the two output terminals 5042a connected to the splitter 5042. The two output terminals 5042a are provided with USB female sockets, and the first access terminal 5015d and the second access terminal 5015e are provided with USB male sockets. In one embodiment, the USB female socket is a TYPE-C female socket, and the USB male socket is a TYPE-C male socket. In this way, the signal line assembly 504 has good versatility, is convenient for maintenance, and can improve the stability of the lawn mower 50. In other embodiments, the output terminal 5042a may be provided with a USB male socket, and the first access terminal 5015d and the second access terminal 5015e may be provided with a USB female socket.

Embodiment 12

36 is a schematic diagram of the lawn mower 50 provided in the twelfth embodiment. The signal output system 5051 of the lawn mower 505 includes a first output circuit board 5052 and a second output circuit board 5053. The motor 5054 and the battery pack 5055 are both connected to the first output circuit board 5052, and the signal circuit board 5056 and the first output circuit board 5052 are connected through signal lines. The second output circuit board 5053 is connected to a functional element 5057 configured to implement other functions of the lawn mower 505.

As shown in FIGS. 32 and 37, the lawn mower 50 further includes a lighting assembly 508 and a status display assembly 509. The lighting assembly 508 includes a lighting switch 5082 and the lighting element 5081 in FIG. 32. The lighting element 5081 is arranged in the working area 503 to illuminate the area on the front side of the lawn mower 50, thereby facilitating the user to work in a poor light environment. The lighting element 5081 is provided on the host 501, and the lighting element 5081 is provided on the host housing 5011. The lighting switch 5082 is set to be operated by the user to control whether the lighting element 5081 is turned on. The status display component 509 includes a status display light 5091, which can display the working status of the lawn mower 50, and the status display light 5091 can also display whether the lawn mower 50 is activated. Among them, the lighting switch 5082 and the status display lamp 5091 are both located in the operation area 505. In this way, when the user stands on the rear side of the operating device 502, the user can conveniently operate the lighting switch 5082 to light up the lighting element 5081. Especially during the operation of the lawn mower 50, the user does not need to release the trigger 5021 to walk to the side or front of the lawn mower 50 to activate the lighting element 5081. Therefore, the user can conveniently and easily operate the lighting switch 5082 at any time during the operation of the lawn mower 50, thereby improving the convenience of operation. Moreover, the user can also easily observe the display state of the status display component 509, and there is no need for the user to leave the operating position to observe the status display component 509.

The lighting switch 5082 and the status display lamp 5091 are both arranged on the console 5022, and the lighting switch 5082 and the status display lamp 5091 are also located between the trigger 5021 and the host 501, thereby facilitating the user's operation.

As shown in Figure 33, Figure 36 and Figure 37, a safety switch 5024 is also provided in the middle of the console 5022. The safety switch 5024 and the trigger 5021 constitute a switch group for starting the motor 5054. When one of the safety switch 5024 and the trigger 5021 is not triggered, the lawn mower 50 is in a stopped state. When the safety switch 5024 is triggered, the user activates the trigger 5021 to start the motor 5054; and when the safety switch 5024 is not triggered, the user activates the trigger 5021 to start the motor 5054. Among them, the lighting switch 5082 and the status display lamp 5091 are respectively located on both sides of the safety switch 5024, so that the structural layout on the operating table 5022 is more reasonable, and it is more convenient for the user to operate the lawn mower 50.

In this embodiment, the lighting switch 5082 and the status display lamp 5091 are respectively arranged on both sides of the first plane 501', so that it is convenient for the user to operate the lighting switch 5082, and it is also convenient for the user to observe the display status of the status display lamp 5091. In other embodiments, the lighting switch 5082 can also be arranged on the armrest 5032 or near the armrest 5032, as long as the user is standing at the back of the lawn mower 50 without leaving the operating area 505 to operate the lighting switch 5082.

The armrest 5032 includes a crossbar 5032a for the user to hold, and the crossbar 5032a extends in a direction perpendicular to the connecting rod 5031. The minimum distance between the light switch 5082 and the cross bar 5032a is greater than or equal to 0 cm and less than or equal to 30 cm. In this way, it can be ensured that the user can extend his arms to operate the lighting switch 5082 when holding the crossbar 5032a.

In one embodiment, the lighting switch 5082 is a membrane switch, which occupies a small space and has a low manufacturing cost. The lighting switch 5082 is also provided with an LED light, so that the user can conveniently observe whether the lighting switch 5082 is triggered in a relatively bright environment.

In this embodiment, the number of status display lights 5091 is five, and the five status display lights 5091 are respectively: working status display light, work mode display light, temperature status display light, load status display light and power status display light . The working status indicator light shows whether the lawn mower 50 has been started, so that it can be judged whether the lawn mower 50 has been damaged by the display status of the operating status indicator light. The working mode display lamp displays the folded state of the lawn mower 50 or the telescopic state of the link assembly 503 of the lawn mower 50. The temperature status indicator shows whether the temperature of the battery pack 5055 or the motor 5054 exceeds the corresponding preset temperature. The load status indicator shows whether the lawn mower 50 is in an overload state. The power status indicator shows the remaining power of the battery pack 5055, or whether the remaining power of the battery pack 5055 is lower than the preset power.

As shown in FIGS. 32, 33, and 38, the chassis 60 is formed with an accommodation space 60a covering the blade assembly 5013a. In the accommodating space 60a, the blade assembly 5013a rotates with the rotation axis 504' as an axis, thereby performing a cutting function.

As shown in FIGS. 38 and 41, the lawn mower 50 has a lead-out mode and a grass-crushing mode. When the lawn mower 50 is in the lead-out mode, grass clippings can be discharged to the outside of the chassis 60. When the lawn mower is in the grass shredding mode, the grass clippings will fall under the chassis 60.

As shown in FIGS. 38 to 40, the chassis 60 includes a vortex part 601 and a lead-out part 602. The vortex part 601 extends around the circumferential direction of the rotation axis 504' to form a vortex in the accommodation space 60a. The vortex portion 601 forms a vortex passage 6011, and the vortex flows in the vortex passage 6011 along a circulation path 60b. The circulation path 60b also extends substantially in the circumferential direction around the rotation axis 504'. The lead-out part 602 is provided on the vortex flow path 60b, the lead-out part 602 extends from the vortex part 601 in the tangential direction of the vortex flow, and the lead-out part 602 guides the vortex flow to flow out in the tangential direction of the flow path 60b. Therefore, when the lawn mower 50 is in the lead-out mode, the lead-out part 602 can guide the cuttings to move along the circulation path 60b of the vortex channel 6011, and then when the cuttings move to the lead-out part 602, the lead-out part 602 will guide a part of the cuttings along the The tangential direction of the circulation path 60b leaves the chassis 60, thereby expelling this part of the grass clippings to the outside of the lawnmower 50, or collecting this part of the clippings into a grass collecting basket.

As shown in FIG. 41, the lawn mower 50 further includes a plug 6017. When the plug 6017 is installed to the lead-out portion 602, the lead-out portion 602 is sealed, so that the lawn mower 50 is in the grass-crushing mode. When the plug 6017 is not installed in the lead-out part 602, the lead-out part 602 is open and the air flow can flow out from the lead-out part 602, so that the lawn mower 50 is in the lead-out mode.

In this embodiment, as shown in Figures 38 and 40, the chassis 60 further includes a stopper 603, which is configured to prevent the vortex from passing the lead-out part 602 and continue to circulate in the vortex part 601 while flowing through the lead-out part 602 , Thereby increasing the flow rate of the vortex flow out of the lead-out portion 602. At least a part of the lead-out portion 602 and at least a part of the stop portion 603 are located on the same side of the first plane 501', and the first plane 501' passes through the rotation axis 504'. The stopper 603 stops the vortex, on the one hand, when the mower 500 is in the lead-out mode, it can increase the flow rate of the vortex from the lead-out part 602, thereby improving the efficiency of grass clippings. On the other hand, the lawn mower 500 When in the grass-crushing mode, it can also stop the grass clippings so that a part of the grass clippings will fall into the cutting area of the blade assembly 5013a again, and then be cut by the blade assembly 5013a again, thereby improving the grass-crushing ability.

In an embodiment, the chassis 60 further includes a mounting portion 604 configured to mount the motor 5054, and the mounting portion 604 is formed with a hole 6041 around the rotation axis 504' that allows the motor shaft to pass through.

As shown in FIG. 39, the vortex portion 601 includes an inner ring 6012, an outer ring 6013, and a bottom surface 6014. The inner ring 6012 is formed around the rotation axis 504', and the inner ring 6012 is connected to the mounting portion 604. The outer ring 6013 is arranged around the inner ring 6012. The bottom surface 6014 connects the inner ring 6012 and the outer ring 6013. A vortex passage 6011 of the vortex portion 601 is formed between the inner ring 6012 and the outer ring 6013.

The lead-out portion 602 includes a first lead-out surface 6021, a second lead-out surface 6022, and a lead-out bottom surface 6023. The first lead-out surface 6021 is connected to the inner ring 6012, and the second lead-out surface 6022 is connected to the outer ring 6013. The first outlet surface 6021 extends from the inner ring 6012 substantially along a tangential direction of the inner ring 6012, and the second outlet surface 6022 extends from the outer ring 6013 substantially along a tangential direction of the outer ring 6013. The leading-out bottom surface 6023 connects the first leading-out surface 6021 and the second leading-out surface 6022, and the leading-out bottom surface 6023 is also connected to the bottom surface 6014 of the vortex portion 601.

The stopping portion 603 includes a stopping surface 6031 and a connecting surface 6032. The stop surface 6031 is provided to stop the air flow circulating in the vortex portion 601 so that the air flow flows out from the lead-out portion 602. The lead-out portion 602 is substantially located on the first side of the first plane 501'. In this embodiment, if more than 90% of the lead-out portion 602 is located on the first side of the first plane 501', it can be considered that the lead-out portion 602 is basically located on the first side of the first plane 501'. The stop surface 6031 is also located on the first side of the first plane 501', that is, the stop surface 6031 and the lead-out portion 602 are located on the same side of the first plane 501'. Or, in other embodiments, a part of the stop surface 6031 and the lead-out portion 602 are located on the same side of the first plane 501'. Or, in other embodiments, at least a part of the stop surface 6031 and at least a part of the lead-out portion 602 are located on the same side of the first plane 501'.

The stop portion 603 is provided at the edge of the lead-out portion 602. In an embodiment, the stop surface 6031 is disposed at the first lead-out surface 6021, and the stop surface 6031 extends from the inner ring 6012 to the outer ring 6013. The stop surface 6031 also extends from the bottom surface 6014 in a direction away from the bottom surface 6014, that is, one side of the stop surface 6031 is connected to the connection between the bottom surface 6014 and the first outlet surface 6021. The connecting surface 6032 extends from a side of the stopping surface 6031 away from the bottom surface 6014 along a plane obliquely intersecting the stopping surface 6031, and the connecting surface 6032 connects the stopping surface 6031 and the bottom surface 6014.

In this embodiment, the stop portion 603 is integrally formed with the vortex portion 601, and the vortex portion 601 is recessed toward the ground to form the stop portion 603. The stop portion 603 is located inside the vortex portion 601, the stop portion 603 is also located in the vortex channel 6011 formed by the vortex portion 601, and the stop portion 603 is also located on the flow path 60b of the vortex.

The stop portion 603 and the lead-out portion 602 are also arranged on the same side of a second plane 502' passing through the rotation axis 504' and perpendicular to the first plane 501'. In other words, the stop part 603 and the lead-out part 602 are provided at the rear of the chassis 60.

In the direction perpendicular to the first plane 501', at least a part of the stop portion 603 is also located between the lead-out portion 602 and the hole 6041.

The ratio of the length L1 of the stop portion 603 in the direction of the rotation axis 504' to the depth L2 of the vortex portion 601 in the direction of the rotation axis 504' is greater than or equal to 0.1 and less than or equal to 0.5, so that on the one hand, the size of the stop portion 603 can be prevented from being too large As a result, effective vortex cannot be generated in the vortex portion 601. On the other hand, it can also avoid that the stop portion 603 is too small to affect the derivation efficiency of the derivation portion 602 and the grass cutting ability of the lawn mower 50.

Embodiment 13

FIG. 42 shows the lawn mower 10 provided in the thirteenth embodiment of the present application. Compared with the first embodiment, the main reason lies in the structure of the blade assembly 101 being different. As shown in FIGS. 42 to 46, the lawn mower 10 includes a blade assembly 101 for cutting vegetation and a chassis 102 for accommodating the blade assembly 101. The blade assembly 101 is located inside the chassis 102. The lawn mower 10 further includes a motor 103 for driving the rotation of the blade assembly 101. The motor 103 is located above the chassis 102. The motor 103 and the blade assembly 101 form a coaxial rotation with the rotation axis 10' as the axis. The motor 103 includes a motor shaft, and the blade assembly 101 includes a drive shaft 1011 that drives the blade assembly 101 to rotate (refer to FIG. 44). The drive shaft 1011 may be a motor shaft. In an embodiment, the motor 103 and the blade assembly 101 may also be provided There is a transmission mechanism for transmission, so that the shaft of the motor 103 and the drive shaft 1011 form a non-coaxial rotation.

As shown in Figures 44 to 46, the blade assembly 101 includes a first blade 1012 and a second blade 1013. The first blade 1012 is located above the second blade 1013 with respect to the ground. The first blade 1012 and the second blade 1013 are both on the axis of rotation. 10' is the axis rotation. The first blade 1012 and the second blade 1013 constitute synchronous rotation. As shown in the direction of the arrow in FIG. 44, the first blade 1012 and the second blade 1013 rotate synchronously along the rotation direction 10a' with the drive shaft 1011 as an axis. The blade assembly 101 further includes a connecting assembly 1014. The first blade 1012 and the second blade 1013 form a fixed connection through the connecting assembly 1014. In this embodiment, the first blade 1012 and the second blade 1013 form a detachable connection through the connecting assembly 1014. It is convenient to repair or replace the blade assembly 101 later. The connecting assembly 1014 includes a connecting piece and a nut. The connecting assembly 1014 also uses other connecting structures to connect the first blade 1012 and the second blade 1013. The specific connection form between the first blade 1012 and the second blade 1013 is not limited herein. The blade assembly 101 may also include other accessories such as bearings and bearing covers.

Along the rotation direction 10a', the first blade 1012 is located in front of the second blade 1013, that is, when the motor 103 starts, although the first blade 1012 and the second blade 1013 rotate synchronously, the first blade 1012 is faster than the second blade 1013. 1013 cut to vegetation first. In this embodiment, the rotation direction 10a' is a clockwise direction with the drive shaft 1011 as the axis. The first blade 1012 includes a first mounting portion 1012a and a first cutting portion 1012b, the first mounting portion 1012a is located in the middle of the first blade 1012, and the first mounting portion 1012a is configured to realize the first blade 1012 and the second blade 1013 and the drive shaft For the connection between 1011, the first cutting part 1012b is symmetrically arranged at both ends of the first blade 1012 with respect to the drive shaft 1011, and the first cutting part 1012b is arranged to cut vegetation. Similarly, the second blade 1013 includes a second mounting portion 1013a located in the middle and a second cutting portion 1013b symmetrically arranged at both ends. The difference is that the middle and both ends of the first blade 1012 are basically on the same plane, that is, the first mounting part 1012a and the first cutting part 1012b are on the same plane, and the entire first blade 1012 is basically spread out along the same plane. ; And the middle and both ends of the second blade 1013 are located on different planes, the two ends of the second blade 1013 are located below the middle of the second blade 1013 relative to the ground, that is, the second cutting portion 1013b is located in the second installation relative to the ground Below the portion 1013a, the entire second blade 1013 is spread out along the curved surface. In this embodiment, the first mounting portion 1012a and the second mounting portion 1013a overlap up and down and intersect obliquely. The first mounting portion 1012a and the second mounting portion 1013a form a fixed connection through a connecting piece 1014a (refer to Figure 45 and Figure 46). The member 1014a is provided with pins of different shapes, and the first mounting portion 1012a and the second mounting portion 1013a are respectively provided with holes matching the pins, so as to form a fixed connection with the connecting member 1014a. In this embodiment, the first mounting portion Round holes and irregularly shaped limiting holes are provided on the 1012a and the second mounting portion 1013a.

The first cutting portion 1012b of the first blade 1012 is provided with a first cutting edge 1012c for cutting vegetation. The first cutting edge 1012c is provided on the front edge of the first cutting portion 1012b. The front edge refers to the direction of rotation of the first blade 1012. When 10a' rotates, the first cutting portion 1012b cuts to the edge of the vegetation first. The front edges of the first cutting portions 1012b at both ends of the first blade 1012 are symmetrically provided with first cutting edges 1012c with respect to the driving shaft 1011. Similarly, the front edges of the second cutting portions 1013b at both ends of the second blade 1013 are also symmetrically provided with second cutting edges 1013c.

The first cutting edge 1012c and the second cutting edge 1013c respectively include hardened parts for cutting vegetation, and the hardened parts have higher hardness than other parts because of the hardening process. In an embodiment, the entire first cutting edge 1012c and the second cutting edge 1013c are hardened, and the hardness is higher than other parts of the first blade 1012 and the second blade 1013.

The first blade 1012 also includes a weight-reducing portion 1012d. The weight-reducing portion 1012d is provided at the end of the first blade 1012, and is provided behind the first cutting edge 1012c and in front of the second cutting edge 1013c along the rotation direction 10a'. It means that the weight-reducing portion 1012d is a portion of the end of the first blade 1012 opposite to the first cutting edge 1012c. The weight-reducing portion 1012d is symmetrically arranged at both ends of the first blade 1012. The weight-reducing portion 1012d is recessed inward relative to the first blade 1012. The weight-reducing portion 1012d can reduce the weight of the first blade 1012 and enlarge the first blade 1012 and the second blade 1012. The space between the cutting blades 1013c is conducive to the secondary cutting of vegetation cut by the first cutting blade 1012c. The first blade 1012 further includes a relief edge 1012e inclined or curved relative to the rear edge of the first blade 1012, and the relief edge 1012e is disposed at the rear edge of the end of the first blade 102. In this embodiment, the relief edge 1012e is a part of the edge of the weight reducing portion 1012d, and the relief edge 1012e is inclined toward the inside of the first blade 1012 relative to the rear edge of the first blade 1012. Along the rotation direction 10a', the relief edge 1012e is located in front of the second cutting edge 1013c; the projection of the relief edge 1012e on the ground and the projection of the second cutting edge 1013c on the ground do not intersect. In other words, since the relief edge 1012e is inclined or bent forward with respect to the rear edge of the first blade 1012, the projections of the relief edge 1012e and the second cutting edge 1013c in a plane parallel to the ground have no overlapping part.

As shown in Figure 46, the giving way edge 1012e and the trailing edge of the first blade 1012 form a continuous curve with at least one bending point B. The projection of the bending point B on the ground is located in the second cutting along the rotation direction 10a'. The blade 1013c is in front of the projection on the ground. That is to say, the bending point B formed by the relief edge 1012e and the rear edge of the first blade 1012 is located outside the second cutting edge 1013c in a plane parallel to the second blade 1013, and the bending point B is at The lateral distance from the projection of the second blade 1013 to the second cutting edge 1013c in the plane is greater than zero. In one embodiment, the giving way edge 1012e and the trailing edge of the first blade 1012 may constitute multiple bending points. At this time, the multiple bending points should also meet the above conditions, that is, the bending point is on the ground. The projection of is located in front of the projection of the second cutting edge 1013c on the ground along the rotation direction 10a', and the lateral distance from the bending point to the second cutting edge 1013c is greater than zero.

On the other hand, the length L3 of the relief edge 1012e is greater than or equal to 40 mm and less than or equal to 150 mm. In one embodiment, the length L3 of the relief edge 1012e is greater than or equal to 70 mm and less than or equal to 100 mm. In this embodiment, let The length L3 of the bit side 1012e is about 95 mm.

The projection of the relief edge 1012e on the ground and the projection of the second cutting edge 1013c on the ground do not intersect. This makes full use of the length of the second cutting edge 1013c for secondary cutting, and at the same time makes the relief edge 1012e and the second cutting edge 1013c separate The space formed therebetween is larger, and it is convenient for the vegetation cut by the first cutting blade 1012c to rebound and fall into the space to be cut twice by the second cutting blade 1013c, thereby improving the cutting efficiency of the lawnmower 10.

Since the first blade 1012 and the second blade 1013 are overlapped and arranged, the extension line of the relief edge 1012e and the extension line of the second cutting edge 1013c form an included angle of a preset angle. In one embodiment, the relief edge 1012e The angle between the extension line of the second cutting edge 1013c and the extension line of the second cutting edge 1013c is greater than or equal to 15 degrees and less than or equal to 45 degrees. In one embodiment, the extension line of the relief edge 1012e and the extension line of the second cutting edge 1013c are between The included angle between is greater than or equal to 25 degrees and less than or equal to 35 degrees. In this embodiment, the included angle is about 30 degrees.

The second blade 1013 also includes upturned portions 1013d disposed at both ends of the second blade 1013. The upturned portions 1013d are upwardly tilted and are symmetrically distributed at both ends of the second blade 1013 with respect to the drive shaft 1011. The second blade 1013 generates After being lifted by the upturning part 1013d, the airflow can take up the grass cut by the second blade 1013 and throw it upward, so that the second blade 1013 has a good performance of throwing grass.

A noise reduction part capable of reducing noise is also provided near the warped part 1013d, and the noise reduction part is a noise reduction groove recessed inward.

Embodiment Fourteen

47 and FIG. 48 are schematic diagrams of the lawn mower 30 provided in the fourteenth embodiment of the application. In this embodiment, the lawn mower 30 is a hand-push lawn mower or a riding lawn mower. The lawn mower 30 includes a blade assembly 301, a transmission mechanism, a motor, a housing 302, a handle 303 and wheels 304.

The motor-driven blade assembly 301 rotates along the cutting direction 30a' with the rotation axis 301' as the axis, wherein the cutting direction 30a' is the clockwise or counterclockwise direction with the rotation axis 301' as the center line. The transmission mechanism connects the blade assembly 301 and the motor, and transmits the power of the motor to the blade assembly 301. The housing 302 fixes or accommodates the motor. The casing 302 is used as the main frame structure of the lawn mower to assemble multiple parts into one body. The lawn mower 30 also includes a battery pack for powering the motor. The casing 302 includes a motor casing and a main casing. The motor housing is configured to fix or accommodate the motor. The motor housing is connected to the main housing. The housing 302 is provided with a circuit board configured to control the motor.

The handle 303 is formed with a grip for the user to hold. The handle 303 may be formed by the housing 302, or may be mounted to the housing 302 as a separate part. The lawn mower 30 also includes a connecting rod connecting the handle 303 and the housing 302, and the connecting rod is telescopic and rotatable relative to the housing 302. The lawn mower 30 also includes a self-propelled motor that drives the wheels 304 to rotate. The self-propelled motor and the wheels 304 are driven by a transmission structure. In one embodiment, the self-propelled motor and the wheels 304 are driven by a transmission gear.

As shown in Figures 48 to 50, the blade assembly 301 includes a blade 3011 and a rotating shaft 3012. The rotating shaft 3012 has a rotation axis 301' as its central axis. The blade 3011 is symmetric about the rotation axis 301'. The blade 3011 extends substantially along a straight line. Perpendicular to the rotation axis 301', the blade 3011 extends substantially along a plane perpendicular to the rotation axis 301'. The blade 3011 includes a bottom surface 3011a and a top surface 3011b. The top surface 3011b is farther away from the ground than the bottom surface 3011a. In this embodiment, the bottom surface 3011a and the top surface 3011b are parallel to each other and both are perpendicular to the rotation axis 301'. In one embodiment, The bottom surface 3011a is a curved surface, and at least part of the bottom surface 3011a is inclined with respect to the top surface 3011b; in one embodiment, the top surface 3011b is a curved surface, and at least part of the top surface 3011b is inclined with respect to the bottom surface 3011a.

The blade 3011 also includes a cutting surface 3011c. The cutting surface 3011c is a plane located between the bottom surface 3011a and the top surface 3011b. The plane of the cutting surface 3011c intersects the plane of the bottom surface 3011a and the plane of the top surface 3011b obliquely, that is, cutting The surface 3011c connects the bottom surface 3011a and the top surface 3011b and forms a continuous curved surface. The inclination angle between the cutting surface 3011c and the bottom surface 3011a is greater than or equal to 20 degrees and less than or equal to 35 degrees. In this embodiment, the inclination angle between the cutting surface 3011c and the bottom surface 3011a It is about 28 degrees, and the inclination angle between the cutting surface 3011c and the top surface 3011b is about 30 degrees to 52 degrees. The blade 3011 further includes a cutting portion 3011d, which is located at one end of the blade 3011 and at the front edge of the blade 3011 along the cutting direction 30a'. The front edge means that the blade 3011 first touches the edge of the vegetation when it rotates in the cutting direction 30a', and the edge that touches the vegetation after the front edge is the rear edge, as shown in FIG. 49. In an embodiment, the blade 3011 includes two cutting portions 3011d, the two cutting portions 3011d are respectively located at both ends of the blade 3011 and located at the front edge of the blade 3011 along the cutting direction 30a'.

The cutting portion 3011d is defined by the bottom surface 3011a and the cutting surface 3011c; in this embodiment, since the bottom surface 3011a and the cutting surface 3011c obliquely intersect, the cutting portion 3011d is formed by the bottom surface 3011a and the cutting surface 3011c, and the bottom surface 3011a and the cutting surface 3011c intersect to form Cutting edge; In one embodiment, the plane of the cutting surface 3011c obliquely intersects the bottom surface 3011a, but the cutting surface 3011c does not directly intersect the bottom surface 3011a; in comparison, the cutting portion 3011d formed with the cutting edge is sharper and the cutting efficiency is also higher.

The cutting portion 3011d is composed of a body portion 3011e and a hardened portion 3011f, wherein the hardened portion 3011f extends inwardly along the end of the blade 3011 and extends from the bottom surface 3011a to the top surface 3011b of the blade 3011, and the hardened portion 3011f is a partial cutting portion 3011d is a hardened layer formed after laser quenching, but the body portion 3011e is not laser quenched, and the surface hardness of the hardened portion 3011f is greater than the surface hardness of the body portion 3011e. In one embodiment, the ratio of the surface hardness of the hardened portion 3011f of the blade 3011 to the surface hardness of the main body portion 3011e is greater than 1.1 and less than or equal to 2.4; in one embodiment, the surface hardness of the hardened portion 3011f is greater than that of the main body portion 3011e. The ratio of surface hardness is greater than 1.2 and less than or equal to 2. The surface hardness distribution of the hardened part 3011f and the body part 3011e makes the structure of the blade 3011 more reasonable. The hardened part 3011f is a cutting part 3011d close to the bottom and end of the blade 3011. This part of the cutting part 3011d is a high frequency area for cutting vegetation. Accordingly, the higher surface hardness of the hardened portion 3011f enables the blade 3011 to have better wear resistance and higher cutting efficiency, and also improves the reliability and service life of the blade 3011 of the lawn mower 30.

The method of manufacturing the blade 3011 includes: laser cutting and forming, laser cutting the metal sheet to obtain the blade 3011 in an unsharpened state; laser quenching, laser quenching the area where the hardened portion 3011f is located, and improving the surface hardness of the area; The cutting portion 3011d is processed, and the blade 3011 in the unsharpened state is polished to form the cutting portion 3011d; and the blade 3011 is polished to remove the burrs generated during the processing of the blade 3011.

The area where the hardened portion 3011f is located is shown in FIGS. 49 and 50. In one embodiment, the hardened portion 3011f has a trapezoidal cross section and a rectangular longitudinal section. The length L of the hardened portion 3011f is greater than or equal to 50mm and less than or equal to 120mm; the lateral width W of the hardened portion 3011f is greater than or equal to 2mm and less than or equal to 8mm; the depth H of the hardened portion 3011f is greater than 0.2mm and less than or equal to 1mm, in one embodiment Among them, the depth H of the hardened portion 3011f is greater than 0.3 mm and less than or equal to 0.6 mm. In this embodiment, the length L of the hardened portion 3011f is about 100mm; the transverse width W of the hardened portion 3011f is about 5mm, which is approximately equal to the transverse width of the cutting portion 3011d; the depth H of the hardened portion 3011f is about 0.5mm. The depth H of the hardened portion 3011f refers to the depth of the hardened layer obtained after laser hardening of the blade 3011. The above-mentioned size setting of the hardened portion 3011f of the blade 3011 can ensure the cutting strength while saving manufacturing costs. In addition, considering the different degrees of wear of the hardened portion 3011f and the body portion 3011e, the above size design makes the cutting portion 3011d still wear Can keep sharp for a long time.

In addition, the ratio of the surface hardness of the hardened portion 3011f to the depth of the hardened portion 3011f is greater than or equal to 1000HV1/mm and less than or equal to 2000HV1/mm; in one embodiment, the surface hardness of the hardened portion 3011f and the depth of the hardened portion 3011f The ratio of is greater than or equal to 1100HV1/mm and less than or equal to 1500HV1/mm. In an embodiment, the surface hardness of the body portion 3011e is greater than or equal to 350HV1 and less than or equal to 500HV1, and the surface hardness of the hardened portion 3011f is greater than or equal to 550HV1 and less than or equal to 750HV1; in an embodiment, the surface hardness of the body portion 3011e is greater than or equal to 380HV1 And it is less than or equal to 440HV1, and the surface hardness of the hardened part 3011f is greater than or equal to 600HV1 and less than or equal to 700HV1.

The blade assembly 301 also includes a bearing and a connector or fastener set to fix and connect the blade 3011.

Example 15

51 and 52 respectively show schematic diagrams of the blade assembly 401 and the blade of the lawn mower provided in the fifteenth embodiment of the present application. Compared with the fourteenth embodiment, this embodiment is different in that the blade assembly 401 includes a rotating shaft 4011. The first blade 4012 and the second blade 4013, the first blade 4012 and the second blade 4013 are stacked up and down to form a synchronous rotation around the rotation axis 401'; in one embodiment, the first blade 4012 and the second blade 4013 Stacked up and down to form a non-synchronous rotation around the axis of rotation 401'; in one embodiment, the first blade 4012 and the second blade 4013 rotate around the first axis and the second axis, respectively. The two axes are parallel and do not coincide.

The first blade 4012 includes a first cutting portion 4012d, and the second blade 4013 includes a second cutting portion 4013d. The structural features such as the stiffening part and the body part in the fourteenth embodiment are all applicable to the first blade 4012 and the second blade 4013 in this embodiment.

Claims

[Corrected according to Rule 91 08.07.2020]

A lawn mower, including:

Blade assembly, set to perform cutting function;

A chassis formed with a receiving space for accommodating at least part of the blade assembly;

A motor, configured to drive the blade assembly to rotate about the axis of rotation; and

The battery pack is set to provide a source of power to the motor;

Wherein, the blade assembly includes:

Set as the first cutting part for mowing; and

Set as the second cutting part for mowing;

Wherein, in a direction parallel to the rotation axis, the second cutting portion is located on the lower side of the first cutting portion;

The battery pack includes:

Battery pack housing; and

The battery cell unit is arranged in the battery pack shell;

The maximum value of the length of the line connecting any two points of the projection of the blade assembly in a plane perpendicular to the rotation axis and the projection of the rotation axis in the plane is the rotation diameter of the blade assembly; , The product of the rotating diameter D (mm) of the blade assembly, the number of battery cells contained in the battery pack N, and the mass M (g) of the blade assembly is greater than or equal to 3.5×10 5 (mm ·G) and 7.3×10 7 (mm·g) or less.
[Corrected according to Rule 91 08.07.2020]
The lawn mower according to claim 1, wherein the product of the rotating diameter D (mm) of the blade assembly, the number N of the battery cell unit and the mass M (g) of the blade assembly is greater than or equal to 7×10 5 (mm·g) and 3.6×10 7 (mm·g) or less.
[Corrected according to Rule 91 08.07.2020]
The lawn mower according to claim 2, wherein the product of the rotating diameter D (mm) of the blade assembly, the number N of the battery cell unit and the mass M (g) of the blade assembly is greater than or equal to 1.4×10 6 (mm·g) and 1.8×10 7 (mm·g) or less.
The lawn mower of claim 1, wherein the blade assembly further comprises:

A first blade, the first cutting portion is formed on the first blade; and

A second blade, the second cutting portion is formed on the second blade;

Wherein, the first blade and the second blade are integrally formed or separately formed.
The lawn mower according to claim 1, wherein the output torque of the motor is greater than or equal to 0 and less than or equal to 10 N·m.
The lawn mower according to claim 1, wherein the output torque of the motor is greater than or equal to 3 N·m and less than or equal to 8 N·m.
The lawn mower according to claim 1, further comprising a fan fixedly connected to the output shaft of the motor and rotating about the rotation axis; the fan is installed above the blade assembly and abuts Hold to the blade assembly.
The lawn mower according to claim 1, wherein the chassis is provided with a grass outlet for discharging grass clippings, and when the linear velocity of the cutting edge of the blade assembly is greater than or equal to 40m/s and less than or equal to 100m/s, The average wind speed of the grass outlet is greater than or equal to 3m/s and less than or equal to 25m/s.
The lawn mower according to claim 1, further comprising a control system configured to control the operation of the motor, when the lawn mower is idling, the input power of the motor, the input power of the control system, and the The sum of the input power of the blade assembly is the no-load input power of the lawn mower; the no-load input power is greater than or equal to 100W and less than or equal to 380W.
The lawn mower according to claim 1, wherein the blade assembly is the moment of inertia equal to 8000kg · mm 2 or less 23000kg · mm 2.
The lawn mower according to claim 1, wherein the phase angle formed by the first cutting portion and the second cutting portion is greater than or equal to 0 degrees and less than 90 degrees.
The lawn mower according to claim 1, wherein any two points of the projection of the blade assembly in a plane perpendicular to the rotation axis and the length of a line connecting the projection of the rotation axis in the plane The maximum value of is the rotation diameter D of the blade assembly; the rotation diameter D is greater than or equal to 200 mm and less than or equal to 700 mm.
The lawn mower according to claim 1, wherein the mass of the blade assembly is greater than or equal to 0.35 kg and less than or equal to 1.8 kg.
The lawn mower according to claim 1, wherein the number of the first cutting portions is greater than or equal to 2 and less than or equal to 8; the number of the second cutting portions is greater than or equal to 2 and less than or equal to 8.
The lawn mower according to claim 1, wherein the length of the projection of the first cutting portion in a plane perpendicular to the axis of rotation is greater than or equal to 10 mm and less than or equal to 600 mm; and the second cutting portion is perpendicular to The length of the projection in the plane of the rotation axis is greater than or equal to 10 mm and less than or equal to 600 mm.
The lawn mower of claim 1, wherein the blade assembly includes:

A first blade, the first cutting portion is formed on the first blade; and

A second blade, the second cutting portion is formed on the second blade;

Wherein, when the whole formed by the first blade and the second blade rotates about the axis of rotation, the first cutting part and the second cutting part can perform a mowing function;

The volume of the smallest cylinder surrounding the first blade and the second blade is defined as the sweep volume of the blade assembly. When the blade assembly rotates around the rotation axis, the first cutting portion and the The second cutting parts are all located in the space surrounded by the smallest cylinder;

Wherein the blade assembly is equal to the swept volume greater than 400cm 3 and less than or equal to 8000cm 3.
The lawn mower according to claim 16, wherein the sweep volume of the blade assembly is greater than or equal to 600 cm 3 and less than or equal to 6800 cm 3 .
The lawn mower according to claim 17, wherein the sweep volume of the blade assembly is greater than or equal to 1000 cm 3 and less than or equal to 5000 cm 3 .
The lawn mower according to claim 16, wherein the first blade and the second blade are integrally formed or separately formed.
The lawn mower according to claim 16, wherein the first blade and the second blade are formed separately; the mass ratio of the first blade and the second blade is greater than or equal to 0.5 and less than or equal to 1. .
The lawn mower according to claim 16, wherein any two points of the projection of the first blade in a plane perpendicular to the rotation axis and a line connecting the projection of the rotation axis in the plane The maximum value of the length is the rotation diameter of the first blade; any two points in the projection of the second blade in a plane perpendicular to the rotation axis and the connection of the projection of the rotation axis in the plane The maximum value of the length of the line is the rotation diameter of the second blade; the rotation diameter of the first blade is approximately equal to the rotation diameter of the second blade.
The lawn mower according to claim 16, wherein the projection of the first blade in a plane perpendicular to the rotation axis is perpendicular to the length of a line connecting any two points in the direction of the rotation diameter of the first blade The maximum value of is the width of the first blade, the ratio of the rotation diameter of the first blade to the width of the first blade is greater than or equal to 5 and less than or equal to 13; the second blade is perpendicular to the axis of rotation The maximum value of the length of the line connecting any two points in the plane of the projection perpendicular to the rotation diameter of the second blade is the width of the second blade, and the rotation diameter of the second blade is the same as the second blade The ratio of the width of the blade is greater than or equal to 5 and less than or equal to 13.
The lawn mower according to claim 16, wherein the sum of the number of the first cutting portion and the number of the second cutting portion is the number of cutting portions of the blade assembly, and the sweep volume of the blade assembly is equal to The ratio of the number of cutting parts of the blade assembly is greater than or equal to 50 cm 3 /piece and less than or equal to 4000 cm 3 /piece.
The lawn mower according to claim 1, wherein the motor is configured to drive the blade assembly to rotate around the rotation axis, and the linear velocity of the cutting edge of the blade assembly is greater than or equal to 40 m/s and less than or equal to 100 m/s When the battery pack consumes 100WH of energy, the working time of the lawn mower is defined as the lifetime of the lawn mower in hundred watt-hours, wherein the lifetime of the lawn mower is greater than or equal to 4 min and Less than or equal to 30min.
The lawn mower according to claim 24, wherein the battery life of the lawn mower is greater than or equal to 5 minutes and less than or equal to 20 minutes.
The lawn mower according to claim 25, wherein the hectowatt-hour battery life of the lawn mower is greater than or equal to 6 minutes and less than or equal to 15 minutes.
The lawn mower according to claim 24, further comprising a control system configured to control the operation of the motor, the input power of the motor, the input power of the control system and the The sum of the input power of the blade assembly is the no-load input power of the lawn mower; the no-load input power is greater than or equal to 100W and less than or equal to 380W.
The lawn mower according to claim 24, wherein the blade assembly further comprises a first blade, and the first cutting part and the second cutting part are provided on the integrally formed first blade.
The lawn mower according to claim 24, wherein the ratio of the mass of the first blade to the mass of the second blade is greater than or equal to 0.5 and less than or equal to 1.
The lawn mower according to claim 1, wherein when the motor drives the blade assembly to rotate without load on the axis of rotation, the battery pack consumes 100 WH of energy to operate the lawn mower The duration is defined as the no-load endurance time of the lawn mower, and the no-load endurance time of the lawn mower is greater than or equal to 9 minutes and less than or equal to 35 minutes.
The lawn mower according to claim 30, wherein the idle endurance time of the lawn mower is greater than or equal to 12 minutes and less than or equal to 33 minutes.
The lawn mower according to claim 31, wherein the no-load endurance time of the lawn mower is greater than or equal to 18 minutes and less than or equal to 30 minutes.
The lawn mower of claim 1, further comprising:

A drive shaft connected to the motor and configured to drive the blade assembly to rotate around the rotation axis; and

The installation component has a first installation state in which the blade component is installed to the drive shaft so that the blade component rotates with the drive shaft; the installation component also has a first installation state by installing the first cutting part or the The second cutting part is in a second installed state to perform the cutting function.
The lawn mower according to claim 33, wherein the mounting assembly includes a driving member that drives the blade assembly to rotate about the axis of rotation; the blade assembly is configured to abut against the surface of the driving member and interact with The driving member constitutes a friction transmission; the driving member is connected to the driving shaft.
The lawn mower according to claim 34, wherein the driving member and the blade assembly form a surface contact in a plane perpendicular to the rotation axis; the contact area of the driving member and the blade assembly is greater than or equal to 200mm 2 and less than or equal to 1000mm 2 .
The lawn mower of claim 1, wherein the first cutting portion extends substantially in a first linear direction; and the second cutting portion extends substantially in a first curved direction.
The lawn mower of claim 36, wherein the first cutting portion extends substantially in a second curve direction; the second cutting portion extends substantially in a third curve direction.
The lawn mower according to claim 33, wherein the blade assembly is formed with at least one mounting hole that cooperates with the drive shaft.
The lawn mower according to claim 33, wherein the contact between the mounting assembly and the blade assembly forms at least one mounting surface perpendicular to the axis of rotation; the blade assembly is set to cut at least one The cutting surface of the rotation axis; the mounting surface is located above the cutting surface along the rotation axis direction.
The lawn mower according to claim 33, wherein the blade assembly further comprises a positioning part configured to limit a range of a phase angle formed by the first cutting part and the second cutting part.
The lawn mower according to claim 40, wherein the positioning portion has a geometric center, the distance from the geometric center to the rotation axis is a positioning radius, and the positioning radius is greater than 0 mm and less than or equal to 50 mm.
The lawn mower of claim 1, further comprising:

A drive shaft, connected to the motor and configured to drive the blade assembly to rotate around the rotation axis;

The first type of blade assembly is set to perform the cutting function;

The second type of blade assembly includes a cutting part; and

The mounting assembly has a first mounting state where the first type blade assembly is mounted to the drive shaft so that the first type blade assembly rotates with the drive shaft; the mounting assembly also has a When the blade assembly of the second type is disassembled, the blade assembly of the second type is installed to the second installation state of the drive shaft.
The lawn mower of claim 1, further comprising:

A drive shaft, connected to the motor and configured to drive the blade assembly to rotate around the rotation axis;

The first type of blade assembly is set to perform the cutting function;

The second type of blade assembly includes two cutting parts; and

A mounting assembly having a first mounting state in which the first-type blade assembly is mounted to the drive shaft so that the blade assembly rotates with the drive shaft;

Wherein, the first type blade assembly includes:

A first blade, the first cutting part is formed on the first blade and the first cutting part is configured to cut grass;

The mounting assembly also has a second mounting state in which the first-type blade assembly is removed and the second-type blade assembly is mounted on the drive shaft to perform a cutting function; wherein the second-type blade assembly is The two cutting parts are respectively located on the upper and lower sides of the second-type blade assembly in the direction along the rotation axis.
The lawn mower of claim 1, further comprising:

A drive shaft, configured to drive the blade assembly to rotate around the rotation axis;

The blade assembly includes:

A first blade, the first cutting portion is formed on the first blade;

A second blade, the second cutting portion is formed on the second blade; and

The connecting assembly is configured to connect the second blade to the first blade so that the blade assembly forms a whole that can move together when it is not mounted on the drive shaft; wherein, the connecting assembly is connected to the After the second blade reaches the first blade, in the direction along the rotation axis, the second cutting portion and the first cutting portion are located at different axial positions.
The lawn mower according to claim 44, wherein when the connecting assembly connects the second blade to the first blade, the second blade is fixed within a predetermined angle range relative to the first blade.
The lawn mower according to claim 44, wherein the blade assembly is formed with at least one positioning portion connected to the connection assembly.
The lawn mower according to claim 46, wherein the connection assembly includes a mating part that cooperates with the positioning part.
The lawn mower according to claim 46, wherein the blade assembly includes an even number of the positioning parts arranged symmetrically about the rotation axis.
The lawn mower according to claim 44, wherein the connecting assembly further comprises an axial direction arranged to fix the relative position of the first blade and the second blade in a direction parallel to the rotation axis. Fixed part.
The lawn mower of claim 1, wherein the blade assembly includes:

A first blade formed with the first cutting part; and

A second blade formed with the second cutting part;

Wherein, in the circumferential direction around the rotation axis, the first cutting portion is provided on the front side of the second cutting portion;

The second cutting part is provided on the front side edge of the second blade, and the rear side of the second blade is formed with a first guide part and a second guide part configured to guide the upward movement of the airflow.
The lawn mower according to claim 50, wherein the first guide part and the second guide part both extend along a curved surface; at least part of the first guide part and at least part of the second guide part have a difference The curvature.
The lawn mower according to claim 50, wherein the rear side of the second blade is formed with at least three guide parts including the first guide part and the second guide part.
The lawn mower according to claim 50, wherein the outer side of the first guide portion and the outer side of the second guide portion are formed with a cut portion opening.
The lawn mower of claim 50, wherein the outer side of the first guide portion and the outer side of the second guide portion extend substantially along the same straight line.
The lawn mower according to claim 54, wherein the extension line of the outer side of the first guide part obliquely intersects the extension line of the second cutting part.
The lawn mower of claim 50, wherein:

The radius of curvature of the first guide portion is greater than or equal to 0 and less than or equal to 100 mm; the radius of curvature of the second guide portion is greater than or equal to 0 and less than or equal to 100 mm.
The lawn mower of claim 1, further comprising:

A drive shaft connected to the motor and configured to drive the blade assembly to rotate around the rotation axis;

The blade assembly includes:

A first blade, the first cutting portion is formed on the first blade; and

A second blade, the second cutting portion is formed on the second blade;

Wherein, one of the first blade and the second blade is formed with a positioning portion, and the other is formed with a matching portion that cooperates with the positioning portion;

When the positioning part and the mating part cooperate with each other, the second blade is fixed relative to the first blade in a circumferential direction around the rotation axis or can rotate within a preset angle range.
The lawn mower of claim 57, wherein the preset angle range is greater than or equal to 0 degrees and less than or equal to 20 degrees.
The lawn mower according to claim 57, wherein the positioning portion is a positioning hole or a positioning groove; the matching portion is a protrusion that cooperates with the positioning hole or the positioning groove.
The lawn mower according to claim 57, wherein the positioning portion and the matching portion are symmetrically arranged about the rotation axis.
The lawn mower of claim 1, further comprising:

A drive shaft connected to the motor and configured to drive the blade assembly to rotate around the rotation axis;

The blade assembly further includes:

A first blade, the first cutting portion is formed on the first blade;

A second blade, the second cutting portion is formed on the second blade; and

The connecting assembly is configured to connect the blade assembly so that the second blade is fixed relative to the first blade in a circumferential direction around the rotation axis or rotates within a preset angle range.
The lawn mower according to claim 61, wherein the connecting assembly is formed with a first connecting part connecting the first blade and a second connecting part connecting the second blade.
The lawn mower according to claim 61, wherein the connecting assembly includes a pressing member for axially clamping the blade assembly, and the pressing member is connected to the blade assembly and is connected to the blade assembly. Make surface contact.
The lawn mower according to claim 1, wherein the blade assembly includes a first blade, and the first cutting part and the second cutting part are both provided on the first blade.
The lawn mower of claim 61, further comprising:

A mounting assembly, configured to mount the blade assembly to the drive shaft;

The installation components include:

A driving member configured to drive the blade assembly to rotate around the rotation axis, and the blade assembly is detachably connected to the driving member; and

The driving part is fixedly connected to the driving part or integrally formed with the driving part; the driving part is configured to connect the blade assembly so that the blade assembly is formed in the circumferential direction of the rotation axis relative to the driving part The fixed connection is or is arranged so that the blade assembly can rotate within a preset angle range relative to the driving member along the circumferential direction of the rotation axis.
The lawn mower of claim 65, wherein the mounting assembly further comprises:

A pressing assembly configured to clamp the blade assembly along the direction of the rotation axis, the blade assembly being arranged between the driving member and the pressing assembly in a direction parallel to the rotation axis; and

A fastening component is arranged to fix the position of the blade component relative to the driving part in a direction parallel to the rotation axis, and the fastening component is detachably connected to the driving shaft.
The lawn mower according to claim 66, wherein the mounting assembly further comprises an insulating member configured to insulate between the blade assembly and the drive shaft; the insulating member is made of insulating material The insulating member is arranged between the pressing assembly and the blade assembly along the rotation axis direction.
The lawn mower of claim 67, wherein the first blade and the second blade are both provided between the driving member and the insulating member.
The lawn mower according to claim 67, wherein the first blade is provided between the driving member and the insulating member; the second blade is provided between the insulating member and the pressing assembly between.
The lawn mower according to claim 65, wherein the driving member is a fan or a flange.
The lawn mower of claim 66, wherein the pressing component includes a metal washer; and the fastening component includes a bolt or a combination of a screw and a nut.
The lawn mower of claim 1, further comprising:

A host with the blade assembly installed;

An operating device, which is set to be operated by a user to control the host;

The connecting rod assembly includes a connecting rod connecting the host and the operating device;

The lighting assembly includes a lighting element and a lighting switch configured to be operated by a user to control the lighting element; and

The status display component includes a status display lamp that can display the working status of the lawn mower;

Wherein, the area defined at the first end of the connecting rod assembly is the operating area, the area at the second end of the connecting rod assembly is the working area, the operating device is located in the operating area, and the host is located at Within the working area;

The lighting element is located in the working area and installed to the host, and the lighting switch and the status display lamp are located in the operating area.
The lawn mower of claim 72, wherein the number of the connecting rod is two; the connecting rod assembly further comprises:

An armrest, configured to connect the two connecting rods and located at one end of the connecting rod away from the host;

The operating device also includes:

An operating console, which is configured to connect the two connecting rods and is located between the armrest and the host;

The lighting switch and the status display lamp are arranged on the operating table.
The lawn mower according to claim 73, wherein the operating device comprises a trigger, the trigger is connected to the operating table, and the trigger is provided for a user to operate to activate the lawn mower; the lighting switch And the status display light is located between the trigger and the host.
The lawn mower according to claim 74, wherein a safety switch is further provided on the operation console, and the lawn mower is in a stopped state when one of the safety switch and the trigger is not triggered; The lighting switch and the status display lamp are respectively located on both sides of the safety switch.
The lawn mower according to claim 72, wherein the number of the connecting rods is two, and the two connecting rods are respectively arranged symmetrically on both sides of a preset plane; the lighting switch and the status display lamp They are respectively arranged on both sides of the preset plane.
The lawn mower of claim 72, wherein the number of the connecting rod is two; the connecting rod assembly further comprises:

An armrest, configured to connect the two connecting rods and located at one end of the connecting rod away from the host;

The armrest includes a cross bar extending in a direction perpendicular to the connecting rod; the minimum distance between the lighting switch and the cross bar is greater than or equal to 0 cm and less than or equal to 30 cm.
The lawn mower of claim 72, wherein the light switch is a membrane switch.
The lawn mower according to claim 72, wherein the battery pack is installed to the host; and the status display lamp is set as a power status display lamp that shows whether the remaining power of the battery pack is less than a preset power.
The lawn mower of claim 1, further comprising:

A set of walking wheels, symmetrically arranged on both sides of the first plane;

The chassis includes:

The vortex part is arranged to extend along the circumferential direction around the rotation axis to form a vortex in the accommodation space;

A lead-out part is arranged on the circulation path of the vortex to guide the vortex to flow out in the tangential direction of the vortex; and

A stopper, configured to prevent at least part of the vortex from continuing to circulate in the vortex when flowing through the lead-out part;

Wherein, at least a part of the stop part and at least a part of the lead-out part are located on the same side of the first plane.
The lawn mower according to claim 80, wherein the stopper portion is formed with a stopper surface configured to stop the airflow, and at least a part of the stopper surface and at least a part of the lead-out portion are located in the first The same side of the plane.
The lawn mower according to claim 81, wherein the stop surface and the lead-out portion are both located on the same side of the first plane.
The lawn mower of claim 81, wherein the stop surface and at least a part of the lead-out portion are located on the same side of the first plane.
The lawn mower according to claim 80, wherein the motor includes a motor shaft configured to drive the blade assembly to rotate; the chassis is further formed with a mounting hole through which the motor shaft passes; In the direction of the first plane, at least part of the stop portion is located between the lead-out portion and the mounting hole.
The lawn mower according to claim 80, wherein the stop part and the lead-out part are both arranged to pass through the rotation axis and located on the same side of a second plane perpendicular to the first plane.
The lawn mower according to claim 80, wherein the ratio of the length of the stop portion in the direction along the rotation axis to the depth of the vortex portion in the direction along the rotation axis is greater than or equal to 0.1 and Less than or equal to 0.5.
The lawn mower of claim 81, wherein the vortex part comprises:

The inner ring is arranged around the rotation axis; and

An outer ring is arranged around the inner ring, and a circulation path of the vortex part is formed between the outer ring and the inner ring;

The derivation part includes:

The first lead-out surface is connected to the inner ring; and

The second lead-out surface is connected to the outer ring;

The stop surface is arranged at the first lead-out surface.
The lawn mower according to claim 87, wherein the stop surface extends from the inner ring to the outer ring; the vortex part further comprises a bottom surface connecting the inner ring and the outer ring, so The stop portion further includes a connecting surface, the connecting surface is arranged to extend from a side of the stop surface away from the bottom surface along a plane obliquely intersecting the stop surface, and the connecting surface is connected to the stop面 and said bottom surface.
The lawn mower according to claim 80, wherein the stop part and the vortex part are integrally formed.
The lawn mower of claim 80, wherein the stop part is located in the vortex part, and the stop part is located at an edge of the lead-out part.
The lawn mower according to claim 1, wherein the blade assembly further comprises a first blade and a second blade that realize a cutting function;

Wherein, the first blade is located above the second blade with respect to the ground; the first blade is located in front of the second blade in the direction of rotation along the rotation axis; the first cutting part is provided At the front edge of the end of the first blade; the second cutting part is provided at the front edge of the end of the second blade;

The first blade further includes:

The giving way edge is arranged at the rear edge of the end of the first blade; the giving way edge is inclined or curved relative to the trailing edge of the first blade; in the direction of rotation, the giving way edge is located The front of the second cutting part; the projection of the relief edge on the ground and the projection of the second cutting part on the ground do not intersect.
The lawn mower according to claim 91, wherein the yield edge and the trailing edge of the first blade form a continuous curve having at least one bending point, and the projection of the bending point on the ground is along the The direction in which the rotation axis rotates is located in front of the projection of the second cutting portion on the ground.
The lawn mower according to claim 92, wherein the lateral distance from the projection of the bending point in the plane of the second blade to the second cutting part is greater than zero.
The lawn mower according to claim 91, wherein the length of the relief edge is greater than or equal to 40 mm and less than or equal to 150 mm.
The lawn mower according to claim 91, wherein the length of the relief edge is greater than or equal to 70 mm and less than or equal to 100 mm.
The lawn mower according to claim 91, wherein the blade assembly further comprises a connecting assembly, and the first blade and the second blade respectively comprise a first mounting part and a first mounting part which are fixedly connected with the connecting assembly. 2. Installation department.
The lawn mower according to claim 91, wherein the second blade comprises two uplifting parts, and the two uplifting parts are respectively disposed on the rear edges of both ends of the second blade and are uplifted.
The lawn mower according to claim 91, wherein the angle between the extension line of the giving way and the extension line of the second cutting portion is greater than or equal to 15 degrees and less than or equal to 45 degrees.
The lawn mower of claim 98, wherein the angle between the extension line of the giving way and the extension line of the second cutting portion is greater than or equal to 25 degrees and less than or equal to 35 degrees.