WO2020063609A1 - 割草机 - Google Patents
割草机 Download PDFInfo
- Publication number
- WO2020063609A1 WO2020063609A1 PCT/CN2019/107650 CN2019107650W WO2020063609A1 WO 2020063609 A1 WO2020063609 A1 WO 2020063609A1 CN 2019107650 W CN2019107650 W CN 2019107650W WO 2020063609 A1 WO2020063609 A1 WO 2020063609A1
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- WO
- WIPO (PCT)
- Prior art keywords
- blade
- assembly
- lawn mower
- blade assembly
- cutting
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
- A01D34/67—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator
- A01D34/68—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator with motor driven cutters or wheels
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
- A01D34/73—Cutting apparatus
Definitions
- the present application relates to an electric machine, for example, to a lawn mower.
- mowing requires the use of simple and efficient mowing machinery to complete the mowing task with quality and quantity.
- Lawn mowers have been widely used in the construction of various types of lawns.
- the blades of the lawn mowers are used as functional elements.
- the structural design of the blades has greatly affected the cutting performance of the lawn mowers.
- the lawn mower can be divided into engine drive and motor drive.
- a motor-driven lawn mower generally uses a battery pack as an energy source, and has the advantages of low noise and cleaner.
- the motor-driven lawnmower in the related art has a large load on the motor and a low cutting efficiency due to the irrational setting of the blade structure.
- the present application provides a lawn mower with a smaller motor load and higher cutting efficiency.
- An embodiment provides a lawn mower, comprising: a blade assembly configured to perform a cutting function; a chassis formed with a receiving space for receiving at least a portion of the blade assembly; and a motor configured to drive the blade assembly with a rotation axis as A shaft rotates; and a battery pack configured to provide a source of power to the motor; wherein the blade assembly includes: a first cutting portion configured to cut grass; and a second cutting portion configured to cut grass; In a direction parallel to the rotation axis, the second cutting portion is located below the first cutting portion; the battery pack includes: a battery pack case; and a battery cell unit disposed in the battery pack case In vivo; the maximum value of the length of the line connecting 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 rotation diameter D (mm) of the blade assembly, the number N of battery cells included in the battery pack, and the mass M (g) of the blade assembly
- FIG. 1 is a schematic diagram of a lawn mower provided in Embodiment 1;
- FIG. 1 is a schematic diagram of a lawn mower provided in Embodiment 1;
- FIG. 2 is a plan view of a part of the structure of the lawnmower in FIG. 1;
- FIG. 3 is a perspective view of a part of the structure of the lawnmower in FIG. 1;
- FIG. 4 is a plan view of a partial structure of a blade assembly of the lawnmower of FIG. 1;
- FIG. 5 is a cross-sectional view of a part of the structure of the lawnmower in FIG. 1, wherein the mounting assembly is in a first installation state;
- FIG. 6 is an exploded view of a part of the structure of the lawnmower in FIG. 1;
- FIG. 7 is a schematic diagram of a part of the structure of the lawnmower provided in the first embodiment, in which the installation component is in a second installation state;
- FIG. 8 is a schematic diagram of a part of the structure of the lawnmower provided in the first embodiment, wherein the installation component is in a second installation state;
- FIG. 9 is an exploded view of the blade assembly of the lawnmower of FIG. 1;
- FIG. 10 is a schematic diagram of a first blade and a second blade of the lawnmower of FIG. 1;
- FIG. 11 is a schematic diagram of a part of a structure of a lawnmower provided in Embodiment 2;
- FIG. 12 is a schematic diagram of a blade assembly and a connection assembly of a lawn mower provided in Embodiment 3;
- FIG. 13 is a schematic diagram of a blade assembly of a lawn mower provided in Embodiment 4.
- FIG. 14 is a plan view of the blade assembly in FIG. 13;
- FIG. 15 is a plan view of a 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;
- FIG. 17 is a schematic diagram of a partial structure of a lawnmower provided in Embodiment 5;
- FIG. 18 is a cross-sectional view of the structure in FIG. 17;
- FIG. 19 is an exploded view of a part of the structure of the lawnmower in FIG. 17;
- FIG. 20 is a schematic diagram of a part of a structure of a lawnmower provided in Embodiment 6;
- FIG. 21 is a plan view of a blade assembly and a mounting assembly of a lawn mower provided in Embodiment 6;
- FIG. 22 is an exploded view of a part of the structure of the lawnmower in FIG. 20;
- FIG. 23 is a schematic diagram of a part of a structure of a lawnmower provided in Embodiment 7;
- FIG. 24 is a sectional view of the structure in FIG. 23;
- FIG. 25 is an exploded view of the structure in FIG. 23;
- 26 is a schematic diagram of a part of a structure of a lawnmower provided in Embodiment 8.
- FIG. 27 is a schematic diagram of a lawnmower connected to a grass pressing component according to a ninth embodiment
- FIG. 28 is a perspective view of the grass pressing component in FIG. 27; FIG.
- Figure 29 is a plan view of the grass pressing assembly of Figure 27;
- FIG. 30 is a cross-sectional view of the grass pressing assembly of FIG. 27;
- FIG. 31 is a schematic diagram of a grass pressing component connected to a lawn mower provided in Embodiment 10; FIG.
- FIG. 32 is a perspective view of a lawn mower provided in the eleventh embodiment.
- FIG. 33 is a bottom view of the lawn mower in FIG. 32; FIG.
- FIG. 34 is a circuit system diagram of the lawnmower in FIG. 32;
- 35 is a schematic diagram of a connection between a first signal line of the lawnmower of FIG. 32 and a first output circuit board and a second output circuit board;
- FIG. 36 is a circuit system diagram of the lawnmower provided in the twelfth embodiment.
- FIG. 37 is a schematic diagram of a part of the structure of the lawnmower in FIG. 32;
- Figure 38 is a perspective view of a chassis in the lawnmower of Figure 32;
- Figure 39 is a plan view of the chassis of Figure 38;
- FIG. 40 is a cross-sectional view of the chassis in FIG. 39 taken along the line V-V;
- FIG. 41 is a perspective view of the chassis in FIG. 38 when a plug is connected;
- FIG. 42 is a schematic diagram of a lawn mower provided in Embodiment 13; FIG.
- Figure 43 is a perspective view of the lawn mower in Figure 42;
- FIG. 44 is a plan view of the blade assembly of the lawn mower of FIG. 42; FIG.
- FIG. 45 is an exploded view of the blade assembly in FIG. 44;
- FIG. 46 is a plan view of a partial structure of the blade assembly in FIG. 45;
- FIG. 47 is a schematic diagram of a lawn mower provided by Embodiment 14; FIG.
- Figure 48 is a perspective view of the blade assembly of the lawnmower of Figure 47;
- FIG. 49 is a plan view of a blade of the blade assembly in FIG. 48; FIG.
- 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 according to a fifteenth embodiment
- FIG. 52 is a plan view of a blade of the blade assembly in FIG. 51.
- FIG. 1 is a schematic diagram of a lawnmower 100 provided in Embodiment 1 of the present application.
- the lawnmower 100 in the present application may be a hand-held lawnmower or a riding lawnmower.
- a motor-driven hand-held lawnmower is taken as an example for description.
- All “components” in this application refer to a combination including at least one component. This combination implements a specific function through interaction or cooperation. .
- the vertical direction as shown in FIG. 1 is set.
- 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 lawnmower 100;
- the chassis 12 is formed with an accommodation space that accommodates at least part of the blade assembly 11.
- the blade assembly 11 is located inside the accommodation space;
- the motor 13 drives the blade assembly 11 to rotate
- the axis 100 ′ is a shaft rotation.
- the motor 13 is located above the chassis 12 and forms a coaxial rotation with the blade assembly 11 with the rotation axis 100 ′ as an axis.
- 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, and a transmission mechanism may be provided between the motor 13 and the blade assembly 11 Transmission is performed so that the motor 13 and the drive shaft 14 constitute non-coaxial rotation.
- the battery pack provides a source of power for the motor 13.
- the lawn mower 100 further 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 '.
- the battery pack consumes 100 WH of energy and the lawn mower 100
- the working time is defined as the 100-watt-hour endurance time of the lawnmower 100.
- the 100-watt-hour endurance time of the lawnmower 100 is greater than or equal to 4 min and less than or equal to 30 minutes. 5 minutes or more and 20 minutes or less; in other embodiments, the 100-watt-hour endurance time of the lawnmower 100 is 6 minutes or more and 15 minutes or less. In this embodiment, the 100-watt-hour battery life of the lawnmower 100 is about 12 minutes.
- the lawnmower 100 in this embodiment has a blade assembly 100 with a better structural design, a smaller load, and a higher cutting efficiency, the lawnmower 100 has a 100-watt-hour endurance time in the above range during operation, thereby making the mowing The lawnmower 100 has high cutting performance.
- the battery pack here only refers to a battery pack that provides power to the motor 13 that drives the blade assembly 11 to rotate.
- the working time of the lawnmower 100 under the battery pack consuming 100WH is defined as the no-load endurance time of the lawnmower 100.
- 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 min and less than or equal to 33 min; in other embodiments, the no-load endurance time of the lawn mower 100 18min or more and 30min or less. In this embodiment, the dead time of the lawnmower 100 is about 22 minutes.
- the lawnmower 100 in this embodiment has a blade assembly 100 with a better structural design, a smaller load, and a higher cutting efficiency, and a reasonable setting of no-load conditions, the mower 100 has a no-load in the above range during operation. Endurance time, so that the work performance of the lawn mower 100 is better.
- the blade assembly 11 includes a first blade 111 and a second blade 112, and the first blade 111 and the second blade 112 are respectively formed with a first cutting portion 111 a and a second cutting portion provided for mowing. 112a.
- the first cutting portion 111a and the second cutting portion 112a perform mowing.
- the cutting part refers to a structure having a cutting function for cutting vegetation, and may be a common cutting part or a cutting structure different from the cutting part.
- a cutting section refers to a unitary or continuous structure.
- the second cutting portion 112a is located below but not limited to the first cutting portion 111a; or the second cutting portion 112a and the first cutting portion 111a are at least partially in the same plane.
- 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 in a direction parallel to the rotation axis 100 'relative to the ground.
- the first blade 111 and the second blade 112 constitute 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 an axis.
- the lawnmower 100 also includes a control system configured to control the operation of the motor 13.
- a control system configured to control the operation of the motor 13.
- 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 lawnmower 100.
- Control input power; no-load input power is 100W or more and 380W or less. In this embodiment, no-load input power is 200W or more and 300W or less.
- no-load means that the blade assembly 11 of the lawnmower 100 rotates at a preset speed under atmospheric pressure, and the blade assembly 11 has no external load.
- the volume of the smallest cylinder 11 'surrounding the first blade 111 and the second blade 112 is defined as the sweep volume of the blade assembly 11.
- the first cutting portion 111a and the second cutting The portions 112a are all located in a space surrounded by the smallest cylinder 11 '.
- a rectangle indicated by a dashed line is a plan view of a cylinder 11 'enclosing the first blade 111 and the second blade 112 in this embodiment.
- the swept volume of the blade assembly 11 is the volume of the cylinder 11 ′, and the volume of the cylinder 11 ′ is approximately the diameter of the rotation of the blade assembly 11 as a diameter (refer to FIG. 4).
- the maximum height in the direction of the axis of rotation 100 ' is the volume of the tall cylinder 11'.
- the rotation diameter D of the blade assembly 11 is the maximum value of the length of a line connecting the projection of the blade assembly 11 in a plane perpendicular to the rotation axis 100 'and the projection line of the rotation axis 100' in the plane.
- 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 driving shaft 14, the first blade 111 is located on the second blade 112.
- the swept volume of the blade assembly 11 is about the maximum value of the 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 parallel to the rotation axis 100 ′.
- the maximum value of the sum of the heights is the volume of the tall cylinder 11 '.
- the heights of the first blade 111 and the second blade 112 are 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 mounted on the drive shaft 14, respectively.
- the blade assembly 11 is greater than the swept volume of 400cm 3 and equal to or less 8000cm 3.
- the sweep volume of the blade assembly 11 is kept within this range, the lawn mower 100 has a smaller load, or when the sweep volume of the blade assembly 11 is kept within this range, the lawn mower 100 has a smaller load
- the double blades ensure the cutting performance of the lawnmower 100, so that the lawnmower 100 has a higher cutting efficiency.
- the blade assembly 11 is greater than the swept volume of 600cm 3 and equal to or less 6800cm 3, in one embodiment, the blade assembly 11 is greater than the swept volume of equal to or less 1000cm 3 5000cm 3.
- the structure of the blade assembly is not limited to the structure in this embodiment.
- the blade assembly may include only one blade; both the first cutting portion and the second cutting portion are disposed on the blade.
- the cutting portion is located below the first cutting portion, but is not limited to directly below; the first cutting portion and the second cutting portion may be integrally formed or connected with other structures to form a complete blade.
- the blade assembly includes a blade body, and the first cutting portion and the second cutting portion are respectively disposed on a plurality of fins extending from the blade body, and the plurality of fins and the blade body form a fixed connection or are integrally formed or detachably connected.
- the phase angle ⁇ formed by the first cutting portion 111 a and the second cutting portion 112 a is 0 or more and less than 90 degrees.
- the phase angle ⁇ is the angle between the straight line where the edge 111b of the first cutting portion 111a and the edge 112b of the second cutting portion 112a are projected in a plane perpendicular to the rotation axis 100 '.
- the cutting edge 111b of the first cutting portion 111a is the edge forming the foremost side of the first cutting portion 111a, that is, the edge that first contacts the vegetation when the first blade 111 is rotated in the rotation direction A with the rotation axis 100 'as the axis.
- the cutting edge 112b of the second cutting portion 112a is the edge forming the foremost side of the second cutting portion 112a, that is, when the second blade 112 is rotated in the rotation direction A with the rotation axis 100 'as the axis, the first contact To the edge of the vegetation.
- the phase angle of the first cutting portion 111a and the second cutting portion 112a is within the above range, the first cutting portion 111a and the second cutting portion 112a as a whole have higher cutting efficiency.
- the phase angle ⁇ formed by the first cutting portion 111a and the second cutting portion 112a is 10 degrees or more and 60 degrees or less. In this embodiment, the phase angle ⁇ 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.
- the first cutting portion 111 a can be considered as a continuous cutting portion formed on the first blade 111.
- the first blade 111 and the second blade 112 include at least two first cutting portions 111a and at least two second cutting portions 112a, respectively.
- two first cutting portions 111a are formed on the first blade 111, and the two first cutting portions 111a are respectively disposed on both ends of the first blade 111, and are disposed on the front side of the rotation direction A.
- the first blade 111 rotates in the rotation direction A with the rotation axis 100 'as the axis, the first blade 111 first contacts the side of the vegetation; the two first cutting portions 111a are symmetrical about the rotation axis 100'.
- the second blade 112 also includes at least one second cutting portion 112a. In this embodiment, two second cutting portions 112a are formed on the second blade 112, and the two second cutting portions 112a are respectively disposed on the second blade 112.
- Both ends are disposed on the front side of the rotation direction A, that is, when the second blade 112 is rotated in the rotation direction A with the rotation axis 100 'as the axis, the side that first contacts the vegetation; the two second cutting portions 112a It is center symmetrical about the rotation axis 100 '.
- the sum of the number of the first cutting portions 111a formed by the first blade 111 and the number of the second cutting portions 112a formed by the second blade 112 (in units) is defined as the number of cutting portions of the blade assembly 11.
- the ratio of the scanning volume of the component 11 and the blade component 11 to the number of cutting portions is 50 cm 3 / piece or more and 4000 cm 3 / piece or less. In one embodiment, the ratio of the swept volume of the blade assembly 11 to the number of cutting portions is greater than or equal to 75 cm 3 / piece and less than or equal to 3400 cm 3 / piece.
- the discontinuous first cutting portion 111a is regarded as a plurality of different first cutting portions 111a, and the number of the first cutting portions 111a is a discontinuous first portion provided on the first blade 111.
- the ratio of the scanning volume of the blade assembly 11 to the number of cutting portions is about 1700 cm 3 / piece.
- the ratio of the sweeping volume of the blade assembly 11 to the number of cutting sections is maintained within the above-mentioned optimal range, thereby ensuring that the lawnmower 100 maintains a better cutting under the condition of a smaller load. performance.
- the lawnmower 100 further includes a mounting assembly 16 having a first mounting state in which the blade assembly 11 is mounted on the driving shaft 14 to rotate the blade assembly 11 with the driving shaft 14 and the first blade 111
- a mounting assembly 16 having a first mounting state in which the blade assembly 11 is mounted on the driving shaft 14 to rotate the blade assembly 11 with the driving shaft 14 and the first blade 111
- One of the first and second cutting portions 111a and 112a is detached from one of the second blades 112, and only the other of the first and second cutting portions 111a and 112a is mounted to perform a second mounting state of the cutting function.
- the mounting assembly 16 since the first cutting portion 111 a and the second cutting portion 112 a are respectively provided on the separately formed first and second blades 111 and 112, the mounting assembly 16 has The blade assembly 11 is mounted to the driving shaft 14 in a first mounting state where the blade assembly 11 rotates with the driving 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 mounted The other one of 112 is in a second mounting state for performing a cutting function. That is, 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 the 111 and the second blade 112 is mounted to the drive shaft 14.
- 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 blade assembly 11, which further enhances the practicality of mowing.
- the mounting assembly 16 has a first mounting state in which a first-type blade assembly including a first cutting portion and a second cutting portion is mounted to a drive shaft, and the mounting assembly also has a first-type blade assembly A second type blade assembly including only one cutting portion can be mounted to the second mounting state of the drive shaft.
- the mounting assembly Based on the structure in which the first cutting portion and the second cutting portion are respectively provided on the first blade and the second blade, that is, the mounting assembly has a structure of mounting a first type blade assembly including the first blade and the second blade to In the first mounting state of the driving shaft, the mounting assembly also has a second mounting state in which the second type blade assembly including only one blade can be mounted to the driving shaft when the first type blade assembly is removed.
- the mounting assembly 16 can not only independently install one or two of the first blade and the second blade, but also independently install other blades not belonging to the first blade and the second blade.
- the lawnmower 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 a first-type blade assembly is mounted to a drive shaft so that the blade assembly rotates with the drive shaft; the mounting assembly also has a second type that removes the first-type blade assembly and includes two cutting sections The blade assembly is mounted to the drive shaft to perform a second mounting state of the cutting function; wherein the two cutting portions of the blade assembly of the second type are respectively located on the upper and lower sides in the direction of the rotation axis.
- the mounting assembly enables the lawn mower to switch from a first type blade assembly having one cutting portion to a second type blade assembly having two cutting portions, and the two cutting portions are respectively located in the direction of the rotation axis. Up and down sides.
- 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 may be formed to be completely different from the first type.
- Blade assembly The second type of blade assembly. When the second-type blade assembly includes the first cutting portion of the first-type blade assembly, the position of the first cutting portion relative to the driving shaft may be unchanged or changed.
- the first type of blade assembly includes a first blade provided with a first cutting portion
- the second type of blade assembly adds a second blade provided with a second cutting portion in addition to the first type of blade assembly
- the second The blade is mounted to the lower side or the upper side of the first blade through the mounting component in the direction of the rotation axis.
- the lawnmower includes a blade assembly and a lawnmower body.
- the lawnmower body includes a chassis, a motor, and a battery pack.
- the motor is mounted to the chassis, and the battery pack provides power to the motor.
- the blade assembly includes a first type blade assembly and a second type blade assembly, and the motor drives the first type blade assembly or the second type blade assembly to rotate around an axis of rotation;
- the first type blade assembly includes a first blade, and the first blade is formed with A first cutting part for mowing;
- a second type blade assembly includes a first blade and a second blade, the first blade is formed with a first cutting part for mowing the grass;
- the second blade is formed with a second cutting part provided for mowing;
- the main body of the lawnmower can be adapted to the first type blade assembly or the second type blade assembly.
- the main body of the lawnmower may be adapted to install a second type
- the blade assembly 11 in this embodiment is driven by friction.
- the mounting assembly 16 includes a driving member 161.
- the driving member 161 is configured to drive the blade assembly 11 to rotate around 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 driving member 161 and the blade assembly 11 are driven by static friction.
- the driving member 161 is a flange.
- the flange and the driving shaft 14 form a fixed connection in the radial direction.
- the blade assembly 11 is in a plane perpendicular to the rotation axis 100 ′. Make surface contact with the flange.
- the mounting assembly 16 further includes a compression assembly 162.
- the compression assembly 162 is configured to compress the blade assembly 11 to the surface of the driving member 161 in the direction of the rotation axis 100 ′.
- the compression assembly 162 is mounted to the driving shaft 14 and is A fixed and detachable connection is formed in the direction along the axis of rotation 100 '.
- a flat position fit is formed between the driving shaft 14 and the flange, and the compression assembly 162 includes a bolt 162a and a first washer 162b.
- the flange, the blade assembly 11, the first washer 162b, and the bolt 162a closely fit from top to bottom along the rotation axis 100 ', wherein the flange, the blade assembly 11 and the first washer 162b are fitted to the drive shaft 14, and the bolt 162a It is inserted into the drive shaft 14 and forms a screw connection with the drive shaft 14.
- the bottom surface of the driving member 161 is closely attached to the upper surface of the blade assembly 11.
- the first washer 162b and the drive shaft 14 also form a flat position fit.
- the mounting assembly 16 is in a second mounting state.
- the mounting assembly 16 further includes a fan 15.
- the fan 15 is fixedly connected to the driving member 161 and is sleeved on the outside of the driving member 161 to form a coaxial connection with the driving member 161.
- the fan 15 is driven by a driving member 161.
- the driving member 161 is formed with a driving portion 161a (shown in FIG. 5) that drives the fan 15.
- the driving portion 161a projects radially from the driving member 161.
- the fan 15 is formed with the driving portion 161a. Forms a tight fit groove. In the direction of the rotation axis 100 ′, 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 on the driving shaft 14, the fan 15 and the blade assembly 11 make surface contact. The lower surface of the fan 15 abuts against the upper surface of the blade assembly 11, and the fan 15 and the blade assembly 11 constitute a friction drive.
- the connection between the mounting assembly 16 and the blade assembly 11 may be adopted 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 by the pressing component 162.
- the pressing assembly 162 includes a fan 15 and a second gasket 162c.
- the structure of the mounting assembly 16 and the connection manner between the mounting assembly 16 and the blade assembly 11 are not limited to the above embodiments.
- 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 mounting assembly 16 of the present application, the installation state switching can be realized should be considered to be within the protection scope of the present application.
- the mounting assembly 16 may include a plurality of parts. When the mounting assembly 16 is in a first mounting state and a second mounting state, the mounting assembly 16 may include different parts.
- the driving member 161 makes surface contact with the blade assembly 11 in a plane perpendicular to the rotation axis 100 ′; the contact area between the driving member 161 and the blade assembly 11 is 100 mm 2 or more and 1000 mm 2 or less. In one embodiment, the contact area between the driving member 161 and the blade assembly 11 is 300 mm 2 or more and 500 mm 2 or less. In this embodiment, the contact area between the flange and the blade assembly 11 is approximately 432 mm 2 , and the contact area between the lower surface of the flange and the upper surface of the blade assembly 11 is approximately 432 mm 2 .
- the fan 15 and the blade assembly 11 form surface contact in a plane perpendicular to the rotation axis 100 ′; the fan 15 and the blade assembly 11
- the contact area is 100 mm 2 or more and 1000 mm 2 or less.
- the blade assembly 11 is formed with at least one mounting hole 113 that cooperates with the driving shaft 14.
- the blade assembly 11 when the blade assembly 11 constitutes a whole that can be moved together, the blade assembly 11 is formed with only one mounting hole 113 that cooperates with the drive shaft 14 to facilitate installation by a user.
- the mounting hole 113 is located approximately at the center of the blade assembly 11.
- the blade assembly 11 is center-symmetrical with respect to the center of the mounting hole 113, so that the blade assembly 11 is more stable when rotating around the rotation axis 100 ', and avoids eccentric moment.
- the first blade 111 and the second blade 112 are formed with a first mounting hole 113a and a second mounting hole 113b, respectively.
- the blade assembly 11 When the blade assembly 11 is mounted on the driving shaft 14, the first mounting hole 113a and the second The mounting holes 113b overlap each other in the direction of the rotation axis 100 '.
- 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 mating with the mounting holes 113, and the connecting shafts are connected to the driving shaft 14.
- the mounting assembly 16 contacts the blade assembly 11 to form at least one mounting surface 16a substantially perpendicular to the rotation axis 100 '; the blade assembly 11 is formed with at least one cutting surface 11a perpendicular to the rotation axis 100'; One mounting surface 16a is located above the cutting surface 11a in the direction of the rotation axis 100 '.
- the flange or fan 15 of the mounting assembly 16 and the first gasket 162b are in surface contact with the blade assembly 11 and two mounting surfaces 16a perpendicular to the rotation axis 100 'are formed.
- the blade assembly 11 When the blade assembly 11 includes the first When there is a blade 111 or a second blade 112, the first blade 111 or the second blade 112 rotates around the rotation axis 100 'to form a cutting surface 11a, and the plane on which the cutting surface 11a is located is the edge 111b of the first cutting portion 111a or The plane where the cutting edge 112b of the second cutting portion 112a is located; when the blade assembly 11 includes the first blade 111 and the second blade 112, the first blade 111 and the second blade 112 rotate around the rotation axis 100 'to form two upper and lower parts.
- the planes on which the parallel cutting surface 11a and the upper and lower cutting surfaces 11a are respectively the planes on which the cutting edge 111b of the first cutting portion 111a and the cutting edges 112b of the second cutting portion 112a are located.
- one mounting surface 16a is located above the two cutting surfaces 11a along the direction of the rotation axis 100 ', and it is avoided to install the mounting component 16 below the cutting surface 11a.
- the driving member 161 that drives the blade assembly 11 to rotate is located above the cutting surface 11a.
- the blade assembly 11 further includes a connection assembly 114.
- the connection assembly 114 connects the second blade 112 to the first blade 111 so that the blade assembly 11 forms a whole that can move together when it is not installed on the drive shaft 14.
- the connecting component 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 connection assembly 114.
- the first blade 111 and the second blade 112 may form a fixed connection or a movable connection.
- the first blade 111 may move relative to the second blade 112.
- the connecting component 114 determines the relative position of the first cutting portion 111a and the second cutting portion 112a along the direction of the rotation axis 100 '.
- the first cutting portion 111a is located above the second cutting portion 112a.
- the first blade 111 is located above the second blade 112.
- connection assembly 114 enables the blade assembly 11 to be disassembled by the user as a whole, which is convenient for operation.
- the relative axial positions of the first cutting portion 111a and the second cutting portion 112a are also fixed, avoiding the user cutting the two cutting parts during assembly
- the axial repositioning of the part also prevents the user from installing the first blade 111 and the second blade 112 upside down or wrongly, which prevents fools.
- the second blade 112 When the connecting component 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.
- 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 5 degrees or more and 10 degrees or less. That is to say, the connection 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 a movable connection in the rotational axis.
- the first blade 111 and the second blade When 112 constitutes a movable connection in the axial direction the first blade 111 can rotate relative to the second blade 112 by a rotation angle of 0 ° or more and 10 ° or less.
- the first blade 111 and the second blade 112 form a detachable connection through the connection component 114, which facilitates maintenance or replacement of the blade component 11 at a later stage.
- connection 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 component 114.
- the positioning portion 115 can limit the range of the phase angle of the first blade 111 relative to the second blade 112, and the connecting component 114 is mounted to the positioning portion 115.
- the positioning portion 115 is a positioning hole, and positioning holes are formed in the first blade 111 and the second blade 112.
- the number of the positioning portions 115 is not limited. In this embodiment, the number of the positioning portions 115 is greater than Equal to two.
- the first blade 111 is formed with two diamond holes symmetrical about the rotation axis 100 ′
- the second blade 112 is formed with two circular holes symmetrical about the rotation axis 100 ′, the diamond hole and the bolt head
- the diamond-shaped protrusions are matched, the round hole is matched with the stud of the bolt, and the bolt is locked with the nut, 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.
- the positioning hole may be other shapes such as a square hole or a waist hole; the manner in which the positioning hole on the first blade 111 and the positioning hole on the second blade 112 and the connecting component 114 are not limited is limited here.
- the connection assembly 114 includes a mating portion 114 a that mates with the positioning portion 115.
- the positioning portion 115 is a positioning hole
- the engaging portion 114a is a bolt, and is a screw of the bolt, and cooperates with the positioning hole to form a shaft hole.
- the connecting assembly 114 further includes an axial fixing portion 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 portion is a bolt and a nut.
- 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 structures of the fitting portion 114a and the axial fixing portion are not limited to the above.
- the mating part of the connection component is disposed on a mounting member such as a fan or a flange, and forms a fixed connection with the mounting member such as a fan or a flange or is integrally formed.
- a driving portion is formed at the lower end of the fan, and the driving portion is configured to mount and position the blade assembly.
- the connection assembly further includes a pressing member for axially clamping the blade assembly, and the pressing member is connected to the blade assembly and is in surface contact with the blade assembly.
- the blade assembly may constitute a friction drive with the drive shaft or a mechanical positioning drive, such as a flat position.
- the positioning portion 115 generally has a geometric center.
- the distance from the geometric center to the rotation axis 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.
- 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.
- 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 '.
- a radial groove is opened in the driving shaft 14, and the groove can receive the positioning portion 115.
- the positioning portion 115 is provided outside the driving shaft 14, that is, the positioning radius r of the positioning portion 115 is greater than or equal to the radius of the driving shaft 14.
- the geometric center is uniquely determined.
- a point located at the center of the positioning part 115 can be roughly determined as the geometric center.
- 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.
- the rotation diameter D is 200 mm or more and 700 mm or less.
- the positioning hole may be another positioning hole with an incomplete positioning effect, such as an oval hole.
- the positioning hole can limit to a predetermined degree but cannot completely limit the rotation of the first blade 111 relative to the second blade 112. Therefore, the blade assembly 11 has a preset adjustment space when it encounters an obstacle, thereby increasing the service life of the blade assembly 11.
- the maximum value of the length of the line connecting any two points in the direction of the vertical diameter D1 of the first blade 111 in a plane perpendicular to the rotation axis 100 ′ 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 perpendicular to the direction of 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 5 or more and 13 or less.
- the rotation diameter D1 of the first blade 111 is approximately 511 mm
- the width W1 of the first blade 111 is approximately 51 mm
- 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.
- At least one reinforcing rib 116 is formed on the surface of the first blade 111 and the second blade 112, respectively.
- 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 project upward and extend along the length direction of the first cutting portion 111a.
- the rotation axis 100 ' is symmetrical; the two ribs 116 on the surface of the second blade 112 project 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 long.
- the ratio of the rotation 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 rotation 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.
- 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 5 or less; the ratio of the width W2 of the second blade 112 to the width b1 of the single rib 116 is 2 or more and 5 or less.
- the length a1 of the rib 116 refers to the maximum size 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 reinforcement.
- the largest dimension of the projection of the rib 116 in a plane perpendicular to the rotation axis 100 ′ is perpendicular to the extending direction of the reinforcing rib 116.
- the reinforcing rib 116 is distributed at a middle position between the first blade 111 and the second blade 112 To increase the strength of the first blade 111 or the second blade 112.
- the number, position, and specific shape of the reinforcing ribs 116 are not limited thereto.
- the first blade 111 extends substantially along a first straight direction; the second blade 112 extends substantially along a first curved direction. Since the first blade 111 is disposed 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.
- the first blade 111 extends substantially along the second curve direction; the second blade 112 extends substantially 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 partially different 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 a plane perpendicular to the rotation axis 100 ′ is 10 mm or more and 600 mm or less; the length of the projection of the second cutting portion 112a in a plane perpendicular to the rotation axis 100 ′ is 10 mm or more and 600mm or less.
- the length of the projection of the first cutting portion 111 a in a plane perpendicular to the rotation axis 100 ′ refers to the projection of the edge 111 b of the first cutting portion 111 a in a plane perpendicular to the rotation axis 100 ′. length.
- the length of the projection of the first cutting portion 111a in a plane perpendicular to the rotation axis 100 ' is such that the edges 111b of the plurality of first cutting portions 111a are perpendicular to the rotation
- the projection length of the first cutting portion 111a in a plane perpendicular to the rotation axis 100 'and the projection length of the second cutting portion 112a in a plane perpendicular to the rotation axis 100' are both greater than or equal to 10 mm and less than or equal to 600 mm. In the embodiment, the projection length of the first cutting portion 111a in a plane perpendicular to the rotation axis 100 'and the projection length 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 400 mm.
- a projection length of the first cutting portion 111 a in a plane perpendicular to the rotation axis 100 ′ is about 236 mm. 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 the same.
- the mass of the blade assembly 11 is 0.35 kg or more and 1.8 kg or less. When the mass of the blade assembly 11 is within the value range, the load of the lawnmower 100 is small and the working efficiency is high.
- the ratio of the mass of the first blade 111 to the mass of the second blade 112 is 0.5 or more and Less than or equal to 1; in an embodiment, when the first blade 111 and the second blade 112 are separately formed 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 equal to that of the first blade
- the mass ratio of 111 is 0.5 or more and 1 or less.
- the battery pack includes a battery pack case and a battery cell unit.
- the battery cell unit is disposed in the battery pack case.
- the number of battery 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 value of the length of the line connecting 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 millimeter .
- the product of the rotation diameter D (mm) of the blade assembly 11, the number N of the battery cell units, and the mass M (g) of the blade assembly 11 is greater than or equal to 3.5 ⁇ 105 (mm ⁇ g) and less than or equal to 7.3 ⁇ 107 (mm ⁇ g); In an embodiment, the product of the rotation diameter D (mm) of the blade assembly 11, the number N of the battery cell units, and the mass M (g) of the blade assembly 11 is greater than or equal to 7 ⁇ 105 (mm ⁇ g) And less than or equal to 3.6 ⁇ 107 (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 It is 1.4 ⁇ 106 (mm ⁇ g) and 1.8 ⁇ 107 (mm ⁇ g) or less.
- the lawnmower 100 When the product of the rotation diameter D (mm) of the blade assembly 11, the number N of the battery cell units, and the mass M (g) of the blade assembly 11 satisfies the above-mentioned numerical range, the lawnmower 100 has a smaller load or higher Cutting efficiency.
- 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.
- the number N of the battery cell units herein refers to the total number of battery cells included in all battery packs.
- the rotation diameter D of the blade assembly 11 is about It is equal to 508 millimeters, and the number N of battery cells included in the battery pack is equal to ten.
- the number N of battery cells refers to the number of battery cells included in a battery pack that provides a power source for the motor 13 driving the blade assembly 11.
- the lawnmower 100 When the lawnmower 100 is a self-propelled lawnmower, it usually further includes a self-propelled motor that drives the wheels to rotate. At this time, the motor 13 should not include a self-propelled motor.
- the battery pack here does not include a battery pack for powering a self-propelled motor.
- a 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 lateral dimension of the blade assembly 11.
- the battery pack contains the number N of the battery cell units, and the mass of the blade assembly 11 is M (g).
- the product of the lateral dimension (mm) of the blade assembly 11, the number N of battery cells, and the mass M (g) of the blade assembly 11 is greater than or equal to 3.5 ⁇ 105 (mmg) and less than or equal to 7.3 ⁇ 107 (mmg) ); In one embodiment, the product of the lateral dimension (mm) of the blade assembly 11, the number N of the battery cell units, and the mass M (g) of the blade assembly 11 is greater than or equal to 7 ⁇ 105 (mm ⁇ g) and less than Is equal to 3.6 ⁇ 107 (mm ⁇ g); in one embodiment, the product of the lateral dimension (mm) of the blade assembly 11, the number N of the battery cell units, and the mass M (g) of the blade assembly 11 is 1.4 ⁇ 106 ( mm ⁇ g) and less than or equal to 1.8 ⁇ 107 (mm ⁇ g).
- the output torque of the motor 13 is greater than or equal to 0 and less than or equal to 10 N ⁇ m; in an embodiment, the output torque of the motor 13 is greater than or equal to 3 N ⁇ m and less than or equal to 8 N ⁇ m; in this embodiment, the output torque of the motor 13 is approximately 4N ⁇ m.
- the lawnmower 100 has higher cutting efficiency or cutting ability.
- 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 20,000 kg ⁇ mm 2 .
- the lawnmower 100 not only needs to cut vegetation, but also needs to break the vegetation, or collect the cut vegetation into a collection device.
- the machine 100 also has a higher grass-breaking ability or a grass-removing ability.
- the lawnmower 100 is further provided with a collecting device (not shown) for collecting the cut vegetation.
- the collecting device is connected to the chassis 12.
- the chassis 12 is formed with a grass outlet, and the collection device is connected to the grass outlet. Cut vegetation enters the collection device from the chassis 12.
- the average wind speed of the straw outlet is 3 m / s or more and 25 m / s or less.
- the average wind speed at the grass outlet is 5 m / s or more and 15 m / s or less, and the average wind speed output from the grass outlet meets When the value is in the above range, it is beneficial to improve the grass-crushing ability and grass-removing ability of the lawnmower 100.
- the linear speed of the tip 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 is rotated about the rotation axis 100'.
- FIG. 11 is a schematic diagram of the blade assembly 21 of the lawnmower provided to the driving shaft 24 according to the second embodiment of the present application.
- the blade assembly 21 in this embodiment does not include a connection assembly, and the blade assembly 21 is formed with a positioning portion 213 and a fitting provided to define a phase angle range of the first blade 211 and the second blade 212. Section 214.
- the remaining structure of the lawnmower 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 mating portion 214 provided to cooperate with the positioning portion 213; when the positioning portion 213 and the mating portion 214 are mated with each other, the second The blade 212 is fixed relative to the first blade 211 in a circumferential direction around the rotation axis 211 ′ or can be rotated within a preset angle range. That is to say, the position of the second blade 212 with respect to the first blade 211 in the circumferential direction with respect to the first blade 211 in the circumferential direction is limited only by the positioning portion 213 and the mating portion 214 without a connection component.
- the first blade 211 and the second blade 212 are respectively provided with a fitting portion 214 and a positioning portion 213, and the positioning portion 213 is a convex portion provided on the second blade 212 and protruding from the upper surface of the second blade 212.
- the mating portion 214 is a through hole provided in the first blade 211.
- the positioning portion 213 may be a regular three-dimensional structure such as a cylinder or other irregular shapes; the matching portion 214 may be a through hole with a circular cross section, or other through holes that can be matched with the positioning portion 213.
- the specific structures of the positioning portion 213 and the mating portion 214 are not limited to the above-mentioned protrusions and through holes.
- the positioning portion 213 is a protrusion protruding from the second blade 212, and the mating portion 214 is formed on the first portion.
- An accommodating portion protruding upward on the surface of the blade 211, the accommodating portion can accommodate at least a portion of the positioning portion 213 or cooperate with the positioning portion 213, so as to achieve positioning of the first blade 211 relative to the second blade 212.
- the number of the positioning portions 213 and the mating portions 214 is not limited. In one embodiment, the positioning portions 213 and the mating portions 214 are an even number and are disposed symmetrically with respect to the rotation axis 211 ', respectively, so that the first blade 211 and the second blade 212 The applied force is more uniform, so that the position of the first blade 211 relative to the second blade 212 is more stable.
- the positioning portion 213 in this embodiment generally has a geometric center.
- the distance from the geometric center to the rotation axis 211 ' is a 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 50 mm.
- 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.
- the positioning radius r' of the positioning portion 213 is approximately 30 mm.
- a radial groove is formed on the driving shaft 24 to receive the positioning portion 213.
- the positioning portion 213 is provided 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.
- the geometric center is uniquely determined.
- a point located at the center of the positioning portion 213 can be roughly determined as the geometric center.
- the maximum length of 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 200 mm or more and 700 mm or less. In one embodiment, the rotation diameter is 250 mm or more and 560 mm or less.
- 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.
- the mating portion 214 also 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 one embodiment, The positioning radius of the mating portion 214 is greater than or equal to the radius of the drive shaft 24 and less than or equal to 50 mm.
- FIG. 12 is a schematic diagram of a blade assembly and a connection assembly of a lawn mower provided in Embodiment 3 of the present application.
- the difference from the first and second embodiments lies in the structure of the connection assembly and the connection manner between the connection assembly and the blade assembly. Other similarities can be applied to this embodiment.
- the lawnmower includes a connection assembly 312.
- the connection assembly 312 is formed with a first connection portion 312a connected to the first blade 311 and a second connection portion 312b connected to the second blade 313.
- the second blade 313 is opposed to the first blade 311 around the rotation axis. 311 'is fixed in the circumferential direction or can be rotated within a preset angle range.
- the first blade 311 and the second blade 313 are fixed in the circumferential direction around the rotation axis 311 ′ or can be rotated within a preset angle range through the connection component 312.
- the first blade 311 and the second blade 313 themselves Does not constitute a connection.
- the connection component 312 is a flange, but is not limited to a flange.
- the connecting component 312 forms a fixed connection with the first blade 311 and the second blade 313 in the up-down direction, so that the first blade 311 and the second blade 313 form a fixed phase angle.
- connection of the connecting component 312 with the first blade 311 and the second blade 313 may also be movable, so that the second blade 313 can be within a preset angle range with respect to the first blade 311 in the circumferential direction around the rotation axis 311 '. Turn.
- FIG. 13 to FIG. 16 are schematic diagrams of a blade assembly 41 of a lawn mower provided in Embodiment 4 of the present application. Similarly, the blade assembly 41 rotates around the rotation axis 411 ′.
- the difference between the blade assembly 41 in this embodiment and the lawn mower in the first embodiment is only that the structure of the second blade 412 of the blade assembly 41 is different. The same points as those in the first embodiment can be applied in this embodiment.
- the second cutting portion 412a is located below the first cutting portion 411a in a direction parallel to the rotation axis 411 '; the first cutting portion 411a is provided on the second cutting portion 412a in a circumferential direction around the rotation axis 411'.
- the front side of the second cutting portion 412a is disposed on the front edge of the second blade 412.
- 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 is rotated in the first direction A' with the rotation axis 411 'as an axis, and also That is to say, the first cutting portion 411a contacts the vegetation before the second cutting portion 412a, and the second cutting portion 412a is disposed on the edge of the second blade 412 that first contacts the vegetation.
- two first cutting portions 411a are respectively disposed on the front sides of the two ends of the first blade 411, and the two first cutting portions 411a are center symmetrical with respect to the rotation axis 411 '; the two second cutting portions 412a are provided separately On the front sides of the two ends of the second blade 412, the two second cutting portions 412a are center symmetrical with respect to the rotation axis 411 ', and the blade assembly 41 as a whole is center symmetrical with respect to the rotation axis 411'.
- the second side of the second blade 412 is further formed with a first guide portion 412b and a second guide portion 412c that guide the airflow upward, that is, the second blade 412 is in a circumferential direction with the second cutting portion 412a in the rotation axis 411 '.
- a first guide portion 412b and a second guide portion 412c are formed on opposite sides, and the first guide portion 412b and the second guide portion 412c are provided to guide the airflow upward.
- the first guide portion 412b and the second guide portion 412c refer to two entities that are at least partially separated.
- the first guide portion 412b and the second guide portion 412c are integrally formed with the second blade 412.
- the first guide portion 412 b and the second guide portion 412 c extend substantially along a length direction perpendicular to the second blade 412 and are sequentially arranged along the length direction of the second blade 412.
- the first guide portion 412 b and the second guide portion 412 c may be separately formed from the second blade 412 and fixedly connected to the second blade 412.
- Each second cutting portion 412a corresponds to a first guide portion 412b and a second guide portion 412c, and the first guide portion 412b and the second guide portion 412c are disposed on the rear side of the same end of the second cutting portion 412a.
- the second blade 412 is provided with two second cutting portions 412a, two first guide portions 412b and two second guide portions 412c are formed, two first guide portions 412b and two second guide portions 412c are formed. Each is symmetrical about the rotation axis 411 '.
- the first guide portion 412b is bent upward along a first curved surface
- the second guide portion 412c is bent upward along a second curved surface different from the first curved surface.
- at least part of the first guide portion 412b and at least part of the second guide portion 412c have different curvatures.
- the first guide portion 412b and the second guide portion 412c may have a fixed curvature, respectively, or the curvature of the first guide portion 412b and the second guide portion 412c may be changed according to a preset rule or may be changed irregularly, which is not limited herein.
- the first guide portion 412b and the second guide portion 412c have varying curvatures, respectively.
- the radius of curvature at 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 Has a radius of curvature of 0 mm or more and 60 mm or less.
- 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 a plurality of guide portions such as a fourth guide portion, and the plurality of guide portions are along the second blade. The extending directions of 412 are arranged in order.
- the first guide portion 412b and the second guide portion 412c are both flanges that are turned upward from the end of the second blade 412.
- the portion where the first guide portion 412b starts to rise is the first root portion 412d and the second guide portion 412c.
- the part starting to turn upward is the second root portion 412e, the first root portion 412d and the second root portion 412e are located substantially on the same straight line, and the straight line intersects with the extension line of the edge of the second cutting portion 412a obliquely, the straight line and the second
- the intersection angle ⁇ formed by the extension line of the cutting edge of the cutting portion 412a is 0 or more and 40 degrees or less.
- intersection angle formed by the straight line and the extension line of the cutting edge of the second cutting portion 412a is 0 or more 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 outside of the first guide portion 412b and the outside of the second guide portion 412c extend substantially along the same straight line, and the straight line intersects with an extension line of the second cutting portion 412a obliquely.
- the outside of the first guide portion 412b refers to an edge opposite to the first root portion 412d
- the outside of the second guide portion 412c refers to an edge opposite to the second root portion 412e.
- the extending direction of the outside of the first guide portion 412b and the outside of the second guide portion 412c is substantially parallel to the straight line where the first root portion 412d and the second root portion 412e are located.
- a cutting portion opening is also formed on the outer side of the first guiding portion 412b and the outer side of the second guiding portion 412c.
- the cutting portion opening can further cut vegetation and improve the grass-crushing ability of the lawnmower.
- 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 preset cutting capabilities.
- FIG. 17 is a schematic diagram of a part of a structure of a lawnmower provided in Embodiment 5 of the present application.
- the difference between this embodiment and Embodiment 1 lies in the structure of the blade assembly 51 and the mounting assembly 56, which are the same as those in Embodiment 1. It can be applied to this embodiment.
- the motor-driven blade assembly 51 rotates around a rotation axis 511 ′; the blade assembly 51 includes a first cutting portion 511 a and a second cutting portion 512 a configured to cut vegetation; In the direction of the rotation axis 511 ', the second cutting portion 512a is located below the first cutting portion 511a.
- the blade assembly 51 includes a first blade 511 and a second blade 512, and the first cutting portion 511a is disposed at the first On a blade 511, the second cutting portion 512a is disposed on the second blade 512, and the first blade 511 is mounted above the second blade 512 in the direction of the rotation axis 511 '.
- the mounting assembly 56 includes a driving member 561.
- the driving member 561 is configured to drive the blade assembly 51 to rotate around the rotation axis 511 '.
- the blade assembly 51 is detachably connected to the driving member 561.
- the driving member 561 is connected to the driving shaft 54 and rotates in synchronization with the driving shaft 54.
- the driving member 561 and the driving shaft 54 form a fixed connection along the circumferential direction of the rotation axis 511 ', such as a flat connection or a screw connection.
- the mounting assembly 56 further includes a driving part 561a.
- the driving part 561a is fixedly connected to 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 driving portion 561a is connected to the first blade 511 and the second blade 512, respectively, and the first blade 511 and the second blade 512 are driven to rotate synchronously with the driving portion 561a.
- the position where the driving portion 561a is provided and the number of the driving portions 561a are not limited.
- the number of the driving portions 561a is two.
- the two driving portions 561a are respectively disposed 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'.
- the two driving portions 561a are connected to 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 portions 561a; one of which drives
- the portion 561a is substantially cylindrical and forms a rotational connection with the first blade 511 and the second blade 512; the other driving portion 561a forms a flat connection with the first blade 511 and the second blade 512.
- only one driving portion 561a may be provided and the driving portion 561a and the blade assembly 51 are connected in a flat position; or two cylindrical driving portions 561a are provided to be connected to the blade assembly 51.
- the mounting assembly 56 further includes a compression assembly 562 and a fastening assembly 563; the compression assembly 562 is configured to clamp the blade assembly 51 along the direction of the rotation axis 511 ', and the blade assembly 51 is disposed on the drive in a direction parallel to the rotation axis 511' Between the piece 561 and the pressing component 562; the fastening component 563 is provided to fix the position of the blade component 51 relative to the driving component 561 in a direction parallel to the rotation axis 511 ′, and the fastening component 563 is detachably connected to the driving shaft 54.
- the pressing component 562 is one or more metal washers and is at least partially in contact with the blade component 51.
- the fastening component 563 may be a nut, a screw, or a bolt, etc.
- the fastening component 563 is connected to the driving shaft 54 and resists. To the compression assembly 562.
- the driving shaft 54 passes through the blade component 51 and the pressing component 562, and the fastening component 563 and the driving shaft 54 form a threaded connection.
- the fastening component 563 may pass through at least one of the blade component 51 and the pressing component 562.
- the fastening component 563 and the driving shaft 54 form a fixed and can be Disassembled connection.
- the mounting assembly 56 further includes an insulation member 564 provided to achieve insulation between the blade assembly 51 and the drive shaft 54; the insulation member 564 is made of an insulating material; and the insulation member 564 is provided on the compression assembly along the direction of the rotation axis 511 '. Between 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. In the direction of the rotation axis 511 ', a groove 564a is formed at the bottom of the insulating member 564, and the pressing component 562 is inserted into the groove 564a. The drive shaft 54 or the fastening assembly 563 passes through the insulator 564.
- the lawnmower does not include a connection assembly that connects the first blade 511 and the second blade 512 as a whole before installation. That is to say, the first blade 511 and the second blade 512 are two independently formed and independently installed blades, which are respectively mounted to the driving shaft 54 and are constituted by a mounting assembly 56.
- the blade assembly 51 is connected by the driving portion 561a so that the phase angle between the first blade 511 and the second blade 512 is substantially unchanged.
- FIG. 20 is a schematic diagram showing a part of the structure of the lawnmower provided in the sixth embodiment of the present application.
- the difference between this embodiment and the fifth embodiment lies in the structure of the mounting assembly 66, which can be applied to the same points as the fifth embodiment. To this embodiment.
- the mounting assembly 66 in this embodiment is different from the mounting assembly 56 in the fifth embodiment in the structure of the insulating member 664.
- two grooves namely 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 provided in the upper concave.
- 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 direction of the rotation axis 611 '.
- the driving member 661 is provided with a driving portion 661a (refer to FIG. 20).
- the design of the insulating member 664 can not only better achieve the insulation between the blade assembly 61 and the driving shaft, but also help the blade assembly 61 maintain a fixed phase angle to prevent slipping; at the same time, it is also beneficial to the driving member The 661 drives the blade assembly 61 more efficiently.
- FIG. 23 is a schematic diagram showing a part of a structure of a lawnmower provided in Embodiment 7 of the present application.
- the difference between this embodiment and Embodiment 6 lies in the structure of the mounting assembly 76, which may be the same as Embodiment 6. Apply to this embodiment.
- the mounting assembly 76 in this embodiment is different from the mounting assembly 66 in the sixth embodiment in the structures of the driving member 761 and the insulating member 764.
- the driving member 761 drives the blade assembly 71 through the action of friction.
- the driving member 761 and the blade assembly 71 form at least partial contact by a pressing component and a fastening component.
- the driving member 761 and the blade assembly 71 are in surface contact and are pressed against each other and formed between the driving member 761 and the blade assembly 71.
- the driving 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 effect of the frictional force in the circumferential direction along the rotation axis 701. That is to say, the driving member 761 does not need to be provided with a driving part that drives the blade assembly 71, and the blade assembly 71 does not need to be provided with a positioning hole that cooperates with the driving part.
- the driving member 761 drives the first blade 711 by friction, and the first blade 711 drives the second blade 712 by driving the insulating member 764.
- An insulating member 764 is provided 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 provided in the upper groove 764a, and the second blade 712 is provided.
- the lower groove 764b is, 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.
- 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 and the first blade 711 and the second blade 712 form a predetermined range of phase angles.
- 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.
- FIG. 26 is a schematic diagram showing a part of a structure of a lawn mower provided in Embodiment 8 of the present application.
- the difference between this embodiment and the fifth embodiment lies in the structure of the blade assembly 81 and the mounting assembly 86, which are the same as those of the fifth embodiment. Any place 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 the first blades 811 is two and one is provided on each of the first blades 811.
- the first cutting portion 811a and the second blade 812 are provided with a second cutting portion 812a. In the direction of the rotation axis 801, the first blade 811 is located above the second blade 812.
- Two first blades 811 are respectively located on both sides of the rotation axis 801 and are fixedly connected to the second blade 812.
- the first blade 811 is detachably connected to the second blade 812.
- the first blade 811 is an integral blade
- the second blade 812 is a plurality of split blades and is fixedly connected to the first blade 811, respectively
- the first cutting portion 811a and the second cutting portion 812a are respectively disposed at the first One blade 811 and a second blade 812.
- 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. That is to say, the blade assembly 81 is a one-piece 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.
- 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
- the driving part 861 drives the blade assembly 81 to rotate through the driving part.
- the driving portion is connected to the first blade 811.
- the shape and number of the driving portions are not limited. In an embodiment, there is no need to provide a driving part on the driving member 861, the driving member 861 is closely attached to the blade assembly 81, and the blade assembly 81 is driven to rotate by the rotation axis 801 by friction.
- FIG. 27 is a schematic diagram of the lawnmower 100 connected to the grass pressing assembly 20 provided in the ninth embodiment.
- the lawnmower 100 in this embodiment is the same as the lawnmower in the first embodiment, except that only the difference is that The lawn mower 100 in this embodiment is further 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 a cutting function of the lawnmower 100;
- the chassis 12 is formed with an accommodation space that accommodates at least a portion of the blade assembly 11.
- the blade assemblies 11 are all located inside the accommodation space.
- the lawnmower 100 has a traveling direction 101 'when traveling in a straight line on the ground.
- 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 lawnmower 100 in the present application may be a push-type lawnmower or a riding lawnmower.
- the front-back and up-down directions as shown in FIG. 27 are set.
- the grass pressing assembly 20 is connected to the lawn mower 100.
- the grass pressing assembly 20 is detachably connected to the rear end of the lawn mower 100.
- the grass pressing assembly 20 is configured to compact the lawn, and the grass pressing assembly 20 is used as an accessory for users to selectively assemble according to specific needs.
- the lawnmower 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 around the mounting shaft 17.
- the mounting shaft 17 here is a shaft body of the lawn mower 100 itself, and may be a wheel shaft for mounting a wheel, or other shaft bodies.
- the grass pressing assembly 20 is detachably connected to the installation shaft 17, and there is no need to add another installation structure to the grass cutter 100 to install the grass pressing assembly 20, so it has the advantage of convenient installation.
- the grass pressing assembly 20 in this embodiment can be installed on the lawnmower 100, which has the advantage of strong adaptability.
- the grass pressing assembly 20 includes a drum 201, a connection portion 202, and a support portion 203.
- the roller 201 has a preset weight so that the roller 201 always applies pressure to the ground, and the pressure is large enough to make the lawn compacted. That is to say, the grass pressing assembly 20 in this embodiment applies pressure to the lawn mainly by the weight of the drum 201.
- the connecting portion 202 and the mounting shaft 17 form a rotational connection, that is, the connecting portion 202 can rotate around the mounting shaft 17.
- the connecting portion 202 is substantially a hook shape having an opening in the circumferential direction. After the connecting portion 202 is hung on the mounting shaft 17, the connecting portion 202 is closed in the circumferential direction by fasteners such as screws or bolts, so that the mounting shaft 17 cannot be removed from The connection portion 202 is detached in the radial direction.
- the supporting portion 203 connects the drum 201 and the connecting portion 202.
- the support portion 203 and the connection portion 201 may be integrally formed or separately formed.
- the support portion 203 includes a first support arm 2031 and a second support arm 2032.
- the drum 201 has a length direction.
- the first support arm 2031 and the second support arm 2032 extend at least partially in a direction perpendicular to the length of the drum 201.
- the length direction of the drum 201 is parallel to the axis 171 of the mounting shaft 17.
- the first support arm 2031 connects the first end of the drum 201 and the connection portion 202
- the second support arm 2032 connects the second end of the drum 201 and the connection portion 202
- the support portion 203 further includes a third support arm 2033.
- the third support arm 2033 is fixedly connected to the first support arm 2031 and the second support arm 2032 to enhance the overall strength and rigidity of the support 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 roller 201 has a middle plane 21 'perpendicular to the length direction, and the roller 201 is symmetrical about the middle plane 21'; the supporting portion 203 has a symmetrical surface 22 ', the supporting portion 203 is symmetrical about the symmetrical surface 22', and the symmetrical surface 22 'is parallel Or coincide with the mid-plane 21 '.
- the connecting portion 202 is mounted to the middle position of the mounting shaft 17, the symmetry plane 22 'coincides with the center plane 21'.
- the connecting portion 202 may be installed at any position in the axial direction of the mounting shaft 17.
- the drum 201 includes a central axis 2011 and a tube portion 2012.
- the central axis 2011 extends along the length of the drum 201, and 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 support portion 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 support portion 203 form a fixed connection, and the barrel portion 2012 can rotate relative to the central shaft 2011. .
- the screw can be replaced with a bolt that is fixedly connected to the support portion 203 so that the central shaft 2011 can rotate around the bolt; or that the screw and the central shaft 2011 form a rotational connection, and the central shaft 2011 can rotate relative to the screw.
- the lawn mower 100 includes an adjusting component (not shown) for adjusting the height of the chassis 12 from the ground, and the grass pressing component 20 is connected to a shaft on the adjusting component.
- the adjusting assembly in this embodiment is mainly composed of a link mechanism.
- the height of the adjustment component from the ground also changes. That is, the height of the mounting shaft 17 from the ground is variable.
- the mounting shaft 17 is parallel to the ground, and the distance d from the axis 171 of the mounting shaft 17 to the axis 2011a of the central axis 2011 of the drum 201 is sufficiently long so that the drum 201 still contacts the ground no matter what height the mounting shaft 17 is from the ground. And supported by the ground. That is, 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.
- FIG. 31 is a schematic diagram of a grass pressing assembly 20 ′ provided in Embodiment 10 of the present application. Compared with Embodiment 9, the only difference lies in the structure of the support portion 203 ′, and only the support portion 203 ′ is described below. .
- the support portion 203 ' includes a first support arm 2031', a second support arm 2032 ', and a third support 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 two of the second support arm 2032' The ends are connected to the third support arm 2033 'and the connecting portion 202', respectively.
- the connection between the first support arm 2031 'and the second support arm 2032' is a fixed connection, including a welding connection or a screw connection.
- FIG. 32 is a schematic diagram of a lawn mower 50 provided in Embodiment 11 of the present application. Compared with Embodiment 1, the difference lies mainly in the structure and location of the lighting assembly. The following mainly introduces the lighting assembly 508. related information.
- the lawn mower 50 includes a main body 501 and an operating device 502.
- the main body 501 includes a main body housing 5011, a prime mover, and a working component 5013.
- the working component 5013 includes a tool function for executing a garden tool.
- the working element is a cutting element configured to cut grass and is a blade assembly 5013a.
- the host housing 5011 is provided as a working element to which a prime mover and an output power are mounted.
- 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 moving of the working element.
- the prime mover is a motor 5012 capable of driving the blade assembly 5013a to rotate.
- the operation device 502 is configured for a user to operate to control the host 501.
- the operation device 502 includes an operation element for a user to operate, and the operation element is a trigger 5021.
- the lawn mower 50 further includes a link assembly that connects the host 501 and the operating device 502.
- the lawnmower 50 further includes a pair of traveling wheels 5014.
- the traveling wheels 5014 drive the lawnmower 50 to walk on the ground.
- the two traveling wheels 5014 are symmetrically disposed on both sides of the first plane 501 '.
- the link assembly includes a pair of links 5031, and the link 5031 connects the host 501 and the operating device 502.
- the two links 5031 are symmetrically disposed on both sides of the first plane 501 '.
- an area located at one end of the link assembly 503 where the operation device 502 is provided is defined as an operation area 505
- an area located at one end of the link assembly 503 where the host 501 is provided is a work area 503
- the operation device 502 is located in the operation area In 505
- the host 501 is located in the work area 503.
- the connecting rod assembly further includes a handrail 5032 for the user to stand and hold in the operating position to push the lawnmower 50.
- the armrest 5032 is connected to two links 5031 and is located at an end of the link 5031 away from the host 501.
- a signal acquisition system 5023 is further provided in the operation area 505.
- the signal acquisition system 5023 is connected to the operation device 502 to receive input information from the operation device 502.
- a signal output system 5015 is also provided in the work area 503, and the signal output system 5015 is configured 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 links 5031.
- the operating table 5022 is located between the armrest 5032 and the host 501.
- the trigger 5021 and the operation platform 5022 form a rotational connection. The user can rotate the trigger 5021 to make the trigger 5021 fit to the armrest 5032, and the user's hand simultaneously holds the trigger 5021 and the armrest 5032.
- the signal acquisition system 5023 is disposed in a space surrounded by the operation table 5022.
- the signal output system 5015 is disposed in a space surrounded by the host casing 5011.
- the lawnmower 50 further includes a signal line component 504, which is connected to the signal output system 5015 and the signal acquisition system 5023 so that a communication connection is formed between the signal output system 5015 and the signal acquisition system 5023.
- the signal line component 504 passes the information to the signal output system 5015, and the signal output system 5015 controls the working component 5013 to perform the corresponding function in the corresponding state.
- the signal acquisition system 5023 includes a signal circuit board 5023a, and the signal output system 5015 includes a first output circuit board 5015a.
- the first output circuit board 5015a is connected to the motor 5012.
- the signal circuit board 5023a is provided 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 working elements, electronic switches, and circuit boards in the working area 503.
- the signal line assembly 504 includes a first signal line 5041, and the first signal line 5041 is connected to the first output circuit board 5015a and the signal circuit board 5023a, respectively, so as to implement communication between the first output circuit board 5015a and the signal circuit board 5023a.
- garden tools connect multiple electronic components through power lines and electronic switches.
- the power loss is large, the cable costs are high, and the wiring is complicated, resulting in chaos in the internal structure of the machine.
- the first signal line 5041 is used to connect the signal circuit board 5023a and the first output circuit board 5015a.
- a single signal line can realize the connection between multiple electronic components, thereby making the mowing of this embodiment
- the power loss of the machine 50 is small, the cable cost is low, and the wiring is simple, making the internal structure of the machine simple.
- the stability of the mower 50 is good, it is not easy to be damaged, and it is relatively easy to maintain.
- 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 multiple signal circuit boards 5023a are implemented by signal lines. Communication connection.
- the lawnmower 50 further includes a power source.
- the power source is a battery pack 5016.
- the battery pack 5016 is configured to power the motor 5012. Both the battery pack 5016 and the motor 5012 are 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 with a splitter 5042, and the splitter 5042 is connected to two output terminals 5042a, which are respectively connected to the first output circuit board 5015a and the second output circuit board 5015b (refer to FIG. 34) And FIG.
- the working component 5013 further includes other functional elements that realize additional functions of the lawnmower 50.
- the functional elements may be, for example, a lighting element 5081 or a self-propelled motor.
- the functional element is an illumination element 5081 as an example.
- the lawnmower 50 further 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 with a first access terminal 5015d, and the first access terminal 5015d is configured to receive a signal output by the first signal line 5041.
- the second output circuit board 5015b is further installed or connected with a second access terminal 5015e, and the second access terminal 5015e is configured to receive a signal output from 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.
- These two output terminals 5042a are provided with a USB female socket, and the first access terminal 5015d and the second access terminal 5015e are provided with a USB male socket.
- the USB socket is a TYPE-C socket, and the USB socket is a TYPE-C socket.
- the signal line assembly 504 has good versatility, is convenient to maintain, and can improve the stability performance of the lawnmower 50.
- the output terminal 5042a may be provided with a USB male socket
- the first access terminal 5015d and the second access terminal 5015e may be provided with a USB female socket.
- the signal output system 5051 of the lawnmower 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 provided to realize other functions of the lawnmower 505.
- the lawn mower 50 further includes a lighting component 508 and a status display component 509.
- the lighting assembly 508 includes a lighting switch 5082 and a lighting element 5081 in FIG. 32.
- the lighting element 5081 is disposed in the work area 503 to illuminate the area on the front side of the lawnmower 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 provided for a user to operate to control whether the lighting element 5081 is lit.
- the status display component 509 includes a status display light 5091.
- the status display light 5091 can display the working status of the lawnmower 50.
- the status display light 5091 can also display whether the lawnmower 50 is activated.
- the lighting switch 5082 and the status display lamp 5091 are both located in the operation area 505. In this way, when the user is standing at the rear side of the operation device 502, the user can conveniently operate the lighting switch 5082 so that the lighting element 5081 is turned on. Especially during the operation of the lawnmower 50, the user does not need to release the trigger 5021 to go to the side or front of the lawnmower 50 to activate the lighting element 5081. Therefore, the user can conveniently and conveniently operate the light switch 5082 during the operation of the lawnmower 50, thereby improving the convenience of operation. In addition, the user can easily observe the display status of the status display component 509, and there is no need for the user to specifically leave the operation position to observe the status display component 509.
- the lighting switch 5082 and the status display lamp 5091 are both disposed on the operation table 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 operation of the user.
- the middle part of the operating table 5022 is further provided with a safety switch 5024.
- the safety switch 5024 and the trigger 5021 constitute a switch group for starting the motor 5054.
- the lawn mower 50 is in a stopped state.
- the safety switch 5024 is triggered, the user starts the trigger 5021 and the motor 5054 starts; when the safety switch 5024 is not triggered, the user starts the trigger 5021 and cannot start the motor 5054.
- the lighting switch 5082 and the status display lamp 5091 are located on both sides of the safety switch 5024, respectively, so that the structural layout on the operation table 5022 is more reasonable, and it is more convenient for the user to operate the lawnmower 50.
- the lighting switch 5082 and the status display lamp 5091 are respectively disposed on both sides of the first plane 501 '. In this way, it is convenient for a 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.
- the light switch 5082 may be provided on or near the handrail 5032, as long as the user can operate the light switch 5082 without leaving the operation area 505 while standing behind the lawn mower 50.
- the armrest 5032 includes a cross bar 5032a, the cross bar 5032a is used for holding by the user, and the cross bar 5032a extends in a direction perpendicular to the link 5031.
- the minimum distance between the lighting switch 5082 and the cross bar 5032a is 0 cm or more and 30 cm or less. In this way, it can be ensured that when the user holds the cross bar 5032a, he can extend his arm to operate the light switch 5082.
- the light switch 5082 is a membrane switch, which occupies a small space and has low manufacturing cost.
- the lighting switch 5082 is also provided with an LED light. In this way, the user can conveniently observe whether the lighting switch 5082 is triggered in a relatively bright environment.
- the number of status display lights 5091 is five, and the five status display lights 5091 are: working status display light, working shape display light, temperature status display light, load status display light, and power status display light.
- the operating state display lamp indicates whether the lawnmower 50 has been started, so as to determine whether the lawnmower 50 has been damaged or not according to the display state of the operating state display lamp.
- the operation mode display lamp displays the folded state of the lawnmower 50 or the telescopic state of the link assembly 503 of the lawnmower 50.
- the temperature status display lamp indicates whether the temperature of the battery pack 5055 or the motor 5054 exceeds the corresponding preset temperature.
- the load status display lamp indicates whether the lawnmower 50 is in an overload state.
- the power status display lamp displays the remaining power of the battery pack 5055, or whether the remaining power of the battery pack 5055 is lower than a preset power.
- the chassis 60 is formed with a receiving space 60a covering the blade assembly 5013a.
- the blade assembly 5013a rotates around the rotation axis 504 ', thereby performing a cutting function.
- the lawn mower 50 has a lead-out mode and a grass crushing mode.
- the grass cuttings can be discharged out of the chassis 60.
- the lawnmower is in the weeding mode, the cuttings will fall below the chassis 60.
- the chassis 60 includes a vortex portion 601 and a lead-out portion 602.
- the vortex portion 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 channel 6011, and the vortex flows in the vortex channel 6011 along one flow path 60b.
- the flow path 60b also extends substantially in the circumferential direction around the rotation axis 504 '.
- the lead-out portion 602 is provided on the vortex flow path 60b.
- the lead-out portion 602 extends from the vortex portion 601 in the tangential direction of the vortex, and the lead-out portion 602 guides the vortex to flow out in the tangential direction of the flow path 60b. Therefore, when the lawnmower 50 is in the lead-out mode, the lead-out section 602 can guide the grass cuttings to first move along the circulation path 60b of the vortex channel 6011, and then when the grass cuttings move to the lead-out section 602, the lead-out section 602 guides a part of the grass cutting Leaving the chassis 60 in a tangential direction of the circulation path 60b, thereby discharging this part of grass to the outside of the lawnmower 50, or collecting this part of grass into a grass-collecting basket.
- the lawnmower 50 further includes a plug 6017.
- the plug 6017 When the plug 6017 is installed to the lead-out portion 602, the lead-out portion 602 is sealed, so that the lawnmower 50 is in the grass breaking mode.
- the plug 6017 When the plug 6017 is not installed to the lead-out portion 602, the lead-out portion 602 is opened, and the airflow can flow out of the lead-out portion 602, so that the lawnmower 50 is in the lead-out mode.
- the chassis 60 further includes a stop portion 603 configured to prevent the eddy current from passing through the outlet portion 602 and continuing to circulate in the vortex portion 601 when flowing through the outlet portion 602. , Thereby increasing the flow rate of the vortex flowing from the lead-out portion 602. At least a portion of the lead-out portion 602 and at least a portion 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 stop of the eddy current by the stopper 603 can increase the flow rate of the eddy current from the lead-out section 602 when the lawnmower 500 is in the lead-out mode, thereby improving the grass collection efficiency of the cuttings.
- the grass cuttings can also be stopped so that a part of the grass cuttings falls into the cutting area of the blade assembly 5013a again, and is cut by the blade assembly 5013a again, thereby improving the grass breaking ability.
- the chassis 60 further includes a mounting portion 604 configured to mount the motor 5054.
- the mounting portion 604 is formed with a hole 6041 around the rotation axis 504 'to allow the motor shaft to pass through.
- 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 provided around the inner ring 6012.
- the bottom surface 6014 connects the inner ring 6012 and the outer ring 6013.
- a vortex channel 6011 of a vortex portion 601 is formed between the inner ring 6012 and the outer ring 6013.
- the derivation unit 602 includes a first derivation surface 6021, a second derivation surface 6022, and a derivation bottom surface 6023.
- the first lead-out surface 6021 is connected to the inner ring 6012
- the second lead-out surface 6022 is connected to the outer ring 6013.
- the first lead-out surface 6021 extends from the inner ring 6012 along a tangential direction of the inner ring 6012
- the second lead-out surface 6022 extends from the outer ring 6013 along a tangential direction of the outer ring 6013.
- the lead-out bottom surface 6023 is connected to the first lead-out surface 6021 and the second lead-out surface 6022, and the lead-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 so as to block the airflow flowing in the vortex portion 601 so that the airflow flows out from the lead-out portion 602.
- the lead-out portion 602 is located substantially on the first side of the first plane 501 '. In this embodiment, if more than 90% of the lead-out portions 602 are located on the first side of the first plane 501 ', it can be considered that the lead-out portions 602 are located substantially 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'.
- the stop surface 6031 and a part of the lead-out portion 602 are located on the same side of the first plane 501 '.
- 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 stopper portion 603 is provided at an edge of the lead-out portion 602.
- 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 the side of the stop surface 6031 away from the bottom surface 6014 along a plane that obliquely intersects the stop surface 6031.
- the connection surface 6032 connects the stop surface 6031 and the bottom surface 6014.
- the stopper portion 603 is integrally formed with the vortex portion 601, and the vortex portion 601 is recessed toward the ground to form the stopper portion 603.
- the stopper portion 603 is located inside the vortex portion 601.
- the stopper portion 603 is also located in the vortex channel 6011 formed by the vortex portion 601.
- the stopper portion 603 is also located on the vortex flow path 60b.
- the stop portion 603 and the lead-out portion 602 are also disposed on the same side of the second plane 502 'passing through the rotation axis 504' and perpendicular to the first plane 501 '. That is, the stopper portion 603 and the lead-out portion 602 are provided at the rear portion of the chassis 60.
- At least a part of the stopper portion 603 is also located between the lead-out portion 602 and the hole 6041.
- the ratio of the length L1 of the stopper 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 the size of the stopper portion 603 can be prevented from being excessively large.
- an effective eddy current cannot be generated in the vortex portion 601, and on the other hand, the stopper portion 603 can be prevented from affecting the discharge efficiency of the lead-out portion 602 and the grass-crushing ability of the lawnmower 50 due to the small size.
- FIG. 42 is a lawn mower 10 provided in the thirteenth embodiment of the present application. Compared with the first embodiment, the main difference lies in the structure of the blade assembly 101.
- the lawn mower 10 includes a blade assembly 101 for cutting vegetation and a chassis 102 accommodating the blade assembly 101.
- the blade assembly 101 is located inside the chassis 102.
- the lawnmower 10 further includes a motor 103 for driving the blade assembly 101 to rotate.
- the motor 103 is located above the chassis 102.
- the motor 103 and the blade assembly 101 constitute coaxial rotation with the rotation axis 10 'as an axis.
- the motor 103 includes a motor shaft, and the blade assembly 101 includes a driving shaft 1011 (refer to FIG. 44) that drives the rotation of the blade assembly 101.
- the driving shaft 1011 may be a motor shaft.
- the motor 103 and the blade assembly 101 may be disposed between A transmission mechanism is used for transmission, so that the motor 103 shaft and the drive shaft 1011 constitute non-coaxial rotation.
- 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, and the first blade 1012 and the second blade 1013 are each rotated by an axis. 10 'for shaft rotation.
- the first blade 1012 and the second blade 1013 constitute synchronous rotation.
- the first blade 1012 and the second blade 1013 rotate synchronously in the rotation direction 10a 'with the drive shaft 1011 as an axis.
- the blade assembly 101 further includes a connection assembly 1014.
- the first blade 1012 and the second blade 1013 form a fixed connection through the connection assembly 1014.
- first blade 1012 and the second blade 1013 form a detachable connection through the connection assembly 1014. It is convenient to repair or replace the blade assembly 101 at a later stage.
- the connection assembly 1014 includes a connection member and a nut.
- the connection assembly 1014 also uses other connection 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 caps.
- the first blade 1012 is located in front of the second blade 1013. That is, when the motor 103 is started, although the first blade 1012 and the second blade 1013 rotate synchronously, the first blade 1012 is faster than the second blade. 1013 first cut to vegetation.
- the rotation direction 10a ' is a clockwise direction with the drive shaft 1011 as an 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.
- the first mounting portion 1012a is configured to realize the first blade 1012 and the second blade 1013 and a driving shaft.
- the first cutting part 1012b is symmetrically disposed on both ends of the first blade 1012 with respect to the driving shaft 1011, and the first cutting part 1012b is configured to realize cutting of vegetation.
- the second blade 1013 includes a second mounting portion 1013a located at the middle portion and second cutting portions 1013b symmetrically provided at both ends.
- the middle and two ends of the first blade 1012 are located substantially on the same plane, that is, the first mounting portion 1012a and the first cutting portion 1012b are located on the same plane, and the entire first blade 1012 is basically deployed along a plane
- the middle and two ends of the second blade 1013 are located on different planes, and 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 at the second installation relative to the ground Below the portion 1013a, the entire second blade 1013 is developed along a curved surface.
- first mounting portion 1012a and the second mounting portion 1013a overlap each other and obliquely intersect, and the first mounting portion 1012a and the second mounting portion 1013a form a fixed connection through a connecting member 1014a (refer to FIGS. 45 and 46).
- Pins 1014a are provided with pins of different shapes, and the first mounting portion 1012a and the second mounting portion 1013a are respectively provided with holes that cooperate with the pins, so as to form a fixed connection with the connecting member 1014a.
- the first mounting portion 1012a and the second mounting portion 1013a are provided with circular holes and irregularly shaped limiting holes.
- 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 at a leading edge of the first cutting portion 1012b.
- the leading edge refers to the first blade 1012 along the rotation direction.
- the first cutting portion 1012b first cuts to the edge of the vegetation.
- a front edge of the first cutting portion 1012b at both ends of the first blade 1012 is provided with a first cutting edge 1012c symmetrically with respect to the drive shaft 1011.
- a front edge of the second cutting portion 1013b at both ends of the second blade 1013 is also provided with a second cutting edge 1013c symmetrically.
- the first cutting edge 1012c and the second cutting edge 1013c respectively include a hardened portion for cutting vegetation.
- the hardened portion has a higher hardness than other parts because of the hardening process.
- the first cutting edge 1012c and the second cutting edge 1013c are all hardened as a whole, 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 reduction portion 1012d, which is disposed at an end of the first blade 1012, and is disposed behind the first cutting edge 1012c and in front of the second cutting edge 1013c along the rotation direction 10a ', that is, That is, the weight reduction portion 1012d is a portion of the end portion of the first blade 1012 opposite to the first cutting edge 1012c.
- the weight-reducing portion 1012d is symmetrically disposed 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.
- the space between the cutting edges 1013c is beneficial for the secondary cutting of the vegetation cut by the first cutting edge 1012c.
- the first blade 1012 further includes a yielding edge 1012e that is inclined or curved relative to the trailing edge of the first blade 1012, and the yielding edge 1012e is disposed at the trailing edge of the end of the first blade 102.
- the relief edge 1012e is a part of the edge of the weight reduction 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.
- the side edge 1012e is positioned in front of the second cutting edge 1013c; the projection of the side edge 1012e on the ground and the projection of the second cutting edge 1013c on the ground do not intersect. That is to say, the projection edge 1012e and the second cutting edge 1013c in the plane parallel to the ground surface have no overlapping portions because the projection edge 1012e is inclined or curved forward relative to the trailing edge of the first blade 1012.
- the relief edge 1012e and the trailing edge of the first blade 1012 constitute a continuous curve having at least one bending point B.
- the projection of the bending point B on the ground is located at the second cut along the rotation direction 10a '.
- the blade 1013c is ahead of the projection of the ground. That is, the bending point B formed by the position edge 1012e and the trailing 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 of the projection in the plane of the second blade 1013 to the second cutting edge 1013c is greater than zero.
- the yielding edge 1012e and the trailing edge of the first blade 1012 may form multiple bending points.
- the multiple bending points should also meet the above conditions, that is, the bending points are 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 0.
- the length L3 of the side edge 1012e is 40 mm or more and 150 mm or less. In one embodiment, the length L3 of the side edge 1012e is 70 mm or more and 100 mm or less. In this embodiment, let The length L3 of the bit edge 1012e is about 95 mm.
- the projection of the yielding 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 the second cutting, while making the yielding edge 1012e and the second cutting edge 1013c The space formed between them is larger, and it is convenient for the vegetation cut by the first cutting edge 1012c to rebound and fall into the space for secondary cutting by the second cutting edge 1013c, thereby improving the cutting efficiency of the lawnmower 10.
- the extension line of the yielding edge 1012e and the extension line of the second cutting edge 1013c form an included angle.
- the yielding edge 1012e The included 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.
- the extension line of the yielding edge 1012e and the extension line of the second cutting edge 1013c The included angle between them is 25 degrees or more and 35 degrees or less. In this implementation, the included angle is about 30 degrees.
- the second blade 1013 further includes raised portions 1013d provided at both ends of the second blade 1013.
- the raised portions 1013d are upwardly tilted and symmetrically distributed at both ends of the second blade 1013 with respect to the drive shaft 1011.
- the second blade 1013 is generated during rotation. After the airflow is lifted by the warping portion 1013d, it can bring up the broken grass cut by the second blade 1013 and throw it upward, so that the second blade 1013 has good performance of throwing broken grass.
- a noise reduction portion capable of reducing noise is also provided near the raised portion 1013d, and the noise reduction portion is a noise reduction groove that is recessed inward.
- FIG. 47 and FIG. 48 are schematic diagrams of the lawn mower 30 provided in the fourteenth embodiment of the present application.
- the lawn mower 30 is a hand-held lawn mower, or a riding lawn mower.
- the lawn mower 30 includes a blade assembly 301, a transmission mechanism, a motor, a casing 302, a handle 303, and a wheel 304.
- the motor-driven blade assembly 301 rotates along the cutting direction 30a 'with the rotation axis 301' as an axis, wherein the cutting direction 30a 'is a clockwise or counterclockwise direction with the rotation axis 301' as a 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 casing 302 fixes or houses the motor.
- the casing 302 serves as a main frame structure of the lawn mower and assembles a plurality of parts into one body.
- the lawn mower 30 also includes a battery pack that powers the motor.
- the casing 302 includes a motor casing and a main casing.
- the motor case is configured to hold or house the motor.
- the motor case is connected to the main case.
- a circuit board is provided in the casing 302 to control the motor.
- the handle 303 is formed with a grip portion for a user to grip.
- the handle 303 may be formed by the casing 302 or may be mounted to the casing 302 as a separate part.
- the lawnmower 30 further includes a connecting rod connecting the handle 303 and the casing 302, and the connecting rod is retractable and rotatable relative to the casing 302.
- the lawn mower 30 further 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.
- the blade assembly 301 includes a blade 3011 and a rotating shaft 3012.
- the rotating shaft 3012 is centered on the rotation axis 301 ′.
- the blade 3011 is symmetrical about the center of the rotation axis 301 ′.
- the blade 3011 extends along a straight line. Normally 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 from the ground than the bottom surface 3011a.
- the bottom surface 3011a and the top surface 3011b are parallel to each other and are perpendicular to the rotation axis 301 '.
- the bottom surface 3011a is a curved surface, at least a part of the bottom surface 3011a is inclined with respect to the top surface 3011b; in an 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 where the cutting surface 3011c is located intersects the plane where the bottom surface 3011a and the top surface 3011b are located 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.
- the blade 3011 further includes a cutting portion 3011d, which is located at one end of the blade 3011 and located at a leading edge of the blade 3011 in the cutting direction 30a '.
- the leading edge indicates that the blade 3011 first touches the edge of the vegetation when it is rotated in the cutting direction 30a ', and the edge that touches the vegetation after the leading edge is the trailing edge, as shown in FIG. 49.
- the blade 3011 includes two cutting portions 3011d. The two cutting portions 3011d are respectively located at two ends of the blade 3011 and located at the leading 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.
- 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 and form Cutting edge; in one embodiment, the plane where the cutting surface 3011c is located intersects the bottom surface 3011a obliquely, but the cutting surface 3011c does not directly intersect the bottom surface 3011a; in comparison, the cutting portion 3011d with the cutting edge is sharper and the cutting efficiency is also higher.
- the cutting portion 3011d is composed of a main body portion 3011e and a hardened portion 3011f.
- the hardened portion 3011f extends inward along the end of the blade 3011 and extends from the bottom surface 3011a to the top surface 3011b of the blade 3011.
- the hardened portion 3011f is a partially cut portion.
- a hardened layer formed after 3011d is laser-quenched, and the body portion 3011e is not subjected to laser quenching.
- the surface hardness of the hardened portion 3011f is greater than the surface hardness of the body portion 3011e.
- the ratio of the surface hardness of the hardened portion 3011f of the blade 3011 to the surface hardness of the 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 and the surface hardness of the body portion 3011e The ratio of the surface hardness is more than 1.2 and 2 or less.
- the surface hardness distribution of the hardened portion 3011f and the body portion 3011e makes the structure of the blade 3011 more reasonable.
- the hardened portion 3011f is a cutting portion 3011d near the bottom and the end of the blade 3011. This part of the cutting portion 3011d is a high-frequency region for cutting vegetation.
- the higher surface hardness of the hardened portion 3011f can make the blade 3011 have better abrasion resistance and higher cutting efficiency, and also improve the reliability and service life of the blade 3011 of the lawnmower 30.
- the method for manufacturing the blade 3011 includes: laser cutting and forming, laser cutting the metal plate to obtain the blade 3011 in an unsharpened state; laser quenching, laser hardening the area where the hardened portion 3011f is located, and improving the surface hardness of the area; Processing the cutting portion 3011d to grind the blade 3011 in an unsharpened state to process the cutting portion 3011d; and grinding the blade 3011 to grind the blade 3011 to remove burrs generated during the processing of the blade 3011.
- the area where the hardened portion 3011f is located is shown in FIG. 49 and FIG. 50.
- the hardened portion 3011f has a trapezoidal cross section and a rectangular cross section.
- the length L of the hardened portion 3011f is 50 mm or more and 120 mm or less; the lateral width W of the hardened portion 3011f is 2 mm or more and 8 mm or less; the depth H of the hardened portion 3011f is more than 0.2 mm and 1 mm or less.
- the depth H of the hardened portion 3011f is larger than 0.3 mm and smaller than or equal to 0.6 mm.
- the length L of the hardened portion 3011f is approximately 100 mm; the lateral width W of the hardened portion 3011f is approximately 5 mm, which is approximately equal to the lateral width of the cutting portion 3011d; and the depth H of the hardened portion 3011f is approximately 0.5 mm.
- the depth H of the hardened portion 3011f refers to the depth of the hardened layer obtained after the laser hardening of the blade 3011.
- the above-mentioned size setting of the hardened portion 3011f of the blade 3011 can save the manufacturing cost while ensuring the cutting strength.
- the above size design makes the cutting portion 3011d still wear after being worn. Able to stay sharp for a long time.
- the ratio of the surface hardness of the hardened portion 3011f to the depth of the hardened portion 3011f is 1000 HV1 / mm or more and 2000 HV1 / mm or less; in one embodiment, the surface hardness of the hardened portion 3011f and the depth of the hardened portion 3011f The ratio is 1100HV1 / mm or more and 1500HV1 / mm or less.
- the surface hardness of the body portion 3011e is 350 HV1 or more and 500 HV1 or less, and the surface hardness of the hardened portion 3011f is 550 HV1 or more and 750 HV1 or less; in one embodiment, the surface hardness of the body portion 3011e is 380 HV1 or more The surface hardness of the hardened portion 3011f is 600 HV1 or more and 700 HV1 or less.
- the blade assembly 301 further includes a bearing, a connector or a fastener provided to fix and connect the blade 3011, and the like.
- FIG. 51 and FIG. 52 are schematic diagrams of a blade assembly 401 and a blade of a lawn mower provided in Embodiment 15 of the present application, respectively.
- 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 on top of each other to form a synchronous rotation about the rotation axis 401 '; in an embodiment, the first blade 4012 and the second blade 4013 They are stacked on top of each other to form a non-synchronous rotation about the rotation axis 401 '.
- 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
- the second blade 4013 includes a second cutting portion 4013d.
- the structural features such as the hardened portion and the body portion in the fourteenth embodiment are applicable to the first blade 4012 and the second blade 4013 in this embodiment.
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Abstract
Description
Claims (99)
- 一种割草机,包括:刀片组件,设置为执行切割功能;底盘,形成有容纳至少部分所述刀片组件的容纳空间;电机,设置为驱动所述刀片组件以转动轴线为轴转动;及电池包,设置为给所述电机提供电力来源;其中,所述刀片组件包括:设置为割草的第一切割部;及设置为割草的第二切割部;其中,在沿平行于所述转动轴线的方向上,所述第二切割部位于所述第一切割部的下侧;所述电池包包括:电池包壳体;及电芯单元,设置于所述电池包壳体内;所述刀片组件在垂直于所述转动轴线的平面内的投影的任意两点以及所述转动轴线在所述平面内的投影的连线的长度的最大值为所述刀片组件的旋转直径;其中,所述刀片组件的旋转直径D(mm)、所述电池包中所包含的电芯单元的数量N和所述刀片组件的质量M(g)三者的乘积大于等于3.5×105(mm·g)且小于等于7.3×107(mm·g)。
- 根据权利要求1所述的割草机,其中,所述刀片组件的旋转直径D(mm)、所述电芯单元的数量N和所述刀片组件的质量M(g)三者的乘积大于等于7×105(mm·g)且小于等于3.6×107(mm·g)。
- 根据权利要求2所述的割草机,其中,所述刀片组件的旋转直径D(mm)、所述电芯单元的数量N和所述刀片组件的质量M(g)三者的乘积大于等于1.4×106(mm·g)且小于等于1.8×107(mm·g)。
- 根据权利要求1所述的割草机,其中,所述刀片组件还包括:第一刀片,所述第一切割部形成于所述第一刀片;及第二刀片,所述第二切割部形成于所述第二刀片;其中,所述第一刀片和所述第二刀片一体成型或者分体式成型。
- 根据权利要求1所述的割草机,其中,所述电机的输出扭矩大于等于0且小于等于10N·m。
- 根据权利要求1所述的割草机,其中,所述电机的输出扭矩大于等于3N·m 且小于等于8N·m。
- 根据权利要求1所述的割草机,还包括风扇,所述风扇固定连接至所述电机的输出轴且以所述转动轴线为轴转动;所述风扇安装至所述刀片组件的上方且抵持至所述刀片组件。
- 根据权利要求1所述的割草机,其中,所述底盘上设有排出草屑的出草口,所述刀片组件的刀尖线速度大于等于40m/s且小于等于100m/s时,所述出草口的平均风速大于等于3m/s且小于等于25m/s。
- 根据权利要求1所述的割草机,还包括设置为控制所述电机运转的控制系统,所述割草机在空载时,所述电机的输入功率、所述控制系统的输入功率以及所述刀片组件的输入功率之和为所述割草机的空载输入功率;所述空载输入功率大于等于100W且小于等于380W。
- 根据权利要求1所述的割草机,其中,所述刀片组件的转动惯量大于等于8000kg·mm 2且小于等于23000kg·mm 2。
- 根据权利要求1所述的割草机,其中,所述第一切割部和所述第二切割部所构成的相位角大于等于0度且小于90度。
- 根据权利要求1所述的割草机,其中,所述刀片组件在垂直于所述转动轴线的平面内的投影的任意两点以及所述转动轴线在所述平面内的投影的连线的长度的最大值为所述刀片组件的旋转直径D;所述旋转直径D大于等于200mm且小于等于700mm。
- 根据权利要求1所述的割草机,其中,所述刀片组件的质量大于等于0.35kg且小于等于1.8kg。
- 根据权利要求1所述的割草机,其中,所述第一切割部的数量大于等于2且小于等于8;所述第二切割部的数量大于等于2且小于等于8。
- 根据权利要求1所述的割草机,其中,所述第一切割部在垂直于所述转动轴线的平面内的投影的长度大于等于10mm且小于等于600mm;所述第二切割部在垂直于所述转动轴线的平面内的投影的长度大于等于10mm且小于等于600mm。
- 根据权利要求1所述的割草机,其中,所述刀片组件包括:第一刀片,所述第一切割部形成于所述第一刀片;及第二刀片,所述第二切割部形成于所述第二刀片;其中,所述第一刀片和所述第二刀片构成的整体以所述转动轴线为轴转动 时,所述第一切割部和所述第二切割部能执行割草功能;定义包裹所述第一刀片和所述第二刀片的最小圆柱体的体积为所述刀片组件的扫掠体积,在所述刀片组件绕所述转动轴线转动时,所述第一切割部和所述第二切割部均位于所述最小圆柱体所围绕而成的空间内;其中,所述刀片组件的扫掠体积大于等于400cm 3且小于等于8000cm 3。
- 根据权利要求16所述的割草机,其中,所述刀片组件的扫掠体积大于等于600cm 3且小于等于6800cm 3。
- 根据权利要求17所述的割草机,其中,所述刀片组件的扫掠体积大于等于1000cm 3且小于等于5000cm 3。
- 根据权利要求16所述的割草机,其中,所述第一刀片和所述第二刀片一体成型或者分体式成型。
- 根据权利要求16所述的割草机,其中,所述第一刀片与所述第二刀片分体式成型;所述第一刀片与所述第二刀片的质量之比大于等于0.5且小于等于1。
- 根据权利要求16所述的割草机,其中,所述第一刀片在垂直于所述转动轴线的平面内的投影的任意两点以及所述转动轴线在所述平面内的投影的连线的长度的最大值为所述第一刀片的旋转直径;所述第二刀片在垂直于所述转动轴线的平面内的投影中的任意两点以及所述转动轴线在所述平面内的投影的连线的长度的最大值为所述第二刀片的旋转直径;所述第一刀片的旋转直径约等于所述第二刀片的旋转直径。
- 根据权利要求16所述的割草机,其中,所述第一刀片在垂直于所述转动轴线的平面内的投影在垂直所述第一刀片的旋转直径方向上任意两点的连线的长度的最大值为所述第一刀片的宽度,所述第一刀片的旋转直径与所述第一刀片的宽度的比值大于等于5且小于等于13;所述第二刀片在垂直于所述转动轴线的平面内的投影在垂直所述第二刀片的旋转直径方向上任意两点的连线的长度的最大值为所述第二刀片的宽度,所述第二刀片的旋转直径与所述第二刀片的宽度的比值大于等于5且小于等于13。
- 根据权利要求16所述的割草机,其中,所述第一切割部的数目和所述第二切割部的数目之和为所述刀片组件的切割部数,所述刀片组件的扫掠体积与所述刀片组件的切割部数的比值大于等于50cm 3/个且小于等于4000cm 3/个。
- 根据权利要求1所述的割草机,其中,所述电机设置为驱动所述刀片组 件绕所述转动轴线转动且所述刀片组件的刀尖线速度大于等于40m/s且小于等于100m/s时,所述电池包消耗100WH的能量下所述割草机的工作时长定义为所述割草机的百瓦时续航时间,其中,所述割草机的百瓦时续航时间大于等于4min且小于等于30min。
- 根据权利要求24所述的割草机,其中,所述割草机的百瓦时续航时间大于等于5min且小于等于20min。
- 根据权利要求25所述的割草机,其中,所述割草机的百瓦时续航时间大于等于6min且小于等于15min。
- 根据权利要求24所述的割草机,还包括设置为控制所述电机运转的控制系统,所述割草机在空载时所述电机的输入功率、所述控制系统的输入功率以及所述刀片组件的输入功率之和为所述割草机的空载输入功率;所述空载输入功率大于等于100W且小于等于380W。
- 根据权利要求24所述的割草机,其中,所述刀片组件还包括第一刀片,所述第一切割部和所述第二切割部设置于一体成型的所述第一刀片上。
- 根据权利要求24所述的割草机,其中,所述第一刀片的质量与所述第二刀片的质量之比大于等于0.5且小于等于1。
- 根据权利要求1所述的割草机,其中,在所述电机驱动所述刀片组件以所述转动轴线为轴空载转动时,所述电池包消耗100WH的能量下所述割草机的工作时长定义为所述割草机的空载续航时间,所述割草机的空载续航时间大于等于9min且小于等于35min。
- 根据权利要求30所述的割草机,其中,所述割草机的空载续航时间大于等于12min且小于等于33min。
- 根据权利要求31所述的割草机,其中,所述割草机的空载续航时间大于等于18min且小于等于30min。
- 根据权利要求1所述的割草机,还包括:驱动轴,连接至所述电机且设置为驱动所述刀片组件绕所述转动轴线转动;及安装组件,具有将所述刀片组件安装至所述驱动轴以使所述刀片组件随所述驱动轴转动的第一安装状态;所述安装组件还具有通过安装所述第一切割部或所述第二切割部以执行切割功能的第二安装状态。
- 根据权利要求33所述的割草机,其中,所述安装组件包括驱动所述刀 片组件以转动轴线为轴转动的驱动件;所述刀片组件设置为抵持至所述驱动件的表面且与所述驱动件构成摩擦传动;所述驱动件连接至所述驱动轴。
- 根据权利要求34所述的割草机,其中,所述驱动件与所述刀片组件在垂直于所述转动轴线的平面内构成面接触;所述驱动件与所述刀片组件的接触面积大于等于200mm 2且小于等于1000mm 2。
- 根据权利要求1所述的割草机,其中,所述第一切割部基本沿第一直线方向延伸;所述第二切割部基本沿第一曲线方向延伸。
- 根据权利要求36所述的割草机,其中,所述第一切割部基本沿第二曲线方向延伸;所述第二切割部基本沿第三曲线方向延伸。
- 根据权利要求33所述的割草机,其中,所述刀片组件形成有至少一个与所述驱动轴配合的安装孔。
- 根据权利要求33所述的割草机,其中,所述安装组件与所述刀片组件接触构成至少一个垂直于所述转动轴线的安装面;所述刀片组件设置为切割时形成有至少一个垂直于所述转动轴线的切割面;所述安装面沿所述转动轴线方向位于所述切割面的上方。
- 根据权利要求33所述的割草机,其中,所述刀片组件还包括设置为限定所述第一切割部与所述第二切割部构成的相位角的范围的定位部。
- 根据权利要求40所述的割草机,其中,所述定位部具有一个几何中心,所述几何中心至所述转动轴线的距离为定位半径,所述定位半径大于0mm且小于等于50mm。
- 根据权利要求1所述的割草机,还包括:驱动轴,连接至所述电机且设置为驱动所述刀片组件绕所述转动轴线转动;第一类刀片组件,设置为执行切割功能;第二类刀片组件,包含一个切割部;及安装组件,具有将所述第一类刀片组件安装至所述驱动轴以使所述第一类刀片组件随所述驱动轴转动的第一安装状态;所述安装组件还具有在所述第一类刀片组件被拆卸时将所述第二类刀片组件安装至所述驱动轴的第二安装状态。
- 根据权利要求1所述的割草机,还包括:驱动轴,连接至所述电机且设置为驱动所述刀片组件绕所述转动轴线转动;第一类刀片组件,设置为执行切割功能;第二类刀片组件,包括两个切割部;及安装组件,具有将所述第一类刀片组件安装至所述驱动轴以使所述刀片组件随所述驱动轴转动的第一安装状态;其中,所述第一类刀片组件包括:第一刀片,所述第一切割部形成于所述第一刀片且所述第一切割部设置为割草;所述安装组件还具有将所述第一类刀片组件拆卸下将所述第二类刀片组件安装至所述驱动轴以执行切割功能的第二安装状态;其中,所述第二类刀片组件的两个切割部在沿所述转动轴线方向上分别位于所述第二类刀片组件的上下两侧。
- 根据权利要求1所述的割草机,还包括:驱动轴,设置为驱动所述刀片组件以所述转动轴线为轴转动;所述刀片组件包括:第一刀片,所述第一切割部形成于所述第一刀片;第二刀片,所述第二切割部形成于所述第二刀片;及连接组件,设置为连接所述第二刀片至所述第一刀片以使所述刀片组件在未安装至所述驱动轴时构成一个能一起移动的整体;其中,在所述连接组件连接所述第二刀片至所述第一刀片后,在沿所述转动轴线方向上,所述第二切割部和所述第一切割部位于不同的轴向位置。
- 根据权利要求44所述的割草机,其中,在所述连接组件连接第二刀片至所述第一刀片时,所述第二刀片相对所述第一刀片在预设角度范围内固定。
- 根据权利要求44所述的割草机,其中,所述刀片组件形成有至少一个与所述连接组件相连的定位部。
- 根据权利要求46所述的割草机,其中,所述连接组件包括与所述定位部配合的配合部。
- 根据权利要求46所述的割草机,其中,所述刀片组件包括偶数个关于所述转动轴线对称设置的所述定位部。
- 根据权利要求44所述的割草机,其中,所述连接组件还包括设置为在平行于所述转动轴线的方向上,固定所述第一刀片与所述第二刀片的相对位置的轴向固定部。
- 根据权利要求1所述的割草机,其中,所述刀片组件包括:第一刀片,形成有所述第一切割部;及第二刀片,形成有所述第二切割部;其中,在围绕所述转动轴线的圆周方向上,所述第一切割部设置于所述第二切割部的前侧;所述第二切割部设置于所述第二刀片的前侧边缘,所述第二刀片的后侧形成有设置为导向气流向上运动的第一导向部和第二导向部。
- 根据权利要求50所述的割草机,其中,所述第一导向部和所述第二导向部均沿曲面延伸;至少部分所述第一导向部与至少部分所述第二导向部具有不同的曲率。
- 根据权利要求50所述的割草机,其中,所述第二刀片的后侧形成有包括所述第一导向部和所述第二导向部的至少三个导向部。
- 根据权利要求50所述的割草机,其中,所述第一导向部的外侧和所述第二导向部的外侧形成有切割部口。
- 根据权利要求50所述的割草机,其中,所述第一导向部的外侧和所述第二导向部外侧基本沿同一直线延伸。
- 根据权利要求54所述的割草机,其中,所述第一导向部外侧的延长线与所述第二切割部的延长线倾斜相交。
- 根据权利要求50所述的割草机,其中,所述第一导向部的曲率半径大于等于0且小于等于100mm;所述第二导向部的曲率半径大于等于0且小于等于100mm。
- 根据权利要求1所述的割草机,还包括:驱动轴,连接至所述电机且设置为驱动所述刀片组件以所述转动轴线为轴转动;所述刀片组件包括:第一刀片,所述第一切割部形成于所述第一刀片;及第二刀片,所述第二切割部形成于所述第二刀片;其中,所述第一刀片和所述第二刀片中的一个上形成有定位部,另一个上形成有与所述定位部配合的配合部;在所述定位部和所述配合部相互配合时,所述第二刀片相对所述第一刀片在围绕所述转动轴线的圆周方向上固定或者能在预设角度范围内转动。
- 根据权利要求57所述的割草机,其中,所述预设角度范围大于等于0度且小于等于20度。
- 根据权利要求57所述的割草机,其中,所述定位部为定位孔或者定位槽;所述配合部为与所述定位孔或者所述定位槽构成配合的凸起部。
- 根据权利要求57所述的割草机,其中,所述定位部和所述配合部关于所述转动轴线对称设置。
- 根据权利要求1所述的割草机,还包括:驱动轴,连接至所述电机且设置为驱动所述刀片组件以所述转动轴线为轴转动;所述刀片组件还包括:第一刀片,所述第一切割部形成于所述第一刀片;第二刀片,所述第二切割部形成于所述第二刀片;及连接组件,设置为连接所述刀片组件以使所述第二刀片相对所述第一刀片在围绕转动轴线的圆周方向上固定或者在预设角度范围内转动。
- 根据权利要求61所述的割草机,其中,所述连接组件形成有连接所述第一刀片的第一连接部和连接所述第二刀片的第二连接部。
- 根据权利要求61所述的割草机,其中,所述连接组件包括对所述刀片组件进行轴向夹紧的压紧件,所述压紧件连接至所述刀片组件且与所述刀片组件构成面接触。
- 根据权利要求1所述的割草机,其中,所述刀片组件包括第一刀片,所述第一切割部和所述第二切割部均设置于所述第一刀片上。
- 根据权利要求61所述的割草机,还包括:安装组件,设置为将所述刀片组件安装至所述驱动轴;所述安装组件包括:驱动件,设置为驱动所述刀片组件以所述转动轴线为轴转动,所述刀片组件可拆卸连接至所述驱动件;及驱动部,固定连接至所述驱动件或者与所述驱动件一体成型;所述驱动部设置为连接所述刀片组件以使所述刀片组件相对于所述驱动件构成沿所述转动轴线周向上的固定连接,或者设置为使所述刀片组件能够相对于所述驱动件沿所述转动轴线的周向在预设角度范围内转动。
- 根据权利要求65所述的割草机,其中,所述安装组件还包括:压紧组件,设置为沿所述转动轴线方向夹紧所述刀片组件,所述刀片组件在沿平行于所述转动轴线的方向上设置于所述驱动件和所述压紧组件之间;及紧固组件,设置为在平行于所述转动轴线的方向固定所述刀片组件相对于所述驱动件的位置,所述紧固组件可拆卸连接至所述驱动轴。
- 根据权利要求66所述的割草机,其中,所述安装组件还包括绝缘件,所述绝缘件设置为将所述刀片组件和所述驱动轴之间绝缘;所述绝缘件由绝缘材料制成;所述绝缘件沿所述转动轴线方向设置于所述压紧组件和所述刀片组件之间。
- 根据权利要求67所述的割草机,其中,所述第一刀片和所述第二刀片均设置于所述驱动件和所述绝缘件之间。
- 根据权利要求67所述的割草机,其中,所述第一刀片设置于所述驱动件和所述绝缘件之间;所述第二刀片设置于所述绝缘件和所述压紧组件之间。
- 根据权利要求65所述的割草机,其中,所述驱动件为风扇或者法兰。
- 根据权利要求66所述的割草机,其中,所述压紧组件包括金属垫片;所述紧固组件包括螺栓或者螺钉与螺母的组合。
- 根据权利要求1所述的割草机,还包括:主机,安装有所述刀片组件;操作装置,设置为供用户操作以控制所述主机;连杆组件,包括连接所述主机和所述操作装置的连杆;照明组件,包括照明元件和设置为供用户操作以控制所述照明元件的照明开关;及状态显示组件,包括可显示所述割草机的工作状态的状态显示灯;其中,定义位于所述连杆组件的第一端的区域的为操作区域,位于所述连杆组件的第二端的区域为工作区域,所述操作装置位于所述操作区域内,所述主机位于所述工作区域内;所述照明元件位于所述工作区域内且安装至所述主机,所述照明开关和所述状态显示灯位于所述操作区域内。
- 根据权利要求72所述的割草机,其中,所述连杆的数目为两个;所述连杆组件还包括:扶手,设置为连接两个所述连杆并位于所述连杆的远离所述主机的一端;所述操作装置还包括:操作台,设置为连接两个所述连杆并位于所述扶手和所述主机之间;所述照明开关和所述状态显示灯设置于所述操作台上。
- 根据权利要求73所述的割草机,其中,所述操作装置包括扳机,所述扳机与所述操作台连接,所述扳机设置为供用户操作以启动所述割草机;所述照明开关和所述状态显示灯位于所述扳机和所述主机之间。
- 根据权利要求74所述的割草机,其中,所述操作台上还设置有安全开关,在所述安全开关和所述扳机中的一个未被触发时所述割草机处于停机状态;所述照明开关和所述状态显示灯分别位于所述安全开关的两侧。
- 根据权利要求72所述的割草机,其中,所述连杆的数目为两个,所述两个连杆分别对称设置在预设平面的两侧;所述照明开关和所述状态显示灯分别设置在所述预设平面的两侧。
- 根据权利要求72所述的割草机,其中,所述连杆的数目为两个;所述连杆组件还包括:扶手,设置为连接两个所述连杆并位于所述连杆的远离所述主机的一端;所述扶手包括横杆,所述横杆沿与所述连杆垂直的方向延伸;所述照明开关与所述横杆之间的最小距离大于等于0厘米且小于等于30厘米。
- 根据权利要求72所述的割草机,其中,所述照明开关为薄膜开关。
- 根据权利要求72所述的割草机,其中,所述电池包安装至所述主机;所述状态显示灯设置为显示所述电池包的剩余电量是否小于预设电量的电量状态显示灯。
- 根据权利要求1所述的割草机,还包括:一组行走轮,对称设置在第一平面的两侧;所述底盘包括:涡流部,设置为沿着围绕所述转动轴线的圆周方向延伸以在所述容纳空间内形成涡流;导出部,设置在所述涡流的流通路径上以导向所述涡流沿所述涡流的切向流出;及止挡部,设置为阻止至少部分所述涡流在流经所述导出部时继续在所述涡流部内循环;其中,所述止挡部的至少一部分和所述导出部的至少一部分位于所述第一平面的同侧。
- 根据权利要求80所述的割草机,其中,所述止挡部形成有设置为止挡气流的止挡面,所述止挡面的至少一部分和所述导出部的至少一部分位于所述 第一平面的同侧。
- 根据权利要求81所述的割草机,其中,所述止挡面和所述导出部均位于所述第一平面的同侧。
- 根据权利要求81所述的割草机,其中,所述止挡面和所述导出部的至少一部分位于所述第一平面的同侧。
- 根据权利要求80所述的割草机,其中,所述电机包括设置为驱动所述刀片组件转动的电机轴;所述底盘还形成有使所述电机轴通过的安装孔;在沿垂直于所述第一平面的方向上,至少部分所述止挡部位于所述导出部和所述安装孔之间。
- 根据权利要求80所述的割草机,其中,所述止挡部和所述导出部均设置为经过所述转动轴线且位于垂直于所述第一平面的第二平面的同侧。
- 根据权利要求80所述的割草机,其中,所述止挡部在沿所述转动轴线的方向上的长度与所述涡流部在沿所述转动轴线方向上的深度的比值大于等于0.1且小于等于0.5。
- 根据权利要求81所述的割草机,其中,所述涡流部包括:内圈,围绕所述转动轴线设置;及外圈,围绕所述内圈设置,所述外圈和所述内圈之间形成所述涡流部的流通路径;所述导出部包括:第一导出面,连接所述内圈;及第二导出面,连接所述外圈;所述止挡面设置于所述第一导出面处。
- 根据权利要求87所述的割草机,其中,所述止挡面自所述内圈延伸至所述外圈;所述涡流部还包括连接所述内圈和所述外圈的底面,所述止挡部还包括连接面,所述连接面设置为自所述止挡面远离所述底面的一侧沿与所述止挡面倾斜相交的平面延伸,所述连接面连接所述止挡面和所述底面。
- 根据权利要求80所述的割草机,其中,所述止挡部与所述涡流部一体成型。
- 根据权利要求80所述的割草机,其中,所述止挡部位于所述涡流部内,且所述止挡部位于所述导出部的边缘处。
- 根据权利要求1所述的割草机,其中,所述刀片组件还包括实现切割功 能的第一刀片和第二刀片;其中,所述第一刀片相对于地面位于所述第二刀片的上方;所述第一刀片在沿所述转动轴线转动的方向上位于所述第二刀片的前方;所述第一切割部设置于所述第一刀片的端部的前缘;所述第二切割部设置于所述第二刀片的端部的前缘;所述第一刀片还包括:让位边,设置于所述第一刀片的端部的后缘;所述让位边相对所述第一刀片的后缘倾斜或弯曲;在沿所述转动方向上,所述让位边位于所述第二切割部的前方;所述让位边在地面的投影和所述第二切割部在地面的投影不相交。
- 根据权利要求91所述的割草机,其中,所述让位边和所述第一刀片的后缘构成至少具有一个弯折点的连续曲线,所述弯折点在地面的投影在沿所述转动轴线转动的方向上位于所述第二切割部在地面的投影的前方。
- 根据权利要求92所述的割草机,其中,所述弯折点在所述第二刀片所在平面内的投影到所述第二切割部的横向距离大于零。
- 根据权利要求91所述的割草机,其中,所述让位边的长度大于等于40毫米且小于等于150毫米。
- 根据权利要求91所述的割草机,其中,所述让位边的长度大于等于70毫米且小于等于100毫米。
- 根据权利要求91所述的割草机,其中,所述刀片组件还包括连接组件,所述第一刀片和所述第二刀片分别包括与所述连接组件构成固定连接的第一安装部和第二安装部。
- 根据权利要求91所述的割草机,其中,所述第二刀片包括两个起翘部,所述两个起翘部分别设置于所述第二刀片的两端的后缘并向上翘起。
- 根据权利要求91所述的割草机,其中,所述让位边的延长线与所述第二切割部的延长线之间的角度大于等于15度且小于等于45度。
- 根据权利要求98所述的割草机,其中,所述让位边的延长线与所述第二切割部的延长线之间的角度大于等于25度且小于等于35度。
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CN201980062843.5A CN113226012B (zh) | 2018-09-27 | 2019-09-25 | 割草机 |
EP19866834.5A EP3821692A4 (en) | 2018-09-27 | 2019-09-25 | LAWN MOWER |
AU2019346954A AU2019346954B2 (en) | 2018-09-27 | 2019-09-25 | Lawn mower |
CA3114468A CA3114468C (en) | 2018-09-27 | 2019-09-25 | Lawn mower |
US17/164,479 US11122737B2 (en) | 2018-09-27 | 2021-02-01 | Blade assembly for a lawn mower |
US17/236,239 US11246260B2 (en) | 2018-09-27 | 2021-04-21 | Lawn mower with blade and mounting assembly |
US17/573,153 US20220124976A1 (en) | 2018-09-27 | 2022-01-11 | Lawn mower |
US17/825,815 US11917939B2 (en) | 2018-09-27 | 2022-05-26 | Blade assembly for a lawn mower |
US17/863,038 US11937545B2 (en) | 2018-09-27 | 2022-07-12 | Blade assembly for a lawn mower |
US29/865,322 USD995568S1 (en) | 2018-09-27 | 2022-07-19 | Mower blade assembly |
US29/865,320 USD996470S1 (en) | 2018-09-27 | 2022-07-19 | Mower blade assembly |
US29/865,324 USD996471S1 (en) | 2018-09-27 | 2022-07-19 | Mower blade assembly |
US29/865,321 USD995567S1 (en) | 2018-09-27 | 2022-07-19 | Mower blade assembly |
US29/865,323 USD997998S1 (en) | 2018-09-27 | 2022-07-19 | Mower blade |
US29/865,427 USD995569S1 (en) | 2019-04-18 | 2022-07-25 | Mower blade assembly |
US18/076,847 US11997944B2 (en) | 2018-09-27 | 2022-12-07 | Blade assembly for a lawn mower |
US18/163,609 US20230172102A1 (en) | 2018-09-27 | 2023-02-02 | Blade assembly for a lawn mower |
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CN201920533524.5 | 2019-04-18 | ||
CN201910312144.3 | 2019-04-18 | ||
CN201920533524.5U CN210113796U (zh) | 2019-04-18 | 2019-04-18 | 手推式动力工具 |
CN201910312144.3A CN111819987B (zh) | 2019-04-18 | 2019-04-18 | 割草机 |
CN201910576318.7 | 2019-06-28 | ||
CN201910576318.7A CN110946001A (zh) | 2018-09-27 | 2019-06-28 | 割草机以及适用于割草机的刀片组件 |
CN201921545742.7U CN211020047U (zh) | 2019-09-17 | 2019-09-17 | 压草组件和包括该压草组件的割草机 |
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