Lawn mower cutting device and lawn mower

Abstract

A lawn mower cutting device (1) is disclosed, comprising a cutting unit (3') configured to rotate about a rotation axis (Ax). The cutting unit (3') comprises a cutting disc (3) and an anti-slip plate (5). The anti-slip plate (5) comprises at least one through hole (6) and the cutting disc (3) comprises a plurality of unobstructed through holes (4, 4', 4''), each unobstructed through hole being arranged such that, when the anti-slip plate (5) is in a predetermined relative rotational position with respect to the cutting disc (3), at least a portion of the at least one through hole (6) of the anti-slip plate (5) overlaps at least a portion of one of the plurality of through holes (4, 4', 4'') of the cutting disc (3), as seen in a direction (dA) parallel to the rotation axis (Ax). The disclosure also relates to a lawn mower (2) comprising a lawn mower cutting device (1).

Description

Technical Field

[0001] This disclosure relates to a lawn mower cutting device including a cutting unit and an anti-slip plate. This disclosure also relates to a lawn mower including a lawn mower cutting device. Background Technology

[0002] A lawnmower is a device that cuts grass on a lawn. Various types of lawnmowers are available on the market today. Examples include push mowers and self-propelled robotic lawnmowers. Push mowers typically include a long, thin handle that allows the user to push and / or guide the mower. Some push mowers include a propulsion system configured to drive one or more wheels. Push mowers without a propulsion system are sometimes referred to as "push mowers." Some lawnmowers include a power unit configured to rotate the cutting unit and in the form of an electric motor, while others include a power unit configured to rotate the cutting unit and in the form of an internal combustion engine.

[0003] Self-propelled robotic lawnmowers are lawnmowers capable of autonomously cutting grass within an area. Some robotic lawnmowers require the user to set boundary cables around the lawn, defining the area to be mowed. These robotic lawnmowers use sensors to locate the cables and thus define the boundaries of the area to be mowed. In addition to the positioning cables, robotic lawnmowers may also include other types of positioning units and sensors, such as sensors for detecting events like collisions with objects within the area.

[0004] Robotic lawn mowers can move in systematic and / or random patterns to ensure that an area is completely cut. A robotic lawn mower typically includes one or more batteries and one or more electrically driven cutting units powered by those batteries. In some cases, robotic lawn mowers utilize cables to locate a recharging station for recharging the one or more batteries. Typically, robotic lawn mowers operate unattended within their operating area. Examples of such areas include lawns, gardens, parks, sports fields, golf courses, etc.

[0005] The anti-slip plate is a disc-shaped device attached below the cutting unit of the lawnmower, with one surface facing the ground during lawnmower operation. The anti-slip plate is arranged so that it can rotate independently of the cutting unit. The anti-slip plate reduces frictional losses that occur when the cutting unit engages with the vegetation being cut. In this way, the anti-slip plate reduces the energy required to cut the vegetation. Furthermore, the anti-slip plate protects the cutting unit from damage caused by collisions with harder objects.

[0006] Some lawnmower cutting units include a cutting disc and multiple cutting elements arranged around the perimeter of the cutting disc via corresponding fasteners. The cutting elements of the cutting unit can become dull during use. Therefore, it is best to replace the cutting elements of the cutting unit after a certain period of operation. Thus, in some cases, it may be necessary to remove the cutting elements from the cutting disc and reinstall new or sharp cutting elements.

[0007] Currently, when replacing the cutting component of the cutting unit, the user must first align the anti-slip plate relative to the cutting unit, ensuring the holes in the anti-slip plate align with the fasteners of the cutting component. Then, both the anti-slip plate and the cutting disc must be held firmly in place while applying torque, for example, using a tool (such as a screwdriver or power tool), to release the fasteners. This is cumbersome and time-consuming because the user must concentrate on alignment, remain still, find the correct position for the tool, and apply torque to the fasteners. During this process, the user may be cut by the cutting component, especially when using a power tool to remove the fasteners.

[0008] Furthermore, in today's consumer market, it is generally an advantage if a product (such as a lawnmower and related components, systems and devices) has conditions and / or characteristics suitable for cost-effective manufacturing and assembly. Summary of the Invention

[0009] The object of this invention is to overcome or at least mitigate some of the problems and disadvantages mentioned above.

[0010] According to a first aspect of the invention, this objective is achieved by a lawnmower cutting device comprising a cutting unit configured to rotate about an axis of rotation to cut grass. The cutting unit includes a cutting disc and a plurality of cutting members arranged at the periphery of the cutting disc. The cutting device includes a skid plate attachable relative to the cutting unit, such that the skid plate is freely rotatable relative to the cutting unit about the axis of rotation. The skid plate includes at least one through-hole arranged at a first radial distance from the axis of rotation. The cutting disc includes a plurality of unobstructed through-holes, each unobstructed through-hole being arranged such that, when the skid plate is in a predetermined relative rotational position relative to the cutting disc, viewed in a direction parallel to the axis of rotation, at least a portion of at least one through-hole of the skid plate overlaps with at least a portion of one of the plurality of through-holes of the cutting disc.

[0011] Therefore, a lawn mower cutting device is provided that greatly simplifies the process of changing multiple cutting components of the cutting unit. This is because when the anti-slip plate is in a predetermined relative rotational position with respect to the cutting disc, the anti-slip plate can be rotated and locked to the cutting disc by inserting an elongated object into at least one through hole of the anti-slip plate and one of the multiple through holes of the cutting disc.

[0012] In this way, the anti-slip plate can be fixed relative to the cutting unit in the correct position for replacing the cutting component, so that the user no longer needs to use one hand to keep the anti-slip plate and the cutting disc fixed relative to each other, and reduces the risk of the user being cut by the cutting component during the replacement of the cutting component.

[0013] Therefore, a lawn mower cutting device is provided that allows for the replacement of the cutting components of the cutting unit in a faster, simpler, more convenient, and safer manner.

[0014] Furthermore, due to these features of the lawn mower cutting device, a lawn mower cutting device is provided that enables the anti-slip plate to be fixed relative to the cutting unit without significantly increasing the complexity or manufacturing cost of the lawn mower cutting device. Therefore, a lawn mower cutting device is provided that has conditions and characteristics suitable for cost-effective manufacture and assembly.

[0015] Therefore, a lawn mower cutting device is provided that overcomes or at least mitigates some of the problems and disadvantages mentioned above. Thus, the aforementioned objective is achieved.

[0016] Optionally, the first radial distance is at least 50% of the radius of the anti-slip plate. Therefore, when an elongated object is inserted into at least one through hole of the anti-slip plate and one of the multiple through holes of the cutting disc, a secure and reliable rotational lock between the anti-slip plate and the cutting disc can be ensured.

[0017] Optionally, each of the plurality of through holes in the cutting disc is arranged at a first radial distance from the axis of rotation. Therefore, it is convenient to insert an elongated object into at least one through hole of the anti-slip plate and one of the plurality of through holes in the cutting disc. This is because the arrangement of the plurality of through holes in the cutting disc and at least one through hole in the anti-slip plate allows the elongated object to be inserted in an insertion direction parallel to the axis of rotation of the anti-slip plate and the cutting unit. Furthermore, a more robust and reliable rotational locking between the anti-slip plate and the cutting disc can be ensured.

[0018] Optionally, the diameter of at least one through-hole of the anti-slip plate substantially corresponds to the diameter of each of the plurality of through-holes of the cutting disc. Therefore, it is convenient to insert elongated objects into at least one through-hole of the anti-slip plate and one of the plurality of through-holes of the cutting disc. This is because elongated objects with a diameter slightly smaller than both the diameter of at least one through-hole of the anti-slip plate and the diameter of each of the plurality of through-holes of the cutting disc can be inserted into both. Furthermore, these features ensure a more robust and reliable rotational locking between the anti-slip plate and the cutting disc.

[0019] Optionally, each of the at least one through-hole of the anti-slip plate and each of the plurality of through-holes of the cutting disc has a diameter greater than 2 mm. This further ensures a secure and reliable rotational locking between the anti-slip plate and the cutting disc. This is because an elongated object with a diameter of at least 2 mm can be inserted into at least one through-hole of the anti-slip plate and one of the plurality of through-holes of the cutting disc.

[0020] Optionally, the cutting disc includes two to six (preferably three) equidistant through holes. Therefore, the anti-slip plate can be rotatably locked to the cutting unit at multiple predetermined relative rotational positions relative to the cutting disc, thereby further facilitating the process of changing the cutting components of the cutting disc while maintaining its rotational balance.

[0021] Alternatively, each of the plurality of cutting components is pivotally arranged at the periphery of the cutting disc. Thus, a safer cutting unit capable of energy-efficient operation is provided.

[0022] Optionally, each of the multiple cutting components is attached to the cutting disc by fasteners, and the anti-slip plate includes multiple orifices, each orifice arranged such that, when viewed in a direction parallel to the axis of rotation relative to the cutting unit, each orifice overlaps with a fastener. This greatly simplifies the process of replacing the cutting components of the cutting unit. This is because when the anti-slip plate is rotated and locked to the cutting disc at the predetermined relative rotational position relative to the cutting unit, the user can insert tools such as screwdrivers or power tools into the multiple orifices of the anti-slip plate to reach and loosen the fasteners.

[0023] According to the embodiments described herein, each of the plurality of openings in the anti-slip plate is spaced apart from at least one through-hole in the anti-slip plate. Similarly, according to the embodiments described herein, at least one through-hole in the anti-slip plate is spaced apart from the plurality of openings in the anti-slip plate.

[0024] Optionally, the number of holes included in the anti-slip plate is the same as the number of cutting components. This greatly simplifies the process of replacing the cutting components of the cutting unit. This is because when the anti-slip plate is rotated and locked to the cutting disc at a predetermined relative rotational position with respect to the cutting unit, the user can insert tools such as screwdrivers or power tools into the multiple holes of the anti-slip plate to reach and loosen all fasteners.

[0025] Optionally, the cutting disc includes at least one mark to indicate that the anti-slip plate is in a predetermined relative rotational position relative to the cutting unit. This further facilitates the process of inserting an elongated object into at least one through-hole of the anti-slip plate and one of the plurality of through-holes of the cutting disc. This is because, before inserting the elongated object into at least one through-hole of the anti-slip plate and one of the plurality of through-holes of the cutting disc, the user can use at least one mark on the cutting disc to orient the anti-slip plate to a predetermined relative rotational position relative to the cutting disc.

[0026] According to a second aspect of the invention, this objective is achieved by a lawn mower comprising a lawn mower body and a motor configured to rotate a cutting unit about a rotation axis, wherein the lawn mower includes a lawn mower cutting device according to some embodiments of the present disclosure.

[0027] Since the lawn mower includes a lawn mower cutting device according to some embodiments, a lawn mower is provided that greatly facilitates the process of changing multiple cutting components of the lawn mower's cutting unit.

[0028] Therefore, a lawn mower is provided that allows for the replacement of the cutting components of the lawn mower's cutting unit in a faster, simpler, more convenient, and safer manner without significantly increasing the complexity or manufacturing cost of the lawn mower.

[0029] Therefore, a lawn mower is provided that overcomes or at least mitigates some of the problems and disadvantages mentioned above. Thus, the aforementioned objectives are achieved.

[0030] Optionally, the lawn mower body includes at least one structure, wherein the at least one structure, at least one through hole of the anti-slip plate, and a plurality of through holes of the cutting disc are arranged such that when the anti-slip plate and the cutting unit are in corresponding predetermined relative rotational positions relative to the lawn mower body, when viewed in a direction parallel to the axis of rotation, at least a portion of the at least one through hole of the anti-slip plate and at least a portion of one of the plurality of through holes of the cutting disc overlap with the at least one structure.

[0031] Therefore, the process of replacing multiple cutting components of the cutting unit is further simplified. This is because each of the anti-slip plate and the cutting unit can be rotated and locked relative to the lawn mower body simply by inserting an elongated object into at least one through hole of the anti-slip plate, one of the multiple through holes of the cutting disc, and the structure of the lawn mower body.

[0032] By rotating and locking the anti-slip plate and cutting unit relative to the lawn mower body, the risk of users being cut by the cutting component during replacement is further reduced. Furthermore, the process of replacing the cutting component can be performed in a faster, simpler, and more convenient manner.

[0033] Optionally, at least one structure is arranged at a first radial distance from the axis of rotation. Therefore, it is convenient to insert an elongated object into at least one through-hole of the anti-slip plate, one of the multiple through-holes of the cutting disc, or the structure of the lawn mower body. This is because such an elongated object can be inserted in an insertion direction parallel to the axis of rotation of the anti-slip plate and the cutting unit. Furthermore, a more secure and reliable rotational locking between the anti-slip plate, the cutting disc, and the lawn mower body can be ensured.

[0034] Optionally, at least one structure includes one or more of a hole, an opening, a recess, and a protrusion. This ensures a more secure and reliable rotary lock between the anti-slip plate, the cutting disc, and the lawnmower body.

[0035] Optionally, the lawn mower body includes at least one mark for indicating that the anti-slip plate and the cutting unit are in corresponding predetermined relative rotational positions relative to the lawn mower body. This further facilitates the process of inserting an elongated object into at least one through-hole of the anti-slip plate, one of the multiple through-holes of the cutting disc, and the structure of the lawn mower body. This is because, before inserting the elongated object, the user can use at least one mark on the lawn mower body to orient the anti-slip plate and the cutting disc to the corresponding predetermined relative rotational positions relative to the lawn mower body.

[0036] Alternatively, the lawn mower is a self-propelled robotic lawn mower. Therefore, a self-propelled robotic lawn mower is provided that greatly facilitates the process of replacing multiple cutting components of the cutting unit of the self-propelled robotic lawn mower.

[0037] Therefore, a self-propelled robotic lawn mower is provided that allows for faster, simpler, more convenient, and safer replacement of the cutting unit's cutting components without significantly increasing the complexity or manufacturing cost of the self-propelled robotic lawn mower.

[0038] Other features and advantages of the invention will become apparent when examined in conjunction with the appended claims and the following detailed description. Attached Figure Description

[0039] Various aspects of the invention, including its specific features and advantages, will be readily understood from the exemplary embodiments discussed in the following detailed description and accompanying drawings, in which:

[0040] Figure 1A lawn mower according to some embodiments of the present disclosure is schematically shown.

[0041] Figure 2 It shows that according to Figure 1 The lower perspective view of the lawn mower of the embodiment shown.

[0042] Figure 3 It shows Figure 2 A cross-section of a portion of the lawnmower shown, and

[0043] Figure 4 The cutting assembly according to the illustrated embodiment is shown when viewed in a direction coinciding with the rotation axis of the cutting unit. Detailed Implementation

[0044] Various aspects of the invention will now be described more fully. Throughout the specification, the same reference numerals denote the same elements. For the sake of brevity and / or clarity, well-known functions or constructions will not be described in detail.

[0045] Figure 1 A lawn mower 2 according to some embodiments of the present disclosure is schematically illustrated. According to the illustrated embodiments, the lawn mower 2 is a self-propelled autonomous robotic lawn mower 2, capable of autonomously navigating and cutting grass in an area without user intervention or control. For the sake of brevity and / or clarity, the self-propelled autonomous robotic lawn mower 2 is referred to herein in some places as "robotic lawn mower 2" or simply "lawn mower 2".

[0046] According to other embodiments, the lawn mower 2 can be other types of lawn mowers, such as push mowers or push mowers. According to the embodiments described herein, the lawn mower 2 is a small or medium-sized lawn mower 2 configured for cutting grass in areas used for aesthetic and recreational purposes, such as gardens, parks, city parks, sports fields, lawns around houses, apartments, commercial buildings, offices, etc.

[0047] The lawn mower 2 includes a lawn mower body 2' and a plurality of lawn mower support members 41, 41', each lawn mower support member being configured to abut against a ground surface 8 in a first plane P1 during operation of the lawn mower 2 to support the lawn mower body 2'. The lawn mower body 2', as mentioned herein, may also be referred to as the lawn mower chassis. Therefore, when the lawn mower 2 is located on a flat ground surface 11, the first plane P1 extends along the ground surface 11.

[0048] According to the illustrated embodiment, the lawnmower support members 41, 41' are the wheels 41, 41' of the lawnmower 2. According to the illustrated embodiment, the lawnmower 2 includes four wheels 41, 41', namely two drive wheels 41 and two support wheels 41'. Each drive wheel 41 of the lawnmower 2 can be powered by an electric motor of the lawnmower 2 to provide prime mover power and / or steer the lawnmower.

[0049] exist Figure 1 The image shows the longitudinal direction ld of the lawn mower 2. The longitudinal direction ld of the lawn mower 2 extends in the longitudinal plane LP of the lawn mower 2. The longitudinal plane LP is parallel to the first plane P1. Therefore, when the lawn mower 2 is located on a flat ground surface 11, the longitudinal direction ld of the lawn mower 2 is parallel to the first plane P1 and thus also parallel to the ground surface 11. Furthermore, the longitudinal direction ld of the lawn mower 2 is parallel to the forward direction fd of the lawn mower 2 and parallel to the reverse direction rd of the lawn mower 2.

[0050] According to the illustrated embodiment, the drive wheel 41 of the lawn mower 2 is a non-steering wheel with a fixed rolling direction relative to the lawn mower body 2'. The corresponding rolling direction of the drive wheel 41 of the lawn mower 2 is substantially parallel to the longitudinal direction ld of the lawn mower 2. According to the illustrated embodiment, the support wheel 41' is a non-driving wheel. Furthermore, according to the illustrated embodiment, the support wheel 41' can pivot about a corresponding pivot axis, such that the rolling direction of the corresponding support wheel 41' can follow the travel direction of the lawn mower 2.

[0051] As can be understood from the above, when the drive wheels 41 and 41' of the lawn mower 2 rotate at the same speed in the forward direction without wheel slippage, the lawn mower 2 will move along... Figure 1 The lawnmower 2 moves forward in the direction fd shown. Similarly, when the drive wheels 41 and 41' of the lawnmower 2 rotate at the same speed in opposite directions without wheel slippage, the lawnmower 2 will move along... Figure 1 The movement is in the opposite direction, rd, as shown. The opposite direction, rd, is opposite to the forward direction, fd.

[0052] According to the illustrated embodiment, the lawn mower 2 can be referred to as a four-wheel rear-wheel drive lawn mower 2. According to other embodiments, the lawn mower 2 can be provided with other numbers of wheels 41, 41', such as three wheels. Furthermore, according to other embodiments, the lawn mower 2 can be provided with other configurations of drive wheels and non-drive wheels, such as front-wheel drive or all-wheel drive.

[0053] According to the illustrated embodiment, the lawnmower 2 includes a control device 98. The control device 98 can be configured to control the propulsion and steering of the lawnmower 2 by controlling an electric motor that drives the drive wheel 41 of the lawnmower 2. According to other embodiments, the control device 98 can be configured to steer the lawnmower 2 by controlling the angle of its steering wheel. According to yet another embodiment, the robotic lawnmower can be an articulated robotic lawnmower, wherein the control device 98 can be configured to steer the robotic lawnmower by controlling the angle between the frame portions of the articulated robotic lawnmower.

[0054] The control device 98 can be configured to control the propulsion of the lawn mower 2 and to steer the lawn mower 2 for navigation within the area to be operated. The lawn mower 2 may also include one or more sensors configured to sense the magnetic field of the wire and / or one or more positioning units, and / or one or more sensors configured to detect impending or ongoing collision events with objects. Furthermore, the lawn mower 2 may include a communication unit connected to the control device 98.

[0055] The communication unit can be configured to communicate with a remote communication unit to receive instructions from it and / or send information to it. This communication can be performed wirelessly via a wireless connection such as the Internet or a wireless local area network (WLAN), or wirelessly via a connection that exchanges data over short distances using short wavelengths (i.e., ultra-high frequency (UHF) radio waves) in the Industrial, Scientific and Medical (ISM) band from 2.4 GHz to 2.486 GHz.

[0056] The control device 98 can be configured to use inputs from one or more of the sensors and / or units described above to control the propulsion and steering of the lawn mower 2, so as to navigate the lawn mower 2 in a systematic and / or random pattern, thereby ensuring complete coverage of the area. Furthermore, the lawn mower 2 may include one or more batteries configured to power the various components of the lawn mower 2. As an example, the one or more batteries may be configured to power the electric motor of the lawn mower 2 in an amount controlled by the control device 98.

[0057] The lawn mower 2 includes a lawn mower cutting device 1. For simplicity and clarity, the lawn mower cutting device 1 is referred to as "cutting device 1" in some places herein. The lawn mower cutting device 1 includes a cutting unit 3' configured to rotate about a rotation axis Ax via a drive shaft 20 of the lawn mower 2 to cut vegetation such as grass. According to the illustrated embodiment, the cutting unit 3' includes a cutting disc and a plurality of cutting members 30 pivotally arranged at the periphery of the cutting disc. The cutting unit 3' is configured to rotate about the rotation axis Ax in a cutting plane PC. The rotation axis Ax is perpendicular to the cutting plane PC. According to the illustrated embodiment, the cutting plane PC is substantially parallel to a first plane P1. According to some embodiments herein, the angle between the cutting plane PC and the first plane P1 may be less than 10 degrees or less than 7 degrees.

[0058] The lawn mower 2 also includes a motor 45 configured to rotate the cutting unit 3' by rotating the drive shaft 20. The motor 45 and the cutting assembly 1 can be collectively referred to as a cutting device. According to the illustrated embodiment, the motor 45 is an electric motor 45. However, according to other embodiments, the lawn mower 2 may include other types of motors, such as internal combustion engines. According to the illustrated embodiment, the drive shaft 20 is the output shaft of the motor 45. However, according to other embodiments, the lawn mower 2 may include a transmission mechanism located between the output shaft of the motor 45 and the drive shaft 20 as mentioned herein.

[0059] like Figure 1 As shown, the cutting device 1 includes a skid plate 5. When the lawn mower 2 is located... Figure 1 In the upright operating position shown, the anti-slip plate 5 is positioned below the cutting unit 3'. In other words, when the lawn mower 2 is in the upright position... Figure 1 In the upright use position shown on the ground surface 11, the anti-slip plate 5 is located between the cutting unit 3' and the ground surface 11.

[0060] According to the illustrated embodiment, the anti-slip plate 5 is disc-shaped, arranged parallel to the cutting unit 3', and its diameter is slightly smaller than the diameter of the cutting disc 3' of the cutting unit 3'. According to other embodiments, the diameter of the anti-slip plate 5 may be approximately the same as the diameter of the cutting disc 3' of the cutting unit 3'. Figure 1 As seen in the diagram, compared to the anti-slip plate 5, the cutting member 30 of the cutting unit 3' extends further from the rotation axis Ax. In this way, the cutting member 30 can cut vegetation efficiently while the cutting unit 3' rotates.

[0061] Figure 2 It shows that according to Figure 1 The lawnmower 2 of the embodiment shown is viewed from the lower perspective. Figure 2In the image, the cutting device 1, including the anti-slip plate 5 and the cutting unit 3', can be seen more clearly.

[0062] The anti-slip plate 5 can be attached relative to the cutting unit 3', allowing it to rotate freely about the rotation axis Ax relative to the cutting unit 3'. In other words, the anti-slip plate 5 is arranged so that it can rotate independently of the cutting unit 3' about the rotation axis Ax. Therefore, the anti-slip plate 5 can reduce frictional losses that occur when the cutting unit 3' engages with the vegetation being cut. In this way, the anti-slip plate 5 can reduce the energy required to cut the vegetation. Furthermore, the anti-slip plate 5 can prevent damage to the cutting unit 3' caused by collisions between the cutting unit 3' and harder objects.

[0063] Figure 3 It shows Figure 2 A cross-section of a portion of the lawnmower 2 shown. Figure 3 In this section, the cross-section is cut through a portion of the cutting assembly 1 and a portion of the lawn mower body 2'. Furthermore, in Figure 3 The image shows the cutting disc 3 of the cutting unit 3'. As explained above, the cutting unit 3' includes the cutting disc 3 and a plurality of cutting components arranged around the periphery of the cutting disc 3.

[0064] like Figure 3 As shown, the anti-slip plate 5 includes at least one through hole 6. This at least one through hole 6 is arranged at a first radial distance r1 from the rotation axis Ax. Furthermore, the cutting disc 3 includes a plurality of unobstructed through holes 4, each of which is arranged such that when the anti-slip plate 5 is in a predetermined relative rotational position relative to the cutting disc 3, when viewed in a direction dA parallel to the rotation axis Ax, at least a portion of at least one of the plurality of through holes 4 of the anti-slip plate 5 overlaps with at least a portion of one of the plurality of through holes 4 of the cutting disc 3.

[0065] exist Figure 3 The diagram shows a single through-hole 4 in the cutting disc 3. However, according to the illustrated embodiment, the cutting disc includes three through-holes 4, as shown in the reference below. Figure 4 As explained. Figure 2 and Figure 3 In the middle, the anti-slip plate 5 is in a predetermined relative rotational position relative to the cutting disc 3.

[0066] Due to these features, the elongated object 18 can be inserted into at least one through-hole 6 of the anti-slip plate 5 and one of the multiple through-holes 4 of the cutting disc 3 to rotate and lock the anti-slip plate 5 relative to the cutting unit 3'. This greatly facilitates the process of replacing the cutting components of the cutting unit 3', as further explained below. Figure 3 As seen in the image, the anti-slip plate includes an opening 13' for receiving tools.

[0067] Figure 4 The cutting assembly 1 according to the illustrated embodiment is shown when viewed in a direction coinciding with the rotation axis Ax of the cutting unit 3'. In other words, in Figure 4 In the middle, the cutting unit 3' is parallel to Figure 2 and Figure 3 This is observed along the direction dA of the rotation axis Ax of the cutting unit 3' shown. Furthermore, in... Figure 4 In the middle, it is shown that according to Figures 1 to 3 Part of the lawn mower body 2' of the lawn mower 2 of the embodiment shown.

[0068] As in Figure 4 As best seen in the illustrated embodiment, the cutting unit 3' comprises three cutting members 30, 30', 30''. According to other embodiments, the cutting unit 3' may include other numbers (such as one to six) of cutting members 30, 30', 30''. According to the illustrated embodiment, each cutting member 30, 30', 30'' is pivotally arranged at the periphery of the cutting disc 3.

[0069] Furthermore, each of the plurality of cutting components 30, 30', 30'' is attached to the cutting disc 3 by fasteners 11, 11', 11'' in the form of screws. According to some other embodiments, each of the plurality of cutting components 30, 30', 30'' can be attached to the cutting disc 3 by other types of fasteners (such as bolts).

[0070] According to the embodiments described herein, the number of orifices 13, 13', 13'' included in the anti-slip plate 5 is the same as the number of cutting members 30, 30', 30'', and the number of orifices 13, 13', 13'' included in the anti-slip plate is the same as the number of fasteners 11, 11', 11''. This is because, according to the illustrated embodiment, each cutting member 30, 30', 30'' is attached to the cutting disc 3 via a fastener 11, 11', 11''.

[0071] Unless otherwise specified, the following will also refer to Figures 1 to 4 Each orifice 13, 13', 13'' is arranged such that, when viewed in the direction dA parallel to the rotation axis Ax, each orifice overlaps with a fastener 11, 11', 11'' when the anti-slip plate 5 is in a predetermined relative rotational position relative to the cutting unit 3'. This greatly facilitates the process of replacing the cutting components 30, 30', 30'' of the cutting unit 3'. This is because when the anti-slip plate 5 is in a predetermined relative rotational position relative to the cutting unit 3' and passes through... Figure 2 and Figure 3When the elongated object 18 shown is rotated and locked onto the cutting disc 3, the user can insert tools such as screwdrivers or power tools into the multiple holes 13, 13', 13'' of the anti-slip plate 5 to reach and loosen the fasteners 11, 11', 11''.

[0072] According to the embodiments described herein, each of the plurality of openings 13, 13', 13'' of the anti-slip plate 5 is spaced apart from at least one through hole 6 of the anti-slip plate 5. Similarly, according to the embodiments described herein, at least one through hole 6 of the anti-slip plate 5 is spaced apart from the plurality of openings 13, 13', 13'' of the anti-slip plate 5.

[0073] As in Figure 3 As best seen in the diagram, the lawn mower body 2' includes a structure 8. The lawn mower body 2' may include at least one structure 8 according to an embodiment described herein. According to the illustrated embodiment, at least one structure 8, at least one through-hole 6 of the anti-slip plate 5, and a plurality of through-holes 4, 4', 4'' of the cutting disc 3 are arranged such that when the anti-slip plate 5 and the cutting unit 3' are in their respective predetermined relative rotational positions relative to the lawn mower body 2', viewed in a direction dA parallel to the rotation axis Ax, at least a portion of at least one of the through-holes 6 of the anti-slip plate 5 and at least a portion of one of the plurality of through-holes 4, 4', 4'' of the cutting disc 3 overlap with at least one structure 8. Figures 2 to 4 In the middle, the anti-slip plate 5 and the cutting unit 3' are in corresponding predetermined relative rotational positions relative to the lawn mower body 2'.

[0074] According to the illustrated embodiment, structure 8 includes a hole disposed in the lawnmower body 2'. According to other embodiments, structure 8 may include other types of structures for engaging with an elongated object 18, such as orifices, recesses, and / or protrusions.

[0075] Furthermore, according to the illustrated embodiment, structure 8 is arranged at a first radial distance r1 from the rotation axis Ax. Similarly, the through hole 4 of the cutting disc 3 is arranged at a first radial distance r1 from the rotation axis Ax. In other words, according to the illustrated embodiment, the through hole 6 of the anti-slip plate 5, the through hole 4 of the cutting disc 3, and the hole of structure 8 are arranged at the same radial distance r1 from the rotation axis Ax. Therefore, an elongated object 18 can be inserted into the through hole 6 of the anti-slip plate 5, the through hole 4 of the cutting disc 3, and the hole of structure 8 to rotatably lock the anti-slip plate 5 and the cutting unit 3' to the lawnmower body 2' of the lawnmower 2. In other words, according to the illustrated embodiment, at least one through hole 6 of the anti-slip plate 5 and a plurality of through holes 4, 4', 4'' of the cutting disc 3 are configured such that an elongated object 18 can be inserted into at least one through hole 6 of the anti-slip plate 5 and one through hole 4, 4', 4'' of the cutting disc 3 in a direction dA parallel to the rotation axis Ax to rotatably lock the anti-slip plate 5 to the cutting disc 3. This greatly simplifies the process of replacing the cutting components 30, 30', and 30'' of the cutting unit 3'.

[0076] like Figure 4 As shown, according to the illustrated embodiment, the cutting disc 3 includes three equidistant through holes 4, 4', and 4''. Figure 4 In the middle, two through holes 4', 4'' are hidden behind the anti-slip plate 5 and are therefore indicated by dashed lines. According to some other embodiments, the cutting disc 3 may include other numbers of equally spaced through holes 4, 4', 4'', such as 2 to 20 or 2 to 6 equally spaced through holes 4, 4', 4''.

[0077] The characteristic of equidistantly spaced through holes 4, 4', 4'' is that these through holes are all arranged at the same radial distance r1 from the rotation axis Ax, and each through hole 4, 4', 4'' has the same circumferential distance from two adjacent through holes 4, 4', 4''. In an embodiment where the cutting disk 3 includes only two through holes, the characteristic of equidistantly spaced through holes is that these two through holes are arranged at the same radial distance r1 from the rotation axis Ax, and these through holes are arranged along a straight line intersecting the rotation axis Ax. As can be understood from the following, according to the illustrated embodiment, each of the plurality of through holes 4, 4', 4'' of the cutting disk 3 is arranged at a first radial distance r1 from the rotation axis Ax.

[0078] In other words, each through hole 4, 4', 4'' is arranged such that when the anti-slip plate 5 is in a predetermined relative rotational position relative to the cutting disc 3, when viewed in the direction dA parallel to the rotation axis Ax, at least a portion of at least one through hole 6 of the anti-slip plate 5 overlaps with at least a portion of one of the plurality of through holes 4, 4', 4'' of the cutting disc 3. In this way, the anti-slip plate 5 can be rotatably locked to the cutting unit 3' at a plurality of predetermined relative rotational positions relative to the cutting disc 3, thereby further facilitating the process of changing the cutting components 30, 30', 30'' of the cutting disc 3 while maintaining the rotational balance of the cutting disc 3.

[0079] Since the cutting disc 3 according to the illustrated embodiment includes three equidistant through holes 4, 4', 4'', the cutting unit 3' can be rotatably locked to the anti-slip plate 5 at three different predetermined relative rotational positions relative to the cutting disc 3. Because the through holes 4, 4', 4'' of the cutting disc 3 are equidistantly spaced, when viewed in the direction dA parallel to the rotation axis Ax, each hole 13, 13', 13'' overlaps with a fastener 11, 11', 11'' in each predetermined relative rotational position relative to the cutting disc 3.

[0080] like Figure 4 As shown, the cutting disc 3 includes three markings m2, m2', and m2'', each marking indicating the rotational position of a through hole 4, 4', and 4'' of the cutting disc 3. Therefore, when the cutting disc 3 and the anti-slip plate 5 are oriented such that one of the markings m2, m2', and m2'' is radially located outside the through hole 6 of the anti-slip plate 5, at least a portion of the through hole 6 of the anti-slip plate 5 will overlap with at least a portion of the through holes 4, 4', and 4'' of the cutting disc 3.

[0081] Therefore, the marks m2, m2', and m2'' can be used to indicate that the anti-slip plate 5 is in a predetermined relative rotational position relative to the cutting unit 3'. The number of marks m2, m2', and m2'' included in the cutting disc 3 can be the same as the number of through holes 4, 4', and 4'' of the cutting disc 3, wherein each of the multiple marks m2, m2', and m2'' indicates the rotational position of one through hole 4, 4', and 4'' of the cutting disc 3.

[0082] According to the illustrated embodiment, the anti-slip plate 5 includes a through hole 6 for rotatably locking the anti-slip plate 5 to the cutting unit 3'. However, according to other embodiments, the anti-slip plate 5 may include other numbers (such as two to eight) of through holes 6 for rotatably locking the anti-slip plate 5 to the cutting unit 3'.

[0083] As in Figure 4As seen in the illustration, the anti-slip plate 5 according to the shown embodiment includes a mark m1 for indicating the rotational position of the through hole 6 of the anti-slip plate 5. The number of marks m1 included in the anti-slip plate 5 may be the same as the number of through holes 6 of the anti-slip plate 5, wherein each of the plurality of marks m1 indicates the rotational position of one through hole 6 of the anti-slip plate 5. Therefore, the mark m1 can be used to indicate that the anti-slip plate 5 is in a predetermined relative rotational position relative to the cutting unit 3'. As can be understood from the above, when the mark m1 of the anti-slip plate 5 is aligned with a mark m2, m2', m2'' of the cutting disc 3, the anti-slip plate 5 is in a predetermined relative rotational position relative to the cutting unit 3'.

[0084] Furthermore, according to the illustrated embodiment, the lawn mower body 2' includes a mark m3 for indicating that the anti-slip plate 5 and the cutting unit 3' are in corresponding predetermined relative rotational positions with respect to the lawn mower body 2'. According to the illustrated embodiment, the mark m3 on the lawn mower body 2' indicates the position of the structure 8 of the lawn mower body 2'.

[0085] Therefore, due to the markings m1, m2, m2', m2'', and m3, the user can orient (i.e., rotate) the anti-slip plate 5 and the cutting disc 3 such that a marking m2, m2', m2'' on the cutting disc 3 and a marking m1 on the anti-slip plate 5 are aligned with a marking m3 on the lawn mower body 2'. Thus, the anti-slip plate 5 and the cutting unit 3' are quickly and easily positioned at their respective predetermined relative rotational positions relative to the lawn mower body 2'. The user can then insert an elongated object 18 into the through-hole 6 of the anti-slip plate 5, the through-hole 4 of the cutting disc 3, and the hole in the structure 8 to rotatably lock the anti-slip plate 5 and the cutting unit 3' to the lawn mower body 2'.

[0086] Each of the markings m1, m2, m2', m2'', and m3 can be provided by painting or coating a portion of the anti-slip plate 5, the cutting disc 3, and / or the lawn mower body 2'. Alternatively or as a supplement, each of the markings m1, m2, m2', m2'', and m3 can be provided by a user-visible recess, protrusion, groove, or other type of structure on the surface of the anti-slip plate 5, the cutting disc 3, and / or the lawn mower body 2'.

[0087] As in Figure 3As best seen in the diagram, the diameter D6 of the through hole 6 of the anti-slip plate 5 substantially corresponds to the diameter D4 of the through hole 4 of the cutting disc 3. The through holes 4, 4', and 4'' of the cutting disc 3 have the same diameter D4. Therefore, according to the illustrated embodiment, the diameter D6 of at least one through hole 6 of the anti-slip plate 5 substantially corresponds to the diameter D4 of each of the plurality of through holes 4, 4', and 4'' of the cutting disc 3. Similarly, according to the illustrated embodiment, the diameter D8 of the hole in the structure 8 substantially corresponds to the diameter D4 of the through holes 4, 4', and 4'' of the cutting disc 3.

[0088] In this way, an elongated object 18 with a diameter slightly smaller than the diameters D4, D6, and D8 can be quickly and easily inserted into the through-hole 6 of the anti-slip plate 5, the through-hole 4 of the cutting disc 3, and the hole of the structure 8. According to the illustrated embodiment, the elongated object 18 is a rod-shaped object, which can be provided together with the cutting assembly 1 according to the embodiments herein. However, other types of elongated objects (such as a thin screwdriver) can also be used to rotate and lock the anti-slip plate 5 and the cutting unit 3' to the lawnmower body 2' of the lawnmower 2.

[0089] The hole in the structure 8 of the lawn mower body 2' can be slightly tapered to hold the elongated object 18 in place when a portion of the elongated object 18 is inserted into the hole of the structure 8.

[0090] According to the illustrated embodiment, the diameter of each of the plurality of orifices 13, 13', 13'' is larger than the diameter of at least one through hole 6 of the anti-slip plate 5 and larger than the diameter of the plurality of through holes 4, 4', 4'' of the cutting disc 3. According to some embodiments, the diameter of each of the plurality of orifices 13, 13', 13'' may be at least 10% or at least 25% larger than the diameter of at least one through hole 6 of the anti-slip plate 5 and the diameter of the plurality of through holes 4, 4', 4'' of the cutting disc 3. In this way, it can be ensured that when the anti-slip plate 5 is rotated and locked to the cutting disc 3 at a predetermined relative rotational position relative to the cutting unit 3', the user can easily and conveniently insert tools (such as screwdrivers or power tools) into the plurality of orifices 13, 13', 13'' of the anti-slip plate 5 to reach and loosen the fasteners 11, 11', 11''.

[0091] According to some embodiments, each through hole in at least one through hole 6 of the anti-slip plate 5 and each through hole in a plurality of through holes 4, 4', 4'' of the cutting disc 3 may have a diameter D4, D6 greater than 2 mm or greater than 3 mm.

[0092] Furthermore, according to the illustrated embodiment, the first radial distance r1 is approximately 92% of the radius r of the anti-slip plate 5. According to other embodiments, the first radial distance r1 may be at least 50% or at least 70% of the radius r of the anti-slip plate 5. Therefore, when the elongated object 18 is inserted into at least one through hole 6 of the anti-slip plate 5 and one of the plurality of through holes 4, 4', 4'' of the cutting disc 3, a secure and reliable rotational lock between the anti-slip plate 5 and the cutting disc 3 can be ensured.

[0093] According to the illustrated embodiment, the radius r of the anti-slip plate 5 is approximately 10 cm. According to other embodiments, the radius r of the anti-slip plate 5 can be from 5 cm to 25 cm, or it can be between 7 cm and 15 cm.

[0094] The phrase “basically parallel to” as used in this article can cover angles between the objects mentioned that are less than 10 degrees or less than 7 degrees.

[0095] The phrase “basically corresponds” as used in this article can cover the fact that the deviation between the aspects, objects, distances, or measurements mentioned is less than 10%.

[0096] According to the illustrated embodiment, each of the plurality of through holes 4, 4', 4'' of the cutting disc 3 is unobstructed. The characteristic that each of the plurality of through holes 4, 4', 4'' of the cutting disc 3 is unobstructed means that the through holes 4, 4', 4'' are free, open, and unobstructed, and no other object is attached to or connected to the through holes 4, 4', 4''. In other words, the characteristic that each of the plurality of through holes 4, 4', 4'' of the cutting disc 3 is unobstructed means that the through holes 4, 4', 4'' allow an elongated object 18 to be freely inserted into and passed through the through holes 4, 4', 4'' without removing any part, object, or component attached to or connected to the through holes 4, 4', 4'' of the cutting disc 3.

[0097] Therefore, throughout this disclosure, the term "through-hole 4, 4', 4''" can be replaced by the terms "unobstructed through-hole 4, 4', 4''", "free through-hole 4, 4', 4''", or "open through-hole 4, 4', 4''". Similarly, the term "multiple through-holes 4, 4', 4''" can be replaced by the terms "multiple unobstructed through-holes 4, 4', 4''", "multiple free through-holes 4, 4', 4''", or "multiple open through-holes 4, 4', 4''".

[0098] Similarly, according to the illustrated embodiment, at least one through-hole 6 of the anti-slip plate 5 is unobstructed, meaning that at least one through-hole 6 of the anti-slip plate 5 is free, open, and unobstructed, and no other object is attached to or connected to at least one through-hole 6. In other words, the characteristic that at least one through-hole 6 of the anti-slip plate 5 is unobstructed is that at least one through-hole 6 allows an elongated object 18 to be freely inserted into and passed through the through-hole 6 without removing any part, object, or component attached to or connected to at least one through-hole 6 of the anti-slip plate 5.

[0099] Therefore, throughout this disclosure, the phrase "at least one through hole 6" can be replaced by the phrases "at least one unobstructed through hole 6", "at least one free through hole 6", or "at least one open through hole 6".

[0100] It should be understood that the foregoing has described various exemplary embodiments, and the invention is defined only by the appended independent claims. Those skilled in the art will recognize that modifications can be made to the exemplary embodiments without departing from the scope of the invention as defined by the appended independent claims, and different features of the exemplary embodiments can be combined to form embodiments other than those described herein.

[0101] As used herein, the terms “comprising” or “including” are open-ended and include one or more of the stated features, elements, steps, components, or functions, but do not exclude the presence or addition of one or more other features, elements, steps, components, functions, or groups thereof.

Claims

1. A lawn mower cutting device (1) comprising a cutting unit (3') configured to rotate about a rotation axis (Ax) to cut grass, the cutting unit (3') comprising a cutting disc (3) and a plurality of cutting components (30, 30', 30'') arranged at the periphery of the cutting disc (3). in, The cutting device (1) includes a slip plate (5) that can be attached relative to the cutting unit (3'), allowing the slip plate (5) to rotate freely about the rotation axis (Ax) relative to the cutting unit (3'). The anti-slip plate (5) includes at least one through hole (6), which is located at a first radial distance (r1) from the axis of rotation (Ax). The cutting disc (3) includes a plurality of unobstructed through holes (4, 4', 4''), each of which is arranged such that when the anti-slip plate (5) is in a predetermined relative rotational position relative to the cutting disc (3), when viewed in a direction (dA) parallel to the axis of rotation (Ax), at least a portion of at least one through hole (6) of the anti-slip plate (5) overlaps with at least a portion of one of the plurality of through holes (4, 4', 4'') of the cutting disc (3), such that an elongated object (18) can be inserted into the at least one through hole (6) of the anti-slip plate (5) and one through hole (4, 4', 4'') of the cutting disc (3) to rotatably lock the anti-slip plate (5) to the cutting disc (3).

2. The cutting device (1) according to claim 1, wherein, The first radial distance (r1) is at least 50% of the radius (r) of the anti-slip plate (5).

3. The cutting device (1) according to claim 1, wherein, Each of the plurality of through holes (4, 4', 4'') of the cutting disc (3) is arranged at the first radial distance (r1) from the axis of rotation (Ax).

4. The cutting device (1) according to claim 1, wherein, The diameter (D6) of the at least one through hole (6) of the anti-slip plate (5) is substantially corresponding to the diameter (D4) of each of the plurality of through holes (4, 4', 4'') of the cutting disc (3).

5. The cutting device (1) according to any one of claims 1 to 4, wherein, Each of the at least one through hole (6) of the anti-slip plate (5) and each of the plurality of through holes (4, 4', 4'') of the cutting disc (3) has a diameter (D4, D6) greater than 2 mm.

6. The cutting device (1) according to any one of claims 1 to 4, wherein, The cutting disc (3) includes two to six equidistant through holes (4, 4', 4'').

7. The cutting device (1) according to any one of claims 1 to 4, wherein, Each of the plurality of cutting components (30, 30', 30'') is pivotally arranged at the periphery of the cutting disc (3).

8. The cutting device (1) according to any one of claims 1 to 4, wherein, Each of the plurality of cutting components (30, 30', 30'') is attached to the cutting disc (3) by fasteners (11, 11', 11''), and wherein the anti-slip plate (5) includes a plurality of orifices (13, 13', 13''), each orifice being arranged such that when the anti-slip plate (5) is in the predetermined relative rotational position relative to the cutting unit (3'), each orifice overlaps with a fastener (11, 11', 11'') when viewed in a direction (dA) parallel to the axis of rotation (Ax).

9. The cutting device (1) according to claim 8, wherein, The number of orifices (13, 13', 13'') included in the anti-slip plate (5) is the same as the number of cutting components (30, 30', 30'').

10. The cutting device (1) according to any one of claims 1 to 4, wherein, The cutting disc (3) includes at least one mark (m2, m2', m2'') to indicate that the anti-slip plate (5) is in the predetermined relative rotational position relative to the cutting unit (3').

11. The cutting device (1) according to claim 6, wherein, The cutting disc includes three equally spaced through holes (4, 4', 4'').

12. A lawn mower (2) comprising a lawn mower body (2') and a motor (45), said motor being configured to rotate said cutting unit (3') about said axis of rotation (Ax), and wherein, The lawn mower (2) includes a lawn mower cutting device (1) according to any one of claims 1 to 11.

13. The lawn mower (2) according to claim 12, wherein, The lawn mower body (2') includes at least one structure (8), wherein the at least one structure (8), the at least one through hole (6) of the anti-slip plate (5), and the plurality of through holes (4, 4', 4'') of the cutting disc (3) are arranged such that when the anti-slip plate (5) and the cutting unit (3') are in their respective predetermined relative rotational positions relative to the lawn mower body (2'), when viewed in a direction (dA) parallel to the axis of rotation (Ax), at least a portion of the at least one through hole (6) of the anti-slip plate (5) and at least a portion of one of the plurality of through holes (4, 4', 4'') of the cutting disc (3) overlap with the at least one structure (8).

14. The lawn mower (2) according to claim 13, wherein, The at least one structure (8) is arranged at the first radial distance (r1) from the axis of rotation (Ax).

15. The lawn mower (2) according to claim 13, wherein, The at least one structure (8) includes one or more of a hole, an opening, a recess, and a protrusion.

16. The lawn mower (2) according to any one of claims 12 to 15, wherein, The lawn mower body (2') includes at least one mark (m3) to indicate that the anti-slip plate (5) and the cutting unit (3') are in corresponding predetermined relative rotational positions relative to the lawn mower body (2').

17. The lawn mower (2) according to any one of claims 12 to 15, wherein, The lawn mower (2) is a self-propelled robotic lawn mower (2).

Images