Lawn mower

Abstract

The application provides a mower, which comprises a chassis, a motor for driving a blade assembly to rotate, and a blade quick-change system, wherein the blade quick-change system comprises a blade holding assembly and a blade adjusting assembly, and the blade adjusting assembly is used for driving the blade holding assembly to switch between an open position and a closed position, so as to lock or release the blade assembly. The blade quick-change system is arranged on the mower, so that the operation of replacing the blade assembly by a user is greatly facilitated.

Description

Technical Field

[0001] This embodiment relates to a lawnmower. Background Technology

[0002] A lawnmower is a mechanical tool used to trim lawns, vegetation, etc. It is also known as a lawn mower, lawn trimmer, or lawn mower.

[0003] Lawn mowers come in several types, including push-back lawnmowers, ride-on lawnmowers, and robotic lawnmowers, which are not yet widely available on the market. When the lawnmower's blade assembly wears out or becomes damaged, or when the actual working conditions or requirements of the lawnmower change, the blade assembly often needs to be replaced. For example, when collecting fallen leaves in the fall, the operator needs to replace it with a blade assembly that provides better grass collection. Currently, common blade replacement methods on the market require the use of additional wrench attachments and fixing tools, and the operator also needs to apply sufficient torque to the attachment wrench, which can be inconvenient for the operator. Summary of the Invention

[0004] The purpose of this embodiment is to provide a lawnmower in which the blade assembly of the lawnmower can be easily and quickly replaced.

[0005] To achieve the above objectives, the following technical solution is adopted: A lawnmower includes: a blade assembly that performs cutting operations by rotation, the blade assembly rotating about a blade axis; a motor that drives the blade assembly to rotate; a chassis that forms a first receiving space, the blade assembly being located within the first receiving space formed by the chassis when it rotates; the lawnmower includes a blade quick-change system, the blade quick-change system including a blade holding assembly that secures or releases the blade assembly, the blade holding assembly being at least partially located within the first receiving space of the chassis; the blade holding assembly includes a first rotating member that rotates about a first axis that is substantially perpendicular to the blade axis, the rotation of the first rotating member enabling the blade holding assembly to switch between a locked state and a released state; the blade quick-change system further includes a blade adjusting assembly that drives the blade holding assembly to secure or release the blade assembly.

[0006] In some embodiments, the lawnmower includes a second rotating component, and both the first and second rotating components rotate about a first axis.

[0007] In some embodiments, the lawnmower includes an operating component for driving the blades to maintain the component's movement.

[0008] In some embodiments, the lawnmower includes a drive assembly, an operating assembly that drives the drive assembly to move, and when the drive assembly is in a first position, the blade retaining assembly is in an open position; when the drive assembly is in a second position, the blade retaining assembly is in a closed position.

[0009] In some embodiments, the operating component includes an operating element that can be triggered by an operator.

[0010] In some embodiments, when the blade assembly is locked to the blade retaining assembly, the operating member is positioned above the blade assembly.

[0011] In some embodiments, the operating element is positioned above the motor.

[0012] In some embodiments, the lawnmower includes an upper housing located above the chassis, with operating components disposed within the upper housing.

[0013] In some embodiments, the lawnmower also includes a battery pack, the upper housing including a battery compartment cover for receiving the battery pack, and the operating element located within a second receiving space formed by the battery compartment cover.

[0014] In some embodiments, the operating element is located within a first receiving space formed by the chassis.

[0015] In some embodiments, the actuator is configured to adjust the blade retaining assembly by pressing down or pulling up.

[0016] The following technical solution is also provided: a lawnmower, comprising: a motor for driving a blade assembly to rotate; a chassis forming a first receiving space, wherein the blade assembly is located within the first receiving space formed by the chassis when rotating; the lawnmower includes a blade quick-change system, the blade quick-change system including a blade holding assembly, the blade holding assembly including an open position and a closed position, wherein when the blade assembly is mounted on the lawnmower, the blade holding assembly is located in the open position; when the blade holding assembly is adjusted from the open position to the closed position, the blade assembly disengages from the lawnmower; the blade quick-change system further includes a blade adjustment assembly, the blade adjustment assembly including an operating component and a transmission component, the operating component driving the transmission component to switch between a first position and a second position, wherein when the transmission component is driven to the first position by the operating component, the blade holding assembly is driven to the open position by the transmission component; when the transmission component is driven to the second position by the operating component, the blade holding assembly is driven to the closed position by the transmission component.

[0017] In some embodiments, the operating component includes an operating element that can be triggered by an operator and is positioned above the motor.

[0018] In some embodiments, the operating component includes an operating element that can be directly operated and is disposed within a first receiving space formed by the chassis.

[0019] In some embodiments, the blade retaining assembly includes a first rotating member that rotates about a first axis, the rotation of the first rotating member enabling the blade retaining assembly to switch between a locked state and a released state.

[0020] In some embodiments, the blade holding assembly further includes a second rotating member, both of which rotate about a first axis.

[0021] In some embodiments, the transmission assembly includes a first transmission rod, one end of which is driven by an operating assembly, and the other end of which drives a blade holding assembly.

[0022] The beneficial technical effects of these embodiments are as follows: a lawnmower is provided that allows the operator to remove the blade assembly without additional accessories and tools, simply by operating one control component. The blade assembly can also be installed without additional accessories, which is convenient, quick, and easy to operate, greatly optimizing the user's experience in replacing the blade assembly. Attached Figure Description

[0023] Figure 1 It's a 3D image of a lawnmower;

[0024] Figure 2 This is a 3D view of the lawnmower after the battery compartment cover has been removed;

[0025] Figure 3 It is Figure 1 A three-dimensional view of a lawnmower viewed from below;

[0026] Figure 4 Figure 1 A 3D view of the quick-change blade system of a lawnmower and the assembly of adjacent structures.

[0027] Figure 5 yes Figure 1 A 3D view of the motor, blade change system, and blade assembly of a lawnmower;

[0028] Figure 6 yes Figure 5 A cross-sectional view of the motor, operating components, and blade retaining components assembled together;

[0029] Figure 7 yes Figure 6 A cross-sectional view of the transmission assembly in the first position and the blade holding assembly in the open position;

[0030] Figure 8 yes Figure 6 A cross-sectional view of the transmission assembly in the second position and the blade holding assembly in the closed position;

[0031] Figure 9 yes Figure 8 A perspective view of the blade retaining assembly in the closed position;

[0032] Figure 10 yes Figure 7A perspective view of the blade retaining assembly in the open position;

[0033] Figure 11 yes Figure 9 and Figure 10 An exploded view of the blade-holding assembly disassembled in the image;

[0034] Figure 12 yes Figure 7 A three-dimensional view of the rotating component in the image;

[0035] Figure 13 yes Figure 12 Exploded view of the rotating component;

[0036] Figure 14 yes Figure 13 A perspective view of the second rotating component;

[0037] Figure 15 yes Figure 13 A perspective view of the first rotating component in the process;

[0038] Figure 16 yes Figure 15 A magnified plan view of the first track of the first rotating component in the middle;

[0039] Figure 17 yes Figure 16 A front view of the first track in the middle;

[0040] Figure 18 This is a plan view of the rotating component in the closed position as in the first embodiment;

[0041] Figure 19 This is a plan view of the rotating component in the closed position as the second embodiment;

[0042] Figure 20 This is a plan view of the rotating component in the closed position as the third embodiment;

[0043] Figure 21 yes Figure 5 When the blade assembly is removed, the blade retains the bottom perspective view of the assembly;

[0044] Figure 22 yes Figure 21 A three-dimensional view of the base plate connected to the hollow main shaft;

[0045] Figure 23 yes Figure 22 A cross-sectional view of the locating pins on the midsole plate;

[0046] Figure 24 yes Figure 23 A magnified view of the locating pin in the middle;

[0047] Figure 25 yes Figure 5 A perspective view of the first embodiment of the mounting port of the blade assembly in the image;

[0048] Figure 26 yes Figure 25 A 3D view of the mounting port in the middle;

[0049] Figure 27 yes Figure 26 A front view of the mounting port in the middle;

[0050] Figure 28 yes Figure 5 A perspective view of a second embodiment of the mounting port for the blade assembly;

[0051] Figure 29 yes Figure 28 A 3D view of the mounting port in the middle;

[0052] Figure 30 yes Figure 29 A front view of the mounting port in the middle;

[0053] Figure 31 yes Figure 5 A perspective view of a second embodiment of the operating components in the diagram;

[0054] Figure 32 yes Figure 31 A stereoscopic view of the operating components from another perspective;

[0055] Figure 33 This is a schematic diagram of another implementation of the blade quick-change system;

[0056] Figure 34 This is a schematic diagram of another implementation of the blade quick-change system. Detailed Implementation

[0057] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved in this embodiment clearer, the technical solutions of this embodiment will be described in detail in some embodiments below with reference to the accompanying drawings. The described embodiments are only some embodiments of this embodiment, and not all embodiments.

[0058] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this embodiment. In addition, the terms "first," "second," etc., are only used to distinguish different structures or components, and should not be construed as indicating or implying relative importance.

[0059] The lawnmower involved in this embodiment can be a rear-walking lawnmower with a push handle, a rideable lawnmower, or a lawnmower robot that can be remotely operated to move on its own. The following description uses a pushable rear-walking lawnmower as an example.

[0060] like Figures 1 to 3 As shown, the lawnmower 10 includes a walking assembly 100, a telescopic rod assembly 150, a handle assembly 200, an upper housing 300, and a chassis 310. The walking assembly 100 includes a front wheel 110 and a rear wheel 120. One end of the telescopic rod assembly 150 is connected to the upper housing 300 at the rear wheel 120, and the other end is connected to the handle assembly 200 for the user to grip. The telescopic rod assembly 150 can extend or retract and can rotate about a pivot axis located at one end on the upper housing 300. The upper housing 300, together with the chassis 310, houses a motor 350 for driving the blade assembly 400, a battery pack 321, and a transmission structure for driving the walking assembly 100. When the blade assembly 400 rotates, it is located within a first receiving space 311 formed by the chassis 310.

[0061] like Figures 3 to 5 As shown, a blade retaining assembly 600 is provided at one end of the motor 350. In some embodiments, the blade retaining assembly 600 is at least partially located within a first receiving space 311 formed by the chassis 310. The blade retaining assembly 600 connects the blade assembly 400 to the lower end of the motor 350, and the blade assembly 400 rotates under the drive of the motor 350. In this embodiment, the motor 350 is an external rotor motor, and the rotor of the external rotor motor rotates along the motor axis 351. Figure 4 In this configuration, the second limiting shell 340 is used to secure the motor 350 at least, and the first limiting shell 330 is used to secure other components inside the lawnmower 10. In some embodiments, for a lawnmower 10 with a battery pack, the upper housing 300 includes a battery compartment shell 320, and the first limiting shell 330 and the battery compartment cover 320 together form a second receiving space 322, which can accommodate the battery pack.

[0062] It is understandable that lawnmowers can be various types, including push-mounted rear-walking lawnmowers, ride-on lawnmowers, or robotic lawnmowers. Regardless of the type, all lawnmowers have a blade assembly 400 to perform the cutting operation. Some lawnmower blade assemblies 400 consist of only one blade connected to the motor 350, housed within a chassis 310, and can be referred to as a "single blade-single chassis" system. Other lawnmower blade assemblies 400 include two partially overlapping blades, both connected to the motor 350 and rotating together within a chassis 310, and can be referred to as a "double blade-single chassis" system. Still other lawnmower blade assemblies 400 include two independent blades, each located in a separate connected chassis 310, and can also be referred to as a "double blade-double chassis" system; this type is common in larger ride-on lawnmowers. This embodiment uses... Figure 5 The blade assembly 400, which is formed by the partial overlap of the first blade 410 and the second blade 420, moves synchronously in the same chassis 310 as an example for detailed explanation. However, other types of blade assemblies 400 described above can also be used in this embodiment.

[0063] like Figure 5 As shown, the blade quick-change system 500 is used to install or release the blade assembly 400. When the blade assembly 400 is locked to the blade quick-change system 500 by operating the blade quick-change system 500, the blade assembly 400 is in an operable state that can be driven to rotate by the motor 350. When the blade assembly 400 is unlocked from the blade quick-change system 500 by operating the blade quick-change system, the blade assembly 400 is disengaged from the blade quick-change system 500, and the blade assembly 400 cannot be driven to rotate by the motor 350, thereby putting the lawnmower 10 into an inoperable state.

[0064] In some embodiments, the blade quick-change system 500 includes an operation component 510 and a transmission component 550, which will be described in detail below. Figure 5 The location indicated by the dashed box is the approximate location of the transmission assembly 550, which is substantially located inside the motor 350 and extends along the motor axis 351 of the motor 350. The blade assembly 400 includes a mounting port 430 through which the blade holding assembly 600 passes when it needs to secure or release the blade assembly 400. The blade assembly 400 rotates about the blade axis 401, which in this embodiment substantially coincides with the motor axis 351.

[0065] according to Figure 1The directional diagram indicates that the blade holding assembly 600 is basically located at the lower end and outside of the motor 350, the transmission assembly 550 is basically located inside the motor 350 and extends along the motor axis, and the operating assembly 510 is basically located at the upper end and outside of the motor 350. The operating assembly 510 and the transmission assembly 550 together constitute the blade quick-change system 500. When the operator operates the operating assembly 510, the position or state of the transmission assembly 550 located inside the motor 350 changes, thereby changing the position or state of the blade holding assembly 600, so that the blade assembly 400 can be removed or installed.

[0066] Figures 6 to 8 This further reveals the specific implementation method of the blade quick-change system 500. For example... Figure 6 As shown, the operating component 510 includes an operating element 520, a first operating lever 530, and a second operating lever 540. The operating element 520 is operated by the operator, who can operate it by pressing, pulling, flicking, rotating, etc., to drive the transmission component 550 to move. The operating element 520 can be the end of the first operating lever 530 or an additional part, both for operator operation. In this embodiment, the operating element 520 moves in the vertical direction; therefore, in this embodiment, the operator can pull up or press down the operating element 520. The first elastic element 525 is used to allow the operating element 520 to reset itself after being pressed down. In practical applications, the first elastic element 525 may be omitted, allowing the operating element 520 to be directly connected to the first operating lever 530. There is no significant technical difference between the two implementations with and without the first elastic element 525, but the operator's feel when pressing will be somewhat different.

[0067] The operating element 520 can be directly operated. In some embodiments, the operating element 520 is positioned above the location of the blade assembly 400 when it is locked with the blade retaining assembly 600. In some embodiments, the operating element 520 is positioned above the motor 350. In other embodiments, the operating element 520 is located in the second receiving space 322 formed by the battery compartment cover 320 (see...). Figure 2 Inside. In other words, the operator can open the battery compartment cover 320 to replace the battery pack 321 or adjust the blade quick-change system 500.

[0068] like Figure 6As shown, the motor 350 has a hollow spindle 360 ​​inserted into the motor 350 along the motor axis 351. The transmission assembly 550 is housed inside the hollow spindle 360. In this embodiment, the lower part of the hollow spindle 360 ​​is connected to the blade holding assembly 600, which is partially located inside the hollow spindle 360. A first bearing 365 and a second bearing 375 are located outside the hollow spindle 360 ​​to support its rotation. Sealing rings may also be provided on the outside of the first bearing 365 and the second bearing 375 to achieve a sealing effect.

[0069] Figures 7 to 11 The specific impact of a change in the position of the operating component 510 on the transmission component 550 and the blade holding component 600 is revealed, along with the specific implementation method. Figure 7 and Figure 8 These are cross-sectional views of the blade retaining assembly 600 in the open and closed positions, respectively. Figure 10 and Figure 9 These are three-dimensional schematic diagrams showing the blade retaining assembly 600 in the open and closed positions, respectively. Figure 11 for Figure 7 An exploded view of the components.

[0070] Figure 7 This is a schematic diagram of the transmission assembly 550 in the first position, at which time the blade holding assembly 600 is in the open position; Figure 8 This is a schematic diagram of the transmission assembly 550 in the second position, at which time the blade holding assembly 600 is in the closed position. In this embodiment, the second position is lower than the first position. The operating assembly 510 drives the transmission assembly 550 to switch between the first and second positions. When the transmission assembly 550 is driven to the first position by the operating assembly 510, the blade holding assembly 600 is driven to the open position by the transmission assembly 550; when the transmission assembly 550 is driven to the second position by the operating assembly 510, the blade holding assembly 600 is driven to the closed position by the transmission assembly 550.

[0071] In some embodiments, the transmission assembly 550 includes a first transmission rod 560 and a second transmission rod 570. A second operating lever 540 of the operating assembly 510 drives the first transmission rod 560 of the transmission assembly 550 downwards, thereby adjusting the blade holding assembly 600. In some embodiments, the blade holding assembly 600 includes a rotating assembly 630, which includes a first rotating member 610 and a second rotating member 620. The movement of the first transmission rod 560 drives the movement of the second pin 650, which in turn drives the rotating assembly 630 to rotate about the central axis of the first pin 640, i.e., the first axis 601, causing the blade holding assembly 600 to be in an open or closed position. In this embodiment, the first axis 601 is substantially perpendicular to the blade axis 401. In other embodiments, the blade holding assembly 600 includes only the first rotating member 610, which rotates about the first axis 601. In other words, the second rotating member 620 can be a non-rotatable part, and only the rotatable first rotating member 610 is sufficient to position the blade holding assembly 600 in an open or closed position.

[0072] Alternatively, the rotation of the first rotating member 610 enables the blade retaining assembly 600 to switch between a locked state and a released state. When the blade assembly 400 is installed onto the blade retaining assembly 600 and the blade retaining assembly 600 is in the open position, the blade retaining assembly 600 is in the locked state. The blade retaining assembly 600 in the locked state can rotate under the drive of the motor 350. To remove the blade assembly 400, first ensure that the motor 350 is stopped and the blade 400 is stationary, then adjust the blade retaining assembly 600 to the closed position to detach the blade assembly 400 from the blade retaining assembly 600. At this point, the blade retaining assembly 600 is in the released state. When the blade retaining assembly 600 is in the released state, it is in the closed position.

[0073] like Figure 11As shown, the first transmission rod 560 includes a first upper end 561 and a first lower end 562, and the second transmission rod 570 includes a second upper end 571 and a second lower end 572. The first upper end 561 of the first transmission rod 560 contacts the first cam surface 541 of the second operating rod 540. The second upper end 571 of the second transmission rod 570 enters into the first lower end 562 of the first transmission rod 560, and the outer periphery of the second upper end 571 surrounds the second elastic member 565. The third elastic member 575 surrounds the outside of the first lower end 562 of the first transmission rod 560, and one end of the third elastic member 575 abuts against the third upper end 661 of the swing ear receiving shell 660, and the other end abuts against the outer circumference 563 of the first transmission rod 560. One end of the second elastic member 565 abuts against the upper surface of the second lower end 572 of the second transmission rod 570, and the other end abuts against the internal opening of the first lower end 562 of the first transmission rod 560. In this embodiment, both the second elastic element 565 and the third elastic element 575 are springs.

[0074] Now back Figure 6 When the operator presses down on the operating component 520, and the pressing force reaches the first force F1 that triggers the first operating lever 530 to move downward, the first operating lever 530 moves downward, and the first connecting shaft 535 moves downward with the first operating lever 530. Since the position of the second connecting shaft 545 is fixed within the first limiting shell 330 (see...), Figure 4 Therefore, the first operating lever 530 drives the second operating lever 540 to rotate around the central axis of the second connecting shaft 545. When the operator continuously applies a downward pressure greater than or equal to F1 to press the operating member 520 downward, the rotation of the first cam surface 541 drives the first transmission rod 560 to move downward. The downward movement of the first transmission rod 560 causes the second pin 650 to move along the track of the rotating assembly 630. At the same time, during the downward movement, the operator also needs to overcome the elastic force generated by the second elastic member 565 and the third elastic member 575.

[0075] In other words, when the blade holding assembly 600 is located Figure 6 When the blade is in the open position as shown, the operator presses down on the operating element 520 to move the blade retaining assembly 600 from... Figure 7 The opening position shown has been adjusted to Figure 8 The closed position is shown, and during this process, both the second elastic element 575 and the third elastic element 565 are compressed. Referring to Figure 13, the upper part of the first rotating element 610a is an arc-shaped second cam surface 614, and the upper part of the second rotating element 620a is an arc-shaped third cam surface 624. In this embodiment, the second cam surface 614 and the third cam surface 624 are in contact with the second lower end 572 of the second transmission rod 570. Figure 8In this configuration, the third elastic element 565 applies a downward elastic force to the blade holding assembly 600. Due to the cam shape of the second cam surface 614 and the third cam surface 624, the rotating assembly 630 is not easily separated when the second transmission rod 570 presses against it. This avoids an excessively large gap between the first rotating element 610 and the second rotating element 620, which could cause the blade assembly 400 to jam during release and thus fail. It also prevents the mounting opening 430 from being unable to pass through the lower end of the rotating assembly 630 during the installation of the blade assembly 400, thus preventing assembly failure.

[0076] Figures 12 to 17 The specific structure of the rotating assembly 630a in the first embodiment of the rotating assembly 630 is further revealed, wherein, Figure 12 This is a schematic diagram of the rotating assembly 630a. Figure 13 This is an exploded view of the disassembled rotating assembly 630a. Figures 14 to 17 The first rotating member 610a and the second rotating member 620a, as well as their specific structures, are further shown from different perspectives.

[0077] like Figure 12 and Figure 13 As shown, the rotating assembly 630a includes a first rotating member 610a and a second rotating member 620a. A first pin 640 extends along a first axis 601, and a second pin 650 extends along a second axis 602. The second pin 650 is also inserted into two openings 5621 at the first lower end 562 of the first transmission rod 560. The first pin 640 enters the first hole 611 of the first rotating member 610a and the second hole 621 of the second rotating member 620a. The first rotating member 610a includes a first slot 615, and the second rotating member 620a includes a second slot 625. When the blade assembly 400 is fixed to the blade retaining assembly 600, the space formed by the first slot 615 and the second slot 625 is used to place the blade assembly 400.

[0078] In some embodiments, such as Figure 14 and Figure 15As shown, the first rotating member 610a has a first track 616, and the second rotating member 620a has a second track 626. The second pin 650 slides within the partially overlapping first track 616 and second track 626. Both ends of the first track 616 and the second track 626 include a highest position and a lowest position. Specifically, the first track 616 has a first upper stop 612 at the highest position and a first lower stop 613 at the lowest position, and the second track 626 has a second upper stop 622 at the highest position and a second lower stop 623 at the lowest position. When the second pin 650 passes through both the first upper stop 612 and the second upper stop 622 simultaneously, the blade retaining assembly 600 is in the open position; when the second pin 650 passes through both the first lower stop 613 and the second lower stop 623 simultaneously, the blade retaining assembly 600 is in the closed position.

[0079] like Figure 16 and Figure 17 As shown, in some embodiments, the first upper stop 612 has an arc-shaped first arc surface 6121, connected to the first arc surface 6121 by a first transition surface 6122 and a second transition surface 6123 that are substantially along the vertical direction. The first arc surface 6121, the first transition surface 6122, and the second transition surface 6123 together form the first upper stop 612. The second upper stop 622 may have the same features as the first upper stop 612, which will not be described in detail here.

[0080] The upper part of the first lower stop 613 has a horizontal surface 6131, combined with Figure 8 and Figure 18 When the blade retaining assembly 600 is in the closed position (see...) Figure 8 The horizontal surface 6131 is basically in a horizontal position. The horizontal surface 6131 and the second arc surface 6132 of the first lower stop 613 provide a movable range when the second pin 650 moves to the lower position of the track. That is, when the second pin 650 is in the range of contact with the inclined surface 6131 and the second arc surface 6132, the rotating assembly 630a is basically in a closed position, allowing a small gap between the first rotating member 610a and the second rotating member 620a. This small gap will not affect whether the blade assembly 400 can pass smoothly through the lower end of the rotating assembly 630a when it is removed or installed.

[0081] When the lawnmower 10 is performing a cutting operation, sometimes the cut grass clippings may become stuck between the blade assembly 400 and the chassis 310. This phenomenon is called stalling. When the lawnmower 10 stalls, the blade assembly 400 may bend, thereby generating a tilting force F5 (see...). Figure 14This could potentially cause the blade assembly 400 to accidentally fall off during operation. Therefore, the design of the first upper stop 612 and the second upper stop 622 described above makes the upper stop a groove that is basically vertical. The overturning force F5 caused by the bending of the blade assembly 400 cannot cause the second pin 650 to move, thereby ensuring that the blade assembly 400 does not fall off accidentally.

[0082] When the operator needs to adjust the blade retaining assembly 600 from the closed position to the open position, a second force F2 is required to trigger the first rotating member 610a, providing an external force to rotate the rotating assembly 630. That is, the direction of the second force F2 acting on the first rotating member 610a must not point towards the second axis 602 of the second pin 650, so that the first rotating member 610a can overcome the resistance of the cross surface 6131 and rotate. However, the upper part of the second lower stop 623 does not have a cross surface 6131; applying an external force only to the lower end of the second rotating member 620a will not change the state of the blade retaining assembly 600.

[0083] It is important to emphasize that in this embodiment, the operator only needs to trigger one rotating component of the rotating assembly 630, including the transverse surface 6131, and the provided force is sufficient to move the blade holding assembly 600 from... Figure 9 Adjust the closed position as shown Figure 10 The open position shown locks the blade assembly 400 in place. In this embodiment, if only the second rotating member 620a is triggered without triggering the first rotating member 610a, the rotating assembly 630a cannot rotate. This is because the horizontal surface 6131 of the first rotating member 610a is always in a horizontal position, thus limiting the second pin 650 and preventing it from moving vertically. For easy operator identification, a special mark can be made on the small surface of the first rotating member 610a.

[0084] When installing the blade assembly 400, first place the blade assembly 400 in the position defined by the first slot 615 and the second slot 625, then apply a second force F2 to the rotating member with the transverse surface in the rotating assembly 630 to keep the blade holding assembly 600 from Figure 8 Adjust the closed position as shown Figure 7 The opening position is shown. During this process, in addition to the second force F2 driving the first transmission rod 560 upward, the third elastic element 575 also provides an upward force, pushing the first transmission rod 560 upward, ultimately causing the first cam surface on the second operating lever 540 to return to its original position after being subjected to an upward force. Figure 7 The location and status are shown. In Figure 7In this state, the presence of the third elastic element 575 prevents the second operating lever 540 from rotating downwards without human intervention due to factors such as gravity, thus preventing the rotating assembly 630 from being accidentally closed. At the same time, the elastic force applied downwards by the second elastic element 565 to the second cam surface 614 and the third cam surface 624 enhances the above effect, ensuring that the ear assembly 630 remains in the open position, further preventing the blade assembly 400 from accidentally falling off during operation.

[0085] Figure 19 This is a schematic diagram of a second embodiment of the rotating assembly 630b. Unlike the rotating assembly 630a, both the first rotating member 610a and the second rotating member 620b in the rotating assembly 630b include a horizontal surface 6131. ​​Therefore, the operator needs to provide two triggering forces to the first rotating member 610a and the second rotating member 620b, namely a third force F3 and a fourth force F4. Triggering only one of the first rotating member 610a and the second rotating member 620b will not be enough to adjust the rotating assembly 630b from the closed position to the open position. The operator can provide the triggering force by hand, applying force to the lower ends of the first rotating member 610a and the second rotating member 620b, or by placing the blade assembly 400 within the range defined by the first slot 615 and the second slot 625, applying an upward force to the rotating assembly 630b through the blade assembly 400, thereby triggering the rotation of the first rotating member 610a and the second rotating member 620b.

[0086] Figure 20 This is a schematic diagram of a third embodiment of the rotating assembly 630c. Unlike the rotating assembly 630a, the fourth swing lug 610b and the second rotating member 620b in the rotating assembly 630c do not include the cross surface 6131. ​​Therefore, the operator does not need to provide any triggering force to the two swing lugs, but instead operates the operating component 510 to adjust the rotating assembly 630c from the closed position to the open position. In this embodiment, Figure 6 Pulling up the operating component 520 will lock the blade assembly 400.

[0087] Figures 21 to 30 The specific method of positioning and cooperating between the blade assembly 400 and the blade retaining assembly 600 is further revealed.

[0088] like Figures 21 to 24 As shown, and in combination Figure 6The blade assembly 400 is mounted on the base plate 370, which is fixed to the hollow spindle 360, defining the position of the blade holding assembly 600. In this embodiment, the base plate 370 is fixed to the hollow spindle 360 ​​by screws 371. The base plate 370 includes a locating pin 372 for defining the position of the blade assembly 400, allowing the mounting opening 430 of the blade assembly 400 to pass smoothly through the blade holding assembly 600, and preventing it from wobbling on the cutting plane. Figure 24 As shown, in this embodiment, the positioning pin 372 is configured as a frustum shape that gradually increases in size from one end to the other, with a chamfered edge. The first distance L1 is the diameter of the lower end of the positioning pin 372, and the second distance L2 is the diameter of the upper end of the positioning pin 372. The first distance L1 is smaller than the second distance L2, and the four positioning pins 372 work together to achieve the positioning function. The advantage of this design is that the smaller diameter of the lower end makes it easier for the blade assembly 400 to be installed onto the base plate 370 from bottom to top, while the larger diameter of the upper end ensures that the blade assembly 400 is not easily loosened after it is properly fitted to the base plate 370.

[0089] Figures 25 to 32 The disclosed mounting port 430a is a first embodiment of the mounting port 430 of the blade assembly 400. Since this embodiment is specifically described using a blade assembly 400 composed of a first blade 410 and a second blade 420 as an example, the mounting port 430 of the blade assembly 400 forms different first mounting ports 440a and second mounting ports 450a in the first blade 410 and the second blade 420, respectively. Figure 25 As shown, the first blade 410 and the second blade 420 are fixed together by two sets of bolts and nuts to form a blade assembly 400. The blade assembly 400 has a positioning hole 460 that passes through the first blade 410 and the second blade 420. The positioning pin 372 of the chassis 370 passes into the positioning hole 460 to achieve the positioning of the blade assembly 400.

[0090] The first mounting port 440a defines the maximum area through which the lower end of the rotating assembly 630 can pass. The first mounting port 440a is configured to allow the rotating assembly 630 to pass smoothly, at least in the closed position, and at least not in the open position. Figure 26 and Figure 27As shown, the first mounting port 440a includes two arc-shaped first arc surfaces 441 and a first elongated groove 442 that is narrower than the arc-shaped area. The two ends of the first elongated groove 442 are second arc surfaces 443. In this embodiment, the shape of the second mounting port 450a is such that when the rotating assembly 630 is in the open position, it "sits" on the area where the second mounting port 450a and the first mounting port 440a do not overlap. The advantage of this design is that it shortens the thickness of the first slot 615 and the second slot 625 along the motor axis 351, which means it shortens the length of the rotating assembly 630 along the motor axis 351. Therefore, when the blade assembly 400 includes only one first blade 410, without any other additional blades that rotate coaxially with it, only one first mounting port 440a is needed for assembly. Similarly, if the designer designs the second mounting port 450a of the two blades to be the same shape as the first mounting port 440a, when installing the blade assembly 400, it is only equivalent to increasing the thickness of the blade assembly 400, and there is no substantial difference from a technical point of view.

[0091] Figures 28 to 30 The disclosed mounting port 430b is a second embodiment of the mounting port 430 of the blade assembly 400. The mounting port 430b of the blade assembly 400 forms different first mounting ports 440b and second mounting ports 450b on the first blade 410 and the second blade 420, respectively. In this embodiment, the first mounting port 440b is a circular opening, and the second mounting port 450b is essentially a square in its front view, with rounded corners. The periphery of the second mounting port 450b covers the position of the positioning hole 460. This design also ensures that when the rotating assembly 630 is in the open position, it "sits" on the area where the second mounting port 450b and the third first mounting port 440b do not overlap, and shortens the length of the rotating assembly 630 along the motor axis 351. However, the difference is that when positioning is performed by the positioning pins 372 of the base plate 370, the larger space of the second mounting port 450b makes it easier for each positioning hole 460 to be inserted into each positioning pin 372. However, the disadvantage is that the area of ​​the blade assembly 400 located near the second mounting port 450b needs to be locally reinforced to prevent breakage.

[0092] Figure 31 and Figure 32 In another embodiment of this invention, the operating component 510b passes through an opening in the lower motor housing 355 of the motor 350, and one end of the operating component 510b is connected to the operating member 520b. Figure 4 to Figure 6 The disclosed implementation differs in that the operating component 520b is exposed within the first receiving space 311 of the visible chassis 310, allowing the lawnmower 10 to be moved from the blade assembly 400 when needed. Figure 1The position shown is flipped up and down, at which point the operator 520b can be clearly seen by the operator, who can adjust the blade holding assembly 600 by pulling the operator 520b.

[0093] Specifically, in this embodiment, the blade holding assembly 600 is switched between an open and closed position by pulling down the operating element 520b. The unlocking method of the operating element 520b is not set to upward pressure to prevent objects with a certain mass, such as stones, from falling into the chassis 310 of the lawnmower 10 as the blade assembly 400 rotates, accidentally triggering the operating element 520b, and causing the blade assembly 400 to fly out unexpectedly. However, if in… Figure 32 The lower part of the operating element 520b shown is provided with an additional cover to prevent accidental activation, so the operating element 520b can be configured with more diverse operating modes.

[0094] As three implementation methods, when Figure 31 The operating components 510b shown are respectively paired with Figures 18 to 10 When the rotating assembly 630a, rotating assembly 630b, or rotating assembly 630c shown is in use, the operator pulls down the operating member 520b to move the transmission assembly from... Figure 7 The first position shown is adjusted to Figure 8 The second position shown adjusts the blade holding assembly 600 from the open position to the closed position. However, when using the rotating assembly 630a, a second force F2 needs to be applied to the first rotating member 610a to adjust the blade holding assembly 600 from the closed position to the open position; when using the rotating assembly 630b, the first rotating member 610a and the second rotating member 620b need to be triggered simultaneously to adjust the blade holding assembly 600 from the closed position to the open position; when using the rotating assembly 630c, it is not necessary to trigger either lug; simply releasing the operating member 520b will cause the operating member 520b to spring back automatically, thereby locking the blade assembly 400.

[0095] Figure 33 and Figure 34 Two other implementation methods of this embodiment are disclosed in the form of schematic diagrams, which can be applied to a "dual-blade" system with two sets of blade assemblies 400. Specifically, the two sets of blade assemblies 400 rotate around two different central axes and are housed together in a single chassis 310, or are housed in two connected chassis 310s respectively. In this case, either operating component 510c or operating component 510d can simultaneously drive both sets of blade holding assemblies 600 to change position. The operator only needs to operate one operating component to simultaneously install and remove both sets of blade assemblies 400. Specifically, for these two implementation methods, the operating component can be located within the upper housing 300 or chassis 310 of the lawnmower 10, or in other easily accessible locations.

[0096] Generally, when the operating element 520 is located above the blade assembly 400, or in some embodiments above the motor, or even inside the upper housing 300, the operating element 520 can be covered by a cover. The operator opens the cover first and then operates the operating element 520. The operating element 520 can also be exposed outside the upper housing 300 of the lawnmower 10. In this case, it is not suitable to set the unlocking action of the blade assembly 400 to a pressing method to prevent accidental ejection of the blade assembly 400 due to accidental pressing. The exposed operating element 520 needs to be unlocked by twisting, flicking, etc., for greater safety. If the implementation method of the blade quick-change system 500 disclosed in this embodiment—that the operating element 510 drives the transmission component 550, and thus the blade holding component 600—is not changed, but only the operating method of the operating element 520 is changed, it also falls within the protection scope of this embodiment.

[0097] The advantage of this embodiment is that when the blade assembly 400 of the lawnmower 10 needs to be installed or removed, the quick-change blade system 500 provided in this embodiment enables the release of the blade assembly 400 using only one operating element 520, and also provides several different implementation methods. Regarding how the blade assembly 400 is reinstalled into the lawnmower 10 after release, this embodiment also provides several different operating methods: automatic springback of the operating element position or manual restoration, or application of additional restoring force to the rotating component 630. Designers can apply these methods to actual products according to different market demands.

[0098] The operating component 520 disclosed in this embodiment is located above the blade assembly 400. In some embodiments, it can be located inside the upper housing 300, and in other embodiments, it can be located inside the battery compartment cover 320. This allows the operating component 520 to be operated without the lawnmower being tipped over, enabling the blade assembly 400 to fall automatically. This greatly satisfies the operator's needs in different scenarios when changing the blade assembly 400. This embodiment is particularly significant for large lawnmowers with a large body and heavy weight, greatly reducing the time and effort required for the operator to disassemble and assemble the blades, and achieving disassembly and assembly without the need for additional tools and accessories.

[0099] In addition, the detailed design of the blade holding assembly 600 disclosed in this embodiment also achieves the technical effect of preventing the blade assembly 400 from stalling, which has significant market application value.

[0100] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0101] The foregoing has shown and described the basic principles, main features, and advantages of this embodiment. Those skilled in the art should understand that the above embodiments do not limit this embodiment in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this embodiment.

Claims

1. A mower comprising: a blade assembly to perform a cutting operation by rotation, the blade assembly rotating about a blade axis; a motor to drive the blade assembly to rotate; a chassis forming a first receiving space in which the blade assembly is located when the blade assembly rotates; characterized in that: the mower comprises a blade quick change system, the blade quick change system comprising: a blade holding assembly to secure or release the blade assembly, the blade holding assembly being at least partially located in the first receiving space of the chassis; the blade holding assembly comprising a first rotating member to rotate about a first axis, the first axis being substantially perpendicular to the blade axis, the rotation of the first rotating member effecting a change of the blade holding assembly between a locked state and a released state; a blade adjustment assembly to drive the blade holding assembly to secure or release the blade assembly, the blade adjustment assembly comprising an operating member located in a space separate from the first receiving space, the operating member being operated by an operator outside the blade rotating space.

2. The lawnmower as claimed in claim 1, characterized in that: the mower comprises a second rotating member, the first rotating member and the second rotating member both rotating about the first axis.

3. The lawnmower as claimed in claim 1, characterized in that: the mower comprises an operating assembly to drive the blade holding assembly to move.

4. The lawnmower as claimed in claim 3, characterized in that: the mower comprises a transmission assembly, the operating assembly driving the transmission assembly to move, the blade holding assembly being in an open position when the transmission assembly is in a first position, the blade holding assembly being in a closed position when the transmission assembly is in a second position.

5. The lawnmower as claimed in claim 3, characterized in that: the operating assembly comprises an operating member to be actuated by an operator.

6. The lawnmower as claimed in claim 5, characterized in that: the operating member is located above the blade assembly when the blade assembly is locked to the blade holding assembly.

7. The lawnmower as claimed in claim 5, characterized in that: the operating member is located above the motor.

8. The lawnmower as claimed in claim 5, characterized in that: the mower comprises an upper housing located above the chassis, the operating member being located in the upper housing.

9. The lawnmower as claimed in claim 8, characterized in that: the mower further comprises a battery pack, the upper housing comprising a battery compartment cover to receive the battery pack, the operating member being located in a second receiving space formed by the battery compartment cover.

10. The lawnmower as claimed in claim 5, characterized in that: the operating member is configured to adjust the blade holding assembly by a downward or upward actuation.

11. A mower comprising: a motor to drive a blade assembly to rotate; a chassis forming a first receiving space in which the blade assembly is located when the blade assembly rotates; characterized in that: the mower comprises a blade quick change system, the blade quick change system comprising: a blade holding assembly comprising an open position and a closed position, the blade holding assembly being in the open position when the blade assembly is mounted on the mower, the blade assembly being released from the mower when the blade holding assembly is adjusted from the open position to the closed position; The blade adjusting assembly comprises an operating assembly and a transmission assembly, the operating assembly drives the transmission assembly to switch between a first position and a second position, when the transmission assembly is driven by the operating assembly to the first position, the blade holding assembly is driven by the transmission assembly to the open position; when the transmission assembly is driven by the operating assembly to the second position, the blade holding assembly is driven by the transmission assembly to the closed position, the operating assembly comprises an operating member arranged in a space separated from the first accommodating space, the operating member is operated by an operator outside the blade rotating space.

12. The lawnmower as claimed in claim 11, characterized in that: The operating assembly comprises an operating member for an operator to trigger, the operating member is arranged above the motor.

13. The lawn mower of claim 11, wherein: The blade holding assembly comprises a first rotating member, the first rotating member rotates around a first axis, rotation of the first rotating member realizes switching of the blade holding assembly between a locked state and a released state.

14. The lawnmower as claimed in claim 13, characterized in that: The blade holding assembly further comprises a second rotating member, the first rotating member and the second rotating member both rotate around the first axis.

15. The lawnmower as claimed in claim 14, characterized in that: The transmission assembly comprises a first transmission rod, one end of the first transmission rod is driven by the operating assembly, the other end of the first transmission rod drives the blade holding assembly.

Images