Lawn mower

Abstract

The present invention relates to a lawn mower, comprising a base; an upper cover, arranged above the base, forming a main chamber with the base; a motor, located in the main chamber, fixed to the base, and having an output shaft; an adapter sleeve, fixed to the output shaft, the end of the adapter sleeve facing away from the motor being a mating surface; a cutter disc, connected to the mating surface, having a cutting blade, wherein the position of the cutting blade is adjustable in the axial direction of the output shaft. The cutting height can be adjusted by changing the axial position of the cutter disc on the output shaft. The motor can be directly fixed to the base, and no separate chamber is required outside the motor, thereby simplifying the structure. At the same time, since there is no need to provide a raising knob, stud, or other structure, there is no raising knob, stud, or other structure to affect the sealing of the main chamber of the lawn mower, and the sealing of the main chamber is better.

Description

Technical Field

[0001] The present invention relates to the field of power tools, in particular to a lawn mower. Background Art

[0002] When using a lawn mower, you will need to adjust the cutting height. You need to change the height of the blade off the ground to adjust the cutting height.

[0003] In traditional technology, the cutter disc cutting height adjustment generally includes electric height adjustment and manual knob height adjustment. The electric height adjustment method is generally: after the required cutting height is selected on the operating interface of the control panel, the program will issue a command to control the height adjustment motor to the selected cutting height. The manual knob height adjustment method is generally: the user turns the height adjustment knob, the height adjustment knob drives the stud, and then the stud rotates through the thread to adjust the cutter disc cutting height. In specific implementation, the motor is installed in the motor barrel, and then the motor barrel is movably installed to the base. The upper cover is provided above the base, and the upper cover and the base form the main chamber of the lawn mower; the height adjustment knob is provided above the upper cover, that is, it is located above the main chamber of the lawn mower. In the process of implementing traditional technology, the inventor found that the above-mentioned height adjustment method has limitations, namely, the height adjustment system has a complex structure, many parts, a large volume, and high cost. Summary of the Invention

[0004] Based on this, it is necessary to provide a lawn mower with a simple structural design and allowing the cutting height of the cutter disc to be adjusted.

[0005] A lawn mower comprises: a base; an upper cover, arranged above the base, forming a main chamber with the base; a motor, located in the main chamber, fixed to the base and having an output shaft; an adapter sleeve, fixed to the output shaft, the end of the adapter sleeve facing away from the motor being a mating surface; a cutter disc, connected to the mating surface, the cutter disc having a cutting blade, wherein the cutting blade is positionally adjustable in the axial direction of the output shaft.

[0006] The above-mentioned lawn mower adjusts the cutting height by changing the axial position of the cutter disc on the output shaft. The motor can be directly fixed to the base, and no separate chamber is required outside the motor, which simplifies the structure. At the same time, since there is no need to set up structures such as raising knobs and studs, there are no height adjustment knobs, studs and other structures to affect the sealing of the main chamber of the lawn mower, and the sealing of the main chamber is better.

[0007] In one embodiment, the cutter disc and the adapter sleeve have a plurality of mating positions in the circumferential direction around the axis of the output shaft, and at different mating positions, the cutting blade is located at different positions in the axial direction of the output shaft.

[0008] In one embodiment, the matching surface includes a plurality of sub-matching surfaces at different positions in the axial direction of the output shaft, and at different matching positions, different sub-matching surfaces abut against the cutter disc.

[0009] In one embodiment, at different mating positions, different portions of the impeller rest against the mating surface.

[0010] In one embodiment, one of the mating surface and the cutter disc is provided with a mating hole, and the other one is provided with a limiting column.

[0011] In one embodiment, at different mating positions, the limiting post is inserted into the mating hole or abuts against the mating surface.

[0012] In one embodiment, there are multiple matching holes, and the hole diameters or depths of the multiple matching holes are different. At different matching positions, the limiting column matches with different matching holes.

[0013] In one embodiment, there are multiple limiting columns, and the heights of the multiple limiting columns are different. At different matching positions, different limiting columns match with the matching holes.

[0014] In one embodiment, the mating surface is provided with a mating hole, and the mating hole includes a first hole and a second hole with different inner diameters; the cutter disc is configured to selectively cooperate with the adapter sleeve, wherein the cutter disc includes a base, a bearing portion connected to the base, and a cutting blade arranged on the bearing portion, and the base has a first mounting surface for facing the mating surface, and a first limiting column is provided on the first mounting surface, and the size of the first limiting column is configured to be able to be inserted into the second hole but not into the first hole; wherein, when the first limiting column abuts against the mating surface, the cutter disc is in a first position relative to the adapter sleeve, and the cutting blade has a first cutting height; when the first limiting column is inserted into the second hole, the cutter disc is in a second position relative to the adapter sleeve, and the cutting blade has a second cutting height different from the first cutting height.

[0015] In one embodiment, the base also has a second mounting surface arranged back to back with the first mounting surface, and a second limiting column is provided on the second mounting surface, and the size of the second limiting column is configured to be able to be inserted into the second hole but not into the first hole; wherein, when the second limiting column abuts against the matching surface, the cutter disc is in a third position relative to the adapter sleeve, and the cutting blade has a third cutting height; when the second limiting column is inserted into the second hole, the cutter disc is in a fourth position relative to the adapter sleeve, and the cutting blade is at a fourth cutting height, and the fourth cutting height and the third cutting height are different from each other, and different from the first cutting height and the second cutting height.

[0016] In one embodiment, when the cutter disc is in the first position or the second position, the cutting blade faces away from the adapter sleeve; when the cutter disc is in the third position or the fourth position, the cutting blade faces the adapter sleeve.

[0017] In one embodiment, the cutter disc abuts against the mating surface, and an adjustment gasket is provided between the cutter disc and the mating surface.

[0018] In one embodiment, the cutting blade is mounted on the cutter disc in an adjustable manner along the axial direction of the output shaft.

[0019] In one embodiment, the cutter disc is detachably connected to the adapter sleeve.

[0020] In one embodiment, the adapter sleeve is detachably connected to the output shaft or is adjustably arranged along the axial position of the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the partial structure of a lawn mower according to an embodiment of the present invention when it is at a first cutting height.

[0022] Figure 2 for Figure 1 Exploded view of the structure shown.

[0023] Figure 3 Schematic diagram of the mounting surface of the cutter disc when the lawn mower is at a first cutting height.

[0024] Figure 4 A schematic diagram of the arrangement of the matching holes of the adapter sleeve.

[0025] Figure 5 This is a schematic diagram of the partial structure of a lawn mower according to an embodiment of the present invention when it is at a second cutting height.

[0026] Figure 6 for Figure 5 Exploded view of the structure shown.

[0027] Figure 7 Schematic diagram of the mounting surface of the cutter disc when the lawn mower is at the second cutting height.

[0028] Figure 8 This is a schematic diagram of the partial structure of a lawn mower according to an embodiment of the present invention when it is at a third cutting height.

[0029] Figure 9 for Figure 8 Exploded view of the structure shown.

[0030] Figure 10 Schematic diagram of the mounting surface of the cutter disc when the lawn mower is at the third cutting height.

[0031] Figure 11 2 is a schematic diagram of the partial structure of a lawn mower according to an embodiment of the present invention when it is at a fourth cutting height.

[0032] Figure 12 for Figure 11 Exploded view of the structure shown.

[0033] Figure 13 Schematic diagram of the mounting surface of the cutter disc when the lawn mower is at the fourth cutting height.

[0034] Figure 14 Schematic diagram of the partial structure of a lawn mower in another embodiment.

[0035] Figure 15 A schematic cross-sectional view of a lawn mower according to another embodiment.

[0036] Figure 16 for Figure 15 An exploded view of the lawn mower is shown with the travel wheels omitted.

[0037] Figure 17 Schematic diagram of the structure of an adapter sleeve in a lawn mower according to another embodiment.

[0038] Figure 18 FIG. 1 is an exploded view of a lawn mower according to another embodiment of the present invention when the lawn mower is at a first cutting height.

[0039] Figure 19 FIG. 1 is an exploded view of a lawn mower according to another embodiment when the lawn mower is at a second cutting height.

[0040] Figure 20 This is an exploded view of a lawn mower according to another embodiment at a third cutting height. The corresponding numbers of the relevant elements in the figure are as follows:

[0041] 100, lawn mower; 10, cutterhead; 110, base; 111, first mounting surface; 112, first limiting post; 1121, first internal passage; 113, second mounting surface; 114, second limiting post; 1141, second internal passage; 120, bearing portion; 130, cutting blade; 140, first collar; 150, second collar;

[0042] 20. Motor; 210. Output shaft; 30. Adapter sleeve; 310. Matching surface; 311. First sub-matching surface; 312. Second sub-matching surface; 313. Third sub-matching surface; 320. First hole; 330. Second hole; 340. Center hole; 40. Connector; 50. Casing; 510. Base; 520. Top cover; 530. Decorative cover; 60. Travel wheel. DETAILED DESCRIPTION

[0043] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0046] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0047] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0049] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0050] like Figures 1 to 13 As shown, in a lawn mower 100 according to an embodiment of the present invention, the cutting height of the cutting blade 130 on the cutter disc 10 is adjusted by changing the installation position of the cutter disc 10. Figure 1 As shown, the cutting blade 130 has a first cutting height; Figure 5 As shown, the cutting blade 130 has a second cutting height. Figure 8 As shown, the cutting blade 130 can also have a third cutting height. Figure 11As shown, the cutting blade 130 can also have a fourth cutting height. The four different cutting heights mean that the cutting blade 130 is at different heights above the ground when the lawn mower 100 is in operation. Specifically, in this embodiment, the first cutting height is 20 mm, the second cutting height is 30 mm, the third cutting height is 40 mm, and the fourth cutting height is 50 mm. It should be noted that the above values ​​are for example only and are not limited to the specific cutting heights.

[0051] like Figure 1 and Figure 2 As shown, the local structure of the lawn mower 100 when the cutting blade 130 has a first cutting height is illustrated, and only the installation structure of the cutter disc 10 is illustrated, and the housing, running wheels and other components of the lawn mower 100 are omitted.

[0052] The lawn mower 100 includes a cutter disc 10 with a cutting blade 130, a motor 20, and an adapter sleeve 30. The motor 20 has an output shaft 210 for outputting rotational power. The adapter sleeve 30 is fixed to the output shaft 210 and is driven to rotate by the motor 20. The cutter disc 10 is fixedly connected to the adapter sleeve 30. When the motor 20 is working, the output shaft 210 drives the cutter disc 10 to rotate through the adapter sleeve 30, and the cutter disc 10 drives the cutting blade 130 to rotate to form a cutting area. The above-mentioned cutter disc 10, cutting blade 130, motor 20, and adapter sleeve 30 can be collectively referred to as the cutting mechanism of the lawn mower 100, which is usually arranged in the middle position below the housing of the lawn mower 100. In the specific setting, the housing generally includes a base and an upper cover, wherein the motor 20 is fixed to the base, and the upper cover is arranged above the base and the motor 20.

[0053] Combine Figure 1 、 Figure 2 and Figure 4 The end of the adapter sleeve 30 facing away from the motor 20 is a mating surface 310. More specifically, the end of the adapter sleeve 30 facing away from the motor housing of the motor 20 is provided with a mating surface 310, and the mating surface 310 is provided with matching holes. The matching holes include a first hole 320 and a second hole 330 with different inner diameters. In the specific setting, the adapter sleeve 30 has a center hole 340, and the center hole 340 is fixedly matched with the output shaft 210. There are three first holes 320 and three second holes 330, and they are alternately arranged in the circumferential direction around the axis of the center hole 340. The three first holes 320 and the three second holes 330 are evenly distributed in the aforementioned circumferential direction. Of course, the number of the first holes 320 and the second holes 330 is not limited to three.

[0054] Combine Figure 1 、 Figure 2 and Figure 3The cutter head 10 includes a base 110, a supporting portion 120 connected to the base 110, and a cutting blade 130 disposed on the supporting portion 120. The base 110 has a first mounting surface 111 facing the mating surface 310. A first limiting post 112 is provided on the first mounting surface 111. The first limiting post 112 is sized to be inserted into the second hole 330 but not into the first hole 320.

[0055] In this embodiment, the purpose of manually adjusting the cutting height of the cutting blade 130 can be achieved by changing the matching mode between the first limiting column 112 of the cutter disc 10 and the adapter sleeve 30 .

[0056] Specifically, when the cutter head 10 is connected to the adapter sleeve 30, the first mounting surface 111 is opposite to the matching surface 310. Figure 1 and Figure 2 As shown, when the first limiting column 112 abuts against the mating surface 310, the cutter disc 10 is in the first position relative to the adapter sleeve 30, and the cutting blade 130 is located on the side of the base 110 facing away from the adapter sleeve 30. The cutting blade 130 has a first cutting height, specifically 20 mm.

[0057] When the cutting height of the cutting blade 130 needs to be adjusted, the cutter head 10 is rotated, as shown in FIG. Figures 5 to 7 As shown, the first limiting post 112 is inserted into the second hole 330. At this time, the cutter disc 10 is in the second position relative to the adapter sleeve 30, and the cutting blade 130 is still located on the side of the base 110 facing away from the adapter sleeve 30. The cutting blade 130 is at a second cutting height different from the first cutting height, specifically 30 mm. In a specific setting, the height of the first limiting post 112 is 10 mm. When adjusting from the second cutting height back to the first cutting height, it is equivalent to lowering the height of the cutter disc 10 from the ground by 10 mm. Therefore, the height of the cutting blade 130 from the ground is lowered by 10 mm, and the cutting height of the cutting blade 130 is reduced from 30 mm to 20 mm. When adjusting from the first cutting height back to the second cutting height, the first limiting post 112 enters the second hole 330, which is equivalent to raising the height of the cutter disc 10 from the ground by 10 mm. Therefore, the height of the cutting blade 130 from the ground is increased by 10 mm, and the cutting height of the cutting blade 130 is increased from 20 mm to 30 mm.

[0058] The lawn mower 100 of the above-described embodiment adjusts the cutting height by rotating the cutter disc 10 to change the mating position of the cutter disc 10 and the adapter sleeve 30 in the circumferential direction around the output shaft 210. Specifically, when the cutter disc 10 is in a first position relative to the adapter sleeve 30, the first limiting post 112 abuts the mating surface 310. When the cutter disc 10 is in a second position relative to the adapter sleeve 30, the base 110 of the cutter disc 10 abuts the mating surface 310. More specifically, when the cutter disc 10 is in the first position relative to the adapter sleeve 30, the first limiting post 112 abuts the mating surface 310, and the cutting blade 130 is farther from the mating surface 310 and closer to the ground. When the first limiting post 112 is inserted into the second hole 330, the distance between the cutting blade 130 and the mating surface 310 decreases, and the cutting blade 130's height above the ground increases, thereby adjusting the cutting height of the cutting blade 130. At the same time, to adjust the cutting blade 130 , it is only necessary to change the matching mode between the first limiting column 112 and the adapter sleeve 30 and change the axial relative position of the cutter disc 10 and the adapter sleeve 30 . The overall structure is relatively simple.

[0059] In addition, the lawn mower 100 of the above embodiment adjusts the cutting height by changing the axial relative position of the blade disc 10 and the adapter sleeve 30. Therefore, the motor 20 is fixed to the base, and there is no need to set a separate chamber (i.e., a motor cylinder) outside the motor 20, which simplifies the structure. At the same time, since there is no need to set a raising knob, stud, or other structure, there is no height adjustment knob, stud, or other structure to affect the sealing of the main chamber of the lawn mower 100, and the sealing of the main chamber is better. In the above embodiment, the first limiting post 112 is selectively matched with the first hole 320 and the second hole 330 with different apertures, wherein the first limiting post 112 enters the second hole 330 or abuts against one end of the first hole 320. In other embodiments, the depths of the first hole 320 and the second hole 330 are different, and the first limiting post 112 can be inserted into the first hole 320 and the second hole 330 respectively, and the cutting height is adjusted by limiting the insertion depth of the first limiting post 112.

[0060] In other embodiments, there are multiple first limiting posts 112 , and the heights of the multiple first limiting posts are different. At different mating positions, different first limiting posts are mated with mating holes, thereby achieving adjustment of the cutting height.

[0061] In the above embodiment of the lawn mower 100, the cutting blade 130 may also have a third cutting height and a fourth cutting height. Figure 1 As shown, combined Figures 8 to 10 The base 110 also has a second mounting surface 113 arranged back to back with the first mounting surface 111 , and a second limiting column 114 is provided on the second mounting surface 113 . The size of the second limiting column 114 is configured to be inserted into the second hole 330 but not into the first hole 320 .

[0062] By flipping the cutter disc 10, the second limit column 114 is matched with the adapter sleeve 30. By rotating the cutter disc 10, the matching mode of the second limit column 114 and the adapter sleeve 30 can be changed, thereby achieving the purpose of manually adjusting the cutting height of the cutting blade 130.

[0063] Specifically, when it is necessary to adjust the aforementioned first cutting height or second cutting height to the third cutting height or fourth cutting height, it can be done as follows.

[0064] First, flip the cutter disc 10 180 degrees so that the second mounting surface 113 faces the mating surface 310, and the cutting blade 130 is also flipped to face the adapter sleeve 30, and then the second limiting column 114 is abutted against the mating surface 310. The cutter disc 10 is in the third position relative to the adapter sleeve 30, and the cutting blade 130 has a third cutting height, specifically 40 mm.

[0065] In this embodiment, the base 110 and the support portion 120 have a height difference along the axial direction of the output shaft 210. When the cutter head 10 is in the first position relative to the adapter sleeve 30, the support portion 120 is located on the side of the base 110 facing away from the adapter sleeve 30, the first limiting post 112 abuts the mating surface 310, and the first cutting height of the cutting blade 130 is determined by the height of the support portion 120 above the ground. When the cutter head 10 is in the third position relative to the adapter sleeve 30, the support portion 120 is flipped to be located between the base 110 and the adapter sleeve 30, the second limiting post 114 abuts the mating surface 310, and the height of the second limiting post 114 is the same as the height of the first limiting post 112. The third cutting height of the cutting blade 130 is determined by the height of the support portion 120 above the ground. At this time, the height of the support portion 120 above the ground increases, so the third cutting height is increased compared to the first cutting height, specifically by 20 mm.

[0066] It should be further pointed out that the height of the first limiting column 112 and the height of the second limiting column 114 can be different, as long as it is ensured that: compared with when the cutter disc 10 is in the third position relative to the adapter sleeve 30, the height of the supporting portion 120 from the ground increases when the cutter disc 10 is in the third position relative to the adapter sleeve 30; at this time, it can also be ensured that the third cutting height is increased compared to the first cutting height. In other words, the height difference between the base 110 and the supporting portion 120, the height of the first limiting column 112 and the height of the second limiting column 114 can be flexibly set. When it is necessary to adjust the cutting height of the cutting blade 130, the cutting blade still faces the adapter sleeve 30, the cutter disc 10 is rotated, and the second limiting column 114 is inserted into the second hole 330. At this time, the cutter disc 10 is in the fourth position relative to the adapter sleeve 30, and the cutting blade 130 is at the fourth cutting height, specifically 50 mm.

[0067] In the lawn mower 100 of the above embodiment, when the cutter disc 10 is in the third position relative to the adapter sleeve 30, the second limiting post 114 abuts the mating surface 310, and the cutting blade 130 is farther from the mating surface 310 and closer to the ground. When the second limiting post 114 is inserted into the second hole 330, the distance between the cutting blade 130 and the mating surface 310 decreases, and the height of the cutting blade 130 from the ground increases, thereby enabling adjustment of the cutting position of the cutting blade 130. Furthermore, adjustment of the cutting position of the cutting blade 130 only requires changing the mating arrangement of the second limiting post 114 and the adapter sleeve 30, thereby changing the axial relative position of the cutter disc 10 and the adapter sleeve 30, resulting in a relatively simple overall structure.

[0068] In addition, when the cutter disc 10 is switched from the first position or the second position to the third position, since the cutting blade 130 is adjusted from facing away from the adapter sleeve 30 to facing the adapter sleeve 30, a third cutting height different from the first cutting height and the second cutting height can be obtained only by changing the position of the cutting blade 130. In this way, it is only necessary to flip the cutter disc 10, and the structural design of the cutter disc 10 is simple.

[0069] Furthermore, the cutting blade 130 can be removed and installed so that the cutting blade 130 is always installed on the side of the base 110 facing away from the adapter sleeve 30, and a third cutting height different from the first cutting height and the second cutting height can be obtained by adjusting only the height of the first limiting post 112 and the second limiting post 114. Furthermore, it is understood that the above two methods can be used in combination.

[0070] In the lawn mower 100 of the above embodiment, the cutter disc 10 and the adapter sleeve 30 are fixed together before and after the position of the cutter disc 10 is changed, so that the motor 20 can drive the cutter disc 10 to rotate normally through the adapter sleeve 30. The method of fixing the cutter disc 10 and the adapter sleeve 30 to each other before and after the relative axial position of the cutter disc 10 is changed is not limited, as long as they can be connected together.

[0071] Combine Figure 1 and Figure 2 As shown, in some embodiments, the first limiting post 112 has a first internal passage 1121 extending through the base 110, and the second limiting post 114 has a second internal passage 1141 extending through the base 110. The first limiting post 112 is preferably cylindrical in shape, but not limited thereto, and the first internal passage 1121 is preferably a circular hole, but not limited thereto. The second limiting post 114 is preferably cylindrical in shape, but not limited thereto, and the second internal passage 1141 is preferably a circular hole, but not limited thereto.

[0072] like Figure 1 As shown, combined with reference Figure 2When the cutter head 10 is in the first position, the first limiting column 112 abuts against the mating surface 310 , the first internal channel 1121 is aligned with the first hole 320 , and the connecting member 40 cooperates with the first internal channel 1121 and the first hole 320 .

[0073] like Figure 5 As shown, combined with reference Figure 6 When the cutter head 10 is in the second position, the first limiting column 112 is embedded in the second hole 330 , and the connecting member 40 cooperates with the second internal channel 1141 and the first hole 320 .

[0074] like Figure 8 As shown, combined with reference Figure 9 When the cutter head 10 is in the third position, the second limiting column 114 abuts against the mating surface 310 , the second internal channel 1141 is aligned with the first hole 320 , and the connecting member 40 cooperates with the second internal channel 1141 and the first hole 320 .

[0075] like Figure 11 As shown, combined with reference Figure 12 When the cutter head 10 is in the fourth position, the second limiting column 114 is embedded in the second hole 330 , the second internal channel 1141 is aligned with the first hole 320 , and the connecting member 40 cooperates with the second internal channel 1141 and the first hole 320 .

[0076] In one specific implementation, the first hole 320 is a threaded hole, the second hole 330 is a smooth hole, and the connecting member 40 is specifically a screw. When the cutter head 10 is in the first position, the screw passes through the first limiting post 112 and is threadedly connected to the first hole 320. When the cutter head 10 is in the second position, the first limiting post 112 is embedded in the second hole 330, and the screw passes through the second limiting post 114 and is threadedly connected to the first hole 320. When the cutter head 10 is in the third position, the screw passes through the second limiting post 114 and is threadedly connected to the first hole 320. When the cutter head 10 is in the fourth position, the second limiting post 114 is embedded in the second hole 330, and the screw passes through the first limiting post 112 and is threadedly connected to the first hole 320.

[0077] In the above embodiment, screws are used to connect and secure the cutter head 10 to the adapter sleeve 30. The screws pass through the first limiting post 112 or the second limiting post 114 and then threadably engage with the first hole 320. No additional holes are required on the base 110 of the cutter head 10 beyond the first limiting post 112 or the second limiting post 114. The connection and securing structure is integrated into the two limiting posts, facilitating a compact structure. For example, when the cutter head 10 is in the second position, the first limiting post 112 is already embedded in the second hole 330. To achieve the threaded connection between the screw and the first hole 320, if the second limiting post 114 is not utilized, additional holes would need to be provided on the base 110 for the screw to pass through, resulting in a more dispersed connection and compromised strength of the base 110.

[0078] In addition, when the cutter head 10 is in the four positions, the screws are all threadedly connected to the first hole 320, so the second hole 330 can be a light hole. The first internal channel 1121 and the second internal channel 1141 can both be set as light holes, which simplifies the structural design and facilitates processing.

[0079] Based on the above embodiment, the height of the first limiting post 112 is equal to the height of the second limiting post 114. In other words, the height of the first limiting post 112 protruding from the first mounting surface 111 is the same as the height of the second limiting post 114 protruding from the second mounting surface 113. In the specific embodiment, both are 10 mm. Because these two heights are identical, the length of the screw threaded connection between the screw and the first hole 320 remains unchanged when the cutterhead 10 is in any of the four positions, while the screw size remains unchanged. This improves versatility and ensures the bond strength between the cutterhead 10 and the adapter sleeve 30.

[0080] Based on the above embodiments, Figure 1 、 Figure 3 and Figure 13 As shown, there are three first limiting posts 112, which are evenly distributed along the circumference around the axis X of the output shaft 210. There are three second limiting posts 114, which are evenly distributed along the circumference around the axis X of the output shaft 210. Furthermore, on a plane perpendicular to the axis X of the output shaft 210, the projections of the first limiting posts 112 and the second limiting posts 114 are evenly distributed along the circumference around the axis X of the output shaft 210.

[0081] Since the first limiting column 112 and the second limiting column 114 are of the same height and the projection of the first limiting column 112 and the projection of the second limiting column 114 are evenly distributed along the circumference of the axis of the output shaft 210, when the cutter disc 10 is rotated, the first limiting column 112 can just rotate to the original position of the second limiting column 114 in the axial direction of the output shaft 210, so that multiple screws can be used to achieve multiple connections.

[0082] In another specific implementation, the first hole 320 and the second hole 330 are both light holes that pass through the adapter sleeve 30, and the connecting member 40 includes a bolt and a nut. When the cutter head 10 is in the first position, the bolt passes through the first limiting post 112 and the first hole 320 and is fastened by the nut; when the cutter head 10 is in the second position, the first limiting post 112 is embedded in the second hole 330, and the bolt passes through the second limiting post 114 and the first hole 320 and is fastened by the nut; when the cutter head 10 is in the third position, the bolt passes through the second limiting post 114 and the first hole 320 and is fastened by the nut; when the cutter head 10 is in the fourth position, the second limiting post 114 is embedded in the second hole 330, and the screw passes through the first limiting post 112 and the first hole 320 and is fastened by the nut.

[0083] like Figure 1 and Figure 2As shown, the first mounting surface 111 is further provided with a first collar 140 that fits over the adapter sleeve 30. When the cutterhead 10 is in the first or second position, the first collar 140 fits over the adapter sleeve 30. During installation, the first collar 140 serves as a guide. The second mounting surface 113 is further provided with a second collar 15 that fits over the adapter sleeve 30. When the cutterhead 10 is in the third or fourth position, the second collar 150 fits over the adapter sleeve 30. During installation, the second collar 150 serves as a guide.

[0084] like Figure 3 and Figure 7 As shown, in order to facilitate the adjustment of the cutting height, a digital mark is also provided on the first mounting surface 111 of the cutter disc 10. Specifically, the number "20" is marked next to each first limiting post 112, and the number "30" is also marked at intervals with the number "20" on the circumference of the cutter disc 10. There is a preset angle difference between the number "20" and the number "30". The number "20" defines the cutting height when the first limiting post 112 is aligned with the first hole 320, that is, the first cutting height; when it is necessary to adjust to the second cutting height, it is only necessary to rotate the cutter disc 10 by the angle difference between "20" and "30" to align the first limiting post 112 with the second hole 330, and then insert the second hole 330 to complete the adjustment of the cutting height.

[0085] Similarly, if Figure 13 As shown, the second mounting surface 113 of the cutter disc 10 is also provided with a digital identification. Specifically, the number "40" is marked next to each second limit post 114, and the number "50" is also marked at intervals from the number "40" in the circumferential direction of the cutter disc 10. There is a preset angle difference between the number "40" and the number "50". The number "40" defines the cutting height when the second limit post 114 is aligned with the first hole 320, that is, the third cutting height; when it is necessary to adjust to the fourth cutting height, it is only necessary to rotate the cutter disc 10 by the angle difference between "40" and "50" to align the second limit post 114 with the second hole 330, and then insert the second hole 330 to complete the adjustment of the cutting height.

[0086] Figure 14 The schematic diagram of a lawn mower 100 according to another embodiment of the present invention is shown. The lawn mower 100 includes a cutterhead 10 with a cutting blade 130, a motor 20, an adapter sleeve 30, a housing 50, and running wheels 60 supporting the housing 50. The adapter sleeve 30 has a mating surface 310, which is provided with a first hole 320 and a second hole 330. The first hole 320 is a threaded hole, and the second hole 330 is a plain hole. A first stopper 112 is provided on one side of the cutterhead 10. The first stopper 112 is sized to fit into the second hole 330 but not into the first hole 320.

[0087] Figure 14In the embodiment, the first limiting post 112 abuts the mating surface 310, and a screw passes through the first limiting post 112 and is threadedly engaged with the first hole 320, allowing the cutting blade 130 to have one cutting height. To adjust the cutting height, the cutter head 10 is rotated so that the first limiting post 112 is inserted into the second hole 330, and a screw passes through the second limiting post 114 and is threadedly engaged with the first hole 320, allowing the cutting blade 130 to have another cutting height.

[0088] As can be understood, the principles of this embodiment are similar to those of the previous embodiment, in that the cutting height of the cutting blade 130 is adjusted by changing the axial relative position of the cutter disc 10 and the adapter sleeve 30. The difference is that the cutting disc 10 of this embodiment is only provided with a limit post on one side, enabling adjustment of two cutting heights; the cutting height of the cutting blade 130 cannot be further adjusted by rotating the cutter disc 10 180 degrees.

[0089] In the lawn mowers of the above embodiments, the cutting height is changed by rotating the cutter disc 10 , and this can also be achieved by turning the cutter disc 10 over.

[0090] like Figure 15 and Figure 16 As shown, the cross-sectional structure of another embodiment of a lawn mower is illustrated. In this embodiment, the lawn mower includes a cutter disc 10 having a cutting blade 130, a motor 20, and an adapter sleeve 30. The motor 20 has an output shaft 210 for outputting rotational power. The adapter sleeve 30 is connected to the output shaft 210 and is driven to rotate by the motor 20. The cutter disc 10 is fixedly connected to the adapter sleeve 30. When the motor 20 is working, the output shaft 210 drives the cutter disc 10 to rotate through the adapter sleeve 30, and the cutter disc 10 drives the cutting blade 130 to rotate to form a cutting area. The above-mentioned cutter disc 10, cutting blade 130, motor 20, and adapter sleeve 30 can be collectively referred to as the cutting mechanism of the lawn mower 100, which is usually arranged in the middle position below the housing of the lawn mower 100.

[0091] As shown in the figure, the lawn mower further includes a housing 50 and running wheels 60. The housing 50 includes a base 510, a cover 520, and a decorative cover 530. The motor 20 is fixed to the base 510, the cover 520 covers the base 510 to shield the motor 20, and the decorative cover 530 is mounted on the cover 520. The cover 520 and the base 510 form the main chamber of the lawn mower.

[0092] In order to adjust the cutting height of the cutting blade 130, the lawn mower of this embodiment provides a variety of ways to achieve it. It can be understood that these ways can be used alone or in combination.

[0093] In a specific embodiment, the cutting blade 130 is mounted on the cutter head 10 in an adjustable position along the axial direction of the output shaft 210. Specifically, the cutting blade 130 has multiple mounting positions on the cutter head 10. By fixing the cutting blade 130 at different mounting positions, the cutting height of the lawn mower can be changed.

[0094] In another embodiment, the cutter disc 10 is detachably connected to the mating surface 310 of the adapter sleeve 30. Since the cutter disc 10 is detachable, when the cutting height of the lawn mower needs to be adjusted, the cutter disc can be replaced.

[0095] In another embodiment, the adapter sleeve 30 is detachably connected to the output shaft 210. The adapter sleeve 30 is detachable, and when the cutting height of the lawn mower needs to be adjusted, the adapter sleeve 30 can be replaced to change the matching mode between the adapter sleeve 30 and the output shaft 210; the position of the adapter sleeve 30 on the output shaft 210 can also be adjusted.

[0096] In another embodiment, the cutterhead 10 is configured to selectively engage the output shaft 210. The cutterhead 10 includes a base 110, a support portion 120 connected to the base 110, and a cutting blade 130 disposed on the support portion 120. The base 110 has a first mounting surface 111 and a second mounting surface 113 facing away from each other. When the first mounting surface and the second mounting surface are respectively oriented toward the motor 20, the cutting blade 130 has different cutting heights. In other words, by mounting the cutterhead 10 in either direction, the cutting blade 130 can be moved closer to or further away from the adapter sleeve 30, thereby varying the cutting height.

[0097] In the above-mentioned lawn mower, a variety of ways are provided to change the cutting height of the lawn mower. In these ways, the motor 20 does not need to be provided with a separate chamber (i.e., a motor cylinder), nor does it need to be provided with a height adjustment structure that needs to pass through the main chamber. The sealing effect of the main chamber is better.

[0098] like Figure 17 As shown, in another embodiment, the mating surface 310 of the adapter sleeve 30 includes multiple sub-mating surfaces, specifically a first sub-mating surface 311, a second sub-mating surface 312, and a third sub-mating surface 313. By rotating the cutter head 10 or the adapter sleeve 30, the different sub-mating surfaces can be mated with the cutter head 10, thereby achieving three cutting height adjustments. This embodiment uses three sub-mating surfaces as an example, but it is understood that the number of sub-mating surfaces is not limited to this.

[0099] like Figure 17As shown, the first sub-matching surface 311, the second sub-matching surface 312, and the third sub-matching surface 313 are each provided at two locations, alternately and evenly spaced along the circumference of the adapter sleeve 30. The first sub-matching surface 311, the second sub-matching surface 312, and the third sub-matching surface 313 have different heights, resulting in different axial positions of the output shaft 210. Each of the first sub-matching surface 311, the second sub-matching surface 312, and the third sub-matching surface 313 is provided with a threaded hole.

[0100] like Figure 18 As shown, to achieve a first cutting height of, for example, 50 mm, the first limiting post 112 of the cutter head 10 is rotated to a position aligned with the threaded hole on the first sub-matching surface 311. The first limiting post 112 of the cutter head 10 then abuts against the first sub-matching surface 311, and the connector 40 passes through the first limiting post 112 and connects to the threaded hole on the first sub-matching surface 311, thereby enabling the mower to reach the first cutting height.

[0101] like Figure 19 As shown, to achieve a second cutting height of, for example, 40 mm, the first limiting post 112 of the cutter head 10 is rotated to a position aligned with the threaded hole on the second sub-matching surface 312. The first limiting post 112 of the cutter head 10 then abuts against the second sub-matching surface 312, and the connector 40 passes through the first limiting post 112 and connects to the threaded hole on the second sub-matching surface 311, thereby enabling the mower to reach the second cutting height.

[0102] like Figure 20 As shown, to achieve a third cutting height of, for example, 30 mm, the first limiting post 112 of the cutter head 10 is rotated to a position aligned with the threaded hole on the third sub-matching surface 312. The first limiting post 112 of the cutter head 10 then abuts against the third sub-matching surface 312, and the connector 40 passes through the first limiting post 112 and connects to the threaded hole on the third sub-matching surface 311, thereby enabling the mower to reach the third cutting height.

[0103] In the above embodiment, by providing sub-matching surfaces with different heights on the adapter sleeve 30 and rotating the cutter disc 10 , the cutter disc 10 can be matched with different sub-matching surfaces, thereby achieving adjustment of the cutting height.

[0104] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A lawn mower, characterized in that: include: base; an upper cover, disposed above the base, and forming a main chamber with the base; A motor is located in the main chamber, the motor is fixed to the base, and has an output shaft; An adapter sleeve, the adapter sleeve is fixed to the output shaft, the end of the adapter sleeve facing away from the motor is a mating surface, and the mating surface is provided with a plurality of matching holes; A cutter disc having a cutting blade is connected to the mating surface. The cutter disc is provided with a limiting column that can cooperate with different mating holes to make the position of the cutting blade adjustable in the axial direction of the output shaft; wherein the limiting column is inserted into the mating hole or abuts against the mating surface; the apertures or depths of the multiple mating holes are different, or the number of the limiting columns is multiple and the heights of the multiple limiting columns are different.

2. The lawn mower according to claim 1, wherein: The matching surface includes a plurality of sub-matching surfaces at different positions in the axial direction of the output shaft, and each of the sub-matching surfaces is provided with a threaded hole that can be matched with the limiting column.

3. The lawn mower according to claim 1, wherein: The matching hole includes a first hole and a second hole with different inner diameters; The cutter disc is configured to selectively cooperate with the adapter sleeve, wherein the cutter disc includes a base, a bearing portion connected to the base, and a cutting blade provided on the bearing portion, the base having a first mounting surface for facing the mating surface, a first limiting post being provided on the first mounting surface, and a size of the first limiting post being configured to be inserted into the second hole but not into the first hole; Wherein, when the first limiting post abuts against the matching surface, the cutter disc is in a first position relative to the adapter sleeve, and the cutting blade has a first cutting height; When the first limiting post is inserted into the second hole, the cutter disc is in a second position relative to the adapter sleeve, and the cutting blade has a second cutting height different from the first cutting height.

4. The lawn mower according to claim 3, characterized in that The base further comprises a second mounting surface disposed opposite to the first mounting surface, wherein a second limiting post is disposed on the second mounting surface, and the size of the second limiting post is configured to be inserted into the second hole but not into the first hole; Wherein, when the second limiting post abuts against the matching surface, the cutter disc is in a third position relative to the adapter sleeve, and the cutting blade has a third cutting height; When the second limiting column is inserted into the second hole, the cutter disc is in a fourth position relative to the adapter sleeve, and the cutting blade is at a fourth cutting height. The fourth cutting height and the third cutting height are different from each other and different from the first cutting height and the second cutting height.

5. The lawn mower according to claim 4, characterized in that When the cutter disc is in the first position or the second position, the cutting blade faces away from the adapter sleeve; when the cutter disc is in the third position or the fourth position, the cutting blade faces the adapter sleeve.

6. The lawn mower according to claim 4, characterized in that The first cutting height is 20 mm, the second cutting height is 30 mm, the third cutting height is 40 mm, and the fourth cutting height is 50 mm.

7. The lawn mower according to claim 1, wherein: The cutter disc abuts against the matching surface, and an adjustment gasket is provided between the cutter disc and the matching surface.

8. The lawn mower according to claim 1, wherein The cutting blade is mounted on the cutter disc in an adjustable manner along the axial direction of the output shaft.

9. The lawn mower according to claim 1, wherein The cutter disc is detachably connected to the adapter sleeve.

10. The lawn mower according to claim 1, wherein The adapter sleeve is detachably connected to the output shaft or is adjustably arranged along the axial position of the output shaft.

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