Cutting device of mower and mower

Abstract

The utility model provides a cutting device of a mowing machine and the mowing machine, and the cutting device of the mowing machine comprises a connecting piece which is connected to a rotating shaft and rotates along with the rotating shaft; the cutterhead assembly comprises a cutterhead support and one or more blades arranged on the cutterhead support; and the locking piece penetrates through the cutterhead support to be connected with the connecting piece, so that the cutterhead assembly is connected to the connecting piece in a matched mode, and the cutterhead assembly synchronously rotates along with the connecting piece. The mower comprises a motor with a motor shaft and a cutting device mounted on the motor shaft. The maintenance cost of the cutting device can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electric tools, and in particular to a cutting device of a lawn mower and a lawn mower. Background Art

[0002] A lawn mower is a tool used to trim lawns, vegetation, etc. A cutting assembly is provided at the bottom of the lawn mower. The cutting device includes a cutter disc, a blade detachably provided on the cutter disc, and a connecting structure connecting the cutter disc to the motor shaft. The motor rotates at high speed, and the cutter disc is driven to rotate through the connecting structure to achieve lawn trimming.

[0003] However, during the operation of the lawn mower, the cutting device will inevitably be hit. When the cutting device is hit, the blade disc is directly subjected to force, and the part of the connecting structure that passes through the blade disc is most likely to be damaged. Secondly, the part of the connecting structure that is located above the blade disc and connected to the motor shaft is also easily damaged.

[0004] In the prior art, the cutter disc is mounted on the connector, and the connector is installed on the motor shaft with an interference fit. When the cutter disc is hit, the connector passing through the cutter disc is easily damaged. Since the connector is not a standard part, its cost is high, and the cost of repair and replacement is also high.

[0005] In another mounting structure, the cutter disc is locked on the motor shaft with bolts, and the bolts are threadedly engaged with the motor shaft. When the cutter disc is hit, it is easy to cause the threads of the motor shaft to be damaged. Once the threads of the motor shaft are damaged, the entire motor must be replaced, which is cumbersome to repair and has a higher replacement cost. Summary of the invention

[0006] In view of this, an object of the present application is to provide a cutting device of a lawn mower and a lawn mower, so as to reduce the maintenance cost of the cutting device.

[0007] Based on the above-mentioned purpose, the first aspect of the present application provides a cutting device of a lawn mower, comprising: a connecting member, connected to a rotating shaft and rotating with the rotating shaft; a blade disc assembly, comprising a blade disc bracket and one or more blades arranged on the blade disc bracket; a locking member, the locking member passes through the blade disc bracket and is connected to the connecting member to cooperate with the blade disc assembly to connect the blade disc assembly to the connecting member and enable the blade disc assembly to rotate synchronously with the connecting member.

[0008] Furthermore, the connecting member is detachably connected to the rotating shaft.

[0009] Furthermore, the locking member includes a locking operating portion and a rod body portion connected to the locking operating portion, the rod body portion passes through the cutter disc bracket and is connected to the connecting member, and the locking operating portion abuts against the bottom of the cutter disc bracket.

[0010] Furthermore, the rod body portion passes through the cutter disc bracket, the rod body portion is provided with an external thread, the connecting piece is provided with an internal thread, and the rod body portion and the connecting piece are threadedly matched and connected.

[0011] Furthermore, the cutting device also includes a grass protection disc assembly, and the grass protection disc assembly is rotatably connected to the blade disc bracket.

[0012] Furthermore, the blade disc bracket has a mounting portion for the locking member to pass through, and the grass protection disc assembly is rotatably connected to the mounting portion. The cutting device also includes a stopper connected to an end of the mounting portion away from the connecting member to limit the grass protection disc assembly between the blade disc bracket and the stopper.

[0013] Furthermore, the cutting device also includes a dust cover assembly, and the dust cover assembly is connected to the grass protection disc assembly to form a space for accommodating the locking member.

[0014] Furthermore, the dust cover assembly includes a dust cover, the grass protection disc assembly includes a grass protection disc bracket, a grass protection disc connected to the grass protection disc bracket, and a bearing assembly arranged between the grass protection disc bracket and the blade disc bracket, and the dust cover is detachably connected to the grass protection disc bracket.

[0015] Furthermore, the rotating shaft is a motor shaft.

[0016] The second aspect of the present application further provides a lawn mower, comprising a motor having a motor shaft, characterized in that it also comprises a cutting device installed on the motor shaft and as described in any one of the first aspect of the present application.

[0017] From the above, it can be seen that in the cutting device and lawn mower of the lawn mower provided in the present application, the locking member passes through the blade disc bracket and is connected to the connecting member, and the connecting member is connected to the rotating shaft. When the cutting device is hit, the locking member passing through the blade disc bracket is directly stressed, and the connecting member connected to the locking member is indirectly stressed. In terms of the possibility of damage, among the locking member, the connecting member and the rotating shaft, the most susceptible to damage is the locking member, and the second most susceptible to damage is the connecting member. Since there is no thread on the rotating shaft, the rotating shaft is not easily damaged. If the locking member is damaged, only the locking member needs to be replaced. The locking member is a standard part, thereby reducing maintenance costs. If the connecting member is damaged, only the connecting member can be replaced without replacing the entire motor. In this way, the maintenance cost and difficulty of the cutting device can be reduced to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 An overall diagram of a lawn mower according to an embodiment of the present application;

[0020] Figure 2 An exploded view of a lawn mower according to an embodiment of the present application;

[0021] Figure 3 An exploded view of a cutting device according to an embodiment of the present application;

[0022] Figure 4 A cross-sectional view of a cutter head support according to an embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of the structure of the connecting member of an embodiment of the present application;

[0024] Figure 6 A cross-sectional view of a connector according to an embodiment of the present application;

[0025] Figure 7 for Figure 3 A partial schematic diagram of

[0026] Figure 8 This is a schematic diagram of the connection relationship between the stopper and the cutter disc bracket of the embodiment of the present application;

[0027] Fig. 9 This is a schematic diagram of a disassembled state of the lawn mower according to an embodiment of the present application;

[0028] Fig.10 This is another schematic diagram of the lawn mower in the embodiment of the present application in a disassembled state;

[0029] Fig.11 A schematic diagram of the structure of the dust cover of an embodiment of the present application at a viewing angle;

[0030] Fig.12 This is a schematic structural diagram of the dust cover of an embodiment of the present application from another viewing angle;

[0031] Fig.13 A cross-sectional view of a grass protection disc bracket according to an embodiment of the present application;

[0032] Fig.14 This is a schematic structural diagram of a grass protection disc bracket according to an embodiment of the present application, wherein a buckle is provided at the bottom of the grass protection disc bracket.

[0033] The following are the descriptions of the figures:

[0034] 100. Lawn mower; 200. Motor; 300. Cutting device; 1. Connecting piece; 11. First end; 12. Second end; 13. Limiting protrusion; 14. Guide section; 2. Rotating shaft; 3. Cutter disc assembly; 31. Cutter disc bracket; 311. Limiting groove; 312. Guide groove; 313. Mounting part; 32. Blade; 33. Cutter disc; 34. Cutter disc fixing screw; 35. Blade fixing screw; 4. Locking piece; 41. Locking operating part; 42. Rod body; 5. Grass guard disc assembly; 51. Grass guard disc bracket; 511. Buckle; 52. Grass guard disc; 521. Operating through hole; 53. Bearing assembly; 54. Grass guard disc fixing screw; 6. Stopper; 7. Dust cover assembly; 71. Dust cover; 711. Protrusion; 712. Rotating operating part; 72. Sealing ring. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] The cutting device 300 of the lawn mower 100 and the lawn mower 100 having the same provided in an embodiment of the present application can reduce the product maintenance cost and maintenance difficulty when the cutting device 300 is hit to a certain extent. Figure 1 and Figure 2 As shown, the lawn mower 100 includes a motor 200 having a motor shaft, and a cutting device 300 of the lawn mower 100 is mounted on the motor shaft.

[0038] like Figures 1 to 3As shown, in some embodiments, the cutting device 300 of the lawn mower 100 may include: a connecting member 1, which is connected to the rotating shaft 2 and rotates with the rotating shaft 2; a blade disc assembly 3, which includes a blade disc bracket 31 and one or more blades 32 arranged on the blade disc bracket 31; a locking member 4, which passes through the blade disc bracket 31 and is connected to the connecting member 1 to connect the blade disc assembly 3 to the connecting member 1 so that the blade disc assembly 3 can rotate synchronously with the connecting member 1.

[0039] like Figure 1 and Figure 2 As shown, the rotating shaft 2 in this embodiment is a motor shaft. In other embodiments, the rotating shaft 2 can also be adapted to be any other shaft form suitable for driving the connecting member 1 to rotate, such as a reducer output shaft, and is not limited here.

[0040] like Figure 1 and Figure 2 As shown, the connecting member 1 is arranged concentrically with the rotating shaft 2. Figure 3 , Figure 5 and Figure 6 As shown, the connecting member 1 has a first end 11 and a second end 12 which are arranged opposite to each other along its axial direction. A first connecting portion for connecting to the rotating shaft 2, a second connecting portion for connecting to the locking member 4, and a third connecting portion for cooperating with the cutter head 33 are arranged between the first end 11 and the second end 12 of the connecting member 1. Among them, the first connecting portion extends from the first end 11 of the connecting member 1 to the second end 12, and the second connecting portion extends from the second end 12 of the connecting member 1 to the first end 11, and the first connecting portion and the second connecting portion do not overlap. The third connecting portion is arranged between the first end 11 and the second end 12, and the third connecting portion may at least partially overlap with the first connecting portion and / or the second connecting portion. For example, in this embodiment, the third connecting portion partially overlaps with the first connecting portion and the second connecting portion, respectively. In other embodiments, the third connecting portion may also not overlap with both the first connecting portion and the second connecting portion.

[0041] The first connection portion of the connector 1 is configured to be detachably connected to the rotating shaft 2 to facilitate quick disassembly and replacement of the connector 1. For example, the first connection portion and the rotating shaft 2 may be connected by interference fit, snap connection, etc., which are not limited here.

[0042] The second connection part of the connector 1 is connected to the locking member 4 passing through the cutter disc bracket 31 to axially limit the cutter disc bracket 31. The third connection part of the connector 1 is connected in cooperation with the cutter disc bracket 31 to circumferentially limit the cutter disc bracket 31. When the cutter disc bracket 31 is locked on the connector 1 by the locking member 4, the second connection part of the connector 1 cooperates with the locking member 4 to achieve axial limitation of the cutter disc bracket 31, and the third connection part of the connector 1 cooperates with the cutter disc bracket 31 to achieve circumferential limitation of the cutter disc bracket 31. The cutter disc bracket 31 and the connector 1 do not move relative to each other in the circumferential direction and in the axial direction. When the connector 1 rotates with the rotating shaft 2, the connector 1 drives the cutter disc bracket 31 to rotate synchronously.

[0043] In some embodiments, the second connection portion of the connecting member 1 is detachably connected to the locking member 4, so as to facilitate and quickly remove and replace the locking member 4 from the connecting member 1 and release the axial locking of the cutter head assembly 3. Figure 1 and Figure 2 As shown, in this embodiment, the second connection portion of the connector 1 is threadedly connected to the locking member 4. In other embodiments, the second connection portion and the locking member 4 may also be connected in a detachable manner such as interference fit, pin connection, key connection, snap connection, etc., which is not limited here.

[0044] like Figure 2 and Figure 3 As shown, in some embodiments, the locking member 4 includes a locking operating portion 41 and a rod portion 42 connected to the locking operating portion 41. The rod portion 42 is provided with a threaded section, and at least part of the threaded section of the rod portion 42 passes through the cutter disc bracket 31 and is threadedly engaged with the second connecting portion of the connecting member 1, and the locking operating portion 41 abuts against the bottom of the cutter disc bracket 31. When the connecting member 1 cooperates with the locking member 4 to achieve axial limitation of the cutter disc bracket 31, the top of the cutter disc bracket 31 abuts against the third connecting portion of the connecting member 1, and the bottom of the cutter disc bracket 31 abuts against the locking operating portion 41 of the locking member 4. Among them, the top of the cutter disc bracket 31 is located at one end of the cutter disc bracket 31 close to the connecting member 1, and the bottom of the cutter disc bracket 31 is located at one end of the cutter disc bracket 31 away from the connecting member 1.

[0045] like Figure 2 and Figure 3 As shown, in this embodiment, the threaded section of the rod body 42 is provided with an external thread, and the second connecting portion of the connector 1 has an internal thread adapted to the external thread. In order to further save replacement costs and improve maintainability, the locking member 4 can also be set as a standard part, such as a screw. Compared with non-standard parts, screws are lower in cost and can be operated by users. It should be noted that in other embodiments, the threaded engagement of the locking member 4 and the connector 1 can also be realized in the form of providing an internal thread on the threaded section of the rod body 42 and providing an external thread adapted to the internal thread on the second connecting portion of the connector 1, which is not limited here.

[0046] In some embodiments, please combine Figures 4 to 6 , the third connection part of the connection member 1 cooperates with the cutter disc support 31 in circumferential limiting. Specifically, the third connection part of the connection member 1 is a limiting protrusion 13, and the top of the cutter disc support 31 has a limiting groove 311 adapted to the limiting protrusion 13. When the limiting protrusion 13 is located in the limiting groove 311, the connection member 1 drives the cutter disc support 31 having the limiting groove 311 to rotate through the limiting protrusion 13, so that the cutter disc support 31 and the connection member 1 are circumferentially limited. In this embodiment, the limiting protrusion 13 is as follows Figure 5-Figure 6 The hexagonal protrusion shown in FIG. Figure 4 In other embodiments, the shape of the limiting protrusion 13 can also be other shapes that can drive the limiting groove 311 to rotate circumferentially, which is not limited in this document.

[0047] In some embodiments, Figure 4 As shown, the cutter head support 31 further includes a guide groove 312, which is arranged below the limiting groove 311, and includes an alignment section that tapers axially downward. Figure 5 and Figure 6 As shown, a guide section 14 is provided at the lower end of the connecting member 1 . The guide section 14 is provided below the limiting protrusion 13 . The guide section 14 includes an alignment section which tapers axially downward. Figure 3 A vertical section of the connecting member 1 and the cutter disc support 31 is shown, wherein the connecting member 1 is shown as being separated from the cutter disc support 31. When the cutter disc support 31 is pressed upward toward the connecting member 1, the tapered section of the guide groove 312 cooperates with the tapered section of the guide section 14 to radially align the cutter disc support 31 with the connecting member 1, and the guide groove 312 of the cutter disc support 31 and the guide section 14 of the connecting member 1 form an axial centering limit to ensure the coaxiality of the cutter disc support 31 and the connecting member 1, thereby reducing vibration during rotation.

[0048] In some embodiments, Figure 1-Figure 3 As shown, the cutter head assembly 3 further includes a cutter head 33, and the cutter head 33 is detachably connected to the cutter head bracket 31 to facilitate maintenance of the cutter head assembly 3. Figure 3As shown, in this embodiment, the cutter disc 33 is axially fixed on the cutter disc bracket 31 by a cutter disc fixing screw 34, and the cutter disc 33 and the cutter disc bracket 31 are circumferentially limited by a concave-convex structure, so that the cutter disc 33 rotates synchronously with the cutter disc bracket 31. Specifically, the cutter disc 33 and the cutter disc bracket 31 are provided with threaded holes at corresponding positions, and the cutter disc fixing screw 34 passes through the cutter disc 33 and the cutter disc bracket 31 in turn and forms a threaded connection, thereby achieving axial fixation of the cutter disc 33 and the cutter disc bracket 31. The number of the cutter disc fixing screws 34 is not specifically limited here, and can be one, two, three, etc. One of the cutter disc 33 and the cutter disc bracket 31 is provided with a protrusion, and the other is provided with a groove that cooperates with the protrusion. When the cutter disc 33 and the cutter disc bracket 31 are axially fixed, the protrusion and the groove are first matched to achieve circumferential limitation. Circumferential limiting is achieved through the concave-convex structure, thereby further increasing the rotation synchronization of the cutter disc 33 and the cutter disc bracket 31, avoiding relative displacement between the cutter disc 33 and the cutter disc bracket 31 due to loosening of the cutter disc fixing screws 34 and the threaded holes, and reducing noise during rotation.

[0049] In other embodiments, the cutter disc 33 and the cutter disc support 31 may also achieve axial limitation and circumferential limitation through other forms, such as welding, etc., which are not limited here.

[0050] In some embodiments, the blade disc 33 is detachably connected to the blade 32. Figure 1 and Figure 3 As shown, in this embodiment, the blade 32 is fixed to the cutter disc 33 by a blade fixing screw 35, so that the blade 32, the cutter disc 33 and the cutter disc bracket 31 can rotate synchronously. In other embodiments, the cutter disc 33 and the blade 32 can also be connected in other ways, such as tool-free connection.

[0051] During the cutting process, the motor 200 of the lawn mower 100 drives the blade disc assembly 3 to rotate, and the friction between the bottom of the blade disc 33 and the lawn generates resistance, thereby causing energy loss. To reduce energy loss, in some embodiments, the cutting device 300 may further include a grass protection disc assembly 5, which is rotatably connected to the blade disc bracket 31.

[0052] In some embodiments, Figure 7As shown, the grass protection disc assembly 5 includes a grass protection disc bracket 51, and the blade disc bracket 31 has a mounting portion 313 for the rod body portion 42 of the locking member 4 to pass through, and the grass protection disc assembly 5 is rotatably connected to the mounting portion 313. The cutting device 300 also includes a stopper 6, which is detachably connected to the end of the mounting portion 313 away from the connecting member 1 to limit the grass protection disc assembly 5 between the blade disc bracket 31 and the stopper 6, thereby achieving axial fixation of the grass protection disc assembly 5. At the same time, the connection between the stopper 6 and the mounting portion 313 can also enable the grass protection disc assembly 5 and the blade disc assembly 3 to form a whole, thereby achieving the combination of the grass protection disc assembly 5 and the blade disc assembly 3. In these embodiments, since the stopper 6 is connected to the mounting portion 313 to enable the grass protection disc assembly 5 and the blade disc assembly 3 to form a whole, even if the locking member 4 is loosened, the blade disc assembly 3 and the grass protection disc assembly 5 will not loosen. In other words, Fig. 9 The connection between the locking member 4 and the connecting member 1 is loosened, and the locking member 4 is pulled out from the cutter head bracket 31, so that the following can be achieved: Fig.10 The state shown is conducive to the rapid disassembly and replacement of the locking member 4.

[0053] like Figure 8 As shown, in this embodiment, the stopper 6 is provided with an internal thread, and the end of the mounting portion 313 away from the connector 1 is provided with an external thread adapted to the internal thread of the stopper 6, and the stopper 6 is threadedly connected to the mounting portion 313. It should be noted that other detachable connection methods can also be applied in this article.

[0054] In some embodiments, Figure 7 As shown, the grass protection disc assembly 5 also includes a bearing assembly 53. The grass protection disc bracket 51 is rotatably connected to the blade disc bracket 31 through the bearing assembly 53. Specifically, the bearing assembly 53 includes at least one bearing, the outer ring of the bearing is detachably connected to the grass protection disc bracket 51, the inner ring of the bearing is detachably connected to the blade disc bracket 31, and the outer ring and the inner ring of the bearing are relatively rotatable so that the grass protection disc bracket 51 does not rotate with the blade disc bracket 31. In this embodiment, the grass protection disc bracket 51 and the outer ring of the bearing are pressed into an interference fit, and the inner ring of the bearing and the blade disc bracket 31 are clearance fit, so as to facilitate the disassembly and assembly between the grass protection disc assembly 5 and the blade disc assembly 3.

[0055] In some embodiments, Figure 1-Figure 3As shown, the grass protection disc assembly 5 also includes a grass protection disc 52, which is arranged below the blade disc 33 to isolate the blade disc 33 from the lawn, so as to avoid energy loss caused by friction between the bottom of the blade disc 33 and the lawn during cutting. At the same time, the grass protection disc 52 is detachably connected to the grass protection disc bracket 51 for axial limitation, and the grass protection disc 52 is limitedly connected to the grass protection disc bracket 51 to achieve circumferential limitation. In this way, when the grass protection disc bracket 51 does not rotate with the blade disc bracket 31, the grass protection disc 52 does not rotate synchronously with the blade disc 33, which can reduce the energy loss caused by the rotation and friction with the lawn to a certain extent. Figure 3 As shown, in this embodiment, the grass protection disc 52 is axially fixed on the grass protection disc bracket 51 by the grass protection disc fixing screw 54, the inner ring of the grass protection disc 52 is provided with a through hole, and the grass protection disc bracket 51 is provided with a protrusion adapted to the through hole on the grass protection disc 52, and the two cooperate to form a circumferential limit, so that the assembly and disassembly of the grass protection disc 52 and the grass protection disc bracket 51 are more convenient and faster. The connection method between the grass protection disc 52 and the grass protection disc bracket 51 is the same as the connection method between the blade 33 and the blade bracket 31, and will not be repeated here. Obviously, the connection method between the grass protection disc 52 and the grass protection disc bracket 51 and the connection method between the blade 33 and the blade bracket 31 can also be the same, as long as the circumferential and axial limits can be achieved.

[0056] As described above, the blade 32 is fixed to the blade disc 33 by the blade fixing screw 35. Figure 1-Figure 3 As shown, at least one operation through hole 521 is provided on the outer ring of the grass protection disc 52, and the connection position between the blade 32 and the blade disc 33 (i.e., the position of the blade fixing screw 35) is arranged corresponding to the operation through hole 521. A screwdriver can pass through the operation through hole 521 to loosen or tighten the blade fixing screw 35 on the blade disc 33, so as to realize quick replacement of the blade 32. When replacing the blade 32, there is no need to disassemble the grass protection disc assembly 5 or the grass protection disc 52, and only the operation through hole 521 needs to be aligned with the blade fixing screw 35, which is convenient to operate.

[0057] In this embodiment, the number of the operating through hole 521 is one, which can achieve low maintenance and ensure that the grass protection disc 52 reduces the energy loss caused by the friction between the rotation of the blade disc 33 and the lawn. When the blade 32 needs to be replaced, the grass protection disc 52 is operated to rotate relative to the blade disc 33 until the operating through hole 521 is aligned with a blade disc fixing screw 35, and the blade fixing screw 35 can be operated. After the operation is completed, the grass protection disc 52 is driven to rotate relative to the blade disc 33 until the operating through hole 521 is aligned with the next blade fixing screw 35. In other embodiments, the number of the operating through holes 521 can also be two, three, etc.

[0058] In some embodiments, Figure 2 , Fig. 9 and Fig.10As shown, the cutting device 300 also includes a dust cover assembly 7, which is connected to the grass protection disc assembly 5 to form a space for accommodating the locking member 4. The dust cover assembly 7 can prevent grass clippings, dust, etc. from entering the space for accommodating the locking member 4 to a certain extent and affecting the rotation of the bearing assembly 53. Removing the dust cover assembly 7 can achieve the following results: Fig. 9 The lawn mower 100 is shown in a disassembled state.

[0059] In some embodiments, the dust cover assembly 7 may include a dust cover 71, which is detachably connected to the grass protection disc bracket 51, and can prevent grass clippings, dust, etc. from entering the bearing assembly 53 during the cutting process to a certain extent.

[0060] In some embodiments, the dust cover 71 is locked to the grass protection disc bracket 51 by rotation to facilitate the installation of the dust cover 71. Fig.11 As shown, the dust cover 71 has at least one protrusion 711 arranged along the circumferential direction. Fig.13 and Fig.14 As shown, at least one buckle 511 adapted to the at least one protrusion 711 is correspondingly provided on the grass protection disc bracket 51. By rotating the dust cover 71, the at least one protrusion 711 provided thereon is engaged with the at least one buckle 511 provided on the grass protection disc bracket 51, and rotation locking can be achieved, so as to achieve the following. Figure 1 The installation status is shown.

[0061] In some embodiments, the dust cover 71 is connected to the grass protection disc assembly 5 by a flexible strap (not shown) when in the open position to prevent it from being lost.

[0062] In some embodiments, Fig.12 As shown, the dust cover 71 includes a rotating operating part 712, which is used to drive the dust cover 71 to rotate so as to lock or unlock the dust cover 71 and the grass protection disc bracket 51. The rotating operating part 712 is arranged on the side of the dust cover 71 away from the grass protection disc bracket 51, and the rotating operating part 712 is a protrusion and / or a recessed part. In this embodiment, the rotating operating part 712 is a hexagonal protrusion 711, which can be driven by a hexagonal wrench to lock or unlock the dust cover 71. In addition, when the rotating operating part 712 and the locking operating part 41 of the locking member 4 have the same or similar shape and size, the two can share the same tool for unlocking.

[0063] In some embodiments, Fig. 9 and 10 As shown, the dust cover assembly 7 may further include a sealing ring 72. The dust cover 71 cooperates with the grass protection disc bracket 51 to squeeze the sealing ring 72 to prevent grass clippings, dust, etc. from entering the bearing assembly 53 through the gap between the dust cover 71 and the grass protection disc 52 during cutting.

[0064] The following describes the assembly process of the cutting device 300 by taking the locking member 4 as a bolt as an example. The assembly process of the cutting device 300 may include the following steps:

[0065] S1: Assemble the blade disc assembly 3 and the grass protection disc assembly 5 into a whole;

[0066] Wherein, step S1 comprises the following steps:

[0067] S11: Assemble the cutter head assembly 3;

[0068] S12: Assembling the grass protection disc assembly 5;

[0069] S13: The grass protection disc assembly 5 is axially passed through the blade disc bracket 31 and axially locked with the stopper 6.

[0070] S2: Assemble the blade disc assembly 3 and the grass protection disc assembly 5 to form a whole onto the cutting device 300.

[0071] Wherein, step S2 comprises the following steps:

[0072] S21: Match the cutter head bracket 31 with the connecting piece 1;

[0073] S22: Pass the bolt through the cutter head bracket 31 and connect it to the connecting member 1, and drive the end of the bolt with a hexagonal wrench to make the cutter head assembly 3 on the connecting member 1;

[0074] S23: Rotate and screw the dust cover 71 onto the grass protection disc assembly 5.

[0075] The present application also provides a lawn mower 100, such as Figure 1-Figure 3 As shown, the lawn mower 100 includes a motor 200 having a motor shaft and a cutting device 300 mounted on the motor shaft. The description of the cutting device 300 is detailed in the description of the above-mentioned embodiment of the cutting device 300, which will not be repeated here.

[0076] The cutting device and lawn mower of the lawn mower provided in the embodiment of the present application, the locking member passes through the blade disc bracket and is connected to the connecting member, and the connecting member is connected to the rotating shaft. When the cutting device is hit, the locking member passing through the blade disc bracket is directly stressed, and the connecting member connected to the locking member is indirectly stressed. In terms of the possibility of damage, among the locking member, the connecting member and the rotating shaft, the locking member is the most susceptible to damage, followed by the connecting member, and the rotating shaft is not susceptible to damage. If the locking member is damaged, only the locking member needs to be replaced. The locking member is a standard part, thereby reducing maintenance costs. If the connecting member is damaged, only the connecting member can be replaced without replacing the entire motor. This can reduce the maintenance cost and difficulty of the cutting device to a certain extent.

[0077] In the related art 1, the connector is a non-standard part. The middle part of the connector passes through the cutter head assembly, and the upper part is connected to the motor shaft. There are two problems with this solution: first, the connector is a non-standard part, and the replacement cost of non-standard parts is higher than that of standard parts. Second, when either the middle part or the upper part of the connector is damaged, the entire connector needs to be replaced. Compared with the related art 1, in the embodiment of the present application, when only one of the locking member 4 and the connecting member 1 is damaged, there is no need to replace the other undamaged part at the same time, which reduces the maintenance and replacement cost of the product to a certain extent. In addition, in the embodiment of the present application, the locking member 4, which is most prone to damage, is set as a standard part, such as a screw, to further save replacement costs, and when the locking member 4 is set as a standard part, the user can operate it, and the maintainability is good.

[0078] In the related technology 2, the bolt is directly connected to the motor shaft, and the two are threadedly engaged. There are two problems with this solution: one is that when the cutter head is hit, the screw thread on the motor shaft is easily damaged; the other is that the long-term looseness of the locking member will cause the screw thread on the motor shaft to be damaged. Compared with the related technology 2, the rotating shaft 2 in the embodiment of the present application is not directly connected to the locking member 4, and the thread on the rotating shaft 2 is not easily damaged when the cutting device 300 is hit, nor is it easily damaged due to the long-term looseness of the locking member 4, which reduces the possibility of having to replace the motor 200 due to damage to the rotating shaft 2, and can reduce the subsequent maintenance cost of the product to a certain extent.

[0079] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0080] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0081] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A cutting device for a lawn mower, characterized in that: include: A connecting member (1) is connected to the rotating shaft (2) and rotates along with the rotating shaft (2); A cutter disc assembly (3) comprises a cutter disc support (31) and one or more blades (32) arranged on the cutter disc support (31); A locking member (4), wherein the locking member (4) passes through the cutter disc support (31) and is connected to the connecting member (1) so as to connect the cutter disc assembly (3) to the connecting member (1) and enable the cutter disc assembly (3) to rotate synchronously with the connecting member (1).

2. The cutting device of a lawn mower according to claim 1, characterized in that: The connecting member (1) is detachably connected to the rotating shaft (2).

3. The cutting device of a lawn mower according to claim 1, characterized in that: The locking member (4) comprises a locking operating portion (41) and a rod body portion (42) connected to the locking operating portion (41); the rod body portion (42) passes through the cutter disc support (31) and is connected to the connecting member (1); and the locking operating portion (41) abuts against the bottom of the cutter disc support (31).

4. The cutting device of a lawn mower according to claim 3, characterized in that: The rod body (42) passes through the cutter head bracket (31), the rod body (42) is provided with an external thread, the connecting piece (1) is provided with an internal thread, and the rod body (42) and the connecting piece (1) are threadedly matched and connected.

5. The cutting device according to claim 1, characterized in that: The cutting device (300) further comprises a grass protection disc assembly (5), wherein the grass protection disc assembly (5) is rotatably connected to the blade disc support (31).

6. The cutting device of a lawn mower according to claim 5, characterized in that: The blade disc bracket (31) has a mounting portion for the locking member (4) to pass through, and the grass protection disc assembly (5) is rotatably connected to the mounting portion. The cutting device also includes a stopper (6), and the stopper (6) is connected to an end of the mounting portion away from the connecting member (1) to limit the grass protection disc assembly (5) between the blade disc bracket (31) and the stopper (6).

7. The cutting device of a lawn mower according to claim 5, characterized in that: The cutting device (300) further comprises a dust cover assembly (7), wherein the dust cover assembly (7) is connected to the grass protection disc assembly (5) to form a space for accommodating the locking member (4).

8. The cutting device of a lawn mower according to claim 7, characterized in that: The dust cover assembly (7) comprises a dust cover (71), the grass protection disc assembly (5) comprises a grass protection disc bracket (51), a grass protection disc (52) connected to the grass protection disc bracket (51), and a bearing assembly (53) arranged between the grass protection disc bracket (51) and the blade disc bracket (31), and the dust cover (71) is detachably connected to the grass protection disc bracket (51).

9. The cutting device of a lawn mower according to claim 1, characterized in that: The rotating shaft (2) is a motor shaft.

10. A lawn mower, comprising a motor (200) having a motor shaft, characterized in that: It also comprises a cutting device (300) of the lawn mower according to any one of claims 1 to 9 and mounted on the motor shaft.

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