Cutting system and mower

Abstract

The embodiment of the utility model provides a cutting system and a mower. The cutting system comprises a cutting device and a position adjusting device. The position adjusting device comprises a supporting arm, a support, a driving unit, a lead screw and a driving device. One end of each supporting arm is rotatably connected to the support, the other end of at least one supporting arm is connected with the lead screw, the end of the lead screw is fixedly connected with the supporting arms, the cutting device is fixedly connected with the driving device, the driving device is arranged on the lead screw in a penetrating mode, and the driving device is in threaded connection with the lead screw so that the driving device can be in threaded transmission with the lead screw. The driving unit is used for driving the supporting arm to rotate relative to the support so as to adjust the height of the cutting device to the ground. And when the driving device transversely moves relative to the screw rod, the cutting device is driven to synchronously transversely move.

Description

[0001] This application claims priority to the Chinese patent applications filed with the China Patent Office on April 9, 2024, with application number 202420724270.6 and application name “Lawn Mower” and application number 202410424006.5 and application name “Lawn Mower”, the entire contents of which are incorporated by reference in this application. Technical Field

[0002] The present application relates to the technical field of lawn mowing equipment, and in particular to a cutting system and a lawn mower. Background Art

[0003] Lawns are usually set up in some areas where people live to improve the beauty and comfort of the environment. Lawns need to be cut and maintained periodically to keep the height of the lawn from being too high. At present, lawns are usually cut and trimmed using lawn mowers. Lawn mowers can be self-moving devices. In the case of no one operating, the lawn mower can automatically complete the cutting and trimming of the lawn. However, in the prior art, the blade of the lawn mower is set at the center of the lawn mower. For lawns with physical fences set up on the periphery, when the lawn mower walks close to the physical fence, the blade cannot cut part of the lawn between the blade and the physical fence, resulting in a large area of ​​lawn remaining near the physical fence, requiring manual secondary trimming. For open lawns, when the lawn mower walks close to the lawn boundary, the blade cannot cut part of the lawn between the blade and the lawn boundary, resulting in a large area of ​​lawn remaining near the boundary, requiring manual secondary trimming. Utility Model Content

[0004] The embodiments of the present application provide a cutting system and a lawn mower, which are beneficial to improving cutting efficiency and cutting effect.

[0005] In a first aspect, an embodiment of the present application provides a cutting system for a lawn mower, wherein the cutting system comprises a cutting device and a position adjustment device, wherein the position adjustment device comprises a support arm, a support, a drive unit, a screw rod and a drive device.

[0006] One end of the support arm is rotatably connected to the support, the other end of at least one support arm is connected to a screw, the end of the screw is fixedly connected to the support arm, the cutting device is fixedly connected to the driving device, the driving device is inserted into the screw, and the driving device is threadedly connected to the screw, so that the driving device and the screw are threadedly transmitted. The driving unit is used to drive the support arm to rotate relative to the support to adjust the height of the cutting device relative to the ground. When the driving device moves horizontally relative to the screw, it drives the cutting device to move horizontally synchronously.

[0007] When the cutting system of the embodiment of the present application is applied to a lawn mower, the position adjustment device can be used to adjust the position of the cutting device through the support arm, the support, the drive unit, the screw and the drive device. Under the mutual cooperation of the support arm, the support, the drive unit, the screw and the drive device, the height of the cutting device above the ground can be adjusted, and at the same time, under the mutual cooperation of the support arm, the screw and the drive device, the cutting device can be driven to move laterally. The cutting device that has completed the lateral movement can trim the area close to the lawn boundary, which is beneficial to avoid a large area of ​​uncut lawn remaining at the lawn boundary, and is beneficial to improving the cutting efficiency and cutting effect.

[0008] In some feasible embodiments, the number of support arms is at least two, each support arm is arranged at intervals in the vertical direction, one end of each support arm can be rotatably connected to the support, the position adjustment device also includes a transverse guide member, the other end of a part of the support arms can be rotatably connected to the transverse guide member, the other end of a part of the support arms is fixedly connected to a screw rod, the sum of the number of screw rods and transverse guide members is equal to the number of support arms, and the cutting device can be slidably connected to the transverse guide member.

[0009] A connecting rod structure relationship can be formed between the support, support arm, transverse guide, screw rod and cutting device, which is beneficial to further improve the connection stability between the support, support arm, transverse guide, screw rod and cutting device and the position stability of the cutting device during rotation relative to the support arm.

[0010] In some feasible embodiments, the support arm includes a transverse connecting arm, a first sub-support arm and a second sub-support arm. The first sub-support arm is arranged on one side of the transverse connecting arm, and the second sub-support arm is arranged on the other side. The first sub-support arm is rotatably connected to the support, the transverse connecting arm is connected to the driving unit, the second sub-support arm is located on the side of the transverse connecting arm facing away from the support, and the end of the screw rod is fixedly connected to the second sub-support arm.

[0011] By applying torque to the transverse connecting arm, the support arm can be driven to rotate relative to the support, which is conducive to improving the overall structural compactness of the support arm and taking up less space. The way in which the end of the screw rod is connected to the second sub-support arm effectively ensures the connection stability and reliability between the screw rod and the support arm. The way in which the end of the transverse guide member is rotatably connected to the second sub-support arm effectively ensures the connection stability and reliability between the transverse guide member and the support arm.

[0012] In some achievable embodiments, in the support arm, the number of the second sub-support arms is two, and the two ends of the screw rod are fixedly connected to the two second sub-support arms respectively.

[0013] By applying torque to the transverse connecting arm, the support arm can be driven to rotate relative to the support, and the support arm drives the driver to move vertically. The transverse connecting arm is located between the two second sub-support arms as a force-bearing structure, which is conducive to improving the overall compactness of the support arm and occupying less space. The two ends of the screw rod are connected to the two second sub-support arms, which effectively ensures the stability and reliability of the connection between the screw rod and the support arm.

[0014] In some feasible embodiments, the number of support arms is at least two, and each support arm is arranged at intervals in the vertical direction. The position adjustment device also includes a transverse guide member. The second sub-support arms in a part of the support arms can be rotatably connected to the transverse guide member, and the second sub-support arms in a part of the support arms are fixedly connected to the screw rod. The sum of the number of screw rods and transverse guide members is equal to the number of support arms, and the cutting device can be slidably connected to the transverse guide member.

[0015] A connecting rod structure relationship can be formed between the support, support arm, transverse guide, screw rod and cutting device, which is beneficial to further improve the connection stability between the support, support arm, transverse guide, screw rod and cutting device and the position stability of the cutting device during rotation relative to the support arm.

[0016] In some feasible embodiments, in each support arm, the number of second sub-support arms is two, the two ends of the screw rod are respectively fixedly connected to the two second sub-support arms in the corresponding support arm, and the two ends of the transverse guide member are rotatably connected to the two second sub-support arms in the corresponding support arm.

[0017] The two ends of the screw rod are respectively connected to the two second sub-support arms, which effectively ensures the connection stability and reliability between the screw rod and the support arm. The two ends of the transverse guide member are rotatably connected to the two second sub-support arms, which effectively ensures the connection stability and reliability between the transverse guide member and the support arm.

[0018] In some achievable embodiments, the cutting device further comprises a sliding connection member, the sliding connection member being slidably connected to the transverse guide member, the number of the sliding connection members being two, the two sliding connections being spaced apart, and at least a portion of the driving device being located in a space formed between the two sliding connections.

[0019] The cutting device is slidably connected to the transverse guide member through a sliding connection member. The sliding connection member can be rotatably connected to the transverse guide member. The sliding connection member can be rotatably connected to the support arm through the transverse guide member. A connecting rod structure relationship can be formed between the support, the support arm, the transverse guide member, the screw rod and the sliding connection member.

[0020] At least part of the driving device is located between the two sliding connectors to effectively utilize the space between the two sliding connectors, which is beneficial to improving the compactness of the overall structure of the cutting system, reducing the overall volume, and occupying less space.

[0021] In some feasible embodiments, the sliding connector includes an axial hole and an avoidance hole, the transverse guide member is passed through the axial hole so that the sliding connector and the transverse guide member can slide together, the screw rod is passed through the avoidance hole, and the avoidance hole is used to avoid the screw rod.

[0022] The transverse guide passes through the sliding connector, which is beneficial to improve the connection stability and reliability between the transverse guide and the sliding connector, and effectively prevents the cutting device from falling off or separating from the transverse guide. The sliding connector can avoid the lead screw, avoiding position interference between the sliding connector and the lead screw when the sliding connector moves horizontally, which affects the stability of the horizontal movement of the sliding connector.

[0023] In some achievable embodiments, the position adjustment device further includes a mounting bracket, the mounting bracket is connected to the sliding connection member, and the driving device is connected to the mounting bracket.

[0024] The mounting bracket can provide a mounting base for the driving device, so as to facilitate the connection between the driving device and the cutting device.

[0025] In some achievable embodiments, the driving device includes a driving gear and a driven gear, the driving gear meshes with the driven gear for transmission, the driven gear has an internal threaded hole, and the lead screw is threadedly connected to the internal threaded hole.

[0026] In the arrangement mode in which the driving device includes a motor, a driving gear and a driven gear, since the gear transmission structure is subjected to balanced force and the transmission is stable, it is beneficial to improve the stability of the moving process of the cutting device.

[0027] A second aspect of the present application provides a cutting system for a lawn mower, wherein the cutting system comprises a cutting device and a position adjustment device.

[0028] The position adjustment device comprises a support arm, a support, a driving unit, a screw rod and a driving device.

[0029] One end of the support arm is rotatably connected to the support, and the other end of at least one support arm is connected to a screw rod, which is rotatably connected to the support arm. The screw rod is connected to a driving device, and the cutting device is threadedly connected to the screw rod, so that the cutting device and the screw rod are threadedly transmitted. The driving unit is used to drive the support arm to rotate relative to the support to adjust the height of the cutting device above the ground. The driving device is used to drive the screw rod to rotate relative to the support arm, and the screw rod drives the cutting device to move laterally.

[0030] When the cutting system of the embodiment of the present application is applied to a lawn mower, the position adjustment device can be used to adjust the position of the cutting device through the support arm, the support, the drive unit, the screw and the drive device. Under the mutual cooperation of the support arm, the support, the drive unit, the screw and the drive device, the height of the cutting device above the ground can be adjusted, and at the same time, under the mutual cooperation of the support arm, the transverse guide, the screw and the drive device, the cutting device can be driven to move laterally. The cutting device that has completed the lateral movement can trim the area close to the lawn boundary, which is beneficial to avoid a large area of ​​uncut lawn remaining at the lawn boundary, and is beneficial to improving the cutting efficiency and cutting effect.

[0031] In some feasible embodiments, the number of support arms is at least two, each support arm is arranged at intervals in the vertical direction, one end of each support arm can be rotatably connected to the support, the position adjustment device also includes a transverse guide member, the other end of a part of the support arms can be rotatably connected to the transverse guide member, the other end of a part of the support arms can be rotatably connected to the screw rod, the sum of the number of the screw rods and the transverse guide members is equal to the number of support arms, and the cutting device can be slidably connected to the transverse guide member.

[0032] A connecting rod structure relationship can be formed between the support, the support arm, the transverse guide, the screw rod and the cutting device, which is beneficial to further improve the connection stability between the support, the two support arms, the transverse guide, the screw rod and the cutting device, as well as the position stability of the cutting device during the rotation process relative to the support arm.

[0033] In some feasible embodiments, the support arm includes a transverse connecting arm, a first sub-support arm and a second sub-support arm. The first sub-support arm is arranged on one side of the transverse connecting arm, and the second sub-support arm is arranged on the other side. The first sub-support arm is rotatably connected to the support, the transverse connecting arm is connected to the driving unit, the second sub-support arm is located on the side of the transverse connecting arm facing away from the support, and the end of the screw rod is rotatably connected to the second sub-support arm.

[0034] By applying torque to the transverse connecting arm, the support arm can be driven to rotate relative to the support, which is conducive to improving the overall structural compactness of the support arm and taking up less space. The way in which the end of the screw rod is connected to the second sub-support arm effectively ensures the connection stability and reliability between the screw rod and the support arm. The way in which the end of the transverse guide member is rotatably connected to the second sub-support arm effectively ensures the connection stability and reliability between the transverse guide member and the support arm.

[0035] In some achievable embodiments, in the support arm, the number of the second sub-support arms is two, and the two ends of the screw rod are rotatably connected to the two second sub-support arms respectively.

[0036] By applying torque to the transverse connecting arm, the support arm can be driven to rotate relative to the support, and the support arm drives the driver to move vertically. The transverse connecting arm is located between the two second sub-support arms as a force-bearing structure, which is conducive to improving the overall compactness of the support arm and occupying less space. The two ends of the screw rod are connected to the two second sub-support arms, which effectively ensures the stability and reliability of the connection between the screw rod and the support arm.

[0037] In some feasible embodiments, the number of support arms is at least two, and each support arm is arranged at intervals in the vertical direction. The position adjustment device also includes a transverse guide member. The second sub-support arms in a part of the support arms can be rotatably connected to the transverse guide member. The second sub-support arms in a part of the support arms can be rotatably connected to the screw rod. The sum of the number of screw rods and transverse guide members is equal to the number of support arms. The cutting device can be slidably connected to the transverse guide member.

[0038] A connecting rod structure relationship can be formed between the support, support arm, transverse guide, screw rod and cutting device, which is beneficial to further improve the connection stability between the support, support arm, transverse guide, screw rod and cutting device and the position stability of the cutting device during rotation relative to the support arm.

[0039] In some feasible embodiments, in each support arm, the number of second sub-support arms is two, the two ends of the screw rod are rotatably connected to the two second sub-support arms in the corresponding support arm, and the two ends of the transverse guide member are rotatably connected to the two second sub-support arms in the corresponding support arm.

[0040] The two ends of the screw rod are respectively connected to the two second sub-support arms, which effectively ensures the connection stability and reliability between the screw rod and the support arm. The two ends of the transverse guide member are rotatably connected to the two second sub-support arms, which effectively ensures the connection stability and reliability between the transverse guide member and the support arm.

[0041] In some achievable embodiments, the cutting device includes an axial hole and a threaded hole, the transverse guide member is passed through the axial hole, so that the cutting device and the transverse guide member are slidably matched, and the screw rod is threadedly connected to the threaded hole.

[0042] The transverse guide member passes through the cutting device, which is beneficial to improving the connection stability and reliability between the transverse guide member and the cutting device, and effectively avoiding the situation where the cutting device falls off or separates from the transverse guide member.

[0043] The cutting device is threadedly connected to the screw rod through a threaded hole, so there is no need to set up an additional connecting structure between the cutting device and the screw rod, which is beneficial to reducing the number of parts used. At the same time, the screw rod passes through the cutting device, which is beneficial to improving the connection stability and reliability between the screw rod and the cutting device.

[0044] In some practicable embodiments, the screw rod and the drive device are connected to the same support arm. The screw rod and the drive device can move synchronously with the support arm, which reduces the difficulty of arranging the drive device and the complexity of the connection between the drive device and the support arm.

[0045] In some achievable embodiments, there are two support arms, the upper support arm is provided with a screw rod, and the lower support arm is provided with a transverse guide member.

[0046] In some achievable embodiments, in at least one support arm, the number of second sub-support arms is two, an accommodating portion is formed between the two second sub-support arms of each support arm, the screw rod is arranged corresponding to the accommodating portion, and the cutting device is passed through the accommodating portion.

[0047] The cutting device can be inserted into the accommodating portion to effectively utilize the space between the two second sub-support arms, which is beneficial to improving the compactness of the structure, reducing the overall volume, and occupying less space.

[0048] In some achievable embodiments, the cutting device includes a driver, a blade cover and a blade disc, the blade disc includes a blade, the blade cover is connected to the driver, the blade disc is arranged below the blade cover, the blade disc is connected to the output shaft of the driver, the support arm includes a housing portion, and the driver is passed through the housing portion.

[0049] The driver can be arranged through the accommodating portion to effectively utilize the space between the two second sub-support arms, which is beneficial to improving the compactness of the structure, reducing the overall volume, and occupying a small space.

[0050] In some achievable embodiments, in at least one support arm, the number of first sub-support arms is two, the two first sub-support arms of each support arm are rotatably connected to the support, and at least a portion of the drive unit is located between the two first sub-support arms.

[0051] At least a portion of the driving unit may be located between the two first sub-support arms to effectively utilize the space between the two first sub-support arms, which is beneficial to improving the compactness of the overall structure of the position adjustment device, reducing the overall volume, and occupying less space.

[0052] In some achievable embodiments, the number of supports is two, the two first sub-support arms in each support arm are rotatably connected to the two supports respectively, and at least a portion of the driving unit is located between the two supports.

[0053] At least a part of the driving unit is located between the two supports to effectively utilize the space between the two supports, which is beneficial to improving the compactness of the overall structure of the position adjustment device, reducing the overall volume, and occupying a small space.

[0054] In some achievable embodiments, the driving unit includes a cam, the cam includes a helical surface, and the transverse connecting arm abuts against the helical surface.

[0055] The spiral surface of the cam is a continuous surface, which is beneficial to improving the movement stability of the support arm relative to the support during the swinging process and reducing the possibility of impact and setback between the support arm and the cam.

[0056] A third aspect of the embodiments of the present application provides a lawn mower, which includes a cutting system.

[0057] The lawn mower of the embodiment of the present application includes a position adjustment device and a cutting device. The position adjustment device can be used to adjust the position of the cutting device through a support arm, a support, a drive unit, a screw and a drive device. Under the mutual cooperation of the support arm, the support, the drive unit, the screw and the drive device, the height of the cutting device above the ground can be adjusted, and at the same time, under the mutual cooperation of the support arm, the screw and the drive device, the cutting device can be driven to move laterally. The cutting device that completes the lateral movement can trim the area close to the lawn boundary, which is beneficial to avoid a large area of ​​uncut lawn remaining at the lawn boundary, and is beneficial to improving the cutting efficiency and cutting effect.

[0058] A fourth aspect of the embodiments of the present application provides a lawn mower. The lawn mower includes a body and a cutting system. The cutting system includes a cutting device and a position adjustment device. The position adjustment device includes a support arm, a support, a drive unit, a screw and a drive device.

[0059] One end of the support arm is rotatably connected to the support, the other end of at least one support arm is connected to a screw, the end of the screw is fixedly connected to the support arm, the cutting device is fixedly connected to the driving device, the driving device is inserted into the screw, and the driving device is threadedly connected to the screw, so that the driving device and the screw are threadedly transmitted. The driving unit is used to drive the support arm to rotate relative to the support to adjust the height of the cutting device relative to the ground. When the driving device moves laterally relative to the screw, it drives the cutting device to move laterally relative to the fuselage synchronously.

[0060] The lawn mower of the embodiment of the present application includes a position adjustment device and a cutting device. The position adjustment device can be used to adjust the position of the cutting device through a support arm, a support, a drive unit, a screw and a drive device. Under the mutual cooperation of the support arm, the support, the drive unit, the screw and the drive device, the height of the cutting device above the ground can be adjusted, and at the same time, under the mutual cooperation of the support arm, the screw and the drive device, the cutting device can be driven to move laterally. The cutting device that completes the lateral movement can trim the area close to the lawn boundary, which is beneficial to avoid a large area of ​​uncut lawn remaining at the lawn boundary, and is beneficial to improving the cutting efficiency and cutting effect.

[0061] A fifth aspect of the embodiments of the present application provides a lawn mower, which includes a body and a cutting system.

[0062] The cutting system comprises a cutting device and a position adjusting device, wherein the position adjusting device comprises a supporting arm, a support, a driving unit, a screw rod and a driving device.

[0063] One end of the support arm is rotatably connected to the support, and the other end of at least one support arm is connected to a screw rod, which is rotatably connected to the support arm. The screw rod is connected to a driving device. The cutting device is threadedly connected to the screw rod so that threaded transmission is achieved between the cutting device and the screw rod. The driving unit is used to drive the support arm to rotate relative to the support to adjust the height of the cutting device relative to the ground. The driving device is used to drive the screw rod to rotate relative to the support arm, and the screw rod drives the cutting device to move laterally relative to the fuselage.

[0064] The lawn mower of the embodiment of the present application includes a position adjustment device and a cutting device. The position adjustment device can be used to adjust the position of the cutting device through a support arm, a support, a drive unit, a screw and a drive device. Under the mutual cooperation of the support arm, the support, the drive unit, the screw and the drive device, the height of the cutting device above the ground can be adjusted, and at the same time, under the mutual cooperation of the support arm, the screw and the drive device, the cutting device can be driven to move laterally. The cutting device that completes the lateral movement can trim the area close to the lawn boundary, which is beneficial to avoid a large area of ​​uncut lawn remaining at the lawn boundary, and is beneficial to improving the cutting efficiency and cutting effect.

[0065] In some achievable embodiments, the cutting device includes a blade, and the driving device drives the cutting device to move laterally, and the cutting device drives the blade to move laterally synchronously, so that at least a portion of the blade moves outside the positive projection of the fuselage toward the ground.

[0066] When the cutting device moves horizontally, at least part of the blade is located outside the orthographic projection of the body toward the ground. The blade can be moved to the outside of the body of the lawn mower, and when working, the grass in the lawn boundary area can be cut cleanly, avoiding lawn boundary residue during the cutting process, eliminating the need for manual secondary trimming, and improving the user experience.

[0067] In some practicable ways, a part of the screw rod extends out of the orthographic projection of the fuselage toward the ground. Therefore, when the cutting device moves laterally, at least part of the blade is located outside the orthographic projection of the fuselage toward the ground.

[0068] When the border of the lawn needs to be trimmed, the cutting device moves along the lead screw to the outside of the body of the lawn mower, so that the area of ​​the blade moving to the outside of the lawn mower is increased, further improving the trimming effect of the lawn border.

[0069] In some feasible embodiments, the cutting device includes a blade, and a driving device drives the cutting device to move laterally. The cutting device drives the blade to move laterally within the orthographic projection of the fuselage toward the ground, and the minimum horizontal distance between the outer edge of the blade and the side edge of the orthographic projection of the fuselage toward the ground is greater than or equal to 0 mm and less than or equal to 50 mm.

[0070] When the width of the lawn edge that cannot be cut is greater than 50 mm, it will affect the visual appearance and require manual re-trimming, affecting the user experience. The minimum horizontal distance between the outer edge of the blade and the side edge of the body's positive projection is greater than or equal to 0 mm and less than or equal to 50 mm, which greatly reduces the width of the uncut lawn, eliminates the need for manual secondary trimming, and improves the edge cutting effect. In addition, the blade is located inside the body, and no additional protective structure is required to meet safety requirements.

[0071] A sixth aspect of the embodiments of the present application provides a lawn mower, which includes a body and a cutting system.

[0072] The machine body includes a first lower edge. The cutting system is arranged on the machine body. The cutting system includes a cutting device and a position adjustment device. The position adjustment device includes a support arm, a support, a driving unit, a screw rod and a driving device.

[0073] One end of the support arm is rotatably connected to the support, the other end of at least one support arm is connected to the screw rod, the end of the screw rod is fixedly connected to the support arm, and the cutting device is fixedly connected to the driving device. The driving device is inserted into the screw rod, and the driving device is threadedly connected to the screw rod, so that the driving device and the screw rod are threadedly transmitted.

[0074] The driving unit is used to drive the support arm to rotate relative to the support to adjust the height of the cutting device relative to the ground. When the driving device moves laterally relative to the screw rod, it drives the cutting device to move laterally relative to the fuselage synchronously, so that the cutting device moves between the center position of the fuselage and the side cutting position of the fuselage.

[0075] The cutting device comprises a blade disc and a blade disc cover. The blade disc is located in the blade disc cover. The blade disc comprises a blade. The blade disc cover has a second lower edge. When the cutting device is located at the edge cutting position, along the vertical direction, the second lower edge is lower than the first lower edge, and the second lower edge is lower than the lower surface of the blade.

[0076] The lawn mower of the embodiment of the present application includes a position adjustment device and a cutting device. The position adjustment device can be used to adjust the position of the cutting device through a support arm, a support, a drive unit, a screw and a drive device. Under the mutual cooperation of the support arm, the support, the drive unit, the screw and the drive device, the height of the cutting device above the ground can be adjusted, and at the same time, under the mutual cooperation of the support arm, the screw and the drive device, the cutting device can be driven to move laterally. The cutting device that completes the lateral movement can trim the area close to the lawn boundary, which is beneficial to avoid a large area of ​​uncut lawn remaining at the lawn boundary, and is beneficial to improving the cutting efficiency and cutting effect.

[0077] A seventh aspect of the embodiments of the present application provides a lawn mower, which includes a body and a cutting system.

[0078] The body includes a first lower edge.

[0079] The cutting system is arranged on the machine body and comprises a cutting device and a position adjusting device.

[0080] The position adjustment device comprises a support arm, a support, a driving unit, a screw rod and a driving device.

[0081] One end of the support arm is rotatably connected to the support, the other end of at least one support arm is connected to a screw rod, the screw rod is rotatably connected to the support arm, and the screw rod is connected to the driving device. The cutting device is threadedly connected to the screw rod, so that the cutting device and the screw rod are threadedly transmitted.

[0082] The driving unit is used to drive the support arm to rotate relative to the support to adjust the height of the cutting device relative to the ground. The driving device is used to drive the screw to rotate relative to the support arm. The screw drives the cutting device to move laterally relative to the fuselage, so that the cutting device moves between the center position of the fuselage and the side cutting position of the fuselage.

[0083] The cutting device comprises a blade disc and a blade disc cover. The blade disc is located in the blade disc cover. The blade disc comprises a blade. The blade disc cover has a second lower edge. When the cutting device is located at the edge cutting position, along the vertical direction, the second lower edge is lower than the first lower edge, and the second lower edge is lower than the lower surface of the blade.

[0084] The lawn mower of the embodiment of the present application includes a position adjustment device and a cutting device. The position adjustment device can be used to adjust the position of the cutting device through a support arm, a support, a drive unit, a screw and a drive device. Under the mutual cooperation of the support arm, the support, the drive unit, the screw and the drive device, the height of the cutting device above the ground can be adjusted, and at the same time, under the mutual cooperation of the support arm, the transverse guide, the screw and the drive device, the cutting device can be driven to move laterally. The cutting device that completes the lateral movement can trim the area close to the lawn boundary, which is beneficial to avoid a large area of ​​uncut lawn remaining at the lawn boundary, and is beneficial to improving the cutting efficiency and cutting effect.

[0085] In addition, in the lawn mower of the embodiment of the present application, the position adjustment device can adjust the height of the cutting device, so that the second lower edge of the blade cover can be lower than the first lower edge of the body, and the second lower edge of the blade cover can be lower than the lower surface of the blade. There is a large safety distance between the second lower edge of the blade cover and the blade. When the lawn mower is being carried, the operator's palm can be placed on the body, and the fingertips of the fingers can be buckled into the inside of the blade cover. Under the protective effect of the blade cover, most of the operator's fingers are located on the outside of the blade cover, making it difficult for the operator's fingers to touch the blade. At the same time, the second lower edge of the blade cover is lower than the blade, so that when the operator's fingers bypass the second lower edge of the blade cover and buckle into the inside of the blade cover, the fingertips of the fingers are not likely to touch the blade.

[0086] In addition, the lawn mower of the embodiment of the present application can meet the safety requirements of transportation. Therefore, the distance between the blade disc and the body can be adjusted to be very small, and the outer edge of the blade disc cover can be infinitely close to the body, which greatly reduces the width of the uncut lawn and improves the edge cutting effect.

[0087] Since the outer edge of the cutter head cover can be infinitely close to the fuselage, most hard impurities (such as pebbles) cannot enter between the cutter head cover and the fuselage, thus preventing the cutter head cover or the fuselage from being scratched or damaged by the hard impurities.

[0088] In addition, the lawn mower in the embodiment of the present application does not need to be equipped with a bottom protective plate at the bottom of the blade disc, thereby avoiding the blade disc from getting stuck due to pebbles or other debris getting stuck between the bottom protective plate and the blade disc during mowing, reducing the probability of the machine getting stuck while the lawn mower is cutting, and improving cutting efficiency and user experience.

[0089] Therefore, the lawn mower of the embodiment of the present application can not only effectively cut the lawn near the lawn boundary, improve the cutting efficiency and cutting effect, but also adjust the position of the cutting device through the position adjustment device so that the cutting device can meet the use requirements of the lawn mower.

[0090] In some achievable embodiments, the fuselage includes a side skirt panel, and when the cutting device is in the edge cutting position, a minimum horizontal distance between an outer edge of the blade and the side skirt panel along a direction perpendicular to the side skirt panel is greater than or equal to 10 mm and less than or equal to 50 mm.

[0091] In the edge cutting state, the minimum horizontal distance between the outer edge of the blade and the side skirt of the body is greater than or equal to 10 mm and less than or equal to 50 mm. When the minimum horizontal distance between the outer edge of the blade and the side skirt of the body is greater than 50 mm, the width of the area on the edge of the lawn that cannot be cut will affect the visual appearance and require manual re-trimming, affecting the user experience. When the minimum horizontal distance between the outer edge of the blade and the side skirt of the body is less than 10 mm, when the user is carrying the mowing, the fingers are easily touched by mistake when they buckle from the lower edge of the side skirt into the body, causing injury to the user. When the minimum horizontal distance between the outer edge of the blade and the side skirt of the body is greater than or equal to 10 mm and less than or equal to 50 mm, while meeting the safety performance, the width of the uncut lawn is greatly reduced, and no manual secondary trimming is required, which improves the edge cutting effect.

[0092] In some practicable embodiments, the fuselage includes a side skirt panel. When the cutting device is at the center of the fuselage, the minimum horizontal distance between the outer edge of the blade and the side skirt panel of the fuselage along a direction perpendicular to the side skirt panel is D.

[0093] When the cutting device is in the side cutting position of the fuselage, the minimum horizontal distance between the outer edge of the blade and the side skirt of the fuselage in the direction perpendicular to the side skirt is d. The value of D is greater than the value of d.

[0094] The lawn mower in the embodiment of the present application has two working positions. According to different usage scenarios, the cutting device can be adjusted to the center position of the body or the side cutting position of the body to meet the different mowing needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0096] Figure 1 A schematic diagram of a partial structure of a lawn mower according to an embodiment of the present application;

[0097] Figure 2 A partial side structural schematic diagram of a cutting system according to an embodiment of the present application;

[0098] Figure 3A schematic diagram of a partial bottom view of the cutting system according to an embodiment of the present application;

[0099] Figure 4 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0100] Figure 5 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0101] Figure 6 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0102] Figure 7 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0103] Figure 8 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0104] Fig. 9 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0105] Fig.10 A schematic diagram of a partial structure of a lawn mower according to an embodiment of the present application;

[0106] Fig.11 A schematic diagram of a partial structure of a lawn mower according to an embodiment of the present application;

[0107] Fig.12 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0108] Fig.13 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0109] Fig.14 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0110] Fig.15 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0111] Fig.16 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0112] Fig.17 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0113] Fig.18 A schematic diagram of a partial structure of a cutting system according to an embodiment of the present application;

[0114] Fig.19 It is a schematic diagram of the partial structure of a cutting system according to an embodiment of the present application.

[0115] Description of reference numerals:

[0116] 10. Lawn mower;

[0117] 20. Cutting system;

[0118] 30. fuselage; 31. side skirt; 311. first lower edge;

[0119] 40. Cutting device;

[0120] 41. Driver;

[0121] 42. knife disc; 421. blade;

[0122] 43, blade cover; 43a, second lower edge; 431, flange;

[0123] 44. Sliding connector;

[0124] 50. Position adjustment device;

[0125] 60. Height adjustment assembly;

[0126] 61. Support;

[0127] 62, support arm; 62a, accommodating portion; 62b, first connecting portion; 62c, second connecting portion;

[0128] 621, transverse connecting arm; 622, first sub-support arm; 623, second sub-support arm;

[0129] 63, cam; 631, helicoid;

[0130] 64. Transverse guide;

[0131] 70. Screw rod;

[0132] 80, horizontal axis;

[0133] 90. Walking device;

[0134] 100, driving device; 110, driving gear; 120, driven gear;

[0135] 200, mounting bracket;

[0136] X, horizontal;

[0137] Y, vertical direction;

[0138] Z, direction of travel. DETAILED DESCRIPTION

[0139] The lawn mower of the embodiment of the present application is a self-moving device that can automatically cut the lawn. The lawn mower can automatically cut the lawn without human operation. The lawn mower can walk on the lawn along a predetermined route during operation. During the walking process, the lawn mower can perform a mowing function to cut the lawn so that the lawn is kept at a predetermined height, avoiding the lawn from being too high or having different heights, and ensuring that the lawn maintains good beauty and neatness.

[0140] The lawn mower is usually placed in a predetermined area to perform lawn mowing. For example, a physical fence may be set around the lawn. For example, the physical fence may be a wire mesh or a wooden fence. The physical fence is set around the lawn along the boundary of the lawn. The lawn mower may be placed within the physical fence. The lawn mower may mow the lawn within the physical fence.

[0141] For another example, a lawn mower may be placed in an open lawn area. An open lawn area refers to a lawn area without a physical fence. In order to ensure that the lawn mower does not go out of the lawn area, the lawn mower may include a control system, and the control system may automatically set a walking route of the lawn mower according to the boundary shape of the lawn, so that the lawn mower always walks in a predetermined lawn area and mows the lawn at the same time. The lawn mower cannot go out of the boundary of the lawn.

[0142] Figure 1 The partial structure of the lawn mower is shown schematically. Figure 2 The partial side view structure of the cutting system is schematically shown. Figure 3 The schematic diagram shows the partial structure of the cutting system from above.

[0143] See also Figure 1 , Figure 2 and Figure 3 As shown, the lawn mower 10 includes a cutting system 20. The cutting system 20 includes a cutting device 40. The cutting device 40 includes a driver 41 and a cutter disc 42 for cutting the lawn. The cutter disc 42 includes a blade 421. The driver 41 is connected to the cutter disc 42. The driver 41 is used to drive the cutter disc 42 to rotate. The cutter disc 42 in a rotating state can cut the lawn to reduce the height of the lawn. The rotation axis of the cutter disc 42 is a vertical axis. Alternatively, there is a small angle between the rotation axis of the cutter disc 42 and the vertical direction Y. A predetermined distance is maintained between the cutter disc 42 and the ground, so that the cutter disc 42 can cut the lawn according to the mowing height requirement.

[0144] The lawn mower 10 further includes a body 30 and a running device 90. The cutting device 40 may be arranged on the inner side of the body 30. For example, along the vertical direction Y, the cutting device 40 may be arranged below the body 30. Along the vertical direction Y, the orthographic projection of the cutting device 40 may be located within the orthographic projection of the body 30. The running device 90 includes running wheels or tracks. The running wheels or tracks may be located outside the body 30. Along the lateral direction X of the lawn mower 10, running wheels or tracks are respectively arranged on both sides of the lawn mower 10. The lateral direction X of the lawn mower 10 is a horizontal direction perpendicular to the travel direction Z of the lawn mower 10. The lateral direction X of the lawn mower 10 is perpendicular to the vertical direction Y. It should be noted that along the lateral direction X of the lawn mower 10, the two sides of the lawn mower 10 refer to the left and right sides of the lawn mower 10.

[0145] In the related art, the blade of the lawn mower is set at the center of the lawn mower. For lawns with physical fences set around them, when the lawn mower moves close to the physical fence, the blade cannot cut the part of the lawn between the blade and the physical fence, resulting in a large area of ​​lawn remaining near the physical fence, which requires manual secondary mowing. For open lawns, when the lawn mower moves close to the lawn boundary, the blade cannot cut the part of the lawn between the blade and the lawn boundary, resulting in a large area of ​​lawn remaining near the boundary, which requires manual secondary mowing.

[0146] In order to solve the above problem, one way is that the lawn mower can be provided with a lateral position adjustment device. The cutting device is connected to the lateral position adjustment device. The lateral position adjustment device can adjust the lateral relative position of the cutting device and the machine body, so that the cutting device can move from the center position to the outer edge of the machine body to the side cutting position, or from the side cutting position to the center of the machine body to the center position. When the cutting device is in the side cutting position, the cutting device can trim the area close to the lawn boundary, which is conducive to avoiding manual secondary trimming.

[0147] However, due to the limitation of the body volume, it is difficult for a lawn mower with a lateral position adjustment device to be compatible with a height position adjustment device inside the body. The height position adjustment device is a mechanism for adjusting the height of the cutting device so that the blade disc can complete the cutting of lawns at different heights. The problem of motion interference must be considered when arranging the lateral position adjustment device and the height position adjustment device together inside the body of the lawn mower. Therefore, a large internal space of the body is required to accommodate the lateral position adjustment device and the height position adjustment device. The lawn mower is required to be small in size and light in weight, which also makes it difficult for the above two position adjustment devices to be integrated inside the lawn mower. For lawn mowers, there is currently a lack of specific means to achieve both the lateral position adjustment and the height position adjustment functions of the blade disc.

[0148] For lawn mowers whose cutting device position can be moved and adjusted or whose cutting device is located on one side of the body, when the cutting device of the lawn mower is in the side cutting position, the lawn mower needs to meet the use requirements. For example, when the cutting device is in the side cutting position, when people carry the lawn mower, their fingers cannot touch the blade disc to meet the use requirements. In order to meet the use requirements, side guard plates and bottom guard plates are provided on the body of the lawn mower. When the cutting device is in the side cutting position, a part of the cutting device can be located in the space surrounded by the side guard plates and the bottom guard plates. The side guard plates and the bottom guard plates protect the cutting device so that it is not easy for people's fingers to touch the blade disc to ensure the safety of the lawn mower. However, when the lawn mower is moving, the bottom guard plate will crush the lawn, causing the cutting device to fail to cut the crushed lawn, affecting the cutting efficiency and cutting effect.

[0149] The lawn mower 10 of the embodiment of the present application can realize the function of lateral movement of the cutting device 40, and can also realize the function of vertical movement of the cutting device 40. The lawn mower 10 adjusts the position of the cutting device 40 laterally so that the cutting device 40 can trim a portion of the lawn near the lawn boundary. At the same time, the lawn mower 10 adjusts the position of the cutting device 40 vertically so that when the cutting device 40 is in the side cutting position, the lawn mower 10 meets the use requirements. The lawn mower 10 does not need to be additionally provided with a bottom protection plate, which is conducive to improving cutting efficiency and cutting effect.

[0150] Figure 4 A partial structure of the cutting system 20 is schematically shown. Figure 4 In the embodiment, the cutting device 40 in the cutting system 20 is in the central position. Figures 1 to 4 The lawn mower 10 according to the embodiment of the present application is described by way of example.

[0151] See also Figures 1 to 4 As shown, the lawn mower 10 of the embodiment of the present application may include a body 30. The body 30 includes a storage space. The body 30 may protect the components disposed in the storage space. The body 30 may include side skirts 31. Along the lateral direction X of the lawn mower 10, the side skirts 31 are respectively disposed on both sides of the lawn mower 10. The side skirts 31 have a first lower edge 311. Along the vertical direction Y, the first lower edge 311 of the side skirt 31 faces the ground.

[0152] The lawn mower 10 may include a cutting system 20. The cutting system 20 is disposed on a body 30. The body 30 provides a mounting base for the cutting system 20 and carries the cutting system 20. Exemplarily, along the vertical direction Y, the cutting system 20 may be disposed below the body 30. The cutting system 20 includes a cutting device 40 and a position adjustment device 50. The cutting device 40 and the position adjustment device 50 are both disposed on the body 30. The cutting device 40 is connected to the position adjustment device 50. The position adjustment device 50 is used to drive the cutting device 40 to move laterally to approach or move away from the side skirt 31, and the position adjustment device 50 is used to drive the cutting device 40 to move vertically along the vertical direction Y. The position adjustment device 50 has the function of driving the cutting device 40 to move laterally and vertically.

[0153] The position adjustment device 50 can drive the cutting device 40 to move horizontally and then drive the cutting device 40 to move vertically. Alternatively, the position adjustment device 50 can drive the cutting device 40 to move vertically and then drive the cutting device 40 to move horizontally. Alternatively, the position adjustment device 50 can drive the cutting device 40 to move horizontally and vertically at the same time.

[0154] The position adjustment device 50 is used to drive the cutting device 40 to move laterally to approach or move away from the side skirt panel 31, so that the cutting device 40 switches between the center position of the fuselage 30 and the side cutting position of the fuselage 30. The position adjustment device 50 is used to drive the cutting device 40 to move vertically, so that the cutting device 40 approaches or moves away from the ground, thereby adjusting the height of the cutting device 40.

[0155] When the cutting device 40 is at the center of the fuselage 30, the cutting device 40 is relatively far away from the side skirt panels 31 of the fuselage 30. The distance between the cutting device 40 and the side skirt panels 31 is relatively large. When the cutting device 40 is at the edge cutting position of the fuselage 30, the cutting device 40 is relatively close to the side skirt panels 31 of the fuselage 30. The distance between the cutting device 40 and the side skirt panels 31 is relatively small.

[0156] In some practicable embodiments, along the vertical direction Y, the orthographic projection of the cutting system 20 is located within the orthographic projection of the fuselage 30. When the cutting device 40 is at the edge cutting position of the fuselage 30, the cutting device 40 does not exceed the side skirt 31 of the fuselage 30 along the lateral direction X of the mower 10.

[0157] In some practicable embodiments, in an initial state, the cutting device 40 of the lawn mower 10 is located at the center of the body 30. After the lawn mower 10 is started, the cutting device 40 of the lawn mower 10 can mow most of the lawn, and only the lawn near the edge of the lawn cannot be mowed. Then, the position adjustment device 50 is started to drive the cutting device 40 to move laterally from the center position to the side cutting position, and then the lawn near the edge is mowed, thereby completing the mowing of the entire lawn.

[0158] Alternatively, in the initial state, the cutting device 40 of the lawn mower 10 is located at the edge cutting position. After the lawn mower 10 is started, the cutting device 40 of the lawn mower 10 can cut the lawn near the border. Then, the position adjustment device 50 is started to drive the cutting device 40 to move laterally from the edge cutting position to the center position, and cut the remaining majority of the lawn, thereby completing the cutting work of the entire lawn.

[0159] In some practicable embodiments, when the position adjustment device 50 drives the cutting device 40 to move, the cutting device 40 can be in a stopped working state or in a working state.

[0160] In some practicable embodiments, when the position adjustment device 50 needs to drive the cutting device 40 to move laterally from the center position to the side cutting position, the position adjustment device 50 drives the cutting device 40 to move vertically in advance to lower the height of the cutting device 40. Then, the position adjustment device 50 drives the cutting device 40 to move laterally to the side cutting position.

[0161] When the position adjustment device 50 needs to drive the cutting device 40 to move horizontally from the edge cutting position to the center position, the position adjustment device 50 drives the cutting device 40 to move horizontally to the center position in advance. Then, the position adjustment device 50 drives the cutting device 40 to move vertically to increase the height of the cutting device 40.

[0162] In some practicable embodiments, a limiting structure (not shown) is provided on the fuselage 30. When the cutting device 40 is located at the edge cutting position, the limiting structure is used to limit the maximum upward stroke of the cutting device 40 to prevent the height of the cutting device 40 from exceeding a set range when the cutting device 40 is at the edge cutting position.

[0163] In some practicable ways, lawns in different areas have different requirements for lawn mowing heights. The position adjustment device 50 drives the cutting device 40 to move vertically along the vertical direction Y, so that the height of the cutting device 40 can be flexibly adjusted, thereby adapting to and meeting the differentiated requirements for lawn mowing heights.

[0164] See also Figures 1 to 3As shown, the cutting device 40 of the embodiment of the present application includes a blade disc 42 and a blade disc cover 43. The blade disc 42 is arranged in the blade disc cover 43. The blade disc 42 is located below the blade disc cover 43. Exemplarily, the material of the blade disc cover 43 can be plastic. The material of the blade disc 42 can be metal. The blade disc cover 43 includes a bottom opening that avoids the blade disc 42. The size of the bottom opening is larger than the diameter of the blade disc 42. The bottom opening of the blade disc cover 43 completely avoids the blade disc 42, so that along the vertical direction Y, the bottom of the blade disc 42 is not blocked by the blade disc cover 43. The lawn can also enter the blade disc cover 43 through the bottom opening and be cut by the blade disc 42 in the blade disc cover 43. Therefore, the blade disc cover 43 will not overwhelm the lawn, ensuring that the blade disc 42 can smoothly cut the lawn. Improve cutting efficiency and cutting effect.

[0165] In some achievable embodiments, the blade cover 43 has a second lower edge 43a. Along the vertical direction Y, the second lower edge 43a of the blade cover 43 faces the ground. When the cutting device 40 is in the side cutting position, along the vertical direction Y, the second lower edge 43a of the blade cover 43 near the side skirt 31 is lower than the first lower edge 311, and the second lower edge 43a is lower than the blade 42. When the lawn mower 10 is observed from the side along the lateral direction X of the lawn mower 10, the portion of the blade cover 43 that is not blocked by the side skirt 31 can be observed, but the blade 42 blocked by the blade cover 43 cannot be observed.

[0166] For example, when the lawn mower 10 is viewed from above, along the lateral direction X of the lawn mower 10, when the cutting device 40 is in the side cutting position, the cutting device 40 may be disposed toward the left side of the lawn mower 10. Along the vertical direction Y, the second lower edge 43a of the blade cover 43 close to the left side skirt plate 31 may be lower than the first lower edge 311 of the left side skirt plate 31.

[0167] In some achievable embodiments, along the vertical direction Y, the blade cover 43 may be entirely located outside the body 30. When the lawn mower 10 is viewed from the side, the side skirt 31 does not block the blade cover 43. Alternatively, along the vertical direction Y, a portion of the blade cover 43 may be located outside the body 30, and a portion may be located inside the body 30. When the lawn mower 10 is viewed from the side, the side skirt 31 blocks a portion of the blade cover 43.

[0168] In some possible implementations, see Figure 2 and Figure 3As shown, the blade cover 43 may include two flanges 431. The flanges 431 may be folded toward the ground. The flanges 431 have a second lower edge 43a. The two flanges 431 are arranged at intervals along the transverse direction X of the lawn mower 10. Along the transverse direction X of the lawn mower 10, the flanges 431 are arranged corresponding to the side skirts 31. The flange 431 on the left side is arranged corresponding to the side skirt 31 on the left side. The flange 431 on the right side is arranged corresponding to the side skirt 31 on the right side. When the cutting device 40 moves along the transverse direction X of the lawn mower 10, the flange 431 of the blade cover 43 approaches or moves away from the side skirt 31. The blade 42 is arranged in the space between the two flanges 431. Along the travel direction Z of the lawn mower 10, the blade cover 43 has a grass inlet. The lawn can enter the blade cover 43 through the grass inlet, so the blade cover 43 will not overwhelm the lawn.

[0169] In some possible implementations, see Figure 2 and Figure 4 As shown, the cutting device 40 further includes a driver 41. The driver 41 is connected to a position adjustment device 50. The blade cover 43 can be connected to the driver 41. The output shaft of the driver 41 is connected to the blade 42. The position adjustment device 50 can drive the cutting device 40 to move horizontally or vertically as a whole, that is, the position adjustment device 50 can drive the driver 41, the blade cover 43 and the blade 42 to move horizontally or vertically synchronously.

[0170] In some examples, the driver 41 may include a housing, a motor, and a transmission mechanism. The blade cover 43 may be connected to the housing. The motor is disposed in the housing. The transmission mechanism includes an output shaft that passes through the housing. The portion of the transmission mechanism other than the output shaft is disposed in the housing. The housing may protect the motor and the transmission structure. Exemplarily, the transmission mechanism includes a gear-type speed change structure.

[0171] The lawn mower 10 of the embodiment of the present application includes a position adjustment device 50 and a cutting device 40. The position adjustment device 50 can adjust the relative position of the cutting device 40 and the body 30. Under the driving action of the position adjustment device 50, the cutting device 40 can switch between the center position and the side cutting position. When the cutting device 40 is in the side cutting position, the cutting device 40 can trim the area close to the lawn boundary, which is beneficial to avoid that too large an area of ​​uncut lawn remains at the lawn boundary. At the same time, the lawn mower 10 protects the blade 42 through the blade cover 43, and there is no need to set up an additional bottom protective plate. The blade cover 43 of the lawn mower 10 will not overwhelm the lawn, which is beneficial to improve the cutting efficiency and cutting effect.

[0172] In addition, the position adjustment device 50 can adjust the height of the cutting device 40, so that when the cutting device 40 is located at the side cutting position, along the vertical direction Y, the second lower edge 43a of the blade cover 43 can be lower than the first lower edge 311 of the side skirt 31, and the second lower edge 43a of the blade cover 43 can be lower than the blade 42. There is a large safety distance between the second lower edge 43a of the blade cover 43 and the blade 42. When the lawn mower 10 is being carried, the palm of the operator can be placed on the side skirt 31, and the fingertips of the fingers can be buckled inside the blade cover 43. Under the protective effect of the blade cover 43, most of the operator's fingers are located outside the blade cover 43, so that the operator's fingers are not easy to touch the blade 42. At the same time, the second lower edge 43a of the blade cover 43 is lower than the blade 42, so that when the operator's fingers bypass the second lower edge 43a of the blade cover 43 and buckle inside the blade cover 43, the fingertips of the fingers are not easy to touch the blade 42.

[0173] In addition, the lawn mower 10 of the embodiment of the present application can meet the transportation safety requirements under the condition that the orthographic projection of the cutting system 20 is located within the orthographic projection of the fuselage 30. Therefore, when the cutting device 40 is in the side cutting position, the distance between the blade disc 42 and the side skirt 31 can be adjusted to be very small, and the outer edge of the blade disc cover 43 can be infinitely close to the side skirt 31, which greatly reduces the width of the uncut lawn and improves the side cutting effect.

[0174] Since the outer edge of the blade cover 43 can be infinitely close to the side skirt plate 31, most hard impurities (such as pebbles) cannot enter between the blade cover 43 and the side skirt plate 31, thus preventing the hard impurities from scratching or damaging the blade cover 43 or the side skirt plate 31.

[0175] In addition, the lawn mower 10 of the embodiment of the present application does not need to be provided with a bottom protective plate at the bottom of the blade disc 42, thereby preventing pebbles or other debris from getting stuck between the bottom protective plate and the blade disc 42 during mowing, causing the blade disc 42 to get stuck, thereby reducing the probability of the lawn mower 10 getting stuck while cutting, and improving the cutting efficiency and user experience.

[0176] Therefore, the lawn mower 10 of the embodiment of the present application can not only effectively cut the lawn near the lawn boundary, improve the cutting efficiency and cutting effect, but also adjust the position of the cutting device 40 through the position adjustment device 50 so that the cutting device 40 located at the edge cutting position can meet the use requirements of the lawn mower 10.

[0177] In some achievable embodiments, along the vertical direction Y, the vertical distance between the first lower edge 311 of the side skirt plate 31 and the second lower edge 43a of the blade cover 43 is greater than or equal to 10 millimeters (mm). The larger the vertical distance between the first lower edge 311 of the side skirt plate 31 and the second lower edge 43a of the blade cover 43, the higher the protective performance of the side skirt plate 31 and the blade cover 43, so that the operator's fingers are less likely to contact the blade 42.

[0178] In some achievable embodiments, the minimum vertical distance between the blade disc 42 and the second lower edge 43a of the blade disc cover 43 along the vertical direction Y is in the range of 3 mm to 15 mm. For example, the vertical distance between the blade disc 42 and the second lower edge 43a of the blade disc cover 43 is 10 mm. The greater the vertical distance between the blade disc 42 and the second lower edge 43a of the blade disc cover 43, the greater the distance between the operator's finger that is buckled into the blade disc cover 43 and the blade disc 42, so that the operator's finger is less likely to contact the blade disc 42.

[0179] In some achievable embodiments, the vertical distance between the first lower edge 311 of the side skirt panel 31 and the ground is in the range of 40 mm to 60 mm along the vertical direction Y. For example, the vertical distance between the first lower edge 311 of the side skirt panel 31 and the ground is 55 mm.

[0180] In some practicable embodiments, along the vertical direction Y, the vertical distance between the cutter head 42 and the ground ranges from 30 mm to 40 mm.

[0181] See also Figure 4 As shown, the position adjustment device 50 of the embodiment of the present application includes a height adjustment component 60. The height adjustment component 60 is disposed on the fuselage 30. The cutting device 40 is connected to the height adjustment component 60. The height adjustment component 60 is used to drive the cutting device 40 to move vertically in the vertical direction Y to adjust the height of the cutting device 40.

[0182] The height adjustment assembly 60 may include a support 61. The support 61 may be disposed on the fuselage 30. The support 61 may be used to carry the cutting system 20. Exemplarily, the support 61 may be integrally formed with the fuselage 30. Alternatively, the support 61 may be detachably connected to the fuselage 30.

[0183] The height adjustment assembly 60 may further include a support arm 62. The support arm 62 is rotatably connected to the fuselage 30. Exemplarily, the support arm 62 may be connected to the fuselage 30 via a support 61. The support arm 62 is rotatably connected to the support 61. The way in which the support arm 62 is connected to the fuselage 30 via the support 61 is conducive to reducing the difficulty of connecting the support arm 62 and the fuselage 30. Exemplarily, the support arm 62 may be rotatably connected to the support 61. Exemplarily, the support arm 62 may be rotatably connected to the support 61 via a horizontal axis 80. The height adjustment assembly 60 may drive the support arm 62 to swing around the horizontal axis 80. The horizontal axis 80 is the fulcrum of the support arm 62. The way in which the support arm 62 and the support 61 are connected via the horizontal axis 80 is conducive to reducing the difficulty of structural design and disassembly and assembly of the rotating pair formed between the support arm 62 and the support 61, and reducing the processing cost and maintenance cost.

[0184] Exemplarily, a horizontal shaft 80 is provided on the support arm 62. A shaft hole is correspondingly provided on the support 61. The horizontal shaft 80 of the support arm 62 is inserted into the shaft hole of the support 61. Alternatively, a shaft hole is provided on the support arm 62. The horizontal shaft 80 is correspondingly provided on the support 61. The shaft hole of the support arm 62 is sleeved on the horizontal shaft 80 of the support 61. Alternatively, shaft holes are provided on both the support arm 62 and the support 61. The additionally provided horizontal shaft 80 is inserted into the shaft holes on the support arm 62 and the support 61.

[0185] The cutting device 40 is connected to the support arm 62. The support arm 62 includes a first connection portion 62b. There is a distance between the first connection portion 62b of the support arm 62 and the horizontal axis 80. The cutting device 40 is connected to the first connection portion 62b of the support arm 62. There is a distance between the cutting device 40 and the horizontal axis 80. The cutting device 40 can rotate relative to the horizontal axis 80. Since the distance between the cutting device 40 and the horizontal axis 80 is relatively far, when the support arm 62 rotates at a small angle relative to the horizontal axis 80, the support arm 62 can drive the cutting device 40 to move a relatively large distance along the vertical direction Y, which is conducive to improving the vertical position adjustment efficiency of the cutting device 40.

[0186] Exemplarily, the cutting device 40 is detachably connected to the first connecting portion 62 b of the supporting arm 62 .

[0187] Exemplarily, the driver 41 of the cutting device 40 is connected to the first connecting portion 62 b of the supporting arm 62 .

[0188] Exemplarily, along the vertical direction Y, the blade cover 43 and the blade 42 of the cutting device 40 can be arranged below the support arm 62. Exemplarily, along the vertical direction Y, there is a distance between the blade cover 43 of the cutting device 40 and the support arm 62 to avoid the problem of position interference between the support arm 62 and the blade cover 43 when the support arm 62 swings relative to the support 61.

[0189] The height adjustment assembly 60 further includes a driving unit connected to the support arm 62. The driving unit can apply a force to the support arm 62 so that the support arm 62 can rotate around the horizontal axis 80 under the action of a rotational torque, so that the support arm 62 can drive the cutting device 40 to rise or fall.

[0190] Exemplarily, the support arm 62 includes a second connection portion 62c. The drive unit is connected to the second connection portion 62c of the support arm 62. The second connection portion 62c of the support arm 62 is a region for bearing force. The drive unit can transmit force to the support arm 62 through the second connection portion 62c. There is a distance between the second connection portion 62c of the support arm 62 and the horizontal axis 80. Exemplarily, the second connection portion 62c is located on the side of the horizontal axis 80 facing the first connection portion 62b, so that the overall structure formed by the drive unit and the support arm 62 is relatively compact and occupies little space.

[0191] Exemplarily, the first connection portion 62b of the support arm 62 is located on a side of the second connection portion 62c away from the horizontal axis 80. The driver 41 of the cutting device 40 is located on a side of the second connection portion 62c of the support arm 62 away from the horizontal axis 80.

[0192] In some practicable embodiments, the cutting device 40 is rotatably connected to the height adjustment assembly 60. When the height adjustment assembly 60 drives the cutting device 40 to move vertically, the cutting device 40 also rotates relative to the height adjustment assembly 60, so that the cutting device 40 itself does not swing relative to the vertical direction Y, ensuring that the blade 42 only changes in height and does not swing relative to the horizontal plane. Figure 4 As shown, the cutting device 40 is rotatably connected to the support arm 62. Exemplarily, the cutting device 40 is rotatably connected to the first connection portion 62b of the support arm 62. When the driving unit drives the support arm 62 to rotate relative to the horizontal axis 80, the cutting device 40 also rotates relative to the support arm 62, so that when the support arm 62 drives the cutting device 40 to move vertically, the cutting device 40 itself will not swing relative to the vertical direction Y, ensuring that the cutter disc 42 only changes in height and does not swing relative to the horizontal plane.

[0193] In some possible implementations, see Figure 4As shown, the support arm 62 includes a housing portion 62a. The housing portion 62a is located on the side of the second connection portion 62c of the support arm 62 away from the horizontal axis 80. In the vertical direction Y, the housing portion 62a passes through the support arm 62. The driver 41 of the cutting device 40 is connected to the support arm 62. The driver 41 is inserted into the housing portion 62a of the support arm 62, that is, the support arm 62 is sleeved on the outside of the driver 41, so that the driver 41 can reuse the housing portion 62a of the support arm 62, so as to effectively improve the compactness of the structure of the cutting system 20, reduce the overall volume, and occupy a small space. Along the vertical direction Y, the blade cover 43 of the cutting device 40 is arranged below the housing portion 62a.

[0194] For some examples, see Figure 4 As shown, the support arm 62 includes a transverse connecting arm 621, a first sub-support arm 622 and a second sub-support arm 623. The second connecting portion 62c is arranged on the transverse connecting arm 621. There is a distance between the transverse connecting arm 621 and the support 61. The first sub-support arm 622 is arranged on one side of the transverse connecting arm 621 facing the support 61, and the second sub-support arm 623 is arranged on the other side facing away from the support 61. Along the travel direction Z of the lawn mower 10, the first sub-support arm 622 and the second sub-support arm 623 are arranged on both sides of the transverse connecting arm 621 respectively. The travel direction Z of the lawn mower 10 is perpendicular to the transverse direction X of the lawn mower 10. The first sub-support arm 622 is rotatably connected to the support 61 through a horizontal shaft 80. The second sub-support arm 623 is provided with a first connecting portion 62b.

[0195] The driver 41 of the cutting device 40 can be connected to the second sub-support arm 623. Exemplarily, the driver 41 of the cutting device 40 is rotatably connected to the second sub-support arm 623. Exemplarily, the end of the second sub-support arm 623 away from the transverse connecting arm 621 is provided with a first connecting portion 62b.

[0196] Exemplarily, the transverse connecting arm 621 is a strip-shaped structure. The length direction of the transverse connecting arm 621 is the same as the transverse direction X of the lawn mower 10. The width direction of the transverse connecting arm 621 is the same as the travel direction Z of the lawn mower 10. Along the width direction of the transverse connecting arm 621, a first sub-support arm 622 and a second sub-support arm 623 are respectively provided on both sides of the transverse connecting arm 621.

[0197] The driver 41 and the support 61 of the cutting device 40 are respectively located on both sides of the transverse connecting arm 621. By applying torque to the transverse connecting arm 621, the first sub-support arm 622 can be driven to rotate relative to the support 61, and the second sub-support arm 623 drives the driver 41 to move vertically. The transverse connecting arm 621 is located between the first sub-support arm 622 and the second sub-support arm 623 as a force-bearing structure, which is conducive to improving the overall structural compactness of the support arm 62 and taking up less space.

[0198] In some examples, in one support arm 62, there are two first sub-support arms 622. The two first sub-support arms 622 are arranged at intervals along the lateral direction X of the lawn mower 10. The two first sub-support arms 622 are rotatably connected to the support 61. At least a portion of the drive unit can be located between the two first sub-support arms 622 to effectively utilize the space between the two first sub-support arms 622, which is conducive to improving the compactness of the overall structure of the cutting system 20, reducing the overall volume, and occupying less space.

[0199] In some examples, in one support arm 62 , there are two second support sub-arms 623 , and the two second support sub-arms 623 are spaced apart from each other along the transverse direction X of the lawn mower 10 .

[0200] An accommodating portion 62a is formed between the two second sub-support arms 623. The cutting device 40 is arranged in the accommodating portion 62a. The cutting device 40 is arranged between the two second sub-support arms 623 to effectively utilize the space between the two second sub-support arms 623, which is beneficial to improving the compactness of the overall structure of the cutting system 20, reducing the overall volume, and occupying a small space. Exemplarily, the driver 41 of the cutting device 40 is arranged between the two second sub-support arms 623. The driver 41 of the cutting device 40 is rotatably connected to the two second sub-support arms 623, which is beneficial to improving the connection stability between the cutting device 40 and the support arm 62 and the position stability during the rotation process.

[0201] The two second sub-support arms 623 are spaced apart along the transverse direction X of the lawn mower 10 . The position adjustment device 50 can drive the driver 41 of the cutting device 40 to move transversely between the two second sub-support arms 623 .

[0202] In some examples, the number of the support 61 is one. The two first sub-support arms 622 are rotatably connected to the same support 61 .

[0203] For some examples, see Figure 4 As shown, there are two supports 61. Two first sub-support arms 622 are arranged on one side of the transverse connecting arm 621, and two second sub-support arms 623 are arranged on the other side. The two supports 61 and the two first sub-support arms 622 are arranged at intervals along the transverse X of the lawn mower 10. The two first sub-support arms 622 are rotatably connected to the two supports 61 respectively. At least a part of the drive unit is located between the two supports 61 to effectively utilize the space between the two supports 61, which is conducive to improving the compactness of the overall structure of the cutting system 20, reducing the overall volume, and occupying a small space.

[0204] Exemplarily, along the length direction of the transverse connecting arm 621 , a second sub-support arm 623 is respectively provided at both ends of the transverse connecting arm 621 .

[0205] For some examples, see Figure 4 As shown, the middle area of ​​the transverse connecting arm 621 is provided with a second connecting portion 62c. The driving unit is connected to the second connecting portion 62c. The driving unit can apply a force to the transverse connecting arm 621 to drive the support arm 62 to swing up and down as a whole. Exemplarily, the two first sub-support arms 622 are symmetrically arranged relative to the second connecting portion 62c, which is conducive to improving the force balance of the support arm 62. The two second sub-support arms 623 are symmetrically arranged relative to the second connecting portion 62c, which is conducive to improving the force balance of the support arm 62.

[0206] In some possible implementations, see Figure 4 As shown, the height adjustment assembly 60 may include two support arms 62. The two support arms 62 are spaced apart along the vertical direction Y. The two support arms 62 are rotatably connected to the support 61 through a horizontal shaft 80. The two support arms 62 are rotatably connected to the driver 41 of the cutting device 40, respectively. Therefore, a four-bar linkage structure may be formed between the support 61, the two support arms 62, and the driver 41, thereby facilitating further improving the connection stability between the cutting device 40 and the support arms 62 and the position stability of the cutting device 40 during the rotation process relative to the support arms 62.

[0207] Along the vertical direction Y, the two support arms 62 have a first spacing relative to the two rotation axes of the support 61. Along the vertical direction Y, the two support arms 62 have a second spacing relative to the two rotation axes of the driver 41 of the cutting device 40. The first spacing is equal to the second spacing.

[0208] See also Figure 2 and Figure 4 As shown, the two rotation axes of the two support arms 62 relative to the support 61 are located in the same first vertical plane. The two rotation axes of the two support arms 62 relative to the cutting device 40 are located in the same second vertical plane. The two rotation axes of the two support arms 62 relative to the support 61 and the lines connecting the two rotation axes of the two support arms 62 relative to the cutting device 40 can form a parallelogram relationship. The first vertical plane and the second vertical plane are parallel to each other. In the process of the two support arms 62 driving the cutting device 40 to move vertically, the horizontal vertical distance between the first vertical plane and the second vertical plane decreases or increases.

[0209] In some examples, the two support arms 62 may have the same structural shape and size, which helps reduce processing costs.

[0210] In some examples, one of the two support arms 62 is connected to the drive unit. The two support arms 62 are respectively connected to the support 61 and the cutting device 40, so when the drive unit applies a force to one support arm 62, the two support arms 62 can swing up and down relative to the support 61 at the same time, and the two support arms 62 rotate relative to the driver 41 of the cutting device 40. Exemplarily, of the two support arms 62, the upper support arm 62 is connected to the drive unit.

[0211] In some possible implementations, see Figure 4 As shown, the driving unit includes a driving component (not shown) and a cam 63. The cam 63 is connected to the output shaft of the driving component. The driving component is used to drive the cam 63 to rotate. The rotation axis of the cam 63 is a vertical axis extending along the vertical direction Y.

[0212] The cam 63 has a helical surface 631. The helical surface 631 extends helically around the rotation axis. Along the vertical direction Y, the second connection portion 62c of the support arm 62 is arranged above the helical surface 631 of the cam 63. The second connection portion 62c of the support arm 62 abuts against the helical surface 631 of the cam 63. When the driving component drives the cam 63 to rotate forward or reverse, the second connection portion 62c of the support arm 62 moves relative to the helical surface 631 of the cam 63, so that the support arm 62 as a whole swings relative to the support 61, so that the height of the cutting device 40 can be adjusted.

[0213] The spiral surface 631 of the cam 63 is a continuous surface, which is beneficial to improving the movement stability of the support arm 62 during the swinging process relative to the support 61 and reducing the possibility of impact and setback between the support arm 62 and the cam 63.

[0214] Exemplarily, there are two support arms 62. The two support arms 62 are spaced apart along the vertical direction Y. The upper support arm 62 abuts against the spiral surface 631 of the cam 63. In the vertical direction Y, the second connecting portion 62c of the upper support arm 62 is disposed above the spiral surface 631 of the cam 63, and at least part of the cam 63 is disposed in the space between the first sub-support arms 622 of the two support arms 62, thereby reducing the overall volume and occupying less space.

[0215] Exemplarily, the second connection portion 62c of the support arm 62 includes a spherical portion. The outer surface of the spherical portion is a spherical surface. The spherical surface of the second connection portion 62c abuts against the helical surface 631 of the cam 63, which is conducive to reducing the friction resistance between the second connection portion 62c and the helical surface 631.

[0216] Exemplarily, when the driving component drives the cam 63 to rotate forward, the cam 63 pushes the support arm 62 to swing upward relative to the support 61, so that the support arm 62 drives the cutting device 40 to move upward, increases the height of the cutting device 40, and increases the distance between the blade disc 42 and the ground. When the driving component drives the cam 63 to rotate reversely, the cam 63 releases the support arm 62. The support arm 62 swings downward relative to the support 61, so that the support arm 62 drives the cutting device 40 to move downward, reduces the height of the cutting device 40, and reduces the distance between the blade disc 42 and the ground.

[0217] Exemplarily, when the driving component drives the cam 63 to reverse, under the gravity force of the cutting device 40, the cutting device 40 can drive the support arm 62 to swing downward relative to the support 61, and the second connecting portion 62c of the support arm 62 maintains contact with the spiral surface 631 of the cam 63.

[0218] For some examples, see Figure 4 As shown, at least part of the cam 63 is disposed in the space between the first sub-support arms 622 of the two support arms 62. The cam 63 can utilize the space between the two first sub-support arms 622 to improve the overall compactness of the height adjustment assembly 60, reduce the overall volume of the height adjustment assembly 60, and occupy a smaller space.

[0219] In some examples, the driving component includes a motor, and an output shaft of the motor is connected to the cam 63 .

[0220] In some possible implementations, the driving component may be disposed on the body 30 , so that the body 30 may carry the driving unit. Exemplarily, the driving component may be detachably connected to the body 30 .

[0221] See also Figure 2 and Figure 4 As shown, the height adjustment assembly 60 of the embodiment of the present application further includes a transverse guide 64. The cutting device 40 is slidably connected to the transverse guide 64. The height adjustment assembly 60 is used to drive the transverse guide 64 to move vertically in the vertical direction Y to adjust the height of the transverse guide 64, thereby adjusting the height of the cutting device 40. When the cutting device 40 is subjected to a force in the transverse direction X of the lawn mower 10, the cutting device 40 can move laterally on the transverse guide 64, so that the cutting device 40 can switch between the center position and the side cutting position.

[0222] In some possible implementations, the driver 41 of the cutting device 40 can be slidably connected to the transverse guide 64. In some examples, the housing of the driver 41 can be slidably connected to the transverse guide 64.

[0223] In some examples, the transverse guide 64 can be a circular shaft. The cutting device 40 includes an axial hole. The transverse guide 64 is inserted into the axial hole of the cutting device 40. The transverse guide 64 passes through the cutting device 40, which is conducive to improving the connection stability and reliability between the transverse guide 64 and the cutting device 40, and effectively avoiding the situation where the cutting device 40 falls off or separates from the transverse guide 64. The axial direction of the transverse guide 64 is the same as the transverse X of the lawn mower 10. Exemplarily, a bushing (not shown in the figure) is provided in the axial hole of the cutting device 40. The transverse guide 64 is inserted into the bushing. The bushing can isolate the cutting device 40 from the transverse guide 64, which is conducive to avoiding the problem that the cutting device 40 directly slides back and forth on the transverse guide 64 and causes the cutting device 40 to wear.

[0224] For example, the material of the bushing can be a metal material. The material of the transverse guide 64 can be a metal material. The driver 41 of the cutting device 40 includes a housing. The material of the housing can be plastic.

[0225] For some examples, see Figure 2 and Figure 4 As shown, the cutting device 40 further includes a sliding connection member 44. The cutting device 40 is slidably connected to the transverse guide member 64 via the sliding connection member 44. The sliding connection member 44 is provided with an axial hole. The sliding connection member 44 can be connected to the driver 41.

[0226] In some examples, the height adjustment assembly 60 includes a support arm 62. A transverse guide 64 is rotatably connected to the support arm 62. The rotation axis of the transverse guide 64 relative to the support arm 62 is a horizontal axis. The cutting device 40 is rotatably connected to the transverse guide 64. The cutting device 40 can slide laterally on the transverse guide 64, and the cutting device 40 and the transverse guide 64 can rotate around the horizontal axis relative to the support arm 62. The height adjustment assembly 60 can drive the transverse guide 64 to move vertically in the vertical direction Y, so as to drive the cutting device 40 to move vertically through the transverse guide 64. During the vertical movement of the cutting device 40, the cutting device 40 and the transverse guide 64 rotate synchronously relative to the support arm 62, so that the cutting device 40 itself will not swing relative to the vertical direction Y, ensuring that the cutter head 42 only changes in height and does not swing relative to the horizontal plane.

[0227] Exemplarily, the support arm 62 includes a first connection portion 62 b. A spacing exists between the first connection portion 62 b of the support arm 62 and the horizontal axis 80. The transverse guide member 64 is connected to the first connection portion 62 b of the support arm 62.

[0228] In some examples, the support arm 62 includes a second sub-support arm 623. The driver 41 can be slidably connected to the second sub-support arm 623, and the driver 41 can be rotatably connected to the second sub-support arm 623. The movable connection between the driver 41 and the second sub-support arm 623 can make the overall structure formed by the driver 41 and the support arm 62 more compact and occupy less space.

[0229] In some examples, the support arm 62 includes a second support sub-arm 623. The transverse guide 64 is rotatably connected to the second support sub-arm 623. The driver 41 is slidably connected to the transverse guide 64.

[0230] The connection between the driver 41 and the second sub-support arm 623 through the transverse guide member 64 is conducive to reducing the design difficulty of the connection structure between the driver 41 and the second sub-support arm 623 and the difficulty of disassembly and assembly between the driver 41 and the second sub-support arm 623, thereby reducing processing costs and maintenance costs.

[0231] In some examples, the support arm 62 includes a receiving portion 62a. The transverse guide member 64 is disposed corresponding to the receiving portion 62a of the support arm 62. The transverse guide member 64 and the support arm 62 are disposed together around the receiving portion 62a. The driver 41 of the cutting device 40 can be inserted into the receiving portion 62a of the support arm 62. The driver 41 of the cutting device 40 can be slidably connected to the transverse guide member 64.

[0232] Exemplarily, the support arm 62 includes two second sub-support arms 623. Along the sliding direction of the cutting device 40, the two second sub-support arms 623 are arranged at intervals, so that a receiving portion 62a is formed between the two second sub-support arms 623. The sliding direction of the cutting device 40 is the same as the lateral direction X of the lawn mower 10. Both ends of the lateral guide 64 are rotatably connected to the two second sub-support arms 623 respectively. The two second sub-support arms 623, the lateral connecting arm 621 and the lateral guide 64 are arranged together around the receiving portion 62a, so that the two second sub-support arms 623, the lateral connecting arm 621 and the lateral guide 64 are in a "mouth"-shaped structure.

[0233] Exemplarily, the end of the second sub-support arm 623 away from the transverse connecting arm 621 has a first connecting portion 62b. The transverse guide 64 is rotatably connected to the first connecting portion 62b. Exemplarily, when the cutting device 40 moves laterally relative to the transverse guide 64, the two second sub-support arms 623 can limit the cutting device 40.

[0234] Exemplarily, the first connecting portion 62b includes a connecting hole. The end of the second sub-support arm 623 away from the transverse connecting arm 621 has a connecting hole. The transverse guide member 64 is inserted into the connecting hole, and the transverse guide member 64 is rotatably connected to the second sub-support arm 623. Exemplarily, a bearing can be provided in the connecting hole of the second sub-support arm 623. The transverse guide member 64 is rotatably connected to the second sub-support arm 623 through the bearing.

[0235] Exemplarily, the position adjustment device 50 can only drive the cutting device 40 to move laterally to one side of the lawn mower 10. For example, the position adjustment device 50 can only drive the cutting device 40 to move laterally to the right side of the lawn mower 10. Alternatively, the position adjustment device 50 can only drive the cutting device 40 to move laterally to the left side of the lawn mower 10. When the cutting device 40 contacts one of the second sub-support arms 623, the cutting device 40 slides to the extreme position, that is, the cutting device 40 slides to the side cutting position. When the cutting device 40 contacts another second sub-support arm 623, the cutting device 40 slides to the extreme position, that is, the cutting device 40 slides to the center position.

[0236] Alternatively, the position adjustment device 50 can drive the cutting device 40 to move laterally to any side of the lawn mower 10. For example, the position adjustment device 50 can drive the cutting device 40 to move laterally to the left or right side of the lawn mower 10. When the cutting device 40 is located in the middle area of ​​the transverse guide 64, the cutting device 40 is in the center position. When the cutting device 40 moves laterally and contacts any of the second sub-support arms 623, the cutting device 40 slides to the extreme position, that is, the cutting device 40 slides to the side cutting position.

[0237] In some achievable ways, Figure 5 The partial structure of the cutting system 20 is schematically shown. Figure 5 As shown, the position adjustment device 50 also includes a screw rod 70 and a driving device 100. The screw rod 70 is connected to the support arm 62. The driving device 100 is used to provide a driving force. The screw rod 70 and the driving device 100 work together to drive the cutting device 40 to move laterally on the screw rod 70.

[0238] In some achievable ways, the screw rod 70 is connected to the support arm 62. For example, the end of the screw rod 70 can be fixedly connected to the support arm 62, so that the screw rod 70 itself does not rotate relative to the support arm 62. For example, a connecting hole is provided on the support arm 62. The end of the screw rod 70 is interference fit with the connecting hole. For another example, a connecting hole is provided on the support arm 62. The end of the screw rod 70 is inserted into the connecting hole, and the screw rod 70 and the support arm 62 are connected using fasteners such as screws.

[0239] The cutting device 40 is connected to the driving device 100. The cutting device 40 and the driving device 100 can form an integral structure. The driving device 100 is threadedly connected to the screw rod 70 so that threaded transmission is achieved between the driving device 100 and the screw rod 70. When the driving device 100 is in a working state, the driving device 100 can move along the axial direction of the screw rod 70.

[0240] The driving unit is used to drive the support arm 62 to rotate relative to the support 61 so that the cutting device 40 moves vertically along the vertical direction Y. When the driving device 100 moves laterally relative to the screw rod 70, the driving device 100 and the cutting device 40 move laterally relative to the screw rod 70 synchronously.

[0241] The support arm 62 includes a transverse connecting arm 621, a first sub-support arm 622 and a second sub-support arm 623. The first sub-support arm 622 is disposed on one side of the transverse connecting arm 621, and the second sub-support arm 623 is disposed on the other side.

[0242] The first sub-support arm 622 is rotatably connected to the support 61. The transverse connecting arm 621 is connected to the driving unit. The second sub-support arm 623 is located on the side of the transverse connecting arm 621 facing away from the support 61. The end of the screw rod 70 is fixedly connected to the second sub-support arm 623. The cutting device 40 is fixedly connected to the driving device 100. The driving device 100 is inserted into the screw rod 70, and the driving device 100 is threadedly connected to the screw rod 70 so that the driving device 100 and the screw rod 70 are threadedly transmitted. The driving unit is used to drive the support arm 62 to rotate relative to the support 61 through the transverse connecting arm 621 to adjust the height of the cutting device 40 above the ground. When the driving device 100 moves laterally relative to the screw rod 70, it drives the cutting device 40 to move laterally synchronously.

[0243] In some examples, the number of support arms 62 may be one, which helps to reduce the number of parts used and helps to make the cutting system 20 itself compact.

[0244] In some examples, Figure 6 The partial structure of the cutting system 20 is schematically shown. Figure 5 and Figure 6As shown, the driving device 100 may include a motor, a driving gear 110 and a driven gear 120. The output shaft of the motor is connected to the driving gear 110. The driving gear 110 and the driven gear 120 are meshed and transmitted. The motor can drive the driving gear 110 to rotate, and drive the driven gear 120 to rotate through the driving gear 110. The driven gear 120 is threadedly connected to the screw rod 70. The driven gear 120 includes an internal threaded hole threadedly connected to the screw rod 70. When the driven gear 120 rotates forward or reversely, since the screw rod 70 itself does not rotate, the driven gear 120 can move along the axial direction of the screw rod 70, thereby driving the driving device 100 to move along the axial direction of the screw rod 70, and then driving the cutting device 40 connected to the driving device 100 to move along the axial direction of the screw rod 70. The axial direction of the screw rod 70 can be the same as the horizontal direction X of the lawn mower 10. Exemplarily, the cutting device 40 can apply a reverse torque to the cutting device 40 by its own gravity. In the arrangement mode in which the driving device 100 includes a motor, a driving gear 110 and a driven gear 120, since the gear transmission structure is subjected to balanced force and the transmission is stable, it is beneficial to improve the stability of the movement process of the cutting device 40.

[0245] In some achievable ways, Figure 7 The partial structure of the cutting system 20 is schematically shown. Figure 4 and Figure 7 As shown, the number of support arms 62 is two. The two support arms 62 are spaced apart along the vertical direction Y. The first sub-support arm 622 of each support arm 62 is rotatably connected to the support 61. The position adjustment device 50 also includes a transverse guide 64. The cutting device 40 is slidably connected to the transverse guide 64. One of the two support arms 62 is connected to the transverse guide 64, and the other is connected to the screw 70. The transverse guide 64 is rotatably connected to the second sub-support arm 623. The driving device 100 is used to drive the cutting device 40 to slide on the transverse guide 64.

[0246] A four-bar structure can be formed between the support 61, the two support arms 62, the transverse guide 64, the screw rod 70 and the cutting device 40, which is beneficial to further improve the connection stability between the support 61, the two support arms 62, the transverse guide 64, the screw rod 70 and the cutting device 40 and the position stability of the cutting device 40 during the rotation process relative to the support arm 62.

[0247] Exemplarily, when the driven gear 120 rotates relative to the screw rod 70 , the cutting device 40 can slide relative to the transverse guide member 64 , and the transverse guide member 64 can apply a reverse torque to the cutting device 40 .

[0248] In some examples, the upper support arm 62 is provided with a screw rod 70 , and the lower support arm 62 is provided with a transverse guide 64 .

[0249] In some achievable ways, the number of the support arms 62 is two. The support arm 62 includes a transverse connecting arm 621, a first sub-support arm 622 and a second sub-support arm 623. The first sub-support arm 622 is arranged on one side of the transverse connecting arm 621, and the second sub-support arm 623 is arranged on the other side. The upper transverse connecting arm 621 is connected to the drive unit. The first sub-support arm 622 of each of the two support arms 62 is rotatably connected to the support 61 respectively. The second sub-support arm 623 is located on the side of the transverse connecting arm 621 facing away from the support 61. One of the transverse guide 64 and the screw rod 70 is connected to the second sub-support arm 623 of the upper support arm 62, and the other is connected to the second sub-support arm 623 of the lower support arm 62.

[0250] In some examples, the screw rod 70 is connected to the second sub-support arm 623 of the upper support arm 62 . The transverse guide member 64 is connected to the second sub-support arm 623 of the lower support arm 62 .

[0251] In some achievable embodiments, the cutting device 40 further includes a sliding connection member 44. The sliding connection member 44 can be slidably connected to the transverse guide member 64. The number of the sliding connection members 44 can be two. The two sliding connections 44 are arranged at intervals. The two sliding connections 44 are arranged at intervals along the transverse direction X of the lawn mower 10, that is, along the sliding direction of the cutting device 40, the two sliding connections 44 are arranged at intervals. At least part of the driving device 100 is located in the space formed between the two sliding connections 44.

[0252] The cutting device 40 is slidably connected to the transverse guide member 64 via a sliding connection member 44. The sliding connection member 44 is rotatably connected to the transverse guide member 64. The sliding connection member 44 can be rotatably connected to the support arm 62 via the transverse guide member 64. A four-bar linkage structure relationship can be formed between the support 61, the two support arms 62, the transverse guide member 64, the screw rod 70 and the sliding connection member 44.

[0253] Exemplarily, the sliding connection member 44 is connected to the driver 41. The sliding connection member 44 can be slidably connected to the transverse guide member 64. The cutting device 40 is slidably connected to the transverse guide member 64 through two sliding connections 44, which is conducive to reducing the complexity of the connection structure between the cutting device 40 and the transverse guide member 64, and at the same time can ensure the stability of the sliding process of the cutting device 40 relative to the transverse guide member 64.

[0254] At least part of the driving device 100 is located between the two sliding connectors 44 to effectively utilize the space between the two sliding connectors 44, which is beneficial to improving the compactness of the overall structure of the cutting system 20, reducing the overall volume, and occupying less space.

[0255] In some examples, the drive device 100 is entirely located between the two sliding connections 44 .

[0256] In some examples, the sliding connector 44 includes an axial hole and an avoidance hole. The transverse guide member 64 is inserted into the axial hole so that the sliding connector 44 and the transverse guide member 64 are slidably matched. The screw rod 70 is inserted into the avoidance hole. The diameter of the avoidance hole is larger than the diameter of the screw rod 70. The avoidance hole is used to avoid the screw rod 70.

[0257] The transverse guide 64 passes through the sliding connector 44, which is conducive to improving the connection stability and reliability between the transverse guide 64 and the sliding connector 44, and effectively preventing the cutting device 40 from falling off or separating from the transverse guide 64. The sliding connector 44 can avoid the screw rod 70, avoiding position interference between the sliding connector 44 and the screw rod 70 when the sliding connector 44 moves horizontally, thereby affecting the stability of the horizontal movement of the sliding connector 44.

[0258] Exemplarily, the transverse guide member 64 is a circular shaft, and the shaft hole of the sliding connection member 44 is a circular hole. When the transverse guide member 64 is inserted into the shaft hole of the sliding connection member 44, the sliding connection member 44 and the transverse guide member 64 are rotatably matched, that is, the sliding connection member 44 can rotate relative to the transverse guide member 64.

[0259] In some examples, along the vertical direction Y, there is a first spacing between the two rotation axes of the two support arms 62 relative to the support 61. Along the vertical direction Y, there is a second spacing between the axis of the transverse guide 64 and the axis of the screw 70. The first spacing is equal to the second spacing.

[0260] The two rotation axes of the two support arms 62 relative to the support 61 are located in the same first vertical plane. The axis of the transverse guide 64 and the axis of the screw 70 are located in the same second vertical plane. The lines connecting the two rotation axes of the two support arms 62 relative to the support 61, the axis of the transverse guide 64 and the axis of the screw 70 form a parallelogram relationship. The first vertical plane and the second vertical plane are parallel to each other. In the process of the two support arms 62 swinging to drive the cutting device 40 to move vertically, the horizontal vertical distance between the first vertical plane and the second vertical plane changes.

[0261] In some examples, the transverse guide member 64 can be a circular shaft. Both ends of the transverse guide member 64 are rotatably connected to the support arm 62. The axis of the transverse guide member 64 is the rotation axis of the transverse guide member 64 relative to the support arm 62. The axis of the transverse guide member 64 is parallel to the axis of the screw rod 70.

[0262] In some examples, the sliding connector 44 may be integrally formed with the housing of the driver 41, which is beneficial to improving the mechanical connection strength between the sliding connector 44 and the driver 41. The material of the sliding connector 44 may be the same as that of the housing.

[0263] In some examples, the sliding connection 44 is detachably connected to the housing of the driver 41 .

[0264] In some examples, the position adjustment device further includes a mounting bracket 200. The mounting bracket 200 is connected to the sliding connector 44. The driving device 100 is connected to the mounting bracket 200. The mounting bracket 200 can provide a mounting base for the driving device 100, so as to facilitate the connection between the driving device 100 and the cutting device 40. The driving device 100, the mounting bracket 200 and the cutting device 40 are connected to each other to form an integral structure, so that when the driving device 100 is in a working state, the driving device 100 can drive the cutting device 40 to move along the axial direction of the screw rod 70, so that the cutting device 40 switches between the center position and the side cutting position.

[0265] Exemplarily, there are two sliding connectors 44. There is a receiving space between the two sliding connectors 44, and the drive device 100 is arranged on the side of the mounting bracket 200 facing the receiving space, so that the space between the two sliding connectors 44 can be reused, reducing the space occupancy rate of the drive device 100.

[0266] Exemplarily, the mounting bracket 200 is detachably connected to the sliding connection member 44. The driving device 100 is detachably connected to the mounting bracket 200.

[0267] Illustratively, the mounting bracket 200 may be a mounting plate.

[0268] Figure 8 The partial structure of the cutting system 20 is schematically shown. Figure 8 As shown, the embodiment of the present application provides a cutting system 20 for a lawn mower 10. The cutting system 20 includes a cutting device 40 and a position adjustment device 50. The position adjustment device 50 includes a support 61, a support arm 62, a driving unit, a screw 70 and a driving device 100.

[0269] The support arm 62 is rotatably connected to the support 61. The driving unit is connected to the support arm 62. The screw rod 70 is rotatably connected to the support arm 62. The end of the screw rod 70 is connected to the driving device 100. The cutting device 40 is threadedly connected to the screw rod 70, so that the cutting device 40 and the screw rod 70 are threadedly driven.

[0270] The driving unit is used to drive the support arm 62 to rotate relative to the support 61 so that the cutting device 40 moves vertically along the vertical direction Y. The driving device 100 is used to drive the screw rod 70 to rotate relative to the support arm 62. The screw rod 70 drives the cutting device 40 to move horizontally relative to the screw rod 70.

[0271] The support arm 62 includes a transverse connecting arm 621, a first sub-support arm 622 and a second sub-support arm 623. The first sub-support arm 622 is disposed on one side of the transverse connecting arm 621, and the second sub-support arm 623 is disposed on the other side.

[0272] The first sub-support arm 622 is rotatably connected to the support 61. The transverse connecting arm 621 is connected to the driving unit. The second sub-support arm 623 is located on the side of the transverse connecting arm 621 facing away from the support 61. The end of the screw rod 70 is rotatably connected to the second sub-support arm 623. The end of the screw rod 70 is connected to the driving device 100. The cutting device 40 is threadedly connected to the screw rod 70, so that the cutting device 40 and the screw rod 70 are threadedly transmitted.

[0273] The driving unit is used to drive the support arm 62 to rotate relative to the support 61 through the transverse connecting arm 621 to adjust the height of the cutting device 40 relative to the ground. The driving device 100 is used to drive the screw rod 70 to rotate relative to the support arm 62. The screw rod 70 drives the cutting device 40 to move laterally.

[0274] In some examples, the number of support arms 62 may be one, which helps to reduce the number of parts used and helps to make the cutting system 20 itself compact.

[0275] In some achievable ways, Fig. 9 The partial structure of the cutting system 20 is schematically shown. Fig. 9 As shown, the number of support arms 62 is two. The two support arms 62 are spaced apart along the vertical direction Y. The first sub-support arm 622 of each support arm 62 is rotatably connected to the support 61 respectively. The position adjustment device 50 also includes a transverse guide 64. The cutting device 40 is slidably connected to the transverse guide 64. One of the two support arms 62 is connected to the transverse guide 64, and the other is connected to the screw 70. The transverse guide 64 is rotatably connected to the second sub-support arm 623. The cutting device 40 includes an axial hole and a threaded hole. The transverse guide 64 is penetrated in the axial hole so that the cutting device 40 and the transverse guide 64 can be slidably matched. The screw 70 is threadedly connected to the threaded hole. The driving device 100 is used to drive the cutting device 40 to slide on the transverse guide 64.

[0276] The threaded connection between the cutting device 40 and the screw rod 70 does not require an additional connection structure for connecting the cutting device 40 and the screw rod 70, which is beneficial to reducing the number of parts used. At the same time, the screw rod 70 passes through the cutting device 40, which is beneficial to improving the connection stability and reliability between the screw rod 70 and the cutting device 40.

[0277] In some achievable embodiments, the cutting device 40 includes a driver 41, a blade 42, and a blade cover 43. The blade 42 includes a blade 421. The blade cover 43 is connected to the driver 41. The blade 42 is disposed below the blade cover 43. The blade 42 is connected to an output shaft of the driver 41. The driver 41 is slidably connected to the transverse guide 64. The driver 41 is threadedly connected to the screw 70, so that the driver 41 and the screw 70 are threadedly driven.

[0278] The threaded connection between the driver 41 and the screw rod 70 does not require an additional connection structure between the cutting device 40 and the screw rod 70, which is beneficial to reducing the number of parts used. At the same time, the screw rod 70 passes through the driver 41, which is beneficial to improving the connection stability and reliability between the screw rod 70 and the cutting device 40.

[0279] In some examples, the driver 41 may include an axial hole and a threaded hole. The transverse guide member 64 is disposed through the axial hole of the driver 41 so that the cutting device 40 is slidably matched with the transverse guide member 64. The screw rod 70 is threadedly connected to the threaded hole of the driver 41.

[0280] In some achievable embodiments, the cutting device 40 includes a driver 41 and a sliding connector 44. The driver 41 is connected to the sliding connector 44. The sliding connector 44 can be slidably connected to the transverse guide 64. In some examples, the sliding connector 44 can include an axial hole and a threaded hole. The transverse guide 64 is inserted into the axial hole of the sliding connector 44 so that the cutting device 40 and the transverse guide 64 are slidably matched. The screw rod 70 is threadedly connected to the threaded hole of the sliding connector 44.

[0281] In some achievable embodiments, the driving device 100 may include a motor and a gear-type speed change structure. The motor is connected to an input shaft of the gear-type speed change structure. The output shaft of the gear-type speed change structure is connected to the screw rod 70.

[0282] In some practicable embodiments, the ends of the screw rod 70 may be rotatably connected to the support arm 62 via bearings.

[0283] In some practicable embodiments, the driving device 100 may be disposed on the support arm 62. For example, the driving device 100 may be detachably connected to the support arm 62.

[0284] In some achievable ways, there are two support arms 62. The two support arms 62 are spaced apart along the vertical direction Y. The two support arms 62 are rotatably connected to the support 61 respectively. One of the two support arms 62 is connected to the transverse guide 64, and the other is connected to the screw rod 70.

[0285] A four-bar structure can be formed between the support 61, the two support arms 62, the transverse guide 64, the screw rod 70 and the cutting device 40, which is beneficial to further improve the connection stability between the support 61, the two support arms 62, the transverse guide 64, the screw rod 70 and the cutting device 40 and the position stability of the cutting device 40 during the rotation process relative to the support arm 62.

[0286] In some examples, the upper support arm 62 is provided with a screw rod 70 , and the lower support arm 62 is provided with a transverse guide 64 .

[0287] In some examples, the screw rod 70 and the driving device 100 may be disposed on the same support arm 62. For example, the screw rod 70 and the driving device 100 may be disposed on the upper support arm 62.

[0288] In some examples, the cutting device 40 includes an axial hole and a threaded hole. The transverse guide member 64 is inserted into the axial hole so that the cutting device 40 and the transverse guide member 64 are slidably matched. The screw rod 70 is threadedly connected to the threaded hole of the cutting device 40 so that threaded transmission is achieved between the cutting device 40 and the screw rod 70.

[0289] The transverse guide member 64 passes through the cutting device 40 , which is beneficial to improve the connection stability and reliability between the transverse guide member 64 and the cutting device 40 , and effectively prevents the cutting device 40 from falling off or separating from the transverse guide member 64 .

[0290] The cutting device 40 is threadedly connected to the screw rod 70 through a threaded hole, so there is no need to additionally set up a connecting structure between the cutting device 40 and the screw rod 70, which is beneficial to reducing the number of parts used. At the same time, the screw rod 70 passes through the cutting device 40, which is beneficial to improving the connection stability and reliability between the screw rod 70 and the cutting device 40.

[0291] In some achievable ways, the number of the support arms 62 is two. The support arm 62 includes a transverse connecting arm 621, a first sub-support arm 622 and a second sub-support arm 623. The first sub-support arm 622 is arranged on one side of the transverse connecting arm 621, and the second sub-support arm 623 is arranged on the other side. The upper transverse connecting arm 621 is connected to the drive unit. The first sub-support arm 622 of each of the two support arms 62 is rotatably connected to the support 61. One of the transverse guide 64 and the screw rod 70 is connected to the second sub-support arm 623 of the upper support arm 62, and the other is connected to the second sub-support arm 623 of the lower support arm 62.

[0292] In some examples, the screw rod 70 is connected to the second sub-support arm 623 of the upper support arm 62 . The transverse guide member 64 is connected to the second sub-support arm 623 of the lower support arm 62 .

[0293] In some examples, the driving device 100 may be disposed on the second sub-support arm 623 of the support arm 62. For example, the driving device 100 may be disposed on the second sub-support arm 623 of the upper support arm 62.

[0294] In some examples, in each support arm 62, there are two second support sub-arms 623. The two ends of the screw rod 70 are respectively connected to the two second support sub-arms 623. The two ends of the transverse guide member 64 are rotatably connected to the second support sub-arms 623.

[0295] The two ends of the screw rod 70 are respectively connected to the two second sub-support arms 623, which effectively ensures the connection stability and reliability between the screw rod 70 and the support arm 62. The two ends of the transverse guide member 64 are rotatably connected to the two second sub-support arms 623, which effectively ensures the connection stability and reliability between the transverse guide member 64 and the support arm 62.

[0296] In some achievable embodiments, the cutting device 40 includes a blade 421. The blade 421 is used for mowing. The driving device 100 drives the cutting device 40 to move laterally. The cutting device 40 drives the blade 421 to move laterally synchronously, so that at least part of the blade 421 moves outside the orthographic projection of the fuselage 30 toward the ground.

[0297] In some examples, when the cutting device 40 is located at one end of the screw rod 70, a portion of the blade 421 is located outside the orthographic projection of the fuselage 30 toward the ground, and a portion of the blade 421 is located inside the orthographic projection of the fuselage 30 toward the ground.

[0298] In some other examples, when the cutting device 40 is located at one end of the screw rod 70 , the blade 421 is entirely located outside the orthographic projection of the fuselage 30 toward the ground. There is no blade 421 below the fuselage 30 .

[0299] When the cutting device 40 is located at one end of the screw rod 70, at least part of the blade 421 is located outside the orthographic projection of the body 30 toward the ground. The blade 421 can be moved to the outside of the body 30 of the lawn mower 10, and when working, the grass in the lawn boundary area can be cleanly cut, avoiding lawn boundary residue during the cutting process, and no manual secondary trimming is required, thereby improving the user experience.

[0300] In some practicable embodiments, a portion of the screw rod 70 extends out of the orthographic projection of the fuselage 30 toward the ground. Therefore, when the cutting device 40 moves laterally on the screw rod 70, the cutting device 40 can move to the portion of the screw rod 70 extending out of the orthographic projection of the fuselage 30, so that at least a portion of the blade 421 can be located outside the orthographic projection of the fuselage 30 toward the ground.

[0301] When the lawn border needs to be trimmed, the cutting device 40 moves along the screw 70 to the outside of the body 30 of the lawn mower 10, so that the area of ​​the blade 421 moving to the outside of the lawn mower 10 is increased, further improving the trimming effect of the lawn border.

[0302] In some achievable embodiments, the cutting device 40 includes a blade 421. The driving device 100 drives the cutting device 40 to move laterally. The cutting device 40 drives the blade 421 to move laterally within the orthographic projection of the fuselage 30 toward the ground. The minimum horizontal distance between the outer edge of the blade 421 and the side edge of the orthographic projection of the fuselage 30 toward the ground is greater than or equal to 0 mm and less than or equal to 50 mm.

[0303] When the width of the lawn edge that cannot be cut is greater than 50 mm, it will affect the visual appearance and require manual re-trimming, affecting the user experience. The minimum horizontal distance between the outer edge of the blade 421 and the side edge of the orthographic projection of the fuselage 30 is greater than or equal to 0 mm and less than or equal to 50 mm, which greatly reduces the width of the uncut lawn, does not require manual secondary trimming, and improves the edge cutting effect. In addition, the blade 421 is located inside the fuselage 30, and the safety requirements can be met without the need for an additional protective structure.

[0304] The embodiment of the present application provides a lawn mower 10 . The lawn mower 10 includes a body 30 and a cutting system 20 .

[0305] The body 30 includes a first lower edge 311. The cutting system 20 is disposed on the body 30. The cutting system 20 includes a cutting device 40 and a position adjustment device 50. The position adjustment device 50 includes a support arm 62, a support 61, a drive unit, a screw 70, and a drive device 100. The support arm 62 includes a transverse connecting arm 621, a first sub-support arm 622, and a second sub-support arm 623. The first sub-support arm 622 is disposed on one side of the transverse connecting arm 621, and the second sub-support arm 623 is disposed on the other side.

[0306] The first sub-support arm 622 is rotatably connected to the support 61. The transverse connecting arm 621 is connected to the driving unit. The second sub-support arm 623 is located on the side of the transverse connecting arm 621 facing away from the support 61. The end of the screw rod 70 is fixedly connected to the second sub-support arm 623. The cutting device 40 is fixedly connected to the driving device 100. The driving device 100 is inserted into the screw rod 70, and the driving device 100 is threadedly connected to the screw rod 70, so that the driving device 100 and the screw rod 70 are threadedly transmitted.

[0307] The driving unit is used to drive the support arm 62 to rotate relative to the support 61 through the transverse connecting arm 621 to adjust the height of the cutting device 40 relative to the ground. When the driving device 100 moves transversely relative to the screw rod 70, it drives the cutting device 40 to move transversely relative to the body 30 synchronously, so that the cutting device 40 moves between the center position of the body 30 and the side cutting position of the body 30.

[0308] The cutting device 40 includes a blade disc 42 and a blade disc cover 43. The blade disc 42 is located in the blade disc cover 43. The blade disc 42 includes a blade 421. The blade disc cover 43 has a second lower edge 43a. When the cutting device 40 is located at the edge cutting position, along the vertical direction, the second lower edge 43a is lower than the first lower edge 311, and the second lower edge 43a is lower than the lower surface of the blade 421.

[0309] In the lawn mower 10 of the embodiment of the present application, the position adjustment device 50 can adjust the height of the cutting device 40, so that when the cutting device 40 is located at the side cutting position, along the vertical direction Y, the second lower edge 43a of the blade cover 43 can be lower than the first lower edge 311 of the body 30, and the second lower edge 43a of the blade cover 43 can be lower than the lower surface of the blade 421. There is a large safety distance between the second lower edge 43a of the blade cover 43 and the blade 42. When the operator is carrying the lawn mower 10, the operator's palm can be placed on the side skirt 31 of the body 30, and the fingertips of the fingers can be buckled into the inside of the blade cover 43. Under the protective effect of the blade cover 43, most of the operator's fingers are located on the outside of the blade cover 43, so that the operator's fingers are not easy to touch the blade 42. At the same time, the second lower edge 43a of the blade cover 43 is lower than the blade 42, so that when the operator's fingers bypass the second lower edge 43a of the blade cover 43 and buckle into the inside of the blade cover 43, the fingertips of the fingers are not likely to touch the blade 42.

[0310] Therefore, the lawn mower 10 of the embodiment of the present application can not only effectively cut the lawn near the lawn boundary and improve the cutting efficiency and cutting effect, but also can adjust the position of the cutting device 40 through the position adjustment device 50 so that the cutting device 40 located at the edge cutting position can meet the safety requirements for the use of the lawn mower 10 and will not cause injuries to people or animals.

[0311] The embodiment of the present application provides a lawn mower 10 . The lawn mower 10 includes a body 30 and a cutting system 20 .

[0312] The fuselage 30 includes a first lower edge. The cutting system 20 is disposed on the fuselage 30. The cutting system 20 includes a cutting device 40 and a position adjustment device 50. The position adjustment device 50 includes a support arm 62, a support 61, a drive unit, a screw rod 70 and a drive device 100. The support arm 62 includes a transverse connecting arm 621, a first sub-support arm 622 and a second sub-support arm 623. The first sub-support arm 622 is arranged on one side of the transverse connecting arm 621, and the second sub-support arm 623 is arranged on the other side. The first sub-support arm 622 is rotatably connected to the support 61. The transverse connecting arm 621 is connected to the drive unit. The second sub-support arm 623 is located on the side of the transverse connecting arm 621 facing away from the support 61. The end of the screw rod 70 is rotatably connected to the second sub-support arm 623. The end of the screw rod 70 is connected to the drive device 100. The cutting device 40 is threadedly connected to the screw rod 70 so that the cutting device 40 and the screw rod 70 are threadedly driven. The driving unit is used to drive the support arm 62 to rotate relative to the support 61 through the transverse connecting arm 621 to adjust the height of the cutting device 40 relative to the ground. The driving device 100 is used to drive the screw rod 70 to rotate relative to the support arm 62. The screw rod 70 drives the cutting device 40 to move laterally relative to the fuselage 30, so that the cutting device 40 moves between the center position of the fuselage 30 and the side cutting position of the fuselage 30.

[0313] The cutting device 40 includes a blade disc 42 and a blade disc cover 43. The blade disc 42 is located in the blade disc cover 43. The blade disc 42 includes a blade 421. The blade disc cover 43 has a second lower edge 43a. When the cutting device 40 is located at the edge cutting position, along the vertical direction Y, the second lower edge 43a is lower than the first lower edge 311, and the second lower edge 43a is lower than the lower surface of the blade 421.

[0314] In the lawn mower 10 of the embodiment of the present application, the position adjustment device 50 can adjust the height of the cutting device 40, so that when the cutting device 40 is located at the side cutting position, along the vertical direction Y, the second lower edge 43a of the blade cover 43 can be lower than the first lower edge 311 of the body 30, and the second lower edge 43a of the blade cover 43 can be lower than the lower surface of the blade 421. There is a large safety distance between the second lower edge 43a of the blade cover 43 and the blade 42. When the operator is carrying the lawn mower 10, the operator's palm can be placed on the side skirt 31 of the body 30, and the fingertips of the fingers can be buckled into the inside of the blade cover 43. Under the protective effect of the blade cover 43, most of the operator's fingers are located on the outside of the blade cover 43, so that the operator's fingers are not easy to touch the blade 42. At the same time, the second lower edge 43a of the blade cover 43 is lower than the blade 42, so that when the operator's fingers bypass the second lower edge 43a of the blade cover 43 and buckle into the inside of the blade cover 43, the fingertips of the fingers are not likely to touch the blade 42.

[0315] Therefore, the lawn mower 10 of the embodiment of the present application can not only effectively cut the lawn near the lawn boundary and improve the cutting efficiency and cutting effect, but also can adjust the position of the cutting device 40 through the position adjustment device 50 so that the cutting device 40 located at the edge cutting position can meet the safety requirements for the use of the lawn mower 10 and will not cause injuries to people or animals.

[0316] In some achievable ways, Fig.10 A partial structure of the lawn mower 10 is schematically shown. Fig.10 In the embodiment, the cutting device 40 is in the edge cutting position. Fig.10 As shown, the machine body 30 includes a side skirt 31. When the cutting device 40 is in the side cutting position of the machine body 30, along the direction perpendicular to the side skirt 31, the minimum horizontal distance d between the outer edge of the blade 421 and the side skirt 31 of the machine body 30 is greater than or equal to 10 mm and less than or equal to 50 mm. The direction perpendicular to the side skirt 31 is the same as the lateral direction X of the lawn mower 10.

[0317] In the edge cutting state, the minimum horizontal distance between the outer edge of the blade 421 and the side skirt 31 of the body 30 is greater than or equal to 10 mm and less than or equal to 50 mm. When the minimum horizontal distance between the outer edge of the blade 421 and the side skirt 31 of the body 30 is greater than 50 mm, the width of the area that cannot be cut at the edge of the lawn will affect the visual appearance, and manual re-trimming is required, which affects the user's experience. When the minimum horizontal distance between the outer edge of the blade 421 and the side skirt 31 of the body 30 is less than 10 mm, when the user is carrying the mowing, the finger is easily accidentally touched by the blade 421 when it is buckled into the body 30 from the lower edge of the side skirt 31, causing injury to the user. When the minimum horizontal distance between the outer edge of the blade 421 and the side skirt 31 of the body 30 is greater than or equal to 10 mm and less than or equal to 50 mm, while meeting the safety performance, the width of the uncut lawn is greatly reduced, and manual re-trimming is not required, thereby improving the edge cutting effect.

[0318] In some achievable ways, Fig.11 A partial structure of the lawn mower 10 is schematically shown. Fig.11 In the embodiment, the cutting device 40 in the cutting system 20 is in the central position. Fig.10 and Fig.11 As shown, the machine body 30 includes a side skirt 31. When the cutting device 40 is at the center of the machine body 30, along the direction perpendicular to the side skirt 31, the minimum horizontal distance between the outer edge of the blade 421 and the side skirt 31 of the machine body 30 is D. The direction perpendicular to the side skirt 31 is the same as the lateral direction X of the lawn mower 10.

[0319] When the cutting device 40 is at the edge cutting position of the body 30, the minimum horizontal distance between the outer edge of the blade 421 and the side skirt 31 of the body 30 is d along the direction perpendicular to the side skirt 31. The value of D is greater than the value of d.

[0320] In the embodiment of the present application, the lawn mower 10 has two working positions. According to different usage scenarios, the cutting device 40 can be adjusted to the center position of the body 30 or the side cutting position of the body 30 to meet different mowing needs of users.

[0321] Fig.12 Schematic diagram showing the partial structure of the cutting system. Fig.12 As shown, the embodiment of the present application provides a cutting system 20 for a lawn mower 10. The cutting system 20 includes a cutting device 40 and a position adjustment device 50. The position adjustment device 50 includes a support arm 62, a support 61, a drive unit, a screw rod 70 and a drive device 100.

[0322] One end of the support arm 62 is rotatably connected to the support 61, and the other end of at least one support arm 62 is connected to the screw rod 70. The end of the screw rod 70 is fixedly connected to the support arm 62. The cutting device 40 is fixedly connected to the driving device 100. The driving device 100 is inserted into the screw rod 70, and the driving device 100 is threadedly connected to the screw rod 70 so that the driving device 100 and the screw rod 70 are threadedly transmitted. Among them, the driving unit is used to drive the support arm 62 to rotate relative to the support 61 to adjust the height of the cutting device 40 above the ground. When the driving device 100 moves horizontally relative to the screw rod 70, it drives the cutting device 40 to move horizontally synchronously.

[0323] In some possible implementations, see Fig.12 As shown, the number of the support arm 62 can be one, which is beneficial to reducing the number of parts used and to making the structure of the cutting system 20 itself compact.

[0324] In some achievable ways, Fig.13 Schematic diagram showing the partial structure of the cutting system. Fig.13 As shown, the number of support arms 62 is at least two. Each support arm 62 is arranged at intervals along the vertical direction Y. One end of each support arm 62 is rotatably connected to the support 61. The position adjustment device 50 also includes a transverse guide 64. The other end of a part of the support arms 62 is rotatably connected to the transverse guide 64. The other end of a part of the support arms 62 is fixedly connected to the screw rod 70. The sum of the number of the screw rod 70 and the transverse guide 64 is equal to the number of the support arms 62. The cutting device 40 is slidably connected to the transverse guide 64.

[0325] A connecting rod structure relationship can be formed between the support 61, the support arm 62, the transverse guide member 64, the screw rod 70 and the cutting device 40, which is beneficial to further improve the connection stability among the support 61, the support arm 62, the transverse guide member 64, the screw rod 70 and the cutting device 40 and the position stability of the cutting device 40 during the rotation process relative to the support arm 62.

[0326] For some examples, see Fig.13 As shown, there are two support arms 62 . One of the two support arms 62 can be connected to the transverse guide 64 , and the other can be connected to the lead screw 70 .

[0327] A four-bar structure can be formed between the support 61, the two support arms 62, the transverse guide 64, the screw rod 70 and the cutting device 40, which is beneficial to further improve the connection stability among the support 61, the support arms 62, the transverse guide 64, the screw rod 70 and the cutting device 40 and the position stability of the cutting device 40 during the rotation process relative to the support arm 62.

[0328] In some achievable ways, Fig.14 Schematic diagram showing the partial structure of the cutting system. Fig.14 As shown, the support arm 62 includes a transverse connecting arm 621, a first sub-support arm 622 and a second sub-support arm 623. The first sub-support arm 622 is arranged on one side of the transverse connecting arm 621, and the second sub-support arm 623 is arranged on the other side. The first sub-support arm 622 is rotatably connected to the support 61. The transverse connecting arm 621 is connected to the driving unit. The second sub-support arm 623 is located on the side of the transverse connecting arm 621 facing away from the support 61. The end of the screw rod 70 is fixedly connected to the second sub-support arm 623.

[0329] By applying torque to the transverse connecting arm 621, the support arm 62 can be driven to rotate relative to the support 61, which is conducive to improving the overall structural compactness of the support arm 62 and taking up less space. The way in which the end of the screw rod 70 is connected to the second sub-support arm 623 effectively ensures the stability and reliability of the connection between the screw rod 70 and the support arm 62. The way in which the end of the transverse guide member 64 is rotatably connected to the second sub-support arm 623 effectively ensures the stability and reliability of the connection between the transverse guide member 64 and the support arm 62.

[0330] In some examples, in each support arm 62 , the number of the first sub-support arms 622 and the number of the second sub-support arms 623 are both one.

[0331] For some examples, see Fig.14 As shown, the number of the support arm 62 can be one, which is beneficial to reducing the number of parts used and to making the structure of the cutting system 20 itself compact.

[0332] In some examples, Fig.15 Schematic diagram showing the partial structure of the cutting system. Fig.15 As shown, the number of support arms 62 is at least two. Each support arm 62 is arranged at intervals along the vertical direction Y. The position adjustment device 50 also includes a transverse guide 64. The second sub-support arms 623 in a part of the support arms 62 can be rotatably connected to the transverse guide 64. The second sub-support arms 623 in a part of the support arms 62 are fixedly connected to the screw rod 70. The sum of the number of the screw rod 70 and the transverse guide 64 is equal to the number of the support arms 62. The cutting device 40 can be slidably connected to the transverse guide 64.

[0333] A connecting rod structure relationship can be formed between the support 61, the support arm 62, the transverse guide member 64, the screw rod 70 and the cutting device 40, which is beneficial to further improve the connection stability among the support 61, the support arm 62, the transverse guide member 64, the screw rod 70 and the cutting device 40 and the position stability of the cutting device 40 during the rotation process relative to the support arm 62.

[0334] For some examples, see Fig.15 As shown, there are two support arms 62 . One of the two support arms 62 can be connected to the transverse guide 64 , and the other can be connected to the lead screw 70 .

[0335] Fig.16 Schematic diagram showing the partial structure of the cutting system. Fig.16 As shown, the embodiment of the present application provides a cutting system 20 for a lawn mower 10. The cutting system 20 includes a cutting device 40 and a position adjustment device 50. The position adjustment device 50 includes a support arm 62, a support 61, a drive unit, a screw rod 70 and a drive device 100.

[0336] One end of the support arm 62 is rotatably connected to the support 61, and the other end of at least one support arm 62 is connected to the screw rod 70. The screw rod 70 is rotatably connected to the support arm 62. The screw rod 70 is connected to the driving device 100. The cutting device 40 is threadedly connected to the screw rod 70 so that the cutting device 40 and the screw rod 70 are threadedly transmitted. The driving unit is used to drive the support arm 62 to rotate relative to the support 61 to adjust the height of the cutting device 40 above the ground. The driving device 100 is used to drive the screw rod 70 to rotate relative to the support arm 62, and the screw rod 70 drives the cutting device 40 to move laterally.

[0337] In some possible implementations, see Fig.16 As shown, the number of the support arm 62 can be one, which is beneficial to reducing the number of parts used and to making the structure of the cutting system 20 itself compact.

[0338] In some achievable ways, Fig.17Schematic diagram showing the partial structure of the cutting system. Fig.17 As shown, the number of the support arms 62 is at least two. The support arms 62 are arranged at intervals along the vertical direction Y. One end of each support arm 62 is rotatably connected to the support 61. The position adjustment device 50 also includes a transverse guide 64. The other end of a part of the support arms 62 is rotatably connected to the transverse guide 64. The other end of a part of the support arms 62 is rotatably connected to the screw rod 70. The sum of the number of the screw rod 70 and the transverse guide 64 is equal to the number of the support arms 62. The cutting device 40 is slidably connected to the transverse guide 64.

[0339] A connecting rod structure relationship can be formed between the support 61, the support arm 62, the transverse guide member 64, the screw rod 70 and the cutting device 40, which is beneficial to further improve the connection stability between the support 61, the two support arms 62, the transverse guide member 64, the screw rod 70 and the cutting device 40, as well as the position stability of the cutting device 40 during the rotation process relative to the support arm 62.

[0340] For some examples, see Fig.17 As shown, there are two support arms 62 . One of the two support arms 62 can be connected to the transverse guide 64 , and the other can be connected to the lead screw 70 .

[0341] In some achievable ways, Fig.18 Schematic diagram showing the partial structure of the cutting system. Fig.18 As shown, the support arm 62 includes a transverse connecting arm 621, a first sub-support arm 622 and a second sub-support arm 623. The first sub-support arm 622 is arranged on one side of the transverse connecting arm 621, and the second sub-support arm 623 is arranged on the other side. The first sub-support arm 622 is rotatably connected to the support 61. The transverse connecting arm 621 is connected to the driving unit. The second sub-support arm 623 is located on the side of the transverse connecting arm 621 facing away from the support 61. The end of the screw rod 70 is rotatably connected to the second sub-support arm 623.

[0342] By applying torque to the transverse connecting arm 621, the support arm 62 can be driven to rotate relative to the support 61, which is conducive to improving the overall structural compactness of the support arm 62 and taking up less space. The way in which the end of the screw rod 70 is connected to the second sub-support arm 623 effectively ensures the stability and reliability of the connection between the screw rod 70 and the support arm 62. The way in which the end of the transverse guide member 64 is rotatably connected to the second sub-support arm 623 effectively ensures the stability and reliability of the connection between the transverse guide member 64 and the support arm 62.

[0343] In some possible implementations, see Fig.18 As shown, the number of the support arm 62 can be one, which is beneficial to reducing the number of parts used and to making the structure of the cutting system 20 itself compact.

[0344] In some achievable embodiments, in each support arm 62 , the number of the first sub-support arms 622 and the number of the second sub-support arms 623 are both one.

[0345] In some achievable ways, Fig.19 Schematic diagram showing the partial structure of the cutting system. Fig.19 As shown, the number of support arms 62 is at least two. Each support arm 62 is arranged at intervals along the vertical direction Y. The position adjustment device 50 also includes a transverse guide 64. The second sub-support arms 623 in a part of the support arms 62 can be rotatably connected to the transverse guide 64. The second sub-support arms 623 in a part of the support arms 62 can be rotatably connected to the screw rod 70. The sum of the number of the screw rod 70 and the transverse guide 64 is equal to the number of the support arms 62. The cutting device 40 can be slidably connected to the transverse guide 64.

[0346] A connecting rod structure relationship can be formed between the support 61, the support arm 62, the transverse guide member 64, the screw rod 70 and the cutting device 40, which is beneficial to further improve the connection stability among the support 61, the support arm 62, the transverse guide member 64, the screw rod 70 and the cutting device 40 and the position stability of the cutting device 40 during the rotation process relative to the support arm 62.

[0347] For some examples, see Fig.19 As shown, there are two support arms 62 . One of the two support arms 62 can be connected to the transverse guide 64 , and the other can be connected to the lead screw 70 .

[0348] In some possible implementations, see Fig.19 As shown, the screw rod 70 and the drive device 100 are connected to the same support arm 62. The screw rod 70 and the drive device 100 can move synchronously with the support arm 62, which reduces the difficulty of arranging the drive device 100 and reduces the complexity of the connection between the drive device 100 and the support arm 62.

[0349] The embodiment of the present application provides a lawn mower 10. The lawn mower 10 includes a body 30 and a cutting system 20. The cutting system 20 includes a cutting device 40 and a position adjustment device 50. The position adjustment device 50 includes a support arm 62, a support 61, a driving unit, a screw 70 and a driving device 100.

[0350] One end of the support arm 62 is rotatably connected to the support 61, and the other end of at least one support arm 62 is connected to the screw rod 70. The end of the screw rod 70 is fixedly connected to the support arm 62. The cutting device 40 is fixedly connected to the driving device 100. The driving device 100 is inserted into the screw rod 70, and the driving device 100 is threadedly connected to the screw rod 70 so that the driving device 100 and the screw rod 70 are threadedly transmitted. Among them, the driving unit is used to drive the support arm 62 to rotate relative to the support 61 to adjust the height of the cutting device 40 above the ground. When the driving device 100 moves laterally relative to the screw rod 70, it drives the cutting device 40 to move laterally relative to the fuselage 30 synchronously.

[0351] The embodiment of the present application provides a lawn mower 10 . The lawn mower 10 includes a body 30 and a cutting system 20 .

[0352] The cutting system 20 includes a cutting device 40 and a position adjustment device 50. The position adjustment device 50 includes a support arm 62, a support 61, a driving unit, a screw rod 70 and a driving device 100.

[0353] One end of the support arm 62 is rotatably connected to the support 61, and the other end of at least one support arm 62 is connected to the screw rod 70. The screw rod 70 is rotatably connected to the support arm 62. The screw rod 70 is connected to the driving device 100. The cutting device 40 is threadedly connected to the screw rod 70 so that the cutting device 40 and the screw rod 70 are threadedly transmitted. The driving unit is used to drive the support arm 62 to rotate relative to the support 61 to adjust the height of the cutting device 40 above the ground. The driving device 100 is used to drive the screw rod 70 to rotate relative to the support arm 62, and the screw rod 70 drives the cutting device 40 to move laterally relative to the fuselage 30.

[0354] The embodiment of the present application provides a lawn mower 10 . The lawn mower 10 includes a body 30 and a cutting system 20 .

[0355] The body 30 includes a first lower edge 311. The cutting system 20 is disposed on the body 30. The cutting system 20 includes a cutting device 40 and a position adjustment device 50. The position adjustment device 50 includes a support arm 62, a support 61, a driving unit, a screw rod 70 and a driving device 100.

[0356] One end of the support arm 62 is rotatably connected to the support 61, and the other end of at least one support arm 62 is connected to the screw rod 70. The end of the screw rod 70 is fixedly connected to the support arm 62. The cutting device 40 is fixedly connected to the driving device 100. The driving device 100 is inserted into the screw rod 70, and the driving device 100 is threadedly connected to the screw rod 70, so that the driving device 100 and the screw rod 70 are threadedly transmitted.

[0357] The driving unit is used to drive the support arm 62 to rotate relative to the support 61 to adjust the height of the cutting device 40 relative to the ground. When the driving device 100 moves laterally relative to the screw rod 70, it drives the cutting device 40 to move laterally relative to the body 30 synchronously, so that the cutting device 40 moves between the center position of the body 30 and the side cutting position of the body 30.

[0358] The cutting device 40 includes a blade disc 42 and a blade disc cover 43. The blade disc 42 is located in the blade disc cover 43. The blade disc 42 includes a blade 421. The blade disc cover 43 has a second lower edge 43a. When the cutting device 40 is located at the edge cutting position, along the vertical direction Y, the second lower edge 43a is lower than the first lower edge 311, and the second lower edge 43a is lower than the lower surface of the blade 421.

[0359] The embodiment of the present application provides a lawn mower 10 . The lawn mower 10 includes a body 30 and a cutting system 20 .

[0360] The body 30 includes a first lower edge 311. The cutting system 20 is disposed on the body 30. The cutting system 20 includes a cutting device 40 and a position adjustment device 50. The position adjustment device 50 includes a support arm 62, a support 61, a driving unit, a screw rod 70 and a driving device 100.

[0361] One end of the support arm 62 is rotatably connected to the support 61, and the other end of at least one support arm 62 is connected to the screw rod 70. The screw rod 70 is rotatably connected to the support arm 62. The screw rod 70 is connected to the driving device 100. The cutting device 40 is threadedly connected to the screw rod 70, so that the cutting device 40 and the screw rod 70 are threadedly transmitted.

[0362] The driving unit is used to drive the support arm 62 to rotate relative to the support 61 to adjust the height of the cutting device 40 relative to the ground. The driving device 100 is used to drive the screw rod 70 to rotate relative to the support arm 62. The screw rod 70 drives the cutting device 40 to move laterally relative to the fuselage 30, so that the cutting device 40 moves between the center position of the fuselage 30 and the side cutting position of the fuselage 30.

[0363] The cutting device 40 includes a blade disc 42 and a blade disc cover 43. The blade disc 42 is located in the blade disc cover 43. The blade disc 42 includes a blade 421. The blade disc cover 43 has a second lower edge 43a. When the cutting device 40 is located at the edge cutting position, along the vertical direction Y, the second lower edge 43a is lower than the first lower edge 311, and the second lower edge 43a is lower than the lower surface of the blade 421.

[0364] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances. The embodiments of the present application do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0365] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, systems, products or devices.

[0366] The term "plurality" in this article refers to two or more than two. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship; in a formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship.

[0367] It is understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. It is understood that in the embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A cutting system for a lawn mower, characterized in that: The cutting system comprises: Cutting device; A position adjustment device, comprising a support arm, a support, a drive unit, a lead screw and a drive device; One end of the support arm is rotatably connected to the support, the other end of at least one of the support arms is connected to the screw rod, the end of the screw rod is fixedly connected to the support arm, the cutting device is fixedly connected to the driving device, the driving device is inserted into the screw rod, and the driving device is threadedly connected to the screw rod, so that the driving device and the screw rod are threadedly transmitted; Wherein, the driving unit is used to drive the support arm to rotate relative to the support so as to adjust the height of the cutting device relative to the ground. When the driving device moves laterally relative to the screw rod, it drives the cutting device to move laterally synchronously.

2. The cutting system according to claim 1, characterized in that: The number of the support arms is at least two, and the support arms are spaced apart in the vertical direction. One end of each support arm is rotatably connected to the support. The position adjustment device also includes a transverse guide. The other ends of some of the support arms are rotatably connected to the transverse guide, and the other ends of some of the support arms are fixedly connected to the screw rod. The sum of the number of the screw rods and the transverse guide rods is equal to the number of the support arms. The cutting device is slidably connected to the transverse guide rod.

3. The cutting system according to claim 1, characterized in that: The support arm includes a transverse connecting arm, a first sub-support arm and a second sub-support arm. The first sub-support arm is arranged on one side of the transverse connecting arm, and the second sub-support arm is arranged on the other side. The first sub-support arm is rotatably connected to the support, the transverse connecting arm is connected to the driving unit, and the second sub-support arm is located on the side of the transverse connecting arm facing away from the support, and the end of the screw rod is fixedly connected to the second sub-support arm.

4. The cutting system according to claim 3, characterized in that: In the support arm, the number of the second sub-support arms is two, and the two ends of the screw rod are fixedly connected to the two second sub-support arms respectively.

5. The cutting system according to claim 3, characterized in that: The number of the support arms is at least two, and the support arms are spaced apart in the vertical direction. The position adjustment device also includes a transverse guide. The second sub-support arms in a part of the support arms are rotatably connected to the transverse guide, and the second sub-support arms in a part of the support arms are fixedly connected to the screw rod. The sum of the number of the screw rods and the transverse guides is equal to the number of the support arms, and the cutting device is slidably connected to the transverse guide.

6. The cutting system according to claim 5, characterized in that: In each of the support arms, the number of the second sub-support arms is two, the two ends of the screw rod are respectively fixedly connected to the two second sub-support arms in the corresponding support arms, and the two ends of the transverse guide member are rotatably connected to the two second sub-support arms in the corresponding support arms.

7. The cutting system according to claim 2 or 5, characterized in that: The cutting device also includes a sliding connector, which can be slidably connected to the transverse guide member. There are two sliding connectors, which are arranged at intervals, and at least part of the driving device is located in the space formed between the two sliding connectors.

8. The cutting system according to claim 7, characterized in that: The sliding connection member includes an axial hole and an avoidance hole. The transverse guide member is inserted into the axial hole so that the sliding connection member and the transverse guide member can be slidably matched. The screw rod is inserted into the avoidance hole, and the avoidance hole is used to avoid the screw rod.

9. The cutting system according to claim 7, characterized in that: The position adjustment device further comprises a mounting bracket, wherein the mounting bracket is connected to the sliding connection member, and the driving device is connected to the mounting bracket.

10. The cutting system according to claim 1, characterized in that: The driving device comprises a driving gear and a driven gear, the driving gear meshes with the driven gear for transmission, the driven gear has an internal threaded hole, and the lead screw is threadedly connected to the internal threaded hole.

11. A cutting system for a lawn mower, characterized in that: The cutting system comprises: Cutting device; A position adjustment device, comprising a support arm, a support, a drive unit, a lead screw and a drive device; One end of the support arm is rotatably connected to the support, the other end of at least one of the support arms is connected to the screw rod, the screw rod is rotatably connected to the support arm, the screw rod is connected to the driving device, and the cutting device is threadedly connected to the screw rod, so that the cutting device and the screw rod are threadedly transmitted; Wherein, the driving unit is used to drive the support arm to rotate relative to the support to adjust the height of the cutting device above the ground, and the driving device is used to drive the screw to rotate relative to the support arm, and the screw drives the cutting device to move laterally.

12. The cutting system according to claim 11, characterized in that The number of the support arms is at least two, and the support arms are spaced apart in the vertical direction. One end of each support arm can be rotatably connected to the support. The position adjustment device also includes a transverse guide. The other end of a part of the support arms can be rotatably connected to the transverse guide. The other end of a part of the support arms can be rotatably connected to the screw rod. The sum of the number of the screw rods and the transverse guide rods is equal to the number of the support arms. The cutting device can be slidably connected to the transverse guide rod.

13. The cutting system according to claim 11, characterized in that The support arm includes a transverse connecting arm, a first sub-support arm and a second sub-support arm. The first sub-support arm is arranged on one side of the transverse connecting arm, and the second sub-support arm is arranged on the other side. The first sub-support arm is rotatably connected to the support, the transverse connecting arm is connected to the driving unit, and the second sub-support arm is located on the side of the transverse connecting arm facing away from the support, and the end of the screw rod is rotatably connected to the second sub-support arm.

14. The cutting system according to claim 13, characterized in that In the support arm, the number of the second sub-support arms is two, and the two ends of the screw rod are rotatably connected to the two second sub-support arms respectively.

15. The cutting system according to claim 13, characterized in that The number of the support arms is at least two, and the support arms are spaced apart in the vertical direction. The position adjustment device also includes a transverse guide. The second sub-support arms in a part of the support arms can be rotatably connected to the transverse guide. The second sub-support arms in a part of the support arms can be rotatably connected to the screw rod. The sum of the number of the screw rods and the transverse guide rods is equal to the number of the support arms. The cutting device can be slidably connected to the transverse guide rod.

16. The cutting system according to claim 15, characterized in that In each of the support arms, the number of the second sub-support arms is two, the two ends of the screw rod are rotatably connected to the two second sub-support arms in the corresponding support arms, and the two ends of the transverse guide member are rotatably connected to the two second sub-support arms in the corresponding support arms.

17. The cutting system according to claim 12 or 15, characterized in that: The cutting device comprises an axial hole and a threaded hole. The transverse guide member is passed through the axial hole so that the cutting device and the transverse guide member can be slidably matched. The screw rod is threadedly connected to the threaded hole.

18. The cutting system according to claim 11, characterized in that The screw rod and the driving device are connected to the same supporting arm.

19. The cutting system according to claim 2, 5, 12 or 15, characterized in that The number of the support arms is two, the upper support arm is provided with the screw rod, and the lower support arm is provided with the transverse guide member.

20. The cutting system according to claim 3 or 13, characterized in that: In at least one of the support arms, the number of the second sub-support arms is two, and an accommodation portion is formed between the two second sub-support arms of each of the support arms. The screw rod is arranged corresponding to the accommodation portion, and the cutting device is passed through the accommodation portion.

21. The cutting system according to claim 20, characterized in that The cutting device includes a driver, a blade cover and a blade, the blade cover is connected to the driver, the blade is arranged below the blade cover, the blade is connected to the output shaft of the driver, the support arm includes a receiving portion, and the driver is inserted into the receiving portion.

22. The cutting system according to claim 3 or 13, characterized in that: In at least one of the support arms, the number of the first sub-support arms is two, the two first sub-support arms of each of the support arms are rotatably connected to the support, and at least a part of the driving unit is located between the two first sub-support arms.

23. The cutting system according to claim 22, characterized in that The number of the supports is two, the two first sub-support arms of each support arm are rotatably connected to the two supports respectively, and at least a part of the driving unit is located between the two supports.

24. The cutting system according to claim 3 or 13, characterized in that: The driving unit comprises a cam, the cam comprises a helical surface, and the transverse connecting arm abuts against the helical surface.

25. A lawn mower, characterized in that: Comprising a cutting system as claimed in any one of claims 1 to 24.

26. A lawn mower, characterized in that: include: body; A cutting system, including a cutting device and a position adjustment device; The position adjustment device comprises a support arm, a support, a drive unit, a screw rod and a drive device; One end of the support arm is rotatably connected to the support, the other end of at least one of the support arms is connected to the screw rod, the end of the screw rod is fixedly connected to the support arm, the cutting device is fixedly connected to the driving device, the driving device is inserted into the screw rod, and the driving device is threadedly connected to the screw rod, so that the driving device and the screw rod are threadedly transmitted; Wherein, the driving unit is used to drive the support arm to rotate relative to the support so as to adjust the height of the cutting device relative to the ground. When the driving device moves laterally relative to the screw rod, it drives the cutting device to move laterally synchronously.

27. A lawn mower, characterized in that: include: body; A cutting system, including a cutting device and a position adjustment device; The position adjustment device comprises a support arm, a support, a drive unit, a screw rod and a drive device; One end of the support arm is rotatably connected to the support, the other end of at least one of the support arms is connected to the screw rod, the screw rod is rotatably connected to the support arm, the screw rod is connected to the driving device, and the cutting device is threadedly connected to the screw rod, so that the cutting device and the screw rod are threadedly transmitted; Wherein, the driving unit is used to drive the support arm to rotate relative to the support to adjust the height of the cutting device above the ground, and the driving device is used to drive the screw to rotate relative to the support arm, and the screw drives the cutting device to move laterally.

28. A lawn mower according to claim 26 or 27, characterised in that The cutting device comprises a blade, and the driving device drives the cutting device to move laterally. The cutting device drives the blade to move laterally synchronously, so that at least a part of the blade moves outside the positive projection of the fuselage toward the ground.

29. The lawn mower according to claim 28, characterized in that A portion of the screw rod extends out of the orthographic projection of the fuselage toward the ground.

30. A lawn mower according to claim 26 or 27, characterized in that The cutting device includes a blade, and the driving device drives the cutting device to move laterally. The cutting device drives the blade to move laterally within the orthographic projection of the fuselage toward the ground, and the minimum horizontal distance between the outer edge of the blade and the side edge of the orthographic projection of the fuselage toward the ground is greater than or equal to 0 mm and less than or equal to 50 mm.

31. A lawn mower, characterized in that: include: a fuselage, including a first lower edge; A cutting system, arranged on the fuselage, the cutting system comprising a cutting device and a position adjustment device; The position adjustment device comprises a support arm, a support, a drive unit, a screw rod and a drive device; One end of the support arm is rotatably connected to the support, the other end of at least one of the support arms is connected to the screw rod, the end of the screw rod is fixedly connected to the support arm, the cutting device is fixedly connected to the driving device, the driving device is inserted into the screw rod, and the driving device is threadedly connected to the screw rod, so that the driving device and the screw rod are threadedly transmitted; Wherein, the driving unit is used to drive the support arm to rotate relative to the support to adjust the height of the cutting device relative to the ground, and when the driving device moves laterally relative to the screw rod, it drives the cutting device to move laterally synchronously, so that the cutting device moves between the center position of the fuselage and the side cutting position of the fuselage; The cutting device includes a blade disc and a blade disc cover, wherein the blade disc is located inside the blade disc cover, the blade disc includes a blade, and the blade disc cover has a second lower edge. When the cutting device is located at the edge cutting position, along the vertical direction, the second lower edge is lower than the first lower edge, and the second lower edge is lower than the lower surface of the blade.

32. A lawn mower, characterized in that: include: a fuselage, including a first lower edge; A cutting system, arranged on the fuselage, the cutting system comprising a cutting device and a position adjustment device; The position adjustment device comprises a support arm, a support, a drive unit, a screw rod and a drive device; One end of the support arm is rotatably connected to the support, the other end of at least one of the support arms is connected to the screw rod, the screw rod is rotatably connected to the support arm, the screw rod is connected to the driving device, and the cutting device is threadedly connected to the screw rod, so that the cutting device and the screw rod are threadedly transmitted; The driving unit is used to drive the support arm to rotate relative to the support to adjust the height of the cutting device relative to the ground, and the driving device is used to drive the screw rod to rotate relative to the support arm, and the screw rod drives the cutting device to move laterally, so that the cutting device moves between the center position of the fuselage and the side cutting position of the fuselage; The cutting device includes a blade disc and a blade disc cover, wherein the blade disc is located inside the blade disc cover, the blade disc includes a blade, and the blade disc cover has a second lower edge. When the cutting device is located at the edge cutting position, along the vertical direction, the second lower edge is lower than the first lower edge, and the second lower edge is lower than the lower surface of the blade.

33. A lawn mower according to claim 31 or 32, characterized in that The fuselage includes a side skirt panel. When the cutting device is in the edge cutting position, the minimum horizontal distance between the outer edge of the blade and the side skirt panel along a direction perpendicular to the side skirt panel is greater than or equal to 10 mm and less than or equal to 50 mm.

34. A lawn mower according to claim 31 or 32, characterized in that The fuselage includes a side skirt plate, and when the cutting device is at the center position, the minimum horizontal distance between the outer edge of the blade and the side skirt plate along the direction perpendicular to the side skirt plate is D; When the cutting device is in the edge cutting position of the fuselage, the minimum horizontal distance between the outer edge of the blade and the side skirt along the direction perpendicular to the side skirt is d; The value of D is greater than the value of d.

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