Foldable multi-mode grass cutting device

Abstract

The application discloses a foldable multi-mode grass cutting device, which comprises a middle cutting mechanism, side cutting mechanisms rotatably connected to opposite sides of the middle cutting mechanism, and a locking mechanism; the middle cutting mechanism comprises a middle cutting knife capable of moving back and forth laterally and a power module for driving the middle cutting knife to move back and forth laterally; each of the side cutting mechanisms is rotatable to be folded onto the middle cutting mechanism, and each of the side cutting mechanisms comprises a side cutting knife capable of moving back and forth laterally; one part of the locking mechanism is arranged on the middle cutting knife, and the other part of the locking mechanism is arranged on the side cutting knife; the locking mechanism is used for fixing and releasing the connection between the middle cutting knife and the side cutting knife; the scheme improves the grass cutting efficiency of the grass cutting machine and solves the contradiction between the large grass cutting area of the grass cutting machine during grass cutting and the small grass cutting area of the grass cutting machine during no grass cutting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mowing, in particular to a foldable multi-mode mowing device. BACKGROUND

[0002] With the development of industrialization and economy, the per capita greening area of urban residents is growing, and the scale of lawn mowing is expanding. The traditional manual mowing method cannot meet the demand. The mowing machine as a kind of mechanical industry to liberate labor force emerges as the times require. The mowing device as the main device of the mowing machine plays an important role in the efficiency and safety of mowing.

[0003] Due to the efficiency problem of the mowing machine, the mowing device has a large volume and a large floor area, and can only work in a single terrain. When there is an obstacle, it cannot pass. Small mowing machines can solve this problem, but due to their small size, the mowing efficiency is low, and they are not suitable for mowing in parks, football fields and other places.

[0004] Therefore, a mowing device with small size and high mowing efficiency can solve this problem. SUMMARY

[0005] The purpose of the present application is to provide a foldable multi-mode mowing device to solve the problem that the existing mowing machine cannot have small size and high efficiency.

[0006] In order to solve the above technical problems, the present application provides a foldable multi-mode mowing device, which comprises a middle cutting mechanism, a side cutting mechanism rotatably connected to the opposite sides of the middle cutting mechanism, and a locking mechanism. The middle cutting mechanism comprises a middle cutting knife that can move back and forth horizontally, and a power module for driving the middle cutting knife to move back and forth horizontally. Both of the side cutting mechanisms are structures that can be folded onto the middle cutting mechanism, and both of the side cutting mechanisms comprise a side cutting knife that can move back and forth horizontally. A part of the locking mechanism is arranged on the middle cutting knife, and another part of the locking mechanism is arranged on the side cutting knife. The locking mechanism is used to fix and release the connection between the middle cutting knife and the side cutting knife.

[0007] In one embodiment, the middle cutting knife comprises a middle fixed blade and a middle movable blade arranged oppositely, the middle fixed blade is fixedly installed on the middle cutting mechanism, and the middle movable blade is arranged on the middle fixed blade in a way that can move back and forth horizontally. The power module is used to drive the middle movable blade to move back and forth horizontally.

[0008] In one of the embodiments, the side cutting knife comprises oppositely arranged side fixed blade and side moving blade, the side fixed blade is fixedly installed on the side cutting mechanism, the side moving blade is movably arranged on the side fixed blade; one part of the locking mechanism is arranged on the middle moving blade, the other part of the locking mechanism is arranged on the side moving blade, the locking mechanism is used for fixing and releasing the connection between the middle moving blade and the side moving blade.

[0009] In one of the embodiments, the power module comprises power motor, driving bevel gear, driven bevel gear, swing rod and fixed seat; the power motor is used for driving the driving bevel gear to rotate; the driving bevel gear is in mesh transmission with the driven bevel gear; the driven bevel gear is provided with transmission shaft extending along the axial direction thereof, the transmission shaft is provided with annular groove arranged around the wall thereof, the annular groove is arranged obliquely relative to the axial direction of the transmission shaft; the swing rod is provided with loop, the loop is sleeved in the annular groove; the other end of the swing rod is movably connected to the fixed seat; the fixed seat is connected with the middle moving blade.

[0010] In one of the embodiments, the shell of the middle cutting mechanism is rotationally connected with the shell of the side cutting mechanism, and the connection part is provided with folding transmission mechanism, the folding transmission mechanism is used for driving the side cutting mechanism to fold on the middle cutting mechanism.

[0011] In one of the embodiments, the folding transmission mechanism comprises folding motor, driving folding gear and driven folding gear, the folding motor is used for driving the driving folding gear to rotate, the driving folding gear is in mesh transmission with the driven folding gear; one of the middle cutting mechanism and the side cutting mechanism is provided with the folding motor, the other of the middle cutting mechanism and the side cutting mechanism is provided with the driven folding gear.

[0012] In one of the embodiments, the locking mechanism comprises first connecting seat and second connecting seat, one of the middle cutting knife and the side cutting knife is provided with the first connecting seat, the other of the middle cutting knife and the side cutting knife is provided with the second connecting seat, the first connecting seat and the second connecting seat are releasably connected.

[0013] In one of the embodiments, the first connecting seat and the second connecting seat are in plug-in connection, and the first connecting seat and the second connecting seat are in structure of realizing connection fixed state switching by electromagnetic attraction.

[0014] In one of the embodiments, the first connecting seat is provided with an insertion slot, the slot opening of the insertion slot is smaller than the internal radial dimension of the insertion slot, and the insertion slot is provided with an electromagnet; the second connecting seat is provided with a guide slot penetrating therethrough, the side wall of the guide slot is provided with a positioning hole penetrating through the second connecting seat, and the guide slot is provided with a spring; the spring is sleeved with a connecting rod which can move towards and away from the first connecting seat, and the spring is used to apply a pushing force to the connecting rod to push it away from the first connecting seat; the connecting rod is made of a material which can be magnetically attracted, the connecting rod is concave on the peripheral wall to form a guide groove, and the guide groove is placed with a ball; when the connecting rod is not moved out of the guide slot, the guide groove is used to push the ball partially out of the positioning hole; when the connecting rod is moved out of the guide slot, the guide groove is used to hide the ball in the guide slot.

[0015] In one of the embodiments, the side cutting mechanism further comprises a positioning rudder and a positioning rod, and the positioning rudder is used to drive the positioning rod to move into and out of the blade teeth of the side cutting knife.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. When the harvester needs to pass through a relatively narrow area, it can smoothly pass through by folding the left and right side cutting mechanisms, which is very convenient for placing the mower indoors or in a warehouse.

[0018] 2. When an obstacle appears on the left or right side during mowing, the side cutting mechanism can be folded to avoid the obstacle, saving the travel of the wheels during mowing and saving time, which will be very friendly in automatic mowers.

[0019] 3. The multiple working modes of the mower can well adapt to various terrains, and in a large football field, the working mode in the fully expanded state can be adopted.

[0020] 4. The overall modular design of the mower can be well matched with other devices, and in the future, there will be more application scenarios in multifunctional robots.

[0021] 5. The efficiency of the mower is further improved, and the contradiction between the large cutting area of the mower during mowing and the small cutting area of the mower during non-mowing is solved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the present application, the drawings required to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0023] Figure 1 is a structural schematic diagram provided by the embodiment of the present application;

[0024] Figure 2 is a front view structural schematic diagram of Figure 1 ;

[0025] Figure 3 is a left side cutting mechanism folded state schematic diagram of Figure 1 ;

[0026] Figure 4 is a right side cutting mechanism folded state schematic diagram of Figure 1 ;

[0027] Figure 5 is a both side cutting mechanism folded state schematic diagram of Figure 1 ;

[0028] Figure 6 is a middle cutting mechanism internal structure schematic diagram of Figure 1 ;

[0029] Figure 7 is a transmission shaft structure schematic diagram of Figure 6 ;

[0030] Figure 8 is a bottom view structural schematic diagram of Figure 1 ;

[0031] Figure 9 is a side cutting mechanism structure schematic diagram of Figure 1 ;

[0032] Figure 10 is a disassembled structural schematic diagram of Figure 9 ;

[0033] Figure 11 is a locking mechanism setting structure schematic diagram of Figure 1 ;

[0034] Figure 12 is a locking mechanism cross-sectional structure schematic diagram of Figure 11 ;

[0035] Figure 13 is a locking mechanism application state schematic diagram of the present application embodiment Figure 1 ;

[0036] Figure 14The application state of the locking mechanism provided by the embodiment of the application Figure 2 .

[0037] The reference signs are as follows:

[0038] 10, middle cutting mechanism; 11, middle cutting knife; 111, middle fixed blade; 112, middle moving blade; 12, power module; 121, power motor; 122, driving bevel gear; 123, driven bevel gear; 124, swing rod; 125, fixed seat; 126, transmission shaft; 127, annular groove; 128, collar; 13, track

[0039] 20, side cutting mechanism; 21, side cutting knife; 211, side fixed blade; 212, side moving blade; 22, positioning steering engine; 23, positioning rod

[0040] 30, locking mechanism; 31, first connecting seat; 311, insertion slot; 32, second connecting seat; 321, guide slot; 322, positioning hole; 33, electromagnet; 34, spring; 35, connecting rod; 351, guide groove; 36, ball

[0041] 40, folding transmission mechanism; 41, folding motor; 42, driving folding gear; 43, driven folding gear DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application.

[0043] The application provides a foldable multi-mode grass cutting device, and an embodiment thereof is shown in Figures 1 to 14 The grass cutting device comprises a middle cutting mechanism 10, side cutting mechanisms 20 rotatably connected to opposite sides of the middle cutting mechanism 10, and a locking mechanism 30. The middle cutting mechanism 10 comprises a middle cutting knife 11 that can move back and forth laterally, and a power module 12 for driving the middle cutting knife 11 to move back and forth laterally. Each of the side cutting mechanisms 20 is a structure that can be folded to the middle cutting mechanism 10, and each of the side cutting mechanisms 20 comprises a side cutting knife 21 that can move back and forth laterally. Part of the locking mechanism 30 is arranged on the middle cutting knife 11, and another part of the locking mechanism 30 is arranged on the side cutting knife 21. The locking mechanism 30 is used for fixing and releasing the connection between the middle cutting knife 11 and the side cutting knife 21.

[0044] After the above arrangement is adopted, the grass cutting device has multiple working modes. For example, when large-area grass cutting is needed, the grass cutting device can be completely unfolded into the state shown in Figure 1 and Figure 2 When obstacle avoidance is needed on one side, the grass cutting device can be folded into the state shown inFigure 3 or Figure 4 as shown in the state, when the need for a narrower space for mowing, then the folding mower device for Figure 5 as shown in the state, so that the device can be adapted to a variety of application scenarios.

[0045] As Figure 2 and Figure 6 shown, the embodiment of the middle cutting knife 11 includes a relative arrangement of the middle fixed blade 111 and the middle moving blade 112, the middle fixed blade 111 is fixedly installed on the middle cutting mechanism 10, and the middle moving blade 112 is arranged on the middle fixed blade 111 in a transversely reciprocating manner; the power module 12 is used to drive the middle moving blade 112 to move transversely.

[0046] After using the above arrangement, the middle fixed blade 111 and the middle moving blade 112 will produce transverse relative movement, so the relative movement of the two will realize the mowing operation of the middle cutting knife 11.

[0047] As Figure 2 , Figure 9 and Figure 11 shown, the embodiment of the side cutting knife 21 includes a relative arrangement of the side fixed blade 211 and the side moving blade 212, the side fixed blade 211 is fixedly installed on the side cutting mechanism 20, and the side moving blade 212 is arranged on the side fixed blade 211 in a transversely reciprocating manner; a part of the locking mechanism 30 is arranged on the middle moving blade 112, and another part of the locking mechanism 30 is arranged on the side moving blade 212, and the locking mechanism 30 is used to fix and release the connection between the middle moving blade 112 and the side moving blade 212.

[0048] After using the above arrangement, the side fixed blade 211 and the side moving blade 212 will produce transverse relative movement, so the relative movement of the two will realize the mowing operation of the side cutting knife 21; and since the locking mechanism 30 is used to fix and release the connection between the middle moving blade 112 and the side moving blade 212, when the locking mechanism 30 fixes the connection between the middle moving blade 112 and the side moving blade 212, the power module 12 drives the middle moving blade 112 to move, which can simultaneously drive the movement of the side moving blade 212, that is, to realize the power supply of the middle cutting mechanism 10 and the side cutting mechanism 20 by one power module 12.

[0049] As Figure 6 and Figure 7As shown, this embodiment includes a power module 12 comprising a power motor 121, a driving bevel gear 122, a driven bevel gear 123, a swing rod 124, and a fixed base 125. The power motor 121 drives the driving bevel gear 122 to rotate. The driving bevel gear 122 meshes with the driven bevel gear 123 for transmission. The driven bevel gear 123 has a transmission shaft 126 extending along its axial direction. The transmission shaft 126 has an annular groove 127 arranged around its peripheral wall. The annular groove 127 is obliquely arranged relative to the axial direction of the transmission shaft 126. The swing rod 124 has a collar 128, which fits into the annular groove 127. The other end of the swing rod 124 is movably connected to the fixed base 125. The fixed base 125 is connected and fixed to the central moving blade 112.

[0050] With this configuration, once the power motor 121 drives the active bevel gear 122 to rotate, the active bevel gear 122 will drive the driven bevel gear 123 to rotate. The rotation of the driven bevel gear 123 will drive the swing rod 124 to move laterally back and forth through the annular groove 127. Therefore, the central moving blade 112 will also move laterally repeatedly under the drive of the swing rod 124, thus meeting the needs of the central moving blade 112 for moving and cutting.

[0051] like Figure 1 As shown, in this embodiment, the housing of the middle cutting mechanism 10 is rotatably connected to the housing of the side cutting mechanism 20, and a folding transmission mechanism 40 is provided at the connection between the two. The folding transmission mechanism 40 is used to drive the side cutting mechanism 20 to flip and fold onto the middle cutting mechanism 10.

[0052] With this configuration, the side cutting mechanism 20 can be stored when folded upwards, and can be unfolded downwards to meet the needs of mowing large areas of grass.

[0053] like Figure 1 As shown, this embodiment sets the folding transmission mechanism 40 to include a folding motor 41, an active folding gear 42, and a driven folding gear 43. The folding motor 41 is used to drive the active folding gear 42 to rotate, and the active folding gear 42 and the driven folding gear 43 mesh and transmit power. Furthermore, one of the middle cutting mechanism 10 and the side cutting mechanism 20 is provided with a folding motor 41, and the other of the middle cutting mechanism 10 and the side cutting mechanism 20 is provided with a driven folding gear 43.

[0054] In this way, when the folding motor 41 drives the main folding gear 42 to rotate, the rotation of the main folding gear 42 will drive the driven folding gear 43 to rotate, so that the rotation of the driven folding gear 43 in one direction can fold the side cutting mechanism 20 upward, and the rotation of the driven folding gear 43 in the other direction can unfold the side cutting mechanism 20.

[0055] As shown in Figures 11 to 14 The locking mechanism 30 of this embodiment includes a first connecting seat 31 and a second connecting seat 32, one of the middle cutting knife 11 and the side cutting knife 21 is provided with the first connecting seat 31, and the other of the middle cutting knife 11 and the side cutting knife 21 is provided with the second connecting seat 32, and the first connecting seat 31 and the second connecting seat 32 are connected and fixed in a releasable manner.

[0056] In this way, when the first connecting seat 31 and the second connecting seat 32 are connected and fixed, the middle cutting knife 11 and the side cutting knife 21 can be connected as a whole to realize synchronous driving of the two; and when the side cutting mechanism 20 needs to be folded, only the connection and fixation between the first connecting seat 31 and the second connecting seat 32 needs to be released.

[0057] As shown in Figures 11 to 14 The first connecting seat 31 and the second connecting seat 32 are connected in a plug-in manner, and the first connecting seat 31 and the second connecting seat 32 are connected and fixed by electromagnetic attraction to realize the switching of the connection state.

[0058] In this way, only by using the corresponding electromagnetic attraction structure, the connection and fixation and the release of the first connecting seat 31 and the second connecting seat 32 can be realized, thereby greatly improving the convenience of switching the connection state between the first connecting seat 31 and the second connecting seat 32.

[0059] As shown in Figures 11 to 14As shown, the first connecting seat 31 is provided with an insertion slot 311, the slot opening of the insertion slot 311 is smaller than the inner radial dimension of the insertion slot 311, and the insertion slot 311 is provided with an electromagnet 33; the second connecting seat 32 is provided with a guide slot 321 penetrating through the second connecting seat 32, the side wall of the guide slot 321 is provided with a positioning hole 322 penetrating through the second connecting seat 32, and the guide slot 321 is provided with a spring 34; the spring 34 is sleeved with a connecting rod 35 which can move towards and away from the first connecting seat 31, and the spring 34 is used to apply a pushing force to the connecting rod 35 to push the connecting rod 35 away from the first connecting seat 31; the connecting rod 35 is made of a material which can be magnetically attracted, the connecting rod 35 is concave on the peripheral wall to form a guide groove 351, and the guide groove 351 is placed with a ball 36; when the connecting rod 35 does not move out of the guide slot 321, the guide groove 351 is used to push the ball 36 to partially protrude out of the positioning hole 322; when the connecting rod 35 moves out of the guide slot 321, the guide groove 351 is used to hide the ball 36 in the guide slot 321.

[0060] After adopting this arrangement, if the first connecting seat 31 and the second connecting seat 32 are not connected and fixed, the pushing force applied by the spring 34 to the connecting rod 35 will keep the connecting rod 35 in the guide slot 321, as shown in Figure 12 At this time, since the slope structure on the left side of the guide groove 351 will apply an outward pushing force to the ball 36, the ball 36 will be in a state of partially protruding out of the positioning hole 322, as shown in Figure 13 If the first connecting seat 31 and the second connecting seat 32 are connected and fixed, the slot opening of the insertion slot 311 will apply an inward pushing force to the ball 36, so that the ball 36 is hidden in the guide slot 321, and the connecting rod 35 is pushed to the left, as shown in Figure 14 After the part of the second connecting seat 32 for plug-in connection is completely inserted into the insertion slot 311, the spring 34 will push the connecting rod 35 to move to the right, and the ball 36 will return to the state of partially protruding out of the positioning hole 322, obviously, since the slot opening of the insertion slot 311 is small, the protrusion of the ball 36 will cause the second connecting seat 32 and the first connecting seat 31 to be unable to be separated, thereby realizing the connection and fixation between them.

[0061] When it is needed to release the connection and fixation between the first connecting seat 31 and the second connecting seat 32, the electromagnet 33 is started, the electromagnet 33 will attract the connecting rod 35 to move to the left, so that the ball 36 is hidden in the guide slot 321 again, and the first connecting seat 31 and the second connecting seat 32 can be released from the connection and fixation.

[0062] As shown in Figure 1 , Figure 9 and Figure 10As shown, the side cutting mechanism 20 of this embodiment also includes a positioning steering engine 22 and a positioning rod 23, the positioning steering engine 22 is used to drive the positioning rod 23 to move in and out of the tooth clamping position of the side cutting knife 21.

[0063] After using this setting mode, if it is needed to use the side cutting knife 21 to perform the mowing operation, the positioning rod 23 can be controlled by the positioning steering engine 22 to move away from the tooth clamping position of the side cutting knife 21 to release the movement restriction of the side cutting knife 21; if it is needed to prevent the side cutting knife 21 from moving, the positioning rod 23 can be controlled by the positioning steering engine 22 to move into the tooth clamping position of the side cutting knife 21, so that the side cutting knife 21 is prevented from moving.

[0064] As shown, Figure 8 The middle cutting mechanism 10 of this embodiment is provided with a track 13, and the track 13 is connected with the mowing position of the middle cutting mechanism 10 and the mowing position of the side cutting mechanism 20, so that the grass clippings can enter the middle part along a certain path.

[0065] In summary, the present application has at least the following beneficial effects:

[0066] 1. When the harvester needs to pass through a relatively narrow area, the side cutting mechanism 20 can be folded to pass through smoothly, which is very convenient for placing the mower in the room or warehouse.

[0067] 2. When there is an obstacle on the left side or the right side during mowing, the side cutting mechanism 20 can be folded to avoid the obstacle, saving the travel of the wheels during mowing and saving time, which is very friendly in automatic mowers.

[0068] 3. The multiple working modes of the mower can well adapt to various terrains, and in a large football field, the fully expanded working mode can be adopted.

[0069] 4. The overall modular design of the mowing device can well cooperate with other devices, and there will be more application scenarios in future multifunctional robots.

[0070] 5. The mowing efficiency of the mower is further improved, and the contradiction between the large mowing area when mowing and the small mowing area when not mowing is solved.

[0071] 6. In the mowing device, the track 13 is arranged on the top cover, so that the grass clippings can enter the middle part along a certain path, and the folding and collecting of the grass clippings can be achieved.

[0072] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, can also make a number of improvements and refinements, these improvements and refinements are also considered to be within the scope of the present application.

Claims

1. A foldable multi-mode grass cutting device, characterized in that, a middle cutting mechanism, side cutting mechanisms rotatably connected to opposite sides of the middle cutting mechanism, and a locking mechanism are included; the middle cutting mechanism includes a middle cutting knife capable of moving back and forth laterally, and a power module for driving the middle cutting knife to move back and forth laterally; the middle cutting knife includes oppositely arranged middle fixed blades and a middle movable blade, the middle fixed blades are fixedly installed on the middle cutting mechanism, and the middle movable blade is arranged on the middle fixed blades in a manner capable of moving back and forth laterally; the power module is used to drive the middle movable blade to move back and forth laterally; the power module includes a power motor, a driving bevel gear, a driven bevel gear, a swing rod, and a fixed seat; the power motor is used to drive the driving bevel gear to rotate; the driving bevel gear is in meshing transmission with the driven bevel gear; the driven bevel gear is provided with a transmission shaft extending along the axial direction thereof, the transmission shaft is provided with an annular groove arranged around the wall thereof, and the annular groove is arranged obliquely relative to the axial direction of the transmission shaft; the swing rod is provided with a collar, and the collar is sleeved in the annular groove; the other end of the swing rod is movably connected to the fixed seat; the fixed seat is connected and fixed with the middle movable blade; both of the side cutting mechanisms are structures capable of being folded to the middle cutting mechanism, and both of the side cutting mechanisms include side cutting knives capable of moving back and forth laterally; the side cutting knife includes oppositely arranged side fixed blades and a side movable blade, the side fixed blades are fixedly installed on the side cutting mechanism, and the side movable blade is arranged on the side fixed blades in a manner capable of moving back and forth laterally; a part of the locking mechanism is arranged on the middle cutting knife, and the other part of the locking mechanism is arranged on the side cutting knife, and the locking mechanism is used to fix and release the connection between the middle cutting knife and the side cutting knife; a part of the locking mechanism is arranged on the middle movable blade, and the other part of the locking mechanism is arranged on the side movable blade, and the locking mechanism is used to fix and release the connection between the middle movable blade and the side movable blade. 2.The grass cutting device according to claim 1, characterized in that, the shell of the middle cutting mechanism is rotatably connected with the shell of the side cutting mechanism, and a folding transmission mechanism is arranged at the connection between the two, and the folding transmission mechanism is used to drive the side cutting mechanism to be folded to the middle cutting mechanism. 3.The grass cutting device according to claim 2, characterized in that, the folding transmission mechanism includes a folding motor, a driving folding gear, and a driven folding gear, the folding motor is used to drive the driving folding gear to rotate, and the driving folding gear is in meshing transmission with the driven folding gear; one of the middle cutting mechanism and the side cutting mechanism is provided with the folding motor, and the other of the middle cutting mechanism and the side cutting mechanism is provided with the driven folding gear.

4. The grass cutting device according to claim 1, characterized in that, the locking mechanism comprises a first connecting seat and a second connecting seat, one of the middle cutting knife and the side cutting knife is provided with the first connecting seat, and the other of the middle cutting knife and the side cutting knife is provided with the second connecting seat, and the first connecting seat and the second connecting seat are in a releasable connection fixed structure.

5. The grass cutting device according to claim 4, characterized in that, the first connecting seat and the second connecting seat are in a plug-in connection, and the first connecting seat and the second connecting seat are in a structure for switching the connection fixed state by electromagnetic attraction.

6. The grass cutting device according to claim 5, characterized in that, the first connecting seat is provided with an insertion slot, the slot opening of the insertion slot is smaller than the internal radial size of the insertion slot, and the insertion slot is provided with an electromagnet; the second connecting seat is provided with a guide slot penetrating through the second connecting seat, the side wall of the guide slot is provided with a positioning hole penetrating through the second connecting seat, and the guide slot is provided with a spring; the spring is sleeved with a connecting rod which can move towards and away from the first connecting seat, the spring is used to apply a pushing force to the connecting rod to push it away from the first connecting seat; the connecting rod is made of a material which can be magnetically attracted, the connecting rod is concave on the wall to form a guide groove, and the guide groove is placed with a ball; when the connecting rod is not moved out of the guide slot, the guide groove is used to push the ball partially out of the positioning hole; when the connecting rod is moved out of the guide slot, the guide groove is used to hide the ball in the guide slot.

7. The grass cutting device according to claim 1, characterized in that, the side cutting mechanism further comprises a positioning rudder and a positioning rod, and the positioning rudder is used to drive the positioning rod to move in and out of the tooth clamping position of the side cutting knife.

Images