Mower height adjusting system and mower

Abstract

The invention discloses a hay mower height adjusting system and a hay mower, and relates to the technical field of hay mowers, and the hay mower height adjusting system comprises a frame, a height adjusting assembly and a locking assembly. Wherein the height adjusting assembly is rotatably connected to the vehicle frame, and the height adjusting assembly is used for rotating relative to the vehicle frame so as to adjust the height of the cutter head; the locking assembly is mounted on the frame, and the locking assembly is used for limiting rotation of the height adjusting assembly in the first state so that the height adjusting system can be switched to the transfer gear, and releasing limitation on rotation of the height adjusting assembly in the second state so that the height adjusting system can be switched to the use gear. According to the hay mower height adjusting system, the problem that a traditional manual push-pull type height adjusting structure is obviously short in operation convenience, adjusting precision and transfer safety is solved.

Description

Technical Field

[0001] This application relates to the field of lawnmower technology, and in particular to a lawnmower height adjustment system and a lawnmower. Background Technology

[0002] In lawn maintenance, different grass species, seasons, and landscape requirements have strict differences in the stubble height. Therefore, lawnmowers must be able to frequently and accurately adjust the cutting height of the blades.

[0003] The vast majority of products on the market still use a manual push-pull structure: a slide rail or guide post is arranged between the frame and the cutter head, and the operator holds the handle to push and pull the cutter head up and down. After the height is aligned, it is locked using a fixed toothed plate, spring pin, or knob bolt. Although this solution is inexpensive, the traditional manual push-pull height adjustment structure has obvious shortcomings in terms of ease of operation, adjustment accuracy, and transportation safety, and can no longer meet the requirements of modern lawn maintenance for efficient, precise, and safe operation. Summary of the Invention

[0004] The purpose of this application is to provide a lawnmower height adjustment system and a lawnmower that solves the problems of the traditional manual push-pull height adjustment structure in terms of ease of operation, adjustment accuracy and transportation safety.

[0005] To achieve the above objectives, this application provides a lawnmower height adjustment system, comprising:

[0006] Frame;

[0007] The height adjustment component is rotatably connected to the frame and is used to rotate relative to the frame to adjust the height of the cutter head;

[0008] A locking assembly, mounted on the frame, restricts the rotation of the height adjustment assembly in the first state so that the height adjustment system can switch to the transport position, and releases the restriction on the rotation of the height adjustment assembly in the second state so that the height adjustment system can switch to the use position.

[0009] In some embodiments, the lawnmower height adjustment system further includes a signal switch, the height adjustment component includes a rotating shaft and a trigger, the trigger is connected to the rotating shaft, and the trigger is configured to trigger the signal switch after following the rotating shaft to the trigger position, causing the locking component to switch from a second state to a first state.

[0010] In some embodiments, the lawnmower height adjustment system further includes a controller, which is communicatively connected to a signal switch and configured to send a locking command to a locking component after the signal switch is triggered, so as to control the locking component to switch from a second state to a first state.

[0011] In some embodiments, the lawnmower height adjustment system further includes a height adjustment drive and an unlocking switch. One end of the height adjustment drive is connected to a rotating shaft, and the other end is connected to the frame, for driving the rotating shaft to rotate relative to the frame.

[0012] Both the unlocking switch and the height adjustment drive are connected to the controller. The controller is also configured to send an unlocking command to the locking component after the unlocking switch is triggered, so as to control the locking component to switch from the first state to the second state, and to send a height adjustment command to the height adjustment drive after the restriction on the rotation of the height adjustment component is lifted, so as to control the height adjustment drive to drive the height adjustment component to rotate relative to the frame.

[0013] In some embodiments, the lawnmower height adjustment system further includes a support arm, which is fixed to the frame and rotatably engages with one end of the height adjustment drive.

[0014] The height adjustment assembly also includes a connecting arm, which is connected to the rotating shaft and rotates in conjunction with the other end of the height adjustment drive.

[0015] In some embodiments, the height adjustment assembly further includes a locking element connected to the rotating shaft, and the lawnmower height adjustment system further includes a mounting plate and a locking bracket, with the locking bracket mounted on the mounting plate;

[0016] The locking assembly includes a locking drive and a connector. The locking drive is mounted on the mounting plate and connected to the connector, and is used to move the connector so that the connector can be inserted into or removed from the locking member and the locking bracket.

[0017] In some embodiments, the lawnmower height adjustment system further includes a clamp, which is mounted on a mounting plate. The clamp has a guide hole, and the locking bracket has a locking hole. The guide hole and the locking hole are coaxially arranged so that the connector is inserted into the locking hole under the guidance of the guide hole.

[0018] In some embodiments, the lawnmower height adjustment system also includes a safety switch linked to the locking assembly. The safety switch is connected in series in the control circuit of the lawnmower's power system and is configured to disconnect when the locking assembly is in the second state to cut off the power output of the power system and prevent the blades on the cutter head from rotating during height adjustment.

[0019] In some embodiments, the lawnmower height adjustment system further includes a display module, the display module comprising:

[0020] The cutter head height information display unit is used to display the current height value of the cutter head in real time;

[0021] The gear information display unit is used to show the current gear position of the lawnmower;

[0022] The transfer gear information display unit is used to show the current transfer gear of the lawnmower;

[0023] The elevation command receiving unit is used to receive and transmit the user's elevation command.

[0024] This application also provides a lawnmower including the lawnmower height adjustment system of any of the above claims.

[0025] Compared to the aforementioned background technology, the lawnmower height adjustment system provided in this application includes a frame, a height adjustment component, and a locking component. The height adjustment component is rotatably connected to the frame and is used to rotate relative to the frame to adjust the height of the cutter head. The locking component is mounted on the frame and is used to restrict the rotation of the height adjustment component in a first state, allowing the height adjustment system to switch to a transport mode, and to release the restriction on the rotation of the height adjustment component in a second state, allowing the height adjustment system to switch to a usage mode.

[0026] This lawnmower height adjustment system features a locking mechanism that forcibly locks the height adjustment component in its first state, allowing the system to switch to the transport mode. This completely prevents spontaneous displacement of the cutter head height due to road bumps, transport vibrations, or accidental contact, effectively preventing damage from collisions with the ground and ensuring safe transport. In its second state, the locking component releases the lock, allowing the system to switch to the operating mode. The height of the cutter head is then adjusted by rotating the height adjustment component relative to the frame. This linkage between the locking function and the machine's overall gear shifting achieves enhanced safety, convenience, and reliability through a simple mechanism. Furthermore, the rotation adjustment method is superior to traditional manual push-pull height adjustment methods in terms of labor-saving, precision, reliability, and compactness, meeting the high-efficiency and precise operational requirements of modern garden machinery. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the lawnmower in the embodiments of this application.

[0029] Figure 2 for Figure 1 A connection diagram of the height adjustment system for a lawnmower.

[0030] Figure 3 for Figure 2 Assembly diagram of the locking component.

[0031] Figure 4 This is a control block diagram of the lawnmower height adjustment system in an embodiment of this application.

[0032] in:

[0033] 1-Cutterhead;

[0034] 2-Frame;

[0035] 3-Height adjustment component;

[0036] 4. Adjust the height of the drive components;

[0037] 5-Locking assembly;

[0038] 6-Unlock switch;

[0039] 7-Signal switch;

[0040] 8-Controller;

[0041] 9-Display module;

[0042] 10 - Safety switch;

[0043] 21-Support arm;

[0044] 22-Locking bracket; 221-Locking hole;

[0045] 23-Clamping hoop; 231-Guide hole;

[0046] 24-Mounting plate;

[0047] 31-Shaft;

[0048] 32-Connecting arm;

[0049] 33-Locking element;

[0050] 34-Trigger element;

[0051] 51-Locking drive component;

[0052] 52-Connector. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] Please see Figure 1The lawnmower height adjustment system provided in this application embodiment is used to adjust the height of the blade 1. The lawnmower height adjustment system includes a frame 2, a height adjustment component 3, and a locking component 5.

[0056] The cutter head 1 can be mounted and suspended on the height adjustment assembly 3 via a linkage assembly, and its height changes as the height adjustment assembly 3 moves. The height adjustment assembly 3 is rotatably connected to the frame 2, and the height adjustment assembly 3 is used to rotate relative to the frame 2 along the lateral axis of the frame 2 to adjust the height of the cutter head 1.

[0057] The locking assembly 5 is mounted on the frame 2. The locking assembly 5 is used to restrict the rotation of the height adjustment assembly 3 when it is in the first state so that the height adjustment system can switch to the transport position. When it is in the second state, it releases the restriction on the rotation of the height adjustment assembly 3 so that the height adjustment system can switch to the use position.

[0058] It should be noted that the transfer mode and the operating mode are two modes specifically designed to indicate whether the lawnmower is in mowing mode: the operating mode allows for free adjustment and control of the blade height within a specified range during normal lawnmower use, while the transfer mode allows the lawnmower to only perform movement and other functions but not mowing or blade height adjustment. In the transfer mode, the blade height is higher than the maximum blade height in the operating mode. When it is time to start mowing, switch the lawnmower from the transfer mode to the operating mode, and then further control the height adjustment component 3 to adjust the blade height 1.

[0059] This design of the lawnmower's height adjustment system allows locking component 5 to forcibly lock height adjustment component 3 in its first state, enabling the system to switch to the transport mode. This completely prevents spontaneous displacement of the cutter head 1 due to road bumps, transport vibrations, or accidental contact, effectively preventing damage from collisions and ensuring safe transport. In its second state, locking component 5 releases the lock on height adjustment component 3, allowing the system to switch to the operating mode. The height of the cutter head 1 is then adjusted by rotating height adjustment component 3 relative to the frame 2. In this way, by linking the locking function with the machine's overall gear shifting, a simple mechanism enhances safety, convenience, and reliability.

[0060] Furthermore, the rotation adjustment method is superior to the traditional manual push-pull height adjustment method in terms of labor saving, precision, reliability, and compactness, meeting the requirements of modern garden machinery for efficient and precise operation.

[0061] In terms of ease of operation: The rotation adjustment method adopted in this application connects the cutter head 1 through a connecting rod, which can form a lever mechanism. Only a small torque needs to be applied to overcome the gravity of the cutter head 1. Moreover, the frictional resistance of the rotating pair (such as the hinge) is much smaller than that of the sliding pair (push-pull guide rail). The adjustment process is smooth without jamming or crawling.

[0062] In terms of adjustment precision: a small rotation angle can achieve fine adjustment of the height of the cutter head 1, making it easier to achieve millimeter-level precise control, meeting the strict requirements of professional lawn maintenance for stubble height. The rotation angle and the change in the height of the cutter head 1 are geometrically related. By reasonably designing the linkage parameters, an approximately linear height-rotation angle correspondence can be obtained.

[0063] In terms of reliability: The height adjustment component 3 can be adjusted by rotating the shaft. The shaft is fitted with the rotating shaft hole, which can form redundant constraints. Compared with the friction locking of the push-pull guide rail, the impact and vibration resistance is significantly improved, effectively avoiding the tool runaway phenomenon. At the same time, the wear rate of the rotating bearing or bushing is small, and the durability advantage is more obvious in harsh environments full of dust and grass clippings.

[0064] Please refer to the following: Figure 2 To facilitate the control of the switching state of the locking component 5, the lawnmower height adjustment system also includes a signal switch 7. The height adjustment component 3 includes a rotating shaft 31 and a trigger 34. The trigger 34 is connected to the rotating shaft 31. The trigger 34 is configured to trigger the signal switch 7 after following the rotating shaft 31 to the trigger position, so that the locking component 5 switches from the second state to the first state.

[0065] Please refer to the following: Figure 4 The lawnmower height adjustment system also includes a controller 8, which is communicatively connected to a signal switch 7. The controller 8 is configured to send a locking command to the locking component 5 after the signal switch 7 is triggered, so as to control the locking component 5 to switch from the second state to the first state.

[0066] The signal switch 7 can be a push-button signal switch, and the trigger 34 can be a trigger bracket. The push-button signal switch is fixedly installed in a position where it can be triggered when the trigger bracket is in the transfer position. The push-button signal switch has only two states: triggered and not triggered, and it can transmit the signal to the controller 8.

[0067] To facilitate the rotation of the height adjustment component 3, the lawnmower height adjustment system also includes a height adjustment drive component 4. One end of the height adjustment drive component 4 is connected to the rotating shaft 31, and the other end is connected to the frame 2, which is used to drive the rotating shaft 31 to rotate relative to the frame 2.

[0068] Of course, depending on actual needs, the height adjustment drive 4 can be a push rod motor. During normal use, by controlling the extension length of the push rod motor, the rotation angle of the height adjustment component 3 is changed, thereby changing the height of the cutter head 1. Fixed positions can be canceled, and the self-locking characteristic of the push rod motor can be used to achieve stepless adjustment and locking of the height of the cutter head 1.

[0069] The lawnmower height adjustment system also includes a support arm 21, which is fixed to the frame 2 and rotates with one end of the height adjustment drive 4; the height adjustment component 3 also includes a connecting arm 32, which is connected to the rotating shaft 31 and rotates with the other end of the height adjustment drive 4.

[0070] Specifically, a height adjustment component 3 is installed on the longitudinal beam of the frame 2, and a push rod motor is installed on the support arm 21. The fixed end of the push rod motor is hinged to the support arm 21, and the push rod motor can rotate around the mounting shaft hole after installation. The connecting arm 32 is hinged to the telescopic end of the push rod motor, and the connecting arm 32 rotates around the center of the rotating shaft 31 as the push rod motor extends and retracts.

[0071] The lawnmower height adjustment system also includes an unlocking switch 6. Both the unlocking switch 6 and the height adjustment drive 4 are communicatively connected to the controller 8. The controller 8 is also configured to send an unlocking command to the locking component 5 after the unlocking switch 6 is triggered, so as to control the locking component 5 to switch from the first state to the second state. After the restriction on the rotation of the height adjustment component 3 is lifted, the controller 8 sends a height adjustment command to the height adjustment drive 4, so as to control the height adjustment drive 4 to drive the height adjustment component 3 to rotate relative to the frame 2.

[0072] To facilitate locking, the height adjustment assembly 3 also includes a locking element 33, which is connected to the rotating shaft 31. When the rotating shaft 31 rotates, the locking element 33 and the trigger element 34 rotate simultaneously. The lawnmower height adjustment system also includes a locking bracket 22, which is fixed to the frame 2.

[0073] The connecting arm 32 rotates around the center of the rotating shaft 31 as the push rod motor extends and retracts. At this time, the locking part 33 and the trigger bracket 34 rotate simultaneously. When rotating to the transfer position, the locking hole 221 of the locking part 33 and the locking hole 221 of the locking bracket 22 are both on the same central axis, and the trigger bracket 34 and the signal switch 7 are in the trigger state.

[0074] In this way, one end of the push rod motor is mounted on the support arm 21 on the frame 2, and can rotate around the mounting shaft hole of the support arm 21. The telescopic end is connected and installed with the connecting arm 32 on the height adjustment component 3. After installation, the push rod motor and the connecting arm 32 can rotate freely around the connection point shaft. After receiving the unlocking command from the controller 8, the telescopic end of the push rod motor extends and retracts within its stroke range, driving the connecting arm 32 to rotate in the corresponding direction around the center of the shaft 31, thereby changing the height of the cutter head 1.

[0075] It should be noted that the locking bracket 22 has a U-shaped plate structure, with locking holes 221 on both folded sides. When locked, the locking support 33 is located in the middle of the two folded surfaces of the locking bracket 22, and the locking holes 221 of the locking support 33 and the locking holes 221 of the locking bracket 22 are on the same central axis.

[0076] Please refer to the following: Figure 3The locking assembly 5 includes a locking drive 51 and a connector 52. The locking drive 51 is connected to the connector 52 and is used to move the connector 52, causing it to insert into or retract from the locking holes 221 of the locking member 33 and the locking bracket 22. The locking holes 221 of the locking member 33 and the locking bracket 22 are used for mounting and supporting the connector 52 when it extends.

[0077] Furthermore, the lawnmower height adjustment system also includes a clamp 23, which is installed on the frame 2. The clamp 23 has a guide hole 231, and the locking bracket 22 has a locking hole 221. The guide hole 231 and the locking hole 221 are coaxially arranged so that the connector 52 is inserted into the locking hole 221 under the guidance of the guide hole 231.

[0078] As can be seen, the guide hole 231 and the locking hole 221 are pre-coaxially positioned, and the clamp 23 itself is fixed to the mounting structure of the frame 2, which is equivalent to creating a rigid slide for the connector 52, playing a role in guiding and centering the connector 52. In this way, even if the frame 2 is slightly deformed due to welding or assembly errors, the clamp 23 can still compensate for the deviation, ensuring that the connector 52 can be accurately inserted into the locking hole 221 every time, avoiding partial locking or false locking caused by jamming.

[0079] Of course, depending on actual needs, the number of clamps 23 can be set to at least two, such as setting two clamps 23, which are spaced apart on the moving path of the connector 52 to ensure that the connector 52 is accurately inserted into the locking hole 221.

[0080] Of course, depending on actual needs, the locking drive component 51 and the connector 52 can be integrally formed; the locking drive component 51 and the connector 52 can also be hinged by an R-pin. One end of the connector 52 is set as a flat square with a pin hole, and one end of the locking drive component 51 is set with a groove that mates with the flat square. The bottom and top of the groove are respectively set with pin holes that mate with the pin holes of the flat square end of the connector 52. The flat square end of the connector 52 is inserted into the groove end of the locking drive component 51 and the pin holes of the two are aligned. The cylindrical end of the R-pin is inserted into the pin hole. After assembly, the relative rotation of the connector is restricted by the surface contact between the groove and the flat square. For ease of installation, a mounting plate 24 is provided on the frame 2. The mounting plate 24 extends along the length of the shaft 31. The locking drive component 51, the locking bracket 22, and the clamp 23 are all fixed to the mounting plate 24.

[0081] It is understandable that by fixing the locking drive component 51, the locking bracket 22, and the clamp 23 all onto the same mounting plate 24, the positional relationship of the three parts is guaranteed by the one-time processing of the mounting plate 24, no longer relying on multiple welding or drilling of the frame 2. At the same time, during the pre-assembly stage, the locking drive component 51, the locking bracket 22, and the clamp 23 can be locked into modular sub-assemblies first, and during the final assembly, only the mounting plate 24 needs to be installed onto the frame 2.

[0082] Specifically, the locking drive component 51 is a push-pull electromagnet, and the connector 52 is a pin. The pin is coaxially connected to the push-pull electromagnet at its telescopic end. The pin can slide freely within the guide hole 231 of the clamp 23, so that the pin can be inserted into the locking hole 221 of the locking bracket 22 under the guidance of the guide hole 231. The telescopic end of the push-pull electromagnet is coaxially connected to the pin, and the other end is fixedly installed. The push-pull electromagnet can telescopically move when energized, thereby driving the pin to telescopically move synchronously along the axis.

[0083] In this way, when the trigger bracket 34 and the signal switch 7 are in the triggered state, the locking hole 221 of the locking member 33 and the locking hole 221 of the locking bracket 22 are both on the central axis of the pin. When the push-pull electromagnet receives the locking command from the controller 8, it drives the pin to insert into the locking hole 221 of the locking member 33 and the locking hole 221 of the locking bracket 22, thereby achieving the purpose of locking the height adjustment component 3.

[0084] It should be noted that the locking bracket 22 has a U-shaped plate structure, with locking holes 221 on both folded sides. When locked, the locking support 33 is located in the middle of the two folded surfaces of the locking bracket 22, and the locking hole 221 of the locking support 33 and the locking hole 221 of the locking bracket 22 are on the same central axis.

[0085] In this way: when locking, the pin first enters the first folding surface of the locking bracket 22 (the folding surface near the locking drive member 51), then enters the locking support member 33, and finally enters the second folding surface of the locking bracket 22 (the folding surface away from the locking drive member 51); when unlocking, the pin first exits the second folding surface of the locking bracket 22, then exits the locking support member 33, and finally exits the first folding surface of the locking bracket 22.

[0086] As can be seen from the above, the mechanical locking and unlocking of the height adjustment component can be electrically controlled through the coordinated action of signal switch 7, controller 8, latch, push-pull electromagnet, etc.

[0087] In addition, the lawnmower height adjustment system also includes a display module 9. To facilitate the real-time display of the current height value of the cutter head 1, the display module 9 includes a cutter head height information display unit, which is used to display the current height value of the cutter head 1 in real time.

[0088] In other embodiments, to facilitate real-time display of the current height value of the cutter head 1, the lawnmower height adjustment system also includes an angle detection device. The angle detection device is installed at the rotational connection between the rotating shaft 31 and the frame 2. The angle detection device is used to detect the real-time rotation angle of the rotating shaft 31 and generate an angle signal. The cutter head height information display unit is electrically connected to the angle detection device and is used to display the current height value of the cutter head 1 in real time according to the angle signal.

[0089] It can be seen that the controller 8 receives signals from electrical components such as the display module 9 and signal switch 7, and then processes the signals and sends them to electrical components such as the push rod motor, push-pull electromagnet and display module 9.

[0090] Display module 9 can display gear position information and cutter head height information, receive signals from controller 8, and input transfer gear unlocking commands, gear shifting commands, and height adjustment commands and send signals to controller 8.

[0091] For example, display module 9 also includes a gear position information display unit and a transfer gear position information display unit. The gear position information display unit is used to display the current gear position of the lawnmower; the transfer gear position information display unit is used to display the current transfer gear position of the lawnmower.

[0092] Furthermore, the display module 9 also includes a gear shifting command receiving unit and a height adjustment command receiving unit. The gear shifting command receiving unit receives and transmits the user's gear shifting command to switch the lawnmower from the transfer gear to the operating gear. The height adjustment command receiving unit receives and transmits the user's height adjustment command, such as manually inputting the desired height of the blade 1. Of course, the display module 9 can also further receive and transmit the user's unlocking and locking commands.

[0093] When the lawnmower is in the working position and the height of the cutter head 1 is being adjusted, the controller 8 receives the user's height adjustment command, and the push rod motor begins to extend or retract. At the same time, it rotates around the mounting shaft hole on the support arm 21 of the frame 2, thereby driving the connecting arm 32 to rotate around the center of the rotating shaft 31, which in turn drives the cutter head 1 to rise or fall, thus realizing stepless adjustment of the height of the cutter head 1.

[0094] The lock is triggered when the lawnmower is switched from the working mode to the transfer mode. The lock must be unlocked before switching from the transfer mode to the working mode.

[0095] When switching between transport gears, the unlocking switch 6 sends an unlocking command to the controller 8. The controller 8 then sends a signal to the push-pull electromagnet. After receiving the electrical signal, the push-pull electromagnet shortens, pulling the pin to slide out of the locking hole 221 of the locking bracket 22 and the locking member 33, thus unlocking. Then, the controller 8 sends a signal to the push rod motor, which extends and retracts, driving the cutter head 1 to lower to the maximum height of the operating gear, i.e., switching to the operating gear.

[0096] When using the gear shifting mechanism, the gear shifting command receiver on the display module 9 receives and transmits the user's gear shifting command to the controller 8. Then, the controller 8 sends a locking command to the push-pull electromagnet. After receiving the electrical signal, the push-pull electromagnet extends, thereby pulling the pin to slide through the locking hole 221 of the locking bracket 22 and the locking member 33 in sequence, thus achieving mechanical locking.

[0097] It is important to note that when the lawnmower is in the operating mode, only the movement of the push rod motor can adjust the height of the blade 1. When the lawnmower is in the transfer mode, the height of the blade 1 is locked and cannot be adjusted. At this time, neither the push rod motor nor the push-pull electromagnet moves. They can only move when the operating mode is switched. The signals for the push rod motor and the push-pull electromagnet are provided by the controller 8. The signal from the signal switch 7 goes directly to the controller 8, which then sends command signals to the push rod motor and the push-pull electromagnet through preset logic. The signal switch 7 can only be triggered when the trigger bracket 34 is rotated to the angle of the transfer mode.

[0098] In some embodiments, the lawnmower height adjustment system also includes a safety switch 10 linked to the locking assembly 5. The safety switch 10 is connected in series in the control circuit of the lawnmower's power system. The safety switch 10 is configured to open when the locking assembly 5 is in the second state to cut off the power output of the power system and prevent the blades on the cutter head 1 from rotating during height adjustment.

[0099] Considering that if the blade is still rotating during height adjustment, it is very easy to break if the cutter head suddenly falls or hits a hard object, so the power is cut off before adjustment. This can reduce such mechanical impact to zero and extend the life of the cutter head and transmission system. In this way, the blade on the cutter head 1 will immediately stop rotating after the height adjustment component 3 is unlocked. When the operator reaches under the machine to pull the handle or tighten the screw, even if the start button is accidentally pressed, the blade will not suddenly rotate, completely eliminating the risk of cuts. This can forcibly bind the height adjustment and the blade stopping with minimal cost (one switch + two wires), making safety an unavoidable default action, while reducing machine wear and after-sales risks.

[0100] The control flow of the lawnmower height adjustment system in this application is described in detail below:

[0101] Step 1: Read the display information of the 9 gears on the display module to determine whether the current adjustment system is in the transfer gear or the use gear;

[0102] Step 2: Display the read information on display module 9, showing either "Transfer Gear" or "Used Gear". Proceed with subsequent operations based on the gear display on display module 9 and the operator's subjective needs.

[0103] Step 3: If the display module 9 shows "Use Gear", directly input the required cutter head height; if the display module 9 shows "Transfer Gear", you need to press a button to switch to "Use Gear" and then input the required cutter head height.

[0104] Step 31: When switching gears, output a signal to controller 8;

[0105] Step 32: The controller 8 sends a signal to the push-pull electromagnet, which retracts, causing the pin to exit the locking hole 221 of the pin locking bracket 22 and the locking member 33 (the pin first exits the second folding surface of the locking bracket 22, then exits the locking member 33, and finally exits the first folding surface of the locking bracket 22).

[0106] Step 33: The controller 8 sends a signal to the push rod motor (after step 32 is completed), and the push rod motor begins to shorten, shortening to the corresponding length, driving the height adjustment component 3 to adjust the height of the cutter head 1 to the maximum height of the used gear;

[0107] Step 4: Determine whether the input height of the cutter head 1 is within the range of the gear adjustment. Only when the input height of the cutter head 1 is within the range of the gear adjustment will the display module 9 retain the input height of the cutter head 1 for display, and at the same time send the input height signal of the cutter head 1 to the controller 8.

[0108] Step 5: The controller 8 sends a signal to the push rod motor. The push rod motor extends or retracts to the corresponding length according to the input adjustment height information, driving the height adjustment component 3 to move, thereby making the cutter head 1 reach the input height.

[0109] Step 6: When switching from the operating gear to the transfer gear, the button operation on the display module 9 is switched to the "transfer gear". The push rod motor extends from the current operating gear according to the input requirements, driving the trigger 34 on the height adjustment component 3 to rotate.

[0110] Step 61: The trigger 34 rotates to the angle when it is in the transfer position, and at the same time the locking 33 rotates to the angle when it is in the transfer position, and the signal switch 7 is triggered.

[0111] Step 62: Signal switch 7 sends a signal to controller 8;

[0112] Step 63: The controller 8 sends a signal to the push-pull electromagnet and simultaneously sends a signal to the display module 9 to indicate that it is currently in the "transfer gear" position;

[0113] Step 64: The push-pull electromagnet extends according to the signal, causing the pin to extend. The pin extends into the locking hole 221 of the locking bracket 22 and the locking member 33 (the pin first enters the first folding surface of the locking bracket 22, then enters the locking member 33, and finally enters the second folding surface of the locking bracket 22), which restricts the rotational movement of the locking member 33 and locks the height at the transfer position so that it no longer changes.

[0114] The lawnmower height adjustment system with the above configuration can use electric power instead of the traditional manual height adjustment method, and can achieve stepless adjustment of the blade height by utilizing the self-locking characteristic of the electric push rod itself. Through electric control, it can also switch from the operating gear to the transfer gear in abnormal mowing conditions.

[0115] The lawnmower provided in this application includes the lawnmower height adjustment system described in the above specific embodiments; other parts of the lawnmower can be referred to in related technologies, and will not be elaborated here.

[0116] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0117] The above provides a detailed description of the lawnmower height adjustment system and lawnmower provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A lawnmower height adjustment system, characterized in that, include: Frame (2); The height adjustment component (3) is rotatably connected to the frame (2) and is used to rotate relative to the frame (2) to adjust the height of the cutter head (1); A locking component (5) is installed on the frame (2) to restrict the rotation of the height adjustment component (3) in a first state so that the height adjustment system can switch to the transport gear, and to release the restriction on the rotation of the height adjustment component (3) in a second state so that the height adjustment system can switch to the use gear.

2. The lawnmower height adjustment system as described in claim 1, characterized in that, The lawnmower height adjustment system also includes a signal switch (7). The height adjustment component (3) includes a rotating shaft (31) and a trigger (34). The trigger (34) is connected to the rotating shaft (31). The trigger (34) is configured to trigger the signal switch (7) after following the rotating shaft (31) to the trigger position, so that the locking component (5) switches from the second state to the first state.

3. The lawnmower height adjustment system as described in claim 2, characterized in that, The lawnmower height adjustment system also includes a controller (8), which is communicatively connected to the signal switch (7). The controller (8) is configured to send a locking command to the locking component (5) after the signal switch (7) is triggered, so as to control the locking component (5) to switch from the second state to the first state.

4. The lawnmower height adjustment system as described in claim 3, characterized in that, The lawnmower height adjustment system also includes a height adjustment drive (4) and an unlocking switch (6). One end of the height adjustment drive (4) is connected to the rotating shaft (31), and the other end is connected to the frame (2), which is used to drive the rotating shaft (31) to rotate relative to the frame (2). The unlocking switch (6) and the height adjustment drive (4) are both connected to the controller (8). The controller (8) is also configured to send an unlocking command to the locking component (5) after the unlocking switch (6) is triggered, so as to control the locking component (5) to switch from the first state to the second state, and send a height adjustment command to the height adjustment drive (4) after the restriction on the rotation of the height adjustment component (3) is lifted, so as to control the height adjustment drive (4) to drive the height adjustment component (3) to rotate relative to the frame (2).

5. The lawnmower height adjustment system as described in claim 4, characterized in that, The lawnmower height adjustment system also includes a support arm (21), which is fixed to the frame (2) and rotates in cooperation with one end of the height adjustment drive (4); The height adjustment component (3) also includes a connecting arm (32), which is connected to the rotating shaft (31) and rotates in cooperation with the other end of the height adjustment drive (4).

6. The lawnmower height adjustment system as described in claim 2, characterized in that, The height adjustment component (3) also includes a locking element (33), which is connected to the rotating shaft (31). The lawnmower height adjustment system also includes a mounting plate (24) and a locking bracket (22), which is mounted on the mounting plate (24). The locking assembly (5) includes a locking drive (51) and a connector (52). The locking drive (51) is mounted on the mounting plate (24) and connected to the connector (52). It is used to drive the connector (52) to move so that the connector (52) can be inserted into the locking member (33) and the locking bracket (22) or removed from the locking member (33) and the locking bracket (22).

7. The lawnmower height adjustment system as described in claim 6, characterized in that, The lawnmower height adjustment system also includes a clamp (23), which is installed on the mounting plate (24). The clamp (23) has a guide hole (231), and the locking bracket (22) has a locking hole (221). The guide hole (231) and the locking hole (221) are coaxially arranged so that the plug (52) is inserted into the locking hole (221) under the guidance of the guide hole (231).

8. The lawnmower height adjustment system as described in any one of claims 1-7, characterized in that, The lawnmower height adjustment system also includes a safety switch (10) linked to the locking assembly (5). The safety switch (10) is connected in series in the control circuit of the lawnmower power system. The safety switch (10) is configured to disconnect when the locking assembly (5) is in the second state to cut off the power output of the power system and prevent the blades on the cutter head (1) from rotating during height adjustment.

9. The lawnmower height adjustment system as described in any one of claims 1-7, characterized in that, The lawnmower height adjustment system also includes a display module (9), which includes: The cutter head height information display unit is used to display the current height value of the cutter head (1) in real time; The gear information display unit is used to show the current gear position of the lawnmower; The transfer gear information display unit is used to show the current transfer gear of the lawnmower; The elevation command receiving unit is used to receive and transmit the user's elevation command.

10. A lawnmower, characterized in that, Includes the lawnmower height adjustment system as described in any one of claims 1-9.

Images