Height adjustment structure of mower

Abstract

The application discloses a mower cutter height adjusting structure, which comprises a machine base, a cutter assembly, a control system, a fixing base, a lifting driving mechanism, a transmission assembly, a guide rail assembly and a cutter assembly connecting base. The machine base is provided with a lifting through hole. The lifting driving mechanism drives the cutter assembly connecting base to move up and down at the lifting through hole through the transmission assembly. The cutter assembly is arranged on the cutter assembly connecting base. The transmission assembly comprises a worm and a transmission gear. The lifting driving mechanism drives the worm to rotate through the transmission gear. The worm is engaged with the engaging teeth of the cutter assembly connecting base and drives the cutter assembly connecting base to move up and down. The cutter assembly connecting base comprises a base body, a sliding block and an engaging plate. The engaging plate is connected to the base body on one side. The engaging teeth are arranged on the other side of the engaging plate and engaged with the transmission assembly. The lifting driving mechanism is used for providing driving power so that the cutter assembly connecting base can move up and down to adapt to the requirements of mowing grass at different heights.

Description

TECHNICAL FIELD

[0001] The present application relates to a mower, in particular to a height adjustment structure of a mower. BACKGROUND

[0002] The mower is a machine for trimming the height of the lawn, but the height adjustment of the mower is inconvenient, and it is time-consuming and laborious to disassemble and replace the cutter to adapt to the actual mowing height requirement for different lawns or different mowing height requirements of the same lawn, so it needs to be improved. SUMMARY

[0003] The present application provides a new height adjustment structure of a mower to solve the problems of inconvenient height adjustment of the cutter of the mower and time-consuming and laborious disassembly and replacement of the cutter in the prior art.

[0004] In order to solve the above technical problems, the present application realizes the following technical scheme:

[0005] The height adjustment structure of the cutter of the mower comprises a base, a cutter assembly, a control system, a fixed seat, a lifting driving mechanism, a transmission assembly, a guide rail assembly and a cutter assembly connecting seat, the fixed seat and the guide rail assembly are connected to the base, the lifting driving mechanism and the transmission assembly are respectively arranged on the fixed seat, the base is provided with a lifting through hole, the cutter assembly connecting seat passes through the lifting through hole, the cutter assembly connecting seat is slidingly connected to the guide rail assembly and cooperates with the transmission assembly, the lifting driving mechanism drives the cutter assembly connecting seat to move up and down at the lifting through hole through the transmission assembly, the cutter assembly is arranged on the cutter assembly connecting seat, and the lifting driving mechanism and the cutter assembly are respectively electrically connected to the control system; the transmission assembly comprises a worm and a transmission gear, the worm is internally provided with a hollow shaft limiting space, the fixed seat is provided with a central shaft, the central shaft extends into the shaft limiting space of the worm, the transmission gear cooperates with the worm, the lifting driving mechanism is engaged with the transmission gear and drives the worm to rotate through the transmission gear, the cutter assembly connecting seat is provided with an engaging tooth, the worm is engaged with the engaging tooth of the cutter assembly connecting seat and drives the cutter assembly connecting seat to move up and down; the cutter assembly connecting seat comprises a seat body, a sliding block and an engaging plate, the cutter assembly is connected to the seat body, one side of the sliding block is connected to the seat body, the other side of the sliding block is slidingly connected to the guide rail assembly, one side of the engaging plate is connected to the seat body, the engaging tooth is arranged on the other side of the engaging plate and engaged with the transmission assembly, and the transmission assembly drives the engaging plate to move up and down through the engaging tooth and drives the seat body to move synchronously.

[0006] The base is the load-bearing basis of the whole structure, the fixed seat is used for bearing the lifting driving mechanism and the transmission assembly, the lifting driving mechanism is used for providing driving power, so that the power is transmitted to the cutter assembly connecting seat through the transmission assembly, and then the cutter assembly connecting seat can move up and down at the lifting through hole along the guide rail assembly. The cutter assembly can be lifted up and down under the driving of the cutter assembly connecting seat to adapt to the mowing demand of different heights.

[0007] The transmission gear is engaged with the lifting driving mechanism and can be driven to rotate by the lifting driving mechanism, so as to drive the worm to rotate, and the worm can drive the engaging tooth to move up and down during the rotation, and then drive the cutter assembly connecting seat to move up and down. The fixed seat positions the central shaft by extending into the shaft limiting space of the worm, which can reduce the space occupied by the worm in the height direction and improve the space utilization.

[0008] The seat body is used for bearing various components, and the sliding block can cooperate with the guide rail assembly to make the up-down movement of the seat body more smooth. The engaging plate is used for arranging the engaging tooth to cooperate with the transmission assembly to receive the power transmitted by the transmission assembly. Through the cooperation among the seat body, the sliding block and the engaging plate, on the one hand, the up-down movement function of the cutter assembly connecting seat is realized, and on the other hand, the disassembly and maintenance of the cutter assembly connecting seat are more convenient.

[0009] As a preferred, the height adjusting structure of the mower further comprises a gear spring, the transmission gear is sleeved on the worm, the upper end of the transmission gear is provided with a male ratchet, the lower part of the worm is provided with a tooth seat, the lower end of the tooth seat is provided with a female ratchet, the male ratchet of the transmission gear cooperates with the female ratchet of the tooth seat, and the gear spring cooperates with the transmission gear and provides elastic force to the transmission gear towards the tooth seat.

[0010] Since the transmission gear is sleeved on the worm, cooperates with the tooth seat of the worm through the male ratchet and the female ratchet, and is compressed through the gear spring, if the lifting driving mechanism does not stop driving due to unexpected circumstances after the worm drives the cutter assembly connecting seat to the top or the bottom, the transmission gear will not cause the worm to be stuck, but will continuously jump up and down on the worm along the surface of the male ratchet and the female ratchet, thereby reducing the mechanical loss.

[0011] As a preferred, the height adjusting structure of the mower, the upper end of the seat body is provided with a U-shaped groove, one side of the inner side surface of the U-shaped groove is provided with a stop block, the other side of the inner side surface of the U-shaped groove cooperates with the stop block to form an escape space, the upper end of the engaging plate is provided with an engaging protrusion matched with the U-shaped groove of the seat body, the engaging protrusion is in a semi-cylindrical shape, the diameter of the engaging protrusion is greater than the escape space, and the radius of the engaging protrusion is less than the escape space.

[0012] The U-shaped groove, anti-detachment block, engaging protrusion, and disengagement space work together to achieve a hook-and-loop design between the connecting plate and the base. During normal use, the engaging protrusion of the connecting plate is blocked by the anti-detachment block in the U-shaped groove, preventing it from exiting the groove. This allows the connecting plate to move up and down normally, driving the base to move up and down as the transmission component drives it. When it is necessary to disassemble or assemble the connecting plate, the engagement protrusion and disengagement space work together to allow the connecting plate to quickly detach from or re-enter the U-shaped groove, making disassembly and assembly more convenient.

[0013] Preferably, the above-described lawnmower blade height adjustment structure further includes a compression spring. One end of the compression spring engages with the base, and the other end engages with one side of the lower part of the connecting plate. A rebound space for the compression spring is formed between the base and the connecting plate. The engaging tooth is located on the other side of the lower part of the connecting plate and corresponds to the position of the compression spring. The compression spring provides an elastic force to the engaging tooth toward the transmission assembly.

[0014] The springback space allows the connecting plate to move away from the transmission component. The cooperation between the compression spring and the connecting plate enables the connecting teeth of the connecting plate to elastically engage with the transmission component. During the transmission process, if an unexpected situation occurs that could cause jamming between the transmission component and the connecting teeth, the connecting teeth can be pushed away from the transmission component to avoid jamming. As the transmission component continues to operate, the connecting teeth can re-engage with the transmission component through the springback action of the compression spring. This allows the connecting teeth to automatically prevent jamming and automatically return to their original position during the operation of the lawnmower, improving the stability during use.

[0015] Preferably, in the above-described lawnmower blade height adjustment structure, the connecting plate includes an upper section plate, a middle section plate, and a lower section plate. The upper section plate and the lower section plate are arranged vertically, the middle section plate is arranged horizontally and connects the lower end of the upper section plate and the upper end of the lower section plate respectively, the connecting teeth are arranged on the lower side surface of the lower section plate, and the connecting protrusion is arranged on the upper end of the upper section plate.

[0016] The intermediate connecting plate enhances the overall structural strength of the joint plate and extends its service life.

[0017] Preferably, in the above-described lawnmower blade height adjustment structure, a spring sleeve platform is provided on one side of the lower section plate, and the other end of the compression spring is sleeved with the spring sleeve platform.

[0018] The compression spring can be better fixed in position by the spring socket, which improves its stability during use.

[0019] Preferably, in the above-described lawnmower blade height adjustment structure, the connecting plate further includes a reinforcing plate, which is arranged laterally and connected to the upper end of the upper section plate.

[0020] The reinforcing plate can further strengthen the structural strength of the joint protrusion and extend its service life.

[0021] Preferably, the above-mentioned lawnmower blade height adjustment structure also includes a telescopic protective cover, in which a protective space is formed, the base and the lifting through hole are located within the protective space, the upper end of the telescopic protective cover is connected to the base, and the lower end of the telescopic protective cover is connected to the lower part of the base.

[0022] The telescopic protective cover can protect the base and lifting hole, preventing various grass clippings and debris from entering the base through the lifting hole during mowing operations, thus improving the cleanliness of the lawnmower's interior.

[0023] Preferably, in the above-described lawnmower blade height adjustment structure, the bottom of the base has a barb at the lifting through hole, forming a groove between the barb and the bottom of the base; the upper end of the telescopic protective cover has an upper locking protrusion, and the telescopic protective cover is engaged with the groove via the upper locking protrusion; the lower outer ring of the base body has a base body slot, and the lower end of the telescopic protective cover has a lower locking protrusion, and the telescopic protective cover is engaged with the base body slot via the lower locking protrusion; the blade assembly The device includes a cutter drive motor, a cutter, and a cutter isolation cover. The cutter drive motor is located inside the base and extends through the bottom of the base and is connected to the cutter. The cutter isolation cover is located between the base and the cutter, and the cutter isolation cover presses the lower locking protrusion of the telescopic protective cover against the slot in the base. The cutter isolation cover includes an upper baffle and a side baffle that are connected to each other. The upper baffle presses the lower locking protrusion of the telescopic protective cover against the slot in the base, and the side baffle has an array of arc-shaped ventilation holes.

[0024] The above structural design allows for a tighter and more stable connection between the telescopic protective cover, the base, and the lower part of the base.

[0025] The upper baffle acts as an isolation barrier, separating the cutter from the outside environment and further isolating the lifting and lowering manhole from the cutter, providing excellent isolation. Meanwhile, the curved ventilation holes on the side baffles facilitate ventilation and heat dissipation, allowing heat and moisture generated during mowing to escape through the holes, preventing the accumulation of heat and moisture that could affect mowing performance.

[0026] Preferably, the above-described lawnmower blade height adjustment structure further includes a lifting position checking mechanism. The lifting position checking mechanism is electrically connected to the control system and cooperates with the blade assembly connecting seat to obtain the height of the blade assembly connecting seat. A vertical rack is provided on the blade assembly connecting seat. The lifting position checking mechanism includes a potentiometer and a potentiometer gear. The potentiometer is disposed on the fixed base, and the potentiometer gear is rotatably connected to the potentiometer and meshes with the vertical rack.

[0027] The lifting position inspection mechanism can provide supervision and inspection functions for the height adjustment of the cutter assembly connector. Through the cooperation between the potentiometer, potentiometer gear, and vertical rack, the height adjustment of the cutter assembly connector can be made more accurate. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the cutter assembly of the present invention when it is positioned at the bottom.

[0029] Figure 2 This is a cross-sectional view of the cutting blade assembly of the present invention when it is positioned below.

[0030] Figure 3 This is an exploded view of the cutting blade assembly of the present invention when it is positioned below.

[0031] Figure 4 This is a cross-sectional view of the cutting blade assembly of the present invention when it is positioned at the top.

[0032] Figure 5 This is a schematic diagram of the structure of the cutter assembly, the fixed base, the lifting drive mechanism, the guide rail assembly, and the cutter assembly connecting base in this invention;

[0033] Figure 6 This is an exploded view of the cutter assembly, fixed base, lifting drive mechanism, transmission assembly, guide rail assembly, and cutter assembly connecting base in this invention;

[0034] Figure 7 This is an exploded view of the fixed base, lifting drive mechanism, and transmission assembly in this invention;

[0035] Figure 8 This is a cross-sectional view of the fixed base and transmission assembly in this invention;

[0036] Figure 9 This is a partial cross-sectional view of the fixed base, lifting drive mechanism, and transmission assembly in this invention;

[0037] Figure 10 This is a schematic diagram of the cutter assembly connector in this invention;

[0038] Figure 11 This is an exploded view of the cutter assembly connector in this invention;

[0039] Figure 12 This is a cross-sectional view of the cutter assembly connector in this invention;

[0040] Figure 13 This is a cross-sectional view of the fixed base, transmission assembly, and cutter assembly connecting base in this invention;

[0041] Figure 14 This is an exploded view of the fixed base, lifting drive mechanism, transmission assembly, and cutter assembly connecting base in this invention;

[0042] Figure 15 This is a schematic diagram of the structure of the fixed base, the cutter assembly connecting base, and the lifting position inspection mechanism in this invention;

[0043] Figure 16 This is a schematic diagram of the connection structure of the lifting drive mechanism, the cutting blade assembly, the lifting position checking mechanism, and the control system in this invention. Detailed Implementation

[0044] The following is in conjunction with the appendix Figures 1-16 The invention will be further described in detail with reference to specific embodiments, but these are not intended to limit the invention:

[0045] The lawnmower's blade height adjustment structure includes a base 100, a blade assembly 200, and a control system 300. It also includes a fixed base 400, a lifting drive mechanism 500, a transmission assembly 600, a guide rail assembly 700, and a blade assembly connecting seat 800. The fixed base 400 and the guide rail assembly 700 are connected to the base 100. The lifting drive mechanism 500 and the transmission assembly 600 are respectively disposed on the fixed base 400. The base 100 has a lifting through hole 110, through which the blade assembly connecting seat 800 passes. The cutter assembly connecting seat 800 is slidably connected to the guide rail assembly 700 and cooperates with the transmission assembly 600. The lifting drive mechanism 500 drives the cutter assembly connecting seat 800 to move up and down at the lifting through hole 110 through the transmission assembly 600. The cutter assembly 200 is disposed on the cutter assembly connecting seat 800. The lifting drive mechanism 500 and the cutter assembly 200 are electrically connected to the control system 300 respectively. The transmission assembly 600 includes a worm gear 610 and a transmission gear 620. The worm gear 610 has a hollow shaft limiting hole inside. In section 611, a central shaft 410 is provided on the fixed base 400, and the central shaft 410 extends into the shaft limiting space 611 of the worm gear 610. The transmission gear 620 cooperates with the worm gear 610. The lifting drive mechanism 500 meshes with the transmission gear 620 and drives the worm gear 610 to rotate through the transmission gear 620. The cutter assembly connecting seat 800 is provided with engaging teeth 831. The worm gear 610 meshes with the engaging teeth 831 of the cutter assembly connecting seat 800 and drives the cutter assembly connecting seat 800 to move up and down. 800 includes a base 810, a slider 820, and a connecting plate 830. The cutter assembly 200 is connected to the base 810. One side of the slider 820 is connected to the base 810, and the other side of the slider 820 is slidably connected to the guide rail assembly 700. One side of the connecting plate 830 is connected to the base 810. The engaging teeth 831 are disposed on the other side of the connecting plate 830 and mesh with the transmission assembly 600. The transmission assembly 600 drives the connecting plate 830 to move up and down through the engaging teeth 831, thereby causing the base 810 to move synchronously.

[0046] Preferably, a gear spring 630 is also included. The transmission gear 620 is sleeved on the worm 610. The upper end of the transmission gear 620 is provided with a male ratchet 621. The lower part of the worm 610 is provided with a gear seat 612. The lower end of the gear seat 612 is provided with a female ratchet 613. The male ratchet 621 of the transmission gear 620 cooperates with the female ratchet 613 of the gear seat 612. The gear spring 630 cooperates with the transmission gear 620 and provides the transmission gear 620 with an elastic force toward the gear seat 612.

[0047] When height adjustment is required, the lifting drive mechanism 500 starts to operate and transmits power to the transmission component 600. Then, the power is transmitted to the cutter assembly connecting seat 800 through the transmission component 600, so that the cutter assembly connecting seat 800 moves up or down along the guide rail assembly 700 at the lifting through hole 110, thereby adjusting the mowing height of the cutter assembly 200, which is convenient for adapting to different lawns or different mowing needs.

[0048] The lifting drive mechanism 500 includes a lifting drive motor and a lifting drive gear. The lifting drive motor receives a control signal from the control system 300 and rotates forward or backward, thereby driving the lifting drive gear to rotate. When the lifting drive gear rotates, it drives the transmission gear 620, which meshes with the lifting drive gear, to rotate. Then, the transmission gear 620 drives the worm gear 610 to rotate through the male ratchet 621 and the female ratchet 613. As the worm gear 610 rotates forward or backward, the engagement teeth 831 are driven to move up or down, thereby causing the cutter assembly connecting seat 800 to move up and down along the guide rail assembly 700.

[0049] When the cutter assembly connecting seat 800 moves up or down into position, if the lifting drive mechanism 500 fails to stop driving due to an unexpected situation, the worm gear 610 will also be unable to rotate when the cutter assembly connecting seat 800 can no longer move up or down. In this case, the transmission gear 620 will rotate while moving up and down along the tooth surface of the female ratchet 613, thereby disconnecting the power at the engagement point between the transmission gear 620 and the worm gear 610. This avoids the situation where the lifting drive mechanism 500 jams due to the transmission gear 620 jamming, thus improving the safety during use.

[0050] Preferably, the upper end of the seat 810 is provided with a U-shaped groove 811, one side of the inner surface of the U-shaped groove 811 is provided with a detachment stop block 812, and the other side of the inner surface of the U-shaped groove 811 cooperates with the detachment stop block 812 to form a disengagement space 813. The upper end of the connecting plate 830 is provided with a connecting protrusion 832 that cooperates with the U-shaped groove 811 of the seat 810. The connecting protrusion 832 is semi-cylindrical, the diameter of the connecting protrusion 832 is larger than the disengagement space 813, and the radius of the connecting protrusion 832 is smaller than the disengagement space 813.

[0051] When assembling the connecting plate 830 onto the base 810, the connecting plate 830 can be rotated to a horizontal position so that the engaging protrusion 832 on the connecting plate 830 aligns with the U-shaped groove 811 at the upper end of the base 810. At this time, the width of the engaging protrusion 832 is equal to its radius, allowing it to smoothly enter the U-shaped groove 811 from the disengagement space 813. After entering, the connecting plate 830 is rotated to a vertical position, where the width of the engaging protrusion 832 is equal to its diameter. In this position, the engaging protrusion 832 is blocked by the anti-disengagement block 812 of the U-shaped groove 811 and cannot disengage, thus completing the assembly of the connecting plate 830. Similarly, when it is necessary to remove the connecting plate 830 from the base 810, simply reverse the operation to easily and quickly remove the connecting protrusion 832 of the connecting plate 830 from the U-shaped groove 811 on the base 810, making maintenance and replacement faster.

[0052] When the engaging tooth 831 is driven upward by the worm gear 610, the engaging tooth 831 drives the engaging plate 830 to move upward as a whole. During the upward movement of the engaging plate 830, the engaging protrusion 832 on the engaging plate 830 pushes the anti-disengagement block 812 upward, thereby driving the entire seat 810 to move upward, so that the seat 810 moves upward along the guide rail assembly 700 via the slider 820.

[0053] When the engaging tooth 831 is driven downward by the worm gear 610, the engaging tooth 831 drives the engaging plate 830 to move downward as a whole. During the downward movement of the engaging plate 830, the engaging protrusion 832 on the engaging plate 830 presses the U-shaped groove 811 downward, thereby driving the entire seat 810 to move downward, so that the seat 810 moves downward along the guide rail assembly 700 via the slider 820.

[0054] Preferably, a compression spring 840 is also included, one end of which engages with the seat 810, and the other end of which engages with one side of the lower part of the connecting plate 830. A rebound space 850 for the compression spring 840 is formed between the seat 810 and the connecting plate 830. The engaging tooth 831 is disposed on the other side of the lower part of the connecting plate 830 and corresponds to the position of the compression spring 840. The compression spring 840 provides an elastic force to the engaging tooth 831 toward the transmission assembly 600.

[0055] During normal operation of the worm gear 610, the clamping spring 840 presses the engagement teeth 831 on the engagement plate 830 against the worm gear 610, ensuring proper engagement between the engagement teeth 831 and the worm gear 610. However, if an unexpected situation occurs that causes the engagement teeth 831 to jam with the worm gear 610, the force generated by the worm gear 610 during rotation will exceed the pressure provided by the clamping spring 840, thus moving the engagement teeth 831 away from the worm gear 610, i.e., towards the springback space 850. This allows the engagement teeth 831 to disengage from the worm gear 610, preventing jamming. After the engaging tooth 831 disengages from the worm 610, it is pressed back onto the worm 610 by the elastic force of the compression spring 840. If the engaging tooth 831 can properly engage with the worm 610 at this time, the engaging tooth 831 and the worm 610 will return to normal operation. However, if there is still a tendency for the engaging tooth 831 and the worm 610 to jam or they cannot properly engage, the engaging tooth 831 will be pushed again towards the springback space 850. Through this repeated movement between the engaging tooth 831 and the worm 610, jamming between the engaging tooth 831 and the worm 610 can be avoided, improving the fault tolerance during operation.

[0056] Preferably, the joining plate 830 includes an upper section plate 833, a middle section plate 834, and a lower section plate 835. The upper section plate 833 and the lower section plate 835 are arranged vertically, the middle section plate 834 is arranged horizontally and connects the lower end of the upper section plate 833 and the upper end of the lower section plate 835 respectively, the joining tooth 831 is disposed on the lower side surface of the lower section plate 835, and the joining protrusion 832 is disposed on the upper end of the upper section plate 833.

[0057] Preferably, a spring sleeve platform 836 is provided on one side of the lower section plate 835, and the other end of the compression spring 840 is sleeved with the spring sleeve platform 836.

[0058] Preferably, the joining plate 830 further includes a reinforcing plate 837, which is arranged laterally and connected to the upper end of the upper section plate 833.

[0059] Preferably, the system also includes a telescopic protective cover 860, which has a protective space 861. The base 810 and the lifting through hole 110 are located in the protective space 861. The upper end of the telescopic protective cover 860 is connected to the base 100, and the lower end of the telescopic protective cover 860 is connected to the lower part of the base 810.

[0060] Preferably, the bottom of the base 100 is provided with a barb 120 at the lifting through hole 110, and a groove 130 is formed between the barb 120 and the bottom of the base 100. The upper end of the telescopic protective cover 860 forms an upper snap-fit ​​protrusion 862, and the telescopic protective cover 860 is snapped into the groove 130 by the upper snap-fit ​​protrusion 862. The lower outer ring of the seat body 810 is provided with a seat body slot 814, and the lower end of the telescopic protective cover 860 forms a lower snap-fit ​​protrusion 863, and the telescopic protective cover 860 is snapped into the seat body slot 814 by the lower snap-fit ​​protrusion 863. The cutter assembly 200 includes a cutter drive motor 210 and a cutter 2. 20. A cutter isolation cover 230, wherein the cutter drive motor 210 is located inside the base 810 and extends through the bottom of the base 810 and is connected to the cutter 220, the cutter isolation cover 230 is located between the base 810 and the cutter 220, and the cutter isolation cover 230 presses the lower locking protrusion 863 of the telescopic protective cover 860 against the base groove 814; the cutter isolation cover 230 includes an upper baffle 231 and a side baffle 232 connected to each other, the upper baffle 231 presses the lower locking protrusion 863 of the telescopic protective cover 860 against the base groove 814, and the side baffle 232 has an array of arc-shaped ventilation holes 233.

[0061] Preferably, the system further includes a lifting position checking mechanism 900, which is electrically connected to the control system 300. The lifting position checking mechanism 900 cooperates with the cutter assembly connecting seat 800 and is used to obtain the height of the cutter assembly connecting seat 800. A vertical rack 870 is provided on the cutter assembly connecting seat 800. The lifting position checking mechanism 900 includes a potentiometer 910 and a potentiometer gear 920. The potentiometer 910 is disposed on the fixed seat 400. The potentiometer gear 920 is rotatably connected to the potentiometer 910 and meshes with the vertical rack 870.

[0062] During the lifting and lowering of the cutter assembly connecting seat 800, the vertical rack 870 on the seat 810 drives the potentiometer gear 920 to rotate synchronously, thereby providing corresponding data to the potentiometer 910 through the potentiometer gear 920. The potentiometer 910 is electrically connected to the control system 300 and can provide corresponding data to the control system 300, thereby facilitating the control system 300 to perform more precise height adjustment control on the lifting drive mechanism 500.

[0063] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be included within the scope of the present invention.

Claims

1. A blade height adjustment structure for a lawnmower, comprising a base (100), a blade assembly (200), and a control system (300), characterized in that: It also includes a fixed base (400), a lifting drive mechanism (500), a transmission assembly (600), a guide rail assembly (700), and a cutter assembly connecting seat (800). The fixed base (400) and the guide rail assembly (700) are connected to the machine base (100). The lifting drive mechanism (500) and the transmission assembly (600) are respectively disposed on the fixed base (400). The machine base (100) is provided with a lifting through hole (110). The cutter assembly connecting seat (800) passes through the lifting through hole (110) and is slidably connected to the guide rail assembly (700) and connected to the guide rail assembly (700). The transmission assembly (600) cooperates with the lifting drive mechanism (500), which drives the cutter assembly connecting seat (800) to move up and down at the lifting through hole (110) through the transmission assembly (600). The cutter assembly (200) is set on the cutter assembly connecting seat (800). The lifting drive mechanism (500) and the cutter assembly (200) are electrically connected to the control system (300). The transmission assembly (600) includes a worm gear (610) and a transmission gear (620). The worm gear (610) has a hollow shaft limiting space (611) inside. The fixed seat (400) is provided with a central shaft ( 410), the central shaft (410) extends into the shaft limiting space (611) of the worm (610), the transmission gear (620) cooperates with the worm (610), the lifting drive mechanism (500) meshes with the transmission gear (620) and drives the worm (610) to rotate through the transmission gear (620), the cutter assembly connecting seat (800) is provided with engagement teeth (831), the worm (610) meshes with the engagement teeth (831) of the cutter assembly connecting seat (800) and drives the cutter assembly connecting seat (800) to move up and down; the cutter assembly connecting seat (800) includes a seat body (810) The cutter assembly (200) is connected to the base (810). One side of the slider (820) is connected to the base (810), and the other side of the slider (820) is slidably connected to the guide rail assembly (700). One side of the joint plate (830) is connected to the base (810), and the engagement tooth (831) is disposed on the other side of the joint plate (830) and meshes with the transmission assembly (600). The transmission assembly (600) drives the joint plate (830) to move up and down through the engagement tooth (831) and drives the base (810) to move synchronously. It also includes a gear spring (630), the transmission gear (620) is sleeved on the worm (610), the upper end of the transmission gear (620) is provided with a male ratchet (621), the lower part of the worm (610) is provided with a gear seat (612), the lower end of the gear seat (612) is provided with a female ratchet (613), the male ratchet (621) of the transmission gear (620) and the female ratchet (613) of the gear seat (612) cooperate, the gear spring (630) cooperates with the transmission gear (620) and provides the transmission gear (620) with an elastic force toward the gear seat (612); The upper end of the seat (810) is provided with a U-shaped groove (811). One side of the inner surface of the U-shaped groove (811) is provided with a stop block (812). The other side of the inner surface of the U-shaped groove (811) cooperates with the stop block (812) to form a disengagement space (813). The upper end of the connecting plate (830) is provided with a connecting protrusion (832) that cooperates with the U-shaped groove (811) of the seat (810). The connecting protrusion (832) is semi-cylindrical. The diameter of the connecting protrusion (832) is larger than that of the disengagement space (813), and the radius of the connecting protrusion (832) is smaller than that of the disengagement space (813).

2. The blade height adjustment structure of the lawnmower according to claim 1, characterized in that: It also includes a compression spring (840), one end of which engages with the seat (810), and the other end of which engages with one side of the lower part of the connecting plate (830). A rebound space (850) for the compression spring (840) is formed between the seat (810) and the connecting plate (830). The engaging tooth (831) is located on the other side of the lower part of the connecting plate (830) and corresponds to the position of the compression spring (840). The compression spring (840) provides the engaging tooth (831) with an elastic force toward the transmission assembly (600).

3. The blade height adjustment structure of the lawnmower according to claim 2, characterized in that: The joining plate (830) includes an upper section plate (833), a middle section plate (834), and a lower section plate (835). The upper section plate (833) and the lower section plate (835) are arranged vertically, and the middle section plate (834) is arranged horizontally and is respectively connected to the lower end of the upper section plate (833) and the upper end of the lower section plate (835). The joining teeth (831) are disposed on the other side surface of the lower part of the lower section plate (835), and the joining protrusions (832) are disposed on the upper end of the upper section plate (833).

4. The blade height adjustment structure of the lawnmower according to claim 3, characterized in that: A spring sleeve platform (836) is provided on one side of the lower section plate (835), and the other end of the compression spring (840) is sleeved with the spring sleeve platform (836).

5. The blade height adjustment structure of the lawnmower according to claim 3, characterized in that: The joining plate (830) also includes a reinforcing plate (837), which is arranged laterally and connected to the upper end of the upper section plate (833).

6. The blade height adjustment structure of the lawnmower according to claim 1, characterized in that: It also includes a telescopic protective cover (860), in which a protective space (861) is formed. The base (810) and the lifting through hole (110) are located in the protective space (861). The upper end of the telescopic protective cover (860) is connected to the base (100), and the lower end of the telescopic protective cover (860) is connected to the lower part of the base (810).

7. The blade height adjustment structure for a lawnmower according to claim 6, characterized in that: The bottom of the base (100) is provided with a barb (120) at the lifting through hole (110), and a groove (130) is formed between the barb (120) and the bottom of the base (100). The upper end of the telescopic protective cover (860) is formed with an upper snap-fit ​​protrusion (862), and the telescopic protective cover (860) is snapped into the groove (130) through the upper snap-fit ​​protrusion (862). The lower outer ring of the seat body (810) is provided with a seat body slot (814), and the lower end of the telescopic protective cover (860) is formed with a lower snap-fit ​​protrusion (863), and the telescopic protective cover (860) is snapped into the seat body slot (814) through the lower snap-fit ​​protrusion (863). The cutter assembly (200) includes a cutter drive motor (210) and a cutter (220). The cutter isolation cover (230) is located inside the base (810) and extends through the bottom of the base (810) to connect with the cutter (220). The cutter isolation cover (230) is located between the base (810) and the cutter (220), and the cutter isolation cover (230) presses the lower snap-fit ​​protrusion (863) of the telescopic protective cover (860) against the base groove (814). The cutter isolation cover (230) includes an upper baffle (231) and a side baffle (232) connected to each other. The upper baffle (231) presses the lower snap-fit ​​protrusion (863) of the telescopic protective cover (860) against the base groove (814). The side baffle (232) has an array of arc-shaped ventilation holes (233).

8. The blade height adjustment structure of the lawnmower according to claim 1, characterized in that: It also includes a lifting position inspection mechanism (900), which is electrically connected to the control system (300). The lifting position inspection mechanism (900) cooperates with the cutter assembly connecting seat (800) and is used to obtain the height of the cutter assembly connecting seat (800). A vertical rack (870) is provided on the cutter assembly connecting seat (800). The lifting position inspection mechanism (900) includes a potentiometer (910) and a potentiometer gear (920). The potentiometer (910) is provided on the fixed seat (400). The potentiometer gear (920) is rotatably connected to the potentiometer (910) and meshes with the vertical rack (870).

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