Cutting knife height adjusting structure of mower

Abstract

The utility model discloses a cutting knife height adjusting structure of a mower, which comprises a base, a cutting knife assembly, a control system, a fixed seat, a lifting driving mechanism, a transmission assembly, a guide rail assembly and a cutting knife assembly connecting seat, a lifting through hole is arranged on the base, and the cutting knife assembly connecting seat penetrates through the lifting through hole. The cutting knife assembly connecting base is connected to the guide rail assembly in a sliding mode and matched with the transmission assembly, the lifting driving mechanism drives the cutting knife assembly connecting base to move up and down at the lifting through hole through the transmission assembly, the cutting knife assembly is arranged on the cutting knife assembly connecting base, and the lifting driving mechanism and the cutting knife assembly are electrically connected with the control system. Wherein the lifting driving mechanism is used for providing driving power, so that the power is transmitted to the cutting knife assembly connecting seat through the transmission assembly, then the cutting knife assembly connecting seat can move up and down at the lifting through hole along the guide rail assembly, and the cutting knife assembly can be driven by the cutting knife assembly connecting seat to achieve the function of lifting up and down; therefore, mowing requirements of different heights can be met.

Description

Technical Field

[0001] The utility model relates to a lawn mower, in particular to a cutting blade height adjusting structure of the lawn mower. Background Art

[0002] A lawn mower is a machine used to trim the height of a lawn. However, the current lawn mower has inconvenient cutting height adjustment. For different lawns or different cutting height requirements of the same lawn, it is generally necessary to disassemble and replace the cutting blade to meet the actual cutting height requirements, which is time-consuming and laborious during the disassembly and assembly process. Therefore, improvements are needed. Summary of the Invention

[0003] The utility model aims at the defects in the prior art, such as inconvenient cutting blade height adjustment of the lawn mower, time-consuming and laborious, etc., and provides a new cutting blade height adjusting structure of the lawn mower.

[0004] In order to solve the above technical problems, the utility model is realized through the following technical solutions:

[0005] The cutting blade height adjusting structure of the lawn mower includes a machine base, a cutting blade assembly, a control system, and further includes a fixed seat, a lifting drive mechanism, a transmission component, a guide rail component, and a cutting blade assembly connecting seat. The fixed seat and the guide rail component are connected to the machine base. The lifting drive mechanism and the transmission component are respectively arranged on the fixed seat. The machine base is provided with a lifting through hole. The cutting blade assembly connecting seat passes through the lifting through hole. The cutting blade assembly connecting seat is slidably connected to the guide rail component and cooperates with the transmission component. The lifting drive mechanism drives the cutting blade assembly connecting seat to move up and down at the lifting through hole through the transmission component. The cutting blade assembly is arranged on the cutting blade assembly connecting seat. The lifting drive mechanism and the cutting blade assembly are respectively electrically connected to the control system.

[0006] Among them, the machine base is the bearing foundation of the whole structure. The fixed seat is used to bear the lifting drive mechanism and the transmission component. The lifting drive mechanism is used to provide driving power, so as to conduct the power to the cutting blade assembly connecting seat through the transmission component, and then the cutting blade assembly connecting seat can move up and down along the guide rail component at the lifting through hole. Then, the cutting blade assembly can realize the function of lifting up and down under the drive of the cutting blade assembly connecting seat to meet the cutting height requirements of different heights.

[0007] Preferably, for the cutter height adjustment structure of the lawn mower described above, the transmission assembly includes a worm and a transmission gear. A hollow shaft limiting space is provided inside the worm. A central shaft is provided on the fixed seat, and the central shaft extends into the shaft limiting space of the worm. The transmission gear is engaged with the worm. The lifting drive mechanism is engaged with the transmission gear and drives the worm to rotate through the transmission gear. Engagement teeth are provided on the connecting seat of the cutter assembly, and the worm is engaged with the engagement teeth of the connecting seat of the cutter assembly and drives the connecting seat of the cutter assembly to move up and down.

[0008] The transmission gear is engaged with the lifting drive mechanism and can be driven by the lifting drive mechanism to rotate, thereby driving the worm to rotate. During the rotation of the worm, it can drive the engagement teeth to move up and down, and further drive the connecting seat of the cutter assembly to move up and down. The fixed seat positions the central shaft by extending the central shaft into the shaft limiting space of the worm, which can reduce the occupied space of the worm in the height direction and improve the utilization rate of the space.

[0009] Preferably, for the cutter height adjustment structure of the lawn mower described above, it further includes a gear spring. The transmission gear is sleeved on the worm. Male ratchet teeth are provided at the upper end of the transmission gear, a tooth seat is provided at the lower part of the worm, and female ratchet teeth are provided at the lower end of the tooth seat. The male ratchet teeth of the transmission gear are engaged with the female ratchet teeth of the tooth seat, and the gear spring is engaged with the transmission gear and provides an elastic force towards the tooth seat for the transmission gear.

[0010] Since the transmission gear is sleeved on the worm, is engaged with the tooth seat of the worm through male and female ratchet teeth, and is cooperatively pressed through the gear spring, after the worm drives the connecting seat of the cutter assembly to the top or bottom, if the lifting drive mechanism does not stop driving due to an accident, the transmission gear will not cause the worm to jam, but will continuously move up and down on the worm along the surfaces of the male and female ratchet teeth, thereby reducing its mechanical loss.

[0011] Preferably, for the cutter height adjustment structure of the lawn mower described above, the connecting seat of the cutter assembly includes a seat body, a slider, and a joint plate. The cutter assembly is connected to the seat body. One side of the slider is connected to the seat body, and the other side of the slider is slidably connected to the guide rail assembly. One side of the joint plate is connected to the seat body, the engagement teeth are provided on the other side of the joint plate and are engaged with the transmission assembly, and the transmission assembly drives the joint plate to move up and down through the engagement teeth and drives the seat body to move synchronously.

[0012] The seat body is used to carry various components, and the slider can cooperate with the guide rail assembly to make the up and down movement of the seat body smoother. The joint plate is used to set joint teeth to cooperate with the transmission assembly to receive the power conducted by the transmission assembly. Through the mutual cooperation among the seat body, the slider, and the joint plate, on the one hand, the up and down movement function of the connecting seat of the cutter assembly is realized, and on the other hand, the disassembly, assembly, maintenance of the connecting seat of the cutter assembly are made more convenient.

[0013] Preferably, for the cutter height adjustment structure of the lawn mower described above, a U-shaped groove is provided at the upper end of the seat body. A retaining block is provided on one side of the inner surface of the U-shaped groove, and an escape space is formed by the cooperation of the other side of the inner surface of the U-shaped groove and the retaining block. The upper end of the joint plate is provided with a joint convex block that cooperates with the U-shaped groove of the seat body. The joint convex block is semi-cylindrical, the diameter of the joint convex block is greater than the escape space, and the radius of the joint convex block is less than the escape space.

[0014] The mutual cooperation among the U-shaped groove, the retaining block, the joint convex block, and the escape space realizes the hanging design between the joint plate and the seat body. During normal use, the joint convex block of the joint plate can be blocked by the retaining block in the U-shaped groove and cannot exit the U-shaped groove, so that the joint plate can drive the seat body to move up and down normally during the up and down movement driven by the transmission assembly. When it is necessary to disassemble and assemble the joint plate, the cooperation between the joint convex block and the escape space can also make the joint plate quickly detach from or be placed into the U-shaped groove, which is more convenient during disassembly and assembly.

[0015] Preferably, for the cutter height adjustment structure of the lawn mower described above, it further includes a compression spring. One end of the compression spring cooperates with the seat body, and the other end of the compression spring cooperates with one side of the lower part of the joint plate. A spring return space is formed between the seat body and the joint plate. The joint teeth are arranged on the other side of the lower part of the joint plate and correspond to the position of the compression spring. The compression spring provides an elastic force for the joint teeth towards the transmission assembly.

[0016] The setting of the spring return space enables the joint plate to have a margin of movement away from the transmission assembly. The cooperation between the compression spring and the joint plate makes the joint teeth of the joint plate elastically engage with the transmission assembly. During the transmission process of the transmission assembly, if there is a possibility of jamming between the transmission assembly and the joint teeth due to an unexpected situation, the joint teeth can be pushed away from the transmission assembly to avoid jamming. During the continuous operation of the transmission assembly, through the spring return action of the compression spring, the joint teeth can re-engage with the transmission assembly, so that the joint teeth of the lawn mower can automatically prevent jamming and automatically return to position during operation, improving the stability during use.

[0017] Preferably, for the cutter height adjustment structure of the lawn mower described above, the joint 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 vertically arranged. The middle section plate is horizontally arranged and is respectively connected to the lower end of the upper section plate and the upper end of the lower section plate. The engaging teeth are arranged on the other surface of the lower part of the lower section plate, and the engaging convex block is arranged at the upper end of the upper section plate. A spring socket is arranged on one side of the lower part of the lower section plate, and the other end of the pressing spring is socketed with the spring socket. The joint plate further includes a reinforcing plate, which is horizontally arranged and connected to the upper end of the upper section plate.

[0018] Through the intermediate connection function of the middle section plate, the overall structural strength of the joint plate can be enhanced, and the service life of the joint plate can be extended. The pressing spring can be better fixed in its position through the socketing of the spring socket, improving the stability during use. The reinforcing plate can further enhance the structural strength at the engaging convex block and extend the service life.

[0019] Preferably, for the cutter height adjustment structure of the lawn mower described above, it further includes a telescopic protective cover. A protective space is formed inside the telescopic protective cover. The seat body and the lifting through hole are located inside the protective space. The upper end of the telescopic protective cover is connected to the machine base, and the lower end of the telescopic protective cover is connected to the lower part of the seat body.

[0020] The telescopic protective cover can protect the seat body and the lifting through hole, preventing various grass clippings and sundries from entering the interior of the seat body through the lifting through hole during the lawn mowing operation, and improving the cleanliness inside the lawn mower.

[0021] Preferably, for the cutter height adjustment structure of the lawn mower described above, barbs are provided at the bottom of the machine base at the lifting through hole. A groove is formed between the barbs and the bottom of the machine base. The upper end of the telescopic protective cover forms an upper clamping convex ring, and the telescopic protective cover is clamped in the groove through the upper clamping convex ring. A seat body clamping groove is provided on the outer circle of the lower part of the seat body. The lower end of the telescopic protective cover forms a lower clamping convex ring, and the telescopic protective cover is clamped with the seat body clamping groove through the lower clamping convex ring. The cutter assembly includes a cutter drive motor, a cutter, and a cutter isolation cover. The cutter drive motor is located inside the seat body and passes through the bottom of the seat body to be connected to the cutter. The cutter isolation cover is located between the seat body and the cutter. The cutter isolation cover includes a connected upper blocking part and side blocking parts. The upper blocking part presses the lower clamping convex ring of the telescopic protective cover against the seat body clamping groove, and arc-shaped ventilation holes are arrayed on the side blocking parts.

[0022] Through the above structural settings, the connection between the telescopic protective cover and the machine base and the lower part of the seat body can be made closer. The upper blocking part can play an isolation role. On the one hand, it isolates the cutter from the outside, and on the other hand, it can further isolate the lifting through-hole from the cutter, playing a good isolation role. The arc-shaped ventilation holes of the side blocking part play a role in ventilation and heat dissipation, enabling hot air, water vapor, etc. generated during the mowing process to escape through the arc-shaped ventilation holes, avoiding affecting the mowing effect due to the accumulation of hot air and water vapor. And such a structural setting can make the connection between the telescopic protective cover and the lower part of the seat body more stable.

[0023] As an option, the cutter height adjustment structure of the lawn mower described above further includes a lifting position inspection mechanism. The lifting position inspection mechanism is electrically connected to the control system and cooperates with the connecting seat of the cutter assembly to obtain the height of the connecting seat of the cutter assembly; a vertical rack is provided on the connecting seat of the cutter assembly. The lifting position inspection mechanism includes a potentiometer and a potentiometer gear. The potentiometer is arranged on the fixed seat. The potentiometer gear is rotatably connected to the potentiometer and meshes with the vertical rack.

[0024] The lifting position inspection mechanism can provide a supervision and inspection function for the height adjustment of the connecting seat of the cutter assembly. Through the mutual cooperation among the potentiometer, the potentiometer gear, and the vertical rack, the height adjustment of the connecting seat of the cutter assembly can be made more accurate. Description of the Drawings

[0025] Figure 1 Schematic structural diagram of the cutter assembly of the present invention when it is in the lower position;

[0026] Figure 2 Cross-sectional view of the cutter assembly of the present invention when it is in the lower position;

[0027] Figure 3 Exploded view of the cutter assembly of the present invention when it is in the lower position;

[0028] Figure 4 Cross-sectional view of the cutter assembly of the present invention when it is in the upper position;

[0029] Figure 5 Schematic structural diagram of the cutter assembly, fixed seat, lifting drive mechanism, guide rail assembly, and connecting seat of the cutter assembly in the present invention;

[0030] Figure 6 Exploded view of the cutter assembly, fixed seat, lifting drive mechanism, transmission component, guide rail assembly, and connecting seat of the cutter assembly in the present invention;

[0031] Figure 7 Exploded view of the fixed seat, lifting drive mechanism, and transmission component in the present invention;

[0032] Figure 8 Cross-sectional views of the fixed seat and the transmission assembly in the present utility model;

[0033] Figure 9 Partial cross-sectional views of the fixed seat, the lifting drive mechanism, and the transmission assembly in the present utility model;

[0034] Figure 10 Schematic structural view of the connecting seat of the cutter assembly in the present utility model;

[0035] Figure 11 Exploded view of the connecting seat of the cutter assembly in the present utility model;

[0036] Figure 12 Cross-sectional view of the connecting seat of the cutter assembly in the present utility model;

[0037] Figure 13 Cross-sectional views of the fixed seat, the transmission assembly, and the connecting seat of the cutter assembly in the present utility model;

[0038] Figure 14 Exploded view of the fixed seat, the lifting drive mechanism, the transmission assembly, and the connecting seat of the cutter assembly in the present utility model;

[0039] Figure 15 Schematic structural view of the fixed seat, the connecting seat of the cutter assembly, and the lifting position inspection mechanism in the present utility model;

[0040] Figure 16 Schematic connection structure view of the lifting drive mechanism, the cutter assembly, the lifting position inspection mechanism, and the control system in the present utility model. Specific embodiments

[0041] The following will further describe the present utility model in detail in conjunction with the attached Figure 1-16 drawings and specific embodiments, but they do not limit the present utility model:

[0042] The cutting tool height adjustment structure of a lawn mower, including a machine base 100, a cutting tool assembly 200, a control system 300, further includes a fixed seat 400, a lifting drive mechanism 500, a transmission component 600, a guide rail component 700, and a cutting tool assembly connecting seat 800. The fixed seat 400 and the guide rail component 700 are connected to the machine base 100. The lifting drive mechanism 500 and the transmission component 600 are respectively arranged on the fixed seat 400. A lifting through hole 110 is provided on the machine base 100. The cutting tool assembly connecting seat 800 passes through the lifting through hole 110. The cutting tool assembly connecting seat 800 is slidably connected to the guide rail component 700 and cooperates with the transmission component 600. The lifting drive mechanism 500 drives the cutting tool assembly connecting seat 800 to move up and down at the lifting through hole 110 through the transmission component 600. The cutting tool assembly 200 is arranged on the cutting tool assembly connecting seat 800. The lifting drive mechanism 500 and the cutting tool assembly 200 are respectively electrically connected to the control system 300.

[0043] When height adjustment is required, the lifting drive mechanism 500 starts to operate and conducts power to the transmission component 600. Then, the power is conducted to the cutting tool assembly connecting seat 800 through the transmission component 600, so that the cutting tool assembly connecting seat 800 moves up or down along the guide rail component 700 at the lifting through hole 110, thereby adjusting the cutting height of the cutting tool assembly 200 to facilitate adaptation to different lawns or different cutting requirements.

[0044] Preferably, the transmission component 600 includes a worm 610 and a transmission gear 620. A hollow shaft limiting space 611 is arranged inside the worm 610. A central shaft 410 is arranged on the fixed seat 400. 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. Engagement teeth 831 are arranged on the cutting tool assembly connecting seat 800. The worm 610 meshes with the engagement teeth 831 of the cutting tool assembly connecting seat 800 and drives the cutting tool assembly connecting seat 800 to move up and down.

[0045] Preferably, a gear spring 630 is further included. The transmission gear 620 is sleeved on the worm 610. A male ratchet tooth 621 is arranged at the upper end of the transmission gear 620. A tooth seat 612 is arranged at the lower part of the worm 610. A female ratchet tooth 613 is arranged at the lower end of the tooth seat 612. The male ratchet tooth 621 of the transmission gear 620 cooperates with the female ratchet tooth 613 of the tooth seat 612. The gear spring 630 cooperates with the transmission gear 620 and provides an elastic force towards the tooth seat 612 for the transmission gear 620.

[0046] 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 to rotate forward or backward, thereby driving the lifting drive gear to rotate. When the lifting drive gear rotates, it drives the transmission gear 620 meshing with it to rotate. Then, the transmission gear 620 drives the worm 610 to rotate through the male ratchet teeth 621 and the female ratchet teeth 613. As the worm 610 rotates forward or backward, the engaging tooth 831 is driven to move upward or downward, so that the cutter assembly connecting seat 800 moves up and down along the guide rail assembly 700.

[0047] When the cutter assembly connecting seat 800 moves up or down to the position in place, if the lifting drive mechanism 500 does not stop driving due to an accident, when the cutter assembly connecting seat 800 can no longer move up or down, the worm 610 cannot be rotated at this time. Then, the transmission gear 620 will fluctuate up and down along the tooth surface of the female ratchet teeth 613 while rotating, so that the power is disconnected at the joint between the transmission gear 620 and the worm 610, avoiding the situation that the lifting drive mechanism 500 is jammed due to the jamming of the transmission gear 620, and improving the safety during use.

[0048] Preferably, the cutter assembly connecting seat 800 includes a seat body 810, a slider 820, and a joint plate 830. The cutter assembly 200 is connected to the seat body 810. One side of the slider 820 is connected to the seat body 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 seat body 810. The engaging tooth 831 is arranged 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 engaging tooth 831 and drives the seat body 810 to move synchronously.

[0049] Preferably, a U-shaped groove 811 is provided at the upper end of the seat body 810. A retaining block 812 is provided on one side of the inner surface of the U-shaped groove 811. An escape space 813 is formed by the cooperation of the other side of the inner surface of the U-shaped groove 811 and the retaining block 812. An engaging convex block 832 matching the U-shaped groove 811 of the seat body 810 is provided at the upper end of the joint plate 830. The engaging convex block 832 is semi-cylindrical. The diameter of the engaging convex block 832 is larger than the escape space 813, and the radius of the engaging convex block 832 is smaller than the escape space 813.

[0050] When assembling the joint plate 830 onto the seat body 810, the joint plate 830 can be rotated to the horizontal position so that the joint bumps 832 on the joint plate 830 are aligned with the U-shaped groove 811 at the upper end of the seat body 810. At this time, the size of the joint bump 832 in the width direction is the radius size of the joint bump 832. Then, the joint bump 832 can smoothly enter the U-shaped groove 811 from the escape space 813 of the U-shaped groove 811 at this position. After entering, then rotate the joint plate 830 to make the joint plate 830 rotate to the vertical position. At this time, the size of the joint bump 832 in the width direction is the diameter size of the joint bump 832. Then, the joint bump 832 will be blocked by the anti-escape stop block 812 of the U-shaped groove 811 and cannot escape, thus completing the assembly of the joint plate 830. Similarly, when it is necessary to remove the joint plate 830 from the seat body 810, just operate in the reverse direction, and the joint bump 832 of the joint plate 830 can be conveniently and quickly taken out from the U-shaped groove 811 on the seat body 810, making the maintenance and replacement more rapid.

[0051] When the joint teeth 831 are driven by the worm 610 to move upward, the joint teeth 831 drive the entire joint plate 830 to move upward. During the upward movement of the joint plate 830, the entire seat body 810 is driven to move upward by the way that the anti-escape stop block 812 is pushed upward by the joint bumps 832 on the joint plate 830, so that the seat body 810 moves upward along the guide rail assembly 700 through the slider 820.

[0052] When the joint teeth 831 are driven by the worm 610 to move downward, the joint teeth 831 drive the entire joint plate 830 to move downward. During the downward movement of the joint plate 830, the entire seat body 810 is driven to move downward by the way that the U-shaped groove 811 is pressed downward by the joint bumps 832 on the joint plate 830, so that the seat body 810 moves downward along the guide rail assembly 700 through the slider 820.

[0053] Preferably, it further includes a compression spring 840. One end of the compression spring 840 is matched with the seat body 810, and the other end of the compression spring 840 is matched with one side of the lower part of the joint plate 830. A rebound space 850 of the compression spring 840 is formed between the seat body 810 and the joint plate 830. The joint teeth 831 are arranged on the other side of the lower part of the joint plate 830 and correspond to the position of the compression spring 840. The compression spring 840 provides an elastic force for the joint teeth 831 towards the transmission assembly 600.

[0054] When the worm 610 is in normal operation, the pressing spring 840 presses the engaging teeth 831 on the engaging plate 830 towards the worm 610 to ensure the normal cooperation between the engaging teeth 831 and the worm 610. When an unexpected situation causes a tendency of jamming between the engaging teeth 831 and the worm 610, the force generated during the rotation of the worm 610 will exceed the pressure provided by the pressing spring 840, thereby moving the engaging teeth 831 away from the worm 610, that is, towards the spring-back space 850, so that the engaging teeth 831 can disengage from the worm 610 and avoid the occurrence of jamming. After the engaging teeth 831 disengage from the worm 610, under the elastic force of the pressing spring 840, the engaging teeth 831 are pressed back to the position of the worm 610 again. If the engaging teeth 831 can cooperate normally with the worm 610 at this time, the engaging teeth 831 and the worm 610 will return to the normal operating state; if there is still a tendency of jamming or they cannot cooperate normally between the engaging teeth 831 and the worm 610 at this time, the engaging teeth 831 will be pushed towards the spring-back space 850 again. Through such repeated movements between the engaging teeth 831 and the worm 610, the situation of jamming between the engaging teeth 831 and the worm 610 can be avoided, improving the fault tolerance rate during operation.

[0055] Preferably, the engaging plate 830 includes an upper plate 833, a middle plate 834, and a lower plate 835. The upper plate 833 and the lower plate 835 are vertically arranged. The middle plate 834 is horizontally arranged and is respectively connected to the lower end of the upper plate 833 and the upper end of the lower plate 835. The engaging teeth 831 are arranged on the other surface of the lower part of the lower plate 835, and the engaging protrusions 832 are arranged at the upper end of the upper plate 833. A spring socket 836 is arranged on one side of the lower part of the lower plate 835, and the other end of the pressing spring 840 is socketed with the spring socket 836. The engaging plate 830 further includes a reinforcing plate 837, and the reinforcing plate 837 is horizontally arranged and connected to the upper end of the upper plate 833.

[0056] Preferably, it further includes a telescopic protective cover 860. A protective space 861 is formed inside the telescopic protective cover 860. The seat body 810 and the lifting through hole 110 are located inside the protective space 861. The upper end of the telescopic protective cover 860 is connected to the machine base 100, and the lower end of the telescopic protective cover 860 is connected to the lower part of the seat body 810.

[0057] Preferably, a barb 120 is provided at the bottom of the base 100 at the lifting through hole 110. 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 clamping convex ring 862. The telescopic protective cover 860 is clamped in the groove 130 through the upper clamping convex ring 862. A seat body clamping groove 814 is provided on the outer circumference of the lower part of the seat body 810. The lower end of the telescopic protective cover 860 forms a lower clamping convex ring 863. The telescopic protective cover 860 is clamped with the seat body clamping groove 814 through the lower clamping convex ring 863. The cutter assembly 200 includes a cutter driving motor 210, a cutter 220, and a cutter isolation cover 230. The cutter driving motor 210 is located in the seat body 810 and passes through the bottom of the seat body 810 to be connected to the cutter 220. The cutter isolation cover 230 is located between the seat body 810 and the cutter 220. The cutter isolation cover 230 includes an upper blocking portion 231 and a side blocking portion 232 that are connected to each other. The upper blocking portion 231 presses the lower clamping convex ring 863 of the telescopic protective cover 860 against the seat body clamping groove 814. An arc-shaped ventilation hole 233 is formed in an array on the side blocking portion 232.

[0058] Preferably, it further includes a lifting position inspection mechanism 900. The lifting position inspection mechanism 900 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.

[0059] During the lifting of the cutter assembly connecting seat 800, the vertical rack 870 on the seat body 810 will drive the potentiometer gear 920 to rotate synchronously, so as to provide corresponding data for the potentiometer 910 through the potentiometer gear 920. The potentiometer 910 is electrically connected to the control system 300 and can provide the 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.

[0060] In summary, the above are only the preferred embodiments of the present invention. All equivalent changes and modifications made within the scope of the patent application of the present invention shall fall within the scope covered by the present invention.

Claims

1. A mower blade height adjustment structure, comprising a base (100), a mower blade assembly (200), and a control system (300), characterized in that: The machine also comprises a fixed seat (400), a lifting drive mechanism (500), a transmission assembly (600), a guide rail assembly (700), and a cutting knife assembly connecting seat (800); the fixed seat (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 arranged on the fixed seat (400); a lifting through hole (110) is arranged on the machine base (100); the cutting knife assembly connecting seat (800) passes through the lifting through hole (110); 0), the cutting knife assembly connection 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 cutting knife assembly connection seat (800) to move up and down at the lifting through hole (110) through the transmission assembly (600), the cutting knife assembly (200) is arranged on the cutting knife assembly connection seat (800), and the lifting drive mechanism (500) and the cutting knife assembly (200) are respectively electrically connected to the control system (300).

2. The mower blade height adjustment structure according to claim 1, characterized in that: The transmission assembly (600) comprises a worm (610) and a transmission gear (620); a hollow shaft limiting space (611) is arranged inside the worm (610); a central shaft (410) is arranged on the fixed seat (400); 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); and the cutting knife assembly connecting seat (800) is provided with engaging teeth (831); the worm (610) meshes with the engaging teeth (831) of the cutting knife assembly connecting seat (800) and drives the cutting knife assembly connecting seat (800) to move up and down.

3. The mower blade height adjustment structure according to claim 2, characterized in that: 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 tooth seat (612), the lower end of the tooth 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 tooth seat (612) are matched, and the gear spring (630) is matched with the transmission gear (620) and provides the transmission gear (620) with an elastic force toward the tooth seat (612).

4. The mower blade height adjustment structure according to claim 2, characterized in that: The cutting knife assembly connecting seat (800) comprises a seat body (810), a slider (820), and a coupling plate (830); the cutting knife assembly (200) is connected to the seat body (810); one side of the slider (820) is connected to the seat body (810); the other side of the slider (820) is slidably connected to the guide rail assembly (700); one side of the coupling plate (830) is connected to the seat body (810); the coupling teeth (831) are arranged on the other side of the coupling plate (830) and mesh with the transmission assembly (600); the transmission assembly (600) drives the coupling plate (830) to move up and down through the coupling teeth (831) and drives the seat body (810) to move synchronously.

5. The mower blade height adjustment structure according to claim 4, characterized in that: The upper end of the seat body (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), and the upper end of the coupling plate (830) is provided with a coupling protrusion (832) that cooperates with the U-shaped groove (811) of the seat body (810), the coupling protrusion (832) is semi-cylindrical, the diameter of the coupling protrusion (832) is larger than the disengagement space (813), and the radius of the coupling protrusion (832) is smaller than the disengagement space (813).

6. The mower blade height adjustment structure according to claim 5, characterized in that: It also includes a compression spring (840), one end of which cooperates with the seat body (810), and the other end of which cooperates with one side of the lower part of the coupling plate (830), and a rebound space (850) for the compression spring (840) is formed between the seat body (810) and the coupling plate (830), and the coupling tooth (831) is arranged on the other side of the lower part of the coupling plate (830) and corresponds to the position of the compression spring (840), and the compression spring (840) provides an elastic force for the coupling tooth (831) toward the transmission assembly (600).

7. The mower blade height adjustment structure according to claim 6, characterized in that: The coupling plate (830) comprises an upper plate (833), a middle plate (834), and a lower plate (835); the upper plate (833) and the lower plate (835) are arranged vertically; the middle plate (834) is arranged horizontally and respectively connects the lower end of the upper plate (833) and the upper end of the lower plate (835); the coupling teeth (831) are arranged on the other side surface of the lower part of the lower plate (835); the coupling protrusion (832) is arranged on the upper end of the upper plate (833); a spring sleeve platform (836) is arranged on one side of the lower part of the lower plate (835); the other end of the compression spring (840) is sleeved with the spring sleeve platform (836); the coupling plate (830) further comprises a reinforcing plate (837); the reinforcing plate (837) is arranged horizontally and connected to the upper end of the upper plate (833).

8. The mower blade height adjustment structure according to claim 4, characterized in that: It also includes a telescopic protective cover (860), wherein a protective space (861) is formed in the telescopic protective cover (860), 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 machine base (100), and the lower end of the telescopic protective cover (860) is connected to the lower part of the base (810).

9. The mower blade height adjustment structure according to claim 8, characterized in that: The bottom of the machine 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 machine base (100); an upper clamping convex ring (862) is formed at the upper end of the telescopic protective cover (860), and the telescopic protective cover (860) is clamped in the groove (130) through the upper clamping convex ring (862); a seat body clamping groove (814) is provided on the lower outer ring of the seat body (810), and a lower clamping convex ring (863) is formed at the lower end of the telescopic protective cover (860), and the telescopic protective cover (860) is clamped with the seat body clamping groove (814) through the lower clamping convex ring (863); the cutting knife assembly (200) comprises a cutting knife driving motor (210), a cutting knife (220), and a cutting knife isolation cover (230), wherein the cutting knife driving motor (210) is located in the seat body (810) and passes through the bottom of the seat body (810) to be connected to the cutting knife (220), and the cutting knife isolation cover (230) is located between the seat body (810) and the cutting knife (220); the cutting knife isolation cover (230) comprises an upper stopper (231) and a side stopper (232) which are connected to each other, wherein the upper stopper (231) presses the lower engaging protruding ring (863) of the telescopic protective cover (860) against the seat body slot (814), and an array of arc-shaped ventilation holes (233) are formed on the side stopper (232).

10. The mower blade height adjustment structure according to claim 1, characterized in that: The invention also comprises a lifting position checking mechanism (900), wherein the lifting position checking mechanism (900) is electrically connected to the control system (300), and the lifting position checking mechanism (900) cooperates with the cutting knife assembly connecting seat (800) and is used to obtain the height of the cutting knife assembly connecting seat (800); a vertical rack (870) is arranged on the cutting knife assembly connecting seat (800), and the lifting position checking mechanism (900) comprises a potentiometer (910) and a potentiometer gear (920); the potentiometer (910) is arranged on the fixing seat (400), and the potentiometer gear (920) is rotatably connected to the potentiometer (910) and meshes with the vertical rack (870).

Images