Cutting knife height adjusting structure of mower

Abstract

The invention discloses a mowing machine cutting knife height adjusting structure which comprises a machine base, a cutting knife assembly, a control system, a fixing base, a lifting driving mechanism, a transmission assembly, a guide rail assembly and a cutting knife assembly connecting base, a lifting through hole is formed in the machine base, and the lifting driving mechanism drives the cutting knife assembly connecting base to move up and down in the lifting through hole through the transmission assembly. The cutting knife assembly is arranged on the cutting knife assembly connecting seat; the transmission assembly comprises a worm and a transmission gear, the lifting driving mechanism drives the worm to rotate through the transmission gear, and the worm is meshed with the joint teeth of the cutting knife assembly connecting seat and drives the cutting knife assembly connecting seat to move up and down; the cutting knife assembly connecting base comprises a base body, a sliding block and a joint plate, one side of the joint plate is connected to the base body, and the joint teeth are arranged on the other side of the joint plate and meshed with the transmission assembly. The lifting driving mechanism is used for providing driving power to enable the cutter assembly connecting base to move up and down so as to meet the mowing requirements of different heights.

Description

Technical Field

[0001] The invention relates to a lawn mower, in particular to a cutting blade height adjustment 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 mowers are difficult to adjust the mowing height. For different lawns or different mowing height requirements for the same lawn, the cutter generally needs to be disassembled and replaced to meet the actual mowing height requirements. The disassembly and assembly process is time-consuming and laborious, so improvements are needed. Summary of the invention

[0003] The present invention aims at the defects in the prior art that the cutting blade height adjustment of the lawn mower is inconvenient, time-consuming and labor-intensive, and the like, and provides a new cutting blade height adjustment structure for the lawn mower.

[0004] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0005] The cutting blade height adjustment structure of the lawn mower includes a machine base, a cutting blade assembly, a control system, and also includes a fixed seat, a lifting drive mechanism, a transmission assembly, a guide rail assembly, and a cutting blade assembly connecting seat. The fixed seat and the guide rail assembly are connected to the machine base, and the lifting drive mechanism and the transmission assembly are respectively arranged on the fixed seat. A lifting through hole is arranged on the machine base, and 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 assembly and cooperates with the transmission assembly. The lifting drive mechanism drives the cutting blade assembly connecting seat to move up and down at the lifting through hole through the transmission assembly. The cutting blade assembly is arranged on the cutting blade assembly connecting seat, and the lifting drive mechanism and the cutting blade assembly are respectively electrically connected to the control system; the transmission assembly includes a worm and a transmission gear, and a hollow The 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 drive mechanism is meshed with the transmission gear and drives the worm to rotate through the transmission gear, the cutting knife assembly connecting seat is provided with engaging teeth, the worm is meshed with the engaging teeth of the cutting knife assembly connecting seat and drives the cutting knife assembly connecting seat to move up and down; the cutting knife assembly connecting seat includes a seat body, a slider, and a coupling plate, the cutting knife 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 coupling plate is connected to the seat body, the engaging teeth are arranged on the other side of the coupling plate and mesh with the transmission assembly, and the transmission assembly drives the coupling plate to move up and down through the coupling teeth and drives the seat body to move synchronously.

[0006] Among them, the machine base is the bearing foundation of the entire structure, the fixed base is used to bear the lifting drive mechanism and the transmission assembly, the lifting drive mechanism is used to provide driving power, so that the power is transmitted to the cutting knife assembly connecting seat through the transmission assembly, and then the cutting knife assembly connecting seat can move up and down along the guide rail assembly at the lifting through hole, then the cutting knife assembly can realize the function of lifting up and down under the drive of the cutting knife assembly connecting seat to meet the needs of mowing at different heights.

[0007] The transmission gear meshes with the lifting drive mechanism and can be driven to rotate by the lifting drive mechanism, thereby driving the worm to rotate. During the rotation of the worm, the engaging teeth can be driven to move up and down, thereby driving the cutting knife assembly connecting seat to move up and down. The fixed seat positions the central axis by extending the central axis into the axis limit 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 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 the joint teeth to cooperate with the transmission assembly to receive the power transmitted by the transmission assembly. Through the mutual cooperation between the seat body, the slider and the joint plate, on the one hand, the up and down movement function of the cutting knife assembly connection seat is realized, and on the other hand, the disassembly, assembly and maintenance of the cutting knife assembly connection seat are more convenient.

[0009] Preferably, the above-mentioned lawn mower blade height adjustment structure also includes 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 an elastic force for the transmission gear toward the tooth seat.

[0010] Since the transmission gear is sleeved on the worm, and cooperates with the tooth seat of the worm through the male and female ratchets, and is tightened by the gear spring, after the worm drives the cutting knife assembly connecting seat to the top or bottom, if the lifting drive mechanism does not stop driving due to an unexpected situation, the transmission gear will not cause the worm to get stuck, but will continuously jump up and down on the worm along the surface of the male and female ratchets, thereby reducing its mechanical loss.

[0011] Preferably, in the above-mentioned cutting blade height adjustment structure of the lawn mower, a U-shaped groove is provided at the upper end of the seat body, a stop block is provided on one side of the inner surface of the U-shaped groove, the other side of the inner surface of the U-shaped groove cooperates with the stop block to form a disengagement space, and the upper end of the coupling plate is provided with a coupling protrusion that cooperates with the U-shaped groove of the seat body, the coupling protrusion is semi-cylindrical, the diameter of the coupling protrusion is larger than the disengagement space, and the radius of the coupling protrusion is smaller than the disengagement space.

[0012] The U-shaped groove, the stop block, the engagement protrusion, and the escape space cooperate with each other to realize the hanging design between the engagement plate and the seat body. During normal use, the engagement protrusion of the engagement plate can be blocked by the stop block in the U-shaped groove and cannot exit the U-shaped groove, so that the engagement plate can normally drive the seat body to move up and down when being driven by the transmission assembly. When the engagement plate needs to be disassembled, the engagement protrusion and the escape space can cooperate to allow the engagement plate to be quickly detached from or placed in the U-shaped groove, making disassembly and assembly more convenient.

[0013] Preferably, the above-mentioned cutting blade height adjustment structure of the lawn mower 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 coupling plate, and a rebound space for the compression spring is formed between the seat body and the coupling plate, and the coupling tooth is arranged on the other side of the lower part of the coupling plate and corresponds to the position of the compression spring, and the compression spring provides an elastic force for the coupling tooth toward the transmission assembly.

[0014] The setting of the rebound space can allow the coupling plate to have the margin to move away from the transmission assembly, and the cooperation between the compression spring and the coupling plate enables the coupling teeth of the coupling plate to elastically engage with the transmission assembly. During the transmission of the transmission assembly, if an unexpected situation occurs that causes the transmission assembly and the coupling teeth to be stuck, the coupling teeth can be pushed away from the transmission assembly to avoid sticking. During the continuous operation of the transmission assembly, the coupling teeth can re-engage with the transmission assembly through the rebound action of the compression spring, so that the coupling teeth can automatically prevent sticking and automatically return to their original position during the operation of the lawn mower, thereby improving the stability during use.

[0015] Preferably, in the above-mentioned cutting blade height adjustment structure of the lawn mower, the coupling plate comprises an upper plate, a middle plate and a lower plate, the upper plate and the lower plate are vertically arranged, the middle plate is transversely arranged and respectively connected to the lower end of the upper plate and the upper end of the lower plate, the coupling teeth are arranged on the other side surface of the lower part of the lower plate, and the coupling protrusion is arranged on the upper end of the upper plate.

[0016] Through the intermediate connection function of the middle section plate, the overall structural strength of the joint plate can be strengthened and the service life of the joint plate can be improved.

[0017] Preferably, in the above-mentioned mower blade height adjustment structure, a spring sleeve platform is provided on one side of the lower portion 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 better fix its position by being sleeved on the spring sleeve platform, thereby improving stability during use.

[0019] Preferably, in the above-mentioned mower blade height adjustment structure, the joining plate further comprises a reinforcing plate, and the reinforcing plate is transversely arranged and connected to the upper end of the upper plate.

[0020] The reinforcing plate can further enhance the structural strength of the joint protrusion and improve the service life.

[0021] Preferably, the above-mentioned lawn mower cutter height adjustment structure also includes a telescopic protective cover, a protective space is formed in the telescopic protective cover, the seat body and the lifting through hole are located in 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.

[0022] The telescopic protective cover can protect the seat body and the lifting through hole, preventing various grass clippings and debris from entering the seat body through the lifting through hole during mowing operations, thereby improving the cleanliness of the interior of the lawn mower.

[0023] Preferably, in the above-mentioned mower blade height adjustment structure, a barb is provided at the bottom of the base at the lifting through hole, a groove is formed between the barb and the bottom of the base, an upper clamping convex ring is formed at the upper end of the telescopic protective cover, and the telescopic protective cover is clamped in the groove through the upper clamping convex ring; a base body clamping groove is provided at the lower outer ring of the base body, a lower clamping convex ring is formed at the lower end of the telescopic protective cover, and the telescopic protective cover is clamped with the base body clamping groove through the lower clamping convex ring; the blade assembly It includes a cutting knife driving motor, a cutting knife, and a cutting knife isolation cover. The cutting knife driving motor is located in the base body and passes through the bottom of the base body to be connected to the cutting knife. The cutting knife isolation cover is located between the base body and the cutting knife, and the cutting knife isolation cover presses the lower snap-on convex ring of the telescopic protective cover into the base body slot; the cutting knife isolation cover includes an upper stopper and a side stopper that are connected to each other. The upper stopper presses the lower snap-on convex ring of the telescopic protective cover into the base body slot, and an arc-shaped ventilation hole is formed in an array on the side stopper.

[0024] Through the above structural arrangement, the connection between the telescopic protective cover and the machine base and the lower part of the base body can be made tighter and more stable.

[0025] The upper baffle can play an isolating role, isolating the cutter from the outside on the one hand, and isolating the lifting through hole from the cutter on the other hand, playing a good isolating role. The arc-shaped ventilation holes on the side baffles play a role in ventilation and heat dissipation, allowing the heat and water vapor generated during mowing to dissipate through the arc-shaped ventilation holes, avoiding the accumulation of heat and water vapor affecting the mowing effect.

[0026] Preferably, the above-mentioned lawn mower's cutter blade height adjustment structure also includes a lifting position checking mechanism, which is electrically connected to the control system, and cooperates with the cutter blade assembly connecting seat and is used to obtain the height of the cutter blade assembly connecting seat; a vertical rack is provided on the cutter blade assembly connecting seat, and the lifting position checking mechanism includes a potentiometer and a potentiometer gear, the potentiometer is provided on the fixed seat, 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 connection seat of the cutting knife assembly. Through the mutual cooperation between the potentiometer, the potentiometer gear and the vertical rack, the height adjustment of the connection seat of the cutting knife assembly can be made more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the cutting knife assembly of the present invention when it is at the bottom;

[0029] Figure 2 is a cross-sectional view of the cutting knife assembly of the present invention when it is at the bottom;

[0030] Figure 3 An exploded view of the cutter assembly of the present invention when it is at the bottom;

[0031] Figure 4 is a cross-sectional view of the cutting knife assembly of the present invention when it is at the top;

[0032] Figure 5 It is a structural schematic diagram of the cutter assembly, the fixing seat, the lifting drive mechanism, the guide rail assembly, and the cutter assembly connecting seat in the present invention;

[0033] Figure 6 It is an exploded view of the cutter assembly, the fixing seat, the lifting drive mechanism, the transmission assembly, the guide rail assembly, and the cutter assembly connecting seat in the present invention;

[0034] Figure 7 It is an exploded view of the fixing seat, lifting drive mechanism and transmission assembly in the present invention;

[0035] Figure 8 It is a cross-sectional view of the fixing seat and the transmission assembly in the present invention;

[0036] Fig. 9 It is a partial cross-sectional view of the fixing seat, lifting drive mechanism and transmission assembly in the present invention;

[0037] Fig.10 It is a structural schematic diagram of the connection seat of the cutting knife assembly in the present invention;

[0038] Fig.11 An exploded view of the connection seat of the cutter assembly in the present invention;

[0039] Fig.12 It is a cross-sectional view of the connection seat of the cutter assembly in the present invention;

[0040] Fig.13 It is a cross-sectional view of the fixing seat, the transmission assembly, and the connection seat of the cutter assembly in the present invention;

[0041] Fig.14 It is an exploded view of the fixing seat, lifting drive mechanism, transmission assembly, and cutting knife assembly connecting seat in the present invention;

[0042] Fig.15 It is a structural schematic diagram of the fixing seat, the cutting knife assembly connecting seat, and the lifting position inspection mechanism in the present invention;

[0043] Fig.16 It is a schematic diagram of the connection structure of the lifting drive mechanism, the cutting knife assembly, the lifting position inspection mechanism and the control system in the present invention. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-16 The present invention is further described in detail with specific embodiments, but they are not intended to limit the present invention:

[0045] The mower blade height adjustment structure includes a base 100, a mower blade assembly 200, a control system 300, a fixed base 400, a lifting drive mechanism 500, a transmission assembly 600, a guide rail assembly 700, and a mower blade assembly connecting base 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 arranged on the fixed base 400, the base 100 is provided with a lifting through hole 110, the mower blade assembly connecting base 800 passes through the lifting through hole 110, and the mower blade assembly connecting base 800 passes through the lifting through hole 110. The 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 knife assembly connection seat 800 to move up and down at the lifting through hole 110 through the transmission assembly 600. The knife assembly 200 is arranged on the knife assembly connection seat 800. The lifting drive mechanism 500 and the knife assembly 200 are electrically connected to the control system 300 respectively; the transmission assembly 600 includes a worm 610 and a transmission gear 620. The worm 610 is provided with a hollow shaft limit space. The fixing seat 400 is provided with a central shaft 410, and the central shaft 410 extends into the shaft limiting space 611 of the worm 610. The transmission gear 620 cooperates with the worm 610, and the lifting drive mechanism 500 meshes with the transmission gear 620 and drives the worm 610 to rotate through the transmission gear 620. The cutting knife assembly connecting seat 800 is provided with engaging teeth 831, and 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; the cutting knife assembly connecting seat 800 includes a base body 810, a slider 820, and a coupling plate 830. The cutting knife assembly 200 is connected to the base body 810. One side of the slider 820 is connected to the base body 810, and 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 base 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 base body 810 to move synchronously.

[0046] Preferably, 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 cooperates with the female ratchet 613 of the tooth seat 612, the gear spring 630 cooperates with the transmission gear 620 and provides the transmission gear 620 with an elastic force toward the tooth seat 612.

[0047] When height adjustment is required, the lifting drive mechanism 500 starts to operate and transmits power to the transmission assembly 600, and then transmits power to the cutter assembly connecting seat 800 through the transmission assembly 600, so that the cutter assembly connecting seat 800 moves upward or downward 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 adaptation 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 the control signal of the control system 300 to rotate forward or reverse, thereby driving the lifting drive gear to rotate. When the lifting drive gear rotates, it drives the transmission gear 620 meshing with the lifting drive gear to rotate, and then the transmission gear 620 drives the worm 610 to rotate through the male ratchet 621 and the female ratchet 613. As the worm 610 rotates forward or reversely, the engaging teeth 831 are driven to move upward or downward, thereby causing the cutting knife assembly connecting seat 800 to move up and down along the guide rail assembly 700.

[0049] When the cutting knife assembly connecting seat 800 moves upward or downward into position, if the lifting drive mechanism 500 does not stop driving due to an unexpected situation, then when the cutting knife assembly connecting seat 800 can no longer move upward or downward, the worm 610 can no longer be rotated, and the transmission gear 620 will rotate while rising and falling along the tooth surface of the female ratchet 613, so that the power is disconnected at the junction of the transmission gear 620 and the worm 610, avoiding the situation in which the lifting drive mechanism 500 is stuck due to the transmission gear 620 being stuck, thereby improving safety during use.

[0050] Preferably, a U-shaped groove 811 is provided at the upper end of the seat body 810, and a stop block 812 is provided on one side of the inner surface of the U-shaped groove 811, and 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, and the coupling protrusion 832 is semi-cylindrical, and 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.

[0051] When the joint plate 830 is assembled to the seat body 810, the joint plate 830 can be rotated to a horizontal position so that the joint protrusion 832 on the joint plate 830 is aligned with the U-shaped groove 811 at the upper end of the seat body 810. At this time, the width direction size of the joint protrusion 832 is the radius size of the joint protrusion 832, and the joint protrusion 832 can smoothly enter the U-shaped groove 811 from the escape space 813 of the U-shaped groove 811 in this position. After entering, the joint plate 830 is then rotated to rotate the joint plate 830 to a vertical position. At this time, the width direction size of the joint protrusion 832 is the diameter size of the joint protrusion 832, and the joint protrusion 832 will be blocked by the stop block 812 of the U-shaped groove 811 in this position and cannot escape, thereby completing the assembly of the joint plate 830. Similarly, when the coupling plate 830 needs to be removed from the base 810, the coupling protrusion 832 of the coupling plate 830 can be easily and quickly removed from the U-shaped groove 811 on the base 810 by simply performing the reverse operation, which makes maintenance and replacement faster.

[0052] When the engaging tooth 831 is driven by the worm 610 to move upward, 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-slip block 812 upward to drive the entire seat body 810 to move upward, so that the seat body 810 moves upward along the guide rail assembly 700 through the slider 820.

[0053] When the engaging tooth 831 is driven by the worm 610 to move downward, 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 to drive the entire seat body 810 to move downward, so that the seat body 810 moves downward along the guide rail assembly 700 through the slider 820.

[0054] Preferably, it also includes a compression spring 840, one end of which cooperates with the seat body 810, and the other end of the compression spring 840 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.

[0055] When the worm 610 is in normal operation, the compression spring 840 will press the engagement teeth 831 on the engagement plate 830 toward the worm 610 to ensure the normal cooperation between the engagement teeth 831 and the worm 610. When an unexpected situation occurs and causes a tendency for the engagement teeth 831 and the worm 610 to become stuck, the force generated by the worm 610 during rotation will exceed the pressure provided by the compression spring 840, thereby moving the engagement teeth 831 away from the worm 610, that is, toward the rebound space 850, so that the engagement teeth 831 can be separated from the worm 610 to avoid being stuck. After the engagement tooth 831 is separated from the worm 610, the engagement tooth 831 is pressed back to the worm 610 under the elastic force of the compression spring 840. If the engagement tooth 831 can normally cooperate with the worm 610 at this time, the engagement tooth 831 and the worm 610 will return to the normal operation state; if the engagement tooth 831 and the worm 610 still have a tendency to get stuck or cannot cooperate normally at this time, the engagement tooth 831 will be pushed again to move in the direction of the rebound space 850. Through such repeated movements between the engagement tooth 831 and the worm 610, the engagement tooth 831 and the worm 610 can be prevented from getting stuck, thereby improving the fault tolerance rate during operation.

[0056] Preferably, the coupling 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 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, and the coupling protrusion 832 is arranged at the upper end of the upper plate 833.

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

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

[0059] Preferably, a telescopic protective cover 860 is further included, wherein a protective space 861 is formed in the telescopic protective cover 860, the seat body 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 seat body 810.

[0060] Preferably, a barb 120 is provided at the bottom of the base 100 at the lifting through hole 110, and a groove 130 is formed between the barb 120 and the bottom of the base 100. An upper snap-fitting convex ring 862 is formed at the upper end of the telescopic protective cover 860, and the telescopic protective cover 860 is snapped into the groove 130 through the upper snap-fitting convex ring 862; a base body snap-fitting groove 814 is provided at the lower outer ring of the base body 810, and a lower snap-fitting convex ring 863 is formed at the lower end of the telescopic protective cover 860, and the telescopic protective cover 860 is snapped into the base body snap-fitting groove 814 through the lower snap-fitting convex ring 863; the cutting knife assembly 200 includes a cutting knife drive motor 210, a cutting knife 2 20. A cutting knife isolation cover 230. The cutting knife drive 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. The cutting knife isolation cover 230 is located between the seat body 810 and the cutting knife 220, and the cutting knife isolation cover 230 presses the lower snap-fitting convex ring 863 of the telescopic protective cover 860 against the seat body slot 814; the cutting knife isolation cover 230 includes an upper stopper 231 and a side stopper 232 that are interconnected. The upper stopper 231 presses the lower snap-fitting convex ring 863 of the telescopic protective cover 860 against the seat body slot 814, and an arc-shaped ventilation hole 233 is formed in an array on the side stopper 232.

[0061] Preferably, it also includes a lifting position checking mechanism 900, which is electrically connected to the control system 300, and 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 includes a potentiometer 910 and a potentiometer gear 920, and the potentiometer 910 is arranged on the fixed seat 400, and the potentiometer gear 920 is rotatably connected to the potentiometer 910 and meshes with the vertical rack 870.

[0062] During the lifting and lowering process of the cutting knife assembly connecting seat 800, the vertical rack 870 on the seat body 810 will drive the potentiometer gear 920 to rotate synchronously, thereby providing corresponding data to the potentiometer 910 through the potentiometer gear 920, and 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 conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of 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); the cutting knife assembly connecting seat (800) is slidably connected to the guide rail assembly (700) and is connected to the machine base (100); 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); the lifting drive mechanism (500) and the cutting knife assembly (200) are respectively electrically connected to the control system (300); 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), the central axis (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 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; the cutting knife assembly connecting seat (800) includes a seat body (810) ), a slider (820), and a coupling plate (830), the cutting knife assembly (200) is connected to the base body (810), one side of the slider (820) is connected to the base 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 base body (810), the coupling teeth (831) are arranged on the other side of the coupling plate (830) and mesh with the transmission assembly (600), and the transmission assembly (600) drives the coupling plate (830) to move up and down through the coupling teeth (831) and drives the base body (810) to move synchronously.

2. The mower blade height adjustment structure according to claim 1, 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).

3. The mower blade height adjustment structure according to claim 1, 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), and 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), and the coupling protrusion (832) is semi-cylindrical, and 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).

4. The mower blade height adjustment structure according to claim 3, 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 the compression spring (840) 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).

5. The mower blade height adjustment structure according to claim 4, characterized in that: The coupling 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 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), and the coupling protrusion (832) is arranged on the upper end of the upper plate (833).

6. The mower blade height adjustment structure according to claim 5, characterized in that: A spring sleeve platform (836) is provided on one side of the lower portion of the lower section plate (835), and the other end of the compression spring (840) is sleeved with the spring sleeve platform (836).

7. The mower blade height adjustment structure according to claim 5, characterized in that: The joint plate (830) further comprises a reinforcing plate (837), wherein the reinforcing plate (837) is disposed transversely and connected to the upper end of the upper section plate (833).

8. The mower blade height adjustment structure according to claim 1, characterized in that: The machine 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 plurality of cutting knife components. , 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 with the cutting knife (220), the cutting knife isolation cover (230) is located between the seat body (810) and the cutting knife (220), and the cutting knife isolation cover (230) presses the lower snap-fitting convex ring (863) of the telescopic protective cover (860) against the seat body slot (814); the cutting knife isolation cover (230) includes an upper stopper (231) and a side stopper (232) which are connected to each other, the upper stopper (231) presses the lower snap-fitting convex 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), wherein the potentiometer (910) is arranged on the fixing seat (400), and the potentiometer gear (920) is rotationally connected to the potentiometer (910) and meshes with the vertical rack (870).

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