A lawn fertilizing device

Abstract

The application relates to the technical field of fertilizing devices, and discloses a lawn fertilizing device which comprises a vehicle body, a hopper, a row of plug-in pipe assemblies arranged on a vehicle frame, a discharging mechanism arranged at the bottom of the hopper, a sleeve pipe, a plug-in pipe, a conical plug arranged at the lower end of the plug-in pipe, a discharging port arranged at the sidewall of the lower end of the plug-in pipe, a first compression spring arranged at the outer side of the plug-in pipe, a lifting mechanism arranged on the vehicle frame, a limiting mechanism arranged between the vehicle frame and the plug-in pipe, a material pipe arranged at the lower end of the quantitative discharging mechanism, and the material pipe is slidably extended into the plug-in pipe. The lawn fertilizing device has the beneficial effects of convenient use, high fertilizing efficiency and the ability to directly put granular fertilizers into the lower soil layer of the lawn.

Description

Technical Field

[0001] This invention relates to the field of fertilization devices, and more particularly to a lawn fertilization device. Background Technology

[0002] Lawn maintenance is an essential part of urban construction, municipal engineering, and landscaping. Fertilization is an indispensable aspect of lawn maintenance. Currently, traditional methods such as manual spreading or spraying liquid fertilizer are commonly used. Because lawns are laid on the soil surface, when granular fertilizer is spread, most of the granules remain on the lawn surface and have difficulty penetrating the soil. To improve fertilizer utilization, holes are first made in the lawn surface, and then the granular fertilizer is placed into the holes. However, given the large area of ​​lawns, manual hole-making and fertilization are inefficient and labor-intensive. Summary of the Invention

[0003] In order to solve the above-mentioned problems in the prior art, the present invention provides a lawn fertilization device that is easy to use, has high fertilization efficiency, and can directly put granular fertilizer into the subsoil layer of the lawn.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A lawn fertilization device includes a vehicle body capable of traveling on lawns, a hopper for storing fertilizer mounted on the upper part of the vehicle frame, a row of insert tube assemblies located below the storage hopper on the vehicle frame, and a metering dispensing mechanism corresponding to the insert tube assemblies at the bottom of the hopper; each insert tube assembly includes a sleeve that slides and rises with the vehicle frame, and an insert tube that slides through the sleeve, the lower end of the insert tube having a conical plug that abuts against the lower end of the sleeve, a discharge port on the lower side wall of the insert tube, the upper end of the insert tube extending beyond the sleeve, and a first compression spring fitted on the outer side of the insert tube between the upper end of the sleeve and the upper end of the insert tube; the vehicle frame is equipped with a mechanism for... A lifting mechanism drives the sleeve to rise and fall; a limiting mechanism is provided between the frame and the insertion tube; a material tube is provided at the lower end of the quantitative discharging mechanism, and the material tube slides into the insertion tube; when the lifting mechanism drives the sleeve to fall from the first position to the second position, the conical plug is inserted into the soil layer, the insertion tube is limited by the limiting mechanism, and the discharging mechanism sends a quantitative amount of fertilizer into the material tube; when the lifting mechanism drives the sleeve to rise, the sleeve rises so that the discharge port is opened and the fertilizer falls from the discharge port into the soil; when the lifting mechanism drives the sleeve to rise to the first position, the limiting mechanism is released, the insertion tube rises to the first position under the action of the first compression spring, and the discharge port is closed.

[0005] By adopting the above technical solution: during use, the lifting mechanism drives the insertion tube assembly to descend, and the conical plug pierces the lawn and inserts into the soil. During the insertion process, the quantitative dispensing mechanism delivers a quantitative amount of fertilizer granules into the insertion tube. Then, the sleeve rises, the discharge port opens, and the fertilizer falls from the discharge port into the soil layer. The limiting mechanism releases the limit, and the insertion tube and sleeve return to the first position. After the vehicle moves forward a certain distance, the above actions are repeated to achieve continuous fertilization operation.

[0006] Preferably, the quantitative discharging mechanism includes a base installed at the bottom of the hopper, a rotatable cylinder housed within the base, and a main shaft driving the cylinder to rotate. One end of the main shaft is equipped with a first motor. The upper end of the base has a feed inlet, and the lower end has a discharge inlet. A feed port is located at the bottom of the hopper corresponding to the feed inlet. The upper end of the feed pipe is connected to the discharge inlet. At least one quantitative trough is provided on the circular surface of the cylinder. When the quantitative trough rotates upwards, it connects to the feed inlet, and fertilizer from the hopper enters the quantitative trough through the feed port. When the quantitative trough rotates downwards, it connects to the discharge inlet, and fertilizer from the quantitative trough falls into the feed pipe. After the quantitative trough takes material from the feed inlet, it feeds the fertilizer into the discharge inlet. The feeding amount can be adjusted by selecting the rotation speed of the cylinder as needed.

[0007] Preferably, the base is provided with baffles at both ends of the material cylinder, and the inner side of the baffle is provided with bearings, through which the main shaft passes and is rotatably connected to the end cover.

[0008] Preferably, a sliding sleeve is fixedly provided at the bottom of the frame, and the sleeve passes through the sliding sleeve to form a sliding connection. A lifting seat is fixedly provided at the upper end of the sleeve. The lifting mechanism includes a lead screw and a second motor connected to the lower end of the lead screw. A lead screw seat is provided on the frame, and the lead screw passes vertically through the lifting seat to form a threaded connection with the lifting seat. The upper end of the lead screw is rotatably connected to the lead screw seat. The second motor drives the lead screw to rotate, thereby realizing the lifting and lowering of the sleeve.

[0009] Preferably, the limiting mechanism includes a limiting tube fixed to the bottom of the frame and a limiting post slidably connected to the limiting tube. The upper end of the limiting post is fixedly connected to the upper end of the insertion tube via a connecting seat. The surface of the limiting post is provided with an annular limiting groove. Elastic limiting components are provided on both sides of the limiting tube. The upper end of the sleeve is provided with an unlocking component for releasing the limiting mechanism. When the insertion tube descends to the second position, the annular limiting groove descends to the position corresponding to the elastic limiting component and is limited. When the sleeve rises to the first position, the unlocking component releases the elastic limiting component, so that the insertion tube returns to the first position under the action of the first compression spring.

[0010] Preferably, the elastic limiting component includes a connecting sleeve and a sliding pin slidably disposed within the connecting sleeve. The inner end of the connecting sleeve is vertically and fixedly connected to the side wall of the limiting tube. The outer end of the connecting sleeve is provided with an end cap. A second compression spring is provided between the sliding pin and the end cap. The side wall of the limiting tube is provided with an insertion hole communicating with the inner end of the connecting sleeve. The lower end of the limiting post has a tapered structure. When the insertion tube and the limiting post descend to the second position, the inner end of the sliding pin extends into the annular limiting groove to limit the limiting post.

[0011] Preferably, the side wall of the connecting sleeve is provided with inclined grooves, and a drive rod is fixedly provided on the side of the sliding sleeve. The outer end of the drive rod extends out of the connecting sleeve through the elongated groove. The unlocking assembly includes a lever and a lever bracket. One end of the lever bracket is fixedly connected to the lever, and the other end of the lever bracket is fixedly connected to the upper end of the sleeve. When the sleeve rises from the second state to the first state, the lever pushes the drive rod to move along the inclined groove, causing the sliding pin to disengage from the annular limiting groove and release the limiting.

[0012] Preferably, the lower end face of the conical plug is configured as a first conical surface, wider at the top and narrower at the bottom; the upper end of the conical plug has a second conical surface, narrower at the top and wider at the bottom; and the lower end of the sleeve has a third conical surface that abuts against the second conical surface. The upper end of the conical plug also has a cone-shaped body extending into the insertion tube. An annular gap is formed between the surface of the cone-shaped body and the inner wall of the insertion tube. Multiple discharge ports are configured and evenly distributed along the circumference of the insertion tube, and the inner end of each discharge port communicates with the annular gap. Fertilizer falls and is stored in the annular gap between the cone-shaped body and the sleeve. When the discharge port is opened, the fertilizer can fall more smoothly from the discharge port.

[0013] Preferably, the frame is provided with adjustment seats on both sides, and the adjustment seats are connected to handrails; the outer side of the adjustment seat is provided with a locking handle, and the adjustment seat is provided with a through hole, through which the handrail slides and is fastened by the locking handle.

[0014] Preferably, the side of the frame is provided with a protective plate, wherein the side plates located on the front and rear sides of the frame are provided with heat dissipation grooves to facilitate airflow.

[0015] Therefore, the present invention has the advantages of being easy to use, having high fertilization efficiency, and being able to directly inject granular fertilizer into the subsoil layer of lawn. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one structure of the present invention.

[0017] Figure 2 for Figure 1 Another perspective view.

[0018] Figure 3 This is a schematic diagram of the internal structure of the vehicle frame.

[0019] Figure 4 for Figure 3 Sectional view at point AA.

[0020] Figure 5 This is a connection diagram of the quantitative dispensing mechanism, the tube insertion assembly, and the limiting mechanism.

[0021] Figure 6 This is a schematic diagram showing the connection between the lifting mechanism and the lifting seat.

[0022] Figure 7 This is a schematic diagram showing the cannula and insertion tube in the first position.

[0023] Figure 8 This is a schematic diagram showing the cannula and insertion tube descending to the second position.

[0024] Figure 9 This is a schematic diagram showing the cannula in the second position and the cannula raised to the first position.

[0025] Figure 10 This is an exploded view of the quantitative dispensing mechanism.

[0026] Figure 11 This is a schematic diagram of the limiting mechanism.

[0027] Figure 12 This is a schematic diagram showing the limit post in the limit position.

[0028] Figure 13 This is an exploded view of the conical plug and its insertion tube.

[0029] Figure 14 for Figure 8 Enlarged view of a section at point B in the middle. Figure 15 for Figure 9 A magnified view of a portion of point C in the middle. Detailed Implementation

[0030] To make the technical problems to be solved, the technical solutions, and the beneficial technical effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this invention.

[0031] It should be understood that the terms "first," "second," etc., used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly specifying the number of technical features indicated. Features specified as "first" or "second" may expressly or implicitly indicate that at least one of those features is included.

[0032] like Figures 1-9The illustrated lawn fertilization device includes a vehicle body 1 that can travel on lawns and a hopper 3 for storing fertilizer mounted on the upper part of a frame 2 of the vehicle body 1. The device is characterized by a row of tube assemblies 4 located below the storage hopper on the frame 2, and a quantitative dispensing mechanism 5 corresponding to the tube assembly 4 located at the bottom of the hopper. Each tube assembly 4 includes a sleeve 40 that slides and rises with the frame 2, and a tube 41 that slides through the sleeve 40. The lower end of the tube 41 has a conical plug 42 that abuts against the lower end of the sleeve 40. A discharge port 410 is located on the lower side wall of the tube 41. The upper end of the tube 41 extends beyond the sleeve 40. A first compression spring 43 is fitted on the outer side of the tube 41 between the upper end of the sleeve 40 and the upper end of the tube 41 body. The frame 2 is equipped with a mechanism for driving... The lifting mechanism 6 raises and lowers the sleeve 40; a limiting mechanism 7 is provided between the frame 2 and the insertion tube 41; a material tube 50 is provided at the lower end of the quantitative discharge mechanism 5, and the material tube 50 slides into the insertion tube 41; when the lifting mechanism 6 drives the sleeve 40 to descend from the first position to the second position, the conical plug 42 is inserted into the soil layer, the insertion tube 41 is limited by the limiting mechanism 7, and the discharge mechanism sends a quantitative amount of fertilizer into the material tube 50; when the lifting mechanism 6 drives the sleeve 40 to rise, the sleeve 40 rises so that the discharge port 410 is opened and the fertilizer falls from the discharge port 410 into the soil; when the lifting mechanism 6 drives the sleeve 40 to rise to the first position, the limiting mechanism 7 is released, the insertion tube 41 rises to the first position under the action of the first compression spring 43, and the discharge port 410 is closed.

[0033] The frame 2 has adjustable seats 25 on both sides, and handles 21 are connected to the adjustable seats 25. A locking handle 22 is provided on the outer side of the adjustable seats 25. The adjustable seats 25 have through holes, through which the handles 21 slide and are secured by the locking handle 22. Protective plates 23 are provided on the sides of the frame 2, with cooling vents 24 on the front and rear side plates to facilitate airflow. The vehicle body can be either an automatically moving vehicle or a manually pushed / pulled vehicle.

[0034] like Figure 4 and Figure 10As shown, the quantitative discharge mechanism 5 includes a base 51 installed at the bottom of the hopper 3, a material cylinder 52 rotatably installed in the base 51, and a main shaft 53 that drives the material cylinder 52 to rotate. One end of the main shaft 53 is equipped with a first motor 54. The upper end of the base 51 is provided with a feeding port 510, and the lower end of the base 51 is provided with a discharging port 511. The bottom of the hopper 3 is provided with a feed inlet 30 corresponding to the feeding port 510. The upper end of the material pipe 50 is connected to the discharging port 511. At least one quantitative material trough 520 is provided on the circular surface of the material cylinder 52. When the quantitative material trough 520 rotates to face upward, the quantitative material trough 520 is connected to the feeding port 510, and the fertilizer in the hopper 3 enters the quantitative material trough 520 from the feed inlet 30. When the quantitative material trough 520 rotates to face downward, the quantitative material trough 520 is connected to the discharging port 511, and the fertilizer in the quantitative material trough 520 falls into the material pipe 50. The base 51 is provided with baffles 55 at both ends of the material cylinder 52. The inner side of the baffles 55 is provided with bearings 56, and the main shaft 53 passes through the bearings to form a rotatable connection with the baffles.

[0035] A sliding sleeve 20 is fixedly installed at the bottom of the frame 2, and a sleeve 40 passes through the sliding sleeve 20 to form a sliding connection. A lifting seat 44 is fixedly installed at the upper end of the sleeve 40; for example Figure 6 As shown, the lifting mechanism 6 includes a lead screw 60 and a second motor 61 connected to the lower end of the lead screw 60. The frame 2 is provided with a lead screw seat 62. The lead screw 60 passes vertically through the lifting seat 44 and forms a threaded connection with the lifting seat 44. The upper end of the lead screw 60 is rotatably connected to the lead screw seat 60.

[0036] like Figure 7 , Figure 11 and Figure 12 As shown, the limiting mechanism 7 includes a limiting tube 70 fixed to the bottom of the frame 2 and a limiting post 71 slidably connected to the limiting tube 70. The upper end of the limiting post 71 is fixedly connected to the upper end of the insertion tube 41 through a connecting seat 74. The surface of the limiting post 71 is provided with an annular limiting groove 710. The two sides of the limiting tube 70 are provided with elastic limiting components 72. The upper end of the sleeve 40 is provided with an unlocking component 73 for releasing the limiting mechanism 7. When the insertion tube 41 descends to the second position, the annular limiting groove 710 descends to the position corresponding to the elastic limiting component 72 and is limited. When the sleeve 40 rises to the first position, the unlocking component 73 releases the elastic limiting component, so that the insertion tube 41 is reset to the first position under the action of the first compression spring 43.

[0037] The elastic limiting assembly 72 includes a connecting sleeve 720 and a sliding pin 721 slidably disposed within the connecting sleeve 720. The inner end of the connecting sleeve 720 is vertically and fixedly connected to the side wall of the limiting tube 70. The outer end of the connecting sleeve 720 is provided with an end cap 722. A second compression spring 723 is provided between the sliding pin 721 and the end cap 722. The side wall of the limiting tube 70 is provided with an insertion hole 700 communicating with the inner end of the connecting sleeve 720. The lower end of the limiting post 71 has a tapered structure. When the insertion tube 41 and the limiting post 71 descend to the second position, the inner end of the sliding pin 721 extends into the annular limiting groove 710 to limit the limiting post 71. The side wall of the connecting sleeve 720 is provided with inclined groove holes 724. A drive rod 725 is fixedly provided on the side of the sliding sleeve 20. The outer end of the drive rod 725 extends out of the connecting sleeve 720 through the elongated groove hole. like Figure 6 As shown, the unlocking component 73 includes a lever 730 and a lever bracket 731. One end of the lever bracket 731 is fixedly connected to the lever 730, and the other end of the lever bracket 731 is fixedly connected to the upper end of the sleeve 40. When the sleeve 40 rises from the second state to the first state, the lever 730 pushes the drive rod 725 to move along the inclined slot 724, causing the sliding pin 721 to disengage from the annular limiting groove 710 and release the limiting.

[0038] like Figure 14 and Figure 15 As shown, the lower end face of the conical plug 42 is configured as a first conical surface 420 that is larger at the top and smaller at the bottom, and the upper end of the conical plug 42 is configured as a second conical surface 421 that is smaller at the top and larger at the bottom. The lower end of the sleeve 40 is configured as a third conical surface 400 that abuts against the second conical surface. The upper end of the conical plug 42 is also configured as a cone 422 that extends into the insertion tube 41. An annular gap is formed between the surface of the cone 422 and the inner wall of the insertion tube 41. Multiple discharge ports are configured and evenly distributed along the circumference of the insertion tube 41. The inner end of the discharge port is connected to the annular gap.

[0039] Referring to the accompanying drawings, the principle of the present invention is as follows: Figure 4 , Figure 7 As shown, the fertilizer is stored in the hopper 3. In the initial state, both the sleeve 40 and the insertion tube 41 are in the position. Figure 7 In the first position shown, the lifting mechanism lowers all the sleeves 40. Because the tapered plug 42 at the lower end of the insertion tube abuts against the lower end of the sleeve, the insertion tube and sleeve will descend synchronously. Figure 8 ( Figure 8The second position (the area below the dotted line is the soil layer) is shown. Simultaneously, the annular limiting groove 710 on the limiting post 71 descends to the sliding pin 721 and is limited by the sliding pin. During this process, the first motor drives the material cylinder to rotate from the upper feeding port to the lower feeding port, conveying the fertilizer in the metering trough to the material pipe 50. Under gravity, the fertilizer falls into the annular gap between the cone 422 and the insertion tube 41. Because the discharge port 410 is closed by the sleeve, the fertilizer cannot fall at this time. Then, the lifting mechanism drives the sleeve to rise to the first position. Because the insertion tube is limited by the limiting mechanism and cannot rise, the discharge port is opened. The state at this time is as follows: Figure 9 As shown, the fertilizer is discharged from outlet 410 according to... Figure 15 The tube falls into the soil hole in the direction indicated by the middle arrow. As the sleeve continues to rise, when it returns to the first position, the lever at the upper end of the sleeve moves to the drive rod and rotates the drive rod upward by an angle. The sliding pin moves outward and disengages from the annular limiting groove 710 of the limiting post. At this time, the insertion tube returns to the first position under the action of the first compression spring, thus completing a complete insertion and fertilizer application action. After the vehicle moves forward a certain distance, the above actions are repeated, thereby realizing rapid fertilization of the lawn. This fertilization device can directly put granular fertilizer into the soil layer below the lawn, avoiding fertilizer waste and allowing the fertilizer to be better absorbed by the soil and lawn.

[0040] In the description of this invention, it should be understood that the directions or positional relationships indicated by up, down, left, right, inner end, outer end, one end, and the other end are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the purpose of more clearly describing the technical solutions of this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting this invention.

[0041] Although specific embodiments of the invention have been described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of the invention. Various substitutions, alterations, and modifications can be conceived without departing from the spirit and scope of the invention.

Claims

1. A lawn fertilization device, comprising a vehicle body (1) capable of traveling on a lawn, and a hopper (3) for storing fertilizer mounted on the upper end of a frame (2) of the vehicle body (1), characterized in that, A row of tube assemblies (4) is provided on the lower side of the storage tank on the frame (2), and a quantitative discharge mechanism (5) corresponding to the tube assembly (4) is provided at the bottom of the hopper. The insertion tube assembly (4) includes a sleeve (40) that slides and lifts with the frame (2) and an insertion tube (41) that slides through the sleeve (40). The lower end of the insertion tube (41) is provided with a tapered plug (42) that abuts against the lower end of the sleeve (40). The lower end side wall of the insertion tube (41) is provided with a discharge port (410). The upper end of the insertion tube (41) extends out of the sleeve (40). A first compression spring (43) is sleeved on the outer side of the insertion tube (41) between the upper end of the sleeve (40) and the upper end of the insertion tube (41). The frame (2) is provided with a lifting mechanism (6) for driving the sleeve (40) to rise and fall. A limiting mechanism (7) is provided between the frame (2) and the insertion tube (41), and a material tube (50) is provided at the lower end of the quantitative discharging mechanism (5), and the material tube (50) slides into the insertion tube (41); When the lifting mechanism (6) drives the sleeve (40) to descend from the first position to the second position, the conical plug (42) is inserted into the soil layer, the insertion tube (41) is limited by the limiting mechanism (7), and the discharge mechanism sends a fixed amount of fertilizer into the material pipe (50); when the lifting mechanism (6) drives the sleeve (40) to rise, the sleeve (40) rises so that the discharge port (410) is opened and the fertilizer falls from the discharge port (410) into the soil; when the lifting mechanism (6) drives the sleeve (40) to rise to the first position, the limiting mechanism (7) releases the limit, the insertion tube (41) rises to the first position under the action of the first compression spring (43), and the discharge port (410) is closed; The limiting mechanism (7) includes a limiting tube (70) fixed to the bottom of the frame (2) and a limiting post (71) slidably connected to the limiting tube (70). The upper end of the limiting post (71) is fixedly connected to the upper end of the insertion tube (41) through a connecting seat (74). The surface of the limiting post (71) is provided with an annular limiting groove (710). The two sides of the limiting tube (70) are provided with elastic limiting components (72). The upper end of the sleeve (40) is provided with an unlocking component (73) for releasing the limiting mechanism (7). When the insertion tube (41) descends to the second position, the annular limiting groove (710) descends to the position corresponding to the elastic limiting component (72) and is limited. When the sleeve (40) rises to the first position, the unlocking component (73) releases the elastic limiting component, so that the insertion tube (41) is reset to the first position under the action of the first compression spring (43). The elastic limiting component (72) includes a connecting sleeve (720) and a sliding pin (721) slidably disposed in the connecting sleeve (720). The inner end of the connecting sleeve (720) is vertically fixedly connected to the side wall of the limiting tube (70). The outer end of the connecting sleeve (720) is provided with an end cap (722). A second compression spring (723) is provided between the sliding pin (721) and the end cap (722). The side wall of the limiting tube (70) is provided with an insertion hole (700) communicating with the inner end of the connecting sleeve (720). The lower end of the limiting post (71) has a tapered structure. When the insertion tube (41) and the limiting post (71) descend to the second position, the inner end of the sliding pin (721) extends into the annular limiting groove (710) to limit the limiting post (71).

2. The lawn fertilization device according to claim 1, characterized in that, The quantitative discharge mechanism (5) includes a base (51) installed at the bottom of the hopper (3), a rotatable cylinder (52) installed in the base (51), and a main shaft (53) that drives the cylinder (52) to rotate. One end of the main shaft (53) is provided with a first motor (54). The upper end of the base (51) is provided with a feed port (510), and the lower end of the base (51) is provided with a discharge port (511). The bottom of the hopper (3) is provided with a feed inlet (30) corresponding to the feed port (510). The upper end of the material pipe (50) is connected to the discharge port (511). The cylindrical tube (52) has at least one metering trough (520) on its circular surface. When the metering trough (520) is rotated to face upward, the metering trough (520) is connected to the feed inlet (510), and the fertilizer in the hopper (3) enters the metering trough (520) from the feed inlet (30). When the metering trough (520) is rotated to face downward, the metering trough (520) is connected to the discharge inlet (511), and the fertilizer in the metering trough (520) falls into the feed pipe (50).

3. A lawn fertilization device according to claim 2, characterized in that, The base (51) is provided with baffles (55) at both ends of the material cylinder (52). The inner side of the baffle (55) is provided with bearings (56). The main shaft (53) passes through the bearing and forms a rotatable connection with the baffle (55).

4. The lawn fertilization device according to claim 1, characterized in that, The bottom of the frame (2) is fixedly provided with a sliding sleeve (20), the sleeve (40) passes through the sliding sleeve (20) to form a sliding connection, and the upper end of the sleeve (40) is fixedly provided with a lifting seat (44). The lifting mechanism (6) includes a lead screw (60) and a second motor (61) connected to the lower end of the lead screw (60). The frame (2) is provided with a lead screw seat (62). The lead screw (60) passes vertically through the lifting seat (44) and forms a threaded connection with the lifting seat (44). The upper end of the lead screw (60) is rotatably connected to the lead screw seat (60).

5. A lawn fertilization device according to claim 4, characterized in that, The side wall of the connecting sleeve (720) is provided with inclined slot holes (724), and the side of the sliding sleeve (20) is fixed with a driving rod (725). The outer end of the driving rod (725) extends out of the connecting sleeve (720) through the long slot hole. The unlocking component (73) includes a lever (730) and a lever bracket (731). One end of the lever bracket (731) is fixedly connected to the lever (730), and the other end of the lever bracket (731) is fixedly connected to the upper end of the sleeve (40). When the sleeve (40) rises from the second state to the first state, the lever (730) pushes the drive rod (725) to move along the inclined slot (724), so that the sliding pin (721) is dislodged from the annular limiting groove (710) and the limiting is released.

6. A lawn fertilization device according to claim 1, characterized in that, The lower end face of the conical plug (42) is configured as a first conical surface (420) that is larger at the top and smaller at the bottom, the upper end of the conical plug (42) is configured as a second conical surface (421) that is smaller at the top and larger at the bottom, and the lower end of the sleeve (40) is configured as a third conical surface (400) that abuts against the second conical surface. The upper end of the conical plug (42) is also provided with a cone (422) that extends into the insertion tube (41). The surface of the cone (422) and the inner wall of the insertion tube (41) form an annular gap. The discharge port (410) is configured in multiple ways and is evenly distributed along the circumference of the insertion tube (41). The inner end of the discharge port (410) is connected to the annular gap.

7. A lawn fertilization device according to claim 1, characterized in that, The frame (2) has adjustment seats (25) on both sides, and a handrail (21) is connected to the adjustment seat (25); a locking handle (22) is provided on the outside of the adjustment seat (25), and a through hole is provided on the adjustment seat (25). The handrail (21) slides through the through hole and is fastened by the locking handle (22).

8. A lawn fertilization device according to claim 1 or 7, characterized in that, The side of the frame (2) is provided with a protective plate (23), wherein the side plates located on the front and rear sides of the frame (2) are provided with heat dissipation grooves (24) to facilitate airflow.

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