CN114830912A

CN114830912A - Convenient height-adjusting's weeder

Info

Publication number: CN114830912A
Application number: CN202210635319.6A
Authority: CN
Inventors: 巫正佰
Original assignee: Chongqing Bishan District Baiyou Agricultural Machinery Professional Cooperative Association
Current assignee: Chongqing Bishan District Baiyou Agricultural Machinery Professional Cooperative Association
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-08-02

Abstract

The invention discloses a height-adjustable weed killer, belonging to the technical field of weed killing devices, and comprising: the lawn mower comprises a rack, a first weeding component, a second weeding component, a third weeding component and a handrail component, wherein the first weeding component is arranged and moves towards one side through a pair of sliding blocks to drive the second knife board and the first knife board to move in a staggered mode to achieve the purpose of pruning thicker shrubs, the movable board is driven to slide at the sliding bars through the lifting of the movable end of the pneumatic cylinder to adjust the distance from the ground, the output end of the second motor drives the fourth gear to rotate, the rotating fourth gear drives the third gear which is connected in a meshed mode to rotate, and the rotating third gear drives the circular base to rotate, so that the third knife board conducts weed killing work on the ground to adapt to lawns of different heights to prune, herbicide is sprayed while pruning, and the root of weeds is eliminated.

Description

Convenient height-adjusting's weeder

Technical Field

The invention belongs to the technical field of weed killing, and particularly relates to a weed killing machine with a height convenient to adjust.

Background

Weeds are plants that grow on areas that are harmful to human survival and activity, and are generally non-cultivated wild plants or plants that are not useful to humans. Farmland weeds are understood to mean plants which grow in the field in a manner which is not purposefully cultivated by humans, i.e. all plants except the crops which are intentionally cultivated in the crop field are weeds. Such as wild plants in corn fields, such as barnyard grass, green bristlegrass, purslane, etc.

Farmland weeds directly or indirectly affect agricultural production and affect crop yield, quality and quality. The main pests of farmland weeds are: compete for nutrients, moisture, sunlight and space with crops, prevent ventilation and light transmission in the field, increase local climate temperature, and promote the occurrence of plant diseases and insect pests, wherein some are intermediate hosts of diseases and insects; the parasitic weeds directly absorb nutrients from crops, so that the yield and the quality of the crops are reduced, and the parasitic weeds have strong adaptability and regeneration capacity. In addition, some weed seeds or pollen contain toxins, which can poison people and livestock.

At present, the method for preventing and controlling the weeds in the farmland is mainly manual prevention and control, generally, the weeds are directly pulled out or eradicated manually after the weeds germinate or in the growth period, or the weeds are removed by combining farming measures such as intertillage fertilization and the like, some weeds have vigorous growth force and cover the surface of soil, the manual herbicide spraying only acts on the surfaces of the weeds and cannot directly reach the roots, and the method has the problems of low weeding efficiency, time and labor waste and incomplete weeding.

Disclosure of Invention

The invention aims to provide a weed killer with conveniently adjusted height so as to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

a height-adjustable weed killer, comprising: the frame, first weeding subassembly, second weeding subassembly, third weeding subassembly and handrail subassembly.

The frame, the U-shaped frame is installed to one side of frame, in order to increase the stationarity of device, first supporting wheel is installed to the bilateral symmetry of U-shaped frame, the frame lower surface has seted up first chamber and the second of holding to hold to the inside extension, first drive wheel and second supporting wheel are installed to the bilateral symmetry of frame, and first supporting wheel plays strutting arrangement and keeps steady state with the second supporting wheel, and the first drive wheel of setting passes through power device and drives first supporting wheel and second supporting wheel rotation.

The first weeding assembly is arranged on a connecting edge arranged on the U-shaped frame in order to trim shrubs with thicker branches;

the second weeding assembly is arranged in the second accommodating cavity for trimming weeds with uneven ground to level the grassland;

the third weeding assembly comprises a chemical box which is arranged on the frame for eliminating weeds on the ground;

the handrail assembly, the handrail assembly includes that the symmetry is installed at the set-square of frame both sides, and in order to rotate the handle, convenient to use person angle of adjustment, both sides rotate between the set-square and be connected with the linkage plate, install the handle on the linkage plate perpendicularly.

Preferably, the first weeding assembly comprises a chute frame fixedly arranged on the U-shaped frame, first supporting rods are vertically arranged on two sides of the chute frame, a first knife board is arranged between the first supporting rods on the two sides, and a plurality of first blades are arranged on the first knife board at equal intervals;

wherein, it is equipped with the guide way to run from opposite directions on the inner wall of spout frame, spout frame fit in-sliding has a pair of slider, arbitrary the sliding pin is installed to the both sides of slider, both sides the sliding pin cooperation slides in the guide way, the last surface mounting of slider has the second bracing piece, and is a pair of install the second cutting board between the second bracing piece, the second cutting board is located the top of first cutting board, the equidistance is provided with a plurality of second blades on the second cutting board, first blade sets up with the second blade is crisscross.

Preferably, the middle part of the chute frame is provided with a stop block, and a spring is connected between the slide blocks on two sides of the stop block and the stop block.

Preferably, the first weeding assembly further comprises a first connecting shaft which is rotatably connected in the U-shaped frame, second driving wheels are mounted at two ends of the first connecting shaft, arc-shaped grooves are formed in opposite surfaces of the second driving wheels at equal intervals along the axial direction of the second driving wheels, and the highest point of the arc-shaped groove formed in the second driving wheels at two sides corresponds to the lowest point of the arc-shaped groove at the other side;

and one side of the sliding block, which is close to the rack, is provided with an L-shaped guide rod, and one end of the L-shaped guide rod, which is far away from the sliding block, is abutted against the second driving wheel.

Preferably, a first accommodating cavity in the rack extends towards one side of the U-shaped frame and is provided with a rectangular notch, a second connecting shaft is rotatably connected in the first accommodating cavity, the first driving wheel is installed at two ends of the second connecting shaft, a first belt wheel and a first gear are installed on the second connecting shaft, a second belt wheel is installed on the first connecting shaft, and the first belt wheel and the second belt wheel are in transmission connection through a belt;

the first motor is installed in a first containing cavity in the rack, the second gear is installed at the output end of the first motor, and the first gear is meshed with the second gear.

Preferably, the second weeding assembly comprises slide bars arranged at four corners in the second accommodating cavity, a movable plate is arranged between the slide bars in a sliding manner, a circular base is rotatably arranged on the lower surface of the movable plate through a bearing, a third gear is arranged on the peripheral wall of the circular base, a third blade is arranged on the bottom surface of the circular base, a second motor is arranged on the upper surface of the movable plate, the output end of the second motor penetrates through the movable plate and is provided with a fourth gear, and the third gear is in meshed connection with the fourth gear.

Preferably, the frame is provided with a pneumatic cylinder, and an output end of the pneumatic cylinder penetrates through the frame and is connected with the moving plate.

Preferably, the drug box is provided with a drug inlet hole and a drug inlet pipe matched with the drug inlet hole, a pump body is installed in the drug box, the side wall of the second accommodating cavity is provided with atomizing nozzles in an array mode, and a drug outlet pipe is connected between the atomizing nozzles and the pump body.

Preferably, the third motor is installed on the chemical box, the output end of the third motor penetrates through the chemical box and is provided with the stirring shaft, and the stirring shaft is provided with the blades along the length direction of the stirring shaft.

Preferably, the handle is U-shaped, and a palm pad is mounted on a horizontal section of the handle.

The invention has the beneficial effects that:

1. the movable plate is driven to slide at the slide rod through the lifting of the movable end of the pneumatic cylinder, the distance between the movable plate and the ground is adjusted, the output end of the second motor drives the fourth gear to rotate, the rotating fourth gear drives the third gear which is in meshed connection to rotate, and the rotating third gear drives the circular base to rotate, so that the third blade performs weed killing work on the ground to adapt to lawns of different heights to be trimmed, and herbicide is sprayed while trimming, and the root of weeds is killed.

2. According to the invention, the first motor is arranged to drive the device to move and provide power for the first weeding assembly, so that the energy consumption is reduced.

3. According to the invention, the highest point of the arc-shaped groove arranged on the second driving wheels at two sides corresponds to the lowest point of the arc-shaped groove at the other side, when the L-shaped guide rod at one side is positioned at the highest point on the second driving wheels, the spring at the same side is compressed, and when the L-shaped guide rod at the other side is positioned at the lowest point on the second driving wheels, the spring at the same side pushes the sliding blocks to reset, so that the pair of sliding blocks move towards one side together to drive the second cutting board and the first cutting board to do staggered movement to achieve the purpose of trimming shrubs with thicker branches.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of another embodiment of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 4 is a schematic view of the chute frame of the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 2 according to the present invention;

FIG. 6 is an enlarged view of the structure at C of FIG. 2 according to the present invention;

fig. 7 is a schematic view of the internal structure of the chemical tank of the present invention.

In the figure: 1. a frame; 101. a first accommodating chamber; 102. a second accommodating chamber; 103. a rectangular notch; 2. a U-shaped frame; 3. a first support wheel; 4. a second support wheel; 5. a kit; 6. a set square; 7. a connector tile; 8. a handle; 801. a palm pad; 9. a chute frame; 901. a guide groove; 10. a first support bar; 11. a first blade; 1101. a first blade; 12. a slider; 13. a slide pin; 14. a second support bar; 15. a second cutting board; 1501. a second blade; 16. a stopper; 17. a spring; 18. a first connecting shaft; 19. a second drive wheel; 1901. an arc-shaped slot; 20. an L-shaped guide rod; 21. a second connecting shaft; 22. a first pulley; 23. a second pulley; 24. a first gear; 25. a first motor; 26. a second gear; 27. a slide bar; 28. moving the plate; 29. a circular base; 30. a third gear; 31. a third blade; 32. a second motor; 33. a fourth gear; 34. a pneumatic cylinder; 35. a medicine inlet pipe; 36. a pump body; 37. an atomizing spray head; 38. a medicine outlet pipe; 39. a third motor; 40. a stirring shaft; 41. a paddle; 42. a first drive wheel.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Examples

Referring to fig. 1-2, a height-adjustable weed killer includes: frame 1, first weeding subassembly, second weeding subassembly, third weeding subassembly and handrail subassembly.

Frame 1, U-shaped frame 2 is installed to one side of frame 1, in order to increase the stationarity of device, first supporting wheel 3 is installed to the bilateral symmetry of U-shaped frame 2, frame 1 lower surface has seted up first chamber 101 and the second that holds to hold 102 to extending inwards, first drive wheel 42 and second supporting wheel 4 are installed to the bilateral symmetry of frame 1, first supporting wheel 3 plays strutting arrangement and keeps steady state with second supporting wheel 4, the first drive wheel 42 of setting passes through power device and drives first supporting wheel 3 and second supporting wheel 4 and rotate.

The first weeding component is arranged on a connecting edge arranged on the U-shaped frame 2 in order to trim shrubs with thicker branches;

the second weeding assembly is arranged in the second accommodating cavity 102 for trimming weeds exposed out of the ground and leveling the ground;

the third weeding assembly is used for eliminating weeds on the ground and comprises a chemical box 5, and the chemical box 5 is arranged on the rack 1;

the handrail component comprises triangular plates 6 which are symmetrically arranged on two sides of the frame 1, so that a user can adjust the angle conveniently by rotating the handle 8, a connecting plate 7 is rotatably connected between the triangular plates 6 on the two sides, and the handle 8 is vertically arranged on the connecting plate 7;

wherein, handle 8 is the U-shaped, and palm pad 801 is installed to the horizontal segment that is equipped with on handle 8, and the palm pad 801 of establishing through 8 outer surface sleeves of handle can effectively strengthen the frictional force of handle 8 with the hand, and is more laborsaving during the use.

Specifically, referring to fig. 1-4, in order to cut thick shrubs, the first weeding assembly includes a chute frame 9 fixed on the U-shaped frame 2, the chute frame 9 is arranged to reduce the accumulation of cut weeds, first supporting rods 10 are vertically installed on two sides of the chute frame 9, a first knife board 11 is installed between the first supporting rods 10 on two sides, and a plurality of first blades 1101 are equidistantly arranged on the first knife board 11;

in order to prevent the sliding blocks 12 from sliding off, guide grooves 901 are oppositely formed in the inner wall of the sliding chute frame 9, a pair of sliding blocks 12 is arranged in the sliding chute frame 9 in a matched and sliding mode, sliding pins 13 are arranged on two sides of any sliding block 12, the sliding pins 13 on the two sides are arranged in the guide grooves 901 in a matched and sliding mode, second supporting rods 14 are arranged on the upper surface of the sliding block 12, a second knife board 15 is arranged between the pair of second supporting rods 14, the second knife board 15 is located above the first knife board 11, a plurality of second knife blades 1501 are arranged on the second knife board 15 at equal intervals, and the first knife blades 1101 and the second knife blades 1501 are arranged in a staggered mode.

In application, when the pair of sliding blocks 12 slide to one side in the chute frame 9 at the same time and drive the second knife board 15 to move through the second supporting rod 14, the second knife board 15 and the first knife board 11 are staggered with each other, so as to achieve the purpose of trimming.

Specifically, referring to fig. 3, in order to automatically return the pair of sliders 12, a stopper 16 is installed in the middle of the chute frame 9, and a spring 17 is connected between the sliders 12 and the stopper 16 on both sides of the stopper 16.

Specifically, referring to fig. 1-2, in order to drive the pair of sliders 12 to move to one side, the first weeding assembly further includes a first connecting shaft 18 rotatably connected in the U-shaped frame 2, the two ends of the first connecting shaft 18 are provided with second driving wheels 19, the opposite surface of the second driving wheels 19 is provided with arc-shaped grooves 1901 at equal intervals along the axial direction thereof, the arc-shaped grooves 1901 are fan-shaped, the interval between the adjacent arc-shaped grooves 1901 is the highest point of the second driving wheels 19, and the highest point of the arc-shaped groove 1901 on the second driving wheels 19 at the two sides corresponds to the lowest point of the arc-shaped groove 1901 at the other side;

wherein, one side of the slider 12 close to the frame 1 is provided with an L-shaped guide rod 20, and one end of the L-shaped guide rod 20 far away from the slider 12 is abutted against the second driving wheel 19.

In application, when the second driving wheels 19 on both sides rotate, because the highest point of the arc-shaped grooves 1901 on the second driving wheels 19 on both sides corresponds to the lowest point of the arc-shaped groove 1901 on the other side, when the L-shaped guide rod 20 on one side is located at the highest point on the second driving wheels 19, the spring 17 on the same side is compressed, and when the L-shaped guide rod 20 on the other side is located at the lowest point on the second driving wheels 19, the spring 17 on the same side pushes the sliding block 12 to reset, so that the pair of sliding blocks 12 move together to one side to drive the staggered movement between the second knife board 15 and the first knife board 11.

Specifically, referring to fig. 5, in order to drive the pair of second driving wheels 19 to rotate and drive the device to move integrally, a first accommodating cavity 101 on the frame 1 extends towards one side of the U-shaped frame 2 to form a rectangular notch 103, the first accommodating cavity 101 is rotatably connected with a second connecting shaft 21, the first driving wheels 42 are installed at two ends of the second connecting shaft 21, the second connecting shaft 21 is provided with a first belt wheel 22 and a first gear 24, the first connecting shaft 18 is provided with a second belt wheel 23, and the first belt wheel 22 is in transmission connection with the second belt wheel 23 through a belt;

wherein, install first motor 25 in the first chamber 101 that holds on frame 1, the output of first motor 25 is installed second gear 26, and first gear 24 is connected with second gear 26 meshing.

In application, the output end of the first motor 25 drives the second gear 26 to rotate, the rotating second gear 26 drives the first gear 24 in meshed connection to rotate, the rotating first gear 24 drives the coaxial first belt wheel 22 to rotate, the rotating first belt wheel 22 drives the second belt wheel 23 to rotate through a belt, and the rotating second belt wheel 23 provides power for the rotation of the coaxial second driving wheel 19.

Specifically, referring to fig. 6, in order to adapt to trimming of weeds with different heights, the second weeding assembly includes slide bars 27 installed at four corners in the second accommodating cavity 102, moving plates 28 are installed between the slide bars 27 in a sliding manner, a circular base 29 is installed on the lower surface of the moving plate 28 through a bearing in a rotating manner, a third gear 30 is installed on the circumferential wall of the circular base 29, a third blade 31 is installed on the bottom surface of the circular base 29, a second motor 32 is installed on the upper surface of the moving plate 28, an output end of the second motor 32 penetrates through the moving plate 28 and is installed with a fourth gear 33, and the third gear 30 is meshed with the fourth gear 33.

Wherein, a pneumatic cylinder 34 is arranged on the frame 1, and the output end of the pneumatic cylinder 34 penetrates through the frame 1 and is connected with the moving plate 28.

In application, the movable plate 28 is driven to slide at the slide bar 27 by the lifting of the movable end of the pneumatic cylinder 34 to adjust the distance to the ground, the output end of the second motor 32 drives the fourth gear 33 to rotate, the rotating fourth gear 33 drives the third gear 30 in meshed connection to rotate, and the rotating third gear 30 drives the circular base 29 to rotate, so that the third blade 31 trims weeds growing in the soil to expose the soil.

Specifically, referring to fig. 6-7, in order to further perform weeding, a chemical inlet hole and a chemical inlet pipe 35 matched with the chemical inlet hole are arranged on the chemical tank 5, a pump body 36 is installed in the chemical tank 5, atomizing nozzles 37 are installed on the side wall of the second accommodating cavity 102 in an array manner, and a chemical outlet pipe 38 is connected between the atomizing nozzles 37 and the pump body 36.

Specifically, referring to fig. 7, a third motor 39 is installed on the chemical tank 5, an output end of the third motor 39 penetrates through the chemical tank 5 and is installed with a stirring shaft 40, and blades 41 are installed on the stirring shaft 40 along the length direction thereof.

In application, the output end of the third motor 39 drives the stirring shaft 40 to rotate, so as to uniformly stir the concentration of the herbicide in the chemical box 5, and the pump body 36 sprays the herbicide through the atomizing nozzle 37 to be blended into soil, so as to eliminate the root of weeds.

The working principle is as follows:

when grass is killed, the output end of the first motor 25 drives the second gear 26 to rotate, the rotating second gear 26 drives the first gear 24 in meshed connection to rotate, the rotating first gear 24 drives the coaxial first belt wheel 22 to rotate, the rotating first belt wheel 22 drives the second belt wheel 23 to rotate through a belt, the rotating second belt wheel 23 drives the coaxial second driving wheel 19 to rotate, as the highest point of the arc-shaped groove 1901 arranged on the second driving wheel 19 at two sides corresponds to the lowest point of the arc-shaped groove 1901 at the other side, when the L-shaped guide rod 20 at one side is positioned at the highest point on the second driving wheel 19, the spring 17 at the same side is compressed, and when the L-shaped guide rod 20 at the other side is positioned at the lowest point on the second driving wheel 19, the spring 17 at the same side pushes the slider 12 to reset 1901, so that the pair of sliders 12 moves towards one side together to drive the staggered movement between the second knife board 15 and the first knife board 11 to achieve the purpose of pruning thicker shrubs, the output of second motor 32 drives fourth gear 33 and rotates, and pivoted fourth gear 33 drives the third gear 30 rotation that the meshing is connected, and pivoted third gear 30 drives circular base 29 rotatory, makes third blade 31 carry out the work of weeding to ground, and the output of third motor 39 drives (mixing) shaft 40 and rotates, stirs the herbicide concentration in the chemical tank 5 evenly, and pump body 36 passes through atomizer 37 blowout with the herbicide for eliminate the weeds root.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A convenient height-adjusting's weeder, its characterized in that includes:

the device comprises a rack (1), wherein a U-shaped frame (2) is installed on one side of the rack (1), first supporting wheels (3) are symmetrically installed on two sides of the U-shaped frame (2), a first accommodating cavity (101) and a second accommodating cavity (102) are formed in the lower surface of the rack (1) in an inward extending mode, and first driving wheels (42) and second supporting wheels (4) are symmetrically installed on two sides of the rack (1);

the first weeding assembly is arranged on a connecting edge arranged on the U-shaped frame (2);

a second herbicidal assembly disposed within a second containment chamber (102);

a third herbicidal assembly comprising a chemical tank (5), the chemical tank (5) being mounted on the frame (1);

the handrail assembly, the handrail assembly is including triangle-shaped board (6) of symmetry installation in frame (1) both sides, both sides it is connected with linkage plate (7) to rotate between triangle-shaped board (6), install handle (8) perpendicularly on linkage plate (7).

2. The weed killer of claim 1, wherein the height of the grass-killing machine is adjustable: the first weeding assembly comprises a chute frame (9) fixedly arranged on a U-shaped frame (2), first supporting rods (10) are vertically arranged on two sides of the chute frame (9), a first knife board (11) is arranged between the first supporting rods (10) on the two sides, and a plurality of first blades (1101) are equidistantly arranged on the first knife board (11);

the inner wall of the sliding chute frame (9) is provided with guide grooves (901) in a split mode, the sliding chute frame (9) is internally provided with a pair of sliding blocks (12) in a matched mode, sliding pins (13) are installed on two sides of any sliding block (12), the sliding pins (13) on two sides slide in the guide grooves (901) in a matched mode, a second supporting rod (14) is installed on the upper surface of the sliding block (12), a second knife board (15) is installed between the second supporting rod (14) in a pair, the second knife board (15) is located above the first knife board (11), the second knife board (15) is equidistantly provided with a plurality of second blades (1501), and the first blades (1101) and the second blades (1501) are arranged in a staggered mode.

3. The height-adjustable weed killer as claimed in claim 2, wherein: a stop block (16) is installed in the middle of the sliding chute frame (9), and springs (17) are connected between the sliding blocks (12) on the two sides of the stop block (16) and the stop block (16).

4. The height-adjustable weed killer as claimed in claim 2, wherein: the first weeding assembly further comprises a first connecting shaft (18) rotatably connected in the U-shaped frame (2), second driving wheels (19) are mounted at two ends of the first connecting shaft (18), arc-shaped grooves (1901) are formed in opposite surfaces of the second driving wheels (19) at equal intervals along the axial direction of the second weeding assembly, and the highest point of the arc-shaped groove (1901) formed in the second driving wheels (19) on two sides corresponds to the lowest point of the arc-shaped groove (1901) on the other side;

an L-shaped guide rod (20) is installed on one side, close to the rack (1), of the sliding block (12), and one end, far away from the sliding block (12), of the L-shaped guide rod (20) abuts against the second driving wheel (19).

5. The weeder of claim 4, wherein the height of the weeder is adjustable by: a first accommodating cavity (101) in the rack (1) extends towards one side of the U-shaped frame (2) to form a rectangular notch (103), a second connecting shaft (21) is connected in the first accommodating cavity (101) in a rotating mode, a first driving wheel (42) is installed at two ends of the second connecting shaft (21), a first belt wheel (22) and a first gear (24) are installed on the second connecting shaft (21), a second belt wheel (23) is installed on the first connecting shaft (18), and the first belt wheel (22) is in transmission connection with the second belt wheel (23) through a belt;

wherein, install first motor (25) in the first chamber (101) that holds on frame (1), second gear (26) are installed to the output of first motor (25), first gear (24) are connected with second gear (26) meshing.

6. The weed killer of claim 1, wherein the height of the grass-killing machine is adjustable: the second weeding subassembly is including installing slide bar (27) at four corners in second accommodation chamber (102), common slidable mounting has movable plate (28) between slide bar (27), circular base (29) are installed through the bearing rotation to movable plate (28) lower surface, install third gear (30) on the perisporium of circular base (29), third blade (31) are installed to the bottom surface of circular base (29), surface mounting has second motor (32) on movable plate (28), the output of second motor (32) runs through movable plate (28) and installs fourth gear (33), third gear (30) are connected with fourth gear (33) meshing.

7. The weeder of claim 6, wherein the height of the weeder is adjustable by: the pneumatic cylinder (34) is installed on the frame (1), and the output end of the pneumatic cylinder (34) penetrates through the frame (1) and is connected with the moving plate (28).

8. The weed killer of claim 1, wherein the height of the grass-killing machine is adjustable: be provided with into medicine hole and with this advance medicine hole adaptation on medicament case (5) advance pencil (35), install pump body (36) in medicament case (5), atomizer (37) are installed to the array on the lateral wall that the second held chamber (102), be connected with out pencil (38) between atomizer (37) and the pump body (36).

9. The height-adjustable weed killer as claimed in claim 8, wherein: install third motor (39) on medicine case (5), the output of third motor (39) runs through medicine case (5) and installs (mixing) shaft (40), install paddle (41) along self length direction on (mixing) shaft (40).

10. The weed killer of claim 1, wherein the height of the grass-killing machine is adjustable: the handle (8) is U-shaped, and a palm pad (801) is installed at the horizontal section of the handle (8).