CN218302281U

CN218302281U - Formula of tailorring along edge has safeguard function's plant lawn mower

Info

Publication number: CN218302281U
Application number: CN202222817910.1U
Authority: CN
Inventors: 林亚萍
Original assignee: Suzhou Xiaolin Agricultural Technology Development Co ltd
Current assignee: Suzhou Xiaolin Agricultural Technology Development Co ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2023-01-17
Anticipated expiration: 2032-10-25

Abstract

The utility model relates to a plant lawn mower, specifically speaking relates to a formula of tailorring at border has safeguard function's plant lawn mower. It includes the handheld piece and sets up the cutting member on the handheld piece, the handheld piece includes the holding rod, the one end of holding rod is provided with the driving piece, the cutting member is at least including main cutting knife, movable chamber has been seted up in the main cutting knife, the intracavity that moves about slides and is provided with the inferior cutting knife, and during the formula had safeguard function's plant mower was tailor at this border, the position of inferior cutting knife was adjusted through the pivoted blade disc, made the inferior cutting knife after adjusting can not only avoid utilizing pivoted air current when contacting with the barrier, made the air current drive the flabellum and rotated, made the dust at blade disc top sucked the bottom, avoided people to absorb more dust.

Description

Formula of tailorring along edge has safeguard function's plant lawn mower

Technical Field

The utility model relates to a plant lawn mower, specifically speaking relates to a formula of tailorring at border has safeguard function's plant lawn mower.

Background

Lawn mowers cut grass with a cutting blade rotating at high speed, and there are two types of common lawn mowers, a push type lawn mower and a handheld lawn mower.

Compare the lawn mower of promotion formula, hand-held type lawn mower is nimble changeable more at the during operation, can realize getting regional quick cutting to some littlenesses. At the in-process of mowing, the sight of people can be influenced in some places with more weeds, and the cutting knife can be damaged due to collision of the cutting knife rotating at a high speed and obstacles (stones, bricks and the like) on the ground, which cannot be found by people in time.

And the weeds can generate more dust in the cutting process, and the dust is easy to cause harm to the bodies of people when scattered in the air.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a formula plant lawn mower is cut to border has safeguard function to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, there is provided a plant mower with edge cutting and cutting functions, comprising a hand piece and a cutting piece arranged on the hand piece, wherein the hand piece comprises a holding rod, one end of the holding rod is provided with a driving piece, and the cutting piece at least comprises:

the device comprises a main cutting knife, wherein a movable cavity is formed in the main cutting knife, a secondary cutting knife is arranged in the movable cavity in a sliding manner, a guide piece is arranged at the top of the secondary cutting knife, a buffer piece is arranged at one end, away from the main cutting knife, of the secondary cutting knife, the buffer piece drives the secondary cutting knife to slide into the movable cavity by utilizing an acting force generated by contact with a barrier, an exhaust passage communicated with the movable cavity is formed at one end, away from the buffer piece, of the main cutting knife, a through groove is formed in the bottom of the main cutting knife in a penetrating manner, a bearing plate is hinged to one end in the through groove, a limiting piece is arranged at the bottom of the bearing plate, and when the secondary cutting knife slides to the top of the bearing plate, the secondary cutting knife drives the bearing plate to rotate by utilizing gravity, so that the secondary cutting knife is in an inclined state, and is matched with the limiting piece to open the through groove;

the air guide device comprises a cutter disc, wherein the cutter disc is fixedly arranged at one end, close to the exhaust passage, of the main cutting knife, the cutter disc rotates under the action of a driving piece to guide air flow into an air guide cavity through an inclined secondary cutting knife, an air guide cavity communicated with the exhaust passage is formed in the cutter disc, a through hole is formed in the top of the cutter disc in a penetrating mode, fan blades are arranged in the through hole, and the air flow in the main cutting knife drives the fan blades to rotate so as to suck gas around the cutter disc.

As a further improvement of the technical scheme, the guide piece comprises a plurality of convex rods, the convex rods are fixedly arranged at the top of the secondary cutting knife, a groove is formed in the inner wall of the top of the primary cutting knife, one end of the groove bends towards the bearing plate, and the convex rods are arranged in the groove in a sliding mode.

As a further improvement of the technical scheme, the buffer piece comprises a connecting block, one end of the connecting block is fixedly connected with one end of the secondary cutting knife, one end of the connecting block, away from the secondary cutting knife, is of a semicircular structure, and a plurality of rollers are arranged on the side wall of the connecting block in a rotating mode.

As a further improvement of the technical scheme, the limiting member comprises a supporting plate, the supporting plate is fixedly arranged on the outer wall of the bottom of the main cutting knife, the supporting plate is located below one end of the through groove, one end of the supporting plate, which is close to the middle of the through groove, is bent downwards, and a compression spring which elastically connects the bending end of the supporting plate and the bottom of the bearing plate is arranged between the bending end of the supporting plate and the bottom of the bearing plate.

As a further improvement of the technical scheme, the bottom of the bearing plate is fixedly provided with a guide block, and two opposite sides of the guide block are obliquely arranged.

As a further improvement of the technical scheme, the one end that the backup pad was kept away from to the loading board bottom articulates there is the filter screen, the one end of filter screen articulates there is the slider, the slider slides and sets up in main cutting knife bottom.

As a further improvement of the technical scheme, a fixed pipe is arranged in the air guide cavity and communicated with the through hole, an air guide pipe is arranged on the inner wall of the fixed pipe, and one end of the air guide pipe is bent downwards.

As a further improvement of the technical scheme, a filter plate is fixedly arranged at the top of the cutter head and used for blocking dust.

As a further improvement of the technical scheme, a telescopic rod is arranged on one side of the driving piece, a protective cover is fixedly arranged at one end of the telescopic rod and is positioned on the outer ring of the main cutting knife, and a reset spring is sleeved on the outer ring of the telescopic rod.

As a further improvement of the technical scheme, a through groove communicated with the air guide cavity is formed in the top of the cutter head, the through groove is of an annular structure, a rotating plate is rotatably arranged in the through groove, the top of the rotating plate is communicated with a connecting pipe, and an exhaust hole communicated with the connecting pipe is formed in the holding rod.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in the plant mower with the protection function in the edge cutting mode, the position of the secondary cutting knife is adjusted through the rotating cutter head, so that the adjusted secondary cutting knife can not only avoid contacting with a barrier but also utilize the rotating air flow, the air flow drives the fan blades to rotate, the dust at the top of the cutter head is sucked into the bottom, and more dust is prevented from being absorbed by people.

2. In this formula of cutting out and cutting plant lawn mower that has safeguard function along this border, the protection casing that sets up can also block the weeds of cutting, makes weeds can not get rid of people on one's body, and when the lateral wall contact of bolster and protection casing, the bolster under the rotation state can be scraped the attachment of protection casing lateral wall down to in the realization is to the cleanness of protection casing lateral wall.

3. In the plant mower with the edge cutting type protection function, gas in the movable cavity enters the exhaust hole through the connecting pipe and is exhausted to the position near people through the exhaust hole, so that the flow rate of the gas around the people is increased, the temperature around the people is reduced, and the working comfort of the people is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the hand piece of the present invention;

FIG. 3 is a schematic view of the structure of the cutting member of the present invention;

fig. 4 is one of the schematic sectional structural views of the main cutting knife of the present invention;

fig. 5 is a second schematic structural view of the main cutting knife of the present invention;

FIG. 6 is a schematic cross-sectional view of the main cutting knife of the present invention;

fig. 7 is a schematic view of the cutter head structure of the present invention;

fig. 8 is a schematic cross-sectional view of the cutter head profile structure of the present invention;

fig. 9 is a schematic view of the connecting pipe structure of the present invention;

fig. 10 is a schematic view of the gas flow direction in the working state of the secondary cutting knife of the present invention;

fig. 11 is a schematic view illustrating the flow direction of the air in the working state of the fan blades according to the present invention.

The various reference numbers in the figures mean:

100. a handpiece;

110. a holding rod; 111. a connecting cover; 112. a drive member;

120. a telescopic rod; 121. a protective cover; 122. a return spring;

130. an exhaust hole;

200. cutting the piece;

210. a main cutter; 211. a movable cavity; 212. a secondary cutter; 213. a buffer member; 214. an exhaust passage; 215. a through groove; 216. a carrier plate;

220. a cutter head; 221. a wind guide cavity; 222. a port; 223. a fan blade; 224. an air guide pipe; 225. a filter plate;

230. a nose bar; 231. a groove; 232. a roller;

240. a support plate; 241. a compression spring; 242. a guide block; 243. filtering with a screen;

250. penetrating a groove; 251. rotating the plate; 252. and (4) connecting the pipes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In a first embodiment, referring to fig. 1-8, there is provided a lawn mower with a protection function along a cutting blade, comprising a handheld device 100 and a cutting device 200 disposed on the handheld device 100, the handheld device 100 includes a handle 110, a driving device 112 is disposed at one end of the handle 110, specifically, a connecting cover 111 is fixedly disposed at one end of the handle 110, the driving device 112 is disposed in the connecting cover 111, the driving device 112 preferably employs a motor to drive the cutter head 220, the cutting device 200 includes a primary cutter 210, a movable cavity 211 is disposed in the primary cutter 210, a secondary cutter 212 is slidably disposed in the movable cavity 211, a guiding member is disposed at a top of the secondary cutter 212, a sliding position of the secondary cutter 212 in the movable cavity 211 is limited by the guiding member, a cutter 213 is disposed at one end of the secondary cutter 212 far from the primary cutter 210, the secondary cutter 213 is disposed at one end of the secondary cutter 213 far from the primary cutter 210, the secondary cutter 212 drives the secondary cutter 212 to slide in the movable cavity 211 by an action force generated by contact with an obstacle, so as to drive the secondary cutter 212 to slide in the movable cavity 211, so as to prevent the secondary cutter 212 from contacting with the secondary cutter, in order to reduce dust generated in the cutting process, the dust generated by the primary cutter 210, an air flow from the secondary cutter is guided by a through slot 215 connected to an air duct 215 connected to an output shaft 215, a rotating air duct 215, a rotating air outlet 215 connected to an air outlet shaft 215 connected to the motor, a secondary cutter 220 fixed in the motor, a rotating air duct 215 connected to an air duct 215 connected to the secondary cutter 220, and a motor, a secondary cutter 220 fixed in the secondary cutter 220, the air guide cavity 221 communicated with the air exhaust channel 214 is formed in the cutter head 220, so that air in the air exhaust channel 214 can flow into the air guide cavity 221, the top of the cutter head 220 is provided with a through opening 222, fan blades 223 are arranged in the through opening 222, the fan blades 223 are driven to rotate by air flow in the main cutting knife 210, so that air around the cutter head 220 can be sucked, the position of the secondary cutting knife 212 is adjusted by the rotating cutter head 220, the adjusted secondary cutting knife 212 can not only avoid contacting with obstacles, but also utilize rotating air flow, the air flow drives the fan blades 223 to rotate, under the action of wind power generated by rotation of the fan blades 223, dust at the top of the cutter head 220 is sucked to the bottom, and people are prevented from absorbing more dust.

When using, the output shaft of motor passes through blade disc 220 and drives main cutting knife 210 and time cutting knife 212 and rotate, and time cutting knife 212 begins to remove to the one end that main cutting knife 210 kept away from blade disc 220 by centrifugal force's influence for time cutting knife 212 can cut great scope, when time cutting knife 212 the place ahead has the barrier, bolster 213 utilizes the effort that produces with the barrier contact to drive time cutting knife 212 and slides to activity chamber 211, thereby has avoided time cutting knife 212 and barrier contact. When dust is more around, with bolster 213 and barrier or wall contact, secondary cutting knife 212 slides to in the activity chamber 211, then receive the effect of centrifugal force to make secondary cutting knife 212 slide to the top of loading board 216 through the guide, secondary cutting knife 212 utilizes gravity to drive loading board 216 and rotates, so that secondary cutting knife 212 is in the tilt state, logical groove 215 has just been opened a osculum, as shown in fig. 10, high-speed pivoted main cutting knife 210 makes gaseous pour into the activity chamber 211 through this osculum, and bolster 213 is located the one end of main cutting knife 210, make gaseous accessible exhaust passage 214 enter into in the wind-guiding chamber 221, then discharge through opening 222, and drive the flabellum 223 rotation that sets up in opening 222, flabellum 223 rotates just to inhale the dust at top.

It should be noted that, the guiding member includes a plurality of protruding rods 230, the protruding rods 230 are fixedly disposed at the top of the secondary cutting knife 212, a groove 231 is disposed on the inner wall of the top of the primary cutting knife 210, one end of the groove 231 bends toward the bearing plate 216, so as to guide the secondary cutting knife 212 to the top of the bearing plate 216, the protruding rods 230 are slidably disposed in the groove 231, when the primary cutting knife 210 is located in the primary cutting knife 210, the buffer member 213 is attached to one end of the primary cutting knife 210, and starts to slide under the action of centrifugal force, at this time, the secondary cutting knife 212 is limited, so that the secondary cutting knife 212 cannot slide toward the buffer member 213, and then the centrifugal force can make the secondary cutting knife 212 slide toward the bent end of the groove 231.

Fig. 4 shows the buffer member 213, the buffer member 213 includes a connecting block, one end of the connecting block and one end fixed connection of the secondary cutting knife 212, one end semicircular structure of the secondary cutting knife 212 is kept away from by the connecting block, the side wall of the connecting block is rotated and provided with a plurality of rollers 232, so as to reduce the friction force generated between the buffer member 213 and the obstacle, when the buffer member 213 contacts with the obstacle, the semicircle of the side wall of the buffer member 213 can reduce the force colliding with the obstacle, and the secondary cutting knife 212 can be pushed through the circular radian while the collision is buffered to some extent.

Fig. 6 shows a limiting member, the limiting member includes a supporting plate 240, the supporting plate 240 is fixedly disposed on the outer wall of the bottom of the main cutting blade 210, the supporting plate 240 is located below one end of the through slot 215, one end of the supporting plate 240 near the middle of the through slot 215 bends downward, a compression spring 241 elastically connecting the bent end of the supporting plate 240 and the bottom of the bearing plate 216 is disposed between the bent end of the supporting plate 240 and the bottom of the bearing plate 216, when the bearing plate 216 starts to rotate by the gravity of the sub cutting blade 212, the compression spring 241 is stressed and compressed, when the sub cutting blade 212 opens the through slot 215 to a small opening, the compression stroke of the compression spring 241 reaches a limit, the position cannot be adjusted continuously, it should be noted that the centrifugal force generated by the rotation of the main cutting blade 210 pushes the sub cutting blade 212 to the supporting plate 240, which means that the sub cutting blade 212 cannot drop due to inclination.

Specifically, consider because the reason of secondary cutting knife 212 gravity, just can't reset after loading board 216 slopes, for this reason, the fixed guide block 242 that is provided with in bottom of loading board 216, the relative both sides of guide block 242 all are the slope setting, make guide block 242 form an isosceles triangle, when needs reset secondary cutting knife 212, the output shaft of control motor, make its reversal, the air current strikes the inclined plane of guide block 242 this moment, this impact force can carry out the top to loading board 216, and the resilience of compression spring 241 is being coordinated, thereby reset secondary cutting knife 212 to in the activity chamber 211.

In addition, considering that part of the chips can enter the movable cavity 211 through a small opening between the through groove 215 and the secondary cutting knife 212 in the cutting process, the movable cavity 211 becomes dirty, and the resetting of the secondary cutting knife 212 is influenced, for this reason, one end, far away from the supporting plate 240, of the bottom of the bearing plate 216 is hinged with a filter screen 243, one end of the filter screen 243 is hinged with a sliding block, the sliding block is arranged at the bottom of the primary cutting knife 210 in a sliding manner, one inclined end of the bearing plate 216 drives one end of the guide block 242, the other end of the guide block 242 slides towards the bearing plate 216 and rotates, and the filter screen 243 is positioned in front of the small opening between the through groove 215 and the secondary cutting knife 212, so that the chips are prevented from entering the movable cavity 211.

Further, in order to improve the blowing efficiency of the air in the movable cavity 211 to the fan blades 223, a fixed pipe is arranged in the air guide cavity 221, the fixed pipe is communicated with the through hole 222, an air guide pipe 224 is arranged on the inner wall of the fixed pipe, one end of the air guide pipe 224 is bent downward, as shown in fig. 11, the air in the air guide cavity 221 enters the air guide pipe 224, the air is discharged downward to the fan blades 223 through the guide of the bent end of the air guide pipe 224, and the fan blades 223 are forced to rotate so as to suck the air and dust on the top of the cutter head 220 through the through hole 222.

Still further, in order to collect the dust, a filter plate 225 is fixedly disposed on the top of the cutter head 220, and the filter plate 225 is used for blocking the dust.

A second embodiment, which is implemented on the basis of the first embodiment, in consideration of the fact that the position of the secondary cutting knife 212 needs to be adjusted when dust needs to be sucked, and the adjustment of the secondary cutting knife 212 needs to be assisted by other objects such as a wall or an obstacle, so as to facilitate the operation of people, for this reason, as shown in fig. 2, a return spring 122 is fixedly disposed on a side wall of the connecting cover 111, a protection cover 121 is fixedly disposed at one end of the telescopic rod 120, the protection cover 121 is located at an outer ring of the primary cutting knife 210, the outer ring of the telescopic rod 120 is sleeved with the return spring 122, when the secondary cutting knife 212 needs to slide in the movable cavity 211, the protection cover 121 is pushed, and the side wall of the protection cover 121 contacts with the buffer member 213, so that the movable cavity 211 is formed when the secondary cutting knife 212 slides, and meanwhile, the protection cover 121 can block cut weeds, so that the weeds cannot be thrown onto people, and when the buffer member 213 contacts with the side wall of the protection cover 121, the buffer member 213 can scrape off attachments (such as weeds 121, dust, and so as to facilitate the cleaning of the side wall of the buffer member 121.

A third embodiment is implemented on the basis of the first embodiment, and considering that when the work is performed in a hot weather, the fatigue speed of people is increased, for this reason, please refer to fig. 2 and 9, a through groove 250 communicated with the air guiding cavity 221 is formed in the top of the cutter head 220, the through groove 250 is in an annular structure, so that the rotation of the cutter head 220 is not affected by the rotating plate 251, the rotating plate 251 is rotatably disposed in the through groove 250, the top of the rotating plate 251 is communicated with a connecting pipe 252, an air exhaust hole 130 communicated with the connecting pipe 252 is formed in the grip 110, air in the movable cavity 211 enters the air exhaust hole 130 through the connecting pipe 252 and is exhausted to the vicinity of people through the air exhaust hole 130, so that the flow rate of air around people is increased, the temperature around people is reduced, and the work comfort of people is improved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An edge cutting type vegetation mower with a protection function comprises a handheld piece (100) and a cutting piece (200) arranged on the handheld piece (100), wherein the handheld piece (100) comprises a holding rod (110), one end of the holding rod (110) is provided with a driving piece (112), and the edge cutting type vegetation mower is characterized in that: the cutting element (200) comprises at least:

the cutting device comprises a main cutting knife (210), wherein a movable cavity (211) is formed in the main cutting knife (210), a secondary cutting knife (212) is arranged in the movable cavity (211) in a sliding mode, a guide part is arranged at the top of the secondary cutting knife (212), a buffer part (213) is arranged at one end, far away from the main cutting knife (210), of the secondary cutting knife (212), the buffer part (213) drives the secondary cutting knife (212) to slide in the movable cavity (211) by utilizing action force generated by contact with an obstacle, an exhaust passage (214) communicated with the movable cavity (211) is formed at one end, far away from the buffer part (213), of the main cutting knife (210), a through groove (215) is formed in the bottom of the main cutting knife (210) in a penetrating mode, a bearing plate (216) is hinged to one end in the through groove (215), a limiting part is arranged at the bottom of the bearing plate (216), and when the secondary cutting knife (212) slides to the top of the bearing plate (216), the secondary cutting knife (212) drives the bearing plate (216) to rotate by utilizing gravity, so that the secondary cutting knife (212) is in an inclined state and is matched with the limiting part to open the through groove (215);

blade disc (220), fixed the setting in blade disc (220) is close to the one end of exhaust passage (214) at main cutting knife (210), blade disc (220) rotate under the effect of driving piece (112) to guide the air current to in wind-guiding chamber (221) through the inferior cutting knife (212) of slope, set up wind-guiding chamber (221) that are linked together with exhaust passage (214) in blade disc (220), blade disc (220) top has been seted up and has been run through opening (222), be provided with flabellum (223) in opening (222), utilize air current in main cutting knife (210) drives flabellum (223) and rotates to inhale the gas around blade disc (220).

2. The edge scissor-type guard-equipped plant mower of claim 1, wherein: the guide piece comprises a plurality of protruding rods (230), the protruding rods (230) are fixedly arranged at the top of the secondary cutting knife (212), a groove (231) is formed in the inner wall of the top of the main cutting knife (210), one end of the groove (231) bends towards the bearing plate (216), and the protruding rods (230) are arranged in the groove (231) in a sliding mode.

3. The edge-trimmer-type guard-action plant mower of claim 1, wherein: bolster (213) include the connecting block, the one end of connecting block and the one end fixed connection of inferior cutting knife (212), the one end semicircular structure that inferior cutting knife (212) were kept away from to the connecting block, the lateral wall of connecting block rotates and is provided with a plurality of rollers (232).

4. The edge-trimmer-type guard-action plant mower of claim 1, wherein: the limiting piece comprises a supporting plate (240), the supporting plate (240) is fixedly arranged on the outer wall of the bottom of the main cutting knife (210), the supporting plate (240) is located below one end of the through groove (215), one end, close to the middle of the through groove (215), of the supporting plate (240) bends downwards, and a compression spring (241) which elastically connects the bending end of the supporting plate (240) and the bottom of the bearing plate (216) is arranged between the bending end of the supporting plate (240) and the bottom of the bearing plate.

5. The edge scissor-type guard-equipped plant mower of claim 1, wherein: the bottom of the bearing plate (216) is fixedly provided with a guide block (242), and two opposite sides of the guide block (242) are obliquely arranged.

6. The edge-trimmer-type guard-action plant mower of claim 1, wherein: one end, far away from the supporting plate (240), of the bottom of the bearing plate (216) is hinged with a filter screen (243), one end of the filter screen (243) is hinged with a sliding block, and the sliding block is arranged at the bottom of the main cutting knife (210) in a sliding mode.

7. The edge scissor-type guard-equipped plant mower of claim 1, wherein: a fixed pipe is arranged in the air guide cavity (221), the fixed pipe is communicated with the through hole (222), an air guide pipe (224) is arranged on the inner wall of the fixed pipe, and one end of the air guide pipe (224) is bent downwards.

8. The edge scissor guard plant mower of claim 7, wherein: the top of blade disc (220) is fixed and is provided with filter (225), filter (225) are used for blockking the dust.

9. The edge scissor-type guard-equipped plant mower of claim 1, wherein: one side of the driving piece (112) is provided with a telescopic rod (120), one end of the telescopic rod (120) is fixedly provided with a protective cover (121), the protective cover (121) is located on the outer ring of the main cutting knife (210), and the outer ring of the telescopic rod (120) is sleeved with a return spring (122).

10. The edge scissor-type guard-equipped plant mower of claim 1, wherein: the top of the cutter head (220) is provided with a through groove (250) communicated with the air guide cavity (221), the through groove (250) is of an annular structure, a rotating plate (251) is rotatably arranged in the through groove (250), the top of the rotating plate (251) is communicated with a connecting pipe (252), and an exhaust hole (130) communicated with the connecting pipe (252) is formed in the holding rod (110).