CN111819987B

CN111819987B - Mower

Info

Publication number: CN111819987B
Application number: CN201910312144.3A
Authority: CN
Inventors: 山冈敏成; 杨戬
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2019-04-18
Filing date: 2019-04-18
Publication date: 2023-05-12
Anticipated expiration: 2039-04-18
Also published as: CN111819987A

Abstract

The invention discloses a mower, which comprises: a cutting blade that performs a cutting function when rotated about a first axis; a chassis formed with a cutting space covering the cutting blade; the chassis includes: a vortex portion extending in a circumferential direction around the first axis to form a vortex in the cutting space; a guide portion provided in a flow path of the vortex to guide the vortex to flow out substantially in a tangential direction of the vortex; a stopper portion for preventing at least part of the vortex from continuing to circulate in the vortex portion when flowing through the guide portion so as to increase the flow rate of the vortex flowing out of the guide portion; wherein at least a portion of the lead-out and at least a portion of the stop are on the same side of a first plane passing through the first axis. The grass discharging efficiency of the grass cutter is high and the grass cutting capability is good.

Description

Mower

Technical Field

The invention relates to a lawn maintenance tool, in particular to a mower.

Background

The mower can be used as a garden tool for users to remove weeds, cut lawns and the like. Mowers generally include: the mower comprises an operating device, a main machine and a connecting rod for connecting the operating device and the main machine, wherein the connecting rod comprises an armrest, so that the mower can be used as a hand-push type power tool.

For the traditional mower, a plurality of power wires are arranged between an operating device and a host, the power wires are connected with a battery pack and the operating device, and the power wires are connected with the operating device and a motor. The circuit system is high in cost, complex in winding displacement, high in power loss, poor in stability and inconvenient to maintain.

In addition, a lighting device is usually provided on a main unit of the conventional mower. With existing lawnmowers, the user is often required to walk to the side of the mower to activate the lighting device, which is inconvenient to operate.

The host of the mower also comprises a chassis, and the chassis downwards forms a vortex channel. For the existing chassis, when the airflow flows to the outlet in the vortex channel, a part of the airflow cannot directly flow out of the outlet but is repeatedly circulated in the vortex channel, so that the grass clippings are low in discharging efficiency.

Disclosure of Invention

In order to solve the defects in the prior art, the invention aims to provide a mower with high grass discharging efficiency.

In order to achieve the above object, the present invention adopts the following technical scheme:

a mower, comprising: a cutting blade that performs a cutting function when rotated about a first axis; a chassis formed with a cutting space covering the cutting blade; the travelling wheels are symmetrically arranged on two sides of the first plane; the chassis includes: a vortex portion extending in a circumferential direction around the first axis to form a vortex in the cutting space; a guide portion provided in a flow path of the vortex to guide the vortex to flow out substantially in a tangential direction of the vortex; a stopper portion for preventing at least part of the vortex from continuing to circulate in the vortex portion when flowing through the guide portion so as to increase the flow rate of the vortex flowing out of the guide portion; wherein at least a portion of the lead-out and at least a portion of the stop are located on the same side of the first plane.

Further, the stop portion is formed with a stop surface for stopping the air flow, at least a portion of the stop surface and at least a portion of the lead-out portion being located on the same side of the first plane.

Further, the stop surface and the lead-out portion are both located on the same side of the first plane.

Further, the stop surface and at least a portion of the lead-out are located on the same side of the first plane.

Further, the mower further comprises: a motor including a motor shaft for driving the cutting blade to rotate; the chassis is also formed with a mounting hole for allowing the motor shaft to pass through; at least a portion of the stopper is located between the lead-out portion and the mounting hole in a direction perpendicular to the first plane.

Further, the stop portion and the lead-out portion are both disposed on the same side of a second plane passing through the first axis and perpendicular to the first plane.

Further, a ratio of a dimension of the stopper portion in the first axis direction to a depth of the vortex portion in the first axis direction is 0.1 or more and 0.5 or less.

Further, the vortex portion includes: an inner ring surrounding the first axis; an outer ring disposed around the inner ring, a flow path of the vortex portion being formed between the outer ring and the inner ring; the deriving unit includes: the first guide surface is connected with the inner ring; the second guide surface is connected with the outer ring; the stop surface is arranged at the first guide-out surface.

Further, the stop surface extends from the inner race to the outer race; the vortex part further comprises a bottom surface for connecting the inner ring and the outer ring, and the stop part further comprises a connecting surface which extends from one side, far away from the bottom surface, of the stop surface along a plane obliquely intersecting with the stop surface, and the connecting surface is connected with the stop surface and the bottom surface.

Further, the stopper portion is integrally formed with the vortex portion.

Further, the stop portion is located within the vortex portion and at an edge of the lead-out portion.

The invention has the advantages that: the grass discharging efficiency of the grass cutter is high and the grass breaking capacity is good.

Drawings

FIG. 1 is a perspective view of a mower of one embodiment;

FIG. 2 is a bottom view of the mower of FIG. 1;

FIG. 3 is a circuit system diagram of the mower of FIG. 1;

FIG. 4 is a schematic diagram of the connection of a first signal line to a first output circuit board and a second output circuit board of the mower of FIG. 1;

FIG. 5 is a circuit system diagram of a mower of another embodiment;

FIG. 6 is a circuit diagram of a lawnmower of another embodiment;

FIG. 7 is a circuit system diagram of another embodiment of a chainsaw;

FIG. 8 is a schematic view of a portion of the structure of the mower of FIG. 1;

FIG. 9 is a perspective view of a chassis in the mower of FIG. 1;

FIG. 10 is a plan view of the chassis of FIG. 9;

FIG. 11 is a cross-sectional view of the chassis of FIG. 10 taken along line V-V;

fig. 12 is a perspective view of the chassis of fig. 9 with a plug attached.

Detailed Description

The garden tool shown in fig. 1 may be an electric machine for working vegetation, shrubs, etc. outdoors, and in this embodiment, the garden tool is a hand-propelled power tool, and in particular, taking the mower 500 as an example, the mower 500 may be operated by a user to cut lawns, vegetation, etc.

As shown in fig. 1 to 3, the mower 500 includes: host 51 and operating device 52, host 51 includes: mainframe housing 511, prime mover, and work assembly 513, wherein work assembly 513 includes: a working element for performing the tool function of the garden tool, in particular a cutting element for mowing, and further a cutting blade 513a, for the mower 500. The main body case 511 is used for mounting a prime mover and a working element for outputting power. For mower 500, main housing 511 may contain chassis 60. The prime mover is used to output power to the working element to drive the working element in motion, and in this embodiment is a motor 512 capable of driving the cutting blade 513a in rotation. The operation device 52 is for operation by a user to control the host 51, and the operation device 52 includes an operation element for operation by the user, specifically, a trigger 521. The mower 500 is a push type power tool, and further includes a link assembly 53, wherein the link assembly 53 connects the main body 51 and the operating device 52. The mower 500 further comprises a pair of road wheels 514, the road wheels 514 driving the mower 500 to travel on the ground, the two road wheels 514 being symmetrically arranged on both sides of the first plane 501.

The link assembly 53 includes a pair of links 531, and the links 531 are used to connect the main body 51 and the operating device 52. The two links 531 are symmetrically disposed on both sides of the first plane 501. In the present embodiment, the region where the operation device 52 of the link assembly 53 is provided is defined as an operation region 502, the region where the host 51 of the link assembly 53 is provided is defined as a work region 503, the operation device 52 is located in the operation region 502, and the host 51 is located in the work region 503. The link assembly 53 further includes: an armrest 532, the armrest 532 being held in an operative position by a user standing to propel the mower 500. The armrest 532 connects the two links 531 and is located at one end of the link 531 remote from the host 51.

As shown in fig. 1 to 4, a signal acquisition system 523 is further provided in the operation region 502, and the signal acquisition system 523 is connected to the operation device 52 to receive input information of the operation device 52. Also disposed within work area 503 is a signal output system 515, signal output system 515 being used to control the output of work assembly 513. The operating device 52 further includes: an operation table 522, the operation table 522 connects the two links 531, and the operation table 522 is also located between the armrest 532 and the main body 51. The trigger 521 is rotatably coupled to the console 522 such that a user can rotate the trigger 521 such that the trigger 521 engages the armrest 532 and then grasp the trigger 521 and the armrest 532 with the user's hand. The signal acquisition system 523 is disposed within the space surrounded by the console 522. The signal output system 515 is disposed in a space surrounded by the main body housing 511.

Mower 500 further comprises: the signal line assembly 54, the signal line assembly 54 connects the signal output system 515 and the signal acquisition system 523 to form a communication connection therebetween. Thus, after collecting the signals output from signal operating device 52, signal line assembly 54 transmits the information to signal output system 515, and signal output system 515 controls working assembly 513 to perform the corresponding functions in the corresponding states.

The signal acquisition system 523 includes: the signal circuit board 523a, the signal output system 515 includes: the first output circuit board 515a, the first output circuit board 515a being connected to the motor 512. The signal circuit board 523a is used for mounting or connecting a signal switch, which is controlled by an operation element. The first output circuit board 515a sends signals to the operating components, electronic switches, circuit boards, etc. within the operating area 503. The signal line assembly 54 includes: and first signal lines 541, the first signal lines 541 respectively connecting the first output circuit board 515a and the signal circuit board 523a so as to enable communication between the first output circuit board 515a and the signal circuit board 523 a.

In traditional garden tools, each electronic component is connected through a power line and an electronic switch, and the garden tool has the advantages of high power loss, high cable cost, complex wiring and disordered internal structure of the machine. In this embodiment, the first signal line 541 is used to connect the signal circuit board 523a and the first output circuit board 515a, so that a total signal line can realize connection between electronic components, so that the mower 500 of this embodiment has small power loss, low cable cost, simple wiring, and simple internal structure of the machine. Moreover, because the cables in the mower 500 are fewer and the flat cable is simple, the mower 500 has good stability, is not easy to damage and is convenient to maintain.

In the present embodiment, the signal acquisition system 523 is provided with only one signal circuit board 523a, and it will be understood that, in other embodiments, the signal acquisition system 523 also includes a plurality of signal circuit boards 523a, and the plurality of signal circuit boards 523a are in communication connection through signal lines.

Mower 500 further includes a power source, specifically a battery pack 516, battery pack 516 for powering motor 512, battery pack 516 and motor 512 being mounted to host 51. The signal output system 515 further includes: the second output circuit board 515b, the second output circuit board 515b is disposed within the main body case 511. The second output circuit board 515b is in communication with the battery pack 516. The first signal line 541 is also connected with a splitter 542, and the splitter 542 connects two output terminals 542a, and the two output terminals 542a are connected to the first output circuit board 515a and the second output circuit board 515b, respectively, so that the first output circuit board 515a is communicatively connected with the first signal circuit board 523a through the first signal line 541, and the second output circuit board 515b is communicatively connected with the first signal circuit board 523a through the first signal line 541.

In this embodiment, work assembly 513 also includes other functional elements for performing additional functions of mower 500, such as lighting element 581, self-propelled motor, and the like. This functional element is exemplified in this embodiment as a lighting element 581. The mower 500 further comprises a third output circuit board 515c for controlling the lighting elements 581, the third output circuit board 515c being connected to the first output circuit board 515 a.

The first output circuit board 515a is also mounted or connected with a first access terminal 515d, and the first access terminal 515d is used for receiving a signal output by the first signal line 541. The second output circuit board 515b is also mounted or connected with a second access terminal 515e, and the second access terminal 515e is used to receive the signal output from the first signal line 541. The first access terminal 515d is connected to one of the two output terminals 542a connected to the splitter 542, and the second access terminal 515e is connected to the other of the two output terminals 542a connected to the splitter 542. The two output terminals 542a are provided with a USB female socket, and the first access terminal 515d and the second access terminal 515e are provided with a USB male socket. Furthermore, the USB female seat is a TYPE-C female seat, and the USB male seat is a TYPE-C male seat. Thus, the signal line assembly 54 has good versatility, is convenient to maintain, and can improve the stability of the mower 500. Of course, it will be appreciated that in other embodiments, the output terminal 542a may be provided with a USB male socket, while the first and

second access terminals

515d, 515e are provided with a USB female socket.

As shown in fig. 5 for another embodiment of a mower 55, a signal output system 551 includes: a first output circuit board 552 and a second output circuit board 553. The motor 554 and the battery pack 555 are connected to the first output circuit board 552, and the signal circuit board 556 and the first output circuit board 552 are connected by signal lines. The second output circuit board 553 is connected to a functional element 557 for realizing other functions of the mower 55.

It will be appreciated that the circuitry enabled by the signal acquisition system 523, the signal output system 515 and the signal line assembly 54 in this embodiment is also applicable to other garden tools, such as snowploughs, lawnmowers, blowers, chainsaws, pruners, and the like.

Specifically, for example, in the grass trimmer 56 shown in fig. 6, the signal circuit board 561 is connected to the first output circuit board 562 and the second output circuit board 563 through signal lines, the first output circuit board 562 is connected to the motor 564, and the second output circuit board 563 is connected to the battery pack 565. For example, the chainsaw 57 shown in fig. 7, the signal circuit board 571 is connected to a first output circuit board 572 through a signal line, and the first output circuit board 572 is connected to a battery pack 573 and a motor 574. The signal output system 575 also includes a second output circuit board 576, where the second output circuit board 576 is connected to a functional element 577, and the functional element 577 may be, for example, a lighting element.

As shown in fig. 1 and 8, the mower 500 further includes: an illumination assembly 58 and a status display assembly 59. The illumination assembly 58 includes the illumination element 581 and the illumination switch 582 described above, and the illumination element 581 is disposed within the work area 503 to illuminate an area on the front side of the mower 500, thereby facilitating the user's work in a poor light environment. The illumination element 581 is disposed on the main body 51, and further, the illumination element 581 is disposed on the main body case 511. The illumination switch 582 is used for a user to operate to control whether the illumination element 581 is lighted. The status display assembly 59 includes: status display light 591, status display light 591 may be capable of displaying the operational status of mower 500, and status display light 591 may be specific to, for example, whether mower 500 is activated. Wherein the illumination switch 582 and status display lamp 591 are both located within the operating area 502. In this way, when the user stands on the rear side of the operation device 52, the user can conveniently operate the illumination switch 582 to cause the illumination element 581 to be lighted. In particular, during operation of mower 500, a user does not need to unclamp trigger 521 to walk to the side or front of mower 500 to activate illumination element 581. Therefore, a user can conveniently operate the illumination switch 582 at any time during the operation of the mower 500, thereby improving the convenience of operation. And the user can conveniently observe the display state of the state display assembly 59, and the user does not need to purposely leave the operation position to observe the state display assembly 59.

The illumination switch 582 and the status display lamp 591 are provided on the operation panel 522, and the illumination switch 582 and the status display lamp 591 are also located between the trigger 521 and the main body 51, thereby facilitating the operation of the user.

The center of the console 522 is also provided with a safety switch 524, and the safety switch 524 and the trigger 521 constitute a switch group for starting the motor 512. When one of the safety switch 524 and the trigger 521 is not triggered, the mower 500 is in a stopped state. Specifically, when the safety switch 524 is triggered, the user activates the trigger 521 and the motor 512 is activated; while when the safety switch 524 is not activated, the user activates the trigger 521 to activate the motor 512. The illumination switch 582 and the status display lamp 591 are respectively located at two sides of the safety switch 524, so that the structural layout on the console 522 is more reasonable, and the user can operate the mower 500 more conveniently.

In this embodiment, the illumination switch 582 and the status display lamp 591 are further disposed on both sides of the first plane 501, respectively, so that it is convenient for the user to operate the illumination switch 582 and to observe the display status of the status display lamp 591. It will be appreciated that in other embodiments, the illumination switch 582 may be provided on the armrest 532 or near the armrest 532, so long as the user is able to operate the illumination switch 582 without leaving the operating region 502 while standing on the rear side of the mower 500.

Specifically, the armrest 532 includes: a cross bar 532a, the cross bar 532a is for a user to hold, and the cross bar 532a extends in a direction perpendicular to the link 531. The minimum distance between the light switch 582 and the crossbar 532a is greater than or equal to 0 and less than or equal to 30 cm. In this way, it can be ensured that the user can extend the arm to operate the illumination switch 582 while holding the cross bar 532 a.

More specifically, the illumination switch 582 is a membrane switch that occupies a small space and is inexpensive to manufacture. The illumination switch 582 is further provided with an LED lamp, so that a user can conveniently observe whether the illumination switch 582 is triggered or not in an environment where light is relatively bright.

In the present embodiment, the number of status display lamps 591 is 5, and the five status display lamps 591 are respectively: an operation state display lamp 591, an operation state display lamp, a temperature state display lamp 591, a load state display lamp 591, and an electric quantity state display lamp 591. The operating state display lamp 591 is used to display whether the mower 500 has been started, so that whether the mower 500 has been damaged is judged by the display state of the operating state display lamp 591. The operation mode display lamp is used for displaying a folded state of the mower 500 or a telescopic state of the link assembly 53 of the mower 500. The temperature status display lamp 591 is used to display whether the temperature of the battery pack 516 or the motor 512 or the like exceeds a corresponding preset temperature. The load status indicator light 591 is used to indicate whether the mower 500 is in an overload condition. The charge state display lamp 591 is used for displaying the remaining charge of the battery pack 516 or for displaying whether the remaining charge of the battery pack 516 is lower than a preset charge.

It will be appreciated that the configuration and location of the illumination assembly 58 and status display assembly 59 in this embodiment is applicable not only to the mower 500, but also to other hand propelled power tools, such as snow throwers, where the working element is a snow plow blade for sweeping snow.

As shown in fig. 1, 2 and 9, the chassis 60 is formed with a cutting space 60a for covering the cutting blade 513a. Within this cutting space 60a, the cutting blade 513a rotates about the first axis 504, thereby performing a cutting function.

As shown in fig. 9 and 12, the mower 500 has a lead-out mode and a grass chopping mode. When mower 500 is in the export mode, clippings can be expelled out of chassis 60. When the mower is in the grass cutting mode, grass clippings will fall under the chassis 60.

As shown in fig. 9 to 11, the chassis 60 includes: a vortex portion 61 and a lead-out portion 62. The vortex portion 61 is configured to extend in a circumferential direction about the first axis 504 to form a vortex within the cutting space 60a. The swirl portion 61 forms a swirl passage 611, and the swirl flow flows along one flow path 60b in the swirl passage 611. The flow path 60b also extends substantially in the circumferential direction. The guide portion 62 is provided in the flow path 60b of the vortex, and the guide portion 62 extends from the vortex portion 61 in the tangential direction of the vortex, and the guide portion 62 guides the vortex to flow out in the tangential direction of the flow path 60 b. So that when mower 500 is in the extraction mode, extraction portion 62 is able to direct clippings to move along flow path 60b of vortex channel 611, and then when the clippings move to extraction portion 62, extraction portion 62 directs a portion of the clippings away from chassis 60 tangentially along flow path 60b, thereby discharging the portion of the clippings to the outside of mower 500 or collecting the portion of the clippings in a collection basket.

Mower 500 further includes a plug 517, wherein when plug 517 is mounted to lead-out portion 62, lead-out portion 62 is sealed so that mower 500 is in a grass cutting mode. When the plug 517 is not attached to the lead-out portion 62, the lead-out portion 62 is opened, and the air flow can flow out from the lead-out portion 62, so that the mower 500 is in the lead-out mode.

In the present embodiment, the chassis 60 further includes: a stopper 63, the stopper 63 preventing the vortex from continuing to circulate in the vortex portion 61 beyond the lead-out portion 62 when flowing through the lead-out portion 62, thereby increasing the flow rate of the vortex flowing out of the lead-out portion 62. At least a portion of the lead-out 62 and at least a portion of the stop 63 are located on the same side of the first plane 501, the first plane 501 passing through the first axis 504. The stopper 63 can increase the flow rate of the vortex flowing out from the guide 62 when the mower 500 is in the guide-out mode, thereby increasing the grass collection efficiency of the grass clippings, and can stop the grass clippings when the mower 500 is in the grass breaking mode, so that a part of the grass clippings falls into the cutting area of the cutting blade 513a again, and is cut by the cutting blade 513a once, thereby increasing the grass breaking capability.

Specifically, the chassis 60 further includes a mounting portion 64, the mounting portion 64 for mounting the motor 512, the mounting portion 64 being formed with a hole 641 for allowing the motor shaft to pass through about the first axis 504.

The vortex portion 61 includes: an inner race 612, an outer race 613, and a bottom surface 614. An inner race 612 is formed about the first axis 504, the inner race 612 being coupled to the mounting portion 64. An outer race 613 is disposed around the inner race 612. Bottom surface 614 connects inner race 612 and outer race 613. A vortex passage 611 of the vortex portion 61 is formed between the inner ring 612 and the outer ring 613.

The deriving unit 62 includes: a first lead-out face 621, a second lead-out face 622, and a lead-out bottom face 623. The first output surface 621 is connected to the inner ring 612, and the second output surface 622 is connected to the outer ring 613. The first lead-out face 621 extends from the inner race 612 substantially tangentially to the inner race 612 and the second lead-out face 622 extends from the outer race 613 substantially tangentially to the outer race 613. The leading bottom surface 623 connects the first leading surface 621 and the second leading surface 622, and the leading bottom surface 623 is also connected to the bottom surface 614 of the vortex portion 61.

The stopper 63 includes: a stop surface 631 and a connection surface 632. The stop surface 631 serves to stop the air flow flowing in the vortex portion 61, so that the air flow flows out from the guide portion 62. The lead-out 62 is located substantially on a first side of the first plane 501. It will be appreciated that in this embodiment, more than 90% of the lead-out portions 62 are located on the first side of the first plane 501, and that the lead-out portions 62 may be considered to be located substantially on the first side of the first plane 501. The stop surface 631 is also located on a first side of the first plane 501, i.e. the stop surface 631 and the lead-out 62 are located on the same side of the first plane 501. Alternatively, in other embodiments, the stop surface 631 and a portion of the lead-out 62 are on the same side of the first plane 501. Alternatively, in other embodiments, at least a portion of the stop surface 631 and at least a portion of the lead-out 62 are on the same side of the first plane 501.

The stopper 63 is provided at an edge of the lead-out 62. Specifically, a stop surface 631 is provided at the first output surface 621, the stop surface 631 extending from the inner race 612 to the outer race 613. The stop surface 631 also extends from the bottom surface 614 in a direction away from the bottom surface 614, i.e. one side of the stop surface 631 is connected to the junction of the bottom surface 614 and the first outlet surface 621. The connection surface 632 extends from a side of the stop surface 631 remote from the bottom surface 614 along a plane obliquely intersecting the stop surface 631, the connection surface 632 connecting the stop surface 631 and the bottom surface 614.

In the present embodiment, the stopper 63 is integrally formed with the vortex portion 61, and the vortex portion 61 is recessed in the ground direction to form the stopper 63. The stopper 63 is located inside the vortex portion 61, the stopper 63 is also located in the vortex passage 611 formed by the vortex portion 61, and the stopper 63 is also located on the flow path 60b of the vortex.

The stop 63 and the guide 62 are also arranged on the same side of a second plane 505 passing through the first axis 504 and perpendicular to the first plane 501. That is, the stopper 63 and the guide 62 are provided at the rear of the chassis 60.

At least a portion of the stopper 63 is also located between the lead-out 62 and the hole 641 in a direction perpendicular to the first plane 501.

The ratio of the dimension L1 of the stop portion 63 in the direction of the first axis 504 to the depth L2 of the vortex portion 61 in the direction of the first axis 504 is 0.1 or more and 0.5 or less, so that on one hand, it is possible to avoid that the stop portion 63 is too large in size and thus effective vortex cannot be generated in the vortex portion 61, and on the other hand, it is also possible to avoid that the stop portion 63 is too small and thus the guiding efficiency of the guiding portion 62 and the grass breaking capability of the mower 500 are affected.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the invention in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the invention.

Claims

1. A mower, comprising:

a cutting blade that performs a cutting function when rotated about a first axis;

a chassis formed with a cutting space covering the cutting blade;

the travelling wheels are symmetrically arranged on two sides of the first plane;

the method is characterized in that:

the chassis includes:

a vortex portion extending in a circumferential direction around the first axis to form a vortex in the cutting space;

a guide portion provided in a flow path of the vortex to guide the vortex to flow out substantially in a tangential direction of the vortex; a stopper portion that prevents at least a part of the vortex from continuing to circulate in the vortex portion when flowing through the lead-out portion to increase a flow rate at which the vortex flows out of the lead-out portion;

wherein at least a portion of the stop and at least a portion of the lead-out are on the same side of the first plane;

the ratio of the dimension of the stopper portion in the first axis direction to the depth of the vortex portion in the first axis direction is 0.1 or more and 0.5 or less.

2. The mower of claim 1, wherein:

the stop portion is formed with a stop surface for stopping the air flow, at least a portion of the stop surface and at least a portion of the lead-out portion being located on the same side of the first plane.

3. The mower of claim 2, wherein:

the stop surface and at least a portion of the lead-out are on the same side of the first plane.

4. The mower of claim 1, wherein:

the mower further comprises:

a motor including a motor shaft for driving the cutting blade to rotate;

the chassis is also formed with a mounting hole allowing the motor shaft to pass through;

at least part of the stopper is located between the lead-out portion and the mounting hole in a direction perpendicular to the first plane.

5. The mower of claim 1, wherein:

the stop portion and the guide portion are both disposed on the same side of a second plane passing through the first axis and perpendicular to the first plane.

6. The mower of claim 2, wherein:

the vortex portion includes:

an inner ring surrounding the first axis;

an outer ring provided around the inner ring, wherein a flow path of the vortex portion is formed between the outer ring and the inner ring; the deriving unit includes:

the first guide surface is connected with the inner ring;

the second guide surface is connected with the outer ring;

the stop surface is arranged at the first guide-out surface.

7. The mower of claim 6, wherein:

the stop surface extends from the inner race to the outer race; the vortex part further comprises a bottom surface for connecting the inner ring and the outer ring, the stop part further comprises a connecting surface extending from one side, far away from the bottom surface, of the stop surface along a plane obliquely intersecting the stop surface, and the connecting surface is connected with the stop surface and the bottom surface.

8. The mower of claim 1, wherein:

the stop portion and the vortex portion are integrally formed.

9. The mower of claim 1, wherein:

the stop portion is located within the vortex portion and at an edge of the lead-out portion.